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Commit 3c0cb7c3 authored by Linus Torvalds's avatar Linus Torvalds
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Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm 

* 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm: (416 commits)
  ARM: DMA: add support for DMA debugging
  ARM: PL011: add DMA burst threshold support for ST variants
  ARM: PL011: Add support for transmit DMA
  ARM: PL011: Ensure IRQs are disabled in UART interrupt handler
  ARM: PL011: Separate hardware FIFO size from TTY FIFO size
  ARM: PL011: Allow better handling of vendor data
  ARM: PL011: Ensure error flags are clear at startup
  ARM: PL011: include revision number in boot-time port printk
  ARM: vexpress: add sched_clock() for Versatile Express
  ARM i.MX53: Make MX53 EVK bootable
  ARM i.MX53: Some bug fix about MX53 MSL code
  ARM: 6607/1: sa1100: Update platform device registration
  ARM: 6606/1: sa1100: Fix platform device registration
  ARM i.MX51: rename IPU irqs
  ARM i.MX51: Add ipu clock support
  ARM: imx/mx27_3ds: Add PMIC support
  ARM: DMA: Replace page_to_dma()/dma_to_page() with pfn_to_dma()/dma_to_pfn()
  mx51: fix usb clock support
  MX51: Add support for usb host 2
  arch/arm/plat-mxc/ehci.c: fix errors/typos
  ...
parents f70f5b9d 404a02cb
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Documentation/arm/00-INDEX
View file @ 3c0cb7c3
......@@ -34,3 +34,5 @@ memory.txt
- description of the virtual memory layout
nwfpe/
- NWFPE floating point emulator documentation
swp_emulation
- SWP/SWPB emulation handler/logging description
Documentation/arm/swp_emulation 0 → 100644
View file @ 3c0cb7c3
Software emulation of deprecated SWP instruction (CONFIG_SWP_EMULATE)
---------------------------------------------------------------------
ARMv6 architecture deprecates use of the SWP/SWPB instructions, and recommeds
moving to the load-locked/store-conditional instructions LDREX and STREX.
ARMv7 multiprocessing extensions introduce the ability to disable these
instructions, triggering an undefined instruction exception when executed.
Trapped instructions are emulated using an LDREX/STREX or LDREXB/STREXB
sequence. If a memory access fault (an abort) occurs, a segmentation fault is
signalled to the triggering process.
/proc/cpu/swp_emulation holds some statistics/information, including the PID of
the last process to trigger the emulation to be invocated. For example:
---
Emulated SWP: 12
Emulated SWPB: 0
Aborted SWP{B}: 1
Last process: 314
---
NOTE: when accessing uncached shared regions, LDREX/STREX rely on an external
transaction monitoring block called a global monitor to maintain update
atomicity. If your system does not implement a global monitor, this option can
cause programs that perform SWP operations to uncached memory to deadlock, as
the STREX operation will always fail.
arch/arm/Kconfig
View file @ 3c0cb7c3
This diff is collapsed.
arch/arm/Kconfig.debug
View file @ 3c0cb7c3
......@@ -23,7 +23,7 @@ config STRICT_DEVMEM
config FRAME_POINTER
bool
depends on !THUMB2_KERNEL
default y if !ARM_UNWIND
default y if !ARM_UNWIND || FUNCTION_GRAPH_TRACER
help
If you say N here, the resulting kernel will be slightly smaller and
faster. However, if neither FRAME_POINTER nor ARM_UNWIND are enabled,
......@@ -31,7 +31,7 @@ config FRAME_POINTER
reported is severely limited.
config ARM_UNWIND
bool "Enable stack unwinding support"
bool "Enable stack unwinding support (EXPERIMENTAL)"
depends on AEABI && EXPERIMENTAL
default y
help
......
arch/arm/Makefile
View file @ 3c0cb7c3
......@@ -154,10 +154,11 @@ machine-$(CONFIG_ARCH_MSM) := msm
machine-$(CONFIG_ARCH_MV78XX0) := mv78xx0
machine-$(CONFIG_ARCH_MX1) := imx
machine-$(CONFIG_ARCH_MX2) := imx
machine-$(CONFIG_ARCH_MX25) := mx25
machine-$(CONFIG_ARCH_MX25) := imx
machine-$(CONFIG_ARCH_MX3) := mx3
machine-$(CONFIG_ARCH_MX5) := mx5
machine-$(CONFIG_ARCH_MXC91231) := mxc91231
machine-$(CONFIG_ARCH_MXS) := mxs
machine-$(CONFIG_ARCH_NETX) := netx
machine-$(CONFIG_ARCH_NOMADIK) := nomadik
machine-$(CONFIG_ARCH_NS9XXX) := ns9xxx
......
arch/arm/boot/compressed/Makefile
View file @ 3c0cb7c3
......@@ -45,6 +45,10 @@ else
endif
endif
ifeq ($(CONFIG_ARCH_SHMOBILE),y)
OBJS += head-shmobile.o
endif
#
# We now have a PIC decompressor implementation. Decompressors running
# from RAM should not define ZTEXTADDR. Decompressors running directly
......
arch/arm/boot/compressed/head-shmobile.S 0 → 100644
View file @ 3c0cb7c3
/*
* The head-file for SH-Mobile ARM platforms
*
* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
* Simon Horman <horms@verge.net.au>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifdef CONFIG_ZBOOT_ROM
.section ".start", "ax"
/* load board-specific initialization code */
#include <mach/zboot.h>
b 1f
__atags:@ tag #1
.long 12 @ tag->hdr.size = tag_size(tag_core);
.long 0x54410001 @ tag->hdr.tag = ATAG_CORE;
.long 0 @ tag->u.core.flags = 0;
.long 0 @ tag->u.core.pagesize = 0;
.long 0 @ tag->u.core.rootdev = 0;
@ tag #2
.long 8 @ tag->hdr.size = tag_size(tag_mem32);
.long 0x54410002 @ tag->hdr.tag = ATAG_MEM;
.long CONFIG_MEMORY_SIZE @ tag->u.mem.size = CONFIG_MEMORY_SIZE;
.long CONFIG_MEMORY_START @ @ tag->u.mem.start = CONFIG_MEMORY_START;
@ tag #3
.long 0 @ tag->hdr.size = 0
.long 0 @ tag->hdr.tag = ATAG_NONE;
1:
/* Set board ID necessary for boot */
ldr r7, 1f @ Set machine type register
adr r8, __atags @ Set atag register
b 2f
1 : .long MACH_TYPE
2 :
#endif /* CONFIG_ZBOOT_ROM */
arch/arm/common/Kconfig
View file @ 3c0cb7c3
......@@ -37,7 +37,3 @@ config SHARP_PARAM
config SHARP_SCOOP
bool
config COMMON_CLKDEV
bool
select HAVE_CLK
arch/arm/common/Makefile
View file @ 3c0cb7c3
......@@ -17,3 +17,4 @@ obj-$(CONFIG_ARCH_IXP2000) += uengine.o
obj-$(CONFIG_ARCH_IXP23XX) += uengine.o
obj-$(CONFIG_PCI_HOST_ITE8152) += it8152.o
obj-$(CONFIG_COMMON_CLKDEV) += clkdev.o
obj-$(CONFIG_ARM_TIMER_SP804) += timer-sp.o
arch/arm/common/dmabounce.c
View file @ 3c0cb7c3
......@@ -328,7 +328,7 @@ static inline void unmap_single(struct device *dev, dma_addr_t dma_addr,
* substitute the safe buffer for the unsafe one.
* (basically move the buffer from an unsafe area to a safe one)
*/
dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
dma_addr_t __dma_map_single(struct device *dev, void *ptr, size_t size,
enum dma_data_direction dir)
{
dev_dbg(dev, "%s(ptr=%p,size=%d,dir=%x)\n",
......@@ -338,7 +338,7 @@ dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
return map_single(dev, ptr, size, dir);
}
EXPORT_SYMBOL(dma_map_single);
EXPORT_SYMBOL(__dma_map_single);
/*
* see if a mapped address was really a "safe" buffer and if so, copy
......@@ -346,7 +346,7 @@ EXPORT_SYMBOL(dma_map_single);
* the safe buffer. (basically return things back to the way they
* should be)
*/
void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
void __dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
enum dma_data_direction dir)
{
dev_dbg(dev, "%s(ptr=%p,size=%d,dir=%x)\n",
......@@ -354,9 +354,9 @@ void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
unmap_single(dev, dma_addr, size, dir);
}
EXPORT_SYMBOL(dma_unmap_single);
EXPORT_SYMBOL(__dma_unmap_single);
dma_addr_t dma_map_page(struct device *dev, struct page *page,
dma_addr_t __dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size, enum dma_data_direction dir)
{
dev_dbg(dev, "%s(page=%p,off=%#lx,size=%zx,dir=%x)\n",
......@@ -372,7 +372,7 @@ dma_addr_t dma_map_page(struct device *dev, struct page *page,
return map_single(dev, page_address(page) + offset, size, dir);
}
EXPORT_SYMBOL(dma_map_page);
EXPORT_SYMBOL(__dma_map_page);
/*
* see if a mapped address was really a "safe" buffer and if so, copy
......@@ -380,7 +380,7 @@ EXPORT_SYMBOL(dma_map_page);
* the safe buffer. (basically return things back to the way they
* should be)
*/
void dma_unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size,
void __dma_unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size,
enum dma_data_direction dir)
{
dev_dbg(dev, "%s(ptr=%p,size=%d,dir=%x)\n",
......@@ -388,7 +388,7 @@ void dma_unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size,
unmap_single(dev, dma_addr, size, dir);
}
EXPORT_SYMBOL(dma_unmap_page);
EXPORT_SYMBOL(__dma_unmap_page);
int dmabounce_sync_for_cpu(struct device *dev, dma_addr_t addr,
unsigned long off, size_t sz, enum dma_data_direction dir)
......
arch/arm/common/gic.c
View file @ 3c0cb7c3
......@@ -35,6 +35,9 @@
static DEFINE_SPINLOCK(irq_controller_lock);
/* Address of GIC 0 CPU interface */
void __iomem *gic_cpu_base_addr __read_mostly;
struct gic_chip_data {
unsigned int irq_offset;
void __iomem *dist_base;
......@@ -45,7 +48,7 @@ struct gic_chip_data {
#define MAX_GIC_NR 1
#endif
static struct gic_chip_data gic_data[MAX_GIC_NR];
static struct gic_chip_data gic_data[MAX_GIC_NR] __read_mostly;
static inline void __iomem *gic_dist_base(unsigned int irq)
{
......@@ -213,21 +216,16 @@ void __init gic_cascade_irq(unsigned int gic_nr, unsigned int irq)
set_irq_chained_handler(irq, gic_handle_cascade_irq);
}
void __init gic_dist_init(unsigned int gic_nr, void __iomem *base,
static void __init gic_dist_init(struct gic_chip_data *gic,
unsigned int irq_start)
{
unsigned int gic_irqs, irq_limit, i;
void __iomem *base = gic->dist_base;
u32 cpumask = 1 << smp_processor_id();
if (gic_nr >= MAX_GIC_NR)
BUG();
cpumask |= cpumask << 8;
cpumask |= cpumask << 16;
gic_data[gic_nr].dist_base = base;
gic_data[gic_nr].irq_offset = (irq_start - 1) & ~31;
writel(0, base + GIC_DIST_CTRL);
/*
......@@ -267,7 +265,7 @@ void __init gic_dist_init(unsigned int gic_nr, void __iomem *base,
/*
* Limit number of interrupts registered to the platform maximum
*/
irq_limit = gic_data[gic_nr].irq_offset + gic_irqs;
irq_limit = gic->irq_offset + gic_irqs;
if (WARN_ON(irq_limit > NR_IRQS))
irq_limit = NR_IRQS;
......@@ -276,7 +274,7 @@ void __init gic_dist_init(unsigned int gic_nr, void __iomem *base,
*/
for (i = irq_start; i < irq_limit; i++) {
set_irq_chip(i, &gic_chip);
set_irq_chip_data(i, &gic_data[gic_nr]);
set_irq_chip_data(i, gic);
set_irq_handler(i, handle_level_irq);
set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
}
......@@ -284,19 +282,12 @@ void __init gic_dist_init(unsigned int gic_nr, void __iomem *base,
writel(1, base + GIC_DIST_CTRL);
}
void __cpuinit gic_cpu_init(unsigned int gic_nr, void __iomem *base)
static void __cpuinit gic_cpu_init(struct gic_chip_data *gic)
{
void __iomem *dist_base;
void __iomem *dist_base = gic->dist_base;
void __iomem *base = gic->cpu_base;
int i;
if (gic_nr >= MAX_GIC_NR)
BUG();
dist_base = gic_data[gic_nr].dist_base;
BUG_ON(!dist_base);
gic_data[gic_nr].cpu_base = base;
/*
* Deal with the banked PPI and SGI interrupts - disable all
* PPI interrupts, ensure all SGI interrupts are enabled.
......@@ -314,6 +305,42 @@ void __cpuinit gic_cpu_init(unsigned int gic_nr, void __iomem *base)
writel(1, base + GIC_CPU_CTRL);
}
void __init gic_init(unsigned int gic_nr, unsigned int irq_start,
void __iomem *dist_base, void __iomem *cpu_base)
{
struct gic_chip_data *gic;
BUG_ON(gic_nr >= MAX_GIC_NR);
gic = &gic_data[gic_nr];
gic->dist_base = dist_base;
gic->cpu_base = cpu_base;
gic->irq_offset = (irq_start - 1) & ~31;
if (gic_nr == 0)
gic_cpu_base_addr = cpu_base;
gic_dist_init(gic, irq_start);
gic_cpu_init(gic);
}
void __cpuinit gic_secondary_init(unsigned int gic_nr)
{
BUG_ON(gic_nr >= MAX_GIC_NR);
gic_cpu_init(&gic_data[gic_nr]);
}
void __cpuinit gic_enable_ppi(unsigned int irq)
{
unsigned long flags;
local_irq_save(flags);
irq_to_desc(irq)->status |= IRQ_NOPROBE;
gic_unmask_irq(irq);
local_irq_restore(flags);
}
#ifdef CONFIG_SMP
void gic_raise_softirq(const struct cpumask *mask, unsigned int irq)
{
......
arch/arm/plat-versatile/timer-sp.c → arch/arm/common/timer-sp.c
View file @ 3c0cb7c3
/*
* linux/arch/arm/plat-versatile/timer-sp.c
* linux/arch/arm/common/timer-sp.c
*
* Copyright (C) 1999 - 2003 ARM Limited
* Copyright (C) 2000 Deep Blue Solutions Ltd
......@@ -26,8 +26,6 @@
#include <asm/hardware/arm_timer.h>
#include <plat/timer-sp.h>
/*
* These timers are currently always setup to be clocked at 1MHz.
*/
......@@ -46,7 +44,6 @@ static struct clocksource clocksource_sp804 = {
.rating = 200,
.read = sp804_read,
.mask = CLOCKSOURCE_MASK(32),
.shift = 20,
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
......@@ -63,8 +60,7 @@ void __init sp804_clocksource_init(void __iomem *base)
writel(TIMER_CTRL_32BIT | TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC,
clksrc_base + TIMER_CTRL);
cs->mult = clocksource_khz2mult(TIMER_FREQ_KHZ, cs->shift);
clocksource_register(cs);
clocksource_register_khz(cs, TIMER_FREQ_KHZ);
}
......
arch/arm/configs/mx3_defconfig
View file @ 3c0cb7c3
......@@ -84,6 +84,7 @@ CONFIG_SERIAL_IMX_CONSOLE=y
CONFIG_I2C=y
CONFIG_I2C_CHARDEV=y
CONFIG_I2C_IMX=y
CONFIG_SPI=y
CONFIG_W1=y
CONFIG_W1_MASTER_MXC=y
CONFIG_W1_SLAVE_THERM=y
......
arch/arm/include/asm/assembler.h
View file @ 3c0cb7c3
......@@ -18,6 +18,7 @@
#endif
#include <asm/ptrace.h>
#include <asm/domain.h>
/*
* Endian independent macros for shifting bytes within registers.
......@@ -157,16 +158,24 @@
#ifdef CONFIG_SMP
#define ALT_SMP(instr...) \
9998: instr
/*
* Note: if you get assembler errors from ALT_UP() when building with
* CONFIG_THUMB2_KERNEL, you almost certainly need to use
* ALT_SMP( W(instr) ... )
*/
#define ALT_UP(instr...) \
.pushsection ".alt.smp.init", "a" ;\
.long 9998b ;\
instr ;\
9997: instr ;\
.if . - 9997b != 4 ;\
.error "ALT_UP() content must assemble to exactly 4 bytes";\
.endif ;\
.popsection
#define ALT_UP_B(label) \
.equ up_b_offset, label - 9998b ;\
.pushsection ".alt.smp.init", "a" ;\
.long 9998b ;\
b . + up_b_offset ;\
W(b) . + up_b_offset ;\
.popsection
#else
#define ALT_SMP(instr...)
......@@ -177,16 +186,24 @@
/*
* SMP data memory barrier
*/
.macro smp_dmb
.macro smp_dmb mode
#ifdef CONFIG_SMP
#if __LINUX_ARM_ARCH__ >= 7
.ifeqs "\mode","arm"
ALT_SMP(dmb)
.else
ALT_SMP(W(dmb))
.endif
#elif __LINUX_ARM_ARCH__ == 6
ALT_SMP(mcr p15, 0, r0, c7, c10, 5) @ dmb
#else
#error Incompatible SMP platform
#endif
.ifeqs "\mode","arm"
ALT_UP(nop)
.else
ALT_UP(W(nop))
.endif
#endif
.endm
......@@ -206,12 +223,12 @@
*/
#ifdef CONFIG_THUMB2_KERNEL
.macro usraccoff, instr, reg, ptr, inc, off, cond, abort
.macro usraccoff, instr, reg, ptr, inc, off, cond, abort, t=T()
9999:
.if \inc == 1
\instr\cond\()bt \reg, [\ptr, #\off]
\instr\cond\()b\()\t\().w \reg, [\ptr, #\off]
.elseif \inc == 4
\instr\cond\()t \reg, [\ptr, #\off]
\instr\cond\()\t\().w \reg, [\ptr, #\off]
.else
.error "Unsupported inc macro argument"
.endif
......@@ -246,13 +263,13 @@
#else /* !CONFIG_THUMB2_KERNEL */
.macro usracc, instr, reg, ptr, inc, cond, rept, abort
.macro usracc, instr, reg, ptr, inc, cond, rept, abort, t=T()
.rept \rept
9999:
.if \inc == 1
\instr\cond\()bt \reg, [\ptr], #\inc
\instr\cond\()b\()\t \reg, [\ptr], #\inc
.elseif \inc == 4
\instr\cond\()t \reg, [\ptr], #\inc
\instr\cond\()\t \reg, [\ptr], #\inc
.else
.error "Unsupported inc macro argument"
.endif
......
arch/arm/include/asm/cache.h
View file @ 3c0cb7c3
......@@ -23,4 +23,6 @@
#define ARCH_SLAB_MINALIGN 8
#endif
#define __read_mostly __attribute__((__section__(".data..read_mostly")))
#endif
arch/arm/include/asm/clkdev.h
View file @ 3c0cb7c3
......@@ -12,23 +12,13 @@
#ifndef __ASM_CLKDEV_H
#define __ASM_CLKDEV_H
struct clk;
struct device;
#include <linux/slab.h>
struct clk_lookup {
struct list_head node;
const char *dev_id;
const char *con_id;
struct clk *clk;
};
#include <mach/clkdev.h>
struct clk_lookup *clkdev_alloc(struct clk *clk, const char *con_id,
const char *dev_fmt, ...);
void clkdev_add(struct clk_lookup *cl);
void clkdev_drop(struct clk_lookup *cl);
void clkdev_add_table(struct clk_lookup *, size_t);
int clk_add_alias(const char *, const char *, char *, struct device *);
static inline struct clk_lookup_alloc *__clkdev_alloc(size_t size)
{
return kzalloc(size, GFP_KERNEL);
}
#endif
arch/arm/include/asm/dma-mapping.h
View file @ 3c0cb7c3
......@@ -5,24 +5,29 @@
#include <linux/mm_types.h>
#include <linux/scatterlist.h>
#include <linux/dma-debug.h>
#include <asm-generic/dma-coherent.h>
#include <asm/memory.h>
#ifdef __arch_page_to_dma
#error Please update to __arch_pfn_to_dma
#endif
/*
* page_to_dma/dma_to_virt/virt_to_dma are architecture private functions
* used internally by the DMA-mapping API to provide DMA addresses. They
* must not be used by drivers.
* dma_to_pfn/pfn_to_dma/dma_to_virt/virt_to_dma are architecture private
* functions used internally by the DMA-mapping API to provide DMA
* addresses. They must not be used by drivers.
*/
#ifndef __arch_page_to_dma
static inline dma_addr_t page_to_dma(struct device *dev, struct page *page)
#ifndef __arch_pfn_to_dma
static inline dma_addr_t pfn_to_dma(struct device *dev, unsigned long pfn)
{
return (dma_addr_t)__pfn_to_bus(page_to_pfn(page));
return (dma_addr_t)__pfn_to_bus(pfn);
}
static inline struct page *dma_to_page(struct device *dev, dma_addr_t addr)
static inline unsigned long dma_to_pfn(struct device *dev, dma_addr_t addr)
{
return pfn_to_page(__bus_to_pfn(addr));
return __bus_to_pfn(addr);
}
static inline void *dma_to_virt(struct device *dev, dma_addr_t addr)
......@@ -35,14 +40,14 @@ static inline dma_addr_t virt_to_dma(struct device *dev, void *addr)
return (dma_addr_t)__virt_to_bus((unsigned long)(addr));
}
#else
static inline dma_addr_t page_to_dma(struct device *dev, struct page *page)
static inline dma_addr_t pfn_to_dma(struct device *dev, unsigned long pfn)
{
return __arch_page_to_dma(dev, page);
return __arch_pfn_to_dma(dev, pfn);
}
static inline struct page *dma_to_page(struct device *dev, dma_addr_t addr)
static inline unsigned long dma_to_pfn(struct device *dev, dma_addr_t addr)
{
return __arch_dma_to_page(dev, addr);
return __arch_dma_to_pfn(dev, addr);
}
static inline void *dma_to_virt(struct device *dev, dma_addr_t addr)
......@@ -293,13 +298,13 @@ extern int dma_needs_bounce(struct device*, dma_addr_t, size_t);
/*
* The DMA API, implemented by dmabounce.c. See below for descriptions.
*/
extern dma_addr_t dma_map_single(struct device *, void *, size_t,
extern dma_addr_t __dma_map_single(struct device *, void *, size_t,
enum dma_data_direction);
extern void dma_unmap_single(struct device *, dma_addr_t, size_t,
extern void __dma_unmap_single(struct device *, dma_addr_t, size_t,
enum dma_data_direction);
extern dma_addr_t dma_map_page(struct device *, struct page *,
extern dma_addr_t __dma_map_page(struct device *, struct page *,
unsigned long, size_t, enum dma_data_direction);
extern void dma_unmap_page(struct device *, dma_addr_t, size_t,
extern void __dma_unmap_page(struct device *, dma_addr_t, size_t,
enum dma_data_direction);
/*
......@@ -323,6 +328,34 @@ static inline int dmabounce_sync_for_device(struct device *d, dma_addr_t addr,
}
static inline dma_addr_t __dma_map_single(struct device *dev, void *cpu_addr,
size_t size, enum dma_data_direction dir)
{
__dma_single_cpu_to_dev(cpu_addr, size, dir);
return virt_to_dma(dev, cpu_addr);
}
static inline dma_addr_t __dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size, enum dma_data_direction dir)
{
__dma_page_cpu_to_dev(page, offset, size, dir);
return pfn_to_dma(dev, page_to_pfn(page)) + offset;
}
static inline void __dma_unmap_single(struct device *dev, dma_addr_t handle,
size_t size, enum dma_data_direction dir)
{
__dma_single_dev_to_cpu(dma_to_virt(dev, handle), size, dir);
}
static inline void __dma_unmap_page(struct device *dev, dma_addr_t handle,
size_t size, enum dma_data_direction dir)
{
__dma_page_dev_to_cpu(pfn_to_page(dma_to_pfn(dev, handle)),
handle & ~PAGE_MASK, size, dir);
}
#endif /* CONFIG_DMABOUNCE */
/**
* dma_map_single - map a single buffer for streaming DMA
* @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
......@@ -340,11 +373,16 @@ static inline int dmabounce_sync_for_device(struct device *d, dma_addr_t addr,
static inline dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
size_t size, enum dma_data_direction dir)
{
dma_addr_t addr;
BUG_ON(!valid_dma_direction(dir));
__dma_single_cpu_to_dev(cpu_addr, size, dir);
addr = __dma_map_single(dev, cpu_addr, size, dir);
debug_dma_map_page(dev, virt_to_page(cpu_addr),
(unsigned long)cpu_addr & ~PAGE_MASK, size,
dir, addr, true);
return virt_to_dma(dev, cpu_addr);
return addr;
}
/**
......@@ -364,11 +402,14 @@ static inline dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size, enum dma_data_direction dir)
{
dma_addr_t addr;
BUG_ON(!valid_dma_direction(dir));
__dma_page_cpu_to_dev(page, offset, size, dir);
addr = __dma_map_page(dev, page, offset, size, dir);
debug_dma_map_page(dev, page, offset, size, dir, addr, false);
return page_to_dma(dev, page) + offset;
return addr;
}
/**
......@@ -388,7 +429,8 @@ static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
static inline void dma_unmap_single(struct device *dev, dma_addr_t handle,
size_t size, enum dma_data_direction dir)
{
__dma_single_dev_to_cpu(dma_to_virt(dev, handle), size, dir);
debug_dma_unmap_page(dev, handle, size, dir, true);
__dma_unmap_single(dev, handle, size, dir);
}
/**
......@@ -408,10 +450,9 @@ static inline void dma_unmap_single(struct device *dev, dma_addr_t handle,
static inline void dma_unmap_page(struct device *dev, dma_addr_t handle,
size_t size, enum dma_data_direction dir)
{
__dma_page_dev_to_cpu(dma_to_page(dev, handle), handle & ~PAGE_MASK,
size, dir);
debug_dma_unmap_page(dev, handle, size, dir, false);
__dma_unmap_page(dev, handle, size, dir);
}
#endif /* CONFIG_DMABOUNCE */
/**
* dma_sync_single_range_for_cpu
......@@ -437,6 +478,8 @@ static inline void dma_sync_single_range_for_cpu(struct device *dev,
{
BUG_ON(!valid_dma_direction(dir));
debug_dma_sync_single_for_cpu(dev, handle + offset, size, dir);
if (!dmabounce_sync_for_cpu(dev, handle, offset, size, dir))
return;
......@@ -449,6 +492,8 @@ static inline void dma_sync_single_range_for_device(struct device *dev,
{
BUG_ON(!valid_dma_direction(dir));
debug_dma_sync_single_for_device(dev, handle + offset, size, dir);
if (!dmabounce_sync_for_device(dev, handle, offset, size, dir))
return;
......
arch/arm/include/asm/domain.h
View file @ 3c0cb7c3
......@@ -45,13 +45,17 @@
*/
#define DOMAIN_NOACCESS 0
#define DOMAIN_CLIENT 1
#ifdef CONFIG_CPU_USE_DOMAINS
#define DOMAIN_MANAGER 3
#else
#define DOMAIN_MANAGER 1
#endif
#define domain_val(dom,type) ((type) << (2*(dom)))
#ifndef __ASSEMBLY__
#ifdef CONFIG_MMU
#ifdef CONFIG_CPU_USE_DOMAINS
#define set_domain(x) \
do { \
__asm__ __volatile__( \
......@@ -74,5 +78,28 @@
#define modify_domain(dom,type) do { } while (0)
#endif
/*
* Generate the T (user) versions of the LDR/STR and related
* instructions (inline assembly)
*/
#ifdef CONFIG_CPU_USE_DOMAINS
#define T(instr) #instr "t"
#else
#define T(instr) #instr
#endif
#endif /* !__ASSEMBLY__ */
#else /* __ASSEMBLY__ */
/*
* Generate the T (user) versions of the LDR/STR and related
* instructions
*/
#ifdef CONFIG_CPU_USE_DOMAINS
#define T(instr) instr ## t
#else
#define T(instr) instr
#endif
#endif /* __ASSEMBLY__ */
#endif /* !__ASM_PROC_DOMAIN_H */
arch/arm/include/asm/elf.h
View file @ 3c0cb7c3
......@@ -99,6 +99,8 @@ struct elf32_hdr;
extern int elf_check_arch(const struct elf32_hdr *);
#define elf_check_arch elf_check_arch
#define vmcore_elf64_check_arch(x) (0)
extern int arm_elf_read_implies_exec(const struct elf32_hdr *, int);
#define elf_read_implies_exec(ex,stk) arm_elf_read_implies_exec(&(ex), stk)
......
arch/arm/include/asm/entry-macro-multi.S 0 → 100644
View file @ 3c0cb7c3
/*
* Interrupt handling. Preserves r7, r8, r9
*/
.macro arch_irq_handler_default
get_irqnr_preamble r5, lr
1: get_irqnr_and_base r0, r6, r5, lr
movne r1, sp
@
@ routine called with r0 = irq number, r1 = struct pt_regs *
@
adrne lr, BSYM(1b)
bne asm_do_IRQ
#ifdef CONFIG_SMP
/*
* XXX
*
* this macro assumes that irqstat (r6) and base (r5) are
* preserved from get_irqnr_and_base above
*/
ALT_SMP(test_for_ipi r0, r6, r5, lr)
ALT_UP_B(9997f)
movne r1, sp
adrne lr, BSYM(1b)
bne do_IPI
#ifdef CONFIG_LOCAL_TIMERS
test_for_ltirq r0, r6, r5, lr
movne r0, sp
adrne lr, BSYM(1b)
bne do_local_timer
#endif
#endif
9997:
.endm
.macro arch_irq_handler, symbol_name
.align 5
.global \symbol_name
\symbol_name:
mov r4, lr
arch_irq_handler_default
mov pc, r4
.endm
arch/arm/include/asm/futex.h
View file @ 3c0cb7c3
......@@ -13,12 +13,13 @@
#include <linux/preempt.h>
#include <linux/uaccess.h>
#include <asm/errno.h>
#include <asm/domain.h>
#define __futex_atomic_op(insn, ret, oldval, uaddr, oparg) \
__asm__ __volatile__( \
"1: ldrt %1, [%2]\n" \
"1: " T(ldr) " %1, [%2]\n" \
" " insn "\n" \
"2: strt %0, [%2]\n" \
"2: " T(str) " %0, [%2]\n" \
" mov %0, #0\n" \
"3:\n" \
" .pushsection __ex_table,\"a\"\n" \
......@@ -97,10 +98,10 @@ futex_atomic_cmpxchg_inatomic(int __user *uaddr, int oldval, int newval)
pagefault_disable(); /* implies preempt_disable() */
__asm__ __volatile__("@futex_atomic_cmpxchg_inatomic\n"
"1: ldrt %0, [%3]\n"
"1: " T(ldr) " %0, [%3]\n"
" teq %0, %1\n"
" it eq @ explicit IT needed for the 2b label\n"
"2: streqt %2, [%3]\n"
"2: " T(streq) " %2, [%3]\n"
"3:\n"
" .pushsection __ex_table,\"a\"\n"
" .align 3\n"
......
arch/arm/include/asm/hardirq.h
View file @ 3c0cb7c3
......@@ -5,13 +5,31 @@
#include <linux/threads.h>
#include <asm/irq.h>
#define NR_IPI 5
typedef struct {
unsigned int __softirq_pending;
#ifdef CONFIG_LOCAL_TIMERS
unsigned int local_timer_irqs;
#endif
#ifdef CONFIG_SMP
unsigned int ipi_irqs[NR_IPI];
#endif
} ____cacheline_aligned irq_cpustat_t;
#include <linux/irq_cpustat.h> /* Standard mappings for irq_cpustat_t above */
#define __inc_irq_stat(cpu, member) __IRQ_STAT(cpu, member)++
#define __get_irq_stat(cpu, member) __IRQ_STAT(cpu, member)
#ifdef CONFIG_SMP
u64 smp_irq_stat_cpu(unsigned int cpu);
#else
#define smp_irq_stat_cpu(cpu) 0
#endif
#define arch_irq_stat_cpu smp_irq_stat_cpu
#if NR_IRQS > 512
#define HARDIRQ_BITS 10
#elif NR_IRQS > 256
......
arch/arm/include/asm/hardware/entry-macro-gic.S 0 → 100644
View file @ 3c0cb7c3
/*
* arch/arm/include/asm/hardware/entry-macro-gic.S
*
* Low-level IRQ helper macros for GIC
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <asm/hardware/gic.h>
#ifndef HAVE_GET_IRQNR_PREAMBLE
.macro get_irqnr_preamble, base, tmp
ldr \base, =gic_cpu_base_addr
ldr \base, [\base]
.endm
#endif
/*
* The interrupt numbering scheme is defined in the
* interrupt controller spec. To wit:
*
* Interrupts 0-15 are IPI
* 16-28 are reserved
* 29-31 are local. We allow 30 to be used for the watchdog.
* 32-1020 are global
* 1021-1022 are reserved
* 1023 is "spurious" (no interrupt)
*
* For now, we ignore all local interrupts so only return an interrupt if it's
* between 30 and 1020. The test_for_ipi routine below will pick up on IPIs.
*
* A simple read from the controller will tell us the number of the highest
* priority enabled interrupt. We then just need to check whether it is in the
* valid range for an IRQ (30-1020 inclusive).
*/
.macro get_irqnr_and_base, irqnr, irqstat, base, tmp
ldr \irqstat, [\base, #GIC_CPU_INTACK]
/* bits 12-10 = src CPU, 9-0 = int # */
ldr \tmp, =1021
bic \irqnr, \irqstat, #0x1c00
cmp \irqnr, #29
cmpcc \irqnr, \irqnr
cmpne \irqnr, \tmp
cmpcs \irqnr, \irqnr
.endm
/* We assume that irqstat (the raw value of the IRQ acknowledge
* register) is preserved from the macro above.
* If there is an IPI, we immediately signal end of interrupt on the
* controller, since this requires the original irqstat value which
* we won't easily be able to recreate later.
*/
.macro test_for_ipi, irqnr, irqstat, base, tmp
bic \irqnr, \irqstat, #0x1c00
cmp \irqnr, #16
strcc \irqstat, [\base, #GIC_CPU_EOI]
cmpcs \irqnr, \irqnr
.endm
/* As above, this assumes that irqstat and base are preserved.. */
.macro test_for_ltirq, irqnr, irqstat, base, tmp
bic \irqnr, \irqstat, #0x1c00
mov \tmp, #0
cmp \irqnr, #29
moveq \tmp, #1
streq \irqstat, [\base, #GIC_CPU_EOI]
cmp \tmp, #0
.endm
arch/arm/include/asm/hardware/gic.h
View file @ 3c0cb7c3
......@@ -33,10 +33,13 @@
#define GIC_DIST_SOFTINT 0xf00
#ifndef __ASSEMBLY__
void gic_dist_init(unsigned int gic_nr, void __iomem *base, unsigned int irq_start);
void gic_cpu_init(unsigned int gic_nr, void __iomem *base);
extern void __iomem *gic_cpu_base_addr;
void gic_init(unsigned int, unsigned int, void __iomem *, void __iomem *);
void gic_secondary_init(unsigned int);
void gic_cascade_irq(unsigned int gic_nr, unsigned int irq);
void gic_raise_softirq(const struct cpumask *mask, unsigned int irq);
void gic_enable_ppi(unsigned int);
#endif
#endif
arch/arm/include/asm/hw_breakpoint.h
View file @ 3c0cb7c3
......@@ -20,7 +20,7 @@ struct arch_hw_breakpoint_ctrl {
struct arch_hw_breakpoint {
u32 address;
u32 trigger;
struct perf_event *suspended_wp;
struct arch_hw_breakpoint_ctrl step_ctrl;
struct arch_hw_breakpoint_ctrl ctrl;
};
......
arch/arm/include/asm/io.h
View file @ 3c0cb7c3
......@@ -241,18 +241,15 @@ extern void _memset_io(volatile void __iomem *, int, size_t);
*
*/
#ifndef __arch_ioremap
#define ioremap(cookie,size) __arm_ioremap(cookie, size, MT_DEVICE)
#define ioremap_nocache(cookie,size) __arm_ioremap(cookie, size, MT_DEVICE)
#define ioremap_cached(cookie,size) __arm_ioremap(cookie, size, MT_DEVICE_CACHED)
#define ioremap_wc(cookie,size) __arm_ioremap(cookie, size, MT_DEVICE_WC)
#define iounmap(cookie) __iounmap(cookie)
#else
#define __arch_ioremap __arm_ioremap
#define __arch_iounmap __iounmap
#endif
#define ioremap(cookie,size) __arch_ioremap((cookie), (size), MT_DEVICE)
#define ioremap_nocache(cookie,size) __arch_ioremap((cookie), (size), MT_DEVICE)
#define ioremap_cached(cookie,size) __arch_ioremap((cookie), (size), MT_DEVICE_CACHED)
#define ioremap_wc(cookie,size) __arch_ioremap((cookie), (size), MT_DEVICE_WC)
#define iounmap(cookie) __arch_iounmap(cookie)
#endif
#define iounmap __arch_iounmap
/*
* io{read,write}{8,16,32} macros
......
arch/arm/include/asm/kexec.h
View file @ 3c0cb7c3
......@@ -33,10 +33,20 @@ static inline void crash_setup_regs(struct pt_regs *newregs,
if (oldregs) {
memcpy(newregs, oldregs, sizeof(*newregs));
} else {
__asm__ __volatile__ ("stmia %0, {r0 - r15}"
: : "r" (&newregs->ARM_r0));
__asm__ __volatile__ ("mrs %0, cpsr"
: "=r" (newregs->ARM_cpsr));
__asm__ __volatile__ (
"stmia %[regs_base], {r0-r12}\n\t"
"mov %[_ARM_sp], sp\n\t"
"str lr, %[_ARM_lr]\n\t"
"adr %[_ARM_pc], 1f\n\t"
"mrs %[_ARM_cpsr], cpsr\n\t"
"1:"
: [_ARM_pc] "=r" (newregs->ARM_pc),
[_ARM_cpsr] "=r" (newregs->ARM_cpsr),
[_ARM_sp] "=r" (newregs->ARM_sp),
[_ARM_lr] "=o" (newregs->ARM_lr)
: [regs_base] "r" (&newregs->ARM_r0)
: "memory"
);
}
}
......
arch/arm/include/asm/localtimer.h
View file @ 3c0cb7c3
......@@ -30,7 +30,6 @@ asmlinkage void do_local_timer(struct pt_regs *);
#include "smp_twd.h"
#define local_timer_ack() twd_timer_ack()
#define local_timer_stop() twd_timer_stop()
#else
......@@ -40,11 +39,6 @@ asmlinkage void do_local_timer(struct pt_regs *);
*/
int local_timer_ack(void);
/*
* Stop a local timer interrupt.
*/
void local_timer_stop(void);
#endif
/*
......@@ -52,12 +46,6 @@ void local_timer_stop(void);
*/
void local_timer_setup(struct clock_event_device *);
#else
static inline void local_timer_stop(void)
{
}
#endif
#endif
arch/arm/include/asm/mach/arch.h
View file @ 3c0cb7c3
......@@ -37,11 +37,20 @@ struct machine_desc {
struct meminfo *);
void (*reserve)(void);/* reserve mem blocks */
void (*map_io)(void);/* IO mapping function */
void (*init_early)(void);
void (*init_irq)(void);
struct sys_timer *timer; /* system tick timer */
void (*init_machine)(void);
#ifdef CONFIG_MULTI_IRQ_HANDLER
void (*handle_irq)(struct pt_regs *);
#endif
};
/*
* Current machine - only accessible during boot.
*/
extern struct machine_desc *machine_desc;
/*
* Set of macros to define architecture features. This is built into
* a table by the linker.
......
arch/arm/include/asm/mach/irq.h
View file @ 3c0cb7c3
......@@ -17,10 +17,12 @@ struct seq_file;
/*
* This is internal. Do not use it.
*/
extern unsigned int arch_nr_irqs;
extern void (*init_arch_irq)(void);
extern void init_FIQ(void);
extern int show_fiq_list(struct seq_file *, void *);
extern int show_fiq_list(struct seq_file *, int);
#ifdef CONFIG_MULTI_IRQ_HANDLER
extern void (*handle_arch_irq)(struct pt_regs *);
#endif
/*
* This is for easy migration, but should be changed in the source
......
arch/arm/include/asm/mach/time.h
View file @ 3c0cb7c3
......@@ -43,7 +43,6 @@ struct sys_timer {
#endif
};
extern struct sys_timer *system_timer;
extern void timer_tick(void);
#endif
arch/arm/include/asm/module.h
View file @ 3c0cb7c3
......@@ -8,11 +8,6 @@
struct unwind_table;
#ifdef CONFIG_ARM_UNWIND
struct arm_unwind_mapping {
Elf_Shdr *unw_sec;
Elf_Shdr *sec_text;
struct unwind_table *unwind;
};
enum {
ARM_SEC_INIT,
ARM_SEC_DEVINIT,
......@@ -21,13 +16,13 @@ enum {
ARM_SEC_DEVEXIT,
ARM_SEC_MAX,
};
#endif
struct mod_arch_specific {
struct arm_unwind_mapping map[ARM_SEC_MAX];
};
#else
struct mod_arch_specific {
};
#ifdef CONFIG_ARM_UNWIND
struct unwind_table *unwind[ARM_SEC_MAX];
#endif
};
/*
* Include the ARM architecture version.
......
arch/arm/include/asm/page.h
View file @ 3c0cb7c3
......@@ -151,13 +151,15 @@ extern void __cpu_copy_user_highpage(struct page *to, struct page *from,
#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
extern void copy_page(void *to, const void *from);
typedef unsigned long pteval_t;
#undef STRICT_MM_TYPECHECKS
#ifdef STRICT_MM_TYPECHECKS
/*
* These are used to make use of C type-checking..
*/
typedef struct { unsigned long pte; } pte_t;
typedef struct { pteval_t pte; } pte_t;
typedef struct { unsigned long pmd; } pmd_t;
typedef struct { unsigned long pgd[2]; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;
......@@ -175,7 +177,7 @@ typedef struct { unsigned long pgprot; } pgprot_t;
/*
* .. while these make it easier on the compiler
*/
typedef unsigned long pte_t;
typedef pteval_t pte_t;
typedef unsigned long pmd_t;
typedef unsigned long pgd_t[2];
typedef unsigned long pgprot_t;
......
arch/arm/include/asm/pgalloc.h
View file @ 3c0cb7c3
......@@ -30,14 +30,16 @@
#define pmd_free(mm, pmd) do { } while (0)
#define pgd_populate(mm,pmd,pte) BUG()
extern pgd_t *get_pgd_slow(struct mm_struct *mm);
extern void free_pgd_slow(struct mm_struct *mm, pgd_t *pgd);
#define pgd_alloc(mm) get_pgd_slow(mm)
#define pgd_free(mm, pgd) free_pgd_slow(mm, pgd)
extern pgd_t *pgd_alloc(struct mm_struct *mm);
extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
#define PGALLOC_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_REPEAT | __GFP_ZERO)
static inline void clean_pte_table(pte_t *pte)
{
clean_dcache_area(pte + PTE_HWTABLE_PTRS, PTE_HWTABLE_SIZE);
}
/*
* Allocate one PTE table.
*
......@@ -45,14 +47,14 @@ extern void free_pgd_slow(struct mm_struct *mm, pgd_t *pgd);
* into one table thus:
*
* +------------+
* | h/w pt 0 |
* +------------+
* | h/w pt 1 |
* +------------+
* | Linux pt 0 |
* +------------+
* | Linux pt 1 |
* +------------+
* | h/w pt 0 |
* +------------+
* | h/w pt 1 |
* +------------+
*/
static inline pte_t *
pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr)
......@@ -60,10 +62,8 @@ pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr)
pte_t *pte;
pte = (pte_t *)__get_free_page(PGALLOC_GFP);
if (pte) {
clean_dcache_area(pte, sizeof(pte_t) * PTRS_PER_PTE);
pte += PTRS_PER_PTE;
}
if (pte)
clean_pte_table(pte);
return pte;
}
......@@ -79,10 +79,8 @@ pte_alloc_one(struct mm_struct *mm, unsigned long addr)
pte = alloc_pages(PGALLOC_GFP, 0);
#endif
if (pte) {
if (!PageHighMem(pte)) {
void *page = page_address(pte);
clean_dcache_area(page, sizeof(pte_t) * PTRS_PER_PTE);
}
if (!PageHighMem(pte))
clean_pte_table(page_address(pte));
pgtable_page_ctor(pte);
}
......@@ -94,10 +92,8 @@ pte_alloc_one(struct mm_struct *mm, unsigned long addr)
*/
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
{
if (pte) {
pte -= PTRS_PER_PTE;
if (pte)
free_page((unsigned long)pte);
}
}
static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
......@@ -106,8 +102,10 @@ static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
__free_page(pte);
}
static inline void __pmd_populate(pmd_t *pmdp, unsigned long pmdval)
static inline void __pmd_populate(pmd_t *pmdp, phys_addr_t pte,
unsigned long prot)
{
unsigned long pmdval = (pte + PTE_HWTABLE_OFF) | prot;
pmdp[0] = __pmd(pmdval);
pmdp[1] = __pmd(pmdval + 256 * sizeof(pte_t));
flush_pmd_entry(pmdp);
......@@ -122,20 +120,16 @@ static inline void __pmd_populate(pmd_t *pmdp, unsigned long pmdval)
static inline void
pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep)
{
unsigned long pte_ptr = (unsigned long)ptep;
/*
* The pmd must be loaded with the physical
* address of the PTE table
* The pmd must be loaded with the physical address of the PTE table
*/
pte_ptr -= PTRS_PER_PTE * sizeof(void *);
__pmd_populate(pmdp, __pa(pte_ptr) | _PAGE_KERNEL_TABLE);
__pmd_populate(pmdp, __pa(ptep), _PAGE_KERNEL_TABLE);
}
static inline void
pmd_populate(struct mm_struct *mm, pmd_t *pmdp, pgtable_t ptep)
{
__pmd_populate(pmdp, page_to_pfn(ptep) << PAGE_SHIFT | _PAGE_USER_TABLE);
__pmd_populate(pmdp, page_to_phys(ptep), _PAGE_USER_TABLE);
}
#define pmd_pgtable(pmd) pmd_page(pmd)
......
arch/arm/include/asm/pgtable.h
View file @ 3c0cb7c3
This diff is collapsed.
arch/arm/include/asm/sched_clock.h 0 → 100644
View file @ 3c0cb7c3
/*
* sched_clock.h: support for extending counters to full 64-bit ns counter
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef ASM_SCHED_CLOCK
#define ASM_SCHED_CLOCK
#include <linux/kernel.h>
#include <linux/types.h>
struct clock_data {
u64 epoch_ns;
u32 epoch_cyc;
u32 epoch_cyc_copy;
u32 mult;
u32 shift;
};
#define DEFINE_CLOCK_DATA(name) struct clock_data name
static inline u64 cyc_to_ns(u64 cyc, u32 mult, u32 shift)
{
return (cyc * mult) >> shift;
}
/*
* Atomically update the sched_clock epoch. Your update callback will
* be called from a timer before the counter wraps - read the current
* counter value, and call this function to safely move the epochs
* forward. Only use this from the update callback.
*/
static inline void update_sched_clock(struct clock_data *cd, u32 cyc, u32 mask)
{
unsigned long flags;
u64 ns = cd->epoch_ns +
cyc_to_ns((cyc - cd->epoch_cyc) & mask, cd->mult, cd->shift);
/*
* Write epoch_cyc and epoch_ns in a way that the update is
* detectable in cyc_to_fixed_sched_clock().
*/
raw_local_irq_save(flags);
cd->epoch_cyc = cyc;
smp_wmb();
cd->epoch_ns = ns;
smp_wmb();
cd->epoch_cyc_copy = cyc;
raw_local_irq_restore(flags);
}
/*
* If your clock rate is known at compile time, using this will allow
* you to optimize the mult/shift loads away. This is paired with
* init_fixed_sched_clock() to ensure that your mult/shift are correct.
*/
static inline unsigned long long cyc_to_fixed_sched_clock(struct clock_data *cd,
u32 cyc, u32 mask, u32 mult, u32 shift)
{
u64 epoch_ns;
u32 epoch_cyc;
/*
* Load the epoch_cyc and epoch_ns atomically. We do this by
* ensuring that we always write epoch_cyc, epoch_ns and
* epoch_cyc_copy in strict order, and read them in strict order.
* If epoch_cyc and epoch_cyc_copy are not equal, then we're in
* the middle of an update, and we should repeat the load.
*/
do {
epoch_cyc = cd->epoch_cyc;
smp_rmb();
epoch_ns = cd->epoch_ns;
smp_rmb();
} while (epoch_cyc != cd->epoch_cyc_copy);
return epoch_ns + cyc_to_ns((cyc - epoch_cyc) & mask, mult, shift);
}
/*
* Otherwise, you need to use this, which will obtain the mult/shift
* from the clock_data structure. Use init_sched_clock() with this.
*/
static inline unsigned long long cyc_to_sched_clock(struct clock_data *cd,
u32 cyc, u32 mask)
{
return cyc_to_fixed_sched_clock(cd, cyc, mask, cd->mult, cd->shift);
}
/*
* Initialize the clock data - calculate the appropriate multiplier
* and shift. Also setup a timer to ensure that the epoch is refreshed
* at the appropriate time interval, which will call your update
* handler.
*/
void init_sched_clock(struct clock_data *, void (*)(void),
unsigned int, unsigned long);
/*
* Use this initialization function rather than init_sched_clock() if
* you're using cyc_to_fixed_sched_clock, which will warn if your
* constants are incorrect.
*/
static inline void init_fixed_sched_clock(struct clock_data *cd,
void (*update)(void), unsigned int bits, unsigned long rate,
u32 mult, u32 shift)
{
init_sched_clock(cd, update, bits, rate);
if (cd->mult != mult || cd->shift != shift) {
pr_crit("sched_clock: wrong multiply/shift: %u>>%u vs calculated %u>>%u\n"
"sched_clock: fix multiply/shift to avoid scheduler hiccups\n",
mult, shift, cd->mult, cd->shift);
}
}
#endif
arch/arm/include/asm/smp.h
View file @ 3c0cb7c3
......@@ -33,27 +33,23 @@ struct seq_file;
/*
* generate IPI list text
*/
extern void show_ipi_list(struct seq_file *p);
extern void show_ipi_list(struct seq_file *, int);
/*
* Called from assembly code, this handles an IPI.
*/
asmlinkage void do_IPI(struct pt_regs *regs);
asmlinkage void do_IPI(int ipinr, struct pt_regs *regs);
/*
* Setup the set of possible CPUs (via set_cpu_possible)
*/
extern void smp_init_cpus(void);
/*
* Move global data into per-processor storage.
*/
extern void smp_store_cpu_info(unsigned int cpuid);
/*
* Raise an IPI cross call on CPUs in callmap.
*/
extern void smp_cross_call(const struct cpumask *mask);
extern void smp_cross_call(const struct cpumask *mask, int ipi);
/*
* Boot a secondary CPU, and assign it the specified idle task.
......@@ -72,6 +68,11 @@ asmlinkage void secondary_start_kernel(void);
*/
extern void platform_secondary_init(unsigned int cpu);
/*
* Initialize cpu_possible map, and enable coherency
*/
extern void platform_smp_prepare_cpus(unsigned int);
/*
* Initial data for bringing up a secondary CPU.
*/
......@@ -97,6 +98,6 @@ extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
/*
* show local interrupt info
*/
extern void show_local_irqs(struct seq_file *);
extern void show_local_irqs(struct seq_file *, int);
#endif /* ifndef __ASM_ARM_SMP_H */
arch/arm/include/asm/smp_mpidr.h deleted 100644 → 0
View file @ f70f5b9d
#ifndef ASMARM_SMP_MIDR_H
#define ASMARM_SMP_MIDR_H
#define hard_smp_processor_id() \
({ \
unsigned int cpunum; \
__asm__("\n" \
"1: mrc p15, 0, %0, c0, c0, 5\n" \
" .pushsection \".alt.smp.init\", \"a\"\n"\
" .long 1b\n" \
" mov %0, #0\n" \
" .popsection" \
: "=r" (cpunum)); \
cpunum &= 0x0F; \
})
#endif
arch/arm/include/asm/smp_twd.h
View file @ 3c0cb7c3
......@@ -22,7 +22,6 @@ struct clock_event_device;
extern void __iomem *twd_base;
void twd_timer_stop(void);
int twd_timer_ack(void);
void twd_timer_setup(struct clock_event_device *);
......
arch/arm/include/asm/system.h
View file @ 3c0cb7c3
......@@ -63,6 +63,11 @@
#include <asm/outercache.h>
#define __exception __attribute__((section(".exception.text")))
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
#define __exception_irq_entry __irq_entry
#else
#define __exception_irq_entry __exception
#endif
struct thread_info;
struct task_struct;
......@@ -119,6 +124,13 @@ extern unsigned int user_debug;
#define vectors_high() (0)
#endif
#if __LINUX_ARM_ARCH__ >= 7 || \
(__LINUX_ARM_ARCH__ == 6 && defined(CONFIG_CPU_32v6K))
#define sev() __asm__ __volatile__ ("sev" : : : "memory")
#define wfe() __asm__ __volatile__ ("wfe" : : : "memory")
#define wfi() __asm__ __volatile__ ("wfi" : : : "memory")
#endif
#if __LINUX_ARM_ARCH__ >= 7
#define isb() __asm__ __volatile__ ("isb" : : : "memory")
#define dsb() __asm__ __volatile__ ("dsb" : : : "memory")
......
arch/arm/include/asm/traps.h
View file @ 3c0cb7c3
......@@ -15,16 +15,37 @@ struct undef_hook {
void register_undef_hook(struct undef_hook *hook);
void unregister_undef_hook(struct undef_hook *hook);
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
static inline int __in_irqentry_text(unsigned long ptr)
{
extern char __irqentry_text_start[];
extern char __irqentry_text_end[];
return ptr >= (unsigned long)&__irqentry_text_start &&
ptr < (unsigned long)&__irqentry_text_end;
}
#else
static inline int __in_irqentry_text(unsigned long ptr)
{
return 0;
}
#endif
static inline int in_exception_text(unsigned long ptr)
{
extern char __exception_text_start[];
extern char __exception_text_end[];
int in;
return ptr >= (unsigned long)&__exception_text_start &&
in = ptr >= (unsigned long)&__exception_text_start &&
ptr < (unsigned long)&__exception_text_end;
return in ? : __in_irqentry_text(ptr);
}
extern void __init early_trap_init(void);
extern void dump_backtrace_entry(unsigned long where, unsigned long from, unsigned long frame);
extern void *vectors_page;
#endif
arch/arm/include/asm/uaccess.h
View file @ 3c0cb7c3
......@@ -227,7 +227,7 @@ do { \
#define __get_user_asm_byte(x,addr,err) \
__asm__ __volatile__( \
"1: ldrbt %1,[%2]\n" \
"1: " T(ldrb) " %1,[%2],#0\n" \
"2:\n" \
" .pushsection .fixup,\"ax\"\n" \
" .align 2\n" \
......@@ -263,7 +263,7 @@ do { \
#define __get_user_asm_word(x,addr,err) \
__asm__ __volatile__( \
"1: ldrt %1,[%2]\n" \
"1: " T(ldr) " %1,[%2],#0\n" \
"2:\n" \
" .pushsection .fixup,\"ax\"\n" \
" .align 2\n" \
......@@ -308,7 +308,7 @@ do { \
#define __put_user_asm_byte(x,__pu_addr,err) \
__asm__ __volatile__( \
"1: strbt %1,[%2]\n" \
"1: " T(strb) " %1,[%2],#0\n" \
"2:\n" \
" .pushsection .fixup,\"ax\"\n" \
" .align 2\n" \
......@@ -341,7 +341,7 @@ do { \
#define __put_user_asm_word(x,__pu_addr,err) \
__asm__ __volatile__( \
"1: strt %1,[%2]\n" \
"1: " T(str) " %1,[%2],#0\n" \
"2:\n" \
" .pushsection .fixup,\"ax\"\n" \
" .align 2\n" \
......@@ -366,10 +366,10 @@ do { \
#define __put_user_asm_dword(x,__pu_addr,err) \
__asm__ __volatile__( \
ARM( "1: strt " __reg_oper1 ", [%1], #4\n" ) \
ARM( "2: strt " __reg_oper0 ", [%1]\n" ) \
THUMB( "1: strt " __reg_oper1 ", [%1]\n" ) \
THUMB( "2: strt " __reg_oper0 ", [%1, #4]\n" ) \
ARM( "1: " T(str) " " __reg_oper1 ", [%1], #4\n" ) \
ARM( "2: " T(str) " " __reg_oper0 ", [%1]\n" ) \
THUMB( "1: " T(str) " " __reg_oper1 ", [%1]\n" ) \
THUMB( "2: " T(str) " " __reg_oper0 ", [%1, #4]\n" ) \
"3:\n" \
" .pushsection .fixup,\"ax\"\n" \
" .align 2\n" \
......
arch/arm/kernel/Makefile
View file @ 3c0cb7c3
......@@ -5,7 +5,7 @@
CPPFLAGS_vmlinux.lds := -DTEXT_OFFSET=$(TEXT_OFFSET)
AFLAGS_head.o := -DTEXT_OFFSET=$(TEXT_OFFSET)
ifdef CONFIG_DYNAMIC_FTRACE
ifdef CONFIG_FUNCTION_TRACER
CFLAGS_REMOVE_ftrace.o = -pg
endif
......@@ -29,10 +29,12 @@ obj-$(CONFIG_MODULES) += armksyms.o module.o
obj-$(CONFIG_ARTHUR) += arthur.o
obj-$(CONFIG_ISA_DMA) += dma-isa.o
obj-$(CONFIG_PCI) += bios32.o isa.o
obj-$(CONFIG_SMP) += smp.o
obj-$(CONFIG_HAVE_SCHED_CLOCK) += sched_clock.o
obj-$(CONFIG_SMP) += smp.o smp_tlb.o
obj-$(CONFIG_HAVE_ARM_SCU) += smp_scu.o
obj-$(CONFIG_HAVE_ARM_TWD) += smp_twd.o
obj-$(CONFIG_DYNAMIC_FTRACE) += ftrace.o
obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o
obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o
obj-$(CONFIG_KPROBES) += kprobes.o kprobes-decode.o
obj-$(CONFIG_ATAGS_PROC) += atags.o
......@@ -42,6 +44,8 @@ obj-$(CONFIG_KGDB) += kgdb.o
obj-$(CONFIG_ARM_UNWIND) += unwind.o
obj-$(CONFIG_HAVE_TCM) += tcm.o
obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
obj-$(CONFIG_SWP_EMULATE) += swp_emulate.o
CFLAGS_swp_emulate.o := -Wa,-march=armv7-a
obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o
obj-$(CONFIG_CRUNCH) += crunch.o crunch-bits.o
......@@ -50,6 +54,7 @@ AFLAGS_crunch-bits.o := -Wa,-mcpu=ep9312
obj-$(CONFIG_CPU_XSCALE) += xscale-cp0.o
obj-$(CONFIG_CPU_XSC3) += xscale-cp0.o
obj-$(CONFIG_CPU_MOHAWK) += xscale-cp0.o
obj-$(CONFIG_CPU_PJ4) += pj4-cp0.o
obj-$(CONFIG_IWMMXT) += iwmmxt.o
obj-$(CONFIG_CPU_HAS_PMU) += pmu.o
obj-$(CONFIG_HW_PERF_EVENTS) += perf_event.o
......
arch/arm/kernel/entry-armv.S
View file @ 3c0cb7c3
......@@ -25,42 +25,22 @@
#include <asm/tls.h>
#include "entry-header.S"
#include <asm/entry-macro-multi.S>
/*
* Interrupt handling. Preserves r7, r8, r9
*/
.macro irq_handler
get_irqnr_preamble r5, lr
1: get_irqnr_and_base r0, r6, r5, lr
movne r1, sp
@
@ routine called with r0 = irq number, r1 = struct pt_regs *
@
adrne lr, BSYM(1b)
bne asm_do_IRQ
#ifdef CONFIG_SMP
/*
* XXX
*
* this macro assumes that irqstat (r6) and base (r5) are
* preserved from get_irqnr_and_base above
*/
ALT_SMP(test_for_ipi r0, r6, r5, lr)
ALT_UP_B(9997f)
movne r0, sp
adrne lr, BSYM(1b)
bne do_IPI
#ifdef CONFIG_LOCAL_TIMERS
test_for_ltirq r0, r6, r5, lr
movne r0, sp
adrne lr, BSYM(1b)
bne do_local_timer
#ifdef CONFIG_MULTI_IRQ_HANDLER
ldr r5, =handle_arch_irq
mov r0, sp
ldr r5, [r5]
adr lr, BSYM(9997f)
teq r5, #0
movne pc, r5
#endif
arch_irq_handler_default
9997:
#endif
.endm
#ifdef CONFIG_KPROBES
......@@ -198,6 +178,7 @@ __dabt_svc:
@
@ set desired IRQ state, then call main handler
@
debug_entry r1
msr cpsr_c, r9
mov r2, sp
bl do_DataAbort
......@@ -324,6 +305,7 @@ __pabt_svc:
#else
bl CPU_PABORT_HANDLER
#endif
debug_entry r1
msr cpsr_c, r9 @ Maybe enable interrupts
mov r2, sp @ regs
bl do_PrefetchAbort @ call abort handler
......@@ -439,6 +421,7 @@ __dabt_usr:
@
@ IRQs on, then call the main handler
@
debug_entry r1
enable_irq
mov r2, sp
adr lr, BSYM(ret_from_exception)
......@@ -703,6 +686,7 @@ __pabt_usr:
#else
bl CPU_PABORT_HANDLER
#endif
debug_entry r1
enable_irq @ Enable interrupts
mov r2, sp @ regs
bl do_PrefetchAbort @ call abort handler
......@@ -735,7 +719,7 @@ ENTRY(__switch_to)
THUMB( stmia ip!, {r4 - sl, fp} ) @ Store most regs on stack
THUMB( str sp, [ip], #4 )
THUMB( str lr, [ip], #4 )
#ifdef CONFIG_MMU
#ifdef CONFIG_CPU_USE_DOMAINS
ldr r6, [r2, #TI_CPU_DOMAIN]
#endif
set_tls r3, r4, r5
......@@ -744,7 +728,7 @@ ENTRY(__switch_to)
ldr r8, =__stack_chk_guard
ldr r7, [r7, #TSK_STACK_CANARY]
#endif
#ifdef CONFIG_MMU
#ifdef CONFIG_CPU_USE_DOMAINS
mcr p15, 0, r6, c3, c0, 0 @ Set domain register
#endif
mov r5, r0
......@@ -842,7 +826,7 @@ __kuser_helper_start:
*/
__kuser_memory_barrier: @ 0xffff0fa0
smp_dmb
smp_dmb arm
usr_ret lr
.align 5
......@@ -959,7 +943,7 @@ kuser_cmpxchg_fixup:
#else
smp_dmb
smp_dmb arm
1: ldrex r3, [r2]
subs r3, r3, r0
strexeq r3, r1, [r2]
......@@ -1245,3 +1229,9 @@ cr_alignment:
.space 4
cr_no_alignment:
.space 4
#ifdef CONFIG_MULTI_IRQ_HANDLER
.globl handle_arch_irq
handle_arch_irq:
.space 4
#endif
arch/arm/kernel/entry-common.S
View file @ 3c0cb7c3
......@@ -147,98 +147,170 @@ ENDPROC(ret_from_fork)
#endif
#endif
#ifdef CONFIG_DYNAMIC_FTRACE
ENTRY(__gnu_mcount_nc)
mov ip, lr
ldmia sp!, {lr}
mov pc, ip
ENDPROC(__gnu_mcount_nc)
.macro __mcount suffix
mcount_enter
ldr r0, =ftrace_trace_function
ldr r2, [r0]
adr r0, .Lftrace_stub
cmp r0, r2
bne 1f
ENTRY(ftrace_caller)
stmdb sp!, {r0-r3, lr}
mov r0, lr
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
ldr r1, =ftrace_graph_return
ldr r2, [r1]
cmp r0, r2
bne ftrace_graph_caller\suffix
ldr r1, =ftrace_graph_entry
ldr r2, [r1]
ldr r0, =ftrace_graph_entry_stub
cmp r0, r2
bne ftrace_graph_caller\suffix
#endif
mcount_exit
1: mcount_get_lr r1 @ lr of instrumented func
mov r0, lr @ instrumented function
sub r0, r0, #MCOUNT_INSN_SIZE
adr lr, BSYM(2f)
mov pc, r2
2: mcount_exit
.endm
.macro __ftrace_caller suffix
mcount_enter
mcount_get_lr r1 @ lr of instrumented func
mov r0, lr @ instrumented function
sub r0, r0, #MCOUNT_INSN_SIZE
ldr r1, [sp, #20]
.global ftrace_call
ftrace_call:
.globl ftrace_call\suffix
ftrace_call\suffix:
bl ftrace_stub
ldmia sp!, {r0-r3, ip, lr}
mov pc, ip
ENDPROC(ftrace_caller)
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
.globl ftrace_graph_call\suffix
ftrace_graph_call\suffix:
mov r0, r0
#endif
mcount_exit
.endm
.macro __ftrace_graph_caller
sub r0, fp, #4 @ &lr of instrumented routine (&parent)
#ifdef CONFIG_DYNAMIC_FTRACE
@ called from __ftrace_caller, saved in mcount_enter
ldr r1, [sp, #16] @ instrumented routine (func)
#else
@ called from __mcount, untouched in lr
mov r1, lr @ instrumented routine (func)
#endif
sub r1, r1, #MCOUNT_INSN_SIZE
mov r2, fp @ frame pointer
bl prepare_ftrace_return
mcount_exit
.endm
#ifdef CONFIG_OLD_MCOUNT
/*
* mcount
*/
.macro mcount_enter
stmdb sp!, {r0-r3, lr}
.endm
.macro mcount_get_lr reg
ldr \reg, [fp, #-4]
.endm
.macro mcount_exit
ldr lr, [fp, #-4]
ldmia sp!, {r0-r3, pc}
.endm
ENTRY(mcount)
#ifdef CONFIG_DYNAMIC_FTRACE
stmdb sp!, {lr}
ldr lr, [fp, #-4]
ldmia sp!, {pc}
#else
__mcount _old
#endif
ENDPROC(mcount)
#ifdef CONFIG_DYNAMIC_FTRACE
ENTRY(ftrace_caller_old)
stmdb sp!, {r0-r3, lr}
ldr r1, [fp, #-4]
mov r0, lr
sub r0, r0, #MCOUNT_INSN_SIZE
.globl ftrace_call_old
ftrace_call_old:
bl ftrace_stub
ldr lr, [fp, #-4] @ restore lr
ldmia sp!, {r0-r3, pc}
__ftrace_caller _old
ENDPROC(ftrace_caller_old)
#endif
#else
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
ENTRY(ftrace_graph_caller_old)
__ftrace_graph_caller
ENDPROC(ftrace_graph_caller_old)
#endif
ENTRY(__gnu_mcount_nc)
.purgem mcount_enter
.purgem mcount_get_lr
.purgem mcount_exit
#endif
/*
* __gnu_mcount_nc
*/
.macro mcount_enter
stmdb sp!, {r0-r3, lr}
ldr r0, =ftrace_trace_function
ldr r2, [r0]
adr r0, .Lftrace_stub
cmp r0, r2
bne gnu_trace
.endm
.macro mcount_get_lr reg
ldr \reg, [sp, #20]
.endm
.macro mcount_exit
ldmia sp!, {r0-r3, ip, lr}
mov pc, ip
.endm
gnu_trace:
ldr r1, [sp, #20] @ lr of instrumented routine
mov r0, lr
sub r0, r0, #MCOUNT_INSN_SIZE
adr lr, BSYM(1f)
mov pc, r2
1:
ldmia sp!, {r0-r3, ip, lr}
ENTRY(__gnu_mcount_nc)
#ifdef CONFIG_DYNAMIC_FTRACE
mov ip, lr
ldmia sp!, {lr}
mov pc, ip
#else
__mcount
#endif
ENDPROC(__gnu_mcount_nc)
#ifdef CONFIG_OLD_MCOUNT
/*
* This is under an ifdef in order to force link-time errors for people trying
* to build with !FRAME_POINTER with a GCC which doesn't use the new-style
* mcount.
*/
ENTRY(mcount)
stmdb sp!, {r0-r3, lr}
ldr r0, =ftrace_trace_function
ldr r2, [r0]
adr r0, ftrace_stub
cmp r0, r2
bne trace
ldr lr, [fp, #-4] @ restore lr
ldmia sp!, {r0-r3, pc}
#ifdef CONFIG_DYNAMIC_FTRACE
ENTRY(ftrace_caller)
__ftrace_caller
ENDPROC(ftrace_caller)
#endif
trace:
ldr r1, [fp, #-4] @ lr of instrumented routine
mov r0, lr
sub r0, r0, #MCOUNT_INSN_SIZE
mov lr, pc
mov pc, r2
ldr lr, [fp, #-4] @ restore lr
ldmia sp!, {r0-r3, pc}
ENDPROC(mcount)
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
ENTRY(ftrace_graph_caller)
__ftrace_graph_caller
ENDPROC(ftrace_graph_caller)
#endif
#endif /* CONFIG_DYNAMIC_FTRACE */
.purgem mcount_enter
.purgem mcount_get_lr
.purgem mcount_exit
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
.globl return_to_handler
return_to_handler:
stmdb sp!, {r0-r3}
mov r0, fp @ frame pointer
bl ftrace_return_to_handler
mov lr, r0 @ r0 has real ret addr
ldmia sp!, {r0-r3}
mov pc, lr
#endif
ENTRY(ftrace_stub)
.Lftrace_stub:
......
arch/arm/kernel/entry-header.S
View file @ 3c0cb7c3
......@@ -165,6 +165,25 @@
.endm
#endif /* !CONFIG_THUMB2_KERNEL */
@
@ Debug exceptions are taken as prefetch or data aborts.
@ We must disable preemption during the handler so that
@ we can access the debug registers safely.
@
.macro debug_entry, fsr
#if defined(CONFIG_HAVE_HW_BREAKPOINT) && defined(CONFIG_PREEMPT)
ldr r4, =0x40f @ mask out fsr.fs
and r5, r4, \fsr
cmp r5, #2 @ debug exception
bne 1f
get_thread_info r10
ldr r6, [r10, #TI_PREEMPT] @ get preempt count
add r11, r6, #1 @ increment it
str r11, [r10, #TI_PREEMPT]
1:
#endif
.endm
/*
* These are the registers used in the syscall handler, and allow us to
* have in theory up to 7 arguments to a function - r0 to r6.
......
arch/arm/kernel/fiq.c
View file @ 3c0cb7c3
......@@ -45,6 +45,7 @@
#include <asm/fiq.h>
#include <asm/irq.h>
#include <asm/system.h>
#include <asm/traps.h>
static unsigned long no_fiq_insn;
......@@ -67,17 +68,22 @@ static struct fiq_handler default_owner = {
static struct fiq_handler *current_fiq = &default_owner;
int show_fiq_list(struct seq_file *p, void *v)
int show_fiq_list(struct seq_file *p, int prec)
{
if (current_fiq != &default_owner)
seq_printf(p, "FIQ: %s\n", current_fiq->name);
seq_printf(p, "%*s: %s\n", prec, "FIQ",
current_fiq->name);
return 0;
}
void set_fiq_handler(void *start, unsigned int length)
{
#if defined(CONFIG_CPU_USE_DOMAINS)
memcpy((void *)0xffff001c, start, length);
#else
memcpy(vectors_page + 0x1c, start, length);
#endif
flush_icache_range(0xffff001c, 0xffff001c + length);
if (!vectors_high())
flush_icache_range(0x1c, 0x1c + length);
......
arch/arm/kernel/ftrace.c
View file @ 3c0cb7c3
......@@ -24,6 +24,7 @@
#define NOP 0xe8bd4000 /* pop {lr} */
#endif
#ifdef CONFIG_DYNAMIC_FTRACE
#ifdef CONFIG_OLD_MCOUNT
#define OLD_MCOUNT_ADDR ((unsigned long) mcount)
#define OLD_FTRACE_ADDR ((unsigned long) ftrace_caller_old)
......@@ -59,9 +60,9 @@ static unsigned long adjust_address(struct dyn_ftrace *rec, unsigned long addr)
}
#endif
/* construct a branch (BL) instruction to addr */
#ifdef CONFIG_THUMB2_KERNEL
static unsigned long ftrace_call_replace(unsigned long pc, unsigned long addr)
static unsigned long ftrace_gen_branch(unsigned long pc, unsigned long addr,
bool link)
{
unsigned long s, j1, j2, i1, i2, imm10, imm11;
unsigned long first, second;
......@@ -83,15 +84,22 @@ static unsigned long ftrace_call_replace(unsigned long pc, unsigned long addr)
j2 = (!i2) ^ s;
first = 0xf000 | (s << 10) | imm10;
second = 0xd000 | (j1 << 13) | (j2 << 11) | imm11;
second = 0x9000 | (j1 << 13) | (j2 << 11) | imm11;
if (link)
second |= 1 << 14;
return (second << 16) | first;
}
#else
static unsigned long ftrace_call_replace(unsigned long pc, unsigned long addr)
static unsigned long ftrace_gen_branch(unsigned long pc, unsigned long addr,
bool link)
{
unsigned long opcode = 0xea000000;
long offset;
if (link)
opcode |= 1 << 24;
offset = (long)addr - (long)(pc + 8);
if (unlikely(offset < -33554432 || offset > 33554428)) {
/* Can't generate branches that far (from ARM ARM). Ftrace
......@@ -103,10 +111,15 @@ static unsigned long ftrace_call_replace(unsigned long pc, unsigned long addr)
offset = (offset >> 2) & 0x00ffffff;
return 0xeb000000 | offset;
return opcode | offset;
}
#endif
static unsigned long ftrace_call_replace(unsigned long pc, unsigned long addr)
{
return ftrace_gen_branch(pc, addr, true);
}
static int ftrace_modify_code(unsigned long pc, unsigned long old,
unsigned long new)
{
......@@ -193,3 +206,83 @@ int __init ftrace_dyn_arch_init(void *data)
return 0;
}
#endif /* CONFIG_DYNAMIC_FTRACE */
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr,
unsigned long frame_pointer)
{
unsigned long return_hooker = (unsigned long) &return_to_handler;
struct ftrace_graph_ent trace;
unsigned long old;
int err;
if (unlikely(atomic_read(&current->tracing_graph_pause)))
return;
old = *parent;
*parent = return_hooker;
err = ftrace_push_return_trace(old, self_addr, &trace.depth,
frame_pointer);
if (err == -EBUSY) {
*parent = old;
return;
}
trace.func = self_addr;
/* Only trace if the calling function expects to */
if (!ftrace_graph_entry(&trace)) {
current->curr_ret_stack--;
*parent = old;
}
}
#ifdef CONFIG_DYNAMIC_FTRACE
extern unsigned long ftrace_graph_call;
extern unsigned long ftrace_graph_call_old;
extern void ftrace_graph_caller_old(void);
static int __ftrace_modify_caller(unsigned long *callsite,
void (*func) (void), bool enable)
{
unsigned long caller_fn = (unsigned long) func;
unsigned long pc = (unsigned long) callsite;
unsigned long branch = ftrace_gen_branch(pc, caller_fn, false);
unsigned long nop = 0xe1a00000; /* mov r0, r0 */
unsigned long old = enable ? nop : branch;
unsigned long new = enable ? branch : nop;
return ftrace_modify_code(pc, old, new);
}
static int ftrace_modify_graph_caller(bool enable)
{
int ret;
ret = __ftrace_modify_caller(&ftrace_graph_call,
ftrace_graph_caller,
enable);
#ifdef CONFIG_OLD_MCOUNT
if (!ret)
ret = __ftrace_modify_caller(&ftrace_graph_call_old,
ftrace_graph_caller_old,
enable);
#endif
return ret;
}
int ftrace_enable_ftrace_graph_caller(void)
{
return ftrace_modify_graph_caller(true);
}
int ftrace_disable_ftrace_graph_caller(void)
{
return ftrace_modify_graph_caller(false);
}
#endif /* CONFIG_DYNAMIC_FTRACE */
#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
arch/arm/kernel/head.S
View file @ 3c0cb7c3
......@@ -91,6 +91,11 @@ ENTRY(stext)
movs r8, r5 @ invalid machine (r5=0)?
THUMB( it eq ) @ force fixup-able long branch encoding
beq __error_a @ yes, error 'a'
/*
* r1 = machine no, r2 = atags,
* r8 = machinfo, r9 = cpuid, r10 = procinfo
*/
bl __vet_atags
#ifdef CONFIG_SMP_ON_UP
bl __fixup_smp
......@@ -387,19 +392,19 @@ ENDPROC(__turn_mmu_on)
#ifdef CONFIG_SMP_ON_UP
__fixup_smp:
mov r7, #0x00070000
orr r6, r7, #0xff000000 @ mask 0xff070000
orr r7, r7, #0x41000000 @ val 0x41070000
and r0, r9, r6
teq r0, r7 @ ARM CPU and ARMv6/v7?
mov r4, #0x00070000
orr r3, r4, #0xff000000 @ mask 0xff070000
orr r4, r4, #0x41000000 @ val 0x41070000
and r0, r9, r3
teq r0, r4 @ ARM CPU and ARMv6/v7?
bne __fixup_smp_on_up @ no, assume UP
orr r6, r6, #0x0000ff00
orr r6, r6, #0x000000f0 @ mask 0xff07fff0
orr r7, r7, #0x0000b000
orr r7, r7, #0x00000020 @ val 0x4107b020
and r0, r9, r6
teq r0, r7 @ ARM 11MPCore?
orr r3, r3, #0x0000ff00
orr r3, r3, #0x000000f0 @ mask 0xff07fff0
orr r4, r4, #0x0000b000
orr r4, r4, #0x00000020 @ val 0x4107b020
and r0, r9, r3
teq r0, r4 @ ARM 11MPCore?
moveq pc, lr @ yes, assume SMP
mrc p15, 0, r0, c0, c0, 5 @ read MPIDR
......@@ -408,15 +413,22 @@ __fixup_smp:
__fixup_smp_on_up:
adr r0, 1f
ldmia r0, {r3, r6, r7}
ldmia r0, {r3 - r5}
sub r3, r0, r3
add r6, r6, r3
add r7, r7, r3
2: cmp r6, r7
ldmia r6!, {r0, r4}
strlo r4, [r0, r3]
blo 2b
mov pc, lr
add r4, r4, r3
add r5, r5, r3
2: cmp r4, r5
movhs pc, lr
ldmia r4!, {r0, r6}
ARM( str r6, [r0, r3] )
THUMB( add r0, r0, r3 )
#ifdef __ARMEB__
THUMB( mov r6, r6, ror #16 ) @ Convert word order for big-endian.
#endif
THUMB( strh r6, [r0], #2 ) @ For Thumb-2, store as two halfwords
THUMB( mov r6, r6, lsr #16 ) @ to be robust against misaligned r3.
THUMB( strh r6, [r0] )
b 2b
ENDPROC(__fixup_smp)
.align
......
arch/arm/kernel/hw_breakpoint.c
View file @ 3c0cb7c3
This diff is collapsed.
arch/arm/kernel/irq.c
View file @ 3c0cb7c3
......@@ -35,8 +35,10 @@
#include <linux/list.h>
#include <linux/kallsyms.h>
#include <linux/proc_fs.h>
#include <linux/ftrace.h>
#include <asm/system.h>
#include <asm/mach/arch.h>
#include <asm/mach/irq.h>
#include <asm/mach/time.h>
......@@ -47,8 +49,6 @@
#define irq_finish(irq) do { } while (0)
#endif
unsigned int arch_nr_irqs;
void (*init_arch_irq)(void) __initdata = NULL;
unsigned long irq_err_count;
int show_interrupts(struct seq_file *p, void *v)
......@@ -57,11 +57,20 @@ int show_interrupts(struct seq_file *p, void *v)
struct irq_desc *desc;
struct irqaction * action;
unsigned long flags;
int prec, n;
for (prec = 3, n = 1000; prec < 10 && n <= nr_irqs; prec++)
n *= 10;
#ifdef CONFIG_SMP
if (prec < 4)
prec = 4;
#endif
if (i == 0) {
char cpuname[12];
seq_printf(p, " ");
seq_printf(p, "%*s ", prec, "");
for_each_present_cpu(cpu) {
sprintf(cpuname, "CPU%d", cpu);
seq_printf(p, " %10s", cpuname);
......@@ -76,7 +85,7 @@ int show_interrupts(struct seq_file *p, void *v)
if (!action)
goto unlock;
seq_printf(p, "%3d: ", i);
seq_printf(p, "%*d: ", prec, i);
for_each_present_cpu(cpu)
seq_printf(p, "%10u ", kstat_irqs_cpu(i, cpu));
seq_printf(p, " %10s", desc->chip->name ? : "-");
......@@ -89,13 +98,15 @@ int show_interrupts(struct seq_file *p, void *v)
raw_spin_unlock_irqrestore(&desc->lock, flags);
} else if (i == nr_irqs) {
#ifdef CONFIG_FIQ
show_fiq_list(p, v);
show_fiq_list(p, prec);
#endif
#ifdef CONFIG_SMP
show_ipi_list(p);
show_local_irqs(p);
show_ipi_list(p, prec);
#endif
#ifdef CONFIG_LOCAL_TIMERS
show_local_irqs(p, prec);
#endif
seq_printf(p, "Err: %10lu\n", irq_err_count);
seq_printf(p, "%*s: %10lu\n", prec, "Err", irq_err_count);
}
return 0;
}
......@@ -105,7 +116,8 @@ int show_interrupts(struct seq_file *p, void *v)
* come via this function. Instead, they should provide their
* own 'handler'
*/
asmlinkage void __exception asm_do_IRQ(unsigned int irq, struct pt_regs *regs)
asmlinkage void __exception_irq_entry
asm_do_IRQ(unsigned int irq, struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
......@@ -154,13 +166,13 @@ void set_irq_flags(unsigned int irq, unsigned int iflags)
void __init init_IRQ(void)
{
init_arch_irq();
machine_desc->init_irq();
}
#ifdef CONFIG_SPARSE_IRQ
int __init arch_probe_nr_irqs(void)
{
nr_irqs = arch_nr_irqs ? arch_nr_irqs : NR_IRQS;
nr_irqs = machine_desc->nr_irqs ? machine_desc->nr_irqs : NR_IRQS;
return nr_irqs;
}
#endif
......
arch/arm/kernel/iwmmxt.S
View file @ 3c0cb7c3
......@@ -19,6 +19,14 @@
#include <asm/thread_info.h>
#include <asm/asm-offsets.h>
#if defined(CONFIG_CPU_PJ4)
#define PJ4(code...) code
#define XSC(code...)
#else
#define PJ4(code...)
#define XSC(code...) code
#endif
#define MMX_WR0 (0x00)
#define MMX_WR1 (0x08)
#define MMX_WR2 (0x10)
......@@ -58,11 +66,17 @@
ENTRY(iwmmxt_task_enable)
mrc p15, 0, r2, c15, c1, 0
tst r2, #0x3 @ CP0 and CP1 accessible?
XSC(mrc p15, 0, r2, c15, c1, 0)
PJ4(mrc p15, 0, r2, c1, c0, 2)
@ CP0 and CP1 accessible?
XSC(tst r2, #0x3)
PJ4(tst r2, #0xf)
movne pc, lr @ if so no business here
orr r2, r2, #0x3 @ enable access to CP0 and CP1
mcr p15, 0, r2, c15, c1, 0
@ enable access to CP0 and CP1
XSC(orr r2, r2, #0x3)
XSC(mcr p15, 0, r2, c15, c1, 0)
PJ4(orr r2, r2, #0xf)
PJ4(mcr p15, 0, r2, c1, c0, 2)
ldr r3, =concan_owner
add r0, r10, #TI_IWMMXT_STATE @ get task Concan save area
......@@ -179,17 +193,26 @@ ENTRY(iwmmxt_task_disable)
teqne r1, r2 @ or specified one?
bne 1f @ no: quit
mrc p15, 0, r4, c15, c1, 0
orr r4, r4, #0x3 @ enable access to CP0 and CP1
mcr p15, 0, r4, c15, c1, 0
@ enable access to CP0 and CP1
XSC(mrc p15, 0, r4, c15, c1, 0)
XSC(orr r4, r4, #0xf)
XSC(mcr p15, 0, r4, c15, c1, 0)
PJ4(mrc p15, 0, r4, c1, c0, 2)
PJ4(orr r4, r4, #0x3)
PJ4(mcr p15, 0, r4, c1, c0, 2)
mov r0, #0 @ nothing to load
str r0, [r3] @ no more current owner
mrc p15, 0, r2, c2, c0, 0
mov r2, r2 @ cpwait
bl concan_save
bic r4, r4, #0x3 @ disable access to CP0 and CP1
mcr p15, 0, r4, c15, c1, 0
@ disable access to CP0 and CP1
XSC(bic r4, r4, #0x3)
XSC(mcr p15, 0, r4, c15, c1, 0)
PJ4(bic r4, r4, #0xf)
PJ4(mcr p15, 0, r4, c1, c0, 2)
mrc p15, 0, r2, c2, c0, 0
mov r2, r2 @ cpwait
......@@ -277,8 +300,11 @@ ENTRY(iwmmxt_task_restore)
*/
ENTRY(iwmmxt_task_switch)
mrc p15, 0, r1, c15, c1, 0
tst r1, #0x3 @ CP0 and CP1 accessible?
XSC(mrc p15, 0, r1, c15, c1, 0)
PJ4(mrc p15, 0, r1, c1, c0, 2)
@ CP0 and CP1 accessible?
XSC(tst r1, #0x3)
PJ4(tst r1, #0xf)
bne 1f @ yes: block them for next task
ldr r2, =concan_owner
......@@ -287,8 +313,11 @@ ENTRY(iwmmxt_task_switch)
teq r2, r3 @ next task owns it?
movne pc, lr @ no: leave Concan disabled
1: eor r1, r1, #3 @ flip Concan access
mcr p15, 0, r1, c15, c1, 0
1: @ flip Conan access
XSC(eor r1, r1, #0x3)
XSC(mcr p15, 0, r1, c15, c1, 0)
PJ4(eor r1, r1, #0xf)
PJ4(mcr p15, 0, r1, c1, c0, 2)
mrc p15, 0, r1, c2, c0, 0
sub pc, lr, r1, lsr #32 @ cpwait and return
......
arch/arm/kernel/machine_kexec.c
View file @ 3c0cb7c3
......@@ -23,6 +23,8 @@ extern unsigned long kexec_indirection_page;
extern unsigned long kexec_mach_type;
extern unsigned long kexec_boot_atags;
static atomic_t waiting_for_crash_ipi;
/*
* Provide a dummy crash_notes definition while crash dump arrives to arm.
* This prevents breakage of crash_notes attribute in kernel/ksysfs.c.
......@@ -37,9 +39,37 @@ void machine_kexec_cleanup(struct kimage *image)
{
}
void machine_crash_nonpanic_core(void *unused)
{
struct pt_regs regs;
crash_setup_regs(&regs, NULL);
printk(KERN_DEBUG "CPU %u will stop doing anything useful since another CPU has crashed\n",
smp_processor_id());
crash_save_cpu(&regs, smp_processor_id());
flush_cache_all();
atomic_dec(&waiting_for_crash_ipi);
while (1)
cpu_relax();
}
void machine_crash_shutdown(struct pt_regs *regs)
{
unsigned long msecs;
local_irq_disable();
atomic_set(&waiting_for_crash_ipi, num_online_cpus() - 1);
smp_call_function(machine_crash_nonpanic_core, NULL, false);
msecs = 1000; /* Wait at most a second for the other cpus to stop */
while ((atomic_read(&waiting_for_crash_ipi) > 0) && msecs) {
mdelay(1);
msecs--;
}
if (atomic_read(&waiting_for_crash_ipi) > 0)
printk(KERN_WARNING "Non-crashing CPUs did not react to IPI\n");
crash_save_cpu(regs, smp_processor_id());
printk(KERN_INFO "Loading crashdump kernel...\n");
......
arch/arm/kernel/module.c
View file @ 3c0cb7c3
......@@ -67,35 +67,6 @@ int module_frob_arch_sections(Elf_Ehdr *hdr,
char *secstrings,
struct module *mod)
{
#ifdef CONFIG_ARM_UNWIND
Elf_Shdr *s, *sechdrs_end = sechdrs + hdr->e_shnum;
struct arm_unwind_mapping *maps = mod->arch.map;
for (s = sechdrs; s < sechdrs_end; s++) {
char const *secname = secstrings + s->sh_name;
if (strcmp(".ARM.exidx.init.text", secname) == 0)
maps[ARM_SEC_INIT].unw_sec = s;
else if (strcmp(".ARM.exidx.devinit.text", secname) == 0)
maps[ARM_SEC_DEVINIT].unw_sec = s;
else if (strcmp(".ARM.exidx", secname) == 0)
maps[ARM_SEC_CORE].unw_sec = s;
else if (strcmp(".ARM.exidx.exit.text", secname) == 0)
maps[ARM_SEC_EXIT].unw_sec = s;
else if (strcmp(".ARM.exidx.devexit.text", secname) == 0)
maps[ARM_SEC_DEVEXIT].unw_sec = s;
else if (strcmp(".init.text", secname) == 0)
maps[ARM_SEC_INIT].sec_text = s;
else if (strcmp(".devinit.text", secname) == 0)
maps[ARM_SEC_DEVINIT].sec_text = s;
else if (strcmp(".text", secname) == 0)
maps[ARM_SEC_CORE].sec_text = s;
else if (strcmp(".exit.text", secname) == 0)
maps[ARM_SEC_EXIT].sec_text = s;
else if (strcmp(".devexit.text", secname) == 0)
maps[ARM_SEC_DEVEXIT].sec_text = s;
}
#endif
return 0;
}
......@@ -300,41 +271,69 @@ apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab,
return -ENOEXEC;
}
#ifdef CONFIG_ARM_UNWIND
static void register_unwind_tables(struct module *mod)
struct mod_unwind_map {
const Elf_Shdr *unw_sec;
const Elf_Shdr *txt_sec;
};
int module_finalize(const Elf32_Ehdr *hdr, const Elf_Shdr *sechdrs,
struct module *mod)
{
#ifdef CONFIG_ARM_UNWIND
const char *secstrs = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
const Elf_Shdr *s, *sechdrs_end = sechdrs + hdr->e_shnum;
struct mod_unwind_map maps[ARM_SEC_MAX];
int i;
for (i = 0; i < ARM_SEC_MAX; ++i) {
struct arm_unwind_mapping *map = &mod->arch.map[i];
if (map->unw_sec && map->sec_text)
map->unwind = unwind_table_add(map->unw_sec->sh_addr,
map->unw_sec->sh_size,
map->sec_text->sh_addr,
map->sec_text->sh_size);
memset(maps, 0, sizeof(maps));
for (s = sechdrs; s < sechdrs_end; s++) {
const char *secname = secstrs + s->sh_name;
if (!(s->sh_flags & SHF_ALLOC))
continue;
if (strcmp(".ARM.exidx.init.text", secname) == 0)
maps[ARM_SEC_INIT].unw_sec = s;
else if (strcmp(".ARM.exidx.devinit.text", secname) == 0)
maps[ARM_SEC_DEVINIT].unw_sec = s;
else if (strcmp(".ARM.exidx", secname) == 0)
maps[ARM_SEC_CORE].unw_sec = s;
else if (strcmp(".ARM.exidx.exit.text", secname) == 0)
maps[ARM_SEC_EXIT].unw_sec = s;
else if (strcmp(".ARM.exidx.devexit.text", secname) == 0)
maps[ARM_SEC_DEVEXIT].unw_sec = s;
else if (strcmp(".init.text", secname) == 0)
maps[ARM_SEC_INIT].txt_sec = s;
else if (strcmp(".devinit.text", secname) == 0)
maps[ARM_SEC_DEVINIT].txt_sec = s;
else if (strcmp(".text", secname) == 0)
maps[ARM_SEC_CORE].txt_sec = s;
else if (strcmp(".exit.text", secname) == 0)
maps[ARM_SEC_EXIT].txt_sec = s;
else if (strcmp(".devexit.text", secname) == 0)
maps[ARM_SEC_DEVEXIT].txt_sec = s;
}
}
static void unregister_unwind_tables(struct module *mod)
{
int i = ARM_SEC_MAX;
while (--i >= 0)
unwind_table_del(mod->arch.map[i].unwind);
}
#else
static inline void register_unwind_tables(struct module *mod) { }
static inline void unregister_unwind_tables(struct module *mod) { }
for (i = 0; i < ARM_SEC_MAX; i++)
if (maps[i].unw_sec && maps[i].txt_sec)
mod->arch.unwind[i] =
unwind_table_add(maps[i].unw_sec->sh_addr,
maps[i].unw_sec->sh_size,
maps[i].txt_sec->sh_addr,
maps[i].txt_sec->sh_size);
#endif
int
module_finalize(const Elf32_Ehdr *hdr, const Elf_Shdr *sechdrs,
struct module *module)
{
register_unwind_tables(module);
return 0;
}
void
module_arch_cleanup(struct module *mod)
{
unregister_unwind_tables(mod);
#ifdef CONFIG_ARM_UNWIND
int i;
for (i = 0; i < ARM_SEC_MAX; i++)
if (mod->arch.unwind[i])
unwind_table_del(mod->arch.unwind[i]);
#endif
}
arch/arm/kernel/perf_event.c
View file @ 3c0cb7c3
This diff is collapsed.
arch/arm/kernel/perf_event_v6.c 0 → 100644
View file @ 3c0cb7c3
This diff is collapsed.
arch/arm/kernel/perf_event_v7.c 0 → 100644
View file @ 3c0cb7c3
This diff is collapsed.
arch/arm/kernel/perf_event_xscale.c 0 → 100644
View file @ 3c0cb7c3
This diff is collapsed.
arch/arm/kernel/pj4-cp0.c 0 → 100644
View file @ 3c0cb7c3
/*
* linux/arch/arm/kernel/pj4-cp0.c
*
* PJ4 iWMMXt coprocessor context switching and handling
*
* Copyright (c) 2010 Marvell International Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/init.h>
#include <linux/io.h>
#include <asm/thread_notify.h>
static int iwmmxt_do(struct notifier_block *self, unsigned long cmd, void *t)
{
struct thread_info *thread = t;
switch (cmd) {
case THREAD_NOTIFY_FLUSH:
/*
* flush_thread() zeroes thread->fpstate, so no need
* to do anything here.
*
* FALLTHROUGH: Ensure we don't try to overwrite our newly
* initialised state information on the first fault.
*/
case THREAD_NOTIFY_EXIT:
iwmmxt_task_release(thread);
break;
case THREAD_NOTIFY_SWITCH:
iwmmxt_task_switch(thread);
break;
}
return NOTIFY_DONE;
}
static struct notifier_block iwmmxt_notifier_block = {
.notifier_call = iwmmxt_do,
};
static u32 __init pj4_cp_access_read(void)
{
u32 value;
__asm__ __volatile__ (
"mrc p15, 0, %0, c1, c0, 2\n\t"
: "=r" (value));
return value;
}
static void __init pj4_cp_access_write(u32 value)
{
u32 temp;
__asm__ __volatile__ (
"mcr p15, 0, %1, c1, c0, 2\n\t"
"mrc p15, 0, %0, c1, c0, 2\n\t"
"mov %0, %0\n\t"
"sub pc, pc, #4\n\t"
: "=r" (temp) : "r" (value));
}
/*
* Disable CP0/CP1 on boot, and let call_fpe() and the iWMMXt lazy
* switch code handle iWMMXt context switching.
*/
static int __init pj4_cp0_init(void)
{
u32 cp_access;
cp_access = pj4_cp_access_read() & ~0xf;
pj4_cp_access_write(cp_access);
printk(KERN_INFO "PJ4 iWMMXt coprocessor enabled.\n");
elf_hwcap |= HWCAP_IWMMXT;
thread_register_notifier(&iwmmxt_notifier_block);
return 0;
}
late_initcall(pj4_cp0_init);
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/*
* sched_clock.c: support for extending counters to full 64-bit ns counter
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/clocksource.h>
#include <linux/init.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/timer.h>
#include <asm/sched_clock.h>
static void sched_clock_poll(unsigned long wrap_ticks);
static DEFINE_TIMER(sched_clock_timer, sched_clock_poll, 0, 0);
static void (*sched_clock_update_fn)(void);
static void sched_clock_poll(unsigned long wrap_ticks)
{
mod_timer(&sched_clock_timer, round_jiffies(jiffies + wrap_ticks));
sched_clock_update_fn();
}
void __init init_sched_clock(struct clock_data *cd, void (*update)(void),
unsigned int clock_bits, unsigned long rate)
{
unsigned long r, w;
u64 res, wrap;
char r_unit;
sched_clock_update_fn = update;
/* calculate the mult/shift to convert counter ticks to ns. */
clocks_calc_mult_shift(&cd->mult, &cd->shift, rate, NSEC_PER_SEC, 60);
r = rate;
if (r >= 4000000) {
r /= 1000000;
r_unit = 'M';
} else {
r /= 1000;
r_unit = 'k';
}
/* calculate how many ns until we wrap */
wrap = cyc_to_ns((1ULL << clock_bits) - 1, cd->mult, cd->shift);
do_div(wrap, NSEC_PER_MSEC);
w = wrap;
/* calculate the ns resolution of this counter */
res = cyc_to_ns(1ULL, cd->mult, cd->shift);
pr_info("sched_clock: %u bits at %lu%cHz, resolution %lluns, wraps every %lums\n",
clock_bits, r, r_unit, res, w);
/*
* Start the timer to keep sched_clock() properly updated and
* sets the initial epoch.
*/
sched_clock_timer.data = msecs_to_jiffies(w - (w / 10));
sched_clock_poll(sched_clock_timer.data);
/*
* Ensure that sched_clock() starts off at 0ns
*/
cd->epoch_ns = 0;
}
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......@@ -30,12 +30,13 @@
#include <asm/leds.h>
#include <asm/thread_info.h>
#include <asm/stacktrace.h>
#include <asm/mach/arch.h>
#include <asm/mach/time.h>
/*
* Our system timer.
*/
struct sys_timer *system_timer;
static struct sys_timer *system_timer;
#if defined(CONFIG_RTC_DRV_CMOS) || defined(CONFIG_RTC_DRV_CMOS_MODULE)
/* this needs a better home */
......@@ -160,6 +161,7 @@ device_initcall(timer_init_sysfs);
void __init time_init(void)
{
system_timer = machine_desc->timer;
system_timer->init();
}
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