[PATCH] alpha: lynx support

Forward port of Jay's 2.4 patch.
Also I've cleaned up EISA configury - we only need it for
systems with EISA.

Ivan.

arch/alpha/Kconfig

@@ -59,6 +59,7 @@ choice
 	  Jensen              DECpc 150, DEC 2000 model 300,
 	  DEC 2000 model 500
 	  LX164               AlphaPC164-LX
+	  Lynx                AS 2100A
 	  Miata               Personal Workstation 433a, 433au, 500a,
 	  500au, 600a, or 600au
 	  Marvel              AlphaServer ES47 / ES80 / GS1280
@@ -169,6 +170,11 @@ config ALPHA_LX164
 	  A technical overview of this board is available at
 	  <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
 
+config ALPHA_LYNX
+	bool "Lynx"
+	help
+	  AlphaServer 2100A-based systems.
+
 config ALPHA_MARVEL
 	bool "Marvel"
 	help
@@ -263,22 +269,6 @@ config ISA
 	  (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 	  newer boards don't support it.  If you have ISA, say Y, otherwise N.
 
-config EISA
-	bool
-	default y
-	---help---
-	  The Extended Industry Standard Architecture (EISA) bus was
-	  developed as an open alternative to the IBM MicroChannel bus.
-
-	  The EISA bus provided some of the features of the IBM MicroChannel
-	  bus while maintaining backward compatibility with cards made for
-	  the older ISA bus.  The EISA bus saw limited use between 1988 and
-	  1995 when it was made obsolete by the PCI bus.
-
-	  Say Y here if you are building a kernel for an EISA-based machine.
-
-	  Otherwise, say N.
-
 config SBUS
 	bool
 
@@ -325,8 +315,8 @@ config ALPHA_NONAME
 
 config ALPHA_EV4
 	bool
-	depends on ALPHA_JENSEN || ALPHA_SABLE && !ALPHA_GAMMA || ALPHA_NORITAKE && !ALPHA_PRIMO || ALPHA_MIKASA && !ALPHA_PRIMO || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL || ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
-	default y
+	depends on ALPHA_JENSEN || (ALPHA_SABLE && !ALPHA_GAMMA) || ALPHA_LYNX || ALPHA_NORITAKE && !ALPHA_PRIMO || ALPHA_MIKASA && !ALPHA_PRIMO || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL || ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
+	default y if !ALPHA_LYNX
 
 config ALPHA_LCA
 	bool
@@ -351,9 +341,12 @@ config ALPHA_EB64P
 	  Runs from standard PC power supply.
 
 config ALPHA_EV5
+	bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX
+	default y if ALPHA_RX164 || ALPHA_RAWHIDE || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_SABLE && ALPHA_GAMMA || ALPHA_NORITAKE && ALPHA_PRIMO || ALPHA_MIKASA && ALPHA_PRIMO || ALPHA_PC164 || ALPHA_TAKARA || ALPHA_EB164 || ALPHA_ALCOR
+
+config ALPHA_EV4
 	bool
-	depends on ALPHA_RX164 || ALPHA_RAWHIDE || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_SABLE && ALPHA_GAMMA || ALPHA_NORITAKE && ALPHA_PRIMO || ALPHA_MIKASA && ALPHA_PRIMO || ALPHA_PC164 || ALPHA_TAKARA || ALPHA_EB164 || ALPHA_ALCOR
-	default y
+	default y if ALPHA_LYNX && !ALPHA_EV5
 
 config ALPHA_CIA
 	bool
@@ -384,9 +377,14 @@ config ALPHA_GAMMA
 	help
 	  Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx.
 
+config ALPHA_GAMMA
+	bool
+	depends on ALPHA_LYNX
+	default y
+
 config ALPHA_T2
 	bool
-	depends on ALPHA_SABLE
+	depends on ALPHA_SABLE || ALPHA_LYNX
 	default y
 
 config ALPHA_PYXIS
@@ -431,9 +429,23 @@ config ALPHA_IRONGATE
 	depends on ALPHA_NAUTILUS
 	default y
 
+config ALPHA_AVANTI
+	bool
+	depends on ALPHA_XL || ALPHA_AVANTI_CH
+	default y
+	help
+	  Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
+	  Alphas. Info at
+	  <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
+
+config ALPHA_BROKEN_IRQ_MASK
+	bool
+	depends on ALPHA_GENERIC || ALPHA_PC164
+	default y
+
 config ALPHA_SRM
 	bool "Use SRM as bootloader" if ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P || ALPHA_PC164 || ALPHA_TAKARA || ALPHA_EB164 || ALPHA_ALCOR || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_NAUTILUS || ALPHA_NONAME
-	default y if ALPHA_JENSEN || ALPHA_MIKASA || ALPHA_SABLE || ALPHA_NORITAKE || ALPHA_DP264 || ALPHA_RAWHIDE || ALPHA_EIGER || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
+	default y if ALPHA_JENSEN || ALPHA_MIKASA || ALPHA_SABLE || ALPHA_LYNX || ALPHA_NORITAKE || ALPHA_DP264 || ALPHA_RAWHIDE || ALPHA_EIGER || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
 	---help---
 	  There are two different types of booting firmware on Alphas: SRM,
 	  which is command line driven, and ARC, which uses menus and arrow
@@ -459,28 +471,26 @@ config EARLY_PRINTK
 	depends on ALPHA_GENERIC || ALPHA_SRM
 	default y
 
-config ALPHA_EISA
+config EISA
 	bool
-	depends on ALPHA_ALCOR || ALPHA_MIKASA || ALPHA_SABLE || ALPHA_NORITAKE || ALPHA_RAWHIDE
+	depends on ALPHA_GENERIC || ALPHA_JENSEN || ALPHA_ALCOR || ALPHA_MIKASA || ALPHA_SABLE || ALPHA_LYNX || ALPHA_NORITAKE || ALPHA_RAWHIDE
 	default y
+	---help---
+	  The Extended Industry Standard Architecture (EISA) bus was
+	  developed as an open alternative to the IBM MicroChannel bus.
 
-config ALPHA_AVANTI
-	bool
-	depends on ALPHA_XL || ALPHA_AVANTI_CH
-	default y
-	help
-	  Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
-	  Alphas. Info at
-	  <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
+	  The EISA bus provided some of the features of the IBM MicroChannel
+	  bus while maintaining backward compatibility with cards made for
+	  the older ISA bus.  The EISA bus saw limited use between 1988 and
+	  1995 when it was made obsolete by the PCI bus.
 
-config ALPHA_BROKEN_IRQ_MASK
-	bool
-	depends on ALPHA_GENERIC || ALPHA_PC164
-	default y
+	  Say Y here if you are building a kernel for an EISA-based machine.
+
+	  Otherwise, say N.
 
 config SMP
 	bool "Symmetric multi-processing support"
-	depends on ALPHA_SABLE || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
+	depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
 	---help---
 	  This enables support for systems with more than one CPU. If you have
 	  a system with only one CPU, like most personal computers, say N. If

arch/alpha/kernel/Makefile

@@ -83,6 +83,7 @@ obj-$(CONFIG_ALPHA_RAWHIDE)	+= sys_rawhide.o irq_i8259.o
 obj-$(CONFIG_ALPHA_RUFFIAN)	+= sys_ruffian.o irq_pyxis.o irq_i8259.o
 obj-$(CONFIG_ALPHA_RX164)	+= sys_rx164.o irq_i8259.o
 obj-$(CONFIG_ALPHA_SABLE)	+= sys_sable.o
+obj-$(CONFIG_ALPHA_LYNX)	+= sys_sable.o
 obj-$(CONFIG_ALPHA_BOOK1)	+= sys_sio.o irq_i8259.o irq_srm.o ns87312.o
 obj-$(CONFIG_ALPHA_AVANTI)	+= sys_sio.o irq_i8259.o irq_srm.o ns87312.o
 obj-$(CONFIG_ALPHA_NONAME)	+= sys_sio.o irq_i8259.o irq_srm.o ns87312.o

arch/alpha/kernel/proto.h

@@ -76,6 +76,7 @@ extern void polaris_machine_check(u64, u64, struct pt_regs *);
 /* core_t2.c */
 extern struct pci_ops t2_pci_ops;
 extern void t2_init_arch(void);
+extern void t2_kill_arch(int);
 extern void t2_machine_check(u64, u64, struct pt_regs *);
 extern void t2_pci_tbi(struct pci_controller *, dma_addr_t, dma_addr_t);
 

arch/alpha/kernel/setup.c

@@ -162,6 +162,7 @@ WEAK(eb66p_mv);
 WEAK(eiger_mv);
 WEAK(jensen_mv);
 WEAK(lx164_mv);
+WEAK(lynx_mv);
 WEAK(marvel_ev7_mv);
 WEAK(miata_mv);
 WEAK(mikasa_mv);
@@ -739,7 +740,7 @@ get_sysvec(unsigned long type, unsigned long variation, unsigned long cpu)
 		NULL,		/* Turbolaser */
 		&avanti_mv,
 		NULL,		/* Mustang */
-		&alcor_mv,	/* Alcor, Bret, Maverick.  */
+		NULL,		/* Alcor, Bret, Maverick. HWRPB inaccurate? */
 		NULL,		/* Tradewind */
 		NULL,		/* Mikasa -- see below.  */
 		NULL,		/* EB64 */
@@ -748,7 +749,7 @@ get_sysvec(unsigned long type, unsigned long variation, unsigned long cpu)
 		&alphabook1_mv,
 		&rawhide_mv,
 		NULL,		/* K2 */
-		NULL,		/* Lynx */
+		&lynx_mv,	/* Lynx */
 		&xl_mv,
 		NULL,		/* EB164 -- see variation.  */
 		NULL,		/* Noritake -- see below.  */
@@ -930,6 +931,7 @@ get_sysvec_byname(const char *name)
 		&eiger_mv,
 		&jensen_mv,
 		&lx164_mv,
+		&lynx_mv,
 		&miata_mv,
 		&mikasa_mv,
 		&mikasa_primo_mv,

include/asm-alpha/core_t2.h

@@ -3,8 +3,9 @@
 
 #include <linux/config.h>
 #include <linux/types.h>
+#include <linux/spinlock.h>
 #include <asm/compiler.h>
-
+#include <asm/system.h>
 
 /*
  * T2 is the internal name for the core logic chipset which provides
@@ -22,6 +23,7 @@
 #define T2_MEM_R1_MASK 0x07ffffff  /* Mem sparse region 1 mask is 26 bits */
 
 /* GAMMA-SABLE is a SABLE with EV5-based CPUs */
+/* All LYNX machines, EV4 or EV5, use the GAMMA bias also */
 #define _GAMMA_BIAS		0x8000000000UL
 
 #if defined(CONFIG_ALPHA_GENERIC)
@@ -57,10 +59,33 @@
 #define T2_WMASK2		(IDENT_ADDR + GAMMA_BIAS + 0x38e0001c0UL)
 #define T2_TBASE2		(IDENT_ADDR + GAMMA_BIAS + 0x38e0001e0UL)
 #define T2_TLBBR		(IDENT_ADDR + GAMMA_BIAS + 0x38e000200UL)
-
+#define T2_IVR			(IDENT_ADDR + GAMMA_BIAS + 0x38e000220UL)
 #define T2_HAE_3		(IDENT_ADDR + GAMMA_BIAS + 0x38e000240UL)
 #define T2_HAE_4		(IDENT_ADDR + GAMMA_BIAS + 0x38e000260UL)
 
+/* The CSRs below are T3/T4 only */
+#define T2_WBASE3		(IDENT_ADDR + GAMMA_BIAS + 0x38e000280UL)
+#define T2_WMASK3		(IDENT_ADDR + GAMMA_BIAS + 0x38e0002a0UL)
+#define T2_TBASE3		(IDENT_ADDR + GAMMA_BIAS + 0x38e0002c0UL)
+
+#define T2_TDR0			(IDENT_ADDR + GAMMA_BIAS + 0x38e000300UL)
+#define T2_TDR1			(IDENT_ADDR + GAMMA_BIAS + 0x38e000320UL)
+#define T2_TDR2			(IDENT_ADDR + GAMMA_BIAS + 0x38e000340UL)
+#define T2_TDR3			(IDENT_ADDR + GAMMA_BIAS + 0x38e000360UL)
+#define T2_TDR4			(IDENT_ADDR + GAMMA_BIAS + 0x38e000380UL)
+#define T2_TDR5			(IDENT_ADDR + GAMMA_BIAS + 0x38e0003a0UL)
+#define T2_TDR6			(IDENT_ADDR + GAMMA_BIAS + 0x38e0003c0UL)
+#define T2_TDR7			(IDENT_ADDR + GAMMA_BIAS + 0x38e0003e0UL)
+
+#define T2_WBASE4		(IDENT_ADDR + GAMMA_BIAS + 0x38e000400UL)
+#define T2_WMASK4		(IDENT_ADDR + GAMMA_BIAS + 0x38e000420UL)
+#define T2_TBASE4		(IDENT_ADDR + GAMMA_BIAS + 0x38e000440UL)
+
+#define T2_AIR			(IDENT_ADDR + GAMMA_BIAS + 0x38e000460UL)
+#define T2_VAR			(IDENT_ADDR + GAMMA_BIAS + 0x38e000480UL)
+#define T2_DIR			(IDENT_ADDR + GAMMA_BIAS + 0x38e0004a0UL)
+#define T2_ICE			(IDENT_ADDR + GAMMA_BIAS + 0x38e0004c0UL)
+
 #define T2_HAE_ADDRESS		T2_HAE_1
 
 /*  T2 CSRs are in the non-cachable primary IO space from 3.8000.0000 to
@@ -100,6 +125,9 @@
 #define T2_CPU1_BASE            (IDENT_ADDR + GAMMA_BIAS + 0x381000000L)
 #define T2_CPU2_BASE            (IDENT_ADDR + GAMMA_BIAS + 0x382000000L)
 #define T2_CPU3_BASE            (IDENT_ADDR + GAMMA_BIAS + 0x383000000L)
+
+#define T2_CPUn_BASE(n)		(T2_CPU0_BASE + (((n)&3) * 0x001000000L))
+
 #define T2_MEM0_BASE            (IDENT_ADDR + GAMMA_BIAS + 0x388000000L)
 #define T2_MEM1_BASE            (IDENT_ADDR + GAMMA_BIAS + 0x389000000L)
 #define T2_MEM2_BASE            (IDENT_ADDR + GAMMA_BIAS + 0x38a000000L)
@@ -408,87 +436,120 @@ __EXTERN_INLINE void t2_outl(u32 b, unsigned long addr)
 	set_hae(msb); \
 }
 
+static spinlock_t t2_hae_lock = SPIN_LOCK_UNLOCKED;
+
 __EXTERN_INLINE u8 t2_readb(unsigned long addr)
 {
 	unsigned long result, msb;
+	unsigned long flags;
+	spin_lock_irqsave(&t2_hae_lock, flags);
 
 	t2_set_hae;
 
 	result = *(vip) ((addr << 5) + T2_SPARSE_MEM + 0x00);
+	spin_unlock_irqrestore(&t2_hae_lock, flags);
 	return __kernel_extbl(result, addr & 3);
 }
 
 __EXTERN_INLINE u16 t2_readw(unsigned long addr)
 {
 	unsigned long result, msb;
+	unsigned long flags;
+	spin_lock_irqsave(&t2_hae_lock, flags);
 
 	t2_set_hae;
 
 	result = *(vuip) ((addr << 5) + T2_SPARSE_MEM + 0x08);
+	spin_unlock_irqrestore(&t2_hae_lock, flags);
 	return __kernel_extwl(result, addr & 3);
 }
 
-/* On SABLE with T2, we must use SPARSE memory even for 32-bit access. */
+/*
+ * On SABLE with T2, we must use SPARSE memory even for 32-bit access,
+ * because we cannot access all of DENSE without changing its HAE.
+ */
 __EXTERN_INLINE u32 t2_readl(unsigned long addr)
 {
-	unsigned long msb;
+	unsigned long result, msb;
+	unsigned long flags;
+	spin_lock_irqsave(&t2_hae_lock, flags);
 
 	t2_set_hae;
 
-	return *(vuip) ((addr << 5) + T2_SPARSE_MEM + 0x18);
+	result = *(vuip) ((addr << 5) + T2_SPARSE_MEM + 0x18);
+	spin_unlock_irqrestore(&t2_hae_lock, flags);
+	return result & 0xffffffffUL;
 }
 
 __EXTERN_INLINE u64 t2_readq(unsigned long addr)
 {
 	unsigned long r0, r1, work, msb;
+	unsigned long flags;
+	spin_lock_irqsave(&t2_hae_lock, flags);
 
 	t2_set_hae;
 
 	work = (addr << 5) + T2_SPARSE_MEM + 0x18;
 	r0 = *(vuip)(work);
 	r1 = *(vuip)(work + (4 << 5));
+	spin_unlock_irqrestore(&t2_hae_lock, flags);
 	return r1 << 32 | r0;
 }
 
 __EXTERN_INLINE void t2_writeb(u8 b, unsigned long addr)
 {
 	unsigned long msb, w;
+	unsigned long flags;
+	spin_lock_irqsave(&t2_hae_lock, flags);
 
 	t2_set_hae;
 
 	w = __kernel_insbl(b, addr & 3);
 	*(vuip) ((addr << 5) + T2_SPARSE_MEM + 0x00) = w;
+	spin_unlock_irqrestore(&t2_hae_lock, flags);
 }
 
 __EXTERN_INLINE void t2_writew(u16 b, unsigned long addr)
 {
 	unsigned long msb, w;
+	unsigned long flags;
+	spin_lock_irqsave(&t2_hae_lock, flags);
 
 	t2_set_hae;
 
 	w = __kernel_inswl(b, addr & 3);
 	*(vuip) ((addr << 5) + T2_SPARSE_MEM + 0x08) = w;
+	spin_unlock_irqrestore(&t2_hae_lock, flags);
 }
 
-/* On SABLE with T2, we must use SPARSE memory even for 32-bit access. */
+/*
+ * On SABLE with T2, we must use SPARSE memory even for 32-bit access,
+ * because we cannot access all of DENSE without changing its HAE.
+ */
 __EXTERN_INLINE void t2_writel(u32 b, unsigned long addr)
 {
 	unsigned long msb;
+	unsigned long flags;
+	spin_lock_irqsave(&t2_hae_lock, flags);
 
 	t2_set_hae;
 
 	*(vuip) ((addr << 5) + T2_SPARSE_MEM + 0x18) = b;
+	spin_unlock_irqrestore(&t2_hae_lock, flags);
 }
 
 __EXTERN_INLINE void t2_writeq(u64 b, unsigned long addr)
 {
 	unsigned long msb, work;
+	unsigned long flags;
+	spin_lock_irqsave(&t2_hae_lock, flags);
 
 	t2_set_hae;
 
 	work = (addr << 5) + T2_SPARSE_MEM + 0x18;
 	*(vuip)work = b;
 	*(vuip)(work + (4 << 5)) = b >> 32;
+	spin_unlock_irqrestore(&t2_hae_lock, flags);
 }
 
 __EXTERN_INLINE unsigned long t2_ioremap(unsigned long addr, 

include/asm-alpha/irq.h

@@ -42,6 +42,7 @@
 # define NR_IRQS	40
 
 #elif defined(CONFIG_ALPHA_DP264) || \
+      defined(CONFIG_ALPHA_LYNX)  || \
       defined(CONFIG_ALPHA_SHARK) || \
       defined(CONFIG_ALPHA_EIGER)
 # define NR_IRQS	64