Commit 2f3c7b81 authored by Helge Deller's avatar Helge Deller

parisc: Add core code for self-extracting kernel

Signed-off-by: default avatarHelge Deller <deller@gmx.de>
parent e35a2ce6
#
# Makefile for the linux parisc-specific parts of the boot image creator.
#
COMPILE_VERSION := __linux_compile_version_id__`hostname | \
tr -c '[0-9A-Za-z]' '_'`__`date | \
tr -c '[0-9A-Za-z]' '_'`_t
ccflags-y := -DCOMPILE_VERSION=$(COMPILE_VERSION) -gstabs -I.
targets := image
targets += bzImage
subdir- := compressed
$(obj)/image: vmlinux FORCE
$(call if_changed,objcopy)
$(obj)/bzImage: $(obj)/compressed/vmlinux FORCE
$(call if_changed,objcopy)
$(obj)/compressed/vmlinux: FORCE
$(Q)$(MAKE) $(build)=$(obj)/compressed $@
install: $(CONFIGURE) $(obj)/bzImage
sh -x $(srctree)/$(obj)/install.sh $(KERNELRELEASE) $(obj)/bzImage \
System.map "$(INSTALL_PATH)"
sizes.h
vmlinux
vmlinux.lds
#
# linux/arch/parisc/boot/compressed/Makefile
#
# create a compressed self-extracting vmlinux image from the original vmlinux
#
KCOV_INSTRUMENT := n
GCOV_PROFILE := n
UBSAN_SANITIZE := n
targets := vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2
targets += vmlinux.bin.xz vmlinux.bin.lzma vmlinux.bin.lzo vmlinux.bin.lz4
targets += misc.o piggy.o sizes.h head.o real2.o firmware.o
KBUILD_CFLAGS := -D__KERNEL__ -O2 -DBOOTLOADER
KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
KBUILD_CFLAGS += $(cflags-y) -fno-delete-null-pointer-checks
KBUILD_CFLAGS += -fno-PIE -mno-space-regs -mdisable-fpregs
ifndef CONFIG_64BIT
KBUILD_CFLAGS += -mfast-indirect-calls
endif
OBJECTS += $(obj)/head.o $(obj)/real2.o $(obj)/firmware.o $(obj)/misc.o $(obj)/piggy.o
# LDFLAGS_vmlinux := -X --whole-archive -e startup -T
LDFLAGS_vmlinux := -X -e startup --as-needed -T
$(obj)/vmlinux: $(obj)/vmlinux.lds $(OBJECTS) $(LIBGCC)
$(call if_changed,ld)
sed-sizes := -e 's/^\([0-9a-fA-F]*\) . \(__bss_start\|_end\|parisc_kernel_start\)$$/\#define SZ\2 0x\1/p'
quiet_cmd_sizes = GEN $@
cmd_sizes = $(NM) $< | sed -n $(sed-sizes) > $@
$(obj)/sizes.h: vmlinux
$(call if_changed,sizes)
AFLAGS_head.o += -I$(objtree)/$(obj) -DBOOTLOADER
$(obj)/head.o: $(obj)/sizes.h
CFLAGS_misc.o += -I$(objtree)/$(obj)
$(obj)/misc.o: $(obj)/sizes.h
$(obj)/firmware.o: $(obj)/firmware.c
$(obj)/firmware.c: $(srctree)/arch/$(SRCARCH)/kernel/firmware.c
$(call cmd,shipped)
AFLAGS_real2.o += -DBOOTLOADER
$(obj)/real2.o: $(obj)/real2.S
$(obj)/real2.S: $(srctree)/arch/$(SRCARCH)/kernel/real2.S
$(call cmd,shipped)
$(obj)/misc.o: $(obj)/sizes.h
CPPFLAGS_vmlinux.lds += -I$(objtree)/$(obj) -DBOOTLOADER
$(obj)/vmlinux.lds: $(obj)/sizes.h
OBJCOPYFLAGS_vmlinux.bin := -O binary -R .comment -S
$(obj)/vmlinux.bin: vmlinux
$(call if_changed,objcopy)
vmlinux.bin.all-y := $(obj)/vmlinux.bin
suffix-$(CONFIG_KERNEL_GZIP) := gz
suffix-$(CONFIG_KERNEL_BZIP2) := bz2
suffix-$(CONFIG_KERNEL_LZ4) := lz4
suffix-$(CONFIG_KERNEL_LZMA) := lzma
suffix-$(CONFIG_KERNEL_LZO) := lzo
suffix-$(CONFIG_KERNEL_XZ) := xz
$(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y)
$(call if_changed,gzip)
$(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y)
$(call if_changed,bzip2)
$(obj)/vmlinux.bin.lz4: $(vmlinux.bin.all-y)
$(call if_changed,lz4)
$(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y)
$(call if_changed,lzma)
$(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y)
$(call if_changed,lzo)
$(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y)
$(call if_changed,xzkern)
LDFLAGS_piggy.o := -r --format binary --oformat $(LD_BFD) -T
$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.$(suffix-y)
$(call if_changed,ld)
/*
* Startup glue code to uncompress the kernel
*
* (C) 2017 Helge Deller <deller@gmx.de>
*/
#include <linux/init.h>
#include <linux/linkage.h>
#include <asm/asm-offsets.h>
#include <asm/page.h>
#include <asm/psw.h>
#include <asm/pdc.h>
#include <asm/assembly.h>
#include "sizes.h"
#define BOOTADDR(x) (x)
#ifndef CONFIG_64BIT
.import $global$ /* forward declaration */
#endif /*!CONFIG_64BIT*/
__HEAD
ENTRY(startup)
.level LEVEL
#define PSW_W_SM 0x200
#define PSW_W_BIT 36
;! nuke the W bit, saving original value
.level 2.0
rsm PSW_W_SM, %r1
.level 1.1
extrw,u %r1, PSW_W_BIT-32, 1, %r1
copy %r1, %arg0
/* Make sure sr4-sr7 are set to zero for the kernel address space */
mtsp %r0,%sr4
mtsp %r0,%sr5
mtsp %r0,%sr6
mtsp %r0,%sr7
/* Clear BSS */
.import _bss,data
.import _ebss,data
load32 BOOTADDR(_bss),%r3
load32 BOOTADDR(_ebss),%r4
ldo FRAME_SIZE(%r4),%sp /* stack at end of bss */
$bss_loop:
cmpb,<<,n %r3,%r4,$bss_loop
stw,ma %r0,4(%r3)
/* Initialize the global data pointer */
loadgp
/* arg0..arg4 were set by palo. */
copy %arg1, %r6 /* command line */
copy %arg2, %r7 /* rd-start */
copy %arg3, %r8 /* rd-end */
load32 BOOTADDR(decompress_kernel),%r3
#ifdef CONFIG_64BIT
.level LEVEL
ssm PSW_W_SM, %r0 /* set W-bit */
depdi 0, 31, 32, %r3
#endif
load32 BOOTADDR(startup_continue), %r2
bv,n 0(%r3)
startup_continue:
#ifdef CONFIG_64BIT
.level LEVEL
rsm PSW_W_SM, %r0 /* clear W-bit */
#endif
load32 KERNEL_BINARY_TEXT_START, %arg0 /* free mem */
copy %r6, %arg1 /* command line */
copy %r7, %arg2 /* rd-start */
copy %r8, %arg3 /* rd-end */
bv,n 0(%ret0)
END(startup)
/*
* Definitions and wrapper functions for kernel decompressor
*
* (C) 2017 Helge Deller <deller@gmx.de>
*/
#include <linux/uaccess.h>
#include <asm/unaligned.h>
#include <asm/page.h>
#include "sizes.h"
/*
* gzip declarations
*/
#define STATIC static
#undef memmove
#define memmove memmove
#define memzero(s, n) memset((s), 0, (n))
#define malloc malloc_gzip
#define free free_gzip
/* Symbols defined by linker scripts */
extern char input_data[];
extern int input_len;
extern __le32 output_len; /* at unaligned address, little-endian */
extern char _text, _end;
extern char _bss, _ebss;
extern char _startcode_end;
extern void startup_continue(void *entry, unsigned long cmdline,
unsigned long rd_start, unsigned long rd_end) __noreturn;
void error(char *m) __noreturn;
static unsigned long free_mem_ptr;
static unsigned long free_mem_end_ptr;
#ifdef CONFIG_KERNEL_GZIP
#include "../../../../lib/decompress_inflate.c"
#endif
#ifdef CONFIG_KERNEL_BZIP2
#include "../../../../lib/decompress_bunzip2.c"
#endif
#ifdef CONFIG_KERNEL_LZ4
#include "../../../../lib/decompress_unlz4.c"
#endif
#ifdef CONFIG_KERNEL_LZMA
#include "../../../../lib/decompress_unlzma.c"
#endif
#ifdef CONFIG_KERNEL_LZO
#include "../../../../lib/decompress_unlzo.c"
#endif
#ifdef CONFIG_KERNEL_XZ
#include "../../../../lib/decompress_unxz.c"
#endif
void *memmove(void *dest, const void *src, size_t n)
{
const char *s = src;
char *d = dest;
if (d <= s) {
while (n--)
*d++ = *s++;
} else {
d += n;
s += n;
while (n--)
*--d = *--s;
}
return dest;
}
void *memset(void *s, int c, size_t count)
{
char *xs = (char *)s;
while (count--)
*xs++ = c;
return s;
}
void *memcpy(void *d, const void *s, size_t len)
{
char *dest = (char *)d;
const char *source = (const char *)s;
while (len--)
*dest++ = *source++;
return d;
}
size_t strlen(const char *s)
{
const char *sc;
for (sc = s; *sc != '\0'; ++sc)
;
return sc - s;
}
char *strchr(const char *s, int c)
{
while (*s) {
if (*s == (char)c)
return (char *)s;
++s;
}
return NULL;
}
int puts(const char *s)
{
const char *nuline = s;
while ((nuline = strchr(s, '\n')) != NULL) {
if (nuline != s)
pdc_iodc_print(s, nuline - s);
pdc_iodc_print("\r\n", 2);
s = nuline + 1;
}
if (*s != '\0')
pdc_iodc_print(s, strlen(s));
return 0;
}
static int putchar(int c)
{
char buf[2];
buf[0] = c;
buf[1] = '\0';
puts(buf);
return c;
}
void __noreturn error(char *x)
{
puts("\n\n");
puts(x);
puts("\n\n -- System halted");
while (1) /* wait forever */
;
}
static int print_hex(unsigned long num)
{
const char hex[] = "0123456789abcdef";
char str[40];
int i = sizeof(str)-1;
str[i--] = '\0';
do {
str[i--] = hex[num & 0x0f];
num >>= 4;
} while (num);
str[i--] = 'x';
str[i] = '0';
puts(&str[i]);
return 0;
}
int printf(const char *fmt, ...)
{
va_list args;
int i = 0;
va_start(args, fmt);
while (fmt[i]) {
if (fmt[i] != '%') {
put:
putchar(fmt[i++]);
continue;
}
if (fmt[++i] == '%')
goto put;
++i;
print_hex(va_arg(args, unsigned long));
}
va_end(args);
return 0;
}
/* helper functions for libgcc */
void abort(void)
{
error("aborted.");
}
#undef malloc
void *malloc(size_t size)
{
return malloc_gzip(size);
}
#undef free
void free(void *ptr)
{
return free_gzip(ptr);
}
static void flush_data_cache(char *start, unsigned long length)
{
char *end = start + length;
do {
asm volatile("fdc 0(%0)" : : "r" (start));
asm volatile("fic 0(%%sr0,%0)" : : "r" (start));
start += 16;
} while (start < end);
asm volatile("fdc 0(%0)" : : "r" (end));
asm ("sync");
}
unsigned long decompress_kernel(unsigned int started_wide,
unsigned int command_line,
const unsigned int rd_start,
const unsigned int rd_end)
{
char *output;
unsigned long len, len_all;
#ifdef CONFIG_64BIT
parisc_narrow_firmware = 0;
#endif
set_firmware_width_unlocked();
putchar('U'); /* if you get this p and no more, string storage */
/* in $GLOBAL$ is wrong or %dp is wrong */
puts("ncompressing ...\n");
output = (char *) KERNEL_BINARY_TEXT_START;
len_all = __pa(SZ_end) - __pa(SZparisc_kernel_start);
if ((unsigned long) &_startcode_end > (unsigned long) output)
error("Bootcode overlaps kernel code");
len = get_unaligned_le32(&output_len);
if (len > len_all)
error("Output len too big.");
else
memset(&output[len], 0, len_all - len);
/*
* Initialize free_mem_ptr and free_mem_end_ptr.
*/
free_mem_ptr = (unsigned long) &_ebss;
free_mem_ptr += 2*1024*1024; /* leave 2 MB for stack */
/* Limit memory for bootoader to 1GB */
#define ARTIFICIAL_LIMIT (1*1024*1024*1024)
free_mem_end_ptr = PAGE0->imm_max_mem;
if (free_mem_end_ptr > ARTIFICIAL_LIMIT)
free_mem_end_ptr = ARTIFICIAL_LIMIT;
#ifdef CONFIG_BLK_DEV_INITRD
/* if we have ramdisk this is at end of memory */
if (rd_start && rd_start < free_mem_end_ptr)
free_mem_end_ptr = rd_start;
#endif
#ifdef DEBUG
printf("startcode_end = %x\n", &_startcode_end);
printf("commandline = %x\n", command_line);
printf("rd_start = %x\n", rd_start);
printf("rd_end = %x\n", rd_end);
printf("free_ptr = %x\n", free_mem_ptr);
printf("free_ptr_end = %x\n", free_mem_end_ptr);
printf("input_data = %x\n", input_data);
printf("input_len = %x\n", input_len);
printf("output = %x\n", output);
printf("output_len = %x\n", len);
printf("output_max = %x\n", len_all);
#endif
__decompress(input_data, input_len, NULL, NULL,
output, 0, NULL, error);
flush_data_cache(output, len);
printf("Booting kernel ...\n\n");
return (unsigned long) output;
}
#include <asm-generic/vmlinux.lds.h>
#include <asm/page.h>
#include "sizes.h"
#ifndef CONFIG_64BIT
OUTPUT_FORMAT("elf32-hppa-linux")
OUTPUT_ARCH(hppa)
#else
OUTPUT_FORMAT("elf64-hppa-linux")
OUTPUT_ARCH(hppa:hppa2.0w)
#endif
ENTRY(startup)
SECTIONS
{
/* palo loads at 0x60000 */
/* loaded kernel will move to 0x10000 */
. = 0xe0000; /* should not overwrite palo code */
.head.text : {
_head = . ;
HEAD_TEXT
_ehead = . ;
}
/* keep __gp below 0x1000000 */
#ifdef CONFIG_64BIT
. = ALIGN(16);
/* Linkage tables */
.opd : {
*(.opd)
} PROVIDE (__gp = .);
.plt : {
*(.plt)
}
.dlt : {
*(.dlt)
}
#endif
_startcode_end = .;
/* bootloader code and data starts behind area of extracted kernel */
. = (SZ_end - SZparisc_kernel_start + KERNEL_BINARY_TEXT_START);
/* align on next page boundary */
. = ALIGN(4096);
.text : {
_text = .; /* Text */
*(.text)
*(.text.*)
_etext = . ;
}
. = ALIGN(8);
.data : {
_data = . ;
*(.data)
*(.data.*)
_edata = . ;
}
. = ALIGN(8);
.rodata : {
_rodata = . ;
*(.rodata) /* read-only data */
*(.rodata.*)
_erodata = . ;
}
. = ALIGN(8);
.rodata.compressed : {
*(.rodata.compressed)
}
. = ALIGN(8);
.bss : {
_bss = . ;
*(.bss)
*(.bss.*)
*(COMMON)
. = ALIGN(4096);
_ebss = .;
}
STABS_DEBUG
.note 0 : { *(.note) }
/* Sections to be discarded */
DISCARDS
/DISCARD/ : {
#ifdef CONFIG_64BIT
/* temporary hack until binutils is fixed to not emit these
* for static binaries
*/
*(.PARISC.unwind) /* no unwind data */
*(.interp)
*(.dynsym)
*(.dynstr)
*(.dynamic)
*(.hash)
*(.gnu.hash)
#endif
}
}
SECTIONS
{
.rodata.compressed : {
input_len = .;
LONG(input_data_end - input_data) input_data = .;
*(.data)
output_len = . - 4; /* can be at unaligned address */
input_data_end = .;
}
}
#!/bin/sh
#
# arch/parisc/install.sh, derived from arch/i386/boot/install.sh
#
# This file is subject to the terms and conditions of the GNU General Public
# License. See the file "COPYING" in the main directory of this archive
# for more details.
#
# Copyright (C) 1995 by Linus Torvalds
#
# Adapted from code in arch/i386/boot/Makefile by H. Peter Anvin
#
# "make install" script for i386 architecture
#
# Arguments:
# $1 - kernel version
# $2 - kernel image file
# $3 - kernel map file
# $4 - default install path (blank if root directory)
#
verify () {
if [ ! -f "$1" ]; then
echo "" 1>&2
echo " *** Missing file: $1" 1>&2
echo ' *** You need to run "make" before "make install".' 1>&2
echo "" 1>&2
exit 1
fi
}
# Make sure the files actually exist
verify "$2"
verify "$3"
# User may have a custom install script
if [ -n "${INSTALLKERNEL}" ]; then
if [ -x ~/bin/${INSTALLKERNEL} ]; then exec ~/bin/${INSTALLKERNEL} "$@"; fi
if [ -x /sbin/${INSTALLKERNEL} ]; then exec /sbin/${INSTALLKERNEL} "$@"; fi
fi
# Default install
if [ "$(basename $2)" = "zImage" ]; then
# Compressed install
echo "Installing compressed kernel"
base=vmlinuz
else
# Normal install
echo "Installing normal kernel"
base=vmlinux
fi
if [ -f $4/$base-$1 ]; then
mv $4/$base-$1 $4/$base-$1.old
fi
cat $2 > $4/$base-$1
# Install system map file
if [ -f $4/System.map-$1 ]; then
mv $4/System.map-$1 $4/System.map-$1.old
fi
cp $3 $4/System.map-$1
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