tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
h8300: compressed image support
Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
+226
+26
arch/h8300/boot/Makefile
+26
arch/h8300/boot/Makefile
···
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# arch/h8300/boot/Makefile
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targets := vmlinux.srec vmlinux.bin zImage
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subdir- := compressed
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OBJCOPYFLAGS_vmlinux.srec := -Osrec
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OBJCOPYFLAGS_vmlinux.bin := -Obinary
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OBJCOPYFLAGS_zImage := -O binary -R .note -R .comment -R .stab -R .stabstr -S
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UIMAGE_LOADADDR = $(CONFIG_RAMBASE)
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UIMAGE_ENTRYADDR = $(shell /bin/bash -c 'printf "0x%08x" \
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$$[$(CONFIG_RAMBASE) + $(CONFIG_OFFSET)]')
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$(obj)/vmlinux.srec $(obj)/vmlinux.bin: vmlinux FORCE
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$(call if_changed,objcopy)
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$(obj)/zImage: $(obj)/compressed/vmlinux FORCE
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$(call if_changed,objcopy)
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$(obj)/compressed/vmlinux: FORCE
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$(Q)$(MAKE) $(build)=$(obj)/compressed $@
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$(obj)/uImage.bin: $(obj)/vmlinux.bin
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$(call if_changed,uimage,none)
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CLEAN_FILES += arch/$(ARCH)/vmlinux.bin arch/$(ARCH)/vmlinux.srec arch/$(ARCH)/uImage.bin
+37
arch/h8300/boot/compressed/Makefile
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arch/h8300/boot/compressed/Makefile
···
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#
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# linux/arch/sh/boot/compressed/Makefile
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#
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# create a compressed vmlinux image from the original vmlinux
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#
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targets := vmlinux vmlinux.bin vmlinux.bin.gz head.o misc.o piggy.o
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OBJECTS = $(obj)/head.o $(obj)/misc.o
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#
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# IMAGE_OFFSET is the load offset of the compression loader
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# Assign dummy values if these 2 variables are not defined,
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# in order to suppress error message.
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#
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CONFIG_MEMORY_START ?= 0x00400000
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CONFIG_BOOT_LINK_OFFSET ?= 0x00140000
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IMAGE_OFFSET := $(shell printf "0x%08x" $$(($(CONFIG_MEMORY_START)+$(CONFIG_BOOT_LINK_OFFSET))))
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LIBGCC := $(shell $(CROSS-COMPILE)$(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
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LDFLAGS_vmlinux := -Ttext $(IMAGE_OFFSET) -estartup $(obj)/vmlinux.lds
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$(obj)/vmlinux: $(OBJECTS) $(obj)/piggy.o $(LIBGCC) FORCE
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$(call if_changed,ld)
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@:
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$(obj)/vmlinux.bin: vmlinux FORCE
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$(call if_changed,objcopy)
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$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
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$(call if_changed,gzip)
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LDFLAGS_piggy.o := -r --format binary --oformat elf32-h8300-linux -T
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OBJCOPYFLAGS := -O binary
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$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.gz FORCE
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$(call if_changed,ld)
+48
arch/h8300/boot/compressed/head.S
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arch/h8300/boot/compressed/head.S
···
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/*
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* linux/arch/h8300/boot/compressed/head.S
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*
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* Copyright (C) 2006 Yoshinori Sato
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*/
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#include <linux/linkage.h>
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.section .text..startup,"ax"
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.global startup
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startup:
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mov.l er0, er4
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mov.l er0, sp
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mov.l #__sbss, er0
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mov.l #__ebss, er1
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sub.l er0, er1
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shlr er1
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shlr er1
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sub.l er2, er2
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1:
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mov.l er2, @er0
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adds #4, er0
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dec.l #1, er1
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bne 1b
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jsr @decompress_kernel
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mov.l er4, er0
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jmp @0x400000
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.align 9
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fake_headers_as_bzImage:
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.word 0
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.ascii "HdrS" ; header signature
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.word 0x0202 ; header version number (>= 0x0105)
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; or else old loadlin-1.5 will fail)
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.word 0 ; default_switch
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.word 0 ; SETUPSEG
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.word 0x1000
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.word 0 ; pointing to kernel version string
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.byte 0 ; = 0, old one (LILO, Loadlin,
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; 0xTV: T=0 for LILO
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; V = version
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.byte 1 ; Load flags bzImage=1
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.word 0x8000 ; size to move, when setup is not
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.long 0x100000 ; 0x100000 = default for big kernel
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.long 0 ; address of loaded ramdisk image
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.long 0 ; its size in bytes
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.end
+74
arch/h8300/boot/compressed/misc.c
+74
arch/h8300/boot/compressed/misc.c
···
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/*
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* arch/h8300/boot/compressed/misc.c
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*
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* This is a collection of several routines from gzip-1.0.3
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* adapted for Linux.
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*
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* malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
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*
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* Adapted for h8300 by Yoshinori Sato 2006
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*/
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#include <asm/uaccess.h>
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/*
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* gzip declarations
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*/
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#define OF(args) args
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#define STATIC static
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#undef memset
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#undef memcpy
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#define memzero(s, n) memset((s), (0), (n))
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extern int _end;
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static unsigned long free_mem_ptr;
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static unsigned long free_mem_end_ptr;
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extern char input_data[];
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extern int input_len;
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static unsigned char *output;
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#define HEAP_SIZE 0x10000
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#include "../../../../lib/decompress_inflate.c"
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void *memset(void *s, int c, size_t n)
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{
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int i;
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char *ss = (char *)s;
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for (i = 0; i < n; i++)
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ss[i] = c;
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return s;
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}
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void *memcpy(void *dest, const void *src, size_t n)
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{
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int i;
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char *d = (char *)dest, *s = (char *)src;
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for (i = 0; i < n; i++)
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d[i] = s[i];
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return dest;
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}
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static void error(char *x)
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{
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while (1)
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; /* Halt */
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}
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#define STACK_SIZE (4096)
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long user_stack[STACK_SIZE];
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long *stack_start = &user_stack[STACK_SIZE];
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void decompress_kernel(void)
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{
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free_mem_ptr = (unsigned long)&_end;
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free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;
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decompress(input_data, input_len, NULL, NULL, output, NULL, error);
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}
+32
arch/h8300/boot/compressed/vmlinux.lds
+32
arch/h8300/boot/compressed/vmlinux.lds
···
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SECTIONS
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{
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.text :
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{
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__stext = . ;
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__text = .;
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*(.text..startup)
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*(.text)
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__etext = . ;
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}
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.rodata :
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{
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*(.rodata)
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}
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.data :
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{
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__sdata = . ;
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___data_start = . ;
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*(.data.*)
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}
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.bss :
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{
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. = ALIGN(0x4) ;
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__sbss = . ;
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*(.bss*)
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. = ALIGN(0x4) ;
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__ebss = . ;
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__end = . ;
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}
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}