h8300: compressed image support

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>

6 files changed, 226 insertions, 0 deletions

diff --git a/arch/h8300/boot/Makefile b/arch/h8300/boot/Makefile
new file mode 100644
index 000000000000..2f6393a5da57
--- /dev/null
+++ b/arch/h8300/boot/Makefile
@@ -0,0 +1,26 @@
+# arch/h8300/boot/Makefile
+
+targets := vmlinux.srec vmlinux.bin zImage
+subdir- := compressed
+
+OBJCOPYFLAGS_vmlinux.srec := -Osrec
+OBJCOPYFLAGS_vmlinux.bin  := -Obinary
+OBJCOPYFLAGS_zImage := -O binary -R .note -R .comment -R .stab -R .stabstr -S
+
+UIMAGE_LOADADDR = $(CONFIG_RAMBASE)
+UIMAGE_ENTRYADDR = $(shell /bin/bash -c 'printf "0x%08x" \
+        $$[$(CONFIG_RAMBASE) + $(CONFIG_OFFSET)]')
+
+$(obj)/vmlinux.srec $(obj)/vmlinux.bin:  vmlinux FORCE
+        $(call if_changed,objcopy)
+
+$(obj)/zImage: $(obj)/compressed/vmlinux FORCE
+        $(call if_changed,objcopy)
+
+$(obj)/compressed/vmlinux: FORCE
+        $(Q)$(MAKE) $(build)=$(obj)/compressed $@
+
+$(obj)/uImage.bin: $(obj)/vmlinux.bin
+        $(call if_changed,uimage,none)
+
+CLEAN_FILES += arch/$(ARCH)/vmlinux.bin arch/$(ARCH)/vmlinux.srec arch/$(ARCH)/uImage.bin
diff --git a/arch/h8300/boot/compressed/Makefile b/arch/h8300/boot/compressed/Makefile
new file mode 100644
index 000000000000..87d03b7ee97e
--- /dev/null
+++ b/arch/h8300/boot/compressed/Makefile
@@ -0,0 +1,37 @@
+#
+# linux/arch/sh/boot/compressed/Makefile
+#
+# create a compressed vmlinux image from the original vmlinux
+#
+
+targets         := vmlinux vmlinux.bin vmlinux.bin.gz head.o misc.o piggy.o
+
+OBJECTS = $(obj)/head.o $(obj)/misc.o
+
+#
+# IMAGE_OFFSET is the load offset of the compression loader
+# Assign dummy values if these 2 variables are not defined,
+# in order to suppress error message.
+#
+CONFIG_MEMORY_START     ?= 0x00400000
+CONFIG_BOOT_LINK_OFFSET ?= 0x00140000
+IMAGE_OFFSET := $(shell printf "0x%08x" $$(($(CONFIG_MEMORY_START)+$(CONFIG_BOOT_LINK_OFFSET))))
+
+LIBGCC := $(shell $(CROSS-COMPILE)$(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
+LDFLAGS_vmlinux := -Ttext $(IMAGE_OFFSET) -estartup $(obj)/vmlinux.lds
+
+$(obj)/vmlinux: $(OBJECTS) $(obj)/piggy.o $(LIBGCC) FORCE
+        $(call if_changed,ld)
+        @:
+
+$(obj)/vmlinux.bin: vmlinux FORCE
+        $(call if_changed,objcopy)
+
+$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
+        $(call if_changed,gzip)
+
+LDFLAGS_piggy.o := -r --format binary --oformat elf32-h8300-linux -T
+OBJCOPYFLAGS := -O binary
+
+$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.gz FORCE
+        $(call if_changed,ld)
diff --git a/arch/h8300/boot/compressed/head.S b/arch/h8300/boot/compressed/head.S
new file mode 100644
index 000000000000..74c0d8cc40ba
--- /dev/null
+++ b/arch/h8300/boot/compressed/head.S
@@ -0,0 +1,48 @@
+/*
+ *  linux/arch/h8300/boot/compressed/head.S
+ *
+ *  Copyright (C) 2006 Yoshinori Sato
+ */
+
+#include <linux/linkage.h>
+
+        .section        .text..startup,"ax"
+        .global startup
+startup:
+        mov.l   er0, er4
+        mov.l   er0, sp
+        mov.l   #__sbss, er0
+        mov.l   #__ebss, er1
+        sub.l   er0, er1
+        shlr    er1
+        shlr    er1
+        sub.l   er2, er2
+1:
+        mov.l   er2, @er0
+        adds    #4, er0
+        dec.l   #1, er1
+        bne     1b
+        jsr     @decompress_kernel
+        mov.l   er4, er0
+        jmp     @0x400000
+
+        .align  9
+fake_headers_as_bzImage:
+        .word   0
+        .ascii  "HdrS"          ; header signature
+        .word   0x0202          ; header version number (>= 0x0105)
+                                ; or else old loadlin-1.5 will fail)
+        .word   0               ; default_switch
+        .word   0               ; SETUPSEG
+        .word   0x1000
+        .word   0               ; pointing to kernel version string
+        .byte   0               ; = 0, old one (LILO, Loadlin,
+                                ; 0xTV: T=0 for LILO
+                                ;       V = version
+        .byte   1               ; Load flags bzImage=1
+        .word   0x8000          ; size to move, when setup is not
+        .long   0x100000        ; 0x100000 = default for big kernel
+        .long   0               ; address of loaded ramdisk image
+        .long   0               ; its size in bytes
+
+        .end
diff --git a/arch/h8300/boot/compressed/misc.c b/arch/h8300/boot/compressed/misc.c
new file mode 100644
index 000000000000..704274127c07
--- /dev/null
+++ b/arch/h8300/boot/compressed/misc.c
@@ -0,0 +1,74 @@
+/*
+ * arch/h8300/boot/compressed/misc.c
+ *
+ * This is a collection of several routines from gzip-1.0.3
+ * adapted for Linux.
+ *
+ * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
+ *
+ * Adapted for h8300 by Yoshinori Sato 2006
+ */
+
+#include <asm/uaccess.h>
+
+/*
+ * gzip declarations
+ */
+
+#define OF(args)  args
+#define STATIC static
+
+#undef memset
+#undef memcpy
+#define memzero(s, n)     memset((s), (0), (n))
+
+extern int _end;
+static unsigned long free_mem_ptr;
+static unsigned long free_mem_end_ptr;
+
+extern char input_data[];
+extern int input_len;
+static unsigned char *output;
+
+#define HEAP_SIZE             0x10000
+
+#include "../../../../lib/decompress_inflate.c"
+
+void *memset(void *s, int c, size_t n)
+{
+        int i;
+        char *ss = (char *)s;
+
+        for (i = 0; i < n; i++)
+                ss[i] = c;
+        return s;
+}
+
+void *memcpy(void *dest, const void *src, size_t n)
+{
+        int i;
+        char *d = (char *)dest, *s = (char *)src;
+
+        for (i = 0; i < n; i++)
+                d[i] = s[i];
+        return dest;
+}
+
+static void error(char *x)
+{
+
+        while (1)
+                ;       /* Halt */
+}
+
+#define STACK_SIZE (4096)
+long user_stack[STACK_SIZE];
+long *stack_start = &user_stack[STACK_SIZE];
+
+void decompress_kernel(void)
+{
+        free_mem_ptr = (unsigned long)&_end;
+        free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;
+
+        decompress(input_data, input_len, NULL, NULL, output, NULL, error);
+}
diff --git a/arch/h8300/boot/compressed/vmlinux.lds b/arch/h8300/boot/compressed/vmlinux.lds
new file mode 100644
index 000000000000..a0a3a0ed54ef
--- /dev/null
+++ b/arch/h8300/boot/compressed/vmlinux.lds
@@ -0,0 +1,32 @@
+SECTIONS
+{
+        .text :
+        {
+        __stext = . ;
+        __text = .;
+               *(.text..startup)
+               *(.text)
+        __etext = . ;
+        }
+
+        .rodata :
+        {
+                *(.rodata)
+        }
+        .data :
+
+        {
+        __sdata = . ;
+        ___data_start = . ;
+                *(.data.*)
+        }
+        .bss :
+        {
+        . = ALIGN(0x4) ;
+        __sbss = . ;
+                *(.bss*)
+        . = ALIGN(0x4) ;
+        __ebss = . ;
+        __end = . ;
+        }
+}
diff --git a/arch/h8300/boot/compressed/vmlinux.scr b/arch/h8300/boot/compressed/vmlinux.scr
new file mode 100644
index 000000000000..a084903603fe
--- /dev/null
+++ b/arch/h8300/boot/compressed/vmlinux.scr
@@ -0,0 +1,9 @@
+SECTIONS
+{
+  .data : {
+        input_len = .;
+        LONG(input_data_end - input_data) input_data = .;
+        *(.data)
+        input_data_end = .;
+        }
+}