#if defined(CONFIG_DEBUG_ICEDCC)
-#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K)
+#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) || defined(CONFIG_CPU_V7)
.macro loadsp, rb, tmp
.endm
.macro writeb, ch, rb
mcr p14, 0, \ch, c0, c5, 0
.endm
-#elif defined(CONFIG_CPU_V7)
- .macro loadsp, rb, tmp
- .endm
- .macro writeb, ch, rb
-wait: mrc p14, 0, pc, c0, c1, 0
- bcs wait
- mcr p14, 0, \ch, c0, c5, 0
- .endm
#elif defined(CONFIG_CPU_XSCALE)
.macro loadsp, rb, tmp
.endm
bl cache_on
restart: adr r0, LC0
- ldmia r0, {r1, r2, r3, r5, r6, r9, r11, r12}
- ldr sp, [r0, #32]
+ ldmia r0, {r1, r2, r3, r6, r10, r11, r12}
+ ldr sp, [r0, #28]
/*
* We might be running at a different address. We need
* to fix up various pointers.
*/
sub r0, r0, r1 @ calculate the delta offset
- add r5, r5, r0 @ _start
add r6, r6, r0 @ _edata
+ add r10, r10, r0 @ inflated kernel size location
+
+ /*
+ * The kernel build system appends the size of the
+ * decompressed kernel at the end of the compressed data
+ * in little-endian form.
+ */
+ ldrb r9, [r10, #0]
+ ldrb lr, [r10, #1]
+ orr r9, r9, lr, lsl #8
+ ldrb lr, [r10, #2]
+ ldrb r10, [r10, #3]
+ orr r9, r9, lr, lsl #16
+ orr r9, r9, r10, lsl #24
#ifndef CONFIG_ZBOOT_ROM
/* malloc space is above the relocated stack (64k max) */
/*
* Check to see if we will overwrite ourselves.
* r4 = final kernel address
- * r5 = start of this image
* r9 = size of decompressed image
* r10 = end of this image, including bss/stack/malloc space if non XIP
* We basically want:
- * r4 >= r10 -> OK
- * r4 + image length <= r5 -> OK
+ * r4 - 16k page directory >= r10 -> OK
+ * r4 + image length <= current position (pc) -> OK
*/
+ add r10, r10, #16384
cmp r4, r10
bhs wont_overwrite
add r10, r4, r9
- cmp r10, r5
+ ARM( cmp r10, pc )
+ THUMB( mov lr, pc )
+ THUMB( cmp r10, lr )
bls wont_overwrite
/*
* Relocate ourselves past the end of the decompressed kernel.
- * r5 = start of this image
* r6 = _edata
* r10 = end of the decompressed kernel
* Because we always copy ahead, we need to do it from the end and go
* backward in case the source and destination overlap.
*/
- /* Round up to next 256-byte boundary. */
- add r10, r10, #256
+ /*
+ * Bump to the next 256-byte boundary with the size of
+ * the relocation code added. This avoids overwriting
+ * ourself when the offset is small.
+ */
+ add r10, r10, #((reloc_code_end - restart + 256) & ~255)
bic r10, r10, #255
+ /* Get start of code we want to copy and align it down. */
+ adr r5, restart
+ bic r5, r5, #31
+
sub r9, r6, r5 @ size to copy
add r9, r9, #31 @ rounded up to a multiple
bic r9, r9, #31 @ ... of 32 bytes
/* Preserve offset to relocated code. */
sub r6, r9, r6
+ #ifndef CONFIG_ZBOOT_ROM
+ /* cache_clean_flush may use the stack, so relocate it */
+ add sp, sp, r6
+ #endif
+
bl cache_clean_flush
adr r0, BSYM(restart)
LC0: .word LC0 @ r1
.word __bss_start @ r2
.word _end @ r3
- .word _start @ r5
.word _edata @ r6
- .word _image_size @ r9
+ .word input_data_end - 4 @ r10 (inflated size location)
.word _got_start @ r11
.word _got_end @ ip
- .word user_stack_end @ sp
+ .word .L_user_stack_end @ sp
.size LC0, . - LC0
#ifdef CONFIG_ARCH_RPC
W(b) __armv4_mmu_cache_off
W(b) __armv6_mmu_cache_flush
- .word 0x560f5810 @ Marvell PJ4 ARMv6
- .word 0xff0ffff0
- W(b) __armv4_mmu_cache_on
- W(b) __armv4_mmu_cache_off
- W(b) __armv6_mmu_cache_flush
-
.word 0x000f0000 @ new CPU Id
.word 0x000f0000
W(b) __armv7_mmu_cache_on
#endif
.ltorg
+ reloc_code_end:
.align
.section ".stack", "aw", %nobits
- user_stack: .space 4096
- user_stack_end:
+ .L_user_stack: .space 4096
+ .L_user_stack_end:
#include <linux/linkage.h>
#include <asm/string.h>
- #include <asm/unaligned.h>
-
static void putstr(const char *ptr);
extern void error(char *x);
#ifdef CONFIG_DEBUG_ICEDCC
-#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K)
+#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) || defined(CONFIG_CPU_V7)
static void icedcc_putc(int ch)
{
asm("mcr p14, 0, %0, c0, c5, 0" : : "r" (ch));
}
-#elif defined(CONFIG_CPU_V7)
-
-static void icedcc_putc(int ch)
-{
- asm(
- "wait: mrc p14, 0, pc, c0, c1, 0 \n\
- bcs wait \n\
- mcr p14, 0, %0, c0, c5, 0 "
- : : "r" (ch));
-}
#elif defined(CONFIG_CPU_XSCALE)
}
/*
- * gzip delarations
+ * gzip declarations
*/
extern char input_data[];
extern char input_data_end[];
unsigned char *output_data;
- unsigned long output_ptr;
unsigned long free_mem_ptr;
unsigned long free_mem_end_ptr;
error("Attempting division by 0!");
}
- extern void do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x));
+ extern int do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x));
- unsigned long
+ void
decompress_kernel(unsigned long output_start, unsigned long free_mem_ptr_p,
unsigned long free_mem_ptr_end_p,
int arch_id)
{
- unsigned char *tmp;
+ int ret;
output_data = (unsigned char *)output_start;
free_mem_ptr = free_mem_ptr_p;
arch_decomp_setup();
- tmp = (unsigned char *) (((unsigned long)input_data_end) - 4);
- output_ptr = get_unaligned_le32(tmp);
-
putstr("Uncompressing Linux...");
- do_decompress(input_data, input_data_end - input_data,
- output_data, error);
- putstr(" done, booting the kernel.\n");
- return output_ptr;
+ ret = do_decompress(input_data, input_data_end - input_data,
+ output_data, error);
+ if (ret)
+ error("decompressor returned an error");
+ else
+ putstr(" done, booting the kernel.\n");
}
projects / karo-tx-linux.git / commitdiff