diff options
Diffstat (limited to 'arch/arm/boot')
| -rw-r--r-- | arch/arm/boot/compressed/head.S | 50 | ||||
| -rw-r--r-- | arch/arm/boot/compressed/vmlinux.lds.in | 3 |
2 files changed, 26 insertions, 27 deletions
diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S index 99b75aa..535a91d 100644 --- a/arch/arm/boot/compressed/head.S +++ b/arch/arm/boot/compressed/head.S @@ -170,8 +170,8 @@ not_angel: .text adr r0, LC0 - ARM( ldmia r0, {r1, r2, r3, r4, r5, r6, ip, sp} ) - THUMB( ldmia r0, {r1, r2, r3, r4, r5, r6, ip} ) + ARM( ldmia r0, {r1, r2, r3, r4, r5, r6, r11, ip, sp}) + THUMB( ldmia r0, {r1, r2, r3, r4, r5, r6, r11, ip} ) THUMB( ldr sp, [r0, #28] ) subs r0, r0, r1 @ calculate the delta offset @@ -182,12 +182,13 @@ not_angel: /* * We're running at a different address. We need to fix * up various pointers: - * r5 - zImage base address - * r6 - GOT start + * r5 - zImage base address (_start) + * r6 - size of decompressed image + * r11 - GOT start * ip - GOT end */ add r5, r5, r0 - add r6, r6, r0 + add r11, r11, r0 add ip, ip, r0 #ifndef CONFIG_ZBOOT_ROM @@ -205,10 +206,10 @@ not_angel: /* * Relocate all entries in the GOT table. */ -1: ldr r1, [r6, #0] @ relocate entries in the GOT +1: ldr r1, [r11, #0] @ relocate entries in the GOT add r1, r1, r0 @ table. This fixes up the - str r1, [r6], #4 @ C references. - cmp r6, ip + str r1, [r11], #4 @ C references. + cmp r11, ip blo 1b #else @@ -216,12 +217,12 @@ not_angel: * Relocate entries in the GOT table. We only relocate * the entries that are outside the (relocated) BSS region. */ -1: ldr r1, [r6, #0] @ relocate entries in the GOT +1: ldr r1, [r11, #0] @ relocate entries in the GOT cmp r1, r2 @ entry < bss_start || cmphs r3, r1 @ _end < entry addlo r1, r1, r0 @ table. This fixes up the - str r1, [r6], #4 @ C references. - cmp r6, ip + str r1, [r11], #4 @ C references. + cmp r11, ip blo 1b #endif @@ -247,6 +248,7 @@ not_relocated: mov r0, #0 * Check to see if we will overwrite ourselves. * r4 = final kernel address * r5 = start of this image + * r6 = size of decompressed image * r2 = end of malloc space (and therefore this image) * We basically want: * r4 >= r2 -> OK @@ -254,8 +256,7 @@ not_relocated: mov r0, #0 */ cmp r4, r2 bhs wont_overwrite - sub r3, sp, r5 @ > compressed kernel size - add r0, r4, r3, lsl #2 @ allow for 4x expansion + add r0, r4, r6 cmp r0, r5 bls wont_overwrite @@ -271,7 +272,6 @@ not_relocated: mov r0, #0 * r1-r3 = unused * r4 = kernel execution address * r5 = decompressed kernel start - * r6 = processor ID * r7 = architecture ID * r8 = atags pointer * r9-r12,r14 = corrupted @@ -312,7 +312,8 @@ LC0: .word LC0 @ r1 .word _end @ r3 .word zreladdr @ r4 .word _start @ r5 - .word _got_start @ r6 + .word _image_size @ r6 + .word _got_start @ r11 .word _got_end @ ip .word user_stack+4096 @ sp LC1: .word reloc_end - reloc_start @@ -336,7 +337,6 @@ params: ldr r0, =params_phys * * On entry, * r4 = kernel execution address - * r6 = processor ID * r7 = architecture number * r8 = atags pointer * r9 = run-time address of "start" (???) @@ -542,7 +542,6 @@ __common_mmu_cache_on: * r1-r3 = unused * r4 = kernel execution address * r5 = decompressed kernel start - * r6 = processor ID * r7 = architecture ID * r8 = atags pointer * r9-r12,r14 = corrupted @@ -581,19 +580,19 @@ call_kernel: bl cache_clean_flush * r1 = corrupted * r2 = corrupted * r3 = block offset - * r6 = corrupted + * r9 = corrupted * r12 = corrupted */ call_cache_fn: adr r12, proc_types #ifdef CONFIG_CPU_CP15 - mrc p15, 0, r6, c0, c0 @ get processor ID + mrc p15, 0, r9, c0, c0 @ get processor ID #else - ldr r6, =CONFIG_PROCESSOR_ID + ldr r9, =CONFIG_PROCESSOR_ID #endif 1: ldr r1, [r12, #0] @ get value ldr r2, [r12, #4] @ get mask - eor r1, r1, r6 @ (real ^ match) + eor r1, r1, r9 @ (real ^ match) tst r1, r2 @ & mask ARM( addeq pc, r12, r3 ) @ call cache function THUMB( addeq r12, r3 ) @@ -778,8 +777,7 @@ proc_types: * Turn off the Cache and MMU. ARMv3 does not support * reading the control register, but ARMv4 does. * - * On entry, r6 = processor ID - * On exit, r0, r1, r2, r3, r12 corrupted + * On exit, r0, r1, r2, r3, r9, r12 corrupted * This routine must preserve: r4, r6, r7 */ .align 5 @@ -852,10 +850,8 @@ __armv3_mmu_cache_off: /* * Clean and flush the cache to maintain consistency. * - * On entry, - * r6 = processor ID * On exit, - * r1, r2, r3, r11, r12 corrupted + * r1, r2, r3, r9, r11, r12 corrupted * This routine must preserve: * r0, r4, r5, r6, r7 */ @@ -967,7 +963,7 @@ __armv4_mmu_cache_flush: mov r2, #64*1024 @ default: 32K dcache size (*2) mov r11, #32 @ default: 32 byte line size mrc p15, 0, r3, c0, c0, 1 @ read cache type - teq r3, r6 @ cache ID register present? + teq r3, r9 @ cache ID register present? beq no_cache_id mov r1, r3, lsr #18 and r1, r1, #7 diff --git a/arch/arm/boot/compressed/vmlinux.lds.in b/arch/arm/boot/compressed/vmlinux.lds.in index 7ca9ecf..d081689 100644 --- a/arch/arm/boot/compressed/vmlinux.lds.in +++ b/arch/arm/boot/compressed/vmlinux.lds.in @@ -43,6 +43,9 @@ SECTIONS _etext = .; + /* Assume size of decompressed image is 4x the compressed image */ + _image_size = (_etext - _text) * 4; + _got_start = .; .got : { *(.got) } _got_end = .; |