From 0e056f20f18d0efa5da920f3cf8532adc56d5779 Mon Sep 17 00:00:00 2001 From: Catalin Marinas Date: Fri, 24 Jul 2009 12:32:58 +0100 Subject: [PATCH] Thumb-2: Implement the unified boot code This patch adds the ARM/Thumb-2 unified support for the arch/arm/boot/* files. Signed-off-by: Catalin Marinas --- arch/arm/boot/compressed/head.S | 167 +++++++++++++++++++------------- 1 file changed, 99 insertions(+), 68 deletions(-) diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S index 82f5fcfd9567..bd60e8369879 100644 --- a/arch/arm/boot/compressed/head.S +++ b/arch/arm/boot/compressed/head.S @@ -140,7 +140,8 @@ start: tst r2, #3 @ not user? bne not_angel mov r0, #0x17 @ angel_SWIreason_EnterSVC - swi 0x123456 @ angel_SWI_ARM + ARM( swi 0x123456 ) @ angel_SWI_ARM + THUMB( svc 0xab ) @ angel_SWI_THUMB not_angel: mrs r2, cpsr @ turn off interrupts to orr r2, r2, #0xc0 @ prevent angel from running @@ -161,7 +162,9 @@ not_angel: .text adr r0, LC0 - ldmia r0, {r1, r2, r3, r4, r5, r6, ip, sp} + ARM( ldmia r0, {r1, r2, r3, r4, r5, r6, ip, sp} ) + THUMB( ldmia r0, {r1, r2, r3, r4, r5, r6, ip} ) + THUMB( ldr sp, [r0, #28] ) subs r0, r0, r1 @ calculate the delta offset @ if delta is zero, we are @@ -263,22 +266,25 @@ not_relocated: mov r0, #0 * r6 = processor ID * r7 = architecture ID * r8 = atags pointer - * r9-r14 = corrupted + * r9-r12,r14 = corrupted */ add r1, r5, r0 @ end of decompressed kernel adr r2, reloc_start ldr r3, LC1 add r3, r2, r3 -1: ldmia r2!, {r9 - r14} @ copy relocation code - stmia r1!, {r9 - r14} - ldmia r2!, {r9 - r14} - stmia r1!, {r9 - r14} +1: ldmia r2!, {r9 - r12, r14} @ copy relocation code + stmia r1!, {r9 - r12, r14} + ldmia r2!, {r9 - r12, r14} + stmia r1!, {r9 - r12, r14} cmp r2, r3 blo 1b - add sp, r1, #128 @ relocate the stack + mov sp, r1 + add sp, sp, #128 @ relocate the stack bl cache_clean_flush - add pc, r5, r0 @ call relocation code + ARM( add pc, r5, r0 ) @ call relocation code + THUMB( add r12, r5, r0 ) + THUMB( mov pc, r12 ) @ call relocation code /* * We're not in danger of overwriting ourselves. Do this the simple way. @@ -499,6 +505,7 @@ __arm6_mmu_cache_on: mov pc, r12 __common_mmu_cache_on: +#ifndef CONFIG_THUMB2_KERNEL #ifndef DEBUG orr r0, r0, #0x000d @ Write buffer, mmu #endif @@ -510,6 +517,7 @@ __common_mmu_cache_on: 1: mcr p15, 0, r0, c1, c0, 0 @ load control register mrc p15, 0, r0, c1, c0, 0 @ and read it back to sub pc, lr, r0, lsr #32 @ properly flush pipeline +#endif /* * All code following this line is relocatable. It is relocated by @@ -523,7 +531,7 @@ __common_mmu_cache_on: * r6 = processor ID * r7 = architecture ID * r8 = atags pointer - * r9-r14 = corrupted + * r9-r12,r14 = corrupted */ .align 5 reloc_start: add r9, r5, r0 @@ -532,13 +540,14 @@ reloc_start: add r9, r5, r0 mov r1, r4 1: .rept 4 - ldmia r5!, {r0, r2, r3, r10 - r14} @ relocate kernel - stmia r1!, {r0, r2, r3, r10 - r14} + ldmia r5!, {r0, r2, r3, r10 - r12, r14} @ relocate kernel + stmia r1!, {r0, r2, r3, r10 - r12, r14} .endr cmp r5, r9 blo 1b - add sp, r1, #128 @ relocate the stack + mov sp, r1 + add sp, sp, #128 @ relocate the stack debug_reloc_end call_kernel: bl cache_clean_flush @@ -572,7 +581,9 @@ call_cache_fn: adr r12, proc_types ldr r2, [r12, #4] @ get mask eor r1, r1, r6 @ (real ^ match) tst r1, r2 @ & mask - addeq pc, r12, r3 @ call cache function + ARM( addeq pc, r12, r3 ) @ call cache function + THUMB( addeq r12, r3 ) + THUMB( moveq pc, r12 ) @ call cache function add r12, r12, #4*5 b 1b @@ -595,9 +606,10 @@ call_cache_fn: adr r12, proc_types proc_types: .word 0x41560600 @ ARM6/610 .word 0xffffffe0 - b __arm6_mmu_cache_off @ works, but slow - b __arm6_mmu_cache_off + W(b) __arm6_mmu_cache_off @ works, but slow + W(b) __arm6_mmu_cache_off mov pc, lr + THUMB( nop ) @ b __arm6_mmu_cache_on @ untested @ b __arm6_mmu_cache_off @ b __armv3_mmu_cache_flush @@ -605,76 +617,84 @@ proc_types: .word 0x00000000 @ old ARM ID .word 0x0000f000 mov pc, lr + THUMB( nop ) mov pc, lr + THUMB( nop ) mov pc, lr + THUMB( nop ) .word 0x41007000 @ ARM7/710 .word 0xfff8fe00 - b __arm7_mmu_cache_off - b __arm7_mmu_cache_off + W(b) __arm7_mmu_cache_off + W(b) __arm7_mmu_cache_off mov pc, lr + THUMB( nop ) .word 0x41807200 @ ARM720T (writethrough) .word 0xffffff00 - b __armv4_mmu_cache_on - b __armv4_mmu_cache_off + W(b) __armv4_mmu_cache_on + W(b) __armv4_mmu_cache_off mov pc, lr + THUMB( nop ) .word 0x41007400 @ ARM74x .word 0xff00ff00 - b __armv3_mpu_cache_on - b __armv3_mpu_cache_off - b __armv3_mpu_cache_flush + W(b) __armv3_mpu_cache_on + W(b) __armv3_mpu_cache_off + W(b) __armv3_mpu_cache_flush .word 0x41009400 @ ARM94x .word 0xff00ff00 - b __armv4_mpu_cache_on - b __armv4_mpu_cache_off - b __armv4_mpu_cache_flush + W(b) __armv4_mpu_cache_on + W(b) __armv4_mpu_cache_off + W(b) __armv4_mpu_cache_flush .word 0x00007000 @ ARM7 IDs .word 0x0000f000 mov pc, lr + THUMB( nop ) mov pc, lr + THUMB( nop ) mov pc, lr + THUMB( nop ) @ Everything from here on will be the new ID system. .word 0x4401a100 @ sa110 / sa1100 .word 0xffffffe0 - b __armv4_mmu_cache_on - b __armv4_mmu_cache_off - b __armv4_mmu_cache_flush + W(b) __armv4_mmu_cache_on + W(b) __armv4_mmu_cache_off + W(b) __armv4_mmu_cache_flush .word 0x6901b110 @ sa1110 .word 0xfffffff0 - b __armv4_mmu_cache_on - b __armv4_mmu_cache_off - b __armv4_mmu_cache_flush + W(b) __armv4_mmu_cache_on + W(b) __armv4_mmu_cache_off + W(b) __armv4_mmu_cache_flush .word 0x56056930 .word 0xff0ffff0 @ PXA935 - b __armv4_mmu_cache_on - b __armv4_mmu_cache_off - b __armv4_mmu_cache_flush + W(b) __armv4_mmu_cache_on + W(b) __armv4_mmu_cache_off + W(b) __armv4_mmu_cache_flush .word 0x56158000 @ PXA168 .word 0xfffff000 - b __armv4_mmu_cache_on - b __armv4_mmu_cache_off - b __armv5tej_mmu_cache_flush + W(b) __armv4_mmu_cache_on + W(b) __armv4_mmu_cache_off + W(b) __armv5tej_mmu_cache_flush .word 0x56056930 .word 0xff0ffff0 @ PXA935 - b __armv4_mmu_cache_on - b __armv4_mmu_cache_off - b __armv4_mmu_cache_flush + W(b) __armv4_mmu_cache_on + W(b) __armv4_mmu_cache_off + W(b) __armv4_mmu_cache_flush .word 0x56050000 @ Feroceon .word 0xff0f0000 - b __armv4_mmu_cache_on - b __armv4_mmu_cache_off - b __armv5tej_mmu_cache_flush + W(b) __armv4_mmu_cache_on + W(b) __armv4_mmu_cache_off + W(b) __armv5tej_mmu_cache_flush #ifdef CONFIG_CPU_FEROCEON_OLD_ID /* this conflicts with the standard ARMv5TE entry */ @@ -687,47 +707,50 @@ proc_types: .word 0x66015261 @ FA526 .word 0xff01fff1 - b __fa526_cache_on - b __armv4_mmu_cache_off - b __fa526_cache_flush + W(b) __fa526_cache_on + W(b) __armv4_mmu_cache_off + W(b) __fa526_cache_flush @ These match on the architecture ID .word 0x00020000 @ ARMv4T .word 0x000f0000 - b __armv4_mmu_cache_on - b __armv4_mmu_cache_off - b __armv4_mmu_cache_flush + W(b) __armv4_mmu_cache_on + W(b) __armv4_mmu_cache_off + W(b) __armv4_mmu_cache_flush .word 0x00050000 @ ARMv5TE .word 0x000f0000 - b __armv4_mmu_cache_on - b __armv4_mmu_cache_off - b __armv4_mmu_cache_flush + W(b) __armv4_mmu_cache_on + W(b) __armv4_mmu_cache_off + W(b) __armv4_mmu_cache_flush .word 0x00060000 @ ARMv5TEJ .word 0x000f0000 - b __armv4_mmu_cache_on - b __armv4_mmu_cache_off - b __armv5tej_mmu_cache_flush + W(b) __armv4_mmu_cache_on + W(b) __armv4_mmu_cache_off + W(b) __armv4_mmu_cache_flush .word 0x0007b000 @ ARMv6 .word 0x000ff000 - b __armv4_mmu_cache_on - b __armv4_mmu_cache_off - b __armv6_mmu_cache_flush + 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 - b __armv7_mmu_cache_on - b __armv7_mmu_cache_off - b __armv7_mmu_cache_flush + W(b) __armv7_mmu_cache_on + W(b) __armv7_mmu_cache_off + W(b) __armv7_mmu_cache_flush .word 0 @ unrecognised type .word 0 mov pc, lr + THUMB( nop ) mov pc, lr + THUMB( nop ) mov pc, lr + THUMB( nop ) .size proc_types, . - proc_types @@ -854,7 +877,7 @@ __armv7_mmu_cache_flush: b iflush hierarchical: mcr p15, 0, r10, c7, c10, 5 @ DMB - stmfd sp!, {r0-r5, r7, r9, r11} + stmfd sp!, {r0-r7, r9-r11} mrc p15, 1, r0, c0, c0, 1 @ read clidr ands r3, r0, #0x7000000 @ extract loc from clidr mov r3, r3, lsr #23 @ left align loc bit field @@ -879,8 +902,12 @@ loop1: loop2: mov r9, r4 @ create working copy of max way size loop3: - orr r11, r10, r9, lsl r5 @ factor way and cache number into r11 - orr r11, r11, r7, lsl r2 @ factor index number into r11 + ARM( orr r11, r10, r9, lsl r5 ) @ factor way and cache number into r11 + ARM( orr r11, r11, r7, lsl r2 ) @ factor index number into r11 + THUMB( lsl r6, r9, r5 ) + THUMB( orr r11, r10, r6 ) @ factor way and cache number into r11 + THUMB( lsl r6, r7, r2 ) + THUMB( orr r11, r11, r6 ) @ factor index number into r11 mcr p15, 0, r11, c7, c14, 2 @ clean & invalidate by set/way subs r9, r9, #1 @ decrement the way bge loop3 @@ -891,7 +918,7 @@ skip: cmp r3, r10 bgt loop1 finished: - ldmfd sp!, {r0-r5, r7, r9, r11} + ldmfd sp!, {r0-r7, r9-r11} mov r10, #0 @ swith back to cache level 0 mcr p15, 2, r10, c0, c0, 0 @ select current cache level in cssr iflush: @@ -925,9 +952,13 @@ __armv4_mmu_cache_flush: mov r11, #8 mov r11, r11, lsl r3 @ cache line size in bytes no_cache_id: - bic r1, pc, #63 @ align to longest cache line + mov r1, pc + bic r1, r1, #63 @ align to longest cache line add r2, r1, r2 -1: ldr r3, [r1], r11 @ s/w flush D cache +1: + ARM( ldr r3, [r1], r11 ) @ s/w flush D cache + THUMB( ldr r3, [r1] ) @ s/w flush D cache + THUMB( add r1, r1, r11 ) teq r1, r2 bne 1b -- GitLab