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-rw-r--r--arch/arm/boot/compressed/head.S184
1 files changed, 116 insertions, 68 deletions
diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S
index 4515728c534..fa6fbf45cf3 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.
@@ -291,6 +297,7 @@ wont_overwrite: mov r0, r4
bl decompress_kernel
b call_kernel
+ .align 2
.type LC0, #object
LC0: .word LC0 @ r1
.word __bss_start @ r2
@@ -431,6 +438,7 @@ ENDPROC(__setup_mmu)
__armv4_mmu_cache_on:
mov r12, lr
+#ifdef CONFIG_MMU
bl __setup_mmu
mov r0, #0
mcr p15, 0, r0, c7, c10, 4 @ drain write buffer
@@ -444,10 +452,12 @@ __armv4_mmu_cache_on:
bl __common_mmu_cache_on
mov r0, #0
mcr p15, 0, r0, c8, c7, 0 @ flush I,D TLBs
+#endif
mov pc, r12
__armv7_mmu_cache_on:
mov r12, lr
+#ifdef CONFIG_MMU
mrc p15, 0, r11, c0, c1, 4 @ read ID_MMFR0
tst r11, #0xf @ VMSA
blne __setup_mmu
@@ -455,9 +465,11 @@ __armv7_mmu_cache_on:
mcr p15, 0, r0, c7, c10, 4 @ drain write buffer
tst r11, #0xf @ VMSA
mcrne p15, 0, r0, c8, c7, 0 @ flush I,D TLBs
+#endif
mrc p15, 0, r0, c1, c0, 0 @ read control reg
orr r0, r0, #0x5000 @ I-cache enable, RR cache replacement
orr r0, r0, #0x003c @ write buffer
+#ifdef CONFIG_MMU
#ifdef CONFIG_CPU_ENDIAN_BE8
orr r0, r0, #1 << 25 @ big-endian page tables
#endif
@@ -465,6 +477,7 @@ __armv7_mmu_cache_on:
movne r1, #-1
mcrne p15, 0, r3, c2, c0, 0 @ load page table pointer
mcrne p15, 0, r1, c3, c0, 0 @ load domain access control
+#endif
mcr p15, 0, r0, c1, c0, 0 @ load control register
mrc p15, 0, r0, c1, c0, 0 @ and read it back
mov r0, #0
@@ -498,6 +511,7 @@ __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
@@ -509,6 +523,7 @@ __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
@@ -522,7 +537,7 @@ __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
@@ -531,13 +546,14 @@ 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
@@ -571,7 +587,9 @@ 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
@@ -589,13 +607,15 @@ call_cache_fn: adr r12, proc_types
* methods. Writeback caches _must_ have the flush method
* defined.
*/
+ .align 2
.type proc_types,#object
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
@@ -603,76 +623,84 @@ 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 */
@@ -685,47 +713,50 @@ 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
@@ -760,22 +791,30 @@ __armv3_mpu_cache_off:
mov pc, lr
__armv4_mmu_cache_off:
+#ifdef CONFIG_MMU
mrc p15, 0, r0, c1, c0
bic r0, r0, #0x000d
mcr p15, 0, r0, c1, c0 @ turn MMU and cache off
mov r0, #0
mcr p15, 0, r0, c7, c7 @ invalidate whole cache v4
mcr p15, 0, r0, c8, c7 @ invalidate whole TLB v4
+#endif
mov pc, lr
__armv7_mmu_cache_off:
mrc p15, 0, r0, c1, c0
+#ifdef CONFIG_MMU
bic r0, r0, #0x000d
+#else
+ bic r0, r0, #0x000c
+#endif
mcr p15, 0, r0, c1, c0 @ turn MMU and cache off
mov r12, lr
bl __armv7_mmu_cache_flush
mov r0, #0
+#ifdef CONFIG_MMU
mcr p15, 0, r0, c8, c7, 0 @ invalidate whole TLB
+#endif
mcr p15, 0, r0, c7, c5, 6 @ invalidate BTC
mcr p15, 0, r0, c7, c10, 4 @ DSB
mcr p15, 0, r0, c7, c5, 4 @ ISB
@@ -852,7 +891,7 @@ __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
@@ -877,8 +916,12 @@ 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
@@ -889,7 +932,7 @@ 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:
@@ -923,9 +966,13 @@ __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
@@ -945,6 +992,7 @@ __armv3_mpu_cache_flush:
* memory, which again must be relocatable.
*/
#ifdef DEBUG
+ .align 2
.type phexbuf,#object
phexbuf: .space 12
.size phexbuf, . - phexbuf
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-16 00:20:58 +0000