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-rw-r--r--arch/arm/kernel/head-common.S86
1 files changed, 54 insertions, 32 deletions
diff --git a/arch/arm/kernel/head-common.S b/arch/arm/kernel/head-common.S
index 8733012d231f..21dde771a7dd 100644
--- a/arch/arm/kernel/head-common.S
+++ b/arch/arm/kernel/head-common.S
@@ -79,47 +79,69 @@ ENDPROC(__vet_atags)
*/
__INIT
__mmap_switched:
- adr r3, __mmap_switched_data
-
- ldmia r3!, {r4, r5, r6, r7}
- cmp r4, r5 @ Copy data segment if needed
-1: cmpne r5, r6
- ldrne fp, [r4], #4
- strne fp, [r5], #4
- bne 1b
-
- mov fp, #0 @ Clear BSS (and zero fp)
-1: cmp r6, r7
- strcc fp, [r6],#4
- bcc 1b
-
- ARM( ldmia r3, {r4, r5, r6, r7, sp})
- THUMB( ldmia r3, {r4, r5, r6, r7} )
- THUMB( ldr sp, [r3, #16] )
- str r9, [r4] @ Save processor ID
- str r1, [r5] @ Save machine type
- str r2, [r6] @ Save atags pointer
- cmp r7, #0
- strne r0, [r7] @ Save control register values
+
+ mov r7, r1
+ mov r8, r2
+ mov r10, r0
+
+ adr r4, __mmap_switched_data
+ mov fp, #0
+
+#if defined(CONFIG_XIP_DEFLATED_DATA)
+ ARM( ldr sp, [r4], #4 )
+ THUMB( ldr sp, [r4] )
+ THUMB( add r4, #4 )
+ bl __inflate_kernel_data @ decompress .data to RAM
+ teq r0, #0
+ bne __error
+#elif defined(CONFIG_XIP_KERNEL)
+ ARM( ldmia r4!, {r0, r1, r2, sp} )
+ THUMB( ldmia r4!, {r0, r1, r2, r3} )
+ THUMB( mov sp, r3 )
+ sub r2, r2, r1
+ bl memcpy @ copy .data to RAM
+#endif
+
+ ARM( ldmia r4!, {r0, r1, sp} )
+ THUMB( ldmia r4!, {r0, r1, r3} )
+ THUMB( mov sp, r3 )
+ sub r1, r1, r0
+ bl __memzero @ clear .bss
+
+ ldmia r4, {r0, r1, r2, r3}
+ str r9, [r0] @ Save processor ID
+ str r7, [r1] @ Save machine type
+ str r8, [r2] @ Save atags pointer
+ cmp r3, #0
+ strne r10, [r3] @ Save control register values
+ mov lr, #0
b start_kernel
ENDPROC(__mmap_switched)
.align 2
.type __mmap_switched_data, %object
__mmap_switched_data:
- .long __data_loc @ r4
- .long _sdata @ r5
- .long __bss_start @ r6
- .long _end @ r7
- .long processor_id @ r4
- .long __machine_arch_type @ r5
- .long __atags_pointer @ r6
+#ifdef CONFIG_XIP_KERNEL
+#ifndef CONFIG_XIP_DEFLATED_DATA
+ .long _sdata @ r0
+ .long __data_loc @ r1
+ .long _edata_loc @ r2
+#endif
+ .long __bss_stop @ sp (temporary stack in .bss)
+#endif
+
+ .long __bss_start @ r0
+ .long __bss_stop @ r1
+ .long init_thread_union + THREAD_START_SP @ sp
+
+ .long processor_id @ r0
+ .long __machine_arch_type @ r1
+ .long __atags_pointer @ r2
#ifdef CONFIG_CPU_CP15
- .long cr_alignment @ r7
+ .long cr_alignment @ r3
#else
- .long 0 @ r7
+ .long 0 @ r3
#endif
- .long init_thread_union + THREAD_START_SP @ sp
.size __mmap_switched_data, . - __mmap_switched_data
/*