ARM: move __mmap_switched, C-API functions to init section
Move these functions, which are only ever used during boot CPU initialization, to the init section. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Russell King
parent
a4ae41341f
commit
17bb5e2c17
1 changed files with 72 additions and 70 deletions
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@ -15,54 +15,6 @@
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#define ATAG_CORE_SIZE ((2*4 + 3*4) >> 2)
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#define ATAG_CORE_SIZE_EMPTY ((2*4) >> 2)
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.align 2
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.type __switch_data, %object
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__switch_data:
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.long __data_loc @ r4
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.long _data @ r5
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.long __bss_start @ r6
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.long _end @ r7
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.long processor_id @ r4
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.long __machine_arch_type @ r5
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.long __atags_pointer @ r6
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.long cr_alignment @ r7
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.long init_thread_union + THREAD_START_SP @ sp
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/*
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* The following fragment of code is executed with the MMU on in MMU mode,
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* and uses absolute addresses; this is not position independent.
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*
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* r0 = cp#15 control register
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* r1 = machine ID
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* r2 = atags pointer
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* r9 = processor ID
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*/
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__mmap_switched:
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adr r3, __switch_data
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ldmia r3!, {r4, r5, r6, r7}
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cmp r4, r5 @ Copy data segment if needed
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1: cmpne r5, r6
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ldrne fp, [r4], #4
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strne fp, [r5], #4
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bne 1b
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mov fp, #0 @ Clear BSS (and zero fp)
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1: cmp r6, r7
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strcc fp, [r6],#4
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bcc 1b
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ARM( ldmia r3, {r4, r5, r6, r7, sp})
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THUMB( ldmia r3, {r4, r5, r6, r7} )
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THUMB( ldr sp, [r3, #16] )
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str r9, [r4] @ Save processor ID
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str r1, [r5] @ Save machine type
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str r2, [r6] @ Save atags pointer
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bic r4, r0, #CR_A @ Clear 'A' bit
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stmia r7, {r0, r4} @ Save control register values
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b start_kernel
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ENDPROC(__mmap_switched)
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/*
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* Exception handling. Something went wrong and we can't proceed. We
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* ought to tell the user, but since we don't have any guarantee that
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@ -143,17 +95,6 @@ __error:
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ENDPROC(__error)
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/*
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* This provides a C-API version of __lookup_processor_type
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*/
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ENTRY(lookup_processor_type)
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stmfd sp!, {r4 - r6, r9, lr}
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mov r9, r0
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bl __lookup_processor_type
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mov r0, r5
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ldmfd sp!, {r4 - r6, r9, pc}
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ENDPROC(lookup_processor_type)
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/*
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* Look in <asm/procinfo.h> and arch/arm/kernel/arch.[ch] for
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* more information about the __proc_info and __arch_info structures.
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@ -190,17 +131,6 @@ __lookup_machine_type:
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2: mov pc, lr
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ENDPROC(__lookup_machine_type)
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/*
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* This provides a C-API version of the above function.
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*/
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ENTRY(lookup_machine_type)
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stmfd sp!, {r4 - r6, lr}
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mov r1, r0
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bl __lookup_machine_type
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mov r0, r5
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ldmfd sp!, {r4 - r6, pc}
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ENDPROC(lookup_machine_type)
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/* Determine validity of the r2 atags pointer. The heuristic requires
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* that the pointer be aligned, in the first 16k of physical RAM and
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* that the ATAG_CORE marker is first and present. Future revisions
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@ -232,6 +162,78 @@ __vet_atags:
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mov pc, lr
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ENDPROC(__vet_atags)
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/*
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* The following fragment of code is executed with the MMU on in MMU mode,
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* and uses absolute addresses; this is not position independent.
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*
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* r0 = cp#15 control register
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* r1 = machine ID
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* r2 = atags pointer
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* r9 = processor ID
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*/
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__INIT
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__mmap_switched:
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adr r3, __mmap_switched_data
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ldmia r3!, {r4, r5, r6, r7}
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cmp r4, r5 @ Copy data segment if needed
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1: cmpne r5, r6
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ldrne fp, [r4], #4
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strne fp, [r5], #4
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bne 1b
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mov fp, #0 @ Clear BSS (and zero fp)
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1: cmp r6, r7
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strcc fp, [r6],#4
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bcc 1b
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ARM( ldmia r3, {r4, r5, r6, r7, sp})
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THUMB( ldmia r3, {r4, r5, r6, r7} )
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THUMB( ldr sp, [r3, #16] )
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str r9, [r4] @ Save processor ID
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str r1, [r5] @ Save machine type
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str r2, [r6] @ Save atags pointer
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bic r4, r0, #CR_A @ Clear 'A' bit
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stmia r7, {r0, r4} @ Save control register values
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b start_kernel
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ENDPROC(__mmap_switched)
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.align 2
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.type __mmap_switched_data, %object
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__mmap_switched_data:
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.long __data_loc @ r4
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.long _data @ r5
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.long __bss_start @ r6
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.long _end @ r7
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.long processor_id @ r4
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.long __machine_arch_type @ r5
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.long __atags_pointer @ r6
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.long cr_alignment @ r7
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.long init_thread_union + THREAD_START_SP @ sp
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.size __mmap_switched_data, . - __mmap_switched_data
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/*
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* This provides a C-API version of __lookup_machine_type
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*/
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ENTRY(lookup_machine_type)
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stmfd sp!, {r4 - r6, lr}
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mov r1, r0
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bl __lookup_machine_type
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mov r0, r5
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ldmfd sp!, {r4 - r6, pc}
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ENDPROC(lookup_machine_type)
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/*
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* This provides a C-API version of __lookup_processor_type
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*/
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ENTRY(lookup_processor_type)
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stmfd sp!, {r4 - r6, r9, lr}
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mov r9, r0
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bl __lookup_processor_type
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mov r0, r5
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ldmfd sp!, {r4 - r6, r9, pc}
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ENDPROC(lookup_processor_type)
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/*
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* Read processor ID register (CP#15, CR0), and look up in the linker-built
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* supported processor list. Note that we can't use the absolute addresses
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