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Commit a0a55682 authored by Russell King's avatar Russell King
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Merge branch 'hotplug' into devel 

Conflicts:
	arch/arm/kernel/head-common.S
parents 23beab76 865a4fae
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arch/arm/kernel/head-common.S
View file @ a0a55682
......@@ -15,55 +15,6 @@
#define ATAG_CORE_SIZE ((2*4 + 3*4) >> 2)
#define ATAG_CORE_SIZE_EMPTY ((2*4) >> 2)
.align 2
.type __switch_data, %object
__switch_data:
.long __mmap_switched
.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
.long cr_alignment @ r7
.long init_thread_union + THREAD_START_SP @ sp
/*
* The following fragment of code is executed with the MMU on in MMU mode,
* and uses absolute addresses; this is not position independent.
*
* r0 = cp#15 control register
* r1 = machine ID
* r2 = atags pointer
* r9 = processor ID
*/
__mmap_switched:
adr r3, __switch_data + 4
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
bic r4, r0, #CR_A @ Clear 'A' bit
stmia r7, {r0, r4} @ Save control register values
b start_kernel
ENDPROC(__mmap_switched)
/*
* Exception handling. Something went wrong and we can't proceed. We
* ought to tell the user, but since we don't have any guarantee that
......@@ -73,21 +24,7 @@ ENDPROC(__mmap_switched)
* and hope for the best (useful if bootloader fails to pass a proper
* machine ID for example).
*/
__error_p:
#ifdef CONFIG_DEBUG_LL
adr r0, str_p1
bl printascii
mov r0, r9
bl printhex8
adr r0, str_p2
bl printascii
b __error
str_p1: .asciz "\nError: unrecognized/unsupported processor variant (0x"
str_p2: .asciz ").\n"
.align
#endif
ENDPROC(__error_p)
__HEAD
__error_a:
#ifdef CONFIG_DEBUG_LL
mov r4, r1 @ preserve machine ID
......@@ -97,7 +34,7 @@ __error_a:
bl printhex8
adr r0, str_a2
bl printascii
adr r3, 4f
adr r3, __lookup_machine_type_data
ldmia r3, {r4, r5, r6} @ get machine desc list
sub r4, r3, r4 @ get offset between virt&phys
add r5, r5, r4 @ convert virt addresses to
......@@ -125,78 +62,6 @@ str_a3: .asciz "\nPlease check your kernel config and/or bootloader.\n"
.align
#endif
__error:
#ifdef CONFIG_ARCH_RPC
/*
* Turn the screen red on a error - RiscPC only.
*/
mov r0, #0x02000000
mov r3, #0x11
orr r3, r3, r3, lsl #8
orr r3, r3, r3, lsl #16
str r3, [r0], #4
str r3, [r0], #4
str r3, [r0], #4
str r3, [r0], #4
#endif
1: mov r0, r0
b 1b
ENDPROC(__error)
/*
* Read processor ID register (CP#15, CR0), and look up in the linker-built
* supported processor list. Note that we can't use the absolute addresses
* for the __proc_info lists since we aren't running with the MMU on
* (and therefore, we are not in the correct address space). We have to
* calculate the offset.
*
* r9 = cpuid
* Returns:
* r3, r4, r6 corrupted
* r5 = proc_info pointer in physical address space
* r9 = cpuid (preserved)
*/
__lookup_processor_type:
adr r3, 3f
ldmia r3, {r5 - r7}
add r3, r3, #8
sub r3, r3, r7 @ get offset between virt&phys
add r5, r5, r3 @ convert virt addresses to
add r6, r6, r3 @ physical address space
1: ldmia r5, {r3, r4} @ value, mask
and r4, r4, r9 @ mask wanted bits
teq r3, r4
beq 2f
add r5, r5, #PROC_INFO_SZ @ sizeof(proc_info_list)
cmp r5, r6
blo 1b
mov r5, #0 @ unknown processor
2: mov pc, lr
ENDPROC(__lookup_processor_type)
/*
* This provides a C-API version of the above function.
*/
ENTRY(lookup_processor_type)
stmfd sp!, {r4 - r7, r9, lr}
mov r9, r0
bl __lookup_processor_type
mov r0, r5
ldmfd sp!, {r4 - r7, r9, pc}
ENDPROC(lookup_processor_type)
/*
* Look in <asm/procinfo.h> and arch/arm/kernel/arch.[ch] for
* more information about the __proc_info and __arch_info structures.
*/
.align 2
3: .long __proc_info_begin
.long __proc_info_end
4: .long .
.long __arch_info_begin
.long __arch_info_end
/*
* Lookup machine architecture in the linker-build list of architectures.
* Note that we can't use the absolute addresses for the __arch_info
......@@ -209,7 +74,7 @@ ENDPROC(lookup_processor_type)
* r5 = mach_info pointer in physical address space
*/
__lookup_machine_type:
adr r3, 4b
adr r3, __lookup_machine_type_data
ldmia r3, {r4, r5, r6}
sub r3, r3, r4 @ get offset between virt&phys
add r5, r5, r3 @ convert virt addresses to
......@@ -225,15 +90,16 @@ __lookup_machine_type:
ENDPROC(__lookup_machine_type)
/*
* This provides a C-API version of the above function.
* Look in arch/arm/kernel/arch.[ch] for information about the
* __arch_info structures.
*/
ENTRY(lookup_machine_type)
stmfd sp!, {r4 - r6, lr}
mov r1, r0
bl __lookup_machine_type
mov r0, r5
ldmfd sp!, {r4 - r6, pc}
ENDPROC(lookup_machine_type)
.align 2
.type __lookup_machine_type_data, %object
__lookup_machine_type_data:
.long .
.long __arch_info_begin
.long __arch_info_end
.size __lookup_machine_type_data, . - __lookup_machine_type_data
/* Determine validity of the r2 atags pointer. The heuristic requires
* that the pointer be aligned, in the first 16k of physical RAM and
......@@ -265,3 +131,150 @@ __vet_atags:
1: mov r2, #0
mov pc, lr
ENDPROC(__vet_atags)
/*
* The following fragment of code is executed with the MMU on in MMU mode,
* and uses absolute addresses; this is not position independent.
*
* r0 = cp#15 control register
* r1 = machine ID
* r2 = atags pointer
* r9 = processor ID
*/
__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
bic r4, r0, #CR_A @ Clear 'A' bit
stmia r7, {r0, r4} @ Save control register values
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
.long cr_alignment @ r7
.long init_thread_union + THREAD_START_SP @ sp
.size __mmap_switched_data, . - __mmap_switched_data
/*
* This provides a C-API version of __lookup_machine_type
*/
ENTRY(lookup_machine_type)
stmfd sp!, {r4 - r6, lr}
mov r1, r0
bl __lookup_machine_type
mov r0, r5
ldmfd sp!, {r4 - r6, pc}
ENDPROC(lookup_machine_type)
/*
* This provides a C-API version of __lookup_processor_type
*/
ENTRY(lookup_processor_type)
stmfd sp!, {r4 - r6, r9, lr}
mov r9, r0
bl __lookup_processor_type
mov r0, r5
ldmfd sp!, {r4 - r6, r9, pc}
ENDPROC(lookup_processor_type)
/*
* Read processor ID register (CP#15, CR0), and look up in the linker-built
* supported processor list. Note that we can't use the absolute addresses
* for the __proc_info lists since we aren't running with the MMU on
* (and therefore, we are not in the correct address space). We have to
* calculate the offset.
*
* r9 = cpuid
* Returns:
* r3, r4, r6 corrupted
* r5 = proc_info pointer in physical address space
* r9 = cpuid (preserved)
*/
__CPUINIT
__lookup_processor_type:
adr r3, __lookup_processor_type_data
ldmia r3, {r4 - r6}
sub r3, r3, r4 @ get offset between virt&phys
add r5, r5, r3 @ convert virt addresses to
add r6, r6, r3 @ physical address space
1: ldmia r5, {r3, r4} @ value, mask
and r4, r4, r9 @ mask wanted bits
teq r3, r4
beq 2f
add r5, r5, #PROC_INFO_SZ @ sizeof(proc_info_list)
cmp r5, r6
blo 1b
mov r5, #0 @ unknown processor
2: mov pc, lr
ENDPROC(__lookup_processor_type)
/*
* Look in <asm/procinfo.h> for information about the __proc_info structure.
*/
.align 2
.type __lookup_processor_type_data, %object
__lookup_processor_type_data:
.long .
.long __proc_info_begin
.long __proc_info_end
.size __lookup_processor_type_data, . - __lookup_processor_type_data
__error_p:
#ifdef CONFIG_DEBUG_LL
adr r0, str_p1
bl printascii
mov r0, r9
bl printhex8
adr r0, str_p2
bl printascii
b __error
str_p1: .asciz "\nError: unrecognized/unsupported processor variant (0x"
str_p2: .asciz ").\n"
.align
#endif
ENDPROC(__error_p)
__error:
#ifdef CONFIG_ARCH_RPC
/*
* Turn the screen red on a error - RiscPC only.
*/
mov r0, #0x02000000
mov r3, #0x11
orr r3, r3, r3, lsl #8
orr r3, r3, r3, lsl #16
str r3, [r0], #4
str r3, [r0], #4
str r3, [r0], #4
str r3, [r0], #4
#endif
1: mov r0, r0
b 1b
ENDPROC(__error)
arch/arm/kernel/head-nommu.S
View file @ a0a55682
......@@ -48,8 +48,6 @@ ENTRY(stext)
movs r8, r5 @ invalid machine (r5=0)?
beq __error_a @ yes, error 'a'
ldr r13, __switch_data @ address to jump to after
@ the initialization is done
adr lr, BSYM(__after_proc_init) @ return (PIC) address
ARM( add pc, r10, #PROCINFO_INITFUNC )
THUMB( add r12, r10, #PROCINFO_INITFUNC )
......@@ -87,8 +85,7 @@ __after_proc_init:
mcr p15, 0, r0, c1, c0, 0 @ write control reg
#endif /* CONFIG_CPU_CP15 */
mov r3, r13
mov pc, r3 @ clear the BSS and jump
b __mmap_switched @ clear the BSS and jump
@ to start_kernel
ENDPROC(__after_proc_init)
.ltorg
......
arch/arm/kernel/head.S
View file @ a0a55682
......@@ -98,113 +98,15 @@ ENTRY(stext)
* above. On return, the CPU will be ready for the MMU to be
* turned on, and r0 will hold the CPU control register value.
*/
ldr r13, __switch_data @ address to jump to after
ldr r13, =__mmap_switched @ address to jump to after
@ mmu has been enabled
adr lr, BSYM(__enable_mmu) @ return (PIC) address
adr lr, BSYM(1f) @ return (PIC) address
ARM( add pc, r10, #PROCINFO_INITFUNC )
THUMB( add r12, r10, #PROCINFO_INITFUNC )
THUMB( mov pc, r12 )
1: b __enable_mmu
ENDPROC(stext)
#if defined(CONFIG_SMP)
ENTRY(secondary_startup)
/*
* Common entry point for secondary CPUs.
*
* Ensure that we're in SVC mode, and IRQs are disabled. Lookup
* the processor type - there is no need to check the machine type
* as it has already been validated by the primary processor.
*/
setmode PSR_F_BIT | PSR_I_BIT | SVC_MODE, r9
mrc p15, 0, r9, c0, c0 @ get processor id
bl __lookup_processor_type
movs r10, r5 @ invalid processor?
moveq r0, #'p' @ yes, error 'p'
beq __error
/*
* Use the page tables supplied from __cpu_up.
*/
adr r4, __secondary_data
ldmia r4, {r5, r7, r12} @ address to jump to after
sub r4, r4, r5 @ mmu has been enabled
ldr r4, [r7, r4] @ get secondary_data.pgdir
adr lr, BSYM(__enable_mmu) @ return address
mov r13, r12 @ __secondary_switched address
ARM( add pc, r10, #PROCINFO_INITFUNC ) @ initialise processor
@ (return control reg)
THUMB( add r12, r10, #PROCINFO_INITFUNC )
THUMB( mov pc, r12 )
ENDPROC(secondary_startup)
/*
* r6 = &secondary_data
*/
ENTRY(__secondary_switched)
ldr sp, [r7, #4] @ get secondary_data.stack
mov fp, #0
b secondary_start_kernel
ENDPROC(__secondary_switched)
.type __secondary_data, %object
__secondary_data:
.long .
.long secondary_data
.long __secondary_switched
#endif /* defined(CONFIG_SMP) */
/*
* Setup common bits before finally enabling the MMU. Essentially
* this is just loading the page table pointer and domain access
* registers.
*/
__enable_mmu:
#ifdef CONFIG_ALIGNMENT_TRAP
orr r0, r0, #CR_A
#else
bic r0, r0, #CR_A
#endif
#ifdef CONFIG_CPU_DCACHE_DISABLE
bic r0, r0, #CR_C
#endif
#ifdef CONFIG_CPU_BPREDICT_DISABLE
bic r0, r0, #CR_Z
#endif
#ifdef CONFIG_CPU_ICACHE_DISABLE
bic r0, r0, #CR_I
#endif
mov r5, #(domain_val(DOMAIN_USER, DOMAIN_MANAGER) | \
domain_val(DOMAIN_KERNEL, DOMAIN_MANAGER) | \
domain_val(DOMAIN_TABLE, DOMAIN_MANAGER) | \
domain_val(DOMAIN_IO, DOMAIN_CLIENT))
mcr p15, 0, r5, c3, c0, 0 @ load domain access register
mcr p15, 0, r4, c2, c0, 0 @ load page table pointer
b __turn_mmu_on
ENDPROC(__enable_mmu)
/*
* Enable the MMU. This completely changes the structure of the visible
* memory space. You will not be able to trace execution through this.
* If you have an enquiry about this, *please* check the linux-arm-kernel
* mailing list archives BEFORE sending another post to the list.
*
* r0 = cp#15 control register
* r13 = *virtual* address to jump to upon completion
*
* other registers depend on the function called upon completion
*/
.align 5
__turn_mmu_on:
mov r0, r0
mcr p15, 0, r0, c1, c0, 0 @ write control reg
mrc p15, 0, r3, c0, c0, 0 @ read id reg
mov r3, r3
mov r3, r13
mov pc, r3
ENDPROC(__turn_mmu_on)
.ltorg
/*
* Setup the initial page tables. We only setup the barest
......@@ -216,7 +118,7 @@ ENDPROC(__turn_mmu_on)
* r10 = procinfo
*
* Returns:
* r0, r3, r6, r7 corrupted
* r0, r3, r5-r7 corrupted
* r4 = physical page table address
*/
__create_page_tables:
......@@ -238,20 +140,30 @@ __create_page_tables:
ldr r7, [r10, #PROCINFO_MM_MMUFLAGS] @ mm_mmuflags
/*
* Create identity mapping for first MB of kernel to
* cater for the MMU enable. This identity mapping
* will be removed by paging_init(). We use our current program
* counter to determine corresponding section base address.
* Create identity mapping to cater for __enable_mmu.
* This identity mapping will be removed by paging_init().
*/
mov r6, pc
mov r6, r6, lsr #20 @ start of kernel section
orr r3, r7, r6, lsl #20 @ flags + kernel base
str r3, [r4, r6, lsl #2] @ identity mapping
adr r0, __enable_mmu_loc
ldmia r0, {r3, r5, r6}
sub r0, r0, r3 @ virt->phys offset
add r5, r5, r0 @ phys __enable_mmu
add r6, r6, r0 @ phys __enable_mmu_end
mov r5, r5, lsr #20
mov r6, r6, lsr #20
1: orr r3, r7, r5, lsl #20 @ flags + kernel base
str r3, [r4, r5, lsl #2] @ identity mapping
teq r5, r6
addne r5, r5, #1 @ next section
bne 1b
/*
* Now setup the pagetables for our kernel direct
* mapped region.
*/
mov r3, pc
mov r3, r3, lsr #20
orr r3, r7, r3, lsl #20
add r0, r4, #(KERNEL_START & 0xff000000) >> 18
str r3, [r0, #(KERNEL_START & 0x00f00000) >> 18]!
ldr r6, =(KERNEL_END - 1)
......@@ -335,6 +247,122 @@ __create_page_tables:
mov pc, lr
ENDPROC(__create_page_tables)
.ltorg
__enable_mmu_loc:
.long .
.long __enable_mmu
.long __enable_mmu_end
#if defined(CONFIG_SMP)
__CPUINIT
ENTRY(secondary_startup)
/*
* Common entry point for secondary CPUs.
*
* Ensure that we're in SVC mode, and IRQs are disabled. Lookup
* the processor type - there is no need to check the machine type
* as it has already been validated by the primary processor.
*/
setmode PSR_F_BIT | PSR_I_BIT | SVC_MODE, r9
mrc p15, 0, r9, c0, c0 @ get processor id
bl __lookup_processor_type
movs r10, r5 @ invalid processor?
moveq r0, #'p' @ yes, error 'p'
beq __error_p
/*
* Use the page tables supplied from __cpu_up.
*/
adr r4, __secondary_data
ldmia r4, {r5, r7, r12} @ address to jump to after
sub r4, r4, r5 @ mmu has been enabled
ldr r4, [r7, r4] @ get secondary_data.pgdir
adr lr, BSYM(__enable_mmu) @ return address
mov r13, r12 @ __secondary_switched address
ARM( add pc, r10, #PROCINFO_INITFUNC ) @ initialise processor
@ (return control reg)
THUMB( add r12, r10, #PROCINFO_INITFUNC )
THUMB( mov pc, r12 )
ENDPROC(secondary_startup)
/*
* r6 = &secondary_data
*/
ENTRY(__secondary_switched)
ldr sp, [r7, #4] @ get secondary_data.stack
mov fp, #0
b secondary_start_kernel
ENDPROC(__secondary_switched)
.type __secondary_data, %object
__secondary_data:
.long .
.long secondary_data
.long __secondary_switched
#endif /* defined(CONFIG_SMP) */
/*
* Setup common bits before finally enabling the MMU. Essentially
* this is just loading the page table pointer and domain access
* registers.
*
* r0 = cp#15 control register
* r1 = machine ID
* r2 = atags pointer
* r4 = page table pointer
* r9 = processor ID
* r13 = *virtual* address to jump to upon completion
*/
__enable_mmu:
#ifdef CONFIG_ALIGNMENT_TRAP
orr r0, r0, #CR_A
#else
bic r0, r0, #CR_A
#endif
#ifdef CONFIG_CPU_DCACHE_DISABLE
bic r0, r0, #CR_C
#endif
#ifdef CONFIG_CPU_BPREDICT_DISABLE
bic r0, r0, #CR_Z
#endif
#ifdef CONFIG_CPU_ICACHE_DISABLE
bic r0, r0, #CR_I
#endif
mov r5, #(domain_val(DOMAIN_USER, DOMAIN_MANAGER) | \
domain_val(DOMAIN_KERNEL, DOMAIN_MANAGER) | \
domain_val(DOMAIN_TABLE, DOMAIN_MANAGER) | \
domain_val(DOMAIN_IO, DOMAIN_CLIENT))
mcr p15, 0, r5, c3, c0, 0 @ load domain access register
mcr p15, 0, r4, c2, c0, 0 @ load page table pointer
b __turn_mmu_on
ENDPROC(__enable_mmu)
/*
* Enable the MMU. This completely changes the structure of the visible
* memory space. You will not be able to trace execution through this.
* If you have an enquiry about this, *please* check the linux-arm-kernel
* mailing list archives BEFORE sending another post to the list.
*
* r0 = cp#15 control register
* r1 = machine ID
* r2 = atags pointer
* r9 = processor ID
* r13 = *virtual* address to jump to upon completion
*
* other registers depend on the function called upon completion
*/
.align 5
__turn_mmu_on:
mov r0, r0
mcr p15, 0, r0, c1, c0, 0 @ write control reg
mrc p15, 0, r3, c0, c0, 0 @ read id reg
mov r3, r3
mov r3, r13
mov pc, r3
__enable_mmu_end:
ENDPROC(__turn_mmu_on)
#ifdef CONFIG_SMP_ON_UP
__fixup_smp:
......
arch/arm/kernel/smp.c
View file @ a0a55682
......@@ -33,6 +33,7 @@
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/processor.h>
#include <asm/sections.h>
#include <asm/tlbflush.h>
#include <asm/ptrace.h>
#include <asm/localtimer.h>
......@@ -67,12 +68,47 @@ enum ipi_msg_type {
IPI_CPU_STOP,
};
static inline void identity_mapping_add(pgd_t *pgd, unsigned long start,
unsigned long end)
{
unsigned long addr, prot;
pmd_t *pmd;
prot = PMD_TYPE_SECT | PMD_SECT_AP_WRITE;
if (cpu_architecture() <= CPU_ARCH_ARMv5TEJ && !cpu_is_xscale())
prot |= PMD_BIT4;
for (addr = start & PGDIR_MASK; addr < end;) {
pmd = pmd_offset(pgd + pgd_index(addr), addr);
pmd[0] = __pmd(addr | prot);
addr += SECTION_SIZE;
pmd[1] = __pmd(addr | prot);
addr += SECTION_SIZE;
flush_pmd_entry(pmd);
outer_clean_range(__pa(pmd), __pa(pmd + 1));
}
}
static inline void identity_mapping_del(pgd_t *pgd, unsigned long start,
unsigned long end)
{
unsigned long addr;
pmd_t *pmd;
for (addr = start & PGDIR_MASK; addr < end; addr += PGDIR_SIZE) {
pmd = pmd_offset(pgd + pgd_index(addr), addr);
pmd[0] = __pmd(0);
pmd[1] = __pmd(0);
clean_pmd_entry(pmd);
outer_clean_range(__pa(pmd), __pa(pmd + 1));
}
}
int __cpuinit __cpu_up(unsigned int cpu)
{
struct cpuinfo_arm *ci = &per_cpu(cpu_data, cpu);
struct task_struct *idle = ci->idle;
pgd_t *pgd;
pmd_t *pmd;
int ret;
/*
......@@ -101,11 +137,16 @@ int __cpuinit __cpu_up(unsigned int cpu)
* a 1:1 mapping for the physical address of the kernel.
*/
pgd = pgd_alloc(&init_mm);
pmd = pmd_offset(pgd + pgd_index(PHYS_OFFSET), PHYS_OFFSET);
*pmd = __pmd((PHYS_OFFSET & PGDIR_MASK) |
PMD_TYPE_SECT | PMD_SECT_AP_WRITE);
flush_pmd_entry(pmd);
outer_clean_range(__pa(pmd), __pa(pmd + 1));
if (!pgd)
return -ENOMEM;
if (PHYS_OFFSET != PAGE_OFFSET) {
#ifndef CONFIG_HOTPLUG_CPU
identity_mapping_add(pgd, __pa(__init_begin), __pa(__init_end));
#endif
identity_mapping_add(pgd, __pa(_stext), __pa(_etext));
identity_mapping_add(pgd, __pa(_sdata), __pa(_edata));
}
/*
* We need to tell the secondary core where to find
......@@ -143,8 +184,14 @@ int __cpuinit __cpu_up(unsigned int cpu)
secondary_data.stack = NULL;
secondary_data.pgdir = 0;
*pmd = __pmd(0);
clean_pmd_entry(pmd);
if (PHYS_OFFSET != PAGE_OFFSET) {
#ifndef CONFIG_HOTPLUG_CPU
identity_mapping_del(pgd, __pa(__init_begin), __pa(__init_end));
#endif
identity_mapping_del(pgd, __pa(_stext), __pa(_etext));
identity_mapping_del(pgd, __pa(_sdata), __pa(_edata));
}
pgd_free(&init_mm, pgd);
if (ret) {
......
arch/arm/kernel/vmlinux.lds.S
View file @ a0a55682
......@@ -8,6 +8,19 @@
#include <asm/memory.h>
#include <asm/page.h>
#define PROC_INFO \
VMLINUX_SYMBOL(__proc_info_begin) = .; \
*(.proc.info.init) \
VMLINUX_SYMBOL(__proc_info_end) = .;
#ifdef CONFIG_HOTPLUG_CPU
#define ARM_CPU_DISCARD(x)
#define ARM_CPU_KEEP(x) x
#else
#define ARM_CPU_DISCARD(x) x
#define ARM_CPU_KEEP(x)
#endif
OUTPUT_ARCH(arm)
ENTRY(stext)
......@@ -31,9 +44,7 @@ SECTIONS
HEAD_TEXT
INIT_TEXT
_einittext = .;
__proc_info_begin = .;
*(.proc.info.init)
__proc_info_end = .;
ARM_CPU_DISCARD(PROC_INFO)
__arch_info_begin = .;
*(.arch.info.init)
__arch_info_end = .;
......@@ -73,10 +84,8 @@ SECTIONS
/DISCARD/ : {
*(.ARM.exidx.exit.text)
*(.ARM.extab.exit.text)
#ifndef CONFIG_HOTPLUG_CPU
*(.ARM.exidx.cpuexit.text)
*(.ARM.extab.cpuexit.text)
#endif
ARM_CPU_DISCARD(*(.ARM.exidx.cpuexit.text))
ARM_CPU_DISCARD(*(.ARM.extab.cpuexit.text))
#ifndef CONFIG_HOTPLUG
*(.ARM.exidx.devexit.text)
*(.ARM.extab.devexit.text)
......@@ -105,6 +114,7 @@ SECTIONS
*(.glue_7)
*(.glue_7t)
*(.got) /* Global offset table */
ARM_CPU_KEEP(PROC_INFO)
}
RO_DATA(PAGE_SIZE)
......
arch/arm/mm/proc-arm1020.S
View file @ a0a55682
......@@ -430,7 +430,7 @@ ENTRY(cpu_arm1020_set_pte_ext)
#endif /* CONFIG_MMU */
mov pc, lr
__INIT
__CPUINIT
.type __arm1020_setup, #function
__arm1020_setup:
......
arch/arm/mm/proc-arm1020e.S
View file @ a0a55682
......@@ -412,7 +412,7 @@ ENTRY(cpu_arm1020e_set_pte_ext)
#endif /* CONFIG_MMU */
mov pc, lr
__INIT
__CPUINIT
.type __arm1020e_setup, #function
__arm1020e_setup:
......
arch/arm/mm/proc-arm1022.S
View file @ a0a55682
......@@ -394,7 +394,7 @@ ENTRY(cpu_arm1022_set_pte_ext)
#endif /* CONFIG_MMU */
mov pc, lr
__INIT
__CPUINIT
.type __arm1022_setup, #function
__arm1022_setup:
......
arch/arm/mm/proc-arm1026.S
View file @ a0a55682
......@@ -384,7 +384,7 @@ ENTRY(cpu_arm1026_set_pte_ext)
mov pc, lr
__INIT
__CPUINIT
.type __arm1026_setup, #function
__arm1026_setup:
......
arch/arm/mm/proc-arm6_7.S
View file @ a0a55682
......@@ -238,7 +238,7 @@ ENTRY(cpu_arm7_reset)
mcr p15, 0, r1, c1, c0, 0 @ turn off MMU etc
mov pc, r0
__INIT
__CPUINIT
.type __arm6_setup, #function
__arm6_setup: mov r0, #0
......
arch/arm/mm/proc-arm720.S
View file @ a0a55682
......@@ -113,7 +113,7 @@ ENTRY(cpu_arm720_reset)
mcr p15, 0, ip, c1, c0, 0 @ ctrl register
mov pc, r0
__INIT
__CPUINIT
.type __arm710_setup, #function
__arm710_setup:
......
arch/arm/mm/proc-arm740.S
View file @ a0a55682
......@@ -55,7 +55,7 @@ ENTRY(cpu_arm740_reset)
mcr p15, 0, ip, c1, c0, 0 @ ctrl register
mov pc, r0
__INIT
__CPUINIT
.type __arm740_setup, #function
__arm740_setup:
......
arch/arm/mm/proc-arm7tdmi.S
View file @ a0a55682
......@@ -46,7 +46,7 @@ ENTRY(cpu_arm7tdmi_proc_fin)
ENTRY(cpu_arm7tdmi_reset)
mov pc, r0
__INIT
__CPUINIT
.type __arm7tdmi_setup, #function
__arm7tdmi_setup:
......
arch/arm/mm/proc-arm920.S
View file @ a0a55682
......@@ -375,7 +375,7 @@ ENTRY(cpu_arm920_set_pte_ext)
#endif
mov pc, lr
__INIT
__CPUINIT
.type __arm920_setup, #function
__arm920_setup:
......
arch/arm/mm/proc-arm922.S
View file @ a0a55682
......@@ -379,7 +379,7 @@ ENTRY(cpu_arm922_set_pte_ext)
#endif /* CONFIG_MMU */
mov pc, lr
__INIT
__CPUINIT
.type __arm922_setup, #function
__arm922_setup:
......
arch/arm/mm/proc-arm925.S
View file @ a0a55682
......@@ -428,7 +428,7 @@ ENTRY(cpu_arm925_set_pte_ext)
#endif /* CONFIG_MMU */
mov pc, lr
__INIT
__CPUINIT
.type __arm925_setup, #function
__arm925_setup:
......
arch/arm/mm/proc-arm926.S
View file @ a0a55682
......@@ -389,7 +389,7 @@ ENTRY(cpu_arm926_set_pte_ext)
#endif
mov pc, lr
__INIT
__CPUINIT
.type __arm926_setup, #function
__arm926_setup:
......
arch/arm/mm/proc-arm940.S
View file @ a0a55682
......@@ -264,7 +264,7 @@ ENTRY(arm940_cache_fns)
.long arm940_dma_unmap_area
.long arm940_dma_flush_range
__INIT
__CPUINIT
.type __arm940_setup, #function
__arm940_setup:
......
arch/arm/mm/proc-arm946.S
View file @ a0a55682
......@@ -317,7 +317,7 @@ ENTRY(cpu_arm946_dcache_clean_area)
mcr p15, 0, r0, c7, c10, 4 @ drain WB
mov pc, lr
__INIT
__CPUINIT
.type __arm946_setup, #function
__arm946_setup:
......
arch/arm/mm/proc-arm9tdmi.S
View file @ a0a55682
......@@ -46,7 +46,7 @@ ENTRY(cpu_arm9tdmi_proc_fin)
ENTRY(cpu_arm9tdmi_reset)
mov pc, r0
__INIT
__CPUINIT
.type __arm9tdmi_setup, #function
__arm9tdmi_setup:
......
arch/arm/mm/proc-fa526.S
View file @ a0a55682
......@@ -134,7 +134,7 @@ ENTRY(cpu_fa526_set_pte_ext)
#endif
mov pc, lr
__INIT
__CPUINIT
.type __fa526_setup, #function
__fa526_setup:
......
arch/arm/mm/proc-feroceon.S
View file @ a0a55682
......@@ -494,7 +494,7 @@ ENTRY(cpu_feroceon_set_pte_ext)
#endif
mov pc, lr
__INIT
__CPUINIT
.type __feroceon_setup, #function
__feroceon_setup:
......
arch/arm/mm/proc-mohawk.S
View file @ a0a55682
......@@ -338,7 +338,7 @@ ENTRY(cpu_mohawk_set_pte_ext)
mcr p15, 0, r0, c7, c10, 4 @ drain WB
mov pc, lr
__INIT
__CPUINIT
.type __mohawk_setup, #function
__mohawk_setup:
......
arch/arm/mm/proc-sa110.S
View file @ a0a55682
......@@ -156,7 +156,7 @@ ENTRY(cpu_sa110_set_pte_ext)
#endif
mov pc, lr
__INIT
__CPUINIT
.type __sa110_setup, #function
__sa110_setup:
......
arch/arm/mm/proc-sa1100.S
View file @ a0a55682
......@@ -169,7 +169,7 @@ ENTRY(cpu_sa1100_set_pte_ext)
#endif
mov pc, lr
__INIT
__CPUINIT
.type __sa1100_setup, #function
__sa1100_setup:
......
arch/arm/mm/proc-v6.S
View file @ a0a55682
......@@ -135,7 +135,7 @@ cpu_pj4_name:
.align
__INIT
__CPUINIT
/*
* __v6_setup
......@@ -193,6 +193,8 @@ __v6_setup:
v6_crval:
crval clear=0x01e0fb7f, mmuset=0x00c0387d, ucset=0x00c0187c
__INITDATA
.type v6_processor_functions, #object
ENTRY(v6_processor_functions)
.word v6_early_abort
......@@ -206,6 +208,8 @@ ENTRY(v6_processor_functions)
.word cpu_v6_set_pte_ext
.size v6_processor_functions, . - v6_processor_functions
.section ".rodata"
.type cpu_arch_name, #object
cpu_arch_name:
.asciz "armv6"
......
arch/arm/mm/proc-v7.S
View file @ a0a55682
......@@ -168,7 +168,7 @@ cpu_v7_name:
.ascii "ARMv7 Processor"
.align
__INIT
__CPUINIT
/*
* __v7_setup
......@@ -325,6 +325,8 @@ v7_crval:
__v7_setup_stack:
.space 4 * 11 @ 11 registers
__INITDATA
.type v7_processor_functions, #object
ENTRY(v7_processor_functions)
.word v7_early_abort
......@@ -338,6 +340,8 @@ ENTRY(v7_processor_functions)
.word cpu_v7_set_pte_ext
.size v7_processor_functions, . - v7_processor_functions
.section ".rodata"
.type cpu_arch_name, #object
cpu_arch_name:
.asciz "armv7"
......
arch/arm/mm/proc-xsc3.S
View file @ a0a55682
......@@ -404,7 +404,7 @@ ENTRY(cpu_xsc3_set_pte_ext)
.align
__INIT
__CPUINIT
.type __xsc3_setup, #function
__xsc3_setup:
......
arch/arm/mm/proc-xscale.S
View file @ a0a55682
......@@ -506,7 +506,7 @@ ENTRY(cpu_xscale_set_pte_ext)
.align
__INIT
__CPUINIT
.type __xscale_setup, #function
__xscale_setup:
......
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