Merge branch 'pm' into devel-stable

12 files changed, 197 insertions, 201 deletions

diff --git a/arch/arm/include/asm/proc-fns.h b/arch/arm/include/asm/proc-fns.h
index 633d1cb84d87..9e92cb205e65 100644
--- a/arch/arm/include/asm/proc-fns.h
+++ b/arch/arm/include/asm/proc-fns.h
@@ -81,6 +81,10 @@ extern void cpu_dcache_clean_area(void *, int);
 extern void cpu_do_switch_mm(unsigned long pgd_phys, struct mm_struct *mm);
 extern void cpu_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
 extern void cpu_reset(unsigned long addr) __attribute__((noreturn));
+
+/* These three are private to arch/arm/kernel/suspend.c */
+extern void cpu_do_suspend(void *);
+extern void cpu_do_resume(void *);
 #else
 #define cpu_proc_init                   processor._proc_init
 #define cpu_proc_fin                    processor._proc_fin
@@ -89,6 +93,10 @@ extern void cpu_reset(unsigned long addr) __attribute__((noreturn));
 #define cpu_dcache_clean_area           processor.dcache_clean_area
 #define cpu_set_pte_ext                 processor.set_pte_ext
 #define cpu_do_switch_mm                processor.switch_mm
+
+/* These three are private to arch/arm/kernel/suspend.c */
+#define cpu_do_suspend                  processor.do_suspend
+#define cpu_do_resume                   processor.do_resume
 #endif
 
 extern void cpu_resume(void);
diff --git a/arch/arm/include/asm/suspend.h b/arch/arm/include/asm/suspend.h
index b0e4e1a02318..1c0a551ae375 100644
--- a/arch/arm/include/asm/suspend.h
+++ b/arch/arm/include/asm/suspend.h
@@ -1,22 +1,7 @@
 #ifndef __ASM_ARM_SUSPEND_H
 #define __ASM_ARM_SUSPEND_H
 
-#include <asm/memory.h>
-#include <asm/tlbflush.h>
-
 extern void cpu_resume(void);
-
-/*
- * Hide the first two arguments to __cpu_suspend - these are an implementation
- * detail which platform code shouldn't have to know about.
- */
-static inline int cpu_suspend(unsigned long arg, int (*fn)(unsigned long))
-{
-        extern int __cpu_suspend(int, long, unsigned long,
-                                 int (*)(unsigned long));
-        int ret = __cpu_suspend(0, PHYS_OFFSET - PAGE_OFFSET, arg, fn);
-        flush_tlb_all();
-        return ret;
-}
+extern int cpu_suspend(unsigned long, int (*)(unsigned long));
 
 #endif
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index af32e466e1c1..8fa83f54c967 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -29,7 +29,7 @@ obj-$(CONFIG_MODULES)		+= armksyms.o module.o
 obj-$(CONFIG_ARTHUR)            += arthur.o
 obj-$(CONFIG_ISA_DMA)           += dma-isa.o
 obj-$(CONFIG_PCI)               += bios32.o isa.o
-obj-$(CONFIG_PM_SLEEP)          += sleep.o
+obj-$(CONFIG_PM_SLEEP)          += sleep.o suspend.o
 obj-$(CONFIG_HAVE_SCHED_CLOCK)  += sched_clock.o
 obj-$(CONFIG_SMP)               += smp.o smp_tlb.o
 obj-$(CONFIG_HAVE_ARM_SCU)      += smp_scu.o
diff --git a/arch/arm/kernel/sleep.S b/arch/arm/kernel/sleep.S
index dc902f2c6845..020e99c845e7 100644
--- a/arch/arm/kernel/sleep.S
+++ b/arch/arm/kernel/sleep.S
@@ -8,92 +8,61 @@
         .text
 
 /*
- * Save CPU state for a suspend
- *  r1 = v:p offset
- *  r2 = suspend function arg0
- *  r3 = suspend function
+ * Save CPU state for a suspend.  This saves the CPU general purpose
+ * registers, and allocates space on the kernel stack to save the CPU
+ * specific registers and some other data for resume.
+ *  r0 = suspend function arg0
+ *  r1 = suspend function
  */
 ENTRY(__cpu_suspend)
         stmfd   sp!, {r4 - r11, lr}
 #ifdef MULTI_CPU
         ldr     r10, =processor
-        ldr     r5, [r10, #CPU_SLEEP_SIZE] @ size of CPU sleep state
-        ldr     ip, [r10, #CPU_DO_RESUME] @ virtual resume function
+        ldr     r4, [r10, #CPU_SLEEP_SIZE] @ size of CPU sleep state
 #else
-        ldr     r5, =cpu_suspend_size
-        ldr     ip, =cpu_do_resume
+        ldr     r4, =cpu_suspend_size
 #endif
-        mov     r6, sp                  @ current virtual SP
-        sub     sp, sp, r5              @ allocate CPU state on stack
-        mov     r0, sp                  @ save pointer to CPU save block
-        add     ip, ip, r1              @ convert resume fn to phys
-        stmfd   sp!, {r1, r6, ip}       @ save v:p, virt SP, phys resume fn
-        ldr     r5, =sleep_save_sp
-        add     r6, sp, r1              @ convert SP to phys
-        stmfd   sp!, {r2, r3}           @ save suspend func arg and pointer
+        mov     r5, sp                  @ current virtual SP
+        add     r4, r4, #12             @ Space for pgd, virt sp, phys resume fn
+        sub     sp, sp, r4              @ allocate CPU state on stack
+        stmfd   sp!, {r0, r1}           @ save suspend func arg and pointer
+        add     r0, sp, #8              @ save pointer to save block
+        mov     r1, r4                  @ size of save block
+        mov     r2, r5                  @ virtual SP
+        ldr     r3, =sleep_save_sp
 #ifdef CONFIG_SMP
         ALT_SMP(mrc p15, 0, lr, c0, c0, 5)
         ALT_UP(mov lr, #0)
         and     lr, lr, #15
-        str     r6, [r5, lr, lsl #2]    @ save phys SP
-#else
-        str     r6, [r5]                @ save phys SP
-#endif
-#ifdef MULTI_CPU
-        mov     lr, pc
-        ldr     pc, [r10, #CPU_DO_SUSPEND] @ save CPU state
-#else
-        bl      cpu_do_suspend
-#endif
-
-        @ flush data cache
-#ifdef MULTI_CACHE
-        ldr     r10, =cpu_cache
-        mov     lr, pc
-        ldr     pc, [r10, #CACHE_FLUSH_KERN_ALL]
-#else
-        bl      __cpuc_flush_kern_all
+        add     r3, r3, lr, lsl #2
 #endif
+        bl      __cpu_suspend_save
         adr     lr, BSYM(cpu_suspend_abort)
         ldmfd   sp!, {r0, pc}           @ call suspend fn
 ENDPROC(__cpu_suspend)
         .ltorg
 
 cpu_suspend_abort:
-        ldmia   sp!, {r1 - r3}          @ pop v:p, virt SP, phys resume fn
+        ldmia   sp!, {r1 - r3}          @ pop phys pgd, virt SP, phys resume fn
+        teq     r0, #0
+        moveq   r0, #1                  @ force non-zero value
         mov     sp, r2
         ldmfd   sp!, {r4 - r11, pc}
 ENDPROC(cpu_suspend_abort)
 
 /*
  * r0 = control register value
- * r1 = v:p offset (preserved by cpu_do_resume)
- * r2 = phys page table base
- * r3 = L1 section flags
  */
+        .align  5
 ENTRY(cpu_resume_mmu)
-        adr     r4, cpu_resume_turn_mmu_on
-        mov     r4, r4, lsr #20
-        orr     r3, r3, r4, lsl #20
-        ldr     r5, [r2, r4, lsl #2]    @ save old mapping
-        str     r3, [r2, r4, lsl #2]    @ setup 1:1 mapping for mmu code
-        sub     r2, r2, r1
         ldr     r3, =cpu_resume_after_mmu
-        bic     r1, r0, #CR_C           @ ensure D-cache is disabled
-        b       cpu_resume_turn_mmu_on
-ENDPROC(cpu_resume_mmu)
-        .ltorg
-        .align  5
-cpu_resume_turn_mmu_on:
-        mcr     p15, 0, r1, c1, c0, 0   @ turn on MMU, I-cache, etc
-        mrc     p15, 0, r1, c0, c0, 0   @ read id reg
-        mov     r1, r1
-        mov     r1, r1
+        mcr     p15, 0, r0, c1, c0, 0   @ turn on MMU, I-cache, etc
+        mrc     p15, 0, r0, c0, c0, 0   @ read id reg
+        mov     r0, r0
+        mov     r0, r0
         mov     pc, r3                  @ jump to virtual address
-ENDPROC(cpu_resume_turn_mmu_on)
+ENDPROC(cpu_resume_mmu)
 cpu_resume_after_mmu:
-        str     r5, [r2, r4, lsl #2]    @ restore old mapping
-        mcr     p15, 0, r0, c1, c0, 0   @ turn on D-cache
         bl      cpu_init                @ restore the und/abt/irq banked regs
         mov     r0, #0                  @ return zero on success
         ldmfd   sp!, {r4 - r11, pc}
@@ -119,7 +88,7 @@ ENTRY(cpu_resume)
         ldr     r0, sleep_save_sp       @ stack phys addr
 #endif
         setmode PSR_I_BIT | PSR_F_BIT | SVC_MODE, r1  @ set SVC, irqs off
-        @ load v:p, stack, resume fn
+        @ load phys pgd, stack, resume fn
   ARM(  ldmia   r0!, {r1, sp, pc}       )
 THUMB(  ldmia   r0!, {r1, r2, r3}       )
 THUMB(  mov     sp, r2                  )
diff --git a/arch/arm/kernel/suspend.c b/arch/arm/kernel/suspend.c
new file mode 100644
index 000000000000..93a22d282c16
--- /dev/null
+++ b/arch/arm/kernel/suspend.c
@@ -0,0 +1,72 @@
+#include <linux/init.h>
+
+#include <asm/pgalloc.h>
+#include <asm/pgtable.h>
+#include <asm/memory.h>
+#include <asm/suspend.h>
+#include <asm/tlbflush.h>
+
+static pgd_t *suspend_pgd;
+
+extern int __cpu_suspend(unsigned long, int (*)(unsigned long));
+extern void cpu_resume_mmu(void);
+
+/*
+ * This is called by __cpu_suspend() to save the state, and do whatever
+ * flushing is required to ensure that when the CPU goes to sleep we have
+ * the necessary data available when the caches are not searched.
+ */
+void __cpu_suspend_save(u32 *ptr, u32 ptrsz, u32 sp, u32 *save_ptr)
+{
+        *save_ptr = virt_to_phys(ptr);
+
+        /* This must correspond to the LDM in cpu_resume() assembly */
+        *ptr++ = virt_to_phys(suspend_pgd);
+        *ptr++ = sp;
+        *ptr++ = virt_to_phys(cpu_do_resume);
+
+        cpu_do_suspend(ptr);
+
+        flush_cache_all();
+        outer_clean_range(*save_ptr, *save_ptr + ptrsz);
+        outer_clean_range(virt_to_phys(save_ptr),
+                          virt_to_phys(save_ptr) + sizeof(*save_ptr));
+}
+
+/*
+ * Hide the first two arguments to __cpu_suspend - these are an implementation
+ * detail which platform code shouldn't have to know about.
+ */
+int cpu_suspend(unsigned long arg, int (*fn)(unsigned long))
+{
+        struct mm_struct *mm = current->active_mm;
+        int ret;
+
+        if (!suspend_pgd)
+                return -EINVAL;
+
+        /*
+         * Provide a temporary page table with an identity mapping for
+         * the MMU-enable code, required for resuming.  On successful
+         * resume (indicated by a zero return code), we need to switch
+         * back to the correct page tables.
+         */
+        ret = __cpu_suspend(arg, fn);
+        if (ret == 0) {
+                cpu_switch_mm(mm->pgd, mm);
+                local_flush_tlb_all();
+        }
+
+        return ret;
+}
+
+static int __init cpu_suspend_init(void)
+{
+        suspend_pgd = pgd_alloc(&init_mm);
+        if (suspend_pgd) {
+                unsigned long addr = virt_to_phys(cpu_resume_mmu);
+                identity_mapping_add(suspend_pgd, addr, addr + SECTION_SIZE);
+        }
+        return suspend_pgd ? 0 : -ENOMEM;
+}
+core_initcall(cpu_suspend_init);
diff --git a/arch/arm/mm/proc-arm920.S b/arch/arm/mm/proc-arm920.S
index 2e6849b41f66..88fb3d9e0640 100644
--- a/arch/arm/mm/proc-arm920.S
+++ b/arch/arm/mm/proc-arm920.S
@@ -379,31 +379,26 @@ ENTRY(cpu_arm920_set_pte_ext)
 
 /* Suspend/resume support: taken from arch/arm/plat-s3c24xx/sleep.S */
 .globl  cpu_arm920_suspend_size
-.equ    cpu_arm920_suspend_size, 4 * 4
+.equ    cpu_arm920_suspend_size, 4 * 3
 #ifdef CONFIG_PM_SLEEP
 ENTRY(cpu_arm920_do_suspend)
-        stmfd   sp!, {r4 - r7, lr}
+        stmfd   sp!, {r4 - r6, lr}
         mrc     p15, 0, r4, c13, c0, 0  @ PID
         mrc     p15, 0, r5, c3, c0, 0   @ Domain ID
-        mrc     p15, 0, r6, c2, c0, 0   @ TTB address
-        mrc     p15, 0, r7, c1, c0, 0   @ Control register
-        stmia   r0, {r4 - r7}
-        ldmfd   sp!, {r4 - r7, pc}
+        mrc     p15, 0, r6, c1, c0, 0   @ Control register
+        stmia   r0, {r4 - r6}
+        ldmfd   sp!, {r4 - r6, pc}
 ENDPROC(cpu_arm920_do_suspend)
 
 ENTRY(cpu_arm920_do_resume)
         mov     ip, #0
         mcr     p15, 0, ip, c8, c7, 0   @ invalidate I+D TLBs
         mcr     p15, 0, ip, c7, c7, 0   @ invalidate I+D caches
-        ldmia   r0, {r4 - r7}
+        ldmia   r0, {r4 - r6}
         mcr     p15, 0, r4, c13, c0, 0  @ PID
         mcr     p15, 0, r5, c3, c0, 0   @ Domain ID
-        mcr     p15, 0, r6, c2, c0, 0   @ TTB address
-        mov     r0, r7                  @ control register
-        mov     r2, r6, lsr #14         @ get TTB0 base
-        mov     r2, r2, lsl #14
-        ldr     r3, =PMD_TYPE_SECT | PMD_SECT_BUFFERABLE | \
-                     PMD_SECT_CACHEABLE | PMD_BIT4 | PMD_SECT_AP_WRITE
+        mcr     p15, 0, r1, c2, c0, 0   @ TTB address
+        mov     r0, r6                  @ control register
         b       cpu_resume_mmu
 ENDPROC(cpu_arm920_do_resume)
 #endif
diff --git a/arch/arm/mm/proc-arm926.S b/arch/arm/mm/proc-arm926.S
index cd8f79c3a282..9f8fd91f918a 100644
--- a/arch/arm/mm/proc-arm926.S
+++ b/arch/arm/mm/proc-arm926.S
@@ -394,31 +394,26 @@ ENTRY(cpu_arm926_set_pte_ext)
 
 /* Suspend/resume support: taken from arch/arm/plat-s3c24xx/sleep.S */
 .globl  cpu_arm926_suspend_size
-.equ    cpu_arm926_suspend_size, 4 * 4
+.equ    cpu_arm926_suspend_size, 4 * 3
 #ifdef CONFIG_PM_SLEEP
 ENTRY(cpu_arm926_do_suspend)
-        stmfd   sp!, {r4 - r7, lr}
+        stmfd   sp!, {r4 - r6, lr}
         mrc     p15, 0, r4, c13, c0, 0  @ PID
         mrc     p15, 0, r5, c3, c0, 0   @ Domain ID
-        mrc     p15, 0, r6, c2, c0, 0   @ TTB address
-        mrc     p15, 0, r7, c1, c0, 0   @ Control register
-        stmia   r0, {r4 - r7}
-        ldmfd   sp!, {r4 - r7, pc}
+        mrc     p15, 0, r6, c1, c0, 0   @ Control register
+        stmia   r0, {r4 - r6}
+        ldmfd   sp!, {r4 - r6, pc}
 ENDPROC(cpu_arm926_do_suspend)
 
 ENTRY(cpu_arm926_do_resume)
         mov     ip, #0
         mcr     p15, 0, ip, c8, c7, 0   @ invalidate I+D TLBs
         mcr     p15, 0, ip, c7, c7, 0   @ invalidate I+D caches
-        ldmia   r0, {r4 - r7}
+        ldmia   r0, {r4 - r6}
         mcr     p15, 0, r4, c13, c0, 0  @ PID
         mcr     p15, 0, r5, c3, c0, 0   @ Domain ID
-        mcr     p15, 0, r6, c2, c0, 0   @ TTB address
-        mov     r0, r7                  @ control register
-        mov     r2, r6, lsr #14         @ get TTB0 base
-        mov     r2, r2, lsl #14
-        ldr     r3, =PMD_TYPE_SECT | PMD_SECT_BUFFERABLE | \
-                     PMD_SECT_CACHEABLE | PMD_BIT4 | PMD_SECT_AP_WRITE
+        mcr     p15, 0, r1, c2, c0, 0   @ TTB address
+        mov     r0, r6                  @ control register
         b       cpu_resume_mmu
 ENDPROC(cpu_arm926_do_resume)
 #endif
diff --git a/arch/arm/mm/proc-sa1100.S b/arch/arm/mm/proc-sa1100.S
index 69e7f2ef7384..7d91545d089b 100644
--- a/arch/arm/mm/proc-sa1100.S
+++ b/arch/arm/mm/proc-sa1100.S
@@ -168,20 +168,19 @@ ENTRY(cpu_sa1100_set_pte_ext)
         mov     pc, lr
 
 .globl  cpu_sa1100_suspend_size
-.equ    cpu_sa1100_suspend_size, 4*4
+.equ    cpu_sa1100_suspend_size, 4 * 3
 #ifdef CONFIG_PM_SLEEP
 ENTRY(cpu_sa1100_do_suspend)
-        stmfd   sp!, {r4 - r7, lr}
+        stmfd   sp!, {r4 - r6, lr}
         mrc     p15, 0, r4, c3, c0, 0           @ domain ID
-        mrc     p15, 0, r5, c2, c0, 0           @ translation table base addr
-        mrc     p15, 0, r6, c13, c0, 0          @ PID
-        mrc     p15, 0, r7, c1, c0, 0           @ control reg
-        stmia   r0, {r4 - r7}                   @ store cp regs
-        ldmfd   sp!, {r4 - r7, pc}
+        mrc     p15, 0, r5, c13, c0, 0          @ PID
+        mrc     p15, 0, r6, c1, c0, 0           @ control reg
+        stmia   r0, {r4 - r6}                   @ store cp regs
+        ldmfd   sp!, {r4 - r6, pc}
 ENDPROC(cpu_sa1100_do_suspend)
 
 ENTRY(cpu_sa1100_do_resume)
-        ldmia   r0, {r4 - r7}                   @ load cp regs
+        ldmia   r0, {r4 - r6}                   @ load cp regs
         mov     ip, #0
         mcr     p15, 0, ip, c8, c7, 0           @ flush I+D TLBs
         mcr     p15, 0, ip, c7, c7, 0           @ flush I&D cache
@@ -189,13 +188,9 @@ ENTRY(cpu_sa1100_do_resume)
         mcr     p15, 0, ip, c9, c0, 5           @ allow user space to use RB
 
         mcr     p15, 0, r4, c3, c0, 0           @ domain ID
-        mcr     p15, 0, r5, c2, c0, 0           @ translation table base addr
-        mcr     p15, 0, r6, c13, c0, 0          @ PID
-        mov     r0, r7                          @ control register
-        mov     r2, r5, lsr #14                 @ get TTB0 base
-        mov     r2, r2, lsl #14
-        ldr     r3, =PMD_TYPE_SECT | PMD_SECT_BUFFERABLE | \
-                     PMD_SECT_CACHEABLE | PMD_SECT_AP_WRITE
+        mcr     p15, 0, r1, c2, c0, 0           @ translation table base addr
+        mcr     p15, 0, r5, c13, c0, 0          @ PID
+        mov     r0, r6                          @ control register
         b       cpu_resume_mmu
 ENDPROC(cpu_sa1100_do_resume)
 #endif
diff --git a/arch/arm/mm/proc-v6.S b/arch/arm/mm/proc-v6.S
index a923aa0fd00d..d061d2fa5506 100644
--- a/arch/arm/mm/proc-v6.S
+++ b/arch/arm/mm/proc-v6.S
@@ -128,20 +128,18 @@ ENTRY(cpu_v6_set_pte_ext)
 
 /* Suspend/resume support: taken from arch/arm/mach-s3c64xx/sleep.S */
 .globl  cpu_v6_suspend_size
-.equ    cpu_v6_suspend_size, 4 * 8
+.equ    cpu_v6_suspend_size, 4 * 6
 #ifdef CONFIG_PM_SLEEP
 ENTRY(cpu_v6_do_suspend)
-        stmfd   sp!, {r4 - r11, lr}
+        stmfd   sp!, {r4 - r9, lr}
         mrc     p15, 0, r4, c13, c0, 0  @ FCSE/PID
-        mrc     p15, 0, r5, c13, c0, 1  @ Context ID
-        mrc     p15, 0, r6, c3, c0, 0   @ Domain ID
-        mrc     p15, 0, r7, c2, c0, 0   @ Translation table base 0
-        mrc     p15, 0, r8, c2, c0, 1   @ Translation table base 1
-        mrc     p15, 0, r9, c1, c0, 1   @ auxiliary control register
-        mrc     p15, 0, r10, c1, c0, 2  @ co-processor access control
-        mrc     p15, 0, r11, c1, c0, 0  @ control register
-        stmia   r0, {r4 - r11}
-        ldmfd   sp!, {r4- r11, pc}
+        mrc     p15, 0, r5, c3, c0, 0   @ Domain ID
+        mrc     p15, 0, r6, c2, c0, 1   @ Translation table base 1
+        mrc     p15, 0, r7, c1, c0, 1   @ auxiliary control register
+        mrc     p15, 0, r8, c1, c0, 2   @ co-processor access control
+        mrc     p15, 0, r9, c1, c0, 0   @ control register
+        stmia   r0, {r4 - r9}
+        ldmfd   sp!, {r4- r9, pc}
 ENDPROC(cpu_v6_do_suspend)
 
 ENTRY(cpu_v6_do_resume)
@@ -150,25 +148,21 @@ ENTRY(cpu_v6_do_resume)
         mcr     p15, 0, ip, c7, c5, 0   @ invalidate I cache
         mcr     p15, 0, ip, c7, c15, 0  @ clean+invalidate cache
         mcr     p15, 0, ip, c7, c10, 4  @ drain write buffer
-        ldmia   r0, {r4 - r11}
+        mcr     p15, 0, ip, c13, c0, 1  @ set reserved context ID
+        ldmia   r0, {r4 - r9}
         mcr     p15, 0, r4, c13, c0, 0  @ FCSE/PID
-        mcr     p15, 0, r5, c13, c0, 1  @ Context ID
-        mcr     p15, 0, r6, c3, c0, 0   @ Domain ID
-        mcr     p15, 0, r7, c2, c0, 0   @ Translation table base 0
-        mcr     p15, 0, r8, c2, c0, 1   @ Translation table base 1
-        mcr     p15, 0, r9, c1, c0, 1   @ auxiliary control register
-        mcr     p15, 0, r10, c1, c0, 2  @ co-processor access control
+        mcr     p15, 0, r5, c3, c0, 0   @ Domain ID
+        ALT_SMP(orr     r1, r1, #TTB_FLAGS_SMP)
+        ALT_UP(orr      r1, r1, #TTB_FLAGS_UP)
+        mcr     p15, 0, r1, c2, c0, 0   @ Translation table base 0
+        mcr     p15, 0, r6, c2, c0, 1   @ Translation table base 1
+        mcr     p15, 0, r7, c1, c0, 1   @ auxiliary control register
+        mcr     p15, 0, r8, c1, c0, 2   @ co-processor access control
         mcr     p15, 0, ip, c2, c0, 2   @ TTB control register
         mcr     p15, 0, ip, c7, c5, 4   @ ISB
-        mov     r0, r11                 @ control register
-        mov     r2, r7, lsr #14         @ get TTB0 base
-        mov     r2, r2, lsl #14
-        ldr     r3, cpu_resume_l1_flags
+        mov     r0, r9                  @ control register
         b       cpu_resume_mmu
 ENDPROC(cpu_v6_do_resume)
-cpu_resume_l1_flags:
-        ALT_SMP(.long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_FLAGS_SMP)
-        ALT_UP(.long  PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_FLAGS_UP)
 #endif
 
         string  cpu_v6_name, "ARMv6-compatible processor"
diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S
index 9049c0764db2..6af366ce0165 100644
--- a/arch/arm/mm/proc-v7.S
+++ b/arch/arm/mm/proc-v7.S
@@ -217,56 +217,50 @@ ENDPROC(cpu_v7_set_pte_ext)
 
 /* Suspend/resume support: derived from arch/arm/mach-s5pv210/sleep.S */
 .globl  cpu_v7_suspend_size
-.equ    cpu_v7_suspend_size, 4 * 9
+.equ    cpu_v7_suspend_size, 4 * 7
 #ifdef CONFIG_PM_SLEEP
 ENTRY(cpu_v7_do_suspend)
-        stmfd   sp!, {r4 - r11, lr}
+        stmfd   sp!, {r4 - r10, lr}
         mrc     p15, 0, r4, c13, c0, 0  @ FCSE/PID
-        mrc     p15, 0, r5, c13, c0, 1  @ Context ID
-        mrc     p15, 0, r6, c13, c0, 3  @ User r/o thread ID
-        stmia   r0!, {r4 - r6}
+        mrc     p15, 0, r5, c13, c0, 3  @ User r/o thread ID
+        stmia   r0!, {r4 - r5}
         mrc     p15, 0, r6, c3, c0, 0   @ Domain ID
-        mrc     p15, 0, r7, c2, c0, 0   @ TTB 0
-        mrc     p15, 0, r8, c2, c0, 1   @ TTB 1
-        mrc     p15, 0, r9, c1, c0, 0   @ Control register
-        mrc     p15, 0, r10, c1, c0, 1  @ Auxiliary control register
-        mrc     p15, 0, r11, c1, c0, 2  @ Co-processor access control
-        stmia   r0, {r6 - r11}
-        ldmfd   sp!, {r4 - r11, pc}
+        mrc     p15, 0, r7, c2, c0, 1   @ TTB 1
+        mrc     p15, 0, r8, c1, c0, 0   @ Control register
+        mrc     p15, 0, r9, c1, c0, 1   @ Auxiliary control register
+        mrc     p15, 0, r10, c1, c0, 2  @ Co-processor access control
+        stmia   r0, {r6 - r10}
+        ldmfd   sp!, {r4 - r10, pc}
 ENDPROC(cpu_v7_do_suspend)
 
 ENTRY(cpu_v7_do_resume)
         mov     ip, #0
         mcr     p15, 0, ip, c8, c7, 0   @ invalidate TLBs
         mcr     p15, 0, ip, c7, c5, 0   @ invalidate I cache
-        ldmia   r0!, {r4 - r6}
+        mcr     p15, 0, ip, c13, c0, 1  @ set reserved context ID
+        ldmia   r0!, {r4 - r5}
         mcr     p15, 0, r4, c13, c0, 0  @ FCSE/PID
-        mcr     p15, 0, r5, c13, c0, 1  @ Context ID
-        mcr     p15, 0, r6, c13, c0, 3  @ User r/o thread ID
-        ldmia   r0, {r6 - r11}
+        mcr     p15, 0, r5, c13, c0, 3  @ User r/o thread ID
+        ldmia   r0, {r6 - r10}
         mcr     p15, 0, r6, c3, c0, 0   @ Domain ID
-        mcr     p15, 0, r7, c2, c0, 0   @ TTB 0
-        mcr     p15, 0, r8, c2, c0, 1   @ TTB 1
+        ALT_SMP(orr     r1, r1, #TTB_FLAGS_SMP)
+        ALT_UP(orr      r1, r1, #TTB_FLAGS_UP)
+        mcr     p15, 0, r1, c2, c0, 0   @ TTB 0
+        mcr     p15, 0, r7, c2, c0, 1   @ TTB 1
         mcr     p15, 0, ip, c2, c0, 2   @ TTB control register
         mrc     p15, 0, r4, c1, c0, 1   @ Read Auxiliary control register
-        teq     r4, r10                 @ Is it already set?
-        mcrne   p15, 0, r10, c1, c0, 1  @ No, so write it
-        mcr     p15, 0, r11, c1, c0, 2  @ Co-processor access control
+        teq     r4, r9                  @ Is it already set?
+        mcrne   p15, 0, r9, c1, c0, 1   @ No, so write it
+        mcr     p15, 0, r10, c1, c0, 2  @ Co-processor access control
         ldr     r4, =PRRR               @ PRRR
         ldr     r5, =NMRR               @ NMRR
         mcr     p15, 0, r4, c10, c2, 0  @ write PRRR
         mcr     p15, 0, r5, c10, c2, 1  @ write NMRR
         isb
         dsb
-        mov     r0, r9                  @ control register
-        mov     r2, r7, lsr #14         @ get TTB0 base
-        mov     r2, r2, lsl #14
-        ldr     r3, cpu_resume_l1_flags
+        mov     r0, r8                  @ control register
         b       cpu_resume_mmu
 ENDPROC(cpu_v7_do_resume)
-cpu_resume_l1_flags:
-        ALT_SMP(.long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_FLAGS_SMP)
-        ALT_UP(.long  PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_FLAGS_UP)
 #endif
 
         __CPUINIT
diff --git a/arch/arm/mm/proc-xsc3.S b/arch/arm/mm/proc-xsc3.S
index 755e1bf22681..abf0507a08ae 100644
--- a/arch/arm/mm/proc-xsc3.S
+++ b/arch/arm/mm/proc-xsc3.S
@@ -406,24 +406,23 @@ ENTRY(cpu_xsc3_set_pte_ext)
         .align
 
 .globl  cpu_xsc3_suspend_size
-.equ    cpu_xsc3_suspend_size, 4 * 7
+.equ    cpu_xsc3_suspend_size, 4 * 6
 #ifdef CONFIG_PM_SLEEP
 ENTRY(cpu_xsc3_do_suspend)
-        stmfd   sp!, {r4 - r10, lr}
+        stmfd   sp!, {r4 - r9, lr}
         mrc     p14, 0, r4, c6, c0, 0   @ clock configuration, for turbo mode
         mrc     p15, 0, r5, c15, c1, 0  @ CP access reg
         mrc     p15, 0, r6, c13, c0, 0  @ PID
         mrc     p15, 0, r7, c3, c0, 0   @ domain ID
-        mrc     p15, 0, r8, c2, c0, 0   @ translation table base addr
-        mrc     p15, 0, r9, c1, c0, 1   @ auxiliary control reg
-        mrc     p15, 0, r10, c1, c0, 0  @ control reg
+        mrc     p15, 0, r8, c1, c0, 1   @ auxiliary control reg
+        mrc     p15, 0, r9, c1, c0, 0   @ control reg
         bic     r4, r4, #2              @ clear frequency change bit
-        stmia   r0, {r4 - r10}          @ store cp regs
-        ldmia   sp!, {r4 - r10, pc}
+        stmia   r0, {r4 - r9}           @ store cp regs
+        ldmia   sp!, {r4 - r9, pc}
 ENDPROC(cpu_xsc3_do_suspend)
 
 ENTRY(cpu_xsc3_do_resume)
-        ldmia   r0, {r4 - r10}          @ load cp regs
+        ldmia   r0, {r4 - r9}           @ load cp regs
         mov     ip, #0
         mcr     p15, 0, ip, c7, c7, 0   @ invalidate I & D caches, BTB
         mcr     p15, 0, ip, c7, c10, 4  @ drain write (&fill) buffer
@@ -433,15 +432,10 @@ ENTRY(cpu_xsc3_do_resume)
         mcr     p15, 0, r5, c15, c1, 0  @ CP access reg
         mcr     p15, 0, r6, c13, c0, 0  @ PID
         mcr     p15, 0, r7, c3, c0, 0   @ domain ID
-        mcr     p15, 0, r8, c2, c0, 0   @ translation table base addr
-        mcr     p15, 0, r9, c1, c0, 1   @ auxiliary control reg
-
-        @ temporarily map resume_turn_on_mmu into the page table,
-        @ otherwise prefetch abort occurs after MMU is turned on
-        mov     r0, r10                 @ control register
-        mov     r2, r8, lsr #14         @ get TTB0 base
-        mov     r2, r2, lsl #14
-        ldr     r3, =0x542e             @ section flags
+        orr     r1, r1, #0x18           @ cache the page table in L2
+        mcr     p15, 0, r1, c2, c0, 0   @ translation table base addr
+        mcr     p15, 0, r8, c1, c0, 1   @ auxiliary control reg
+        mov     r0, r9                  @ control register
         b       cpu_resume_mmu
 ENDPROC(cpu_xsc3_do_resume)
 #endif
diff --git a/arch/arm/mm/proc-xscale.S b/arch/arm/mm/proc-xscale.S
index fbc06e55b87a..3277904bebaf 100644
--- a/arch/arm/mm/proc-xscale.S
+++ b/arch/arm/mm/proc-xscale.S
@@ -520,24 +520,23 @@ ENTRY(cpu_xscale_set_pte_ext)
         .align
 
 .globl  cpu_xscale_suspend_size
-.equ    cpu_xscale_suspend_size, 4 * 7
+.equ    cpu_xscale_suspend_size, 4 * 6
 #ifdef CONFIG_PM_SLEEP
 ENTRY(cpu_xscale_do_suspend)
-        stmfd   sp!, {r4 - r10, lr}
+        stmfd   sp!, {r4 - r9, lr}
         mrc     p14, 0, r4, c6, c0, 0   @ clock configuration, for turbo mode
         mrc     p15, 0, r5, c15, c1, 0  @ CP access reg
         mrc     p15, 0, r6, c13, c0, 0  @ PID
         mrc     p15, 0, r7, c3, c0, 0   @ domain ID
-        mrc     p15, 0, r8, c2, c0, 0   @ translation table base addr
-        mrc     p15, 0, r9, c1, c1, 0   @ auxiliary control reg
-        mrc     p15, 0, r10, c1, c0, 0  @ control reg
+        mrc     p15, 0, r8, c1, c1, 0   @ auxiliary control reg
+        mrc     p15, 0, r9, c1, c0, 0   @ control reg
         bic     r4, r4, #2              @ clear frequency change bit
-        stmia   r0, {r4 - r10}          @ store cp regs
-        ldmfd   sp!, {r4 - r10, pc}
+        stmia   r0, {r4 - r9}           @ store cp regs
+        ldmfd   sp!, {r4 - r9, pc}
 ENDPROC(cpu_xscale_do_suspend)
 
 ENTRY(cpu_xscale_do_resume)
-        ldmia   r0, {r4 - r10}          @ load cp regs
+        ldmia   r0, {r4 - r9}           @ load cp regs
         mov     ip, #0
         mcr     p15, 0, ip, c8, c7, 0   @ invalidate I & D TLBs
         mcr     p15, 0, ip, c7, c7, 0   @ invalidate I & D caches, BTB
@@ -545,13 +544,9 @@ ENTRY(cpu_xscale_do_resume)
         mcr     p15, 0, r5, c15, c1, 0  @ CP access reg
         mcr     p15, 0, r6, c13, c0, 0  @ PID
         mcr     p15, 0, r7, c3, c0, 0   @ domain ID
-        mcr     p15, 0, r8, c2, c0, 0   @ translation table base addr
-        mcr     p15, 0, r9, c1, c1, 0   @ auxiliary control reg
-        mov     r0, r10                 @ control register
-        mov     r2, r8, lsr #14         @ get TTB0 base
-        mov     r2, r2, lsl #14
-        ldr     r3, =PMD_TYPE_SECT | PMD_SECT_BUFFERABLE | \
-                     PMD_SECT_CACHEABLE | PMD_SECT_AP_WRITE
+        mcr     p15, 0, r1, c2, c0, 0   @ translation table base addr
+        mcr     p15, 0, r8, c1, c1, 0   @ auxiliary control reg
+        mov     r0, r9                  @ control register
         b       cpu_resume_mmu
 ENDPROC(cpu_xscale_do_resume)
 #endif