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Diffstat (limited to 'arch/arm/include/asm/proc-fns.h')
-rw-r--r--arch/arm/include/asm/proc-fns.h26
1 files changed, 19 insertions, 7 deletions
diff --git a/arch/arm/include/asm/proc-fns.h b/arch/arm/include/asm/proc-fns.h
index a6c99fe62b82..5324c1112f3a 100644
--- a/arch/arm/include/asm/proc-fns.h
+++ b/arch/arm/include/asm/proc-fns.h
@@ -60,7 +60,7 @@ extern struct processor {
/*
* Set the page table
*/
- void (*switch_mm)(unsigned long pgd_phys, struct mm_struct *mm);
+ void (*switch_mm)(phys_addr_t pgd_phys, struct mm_struct *mm);
/*
* Set a possibly extended PTE. Non-extended PTEs should
* ignore 'ext'.
@@ -82,7 +82,7 @@ extern void cpu_proc_init(void);
extern void cpu_proc_fin(void);
extern int cpu_do_idle(void);
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_do_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
#ifdef CONFIG_ARM_LPAE
extern void cpu_set_pte_ext(pte_t *ptep, pte_t pte);
#else
@@ -116,13 +116,25 @@ extern void cpu_resume(void);
#define cpu_switch_mm(pgd,mm) cpu_do_switch_mm(virt_to_phys(pgd),mm)
#ifdef CONFIG_ARM_LPAE
+
+#define cpu_get_ttbr(nr) \
+ ({ \
+ u64 ttbr; \
+ __asm__("mrrc p15, " #nr ", %Q0, %R0, c2" \
+ : "=r" (ttbr)); \
+ ttbr; \
+ })
+
+#define cpu_set_ttbr(nr, val) \
+ do { \
+ u64 ttbr = val; \
+ __asm__("mcrr p15, " #nr ", %Q0, %R0, c2" \
+ : : "r" (ttbr)); \
+ } while (0)
+
#define cpu_get_pgd() \
({ \
- unsigned long pg, pg2; \
- __asm__("mrrc p15, 0, %0, %1, c2" \
- : "=r" (pg), "=r" (pg2) \
- : \
- : "cc"); \
+ u64 pg = cpu_get_ttbr(0); \
pg &= ~(PTRS_PER_PGD*sizeof(pgd_t)-1); \
(pgd_t *)phys_to_virt(pg); \
})