diff options
Diffstat (limited to 'arch/arm/include')
| -rw-r--r-- | arch/arm/include/asm/proc-fns.h | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/arch/arm/include/asm/proc-fns.h b/arch/arm/include/asm/proc-fns.h index 75b5f14..1c3cf94 100644 --- a/arch/arm/include/asm/proc-fns.h +++ b/arch/arm/include/asm/proc-fns.h @@ -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); \ }) |
