diff options
Diffstat (limited to 'arch/arm64/include/asm/mmu.h')
-rw-r--r-- | arch/arm64/include/asm/mmu.h | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/arch/arm64/include/asm/mmu.h b/arch/arm64/include/asm/mmu.h index c2f006c48bdb..77c3851deae1 100644 --- a/arch/arm64/include/asm/mmu.h +++ b/arch/arm64/include/asm/mmu.h @@ -17,21 +17,22 @@ #define __ASM_MMU_H typedef struct { - unsigned int id; - raw_spinlock_t id_lock; - void *vdso; + atomic64_t id; + void *vdso; } mm_context_t; -#define INIT_MM_CONTEXT(name) \ - .context.id_lock = __RAW_SPIN_LOCK_UNLOCKED(name.context.id_lock), - -#define ASID(mm) ((mm)->context.id & 0xffff) +/* + * This macro is only used by the TLBI code, which cannot race with an + * ASID change and therefore doesn't need to reload the counter using + * atomic64_read. + */ +#define ASID(mm) ((mm)->context.id.counter & 0xffff) extern void paging_init(void); -extern void setup_mm_for_reboot(void); extern void __iomem *early_io_map(phys_addr_t phys, unsigned long virt); extern void init_mem_pgprot(void); -/* create an identity mapping for memory (or io if map_io is true) */ -extern void create_id_mapping(phys_addr_t addr, phys_addr_t size, int map_io); +extern void create_pgd_mapping(struct mm_struct *mm, phys_addr_t phys, + unsigned long virt, phys_addr_t size, + pgprot_t prot); #endif |