diff options
| -rw-r--r-- | sys/arch/amd64/amd64/pmap.c | 11 | ||||
| -rw-r--r-- | sys/include/vm/pmap.h | 6 |
2 files changed, 17 insertions, 0 deletions
diff --git a/sys/arch/amd64/amd64/pmap.c b/sys/arch/amd64/amd64/pmap.c index 5fe1e3b..e898e74 100644 --- a/sys/arch/amd64/amd64/pmap.c +++ b/sys/arch/amd64/amd64/pmap.c @@ -215,6 +215,17 @@ pmap_create_vas(struct vm_ctx *ctx) return new_vas; } +void +pmap_switch_vas(struct vm_ctx *ctx, struct vas vas) +{ + uintptr_t cr3_val = vas.cr3_flags | vas.top_level; + + __ASMV("mov %0, %%cr3" + : + : "r" (cr3_val) + : "memory"); +} + struct vas pmap_read_vas(void) { diff --git a/sys/include/vm/pmap.h b/sys/include/vm/pmap.h index c591605..516c2ea 100644 --- a/sys/include/vm/pmap.h +++ b/sys/include/vm/pmap.h @@ -72,6 +72,12 @@ struct vm_ctx { struct vas pmap_create_vas(struct vm_ctx *); /* + * Switch the current virtual address space + * to another. + */ +void pmap_switch_vas(struct vm_ctx *, struct vas); + +/* * Read virtual address space descriptor * and return it. */ |