| 36,6 → 36,8 |
|---|
| #include <proc/thread.h> |
| #include <arch.h> |
| #include <arch/asm.h> |
| #include <arch/regdef.h> |
| #include <arch/stack.h> |
| #include <arch/mm/tlb.h> |
| #include <arch/mm/page.h> |
| #include <config.h> |
| 51,6 → 53,8 |
|---|
| * |
| * Ensure that thread's kernel stack, as well as userspace window |
| * buffer for userspace threads, are locked in DTLB. |
| * For userspace threads, initialize reserved global registers |
| * in the alternate and interrupt sets. |
| */ |
| void before_thread_runs_arch(void) |
| { |
| 82,6 → 86,14 |
|---|
| dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_NUCLEUS, (uintptr_t) uw_buf); |
| dtlb_insert_mapping(uw_buf, KA2PA(uw_buf), PAGESIZE_8K, true, true); |
| } |
| |
| /* |
| * Write kernel stack address to %g6 and a pointer to the last item |
| * in the userspace window buffer to %g7 in the alternate and interrupt sets. |
| */ |
| write_to_ig_g6((uintptr_t) THREAD->kstack + STACK_SIZE - STACK_BIAS); |
| write_to_ag_g6((uintptr_t) THREAD->kstack + STACK_SIZE - STACK_BIAS); |
| write_to_ag_g7((uintptr_t) THREAD->arch.uspace_window_buffer); |
| } |
| } |
| |
| 123,6 → 135,9 |
|---|
| */ |
| dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_NUCLEUS, (uintptr_t) uw_buf); |
| } |
| |
| /* sample the state of the userspace window buffer */ |
| THREAD->arch.uspace_window_buffer = (uint8_t *) read_from_ag_g7(); |
| } |
| } |
| |