| 218,6 → 218,12 |
|---|
| spill_2_normal: |
| SPILL_TO_USPACE_WINDOW_BUFFER |
| |
| /* TT = 0xa0, TL = 0, spill_0_other handler */ |
| .org trap_table + TT_SPILL_0_OTHER*ENTRY_SIZE |
| .global spill_0_other |
| spill_0_other: |
| SPILL_TO_USPACE_WINDOW_BUFFER |
| |
| /* TT = 0xc0, TL = 0, fill_0_normal handler */ |
| .org trap_table + TT_FILL_0_NORMAL*ENTRY_SIZE |
| .global fill_0_normal |
| 547,12 → 553,12 |
|---|
| .endif |
| |
| /* |
| * Mark the CANSAVE windows as OTHER windows. |
| * Mark the CANRESTORE windows as OTHER windows. |
| * Set CLEANWIN to NWINDOW-1 so that clean_window traps do not occur. |
| */ |
| rdpr %cansave, %l0 |
| rdpr %canrestore, %l0 |
| wrpr %l0, %otherwin |
| wrpr %g0, %cansave |
| wrpr %g0, %canrestore |
| wrpr %g0, NWINDOW - 1, %cleanwin |
| |
| /* |
| 641,8 → 647,10 |
|---|
| |
| /* |
| * If OTHERWIN is zero, then all the userspace windows have been |
| * spilled to kernel memory (i.e. register window buffer). If |
| * OTHERWIN is non-zero, then some userspace windows are still |
| * spilled to kernel memory (i.e. register window buffer). Moreover, |
| * if the scheduler was called in the meantime, all valid windows |
| * belonging to other threads were spilled by context_restore(). |
| * If OTHERWIN is non-zero, then some userspace windows are still |
| * valid. Others might have been spilled. However, the CWP pointer |
| * needs no fixing because the scheduler had not been called. |
| */ |
| 659,7 → 667,7 |
|---|
| */ |
| and %g1, TSTATE_CWP_MASK, %l0 |
| inc %l0 |
| and %l0, TSTATE_CWP_MASK, %l0 ! %l0 mod NWINDOW |
| and %l0, NWINDOW - 1, %l0 ! %l0 mod NWINDOW |
| rdpr %cwp, %l1 |
| cmp %l0, %l1 |
| bz 0f ! CWP is ok |
| 667,13 → 675,12 |
|---|
| |
| /* |
| * Fix CWP. |
| * Just for reminder, the input registers in the current window |
| * are the output registers of the window to which we want to |
| * restore. Because the fill trap fills only input and local |
| * In order to recapitulate, the input registers in the current |
| * window are the output registers of the window to which we want |
| * to restore. Because the fill trap fills only input and local |
| * registers of a window, we need to preserve those output |
| * registers manually. |
| */ |
| flushw |
| mov %sp, %g2 |
| stx %i0, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I0] |
| stx %i1, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I1] |
| 738,7 → 745,8 |
|---|
| * Fill all windows stored in the buffer. |
| */ |
| clr %g4 |
| 0: andcc %g7, PAGE_WIDTH - 1, %g0 ! PAGE_SIZE alignment check |
| set PAGE_SIZE - 1, %g5 |
| 0: andcc %g7, %g5, %g0 ! PAGE_SIZE alignment check |
| bz 0f ! %g7 is page-aligned, no more windows to refill |
| nop |
| |