| David S. Miller | 9f82596 | 2012-10-05 13:45:26 -0700 | [diff] [blame] | 1 | /* NG4copy_page.S: Niagara-4 optimized clear page. |
| 2 | * |
| 3 | * Copyright (C) 2012 (davem@davemloft.net) |
| 4 | */ |
| 5 | |
| 6 | #include <asm/asi.h> |
| 7 | #include <asm/page.h> |
| 8 | |
| 9 | .text |
| 10 | |
| 11 | .register %g3, #scratch |
| 12 | |
| 13 | .align 32 |
| 14 | .globl NG4clear_page |
| 15 | .globl NG4clear_user_page |
| 16 | NG4clear_page: /* %o0=dest */ |
| 17 | NG4clear_user_page: /* %o0=dest, %o1=vaddr */ |
| 18 | set PAGE_SIZE, %g7 |
| 19 | mov 0x20, %g3 |
| 20 | 1: stxa %g0, [%o0 + %g0] ASI_ST_BLKINIT_MRU_P |
| 21 | subcc %g7, 0x40, %g7 |
| 22 | stxa %g0, [%o0 + %g3] ASI_ST_BLKINIT_MRU_P |
| 23 | bne,pt %xcc, 1b |
| 24 | add %o0, 0x40, %o0 |
| 25 | membar #StoreLoad|#StoreStore |
| 26 | retl |
| 27 | nop |
| 28 | .size NG4clear_page,.-NG4clear_page |
| 29 | .size NG4clear_user_page,.-NG4clear_user_page |