| Lennert Buytenhek | 0ed1507 | 2008-04-24 01:31:45 -0400 | [diff] [blame^] | 1 | /* |
| 2 | * linux/arch/arm/lib/copypage-feroceon.S |
| 3 | * |
| 4 | * Copyright (C) 2008 Marvell Semiconductors |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | * |
| 10 | * This handles copy_user_page and clear_user_page on Feroceon |
| 11 | * more optimally than the generic implementations. |
| 12 | */ |
| 13 | #include <linux/linkage.h> |
| 14 | #include <linux/init.h> |
| 15 | #include <asm/asm-offsets.h> |
| 16 | |
| 17 | .text |
| 18 | .align 5 |
| 19 | |
| 20 | ENTRY(feroceon_copy_user_page) |
| 21 | stmfd sp!, {r4-r9, lr} |
| 22 | mov ip, #PAGE_SZ |
| 23 | 1: mov lr, r1 |
| 24 | ldmia r1!, {r2 - r9} |
| 25 | pld [lr, #32] |
| 26 | pld [lr, #64] |
| 27 | pld [lr, #96] |
| 28 | pld [lr, #128] |
| 29 | pld [lr, #160] |
| 30 | pld [lr, #192] |
| 31 | pld [lr, #224] |
| 32 | stmia r0, {r2 - r9} |
| 33 | ldmia r1!, {r2 - r9} |
| 34 | mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line |
| 35 | add r0, r0, #32 |
| 36 | stmia r0, {r2 - r9} |
| 37 | ldmia r1!, {r2 - r9} |
| 38 | mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line |
| 39 | add r0, r0, #32 |
| 40 | stmia r0, {r2 - r9} |
| 41 | ldmia r1!, {r2 - r9} |
| 42 | mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line |
| 43 | add r0, r0, #32 |
| 44 | stmia r0, {r2 - r9} |
| 45 | ldmia r1!, {r2 - r9} |
| 46 | mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line |
| 47 | add r0, r0, #32 |
| 48 | stmia r0, {r2 - r9} |
| 49 | ldmia r1!, {r2 - r9} |
| 50 | mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line |
| 51 | add r0, r0, #32 |
| 52 | stmia r0, {r2 - r9} |
| 53 | ldmia r1!, {r2 - r9} |
| 54 | mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line |
| 55 | add r0, r0, #32 |
| 56 | stmia r0, {r2 - r9} |
| 57 | ldmia r1!, {r2 - r9} |
| 58 | mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line |
| 59 | add r0, r0, #32 |
| 60 | stmia r0, {r2 - r9} |
| 61 | subs ip, ip, #(32 * 8) |
| 62 | mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line |
| 63 | add r0, r0, #32 |
| 64 | bne 1b |
| 65 | mcr p15, 0, ip, c7, c10, 4 @ drain WB |
| 66 | ldmfd sp!, {r4-r9, pc} |
| 67 | |
| 68 | .align 5 |
| 69 | |
| 70 | ENTRY(feroceon_clear_user_page) |
| 71 | stmfd sp!, {r4-r7, lr} |
| 72 | mov r1, #PAGE_SZ/32 |
| 73 | mov r2, #0 |
| 74 | mov r3, #0 |
| 75 | mov r4, #0 |
| 76 | mov r5, #0 |
| 77 | mov r6, #0 |
| 78 | mov r7, #0 |
| 79 | mov ip, #0 |
| 80 | mov lr, #0 |
| 81 | 1: stmia r0, {r2-r7, ip, lr} |
| 82 | subs r1, r1, #1 |
| 83 | mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line |
| 84 | add r0, r0, #32 |
| 85 | bne 1b |
| 86 | mcr p15, 0, r1, c7, c10, 4 @ drain WB |
| 87 | ldmfd sp!, {r4-r7, pc} |
| 88 | |
| 89 | __INITDATA |
| 90 | |
| 91 | .type feroceon_user_fns, #object |
| 92 | ENTRY(feroceon_user_fns) |
| 93 | .long feroceon_clear_user_page |
| 94 | .long feroceon_copy_user_page |
| 95 | .size feroceon_user_fns, . - feroceon_user_fns |