diff options
Diffstat (limited to 'arch/arm/mm/copypage-feroceon.S')
| -rw-r--r-- | arch/arm/mm/copypage-feroceon.S | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/arch/arm/mm/copypage-feroceon.S b/arch/arm/mm/copypage-feroceon.S new file mode 100644 index 000000000000..7eb0d320d240 --- /dev/null +++ b/arch/arm/mm/copypage-feroceon.S @@ -0,0 +1,95 @@ +/* + * linux/arch/arm/lib/copypage-feroceon.S + * + * Copyright (C) 2008 Marvell Semiconductors + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This handles copy_user_page and clear_user_page on Feroceon + * more optimally than the generic implementations. + */ +#include <linux/linkage.h> +#include <linux/init.h> +#include <asm/asm-offsets.h> + + .text + .align 5 + +ENTRY(feroceon_copy_user_page) + stmfd sp!, {r4-r9, lr} + mov ip, #PAGE_SZ +1: mov lr, r1 + ldmia r1!, {r2 - r9} + pld [lr, #32] + pld [lr, #64] + pld [lr, #96] + pld [lr, #128] + pld [lr, #160] + pld [lr, #192] + pld [lr, #224] + stmia r0, {r2 - r9} + ldmia r1!, {r2 - r9} + mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line + add r0, r0, #32 + stmia r0, {r2 - r9} + ldmia r1!, {r2 - r9} + mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line + add r0, r0, #32 + stmia r0, {r2 - r9} + ldmia r1!, {r2 - r9} + mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line + add r0, r0, #32 + stmia r0, {r2 - r9} + ldmia r1!, {r2 - r9} + mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line + add r0, r0, #32 + stmia r0, {r2 - r9} + ldmia r1!, {r2 - r9} + mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line + add r0, r0, #32 + stmia r0, {r2 - r9} + ldmia r1!, {r2 - r9} + mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line + add r0, r0, #32 + stmia r0, {r2 - r9} + ldmia r1!, {r2 - r9} + mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line + add r0, r0, #32 + stmia r0, {r2 - r9} + subs ip, ip, #(32 * 8) + mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line + add r0, r0, #32 + bne 1b + mcr p15, 0, ip, c7, c10, 4 @ drain WB + ldmfd sp!, {r4-r9, pc} + + .align 5 + +ENTRY(feroceon_clear_user_page) + stmfd sp!, {r4-r7, lr} + mov r1, #PAGE_SZ/32 + mov r2, #0 + mov r3, #0 + mov r4, #0 + mov r5, #0 + mov r6, #0 + mov r7, #0 + mov ip, #0 + mov lr, #0 +1: stmia r0, {r2-r7, ip, lr} + subs r1, r1, #1 + mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line + add r0, r0, #32 + bne 1b + mcr p15, 0, r1, c7, c10, 4 @ drain WB + ldmfd sp!, {r4-r7, pc} + + __INITDATA + + .type feroceon_user_fns, #object +ENTRY(feroceon_user_fns) + .long feroceon_clear_user_page + .long feroceon_copy_user_page + .size feroceon_user_fns, . - feroceon_user_fns |