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| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2008-10-31 13:08:02 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-11-27 23:53:46 +0000 |
| commit | d73e60b7144a86baf0fdfcc9537a70bb4f72e11c (patch) | |
| tree | 02155154caf6f1a5d6ce38f2a89ed67f875c7791 /arch/arm/mm/copypage-feroceon.c | |
| parent | 487ff32082a9bd7489d8185cf7d7a2fdf18a22fa (diff) | |
[ARM] copypage: convert assembly files to C
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm/copypage-feroceon.c')
| -rw-r--r-- | arch/arm/mm/copypage-feroceon.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/arch/arm/mm/copypage-feroceon.c b/arch/arm/mm/copypage-feroceon.c new file mode 100644 index 000000000000..c8347670ab00 --- /dev/null +++ b/arch/arm/mm/copypage-feroceon.c @@ -0,0 +1,100 @@ +/* + * linux/arch/arm/mm/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/init.h> + +#include <asm/page.h> + +void __attribute__((naked)) +feroceon_copy_user_page(void *kto, const void *kfrom, unsigned long vaddr) +{ + asm("\ + stmfd sp!, {r4-r9, lr} \n\ + mov ip, %0 \n\ +1: mov lr, r1 \n\ + ldmia r1!, {r2 - r9} \n\ + pld [lr, #32] \n\ + pld [lr, #64] \n\ + pld [lr, #96] \n\ + pld [lr, #128] \n\ + pld [lr, #160] \n\ + pld [lr, #192] \n\ + pld [lr, #224] \n\ + stmia r0, {r2 - r9} \n\ + ldmia r1!, {r2 - r9} \n\ + mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\ + add r0, r0, #32 \n\ + stmia r0, {r2 - r9} \n\ + ldmia r1!, {r2 - r9} \n\ + mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\ + add r0, r0, #32 \n\ + stmia r0, {r2 - r9} \n\ + ldmia r1!, {r2 - r9} \n\ + mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\ + add r0, r0, #32 \n\ + stmia r0, {r2 - r9} \n\ + ldmia r1!, {r2 - r9} \n\ + mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\ + add r0, r0, #32 \n\ + stmia r0, {r2 - r9} \n\ + ldmia r1!, {r2 - r9} \n\ + mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\ + add r0, r0, #32 \n\ + stmia r0, {r2 - r9} \n\ + ldmia r1!, {r2 - r9} \n\ + mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\ + add r0, r0, #32 \n\ + stmia r0, {r2 - r9} \n\ + ldmia r1!, {r2 - r9} \n\ + mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\ + add r0, r0, #32 \n\ + stmia r0, {r2 - r9} \n\ + subs ip, ip, #(32 * 8) \n\ + mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\ + add r0, r0, #32 \n\ + bne 1b \n\ + mcr p15, 0, ip, c7, c10, 4 @ drain WB\n\ + ldmfd sp!, {r4-r9, pc}" + : + : "I" (PAGE_SIZE)); +} + +void __attribute__((naked)) +feroceon_clear_user_page(void *kaddr, unsigned long vaddr) +{ + asm("\ + stmfd sp!, {r4-r7, lr} \n\ + mov r1, %0 \n\ + mov r2, #0 \n\ + mov r3, #0 \n\ + mov r4, #0 \n\ + mov r5, #0 \n\ + mov r6, #0 \n\ + mov r7, #0 \n\ + mov ip, #0 \n\ + mov lr, #0 \n\ +1: stmia r0, {r2-r7, ip, lr} \n\ + subs r1, r1, #1 \n\ + mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\ + add r0, r0, #32 \n\ + bne 1b \n\ + mcr p15, 0, r1, c7, c10, 4 @ drain WB\n\ + ldmfd sp!, {r4-r7, pc}" + : + : "I" (PAGE_SIZE / 32)); +} + +struct cpu_user_fns feroceon_user_fns __initdata = { + .cpu_clear_user_page = feroceon_clear_user_page, + .cpu_copy_user_page = feroceon_copy_user_page, +}; + |