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author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-12-30 17:36:49 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-12-30 17:36:49 -0800 |
commit | 14a3c4ab0e58d143c7928c9eb2f2610205e13bf2 (patch) | |
tree | 885992999d7a1a2fd3586efcf32ebcbcbc3a72aa /arch/arm/mm/copypage-feroceon.c | |
parent | 1af237a099a3b8ff56aa384f605c6a68af7bf288 (diff) | |
parent | 47992cbdaef2f18a47871b2ed01ad27f568c8b73 (diff) | |
download | kernel_samsung_smdk4412-14a3c4ab0e58d143c7928c9eb2f2610205e13bf2.zip kernel_samsung_smdk4412-14a3c4ab0e58d143c7928c9eb2f2610205e13bf2.tar.gz kernel_samsung_smdk4412-14a3c4ab0e58d143c7928c9eb2f2610205e13bf2.tar.bz2 |
Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm: (407 commits)
[ARM] pxafb: add support for overlay1 and overlay2 as framebuffer devices
[ARM] pxafb: cleanup of the timing checking code
[ARM] pxafb: cleanup of the color format manipulation code
[ARM] pxafb: add palette format support for LCCR4_PAL_FOR_3
[ARM] pxafb: add support for FBIOPAN_DISPLAY by dma braching
[ARM] pxafb: allow pxafb_set_par() to start from arbitrary yoffset
[ARM] pxafb: allow video memory size to be configurable
[ARM] pxa: add document on the MFP design and how to use it
[ARM] sa1100_wdt: don't assume CLOCK_TICK_RATE to be a constant
[ARM] rtc-sa1100: don't assume CLOCK_TICK_RATE to be a constant
[ARM] pxa/tavorevb: update board support (smartpanel LCD + keypad)
[ARM] pxa: Update eseries defconfig
[ARM] 5352/1: add w90p910-plat config file
[ARM] s3c: S3C options should depend on PLAT_S3C
[ARM] mv78xx0: implement GPIO and GPIO interrupt support
[ARM] Kirkwood: implement GPIO and GPIO interrupt support
[ARM] Orion: share GPIO IRQ handling code
[ARM] Orion: share GPIO handling code
[ARM] s3c: define __io using the typesafe version
[ARM] S3C64XX: Ensure CPU_V6 is selected
...
Diffstat (limited to 'arch/arm/mm/copypage-feroceon.c')
-rw-r--r-- | arch/arm/mm/copypage-feroceon.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/arch/arm/mm/copypage-feroceon.c b/arch/arm/mm/copypage-feroceon.c new file mode 100644 index 0000000..c3ba6a9 --- /dev/null +++ b/arch/arm/mm/copypage-feroceon.c @@ -0,0 +1,111 @@ +/* + * 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_highpage and clear_user_page on Feroceon + * more optimally than the generic implementations. + */ +#include <linux/init.h> +#include <linux/highmem.h> + +static void __attribute__((naked)) +feroceon_copy_user_page(void *kto, const void *kfrom) +{ + 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 feroceon_copy_user_highpage(struct page *to, struct page *from, + unsigned long vaddr) +{ + void *kto, *kfrom; + + kto = kmap_atomic(to, KM_USER0); + kfrom = kmap_atomic(from, KM_USER1); + feroceon_copy_user_page(kto, kfrom); + kunmap_atomic(kfrom, KM_USER1); + kunmap_atomic(kto, KM_USER0); +} + +void feroceon_clear_user_highpage(struct page *page, unsigned long vaddr) +{ + void *ptr, *kaddr = kmap_atomic(page, KM_USER0); + asm volatile ("\ + mov r1, %2 \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 %0, {r2-r7, ip, lr} \n\ + subs r1, r1, #1 \n\ + mcr p15, 0, %0, c7, c14, 1 @ clean and invalidate D line\n\ + add %0, %0, #32 \n\ + bne 1b \n\ + mcr p15, 0, r1, c7, c10, 4 @ drain WB" + : "=r" (ptr) + : "0" (kaddr), "I" (PAGE_SIZE / 32) + : "r1", "r2", "r3", "r4", "r5", "r6", "r7", "ip", "lr"); + kunmap_atomic(kaddr, KM_USER0); +} + +struct cpu_user_fns feroceon_user_fns __initdata = { + .cpu_clear_user_highpage = feroceon_clear_user_highpage, + .cpu_copy_user_highpage = feroceon_copy_user_highpage, +}; + |