From 28853ac8fe5221de74a14f1182d7b2b383dfd85c Mon Sep 17 00:00:00 2001 From: Paulius Zaleckas Date: Wed, 25 Mar 2009 13:10:01 +0200 Subject: ARM: Add support for FA526 v2 Adds support for Faraday FA526 core. This core is used at least by: Cortina Systems Gemini and Centroid family Cavium Networks ECONA family Grain Media GM8120 Pixelplus ImageARM Prolific PL-1029 Faraday IP evaluation boards v2: - move TLB_BTB to separate patch - update copyrights Signed-off-by: Paulius Zaleckas --- arch/arm/mm/copypage-fa.c | 86 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 86 insertions(+) create mode 100644 arch/arm/mm/copypage-fa.c (limited to 'arch/arm/mm/copypage-fa.c') diff --git a/arch/arm/mm/copypage-fa.c b/arch/arm/mm/copypage-fa.c new file mode 100644 index 000000000000..b2a6008b0111 --- /dev/null +++ b/arch/arm/mm/copypage-fa.c @@ -0,0 +1,86 @@ +/* + * linux/arch/arm/lib/copypage-fa.S + * + * Copyright (C) 2005 Faraday Corp. + * Copyright (C) 2008-2009 Paulius Zaleckas + * + * Based on copypage-v4wb.S: + * Copyright (C) 1995-1999 Russell King + * + * 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. + */ +#include +#include + +/* + * Faraday optimised copy_user_page + */ +static void __naked +fa_copy_user_page(void *kto, const void *kfrom) +{ + asm("\ + stmfd sp!, {r4, lr} @ 2\n\ + mov r2, %0 @ 1\n\ +1: ldmia r1!, {r3, r4, ip, lr} @ 4\n\ + stmia r0, {r3, r4, ip, lr} @ 4\n\ + mcr p15, 0, r0, c7, c14, 1 @ 1 clean and invalidate D line\n\ + add r0, r0, #16 @ 1\n\ + ldmia r1!, {r3, r4, ip, lr} @ 4\n\ + stmia r0, {r3, r4, ip, lr} @ 4\n\ + mcr p15, 0, r0, c7, c14, 1 @ 1 clean and invalidate D line\n\ + add r0, r0, #16 @ 1\n\ + subs r2, r2, #1 @ 1\n\ + bne 1b @ 1\n\ + mcr p15, 0, r2, c7, c10, 4 @ 1 drain WB\n\ + ldmfd sp!, {r4, pc} @ 3" + : + : "I" (PAGE_SIZE / 32)); +} + +void fa_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); + fa_copy_user_page(kto, kfrom); + kunmap_atomic(kfrom, KM_USER1); + kunmap_atomic(kto, KM_USER0); +} + +/* + * Faraday optimised clear_user_page + * + * Same story as above. + */ +void fa_clear_user_highpage(struct page *page, unsigned long vaddr) +{ + void *ptr, *kaddr = kmap_atomic(page, KM_USER0); + asm volatile("\ + mov r1, %2 @ 1\n\ + mov r2, #0 @ 1\n\ + mov r3, #0 @ 1\n\ + mov ip, #0 @ 1\n\ + mov lr, #0 @ 1\n\ +1: stmia %0, {r2, r3, ip, lr} @ 4\n\ + mcr p15, 0, %0, c7, c14, 1 @ 1 clean and invalidate D line\n\ + add %0, %0, #16 @ 1\n\ + stmia %0, {r2, r3, ip, lr} @ 4\n\ + mcr p15, 0, %0, c7, c14, 1 @ 1 clean and invalidate D line\n\ + add %0, %0, #16 @ 1\n\ + subs r1, r1, #1 @ 1\n\ + bne 1b @ 1\n\ + mcr p15, 0, r1, c7, c10, 4 @ 1 drain WB" + : "=r" (ptr) + : "0" (kaddr), "I" (PAGE_SIZE / 32) + : "r1", "r2", "r3", "ip", "lr"); + kunmap_atomic(kaddr, KM_USER0); +} + +struct cpu_user_fns fa_user_fns __initdata = { + .cpu_clear_user_highpage = fa_clear_user_highpage, + .cpu_copy_user_highpage = fa_copy_user_highpage, +}; -- cgit v1.2.3