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authorRussell King <rmk+kernel@arm.linux.org.uk>2012-05-04 12:04:26 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2012-05-05 05:50:50 +0100
commit357c9c1f07d4546bc3fbc0fd1044d96b114d14ed (patch)
treea355e9cd73ab9f7b536b4c7562d931cfb3f5a885 /arch/arm/mm/copypage-v3.c
parent69964ea4c7b68c9399f7977aa5b9aa6539a6a98a (diff)
downloadlinux-linaro-stable-357c9c1f07d4546bc3fbc0fd1044d96b114d14ed.tar.gz
ARM: Remove support for ARMv3 ARM610 and ARM710 CPUs
This patch removes support for ARMv3 CPUs, which haven't worked properly for quite some time (see the FIXME comment in arch/arm/mm/fault.c). The only V3 parts left is the cache model for ARMv3, which is needed for some odd reason by ARM740T CPUs, and being able to build with -march=armv3, which is required for the RiscPC platform due to its bus structure. Acked-by: Will Deacon <will.deacon@arm.com> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm/copypage-v3.c')
-rw-r--r--arch/arm/mm/copypage-v3.c81
1 files changed, 0 insertions, 81 deletions
diff --git a/arch/arm/mm/copypage-v3.c b/arch/arm/mm/copypage-v3.c
deleted file mode 100644
index 3935bddd4769..000000000000
--- a/arch/arm/mm/copypage-v3.c
+++ /dev/null
@@ -1,81 +0,0 @@
-/*
- * linux/arch/arm/mm/copypage-v3.c
- *
- * 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 <linux/init.h>
-#include <linux/highmem.h>
-
-/*
- * ARMv3 optimised copy_user_highpage
- *
- * FIXME: do we need to handle cache stuff...
- */
-static void __naked
-v3_copy_user_page(void *kto, const void *kfrom)
-{
- asm("\n\
- stmfd sp!, {r4, lr} @ 2\n\
- mov r2, %2 @ 1\n\
- ldmia %0!, {r3, r4, ip, lr} @ 4+1\n\
-1: stmia %1!, {r3, r4, ip, lr} @ 4\n\
- ldmia %0!, {r3, r4, ip, lr} @ 4+1\n\
- stmia %1!, {r3, r4, ip, lr} @ 4\n\
- ldmia %0!, {r3, r4, ip, lr} @ 4+1\n\
- stmia %1!, {r3, r4, ip, lr} @ 4\n\
- ldmia %0!, {r3, r4, ip, lr} @ 4\n\
- subs r2, r2, #1 @ 1\n\
- stmia %1!, {r3, r4, ip, lr} @ 4\n\
- ldmneia %0!, {r3, r4, ip, lr} @ 4\n\
- bne 1b @ 1\n\
- ldmfd sp!, {r4, pc} @ 3"
- :
- : "r" (kfrom), "r" (kto), "I" (PAGE_SIZE / 64));
-}
-
-void v3_copy_user_highpage(struct page *to, struct page *from,
- unsigned long vaddr, struct vm_area_struct *vma)
-{
- void *kto, *kfrom;
-
- kto = kmap_atomic(to);
- kfrom = kmap_atomic(from);
- v3_copy_user_page(kto, kfrom);
- kunmap_atomic(kfrom);
- kunmap_atomic(kto);
-}
-
-/*
- * ARMv3 optimised clear_user_page
- *
- * FIXME: do we need to handle cache stuff...
- */
-void v3_clear_user_highpage(struct page *page, unsigned long vaddr)
-{
- void *ptr, *kaddr = kmap_atomic(page);
- asm volatile("\n\
- 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\
- stmia %0!, {r2, r3, ip, lr} @ 4\n\
- stmia %0!, {r2, r3, ip, lr} @ 4\n\
- stmia %0!, {r2, r3, ip, lr} @ 4\n\
- subs r1, r1, #1 @ 1\n\
- bne 1b @ 1"
- : "=r" (ptr)
- : "0" (kaddr), "I" (PAGE_SIZE / 64)
- : "r1", "r2", "r3", "ip", "lr");
- kunmap_atomic(kaddr);
-}
-
-struct cpu_user_fns v3_user_fns __initdata = {
- .cpu_clear_user_highpage = v3_clear_user_highpage,
- .cpu_copy_user_highpage = v3_copy_user_highpage,
-};