diff options
| author |   Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
|---|---|---|
| committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
| commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
| tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/arm/mm/tlb-v4.S | |
| parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) | |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/arm/mm/tlb-v4.S')
| -rw-r--r-- | kernel/arch/arm/mm/tlb-v4.S | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/kernel/arch/arm/mm/tlb-v4.S b/kernel/arch/arm/mm/tlb-v4.S new file mode 100644 index 000000000..a2b5dca42 --- /dev/null +++ b/kernel/arch/arm/mm/tlb-v4.S @@ -0,0 +1,62 @@ +/* + * linux/arch/arm/mm/tlbv4.S + * + * Copyright (C) 1997-2002 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. + * + * ARM architecture version 4 TLB handling functions. + * These assume a split I/D TLBs, and no write buffer. + * + * Processors: ARM720T + */ +#include <linux/linkage.h> +#include <linux/init.h> +#include <asm/assembler.h> +#include <asm/asm-offsets.h> +#include <asm/tlbflush.h> +#include "proc-macros.S" + + .align 5 +/* + * v4_flush_user_tlb_range(start, end, mm) + * + * Invalidate a range of TLB entries in the specified user address space. + * + * - start - range start address + * - end - range end address + * - mm - mm_struct describing address space + */ + .align 5 +ENTRY(v4_flush_user_tlb_range) + vma_vm_mm ip, r2 + act_mm r3 @ get current->active_mm + eors r3, ip, r3 @ == mm ? + retne lr @ no, we dont do anything +.v4_flush_kern_tlb_range: + bic r0, r0, #0x0ff + bic r0, r0, #0xf00 +1: mcr p15, 0, r0, c8, c7, 1 @ invalidate TLB entry + add r0, r0, #PAGE_SZ + cmp r0, r1 + blo 1b + ret lr + +/* + * v4_flush_kern_tlb_range(start, end) + * + * Invalidate a range of TLB entries in the specified kernel + * address range. + * + * - start - virtual address (may not be aligned) + * - end - virtual address (may not be aligned) + */ +.globl v4_flush_kern_tlb_range +.equ v4_flush_kern_tlb_range, .v4_flush_kern_tlb_range + + __INITDATA + + /* define struct cpu_tlb_fns (see <asm/tlbflush.h> and proc-macros.S) */ + define_tlb_functions v4, v4_tlb_flags |