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| author | Vineet Gupta <vgupta@synopsys.com> | 2013-01-18 15:12:19 +0530 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2013-02-15 23:15:51 +0530 |
| commit | f1f3347da9440eedd2350f4f5d13d8860f570b92 (patch) | |
| tree | 47d652aeaf9c4455d085578c976c73789620ba8c /arch/arc/include/asm/mmu.h | |
| parent | 5dda4dc570ac41e3bd73ef871c500aeb7005c6b0 (diff) | |
| download | linux-f1f3347da9440eedd2350f4f5d13d8860f570b92.tar.bz2 | |
ARC: MMU Context Management
ARC700 MMU provides for tagging TLB entries with a 8-bit ASID to avoid
having to flush the TLB every task switch.
It also allows for a quick way to invalidate all the TLB entries for
task useful for:
* COW sementics during fork()
* task exit()ing
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/include/asm/mmu.h')
| -rw-r--r-- | arch/arc/include/asm/mmu.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/arc/include/asm/mmu.h b/arch/arc/include/asm/mmu.h new file mode 100644 index 000000000000..56b02320f1a9 --- /dev/null +++ b/arch/arc/include/asm/mmu.h @@ -0,0 +1,23 @@ +/* + * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) + * + * 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. + */ + +#ifndef _ASM_ARC_MMU_H +#define _ASM_ARC_MMU_H + +#ifndef __ASSEMBLY__ + +typedef struct { + unsigned long asid; /* Pvt Addr-Space ID for mm */ +#ifdef CONFIG_ARC_TLB_DBG + struct task_struct *tsk; +#endif +} mm_context_t; + +#endif + +#endif |