mirror of
https://github.com/torvalds/linux.git
synced 2024-12-27 05:11:48 +00:00
95d6976d20
* ARC700 has VIPT L1 Caches * Caches don't snoop and are not coherent * Given the PAGE_SIZE and Cache associativity, we don't support aliasing D$ configurations (yet), but do allow aliasing I$ configs Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
68 lines
2.3 KiB
C
68 lines
2.3 KiB
C
/*
|
|
* 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.
|
|
*
|
|
* vineetg: May 2011: for Non-aliasing VIPT D-cache following can be NOPs
|
|
* -flush_cache_dup_mm (fork)
|
|
* -likewise for flush_cache_mm (exit/execve)
|
|
* -likewise for flush_cache_{range,page} (munmap, exit, COW-break)
|
|
*
|
|
* vineetg: April 2008
|
|
* -Added a critical CacheLine flush to copy_to_user_page( ) which
|
|
* was causing gdbserver to not setup breakpoints consistently
|
|
*/
|
|
|
|
#ifndef _ASM_CACHEFLUSH_H
|
|
#define _ASM_CACHEFLUSH_H
|
|
|
|
#include <linux/mm.h>
|
|
|
|
void flush_cache_all(void);
|
|
|
|
void flush_icache_range(unsigned long start, unsigned long end);
|
|
void flush_icache_page(struct vm_area_struct *vma, struct page *page);
|
|
void flush_icache_range_vaddr(unsigned long paddr, unsigned long u_vaddr,
|
|
int len);
|
|
|
|
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
|
|
|
|
void flush_dcache_page(struct page *page);
|
|
|
|
void dma_cache_wback_inv(unsigned long start, unsigned long sz);
|
|
void dma_cache_inv(unsigned long start, unsigned long sz);
|
|
void dma_cache_wback(unsigned long start, unsigned long sz);
|
|
|
|
#define flush_dcache_mmap_lock(mapping) do { } while (0)
|
|
#define flush_dcache_mmap_unlock(mapping) do { } while (0)
|
|
|
|
/* TBD: optimize this */
|
|
#define flush_cache_vmap(start, end) flush_cache_all()
|
|
#define flush_cache_vunmap(start, end) flush_cache_all()
|
|
|
|
/*
|
|
* VM callbacks when entire/range of user-space V-P mappings are
|
|
* torn-down/get-invalidated
|
|
*
|
|
* Currently we don't support D$ aliasing configs for our VIPT caches
|
|
* NOPS for VIPT Cache with non-aliasing D$ configurations only
|
|
*/
|
|
#define flush_cache_dup_mm(mm) /* called on fork */
|
|
#define flush_cache_mm(mm) /* called on munmap/exit */
|
|
#define flush_cache_range(mm, u_vstart, u_vend)
|
|
#define flush_cache_page(vma, u_vaddr, pfn) /* PF handling/COW-break */
|
|
|
|
#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
|
|
do { \
|
|
memcpy(dst, src, len); \
|
|
if (vma->vm_flags & VM_EXEC) \
|
|
flush_icache_range_vaddr((unsigned long)(dst), vaddr, len);\
|
|
} while (0)
|
|
|
|
#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
|
|
memcpy(dst, src, len); \
|
|
|
|
#endif
|