linux/arch/ia64/include/asm/cacheflush.h
Fenghua Yu 62fdd7678a [IA64] Add Variable Page Size and IA64 Support in Intel IOMMU
The patch contains Intel IOMMU IA64 specific code. It defines new
machvec dig_vtd, hooks for IOMMU, DMAR table detection, cache line flush
function, etc.

For a generic kernel with CONFIG_DMAR=y, if Intel IOMMU is detected,
dig_vtd is used for machinve vector. Otherwise, kernel falls back to
dig machine vector. Kernel parameter "machvec=dig" or "intel_iommu=off"
can be used to force kernel to boot dig machine vector.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-10-17 12:14:13 -07:00

54 lines
1.6 KiB
C

#ifndef _ASM_IA64_CACHEFLUSH_H
#define _ASM_IA64_CACHEFLUSH_H
/*
* Copyright (C) 2002 Hewlett-Packard Co
* David Mosberger-Tang <davidm@hpl.hp.com>
*/
#include <linux/page-flags.h>
#include <linux/bitops.h>
#include <asm/page.h>
/*
* Cache flushing routines. This is the kind of stuff that can be very expensive, so try
* to avoid them whenever possible.
*/
#define flush_cache_all() do { } while (0)
#define flush_cache_mm(mm) do { } while (0)
#define flush_cache_dup_mm(mm) do { } while (0)
#define flush_cache_range(vma, start, end) do { } while (0)
#define flush_cache_page(vma, vmaddr, pfn) do { } while (0)
#define flush_icache_page(vma,page) do { } while (0)
#define flush_cache_vmap(start, end) do { } while (0)
#define flush_cache_vunmap(start, end) do { } while (0)
#define flush_dcache_page(page) \
do { \
clear_bit(PG_arch_1, &(page)->flags); \
} while (0)
#define flush_dcache_mmap_lock(mapping) do { } while (0)
#define flush_dcache_mmap_unlock(mapping) do { } while (0)
extern void flush_icache_range (unsigned long start, unsigned long end);
extern void clflush_cache_range(void *addr, int size);
#define flush_icache_user_range(vma, page, user_addr, len) \
do { \
unsigned long _addr = (unsigned long) page_address(page) + ((user_addr) & ~PAGE_MASK); \
flush_icache_range(_addr, _addr + (len)); \
} while (0)
#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
do { memcpy(dst, src, len); \
flush_icache_user_range(vma, page, vaddr, len); \
} while (0)
#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
memcpy(dst, src, len)
#endif /* _ASM_IA64_CACHEFLUSH_H */