9eeee24414
Remove an arch-dependent hunk in favor of #define-ing the respective bits in asm-<arch>/agp.h (allowing easier overriding in para-virtualized environments). Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Dave Jones <davej@redhat.com>
35 lines
1.2 KiB
C
35 lines
1.2 KiB
C
#ifndef AGP_H
|
|
#define AGP_H 1
|
|
|
|
#include <asm/cacheflush.h>
|
|
|
|
/*
|
|
* Functions to keep the agpgart mappings coherent.
|
|
* The GART gives the CPU a physical alias of memory. The alias is
|
|
* mapped uncacheable. Make sure there are no conflicting mappings
|
|
* with different cachability attributes for the same page.
|
|
*/
|
|
|
|
/* Caller's responsibility to call global_flush_tlb() for
|
|
* performance reasons */
|
|
#define map_page_into_agp(page) change_page_attr(page, 1, PAGE_KERNEL_NOCACHE)
|
|
#define unmap_page_from_agp(page) change_page_attr(page, 1, PAGE_KERNEL)
|
|
#define flush_agp_mappings() global_flush_tlb()
|
|
|
|
/* Could use CLFLUSH here if the cpu supports it. But then it would
|
|
need to be called for each cacheline of the whole page so it may not be
|
|
worth it. Would need a page for it. */
|
|
#define flush_agp_cache() asm volatile("wbinvd":::"memory")
|
|
|
|
/* Convert a physical address to an address suitable for the GART. */
|
|
#define phys_to_gart(x) (x)
|
|
#define gart_to_phys(x) (x)
|
|
|
|
/* GATT allocation. Returns/accepts GATT kernel virtual address. */
|
|
#define alloc_gatt_pages(order) \
|
|
((char *)__get_free_pages(GFP_KERNEL, (order)))
|
|
#define free_gatt_pages(table, order) \
|
|
free_pages((unsigned long)(table), (order))
|
|
|
|
#endif
|