1 #ifndef _ASM_IA64_AGP_H
2 #define _ASM_IA64_AGP_H
5 * IA-64 specific AGP definitions.
7 * Copyright (C) 2002-2003 Hewlett-Packard Co
8 * David Mosberger-Tang <davidm@hpl.hp.com>
12 * To avoid memory-attribute aliasing issues, we require that the AGPGART engine operate
13 * in coherent mode, which lets us map the AGP memory as normal (write-back) memory
14 * (unlike x86, where it gets mapped "write-coalescing").
16 #define map_page_into_agp(page) /* nothing */
17 #define unmap_page_from_agp(page) /* nothing */
18 #define flush_agp_mappings() /* nothing */
19 #define flush_agp_cache() mb()
21 /* Convert a physical address to an address suitable for the GART. */
23 #define phys_to_gart(x) (x)
24 #define gart_to_phys(x) (x)
26 #define phys_to_gart(x) phys_to_machine_for_dma(x)
27 #define gart_to_phys(x) machine_to_phys_for_dma(x)
30 /* GATT allocation. Returns/accepts GATT kernel virtual address. */
32 #include <asm/hypervisor.h>
34 alloc_gatt_pages(unsigned int order)
37 unsigned long ret = __get_free_pages(GFP_KERNEL, (order));
41 error = xen_create_contiguous_region(ret, order, 0);
43 free_pages(ret, order);
50 free_gatt_pages(void* table, unsigned int order)
52 xen_destroy_contiguous_region((unsigned long)table, order);
53 free_pages((unsigned long)table, order);
55 #else /* CONFIG_XEN */
56 /* Convert a physical address to an address suitable for the GART. */
57 #define phys_to_gart(x) (x)
58 #define gart_to_phys(x) (x)
60 /* GATT allocation. Returns/accepts GATT kernel virtual address. */
61 #define alloc_gatt_pages(order) \
62 ((char *)__get_free_pages(GFP_KERNEL, (order)))
63 #define free_gatt_pages(table, order) \
64 free_pages((unsigned long)(table), (order))
65 #endif /* CONFIG_XEN */
67 #endif /* _ASM_IA64_AGP_H */