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#ifndef _ASM_IA64_AGP_H
#define _ASM_IA64_AGP_H
/*
* IA-64 specific AGP definitions.
*
* Copyright (C) 2002-2003 Hewlett-Packard Co
* David Mosberger-Tang <davidm@hpl.hp.com>
*/
/*
* To avoid memory-attribute aliasing issues, we require that the AGPGART engine operate
* in coherent mode, which lets us map the AGP memory as normal (write-back) memory
* (unlike x86, where it gets mapped "write-coalescing").
*/
#define map_page_into_agp(page) /* nothing */
#define unmap_page_from_agp(page) /* nothing */
#define flush_agp_mappings() /* nothing */
#define flush_agp_cache() mb()
/* Convert a physical address to an address suitable for the GART. */
#ifndef CONFIG_XEN
#define phys_to_gart(x) (x)
#define gart_to_phys(x) (x)
#else
#define phys_to_gart(x) phys_to_machine_for_dma(x)
#define gart_to_phys(x) machine_to_phys_for_dma(x)
#endif
/* GATT allocation. Returns/accepts GATT kernel virtual address. */
#ifndef CONFIG_XEN
#define alloc_gatt_pages(order) \
((char *)__get_free_pages(GFP_KERNEL, (order)))
#define free_gatt_pages(table, order) \
free_pages((unsigned long)(table), (order))
#else
#include <asm/hypervisor.h>
static inline char*
alloc_gatt_pages(unsigned int order)
{
unsigned long error;
unsigned long ret = __get_free_pages(GFP_KERNEL, (order));
if (ret == 0) {
goto out;
}
error = xen_create_contiguous_region(ret, order, 0);
if (error) {
free_pages(ret, order);
ret = 0;
}
out:
return (char*)ret;
}
static inline void
free_gatt_pages(void* table, unsigned int order)
{
xen_destroy_contiguous_region((unsigned long)table, order);
free_pages((unsigned long)table, order);
}
#endif /* CONFIG_XEN */
#endif /* _ASM_IA64_AGP_H */
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