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/*
* fixmap.h: compile-time virtual memory allocation
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1998 Ingo Molnar
* Modifications for Xen are copyright (c) 2002-2004, K A Fraser
*/
#ifndef _ASM_FIXMAP_H
#define _ASM_FIXMAP_H
#include <xen/config.h>
#include <asm/apicdef.h>
#include <asm/acpi.h>
#include <asm/page.h>
#include <xen/kexec.h>
#include <xen/iommu.h>
#include <asm/amd-iommu.h>
#include <asm/msi.h>
/*
* Here we define all the compile-time 'special' virtual
* addresses. The point is to have a constant address at
* compile time, but to set the physical address only
* in the boot process. We allocate these special addresses
* from the end of virtual memory backwards.
*/
enum fixed_addresses {
#ifdef __i386__
FIX_PAE_HIGHMEM_0,
FIX_PAE_HIGHMEM_END = FIX_PAE_HIGHMEM_0 + NR_CPUS-1,
#endif
FIX_APIC_BASE,
FIX_IO_APIC_BASE_0,
FIX_IO_APIC_BASE_END = FIX_IO_APIC_BASE_0 + MAX_IO_APICS-1,
FIX_ACPI_BEGIN,
FIX_ACPI_END = FIX_ACPI_BEGIN + FIX_ACPI_PAGES - 1,
FIX_HPET_BASE,
FIX_CYCLONE_TIMER,
FIX_KEXEC_BASE_0,
FIX_KEXEC_BASE_END = FIX_KEXEC_BASE_0 \
+ ((KEXEC_XEN_NO_PAGES >> 1) * KEXEC_IMAGE_NR) - 1,
FIX_IOMMU_REGS_BASE_0,
FIX_IOMMU_REGS_END = FIX_IOMMU_REGS_BASE_0 + MAX_IOMMUS-1,
FIX_IOMMU_MMIO_BASE_0,
FIX_IOMMU_MMIO_END = FIX_IOMMU_MMIO_BASE_0 + IOMMU_PAGES -1,
FIX_TBOOT_SHARED_BASE,
FIX_MSIX_IO_RESERV_BASE,
FIX_MSIX_IO_RESERV_END = FIX_MSIX_IO_RESERV_BASE + MAX_MSIX_PAGES -1,
__end_of_fixed_addresses
};
#define FIXADDR_TOP (IOREMAP_VIRT_END - PAGE_SIZE)
#define FIXADDR_SIZE (__end_of_fixed_addresses << PAGE_SHIFT)
#define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE)
extern void __set_fixmap(
enum fixed_addresses idx, unsigned long mfn, unsigned long flags);
#define set_fixmap(idx, phys) \
__set_fixmap(idx, (phys)>>PAGE_SHIFT, PAGE_HYPERVISOR)
#define set_fixmap_nocache(idx, phys) \
__set_fixmap(idx, (phys)>>PAGE_SHIFT, PAGE_HYPERVISOR_NOCACHE)
#define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT))
#define __virt_to_fix(x) ((FIXADDR_TOP - ((x)&PAGE_MASK)) >> PAGE_SHIFT)
#define fix_to_virt(x) (__fix_to_virt(x))
static inline unsigned long virt_to_fix(const unsigned long vaddr)
{
BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START);
return __virt_to_fix(vaddr);
}
#endif
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