debuggers.hg

view xen/include/asm-x86/fixmap.h @ 22906:700ac6445812

Now add KDB to the non-kdb tree
author Mukesh Rathor
date Thu Feb 03 15:42:41 2011 -0800 (2011-02-03)
parents b48d8f27fca2
children
line source
1 /*
2 * fixmap.h: compile-time virtual memory allocation
3 *
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License. See the file "COPYING" in the main directory of this archive
6 * for more details.
7 *
8 * Copyright (C) 1998 Ingo Molnar
9 * Modifications for Xen are copyright (c) 2002-2004, K A Fraser
10 */
12 #ifndef _ASM_FIXMAP_H
13 #define _ASM_FIXMAP_H
15 #include <xen/config.h>
16 #include <asm/apicdef.h>
17 #include <asm/acpi.h>
18 #include <asm/page.h>
19 #include <xen/kexec.h>
20 #include <xen/iommu.h>
21 #include <asm/amd-iommu.h>
22 #include <asm/msi.h>
23 #include <acpi/apei.h>
25 /*
26 * Here we define all the compile-time 'special' virtual
27 * addresses. The point is to have a constant address at
28 * compile time, but to set the physical address only
29 * in the boot process. We allocate these special addresses
30 * from the end of virtual memory backwards.
31 */
32 enum fixed_addresses {
33 FIX_RESERVED, /* Index 0 is reserved since fix_to_virt(0) > FIXADDR_TOP. */
34 #ifdef __i386__
35 FIX_PAE_HIGHMEM_0,
36 FIX_PAE_HIGHMEM_END = FIX_PAE_HIGHMEM_0 + NR_CPUS-1,
37 #endif
38 FIX_APIC_BASE,
39 FIX_IO_APIC_BASE_0,
40 FIX_IO_APIC_BASE_END = FIX_IO_APIC_BASE_0 + MAX_IO_APICS-1,
41 FIX_ACPI_BEGIN,
42 FIX_ACPI_END = FIX_ACPI_BEGIN + FIX_ACPI_PAGES - 1,
43 FIX_HPET_BASE,
44 FIX_CYCLONE_TIMER,
45 FIX_KEXEC_BASE_0,
46 FIX_KEXEC_BASE_END = FIX_KEXEC_BASE_0 \
47 + ((KEXEC_XEN_NO_PAGES >> 1) * KEXEC_IMAGE_NR) - 1,
48 FIX_IOMMU_REGS_BASE_0,
49 FIX_IOMMU_REGS_END = FIX_IOMMU_REGS_BASE_0 + MAX_IOMMUS-1,
50 FIX_IOMMU_MMIO_BASE_0,
51 FIX_IOMMU_MMIO_END = FIX_IOMMU_MMIO_BASE_0 + IOMMU_PAGES -1,
52 FIX_TBOOT_SHARED_BASE,
53 FIX_MSIX_IO_RESERV_BASE,
54 FIX_MSIX_IO_RESERV_END = FIX_MSIX_IO_RESERV_BASE + FIX_MSIX_MAX_PAGES -1,
55 FIX_TBOOT_MAP_ADDRESS,
56 FIX_APEI_RANGE_BASE,
57 FIX_APEI_RANGE_END = FIX_APEI_RANGE_BASE + FIX_APEI_RANGE_MAX -1,
58 FIX_IGD_MMIO,
59 __end_of_fixed_addresses
60 };
62 #define FIXADDR_TOP (IOREMAP_VIRT_END - PAGE_SIZE)
63 #define FIXADDR_SIZE (__end_of_fixed_addresses << PAGE_SHIFT)
64 #define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE)
66 extern void __set_fixmap(
67 enum fixed_addresses idx, unsigned long mfn, unsigned long flags);
69 #define set_fixmap(idx, phys) \
70 __set_fixmap(idx, (phys)>>PAGE_SHIFT, PAGE_HYPERVISOR)
72 #define set_fixmap_nocache(idx, phys) \
73 __set_fixmap(idx, (phys)>>PAGE_SHIFT, PAGE_HYPERVISOR_NOCACHE)
75 #define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT))
76 #define __virt_to_fix(x) ((FIXADDR_TOP - ((x)&PAGE_MASK)) >> PAGE_SHIFT)
78 #define fix_to_virt(x) (__fix_to_virt(x))
80 static inline unsigned long virt_to_fix(const unsigned long vaddr)
81 {
82 BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START);
83 return __virt_to_fix(vaddr);
84 }
86 #endif