debuggers.hg

view xen/include/asm-x86/fixmap.h @ 3685:bbe8541361dd

bitkeeper revision 1.1159.1.542 (42038a42_52IAalMZRKdTn0UbVN5fw)

Merge tempest.cl.cam.ac.uk:/auto/groups/xeno-xenod/BK/xeno.bk
into tempest.cl.cam.ac.uk:/local/scratch/smh22/xen-unstable.bk
author smh22@tempest.cl.cam.ac.uk
date Fri Feb 04 14:44:18 2005 +0000 (2005-02-04)
parents d8ba911dce48 fec8b1778268
children 0a4b76b6b5a0
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/acpi.h>
17 #include <asm/apicdef.h>
18 #include <asm/page.h>
20 /*
21 * Here we define all the compile-time 'special' virtual
22 * addresses. The point is to have a constant address at
23 * compile time, but to set the physical address only
24 * in the boot process. We allocate these special addresses
25 * from the end of virtual memory backwards.
26 */
27 enum fixed_addresses {
28 #ifdef CONFIG_X86_LOCAL_APIC
29 FIX_APIC_BASE, /* local (CPU) APIC -- required for SMP or not */
30 #endif
31 #ifdef CONFIG_X86_IO_APIC
32 FIX_IO_APIC_BASE_0,
33 FIX_IO_APIC_BASE_END = FIX_IO_APIC_BASE_0 + MAX_IO_APICS-1,
34 #endif
35 #ifdef CONFIG_ACPI_BOOT
36 FIX_ACPI_BEGIN,
37 FIX_ACPI_END = FIX_ACPI_BEGIN + FIX_ACPI_PAGES - 1,
38 #endif
39 __end_of_fixed_addresses
40 };
42 #define FIXADDR_TOP (IOREMAP_VIRT_END - PAGE_SIZE)
43 #define FIXADDR_SIZE (__end_of_fixed_addresses << PAGE_SHIFT)
44 #define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE)
46 extern void __set_fixmap(
47 enum fixed_addresses idx, unsigned long p, unsigned long flags);
49 #define set_fixmap(idx, phys) \
50 __set_fixmap(idx, phys, PAGE_HYPERVISOR)
52 #define set_fixmap_nocache(idx, phys) \
53 __set_fixmap(idx, phys, PAGE_HYPERVISOR_NOCACHE)
55 #define fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT))
57 #endif