iwlwifi: do not register bands with no supported channels
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / include / asm-x86 / fixmap_32.h
bloba7404d50686b8d7a28c01eb0dd369d69b03dd50f
1 /*
2 * fixmap.h: compile-time virtual memory allocation
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.
8 * Copyright (C) 1998 Ingo Molnar
10 * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999
13 #ifndef _ASM_FIXMAP_H
14 #define _ASM_FIXMAP_H
17 /* used by vmalloc.c, vsyscall.lds.S.
19 * Leave one empty page between vmalloc'ed areas and
20 * the start of the fixmap.
22 extern unsigned long __FIXADDR_TOP;
23 #define FIXADDR_USER_START __fix_to_virt(FIX_VDSO)
24 #define FIXADDR_USER_END __fix_to_virt(FIX_VDSO - 1)
26 #ifndef __ASSEMBLY__
27 #include <linux/kernel.h>
28 #include <asm/acpi.h>
29 #include <asm/apicdef.h>
30 #include <asm/page.h>
31 #ifdef CONFIG_HIGHMEM
32 #include <linux/threads.h>
33 #include <asm/kmap_types.h>
34 #endif
37 * Here we define all the compile-time 'special' virtual
38 * addresses. The point is to have a constant address at
39 * compile time, but to set the physical address only
40 * in the boot process. We allocate these special addresses
41 * from the end of virtual memory (0xfffff000) backwards.
42 * Also this lets us do fail-safe vmalloc(), we
43 * can guarantee that these special addresses and
44 * vmalloc()-ed addresses never overlap.
46 * these 'compile-time allocated' memory buffers are
47 * fixed-size 4k pages. (or larger if used with an increment
48 * highger than 1) use fixmap_set(idx,phys) to associate
49 * physical memory with fixmap indices.
51 * TLB entries of such buffers will not be flushed across
52 * task switches.
54 enum fixed_addresses {
55 FIX_HOLE,
56 FIX_VDSO,
57 FIX_DBGP_BASE,
58 FIX_EARLYCON_MEM_BASE,
59 #ifdef CONFIG_X86_LOCAL_APIC
60 FIX_APIC_BASE, /* local (CPU) APIC) -- required for SMP or not */
61 #endif
62 #ifdef CONFIG_X86_IO_APIC
63 FIX_IO_APIC_BASE_0,
64 FIX_IO_APIC_BASE_END = FIX_IO_APIC_BASE_0 + MAX_IO_APICS-1,
65 #endif
66 #ifdef CONFIG_X86_VISWS_APIC
67 FIX_CO_CPU, /* Cobalt timer */
68 FIX_CO_APIC, /* Cobalt APIC Redirection Table */
69 FIX_LI_PCIA, /* Lithium PCI Bridge A */
70 FIX_LI_PCIB, /* Lithium PCI Bridge B */
71 #endif
72 #ifdef CONFIG_X86_F00F_BUG
73 FIX_F00F_IDT, /* Virtual mapping for IDT */
74 #endif
75 #ifdef CONFIG_X86_CYCLONE_TIMER
76 FIX_CYCLONE_TIMER, /*cyclone timer register*/
77 #endif
78 #ifdef CONFIG_HIGHMEM
79 FIX_KMAP_BEGIN, /* reserved pte's for temporary kernel mappings */
80 FIX_KMAP_END = FIX_KMAP_BEGIN+(KM_TYPE_NR*NR_CPUS)-1,
81 #endif
82 #ifdef CONFIG_ACPI
83 FIX_ACPI_BEGIN,
84 FIX_ACPI_END = FIX_ACPI_BEGIN + FIX_ACPI_PAGES - 1,
85 #endif
86 #ifdef CONFIG_PCI_MMCONFIG
87 FIX_PCIE_MCFG,
88 #endif
89 #ifdef CONFIG_PARAVIRT
90 FIX_PARAVIRT_BOOTMAP,
91 #endif
92 __end_of_permanent_fixed_addresses,
94 * 256 temporary boot-time mappings, used by early_ioremap(),
95 * before ioremap() is functional.
97 * We round it up to the next 512 pages boundary so that we
98 * can have a single pgd entry and a single pte table:
100 #define NR_FIX_BTMAPS 64
101 #define FIX_BTMAPS_NESTING 4
102 FIX_BTMAP_END =
103 __end_of_permanent_fixed_addresses + 512 -
104 (__end_of_permanent_fixed_addresses & 511),
105 FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_NESTING - 1,
106 FIX_WP_TEST,
107 #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
108 FIX_OHCI1394_BASE,
109 #endif
110 __end_of_fixed_addresses
113 extern void __set_fixmap (enum fixed_addresses idx,
114 unsigned long phys, pgprot_t flags);
115 extern void reserve_top_address(unsigned long reserve);
117 #define set_fixmap(idx, phys) \
118 __set_fixmap(idx, phys, PAGE_KERNEL)
120 * Some hardware wants to get fixmapped without caching.
122 #define set_fixmap_nocache(idx, phys) \
123 __set_fixmap(idx, phys, PAGE_KERNEL_NOCACHE)
125 #define clear_fixmap(idx) \
126 __set_fixmap(idx, 0, __pgprot(0))
128 #define FIXADDR_TOP ((unsigned long)__FIXADDR_TOP)
130 #define __FIXADDR_SIZE (__end_of_permanent_fixed_addresses << PAGE_SHIFT)
131 #define __FIXADDR_BOOT_SIZE (__end_of_fixed_addresses << PAGE_SHIFT)
132 #define FIXADDR_START (FIXADDR_TOP - __FIXADDR_SIZE)
133 #define FIXADDR_BOOT_START (FIXADDR_TOP - __FIXADDR_BOOT_SIZE)
135 #define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT))
136 #define __virt_to_fix(x) ((FIXADDR_TOP - ((x)&PAGE_MASK)) >> PAGE_SHIFT)
138 extern void __this_fixmap_does_not_exist(void);
141 * 'index to address' translation. If anyone tries to use the idx
142 * directly without tranlation, we catch the bug with a NULL-deference
143 * kernel oops. Illegal ranges of incoming indices are caught too.
145 static __always_inline unsigned long fix_to_virt(const unsigned int idx)
148 * this branch gets completely eliminated after inlining,
149 * except when someone tries to use fixaddr indices in an
150 * illegal way. (such as mixing up address types or using
151 * out-of-range indices).
153 * If it doesn't get removed, the linker will complain
154 * loudly with a reasonably clear error message..
156 if (idx >= __end_of_fixed_addresses)
157 __this_fixmap_does_not_exist();
159 return __fix_to_virt(idx);
162 static inline unsigned long virt_to_fix(const unsigned long vaddr)
164 BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START);
165 return __virt_to_fix(vaddr);
168 #endif /* !__ASSEMBLY__ */
169 #endif