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Rusty Russellee8e7cf2007-10-22 10:56:19 +10001#ifndef __ASM_E820_H
2#define __ASM_E820_H
3#define E820MAP 0x2d0 /* our map */
4#define E820MAX 128 /* number of entries in E820MAP */
Paul Jackson028b7852008-05-14 08:15:40 -07005
6/*
7 * Legacy E820 BIOS limits us to 128 (E820MAX) nodes due to the
8 * constrained space in the zeropage. If we have more nodes than
9 * that, and if we've booted off EFI firmware, then the EFI tables
10 * passed us from the EFI firmware can list more nodes. Size our
11 * internal memory map tables to have room for these additional
12 * nodes, based on up to three entries per node for which the
13 * kernel was built: MAX_NUMNODES == (1 << CONFIG_NODES_SHIFT),
14 * plus E820MAX, allowing space for the possible duplicate E820
15 * entries that might need room in the same arrays, prior to the
16 * call to sanitize_e820_map() to remove duplicates. The allowance
17 * of three memory map entries per node is "enough" entries for
18 * the initial hardware platform motivating this mechanism to make
19 * use of additional EFI map entries. Future platforms may want
20 * to allow more than three entries per node or otherwise refine
21 * this size.
22 */
23
24/*
25 * Odd: 'make headers_check' complains about numa.h if I try
26 * to collapse the next two #ifdef lines to a single line:
27 * #if defined(__KERNEL__) && defined(CONFIG_EFI)
28 */
29#ifdef __KERNEL__
30#ifdef CONFIG_EFI
31#include <linux/numa.h>
32#define E820_X_MAX (E820MAX + 3 * MAX_NUMNODES)
33#else /* ! CONFIG_EFI */
34#define E820_X_MAX E820MAX
35#endif
36#else /* ! __KERNEL__ */
37#define E820_X_MAX E820MAX
38#endif
39
Rusty Russellee8e7cf2007-10-22 10:56:19 +100040#define E820NR 0x1e8 /* # entries in E820MAP */
41
42#define E820_RAM 1
43#define E820_RESERVED 2
44#define E820_ACPI 3
45#define E820_NVS 4
46
Yinghai Lu28bb2232008-06-30 16:20:54 -070047/* reserved RAM used by kernel itself */
48#define E820_RESERVED_KERN 128
49
Rusty Russellee8e7cf2007-10-22 10:56:19 +100050#ifndef __ASSEMBLY__
51struct e820entry {
52 __u64 addr; /* start of memory segment */
53 __u64 size; /* size of memory segment */
54 __u32 type; /* type of memory segment */
55} __attribute__((packed));
56
57struct e820map {
58 __u32 nr_map;
Paul Jackson028b7852008-05-14 08:15:40 -070059 struct e820entry map[E820_X_MAX];
Rusty Russellee8e7cf2007-10-22 10:56:19 +100060};
Yinghai Lub79cd8f2008-05-11 00:30:15 -070061
Rusty Russell2567d712008-07-15 15:02:27 +100062#ifdef __KERNEL__
Bernhard Walle5dfcf142008-06-27 13:12:55 +020063/* see comment in arch/x86/kernel/e820.c */
Yinghai Lub79cd8f2008-05-11 00:30:15 -070064extern struct e820map e820;
Bernhard Walle5dfcf142008-06-27 13:12:55 +020065extern struct e820map e820_saved;
Yinghai Lub79cd8f2008-05-11 00:30:15 -070066
67extern int e820_any_mapped(u64 start, u64 end, unsigned type);
68extern int e820_all_mapped(u64 start, u64 end, unsigned type);
Yinghai Lud0be6bd2008-06-15 18:58:51 -070069extern void e820_add_region(u64 start, u64 size, int type);
Yinghai Lub79cd8f2008-05-11 00:30:15 -070070extern void e820_print_map(char *who);
Paul Jacksonc3965bd2008-05-14 08:15:34 -070071extern int
Paul Jackson6e9bcc72008-05-14 08:15:46 -070072sanitize_e820_map(struct e820entry *biosmap, int max_nr_map, int *pnr_map);
Yinghai Lud0be6bd2008-06-15 18:58:51 -070073extern u64 e820_update_range(u64 start, u64 size, unsigned old_type,
Yinghai Lub79cd8f2008-05-11 00:30:15 -070074 unsigned new_type);
Yinghai Lu7a1fd982008-06-21 14:48:05 -070075extern u64 e820_remove_range(u64 start, u64 size, unsigned old_type,
76 int checktype);
Yinghai Lub79cd8f2008-05-11 00:30:15 -070077extern void update_e820(void);
78extern void e820_setup_gap(void);
Alok Kataria33819592008-06-24 11:48:30 -070079extern int e820_search_gap(unsigned long *gapstart, unsigned long *gapsize,
Alok Katariafd6493e2008-06-25 11:02:42 -070080 unsigned long start_addr, unsigned long long end_addr);
Huang, Ying8c5beb52008-06-11 11:33:39 +080081struct setup_data;
82extern void parse_e820_ext(struct setup_data *data, unsigned long pa_data);
Yinghai Lub79cd8f2008-05-11 00:30:15 -070083
Yinghai Lubf62f392008-05-20 20:10:58 -070084#if defined(CONFIG_X86_64) || \
85 (defined(CONFIG_X86_32) && defined(CONFIG_HIBERNATION))
86extern void e820_mark_nosave_regions(unsigned long limit_pfn);
87#else
88static inline void e820_mark_nosave_regions(unsigned long limit_pfn)
89{
90}
91#endif
92
Yinghai Lu1f067162008-07-15 00:02:28 -070093#ifdef CONFIG_MEMTEST
94extern void early_memtest(unsigned long start, unsigned long end);
95#else
96static inline void early_memtest(unsigned long start, unsigned long end)
97{
98}
99#endif
100
Yinghai Luee0c80f2008-06-03 19:34:00 -0700101extern unsigned long end_user_pfn;
102
Yinghai Lua4c81cf2008-05-18 01:18:57 -0700103extern u64 find_e820_area(u64 start, u64 end, u64 size, u64 align);
104extern u64 find_e820_area_size(u64 start, u64 *sizep, u64 align);
105extern void reserve_early(u64 start, u64 end, char *name);
Paul Jacksonc4ba1322008-06-22 07:22:07 -0700106extern void reserve_early_overlap_ok(u64 start, u64 end, char *name);
Yinghai Lua4c81cf2008-05-18 01:18:57 -0700107extern void free_early(u64 start, u64 end);
108extern void early_res_to_bootmem(u64 start, u64 end);
Yinghai Lu2944e162008-06-01 13:17:38 -0700109extern u64 early_reserve_e820(u64 startt, u64 sizet, u64 align);
Yinghai Lua4c81cf2008-05-18 01:18:57 -0700110
Yinghai Luf361a452008-07-10 20:38:26 -0700111extern unsigned long e820_end_of_ram_pfn(void);
112extern unsigned long e820_end_of_low_ram_pfn(void);
Yinghai Luee0c80f2008-06-03 19:34:00 -0700113extern int e820_find_active_region(const struct e820entry *ei,
114 unsigned long start_pfn,
115 unsigned long last_pfn,
116 unsigned long *ei_startpfn,
117 unsigned long *ei_endpfn);
118extern void e820_register_active_regions(int nid, unsigned long start_pfn,
119 unsigned long end_pfn);
120extern u64 e820_hole_size(u64 start, u64 end);
Yinghai Luab4a4652008-06-10 12:55:54 -0700121extern void finish_e820_parsing(void);
Yinghai Lu41c094f2008-06-16 13:03:31 -0700122extern void e820_reserve_resources(void);
Yinghai Lu064d25f2008-06-16 19:58:28 -0700123extern void setup_memory_map(void);
Yinghai Lu95a71a42008-06-18 17:27:08 -0700124extern char *default_machine_specific_memory_setup(void);
Yinghai Lu064d25f2008-06-16 19:58:28 -0700125extern char *machine_specific_memory_setup(void);
126extern char *memory_setup(void);
Rusty Russell2567d712008-07-15 15:02:27 +1000127#endif /* __KERNEL__ */
Rusty Russellee8e7cf2007-10-22 10:56:19 +1000128#endif /* __ASSEMBLY__ */
129
Ingo Molnar306c1422008-01-30 13:33:08 +0100130#define ISA_START_ADDRESS 0xa0000
131#define ISA_END_ADDRESS 0x100000
Andreas Herrmannbcc643d2008-06-20 21:58:46 +0200132#define is_ISA_range(s, e) ((s) >= ISA_START_ADDRESS && (e) < ISA_END_ADDRESS)
Ingo Molnar306c1422008-01-30 13:33:08 +0100133
Thomas Gleixner950f9d92008-01-30 13:34:06 +0100134#define BIOS_BEGIN 0x000a0000
135#define BIOS_END 0x00100000
136
Rusty Russellee8e7cf2007-10-22 10:56:19 +1000137#ifdef __KERNEL__
Yinghai Lu064d25f2008-06-16 19:58:28 -0700138#include <linux/ioport.h>
139
Yinghai Lu064d25f2008-06-16 19:58:28 -0700140#define HIGH_MEMORY (1024*1024)
Rusty Russellee8e7cf2007-10-22 10:56:19 +1000141#endif /* __KERNEL__ */
142
143#endif /* __ASM_E820_H */