[mirror_ubuntu-artful-kernel.git] / include / asm-x86 / e820.h

#ifndef __ASM_E820_H
#define __ASM_E820_H
#define E820MAP	0x2d0		/* our map */
#define E820MAX	128		/* number of entries in E820MAP */

/*
 * Legacy E820 BIOS limits us to 128 (E820MAX) nodes due to the
 * constrained space in the zeropage.  If we have more nodes than
 * that, and if we've booted off EFI firmware, then the EFI tables
 * passed us from the EFI firmware can list more nodes.  Size our
 * internal memory map tables to have room for these additional
 * nodes, based on up to three entries per node for which the
 * kernel was built: MAX_NUMNODES == (1 << CONFIG_NODES_SHIFT),
 * plus E820MAX, allowing space for the possible duplicate E820
 * entries that might need room in the same arrays, prior to the
 * call to sanitize_e820_map() to remove duplicates.  The allowance
 * of three memory map entries per node is "enough" entries for
 * the initial hardware platform motivating this mechanism to make
 * use of additional EFI map entries.  Future platforms may want
 * to allow more than three entries per node or otherwise refine
 * this size.
 */

/*
 * Odd: 'make headers_check' complains about numa.h if I try
 * to collapse the next two #ifdef lines to a single line:
 *	#if defined(__KERNEL__) && defined(CONFIG_EFI)
 */
#ifdef __KERNEL__
#ifdef CONFIG_EFI
#include <linux/numa.h>
#define E820_X_MAX (E820MAX + 3 * MAX_NUMNODES)
#else	/* ! CONFIG_EFI */
#define E820_X_MAX E820MAX
#endif
#else	/* ! __KERNEL__ */
#define E820_X_MAX E820MAX
#endif

#define E820NR	0x1e8		/* # entries in E820MAP */

#define E820_RAM	1
#define E820_RESERVED	2
#define E820_ACPI	3
#define E820_NVS	4

/* reserved RAM used by kernel itself */
#define E820_RESERVED_KERN        128

#ifndef __ASSEMBLY__
struct e820entry {
	__u64 addr;	/* start of memory segment */
	__u64 size;	/* size of memory segment */
	__u32 type;	/* type of memory segment */
} __attribute__((packed));

struct e820map {
	__u32 nr_map;
	struct e820entry map[E820_X_MAX];
};

#ifdef __KERNEL__
/* see comment in arch/x86/kernel/e820.c */
extern struct e820map e820;
extern struct e820map e820_saved;

extern int e820_any_mapped(u64 start, u64 end, unsigned type);
extern int e820_all_mapped(u64 start, u64 end, unsigned type);
extern void e820_add_region(u64 start, u64 size, int type);
extern void e820_print_map(char *who);
extern int
sanitize_e820_map(struct e820entry *biosmap, int max_nr_map, int *pnr_map);
extern u64 e820_update_range(u64 start, u64 size, unsigned old_type,
			       unsigned new_type);
extern u64 e820_remove_range(u64 start, u64 size, unsigned old_type,
			     int checktype);
extern void update_e820(void);
extern void e820_setup_gap(void);
extern int e820_search_gap(unsigned long *gapstart, unsigned long *gapsize,
			unsigned long start_addr, unsigned long long end_addr);
struct setup_data;
extern void parse_e820_ext(struct setup_data *data, unsigned long pa_data);

#if defined(CONFIG_X86_64) || \
	(defined(CONFIG_X86_32) && defined(CONFIG_HIBERNATION))
extern void e820_mark_nosave_regions(unsigned long limit_pfn);
#else
static inline void e820_mark_nosave_regions(unsigned long limit_pfn)
{
}
#endif

extern unsigned long end_user_pfn;

extern u64 find_e820_area(u64 start, u64 end, u64 size, u64 align);
extern u64 find_e820_area_size(u64 start, u64 *sizep, u64 align);
extern void reserve_early(u64 start, u64 end, char *name);
extern void reserve_early_overlap_ok(u64 start, u64 end, char *name);
extern void free_early(u64 start, u64 end);
extern void early_res_to_bootmem(u64 start, u64 end);
extern u64 early_reserve_e820(u64 startt, u64 sizet, u64 align);

extern unsigned long e820_end_of_ram_pfn(void);
extern unsigned long e820_end_of_low_ram_pfn(void);
extern int e820_find_active_region(const struct e820entry *ei,
				  unsigned long start_pfn,
				  unsigned long last_pfn,
				  unsigned long *ei_startpfn,
				  unsigned long *ei_endpfn);
extern void e820_register_active_regions(int nid, unsigned long start_pfn,
					 unsigned long end_pfn);
extern u64 e820_hole_size(u64 start, u64 end);
extern void finish_e820_parsing(void);
extern void e820_reserve_resources(void);
extern void setup_memory_map(void);
extern char *default_machine_specific_memory_setup(void);
extern char *machine_specific_memory_setup(void);
extern char *memory_setup(void);
#endif /* __KERNEL__ */
#endif /* __ASSEMBLY__ */

#define ISA_START_ADDRESS	0xa0000
#define ISA_END_ADDRESS		0x100000
#define is_ISA_range(s, e) ((s) >= ISA_START_ADDRESS && (e) < ISA_END_ADDRESS)

#define BIOS_BEGIN		0x000a0000
#define BIOS_END		0x00100000

#ifdef __KERNEL__
#include <linux/ioport.h>

#define HIGH_MEMORY	(1024*1024)
#endif /* __KERNEL__ */

#endif  /* __ASM_E820_H */
Commit	Line	Data
ee8e7cfe RR	1	#ifndef __ASM_E820_H
	2	#define __ASM_E820_H
	3	#define E820MAP 0x2d0 /* our map */
	4	#define E820MAX 128 /* number of entries in E820MAP */
028b7858 PJ	5
	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
ee8e7cfe RR	40	#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
28bb2237 YL	47	/* reserved RAM used by kernel itself */
	48	#define E820_RESERVED_KERN 128
	49
ee8e7cfe RR	50	#ifndef __ASSEMBLY__
	51	struct 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
	57	struct e820map {
	58	__u32 nr_map;
028b7858	59	struct e820entry map[E820_X_MAX];
ee8e7cfe	60	};
b79cd8f1	61
2567d71c	62	#ifdef __KERNEL__
5dfcf14d	63	/* see comment in arch/x86/kernel/e820.c */
b79cd8f1	64	extern struct e820map e820;
5dfcf14d	65	extern struct e820map e820_saved;
b79cd8f1 YL	66
	67	extern int e820_any_mapped(u64 start, u64 end, unsigned type);
	68	extern int e820_all_mapped(u64 start, u64 end, unsigned type);
d0be6bde	69	extern void e820_add_region(u64 start, u64 size, int type);
b79cd8f1	70	extern void e820_print_map(char *who);
c3965bd1	71	extern int
6e9bcc79	72	sanitize_e820_map(struct e820entry biosmap, int max_nr_map, int pnr_map);
d0be6bde	73	extern u64 e820_update_range(u64 start, u64 size, unsigned old_type,
b79cd8f1	74	unsigned new_type);
7a1fd986 YL	75	extern u64 e820_remove_range(u64 start, u64 size, unsigned old_type,
7a1fd986 YL	76	int checktype);
b79cd8f1 YL	77	extern void update_e820(void);
b79cd8f1 YL	78	extern void e820_setup_gap(void);
3381959d	79	extern int e820_search_gap(unsigned long gapstart, unsigned long gapsize,
fd6493e1	80	unsigned long start_addr, unsigned long long end_addr);
8c5beb50 HY	81	struct setup_data;
8c5beb50 HY	82	extern void parse_e820_ext(struct setup_data *data, unsigned long pa_data);
b79cd8f1	83
bf62f398 YL	84	#if defined(CONFIG_X86_64) \|\| \
	85	(defined(CONFIG_X86_32) && defined(CONFIG_HIBERNATION))
	86	extern void e820_mark_nosave_regions(unsigned long limit_pfn);
	87	#else
	88	static inline void e820_mark_nosave_regions(unsigned long limit_pfn)
	89	{
	90	}
	91	#endif
	92
ee0c80fa YL	93	extern unsigned long end_user_pfn;
ee0c80fa YL	94
a4c81cf6 YL	95	extern u64 find_e820_area(u64 start, u64 end, u64 size, u64 align);
	96	extern u64 find_e820_area_size(u64 start, u64 *sizep, u64 align);
	97	extern void reserve_early(u64 start, u64 end, char *name);
c4ba1320	98	extern void reserve_early_overlap_ok(u64 start, u64 end, char *name);
a4c81cf6 YL	99	extern void free_early(u64 start, u64 end);
a4c81cf6 YL	100	extern void early_res_to_bootmem(u64 start, u64 end);
2944e16b	101	extern u64 early_reserve_e820(u64 startt, u64 sizet, u64 align);
a4c81cf6	102
f361a450 YL	103	extern unsigned long e820_end_of_ram_pfn(void);
f361a450 YL	104	extern unsigned long e820_end_of_low_ram_pfn(void);
ee0c80fa YL	105	extern int e820_find_active_region(const struct e820entry *ei,
	106	unsigned long start_pfn,
	107	unsigned long last_pfn,
	108	unsigned long *ei_startpfn,
	109	unsigned long *ei_endpfn);
	110	extern void e820_register_active_regions(int nid, unsigned long start_pfn,
	111	unsigned long end_pfn);
	112	extern u64 e820_hole_size(u64 start, u64 end);
ab4a465e	113	extern void finish_e820_parsing(void);
41c094fd	114	extern void e820_reserve_resources(void);
064d25f1	115	extern void setup_memory_map(void);
95a71a45	116	extern char *default_machine_specific_memory_setup(void);
064d25f1 YL	117	extern char *machine_specific_memory_setup(void);
064d25f1 YL	118	extern char *memory_setup(void);
2567d71c	119	#endif /* __KERNEL__ */
ee8e7cfe RR	120	#endif /* __ASSEMBLY__ */
ee8e7cfe RR	121
306c142f IM	122	#define ISA_START_ADDRESS 0xa0000
306c142f IM	123	#define ISA_END_ADDRESS 0x100000
bcc643dc	124	#define is_ISA_range(s, e) ((s) >= ISA_START_ADDRESS && (e) < ISA_END_ADDRESS)
306c142f	125
950f9d95 TG	126	#define BIOS_BEGIN 0x000a0000
	127	#define BIOS_END 0x00100000
	128
ee8e7cfe	129	#ifdef __KERNEL__
064d25f1 YL	130	#include <linux/ioport.h>
064d25f1 YL	131
064d25f1	132	#define HIGH_MEMORY (1024*1024)
ee8e7cfe RR	133	#endif /* __KERNEL__ */
	134
	135	#endif /* __ASM_E820_H */