1965aae3c9
Change header guards named "ASM_X86__*" to "_ASM_X86_*" since: a. the double underscore is ugly and pointless. b. no leading underscore violates namespace constraints. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
146 lines
4.8 KiB
C
146 lines
4.8 KiB
C
#ifndef _ASM_X86_E820_H
|
|
#define _ASM_X86_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
|
|
#define E820_UNUSABLE 5
|
|
|
|
/* 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 unsigned long pci_mem_start;
|
|
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
|
|
|
|
#ifdef CONFIG_MEMTEST
|
|
extern void early_memtest(unsigned long start, unsigned long end);
|
|
#else
|
|
static inline void early_memtest(unsigned long start, unsigned long end)
|
|
{
|
|
}
|
|
#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 e820_reserve_resources_late(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_X86_E820_H */
|