#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 /* 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 #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 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 */