| #ifndef _UAPI_ASM_X86_E820_H | |
| #define _UAPI_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. | |
| */ | |
| #ifndef __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 | |
| #define E820_PMEM 7 | |
| /* | |
| * This is a non-standardized way to represent ADR or NVDIMM regions that | |
| * persist over a reboot. The kernel will ignore their special capabilities | |
| * unless the CONFIG_X86_PMEM_LEGACY option is set. | |
| * | |
| * ( Note that older platforms also used 6 for the same type of memory, | |
| * but newer versions switched to 12 as 6 was assigned differently. Some | |
| * time they will learn... ) | |
| */ | |
| #define E820_PRAM 12 | |
| /* | |
| * reserved RAM used by kernel itself | |
| * if CONFIG_INTEL_TXT is enabled, memory of this type will be | |
| * included in the S3 integrity calculation and so should not include | |
| * any memory that BIOS might alter over the S3 transition | |
| */ | |
| #define E820_RESERVED_KERN 128 | |
| #ifndef __ASSEMBLY__ | |
| #include <linux/types.h> | |
| 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]; | |
| }; | |
| #define ISA_START_ADDRESS 0xa0000 | |
| #define ISA_END_ADDRESS 0x100000 | |
| #define BIOS_BEGIN 0x000a0000 | |
| #define BIOS_END 0x00100000 | |
| #define BIOS_ROM_BASE 0xffe00000 | |
| #define BIOS_ROM_END 0xffffffff | |
| #endif /* __ASSEMBLY__ */ | |
| #endif /* _UAPI_ASM_X86_E820_H */ |