projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| af170c50 DH |
1 | #ifndef _UAPI_ASM_X86_E820_H |
| 2 | #define _UAPI_ASM_X86_E820_H | |
| 3 | #define E820MAP 0x2d0 /* our map */ | |
| 4 | #define E820MAX 128 /* number of entries in E820MAP */ | |
| 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 | ||
| af170c50 DH |
24 | #ifndef __KERNEL__ |
| 25 | #define E820_X_MAX E820MAX | |
| 26 | #endif | |
| 27 | ||
| 28 | #define E820NR 0x1e8 /* # entries in E820MAP */ | |
| 29 | ||
| 30 | #define E820_RAM 1 | |
| 31 | #define E820_RESERVED 2 | |
| 32 | #define E820_ACPI 3 | |
| 33 | #define E820_NVS 4 | |
| 34 | #define E820_UNUSABLE 5 | |
| 35 | ||
| ec776ef6 CH |
36 | /* |
| 37 | * This is a non-standardized way to represent ADR or NVDIMM regions that | |
| 38 | * persist over a reboot. The kernel will ignore their special capabilities | |
| 39 | * unless the CONFIG_X86_PMEM_LEGACY=y option is set. | |
| 40 | * | |
| 41 | * ( Note that older platforms also used 6 for the same type of memory, | |
| 42 | * but newer versions switched to 12 as 6 was assigned differently. Some | |
| 43 | * time they will learn... ) | |
| 44 | */ | |
| 45 | #define E820_PRAM 12 | |
| af170c50 DH |
46 | |
| 47 | /* | |
| 48 | * reserved RAM used by kernel itself | |
| 49 | * if CONFIG_INTEL_TXT is enabled, memory of this type will be | |
| 50 | * included in the S3 integrity calculation and so should not include | |
| 51 | * any memory that BIOS might alter over the S3 transition | |
| 52 | */ | |
| 53 | #define E820_RESERVED_KERN 128 | |
| 54 | ||
| 55 | #ifndef __ASSEMBLY__ | |
| 56 | #include <linux/types.h> | |
| 57 | struct e820entry { | |
| 58 | __u64 addr; /* start of memory segment */ | |
| 59 | __u64 size; /* size of memory segment */ | |
| 60 | __u32 type; /* type of memory segment */ | |
| 61 | } __attribute__((packed)); | |
| 62 | ||
| 63 | struct e820map { | |
| 64 | __u32 nr_map; | |
| 65 | struct e820entry map[E820_X_MAX]; | |
| 66 | }; | |
| 67 | ||
| 68 | #define ISA_START_ADDRESS 0xa0000 | |
| 69 | #define ISA_END_ADDRESS 0x100000 | |
| 70 | ||
| 71 | #define BIOS_BEGIN 0x000a0000 | |
| 72 | #define BIOS_END 0x00100000 | |
| 73 | ||
| 74 | #define BIOS_ROM_BASE 0xffe00000 | |
| 75 | #define BIOS_ROM_END 0xffffffff | |
| 76 | ||
| 77 | #endif /* __ASSEMBLY__ */ | |
| 78 | ||
| 79 | ||
| 80 | #endif /* _UAPI_ASM_X86_E820_H */ |