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| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/qboot/include/e820.h | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/qboot/include/e820.h')
| -rw-r--r-- | roms/qboot/include/e820.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/roms/qboot/include/e820.h b/roms/qboot/include/e820.h new file mode 100644 index 000000000..09b8f0138 --- /dev/null +++ b/roms/qboot/include/e820.h @@ -0,0 +1,44 @@ +#ifndef BIOS_E820_H +#define BIOS_E820_H + +#define SMAP 0x534d4150 /* ASCII "SMAP" */ + +#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 + * 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 + +struct e820entry { + uint64_t addr; /* start of memory segment */ + uint64_t size; /* size of memory segment */ + uint32_t type; /* type of memory segment */ +} __attribute__((packed)); + +struct e820map { + uint32_t nr_map; + struct e820entry map[]; +}; + +extern struct e820map *e820; + +#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 /* BIOS_E820_H */ |