| #ifndef LINUXBIOS_TABLES_H |
| #define LINUXBIOS_TABLES_H |
| |
| #include <stdint.h> |
| |
| /* The linuxbios table information is for conveying information |
| * from the firmware to the loaded OS image. Primarily this |
| * is expected to be information that cannot be discovered by |
| * other means, such as quering the hardware directly. |
| * |
| * All of the information should be Position Independent Data. |
| * That is it should be safe to relocated any of the information |
| * without it's meaning/correctnes changing. For table that |
| * can reasonably be used on multiple architectures the data |
| * size should be fixed. This should ease the transition between |
| * 32 bit and 64 bit architectures etc. |
| * |
| * The completeness test for the information in this table is: |
| * - Can all of the hardware be detected? |
| * - Are the per motherboard constants available? |
| * - Is there enough to allow a kernel to run that was written before |
| * a particular motherboard is constructed? (Assuming the kernel |
| * has drivers for all of the hardware but it does not have |
| * assumptions on how the hardware is connected together). |
| * |
| * With this test it should be straight forward to determine if a |
| * table entry is required or not. This should remove much of the |
| * long term compatibility burden as table entries which are |
| * irrelevant or have been replaced by better alternatives may be |
| * dropped. Of course it is polite and expidite to include extra |
| * table entries and be backwards compatible, but it is not required. |
| */ |
| |
| |
| struct lb_header |
| { |
| uint8_t signature[4]; /* LBIO */ |
| uint32_t header_bytes; |
| uint32_t header_checksum; |
| uint32_t table_bytes; |
| uint32_t table_checksum; |
| uint32_t table_entries; |
| }; |
| |
| /* Every entry in the boot enviroment list will correspond to a boot |
| * info record. Encoding both type and size. The type is obviously |
| * so you can tell what it is. The size allows you to skip that |
| * boot enviroment record if you don't know what it easy. This allows |
| * forward compatibility with records not yet defined. |
| */ |
| struct lb_record { |
| uint32_t tag; /* tag ID */ |
| uint32_t size; /* size of record (in bytes) */ |
| }; |
| |
| #define LB_TAG_UNUSED 0x0000 |
| |
| #define LB_TAG_MEMORY 0x0001 |
| |
| struct lb_memory_range { |
| uint64_t start; |
| uint64_t size; |
| uint32_t type; |
| #define LB_MEM_RAM 1 |
| #define LB_MEM_RESERVED 2 |
| |
| }; |
| |
| struct lb_memory { |
| uint32_t tag; |
| uint32_t size; |
| struct lb_memory_range map[0]; |
| }; |
| |
| #define LB_TAG_HWRPB 0x0002 |
| struct lb_hwrpb { |
| uint32_t tag; |
| uint32_t size; |
| uint64_t hwrpb; |
| }; |
| |
| #define LB_TAG_FORWARD 0x0011 |
| struct lb_forward { |
| uint32_t tag; |
| uint32_t size; |
| uint64_t forward; |
| }; |
| |
| |
| |
| #endif /* LINUXBIOS_TABLES_H */ |