14e2277962
while others dislike them being extra commits, let's clean them up once and for all for the existing code. If it's ugly, let it only be ugly once :-) Signed-off-by: Stefan Reinauer <stepan@coresystems.de> Acked-by: Stefan Reinauer <stepan@coresystems.de> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5507 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
91 lines
2.6 KiB
C
91 lines
2.6 KiB
C
#ifndef LINUXBIOS_TABLES_H
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#define LINUXBIOS_TABLES_H
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#include <stdint.h>
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/* The linuxbios table information is for conveying information
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* from the firmware to the loaded OS image. Primarily this
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* is expected to be information that cannot be discovered by
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* other means, such as quering the hardware directly.
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*
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* All of the information should be Position Independent Data.
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* That is it should be safe to relocated any of the information
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* without it's meaning/correctnes changing. For table that
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* can reasonably be used on multiple architectures the data
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* size should be fixed. This should ease the transition between
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* 32 bit and 64 bit architectures etc.
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*
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* The completeness test for the information in this table is:
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* - Can all of the hardware be detected?
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* - Are the per motherboard constants available?
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* - Is there enough to allow a kernel to run that was written before
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* a particular motherboard is constructed? (Assuming the kernel
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* has drivers for all of the hardware but it does not have
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* assumptions on how the hardware is connected together).
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*
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* With this test it should be straight forward to determine if a
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* table entry is required or not. This should remove much of the
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* long term compatibility burden as table entries which are
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* irrelevant or have been replaced by better alternatives may be
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* dropped. Of course it is polite and expidite to include extra
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* table entries and be backwards compatible, but it is not required.
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*/
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struct lb_header
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{
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uint8_t signature[4]; /* LBIO */
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uint32_t header_bytes;
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uint32_t header_checksum;
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uint32_t table_bytes;
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uint32_t table_checksum;
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uint32_t table_entries;
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};
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/* Every entry in the boot enviroment list will correspond to a boot
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* info record. Encoding both type and size. The type is obviously
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* so you can tell what it is. The size allows you to skip that
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* boot enviroment record if you don't know what it easy. This allows
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* forward compatibility with records not yet defined.
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*/
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struct lb_record {
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uint32_t tag; /* tag ID */
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uint32_t size; /* size of record (in bytes) */
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};
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#define LB_TAG_UNUSED 0x0000
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#define LB_TAG_MEMORY 0x0001
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struct lb_memory_range {
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uint64_t start;
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uint64_t size;
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uint32_t type;
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#define LB_MEM_RAM 1
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#define LB_MEM_RESERVED 2
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};
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struct lb_memory {
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uint32_t tag;
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uint32_t size;
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struct lb_memory_range map[0];
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};
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#define LB_TAG_HWRPB 0x0002
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struct lb_hwrpb {
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uint32_t tag;
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uint32_t size;
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uint64_t hwrpb;
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};
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#define LB_TAG_FORWARD 0x0011
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struct lb_forward {
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uint32_t tag;
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uint32_t size;
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uint64_t forward;
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};
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#endif /* LINUXBIOS_TABLES_H */
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