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
68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
#ifndef _LINUX_UNIFORM_BOOT_H
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#define _LINUX_UNIFORM_BOOT_H
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/* The uniform boot environment information is restricted to
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* hardware information. In particular for a simple enough machine
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* all of the environment information should be able to reside in
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* a rom and not need to be moved. This information is the
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* information a trivial boot room can pass to linux to let it
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* run the hardware.
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*
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* Also 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. The exception is the
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* uniform_boot_header with it's two pointers arg & env.
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*
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* The addresses in the arg & env pointers must be physical
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* addresses. A physical address is an address you put in the page
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* table.
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*
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* The Command line is for user policy. Things like the default
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* root device.
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*
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*/
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struct uniform_boot_header
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{
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unsigned long header_bytes;
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unsigned long header_checksum;
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unsigned long arg;
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unsigned long arg_bytes;
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unsigned long env;
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unsigned long env_bytes;
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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 ube_record {
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unsigned long tag; /* tag ID */
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unsigned long size; /* size of record (in bytes) */
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unsigned long data[0]; /* data */
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};
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#define UBE_TAG_MEMORY 0x0001
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struct ube_memory_range {
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unsigned long long start;
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unsigned long long size;
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unsigned long type;
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#define UBE_MEM_RAM 1
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#define UBE_MEM_RESERVED 2
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#define UBE_MEM_ACPI 3
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#define UBE_MEM_NVS 4
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};
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struct ube_memory {
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unsigned long tag;
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unsigned long size;
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struct ube_memory_range map[0];
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};
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#endif /* _LINUX_UNIFORM_BOOT_H */
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