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This patch adds "high coreboot table support" to coreboot version 2.

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Some bootloaders seem to overwrite memory starting at 0x600, thus destroying
the coreboot table integrity, rendering the table useless.

By moving the table to the high tables area (if it's activated), this problem
is fixed.

In order to move the table, a 40 bytes mini coreboot table with a single sub
table is placed at 0x500/0x530 that points to the real coreboot table. This is
comparable to the ACPI RSDT or the MP floating table.

This patch also adds "table forward" support to flashrom and nvramtool.

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Peter Stuge <peter@stuge.se>




git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4012 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Stefan Reinauer
2009-03-17 14:39:25 +00:00
committed by Stefan Reinauer
parent efab4ba3bb
commit 3f72e32b06
2 changed files with 29 additions and 8 deletions
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7
util/flashrom/coreboot_tables.h
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@ -135,6 +135,13 @@ struct lb_string {
uint8_t string[0];
};
#define LB_TAG_FORWARD 0x0011
struct lb_forward {
uint32_t tag;
uint32_t size;
uint64_t forward;
};
/* The following structures are for the cmos definitions table */
#define LB_TAG_CMOS_OPTION_TABLE 200
/* cmos header record */