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Change the behaviour of the ACPI generating code so it only 

writes at most one full ACPI table.
In the cases where both HAVE_LOW_TABLES and HAVE_HIGH_TABLES
are enabled, the table is written to high memory, and an RSDP
is written to the low memory that points to the high mem one.
All other cases work exactly the same way as before.

Signed-off-by: Patrick Georgi <patrick.georgi@coresystems.de>
Acked-by: Myles Watson <mylesgw@gmail.com>


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4202 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Patrick Georgi 2009-04-24 06:28:48 +00:00
parent e9149038ee
commit cec6dc4c15
1 changed files with 11 additions and 4 deletions
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15
src/arch/i386/boot/tables.c
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@ -112,15 +112,22 @@ struct lb_memory *write_tables(void)
/* write them in the rom area because DSDT can be large (8K on epia-m) which
* pushes coreboot table out of first 4K if set up in low table area
*/
#if HAVE_LOW_TABLES == 1
rom_table_end = write_acpi_tables(rom_table_end);
rom_table_end = (rom_table_end+1023) & ~1023;
#endif
#if HAVE_HIGH_TABLES == 1
unsigned long high_rsdp=ALIGN(high_table_end, 16);
if (high_tables_base) {
high_table_end = write_acpi_tables(high_table_end);
high_table_end = (high_table_end+1023) & ~1023;
}
#if HAVE_LOW_TABLES == 1
unsigned long rsdt_location=(unsigned long*)(((acpi_rsdp_t*)high_rsdp)->rsdt_address);
acpi_write_rsdp(rom_table_end, rsdt_location);
rom_table_end = ALIGN(ALIGN(rom_table_end, 16) + sizeof(acpi_rsdp_t), 16);
#endif
#else
#if HAVE_LOW_TABLES == 1
rom_table_end = write_acpi_tables(rom_table_end);
rom_table_end = (rom_table_end+1023) & ~1023;
#endif
#endif
/* copy the smp block to address 0 */
post_code(0x96);