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This patch adds support for MCFG table, which allows OS to find the

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MMCONFIG for memory mapped PCIe config.

However this patch is not enough to enable it on Linux, Linux do not trust
BIOSes too much, so a small patch to kernel to disable the check if this
region is e820 reserved.

PCI: BIOS Bug: MCFG area at e0000000 is not E820-reserved
PCI: Not using MMCONFIG.

Signed-off-by: Rudolf Marek <r.marek@assembler.cz>
Acked-by: Stefan Reinauer <stepan@coresystems.de>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2936 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Rudolf Marek
2007-11-03 12:50:26 +00:00
committed by Stefan Reinauer
parent ec70af6470
commit e6409f218c
2 changed files with 57 additions and 1 deletions
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34
src/arch/i386/boot/acpi.c
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@@ -65,6 +65,15 @@ void acpi_add_table(acpi_rsdt_t *rsdt, void *table)
printk_warning("ACPI: could not add ACPI table to RSDT. failed.\n");
}
int acpi_create_mcfg_mmconfig(acpi_mcfg_mmconfig_t *mmconfig, u32 base, u16 seg_nr, u8 start, u8 end) {
mmconfig->base_address = base;
mmconfig->base_reserved = 0;
mmconfig->pci_segment_group_number = seg_nr;
mmconfig->start_bus_number = start;
mmconfig->end_bus_number = end;
return (sizeof(acpi_mcfg_mmconfig_t));
}
int acpi_create_madt_lapic(acpi_madt_lapic_t *lapic, u8 cpu, u8 apic)
{
@@ -146,6 +155,31 @@ void acpi_create_madt(acpi_madt_t *madt)
header->checksum = acpi_checksum((void *)madt, header->length);
}
void acpi_create_mcfg(acpi_mcfg_t *mcfg)
{
acpi_header_t *header=&(mcfg->header);
unsigned long current=(unsigned long)mcfg+sizeof(acpi_mcfg_t);
memset((void *)mcfg, 0, sizeof(acpi_mcfg_t));
/* fill out header fields */
memcpy(header->signature, MCFG_NAME, 4);
memcpy(header->oem_id, OEM_ID, 6);
memcpy(header->oem_table_id, MCFG_TABLE, 8);
memcpy(header->asl_compiler_id, ASLC, 4);
header->length = sizeof(acpi_mcfg_t);
header->revision = 1;
current = acpi_fill_mcfg(current);
/* recalculate length */
header->length= current - (unsigned long)mcfg;
header->checksum = acpi_checksum((void *)mcfg, header->length);
}
int acpi_create_srat_lapic(acpi_srat_lapic_t *lapic, u8 node, u8 apic)
{
lapic->type=0;