[SeaBIOS] [PATCH 06/20] acpi: add mcfg table for mmconfig
Gerd Hoffmann
kraxel at redhat.com
Tue Nov 27 10:20:10 CET 2012
Signed-off-by: Gerd Hoffmann <kraxel at redhat.com>
---
src/acpi.c | 23 +++++++++++++++++++++++
src/acpi.h | 17 +++++++++++++++++
2 files changed, 40 insertions(+), 0 deletions(-)
diff --git a/src/acpi.c b/src/acpi.c
index 350b55b..86fe501 100644
--- a/src/acpi.c
+++ b/src/acpi.c
@@ -754,6 +754,27 @@ build_srat(void)
return srat;
}
+static void *
+build_mcfg_q35(void)
+{
+ struct acpi_table_mcfg *mcfg;
+
+ int len = sizeof(*mcfg) + 1 * sizeof(mcfg->allocation[0]);
+ mcfg = malloc_high(len);
+ if (!mcfg) {
+ warn_noalloc();
+ return NULL;
+ }
+ memset(mcfg, 0, len);
+ mcfg->allocation[0].address = Q35_HOST_BRIDGE_PCIEXBAR_ADDR;
+ mcfg->allocation[0].pci_segment = Q35_HOST_PCIE_PCI_SEGMENT;
+ mcfg->allocation[0].start_bus_number = Q35_HOST_PCIE_START_BUS_NUMBER;
+ mcfg->allocation[0].end_bus_number = Q35_HOST_PCIE_END_BUS_NUMBER;
+
+ build_header((void *)mcfg, MCFG_SIGNATURE, len, 1);
+ return mcfg;
+}
+
struct rsdp_descriptor *RsdpAddr;
#define MAX_ACPI_TABLES 20
@@ -785,6 +806,8 @@ acpi_bios_init(void)
ACPI_INIT_TABLE(build_madt());
ACPI_INIT_TABLE(build_hpet());
ACPI_INIT_TABLE(build_srat());
+ if (have_ich9)
+ ACPI_INIT_TABLE(build_mcfg_q35());
u16 i, external_tables = qemu_cfg_acpi_additional_tables();
diff --git a/src/acpi.h b/src/acpi.h
index cb21561..715d19d 100644
--- a/src/acpi.h
+++ b/src/acpi.h
@@ -107,4 +107,21 @@ struct bfld {
u64 p1l; /* pci window 1 (above 4g) - length */
} PACKED;
+/* PCI fw r3.0 MCFG table. */
+/* Subtable */
+struct acpi_mcfg_allocation {
+ u64 address; /* Base address, processor-relative */
+ u16 pci_segment; /* PCI segment group number */
+ u8 start_bus_number; /* Starting PCI Bus number */
+ u8 end_bus_number; /* Final PCI Bus number */
+ u32 reserved;
+} PACKED;
+
+#define MCFG_SIGNATURE 0x4746434d // MCFG
+struct acpi_table_mcfg {
+ ACPI_TABLE_HEADER_DEF;
+ u8 reserved[8];
+ struct acpi_mcfg_allocation allocation[0];
+} PACKED;
+
#endif // acpi.h
--
1.7.1
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