diff options
Diffstat (limited to 'sys/dev/acpica/acpi.c')
| -rw-r--r-- | sys/dev/acpica/acpi.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/sys/dev/acpica/acpi.c b/sys/dev/acpica/acpi.c index f3e6f16..a291152 100644 --- a/sys/dev/acpica/acpi.c +++ b/sys/dev/acpica/acpi.c @@ -48,6 +48,9 @@ __FBSDID("$FreeBSD$"); #include <sys/sbuf.h> #include <sys/smp.h> +#if defined(__i386__) || defined(__amd64__) +#include <machine/pci_cfgreg.h> +#endif #include <machine/resource.h> #include <machine/bus.h> #include <sys/rman.h> @@ -152,6 +155,9 @@ static int acpi_child_location_str_method(device_t acdev, device_t child, char *buf, size_t buflen); static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, char *buf, size_t buflen); +#if defined(__i386__) || defined(__amd64__) +static void acpi_enable_pcie(void); +#endif static device_method_t acpi_methods[] = { /* Device interface */ @@ -448,6 +454,11 @@ acpi_attach(device_t dev) goto out; } +#if defined(__i386__) || defined(__amd64__) + /* Handle MCFG table if present. */ + acpi_enable_pcie(); +#endif + /* Install the default address space handlers. */ status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); @@ -1466,6 +1477,36 @@ acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) return_VALUE (result); } +#if defined(__i386__) || defined(__amd64__) +/* + * Look for a MCFG table. If it is present, use the settings for + * domain (segment) 0 to setup PCI config space access via the memory + * map. + */ +static void +acpi_enable_pcie(void) +{ + ACPI_TABLE_HEADER *hdr; + ACPI_MCFG_ALLOCATION *alloc, *end; + ACPI_STATUS status; + + status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); + if (ACPI_FAILURE(status)) + return; + + end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); + alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); + while (alloc < end) { + if (alloc->PciSegment == 0) { + pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, + alloc->EndBusNumber); + return; + } + alloc++; + } +} +#endif + /* * Scan all of the ACPI namespace and attach child devices. * |
