diff options
Diffstat (limited to 'src/soc/intel/sch/acpi.c')
-rw-r--r-- | src/soc/intel/sch/acpi.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/src/soc/intel/sch/acpi.c b/src/soc/intel/sch/acpi.c new file mode 100644 index 0000000000..2c941d868e --- /dev/null +++ b/src/soc/intel/sch/acpi.c @@ -0,0 +1,72 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2007-2009 coresystems GmbH + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <types.h> +#include <string.h> +#include <console/console.h> +#include <arch/acpi.h> +#include <arch/acpigen.h> +#include <device/device.h> +#include <device/pci.h> +#include <device/pci_ids.h> +#include <cbmem.h> +#include <arch/acpigen.h> +#include <cpu/cpu.h> +#include "sch.h" + +unsigned long acpi_fill_mcfg(unsigned long current) +{ + device_t dev; + u32 pciexbar = 0; + u32 pciexbar_reg; + int max_buses; + + dev = dev_find_device(0x8086, 0x27a0, 0); + if (!dev) + return current; + + pciexbar_reg = pci_read_config32(dev, 0x48); + + /* MMCFG not supported or not enabled. */ + if (!(pciexbar_reg & (1 << 0))) + return current; + + switch ((pciexbar_reg >> 1) & 3) { + case 0: /* 256MB */ + pciexbar = pciexbar_reg & ((1 << 31) | (1 << 30) | (1 << 29) | + (1 << 28)); + max_buses = 256; + break; + case 1: /* 128M */ + pciexbar = pciexbar_reg & ((1 << 31) | (1 << 30) | (1 << 29) | + (1 << 28) | (1 << 27)); + max_buses = 128; + break; + case 2: /* 64M */ + pciexbar = pciexbar_reg & ((1 << 31) | (1 << 30) | (1 << 29) | + (1 << 28) | (1 << 27) | (1 << 26)); + max_buses = 64; + break; + default: /* RSVD */ + return current; + } + + if (!pciexbar) + return current; + + current += acpi_create_mcfg_mmconfig((acpi_mcfg_mmconfig_t *) current, + pciexbar, 0x0, 0x0, max_buses - 1); + return current; +} |