| /* |
| * 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. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #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> |
| |
| 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; |
| |
| #if CONFIG_GENERATE_ACPI_TABLES |
| current += acpi_create_mcfg_mmconfig((acpi_mcfg_mmconfig_t *) current, |
| pciexbar, 0x0, 0x0, max_buses - 1); |
| #endif |
| return current; |
| } |