| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2012 secunet Security Networks AG |
| * Copyright (C) 2015 Damien Zammit <damien@zamaudio.com> |
| * |
| * 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. |
| */ |
| |
| #define __SIMPLE_DEVICE__ |
| |
| #include <cbmem.h> |
| #include <commonlib/helpers.h> |
| #include <stdint.h> |
| #include <arch/io.h> |
| #include <device/pci_def.h> |
| #include <console/console.h> |
| #include <northbridge/intel/x4x/x4x.h> |
| |
| /** Decodes used Graphics Mode Select (GMS) to kilobytes. */ |
| u32 decode_igd_memory_size(const u32 gms) |
| { |
| static const u16 ggc2uma[] = { 0, 1, 4, 8, 16, |
| 32, 48, 64, 128, 256, 96, 160, 224, 352 }; |
| |
| if (gms > ARRAY_SIZE(ggc2uma)) |
| die("Bad Graphics Mode Select (GMS) setting.\n"); |
| |
| return ggc2uma[gms] << 10; |
| } |
| |
| /** Decodes used GTT Graphics Memory Size (GGMS) to kilobytes. */ |
| u32 decode_igd_gtt_size(const u32 gsm) |
| { |
| static const u8 ggc2gtt[] = { 0, 1, 0, 2, 0, 0, 0, 0, 0, 2, 3, 4}; |
| |
| if (gsm > ARRAY_SIZE(ggc2gtt)) |
| die("Bad GTT Graphics Memory Size (GGMS) setting.\n"); |
| |
| return ggc2gtt[gsm] << 10; |
| } |
| |
| u8 decode_pciebar(u32 *const base, u32 *const len) |
| { |
| *base = 0; |
| *len = 0; |
| const pci_devfn_t dev = PCI_DEV(0,0,0); |
| u32 pciexbar = 0; |
| u32 pciexbar_reg; |
| u32 reg32; |
| int max_buses; |
| const struct { |
| u16 num_buses; |
| u32 addr_mask; |
| } busmask[] = { |
| {256, 0xf0000000}, |
| {128, 0xf8000000}, |
| {64, 0xfc000000}, |
| {0, 0}, |
| }; |
| |
| pciexbar_reg = pci_read_config32(dev, D0F0_PCIEXBAR_LO); |
| |
| if (!(pciexbar_reg & 1)) { |
| printk(BIOS_WARNING, "WARNING: MMCONF not set\n"); |
| return 0; |
| } |
| |
| reg32 = (pciexbar_reg >> 1) & 3; |
| pciexbar = pciexbar_reg & busmask[reg32].addr_mask; |
| max_buses = busmask[reg32].num_buses; |
| |
| if (!pciexbar) { |
| printk(BIOS_WARNING, "WARNING: pciexbar invalid\n"); |
| return 0; |
| } |
| |
| *base = pciexbar; |
| *len = max_buses << 20; |
| return 1; |
| } |
| |
| void *cbmem_top(void) |
| { |
| u32 ramtop = pci_read_config32(PCI_DEV(0,0,0), D0F0_TSEG); |
| return (void*)(ramtop); |
| } |