src/device/pci_rom.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2005 Li-Ta Lo <ollie@lanl.gov>
   5  * Copyright (C) 2005 Tyan
   6  * (Written by Yinghai Lu <yhlu@tyan.com> for Tyan)
   7  * Copyright (C) 2005 Ronald G. Minnich <rminnich@gmail.com>
   8  * Copyright (C) 2005-2007 Stefan Reinauer <stepan@openbios.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; version 2 of the License.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  */
  19
  20 #include <console/console.h>
  21 #include <device/device.h>
  22 #include <device/pci.h>
  23 #include <device/pci_ids.h>
  24 #include <device/pci_ops.h>
  25 #include <string.h>
  26 #include <cbfs.h>
  27
  28 /* Rmodules don't like weak symbols. */
  29 u32 __attribute__((weak)) map_oprom_vendev(u32 vendev) { return vendev; }
  30
  31 struct rom_header *pci_rom_probe(struct device *dev)
  32 {
  33         struct rom_header *rom_header;
  34         struct pci_data *rom_data;
  35
  36         /* If it's in FLASH, then don't check device for ROM. */
  37         rom_header = cbfs_boot_map_optionrom(dev->vendor, dev->device);
  38
  39         u32 vendev = (dev->vendor << 16) | dev->device;
  40         u32 mapped_vendev = vendev;
  41
  42         mapped_vendev = map_oprom_vendev(vendev);
  43
  44         if (!rom_header) {
  45                 if (vendev != mapped_vendev) {
  46                         rom_header = cbfs_boot_map_optionrom(
  47                                         mapped_vendev >> 16,
  48                                         mapped_vendev & 0xffff);
  49                 }
  50         }
  51
  52         if (rom_header) {
  53                 printk(BIOS_DEBUG, "In CBFS, ROM address for %s = %p\n",
  54                        dev_path(dev), rom_header);
  55         } else {
  56                 uintptr_t rom_address;
  57
  58                 rom_address = pci_read_config32(dev, PCI_ROM_ADDRESS);
  59
  60                 if (rom_address == 0x00000000 || rom_address == 0xffffffff) {
  61 #if CONFIG_BOARD_EMULATION_QEMU_X86
  62                         if ((dev->class >> 8) == PCI_CLASS_DISPLAY_VGA)
  63                                 rom_address = 0xc0000;
  64                         else
  65 #endif
  66                                 return NULL;
  67                 } else {
  68                         /* Enable expansion ROM address decoding. */
  69                         pci_write_config32(dev, PCI_ROM_ADDRESS,
  70                                            rom_address|PCI_ROM_ADDRESS_ENABLE);
  71                 }
  72
  73 #if CONFIG_ON_DEVICE_ROM_RUN
  74                 printk(BIOS_DEBUG, "Option ROM address for %s = %lx\n",
  75                        dev_path(dev), (unsigned long)rom_address);
  76                 rom_header = (struct rom_header *)rom_address;
  77 #else
  78                 printk(BIOS_DEBUG, "Option ROM execution disabled "
  79                         "for %s\n", dev_path(dev));
  80                 return NULL;
  81 #endif
  82         }
  83
  84         printk(BIOS_SPEW, "PCI expansion ROM, signature 0x%04x, "
  85                "INIT size 0x%04x, data ptr 0x%04x\n",
  86                le32_to_cpu(rom_header->signature),
  87                rom_header->size * 512, le32_to_cpu(rom_header->data));
  88
  89         if (le32_to_cpu(rom_header->signature) != PCI_ROM_HDR) {
  90                 printk(BIOS_ERR, "Incorrect expansion ROM header "
  91                        "signature %04x\n", le32_to_cpu(rom_header->signature));
  92                 return NULL;
  93         }
  94
  95         rom_data = (((void *)rom_header) + le32_to_cpu(rom_header->data));
  96
  97         printk(BIOS_SPEW, "PCI ROM image, vendor ID %04x, device ID %04x,\n",
  98                rom_data->vendor, rom_data->device);
  99         /* If the device id is mapped, a mismatch is expected */
 100         if ((dev->vendor != rom_data->vendor
 101             || dev->device != rom_data->device)
 102             && (vendev == mapped_vendev)) {
 103                 printk(BIOS_ERR, "ID mismatch: vendor ID %04x, "
 104                        "device ID %04x\n", rom_data->vendor, rom_data->device);
 105                 return NULL;
 106         }
 107
 108         printk(BIOS_SPEW, "PCI ROM image, Class Code %04x%02x, "
 109                "Code Type %02x\n", rom_data->class_hi, rom_data->class_lo,
 110                rom_data->type);
 111
 112         if (dev->class != ((rom_data->class_hi << 8) | rom_data->class_lo)) {
 113                 printk(BIOS_DEBUG, "Class Code mismatch ROM %08x, dev %08x\n",
 114                        (rom_data->class_hi << 8) | rom_data->class_lo,
 115                        dev->class);
 116                 // return NULL;
 117         }
 118
 119         return rom_header;
 120 }
 121
 122 static void *pci_ram_image_start = (void *)PCI_RAM_IMAGE_START;
 123
 124 struct rom_header *pci_rom_load(struct device *dev,
 125                                 struct rom_header *rom_header)
 126 {
 127         struct pci_data * rom_data;
 128         unsigned int rom_size;
 129         unsigned int image_size=0;
 130
 131         do {
 132                 /* Get next image. */
 133                 rom_header = (struct rom_header *)((void *) rom_header
 134                                                             + image_size);
 135
 136                 rom_data = (struct pci_data *)((void *) rom_header
 137                                 + le32_to_cpu(rom_header->data));
 138
 139                 image_size = le32_to_cpu(rom_data->ilen) * 512;
 140         } while ((rom_data->type != 0) && (rom_data->indicator != 0)); // make sure we got x86 version
 141
 142         if (rom_data->type != 0)
 143                 return NULL;
 144
 145         rom_size = rom_header->size * 512;
 146
 147         /*
 148          * We check to see if the device thinks it is a VGA device not
 149          * whether the ROM image is for a VGA device because some
 150          * devices have a mismatch between the hardware and the ROM.
 151          */
 152         if (PCI_CLASS_DISPLAY_VGA == (dev->class >> 8)) {
 153 #if !CONFIG_MULTIPLE_VGA_ADAPTERS
 154                 extern device_t vga_pri; /* Primary VGA device (device.c). */
 155                 if (dev != vga_pri) return NULL; /* Only one VGA supported. */
 156 #endif
 157                 if ((void *)PCI_VGA_RAM_IMAGE_START != rom_header) {
 158                         printk(BIOS_DEBUG, "Copying VGA ROM Image from %p to "
 159                                "0x%x, 0x%x bytes\n", rom_header,
 160                                PCI_VGA_RAM_IMAGE_START, rom_size);
 161                         memcpy((void *)PCI_VGA_RAM_IMAGE_START, rom_header,
 162                                rom_size);
 163                 }
 164                 return (struct rom_header *) (PCI_VGA_RAM_IMAGE_START);
 165         }
 166
 167         printk(BIOS_DEBUG, "Copying non-VGA ROM image from %p to %p, 0x%x "
 168                "bytes\n", rom_header, pci_ram_image_start, rom_size);
 169
 170         memcpy(pci_ram_image_start, rom_header, rom_size);
 171         pci_ram_image_start += rom_size;
 172         return (struct rom_header *) (pci_ram_image_start-rom_size);
 173 }