bc5399aa6e
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1863 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
80 lines
2.8 KiB
C
80 lines
2.8 KiB
C
#include <console/console.h>
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#include <device/device.h>
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#include <device/pci.h>
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#include <device/pci_ids.h>
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#include <device/pci_ops.h>
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struct rom_header * pci_rom_probe(struct device *dev)
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{
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unsigned long rom_address;
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struct rom_header *rom_header;
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struct pci_data *rom_data;
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rom_address = pci_read_config32(dev, PCI_ROM_ADDRESS);
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if (rom_address == 0x00000000 || rom_address == 0xffffffff) {
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return NULL;
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}
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printk_spew("%s, rom address for %s = %x\n",
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__func__, dev_path(dev), rom_address);
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/* enable expansion ROM address decoding */
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pci_write_config32(dev, PCI_ROM_ADDRESS, rom_address|PCI_ROM_ADDRESS_ENABLE);
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rom_header = rom_address;
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printk_spew("%s, PCI Expansion ROM, signature 0x%04x, \n\t"
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"INIT size 0x%04x, data ptr 0x%04x\n",
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__func__, le32_to_cpu(rom_header->signature),
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rom_header->size * 512, le32_to_cpu(rom_header->data));
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if (le32_to_cpu(rom_header->signature) != PCI_ROM_HDR) {
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printk_err("%s, Incorrect Expansion ROM Header Signature %04x\n",
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__func__, le32_to_cpu(rom_header->signature));
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return NULL;
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}
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rom_data = (unsigned char *) rom_header + le32_to_cpu(rom_header->data);
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printk_spew("%s, PCI ROM Image, Vendor %04x, Device %04x,\n",
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__func__, rom_data->vendor, rom_data->device);
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if (dev->vendor != rom_data->vendor || dev->device != rom_data->device) {
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printk_err("%s, Device or Vendor ID mismatch\n");
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return NULL;
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}
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printk_spew("%s, PCI ROM Image, Class Code %02x%04x, Code Type %02x\n",
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__func__, rom_data->class_hi, rom_data->class_lo,
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rom_data->type);
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if ((dev->class >> 8) != (rom_data->class_hi << 16 | rom_data->class_lo)) {
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printk_err("%s, Class Code mismatch %x\n",
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__func__, dev->class);
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return NULL;
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}
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return rom_header;
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}
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static void *pci_ram_image_start = PCI_RAM_IMAGE_START;
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struct rom_header *pci_rom_load(struct device *dev, struct rom_header *rom_header)
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{
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struct pci_data * rom_data;
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unsigned long rom_address;
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unsigned int rom_size;
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rom_address = pci_read_config32(dev, PCI_ROM_ADDRESS);
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rom_data = (unsigned char *) rom_header + le32_to_cpu(rom_header->data);
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rom_size = rom_header->size*512;
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if (PCI_CLASS_DISPLAY_VGA == (rom_data->class_hi << 16 | rom_data->class_lo)) {
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printk_spew("%s, copying VGA ROM Image from %x to %x, %x bytes\n",
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__func__, rom_header, PCI_VGA_RAM_IMAGE_START, rom_size);
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memcpy(PCI_VGA_RAM_IMAGE_START, rom_header, rom_size);
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return (struct rom_header *) (PCI_VGA_RAM_IMAGE_START);
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} else {
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printk_spew("%s, copying non-VGA ROM Image from %x to %x, %x bytes\n",
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__func__, rom_header, pci_ram_image_start, rom_size);
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memcpy(pci_ram_image_start, rom_header, rom_size);
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pci_ram_image_start += rom_size;
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return (struct rom_header *) pci_ram_image_start;
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}
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/* disable expansion ROM address decoding */
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pci_write_config32(dev, PCI_ROM_ADDRESS, rom_address & ~PCI_ROM_ADDRESS_ENABLE);
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}
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