454 lines
15 KiB
C
454 lines
15 KiB
C
/******************************************************************************
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* Copyright (c) 2004, 2008 IBM Corporation
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* Copyright (c) 2008, 2009 Pattrick Hueper <phueper@hueper.net>
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* All rights reserved.
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* This program and the accompanying materials
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* are made available under the terms of the BSD License
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* which accompanies this distribution, and is available at
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* http://www.opensource.org/licenses/bsd-license.php
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*
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* Contributors:
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* IBM Corporation - initial implementation
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*****************************************************************************/
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#include "device.h"
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#include "compat/rtas.h"
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#include <string.h>
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#include "debug.h"
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#include <device/device.h>
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#include <device/pci.h>
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#include <device/pci_ops.h>
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#include <device/resource.h>
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/* the device we are working with... */
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biosemu_device_t bios_device;
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//max. 6 BARs and 1 Exp.ROM plus CfgSpace and 3 legacy ranges
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translate_address_t translate_address_array[11];
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u8 taa_last_entry;
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typedef struct {
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u8 info;
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u8 bus;
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u8 devfn;
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u8 cfg_space_offset;
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u64 address;
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u64 size;
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} __attribute__ ((__packed__)) assigned_address_t;
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#ifdef CONFIG_PCI_OPTION_ROM_RUN_YABEL
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/* coreboot version */
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void
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biosemu_dev_get_addr_info(void)
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{
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int taa_index = 0;
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int i = 0;
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struct resource *r;
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u8 bus = bios_device.dev->bus->link;
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u16 devfn = bios_device.dev->path.pci.devfn;
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bios_device.bus = bus;
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bios_device.devfn = devfn;
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DEBUG_PRINTF("bus: %x, devfn: %x\n", bus, devfn);
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for (i = 0; i < bios_device.dev->resources; i++) {
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r = &bios_device.dev->resource[i];
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translate_address_array[taa_index].info = r->flags;
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translate_address_array[taa_index].bus = bus;
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translate_address_array[taa_index].devfn = devfn;
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translate_address_array[taa_index].cfg_space_offset =
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r->index;
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translate_address_array[taa_index].address = r->base;
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translate_address_array[taa_index].size = r->size;
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/* dont translate addresses... all addresses are 1:1 */
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translate_address_array[taa_index].address_offset = 0;
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taa_index++;
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}
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/* Expansion ROM */
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translate_address_array[taa_index].info = IORESOURCE_MEM | IORESOURCE_READONLY;
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translate_address_array[taa_index].bus = bus;
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translate_address_array[taa_index].devfn = devfn;
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translate_address_array[taa_index].cfg_space_offset = 0x30;
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translate_address_array[taa_index].address = bios_device.img_addr;
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translate_address_array[taa_index].size = 0; /* TODO: do we need the size? */
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/* dont translate addresses... all addresses are 1:1 */
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translate_address_array[taa_index].address_offset = 0;
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taa_index++;
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/* legacy ranges if its a VGA card... */
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if ((bios_device.dev->class & 0xFF0000) == 0x030000) {
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DEBUG_PRINTF("%s: VGA device found, adding legacy resources... \n", __func__);
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/* I/O 0x3B0-0x3BB */
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translate_address_array[taa_index].info = IORESOURCE_FIXED | IORESOURCE_IO;
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translate_address_array[taa_index].bus = bus;
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translate_address_array[taa_index].devfn = devfn;
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translate_address_array[taa_index].cfg_space_offset = 0;
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translate_address_array[taa_index].address = 0x3b0;
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translate_address_array[taa_index].size = 0xc;
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/* dont translate addresses... all addresses are 1:1 */
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translate_address_array[taa_index].address_offset = 0;
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taa_index++;
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/* I/O 0x3C0-0x3DF */
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translate_address_array[taa_index].info = IORESOURCE_FIXED | IORESOURCE_IO;
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translate_address_array[taa_index].bus = bus;
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translate_address_array[taa_index].devfn = devfn;
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translate_address_array[taa_index].cfg_space_offset = 0;
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translate_address_array[taa_index].address = 0x3c0;
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translate_address_array[taa_index].size = 0x20;
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/* dont translate addresses... all addresses are 1:1 */
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translate_address_array[taa_index].address_offset = 0;
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taa_index++;
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/* Mem 0xA0000-0xBFFFF */
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translate_address_array[taa_index].info = IORESOURCE_FIXED | IORESOURCE_MEM;
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translate_address_array[taa_index].bus = bus;
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translate_address_array[taa_index].devfn = devfn;
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translate_address_array[taa_index].cfg_space_offset = 0;
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translate_address_array[taa_index].address = 0xa0000;
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translate_address_array[taa_index].size = 0x20000;
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/* dont translate addresses... all addresses are 1:1 */
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translate_address_array[taa_index].address_offset = 0;
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taa_index++;
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}
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// store last entry index of translate_address_array
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taa_last_entry = taa_index - 1;
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#ifdef CONFIG_DEBUG
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//dump translate_address_array
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printf("translate_address_array: \n");
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translate_address_t ta;
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for (i = 0; i <= taa_last_entry; i++) {
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ta = translate_address_array[i];
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printf
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("%d: info: %08lx bus: %02x devfn: %02x cfg_space_offset: %02x\n\taddr: %016llx\n\toffs: %016llx\n\tsize: %016llx\n",
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i, ta.info, ta.bus, ta.devfn, ta.cfg_space_offset,
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ta.address, ta.address_offset, ta.size);
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}
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#endif
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}
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#else
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// use translate_address_dev and get_puid from net-snk's net_support.c
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void translate_address_dev(u64 *, phandle_t);
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u64 get_puid(phandle_t node);
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// scan all adresses assigned to the device ("assigned-addresses" and "reg")
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// store in translate_address_array for faster translation using dev_translate_address
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void
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biosemu_dev_get_addr_info(void)
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{
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// get bus/dev/fn from assigned-addresses
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int32_t len;
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//max. 6 BARs and 1 Exp.ROM plus CfgSpace and 3 legacy ranges
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assigned_address_t buf[11];
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len =
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of_getprop(bios_device.phandle, "assigned-addresses", buf,
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sizeof(buf));
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bios_device.bus = buf[0].bus;
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bios_device.devfn = buf[0].devfn;
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DEBUG_PRINTF("bus: %x, devfn: %x\n", bios_device.bus,
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bios_device.devfn);
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//store address translations for all assigned-addresses and regs in
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//translate_address_array for faster translation later on...
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int i = 0;
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// index to insert data into translate_address_array
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int taa_index = 0;
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u64 address_offset;
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for (i = 0; i < (len / sizeof(assigned_address_t)); i++, taa_index++) {
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//copy all info stored in assigned-addresses
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translate_address_array[taa_index].info = buf[i].info;
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translate_address_array[taa_index].bus = buf[i].bus;
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translate_address_array[taa_index].devfn = buf[i].devfn;
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translate_address_array[taa_index].cfg_space_offset =
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buf[i].cfg_space_offset;
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translate_address_array[taa_index].address = buf[i].address;
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translate_address_array[taa_index].size = buf[i].size;
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// translate first address and store it as address_offset
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address_offset = buf[i].address;
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translate_address_dev(&address_offset, bios_device.phandle);
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translate_address_array[taa_index].address_offset =
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address_offset - buf[i].address;
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}
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//get "reg" property
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len = of_getprop(bios_device.phandle, "reg", buf, sizeof(buf));
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for (i = 0; i < (len / sizeof(assigned_address_t)); i++) {
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if ((buf[i].size == 0) || (buf[i].cfg_space_offset != 0)) {
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// we dont care for ranges with size 0 and
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// BARs and Expansion ROM must be in assigned-addresses... so in reg
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// we only look for those without config space offset set...
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// i.e. the legacy ranges
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continue;
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}
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//copy all info stored in assigned-addresses
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translate_address_array[taa_index].info = buf[i].info;
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translate_address_array[taa_index].bus = buf[i].bus;
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translate_address_array[taa_index].devfn = buf[i].devfn;
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translate_address_array[taa_index].cfg_space_offset =
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buf[i].cfg_space_offset;
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translate_address_array[taa_index].address = buf[i].address;
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translate_address_array[taa_index].size = buf[i].size;
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// translate first address and store it as address_offset
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address_offset = buf[i].address;
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translate_address_dev(&address_offset, bios_device.phandle);
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translate_address_array[taa_index].address_offset =
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address_offset - buf[i].address;
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taa_index++;
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}
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// store last entry index of translate_address_array
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taa_last_entry = taa_index - 1;
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#ifdef CONFIG_DEBUG
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//dump translate_address_array
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printf("translate_address_array: \n");
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translate_address_t ta;
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for (i = 0; i <= taa_last_entry; i++) {
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ta = translate_address_array[i];
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printf
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("%d: %02x%02x%02x%02x\n\taddr: %016llx\n\toffs: %016llx\n\tsize: %016llx\n",
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i, ta.info, ta.bus, ta.devfn, ta.cfg_space_offset,
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ta.address, ta.address_offset, ta.size);
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}
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#endif
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}
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#endif
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// to simulate accesses to legacy VGA Memory (0xA0000-0xBFFFF)
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// we look for the first prefetchable memory BAR, if no prefetchable BAR found,
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// we use the first memory BAR
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// dev_translate_addr will translate accesses to the legacy VGA Memory into the found vmem BAR
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void
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biosemu_dev_find_vmem_addr(void)
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{
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int i = 0;
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translate_address_t ta;
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s8 tai_np = -1, tai_p = -1; // translate_address_array index for non-prefetchable and prefetchable memory
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//search backwards to find first entry
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for (i = taa_last_entry; i >= 0; i--) {
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ta = translate_address_array[i];
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if ((ta.cfg_space_offset >= 0x10)
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&& (ta.cfg_space_offset <= 0x24)) {
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//only BARs
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if ((ta.info & 0x03) >= 0x02) {
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//32/64bit memory
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tai_np = i;
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if ((ta.info & 0x40) != 0) {
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// prefetchable
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tai_p = i;
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}
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}
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}
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}
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if (tai_p != -1) {
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ta = translate_address_array[tai_p];
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bios_device.vmem_addr = ta.address;
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bios_device.vmem_size = ta.size;
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DEBUG_PRINTF
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("%s: Found prefetchable Virtual Legacy Memory BAR: %llx, size: %llx\n",
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__func__, bios_device.vmem_addr,
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bios_device.vmem_size);
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} else if (tai_np != -1) {
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ta = translate_address_array[tai_np];
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bios_device.vmem_addr = ta.address;
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bios_device.vmem_size = ta.size;
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DEBUG_PRINTF
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("%s: Found non-prefetchable Virtual Legacy Memory BAR: %llx, size: %llx",
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__func__, bios_device.vmem_addr,
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bios_device.vmem_size);
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}
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// disable vmem
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//bios_device.vmem_size = 0;
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}
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#ifndef CONFIG_PCI_OPTION_ROM_RUN_YABEL
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void
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biosemu_dev_get_puid(void)
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{
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// get puid
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bios_device.puid = get_puid(bios_device.phandle);
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DEBUG_PRINTF("puid: 0x%llx\n", bios_device.puid);
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}
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#endif
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void
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biosemu_dev_get_device_vendor_id(void)
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{
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u32 pci_config_0;
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#ifdef CONFIG_PCI_OPTION_ROM_RUN_YABEL
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pci_config_0 = pci_read_config32(bios_device.dev, 0x0);
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#else
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pci_config_0 =
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rtas_pci_config_read(bios_device.puid, 4, bios_device.bus,
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bios_device.devfn, 0x0);
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#endif
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bios_device.pci_device_id =
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(u16) ((pci_config_0 & 0xFFFF0000) >> 16);
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bios_device.pci_vendor_id = (u16) (pci_config_0 & 0x0000FFFF);
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DEBUG_PRINTF("PCI Device ID: %04x, PCI Vendor ID: %x\n",
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bios_device.pci_device_id, bios_device.pci_vendor_id);
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}
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/* Check whether the device has a valid Expansion ROM and search the PCI Data
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* Structure and any Expansion ROM Header (using dev_scan_exp_header()) for
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* needed information. If the rom_addr parameter is != 0, it is the address of
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* the Expansion ROM image and will be used, if it is == 0, the Expansion ROM
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* BAR address will be used.
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*/
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u8
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biosemu_dev_check_exprom(unsigned long rom_base_addr)
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{
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int i = 0;
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translate_address_t ta;
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u16 pci_ds_offset;
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pci_data_struct_t pci_ds;
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if (rom_base_addr == 0) {
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// check for ExpROM Address (Offset 30) in taa
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for (i = 0; i <= taa_last_entry; i++) {
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ta = translate_address_array[i];
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if (ta.cfg_space_offset == 0x30) {
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//translated address
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rom_base_addr = ta.address + ta.address_offset;
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break;
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}
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}
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}
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/* In the ROM there could be multiple Expansion ROM Images... start
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* searching them for an x86 image.
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*/
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do {
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if (rom_base_addr == 0) {
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printf("Error: no Expansion ROM address found!\n");
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return -1;
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}
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set_ci();
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u16 rom_signature = in16le((void *) rom_base_addr);
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clr_ci();
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if (rom_signature != 0xaa55) {
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printf
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("Error: invalid Expansion ROM signature: %02x!\n",
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*((u16 *) rom_base_addr));
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return -1;
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}
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set_ci();
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// at offset 0x18 is the (16bit little-endian) pointer to the PCI Data Structure
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pci_ds_offset = in16le((void *) (rom_base_addr + 0x18));
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//copy the PCI Data Structure
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memcpy(&pci_ds, (void *) (rom_base_addr + pci_ds_offset),
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sizeof(pci_ds));
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clr_ci();
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#ifdef CONFIG_DEBUG
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DEBUG_PRINTF("PCI Data Structure @%lx:\n",
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rom_base_addr + pci_ds_offset);
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dump((void *) &pci_ds, sizeof(pci_ds));
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#endif
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if (strncmp((const char *) pci_ds.signature, "PCIR", 4) != 0) {
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printf("Invalid PCI Data Structure found!\n");
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break;
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}
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//little-endian conversion
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pci_ds.vendor_id = in16le(&pci_ds.vendor_id);
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pci_ds.device_id = in16le(&pci_ds.device_id);
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pci_ds.img_length = in16le(&pci_ds.img_length);
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pci_ds.pci_ds_length = in16le(&pci_ds.pci_ds_length);
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if (pci_ds.vendor_id != bios_device.pci_vendor_id) {
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printf
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("Image has invalid Vendor ID: %04x, expected: %04x\n",
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pci_ds.vendor_id, bios_device.pci_vendor_id);
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break;
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}
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if (pci_ds.device_id != bios_device.pci_device_id) {
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printf
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("Image has invalid Device ID: %04x, expected: %04x\n",
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pci_ds.device_id, bios_device.pci_device_id);
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break;
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}
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DEBUG_PRINTF("Image Length: %d\n", pci_ds.img_length * 512);
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DEBUG_PRINTF("Image Code Type: %d\n", pci_ds.code_type);
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if (pci_ds.code_type == 0) {
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//x86 image
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//store image address and image length in bios_device struct
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bios_device.img_addr = rom_base_addr;
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bios_device.img_size = pci_ds.img_length * 512;
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// we found the image, exit the loop
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break;
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} else {
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// no x86 image, check next image (if any)
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rom_base_addr += pci_ds.img_length * 512;
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}
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if ((pci_ds.indicator & 0x80) == 0x80) {
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//last image found, exit the loop
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DEBUG_PRINTF("Last PCI Expansion ROM Image found.\n");
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break;
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}
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}
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while (bios_device.img_addr == 0);
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// in case we did not find a valid x86 Expansion ROM Image
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if (bios_device.img_addr == 0) {
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printf("Error: no valid x86 Expansion ROM Image found!\n");
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return -1;
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}
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return 0;
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}
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u8
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biosemu_dev_init(struct device * device)
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{
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u8 rval = 0;
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//init bios_device struct
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DEBUG_PRINTF("%s\n", __func__);
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memset(&bios_device, 0, sizeof(bios_device));
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#ifndef CONFIG_PCI_OPTION_ROM_RUN_YABEL
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bios_device.ihandle = of_open(device_name);
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if (bios_device.ihandle == 0) {
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DEBUG_PRINTF("%s is no valid device!\n", device_name);
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return -1;
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}
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bios_device.phandle = of_finddevice(device_name);
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#else
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bios_device.dev = device;
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#endif
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biosemu_dev_get_addr_info();
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#ifndef CONFIG_PCI_OPTION_ROM_RUN_YABEL
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biosemu_dev_find_vmem_addr();
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biosemu_dev_get_puid();
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#endif
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biosemu_dev_get_device_vendor_id();
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return rval;
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}
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// translate address function using translate_address_array assembled
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// by dev_get_addr_info... MUCH faster than calling translate_address_dev
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// and accessing client interface for every translation...
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// returns: 0 if addr not found in translate_address_array, 1 if found.
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u8
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biosemu_dev_translate_address(unsigned long * addr)
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{
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int i = 0;
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translate_address_t ta;
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#ifndef CONFIG_PCI_OPTION_ROM_RUN_YABEL
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/* we dont need this hack for coreboot... we can access legacy areas */
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//check if it is an access to legacy VGA Mem... if it is, map the address
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//to the vmem BAR and then translate it...
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// (translation info provided by Ben Herrenschmidt)
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// NOTE: the translation seems to only work for NVIDIA cards... but it is needed
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// to make some NVIDIA cards work at all...
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if ((bios_device.vmem_size > 0)
|
|
&& ((*addr >= 0xA0000) && (*addr < 0xB8000))) {
|
|
*addr = (*addr - 0xA0000) * 4 + 2 + bios_device.vmem_addr;
|
|
}
|
|
if ((bios_device.vmem_size > 0)
|
|
&& ((*addr >= 0xB8000) && (*addr < 0xC0000))) {
|
|
u8 shift = *addr & 1;
|
|
*addr &= 0xfffffffe;
|
|
*addr = (*addr - 0xB8000) * 4 + shift + bios_device.vmem_addr;
|
|
}
|
|
#endif
|
|
for (i = 0; i <= taa_last_entry; i++) {
|
|
ta = translate_address_array[i];
|
|
if ((*addr >= ta.address) && (*addr <= (ta.address + ta.size))) {
|
|
*addr += ta.address_offset;
|
|
return 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|