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system76-coreboot/util/vgabios/device.c
Stefan Reinauer 05082737a9 Redo testbios utility to use all of YABEL 
Drop buggy duplicate implementation of intXX handlers
and provide enough glue to use all of YABEL.

Change-Id: I2db77a56a2a991cb84876456dcbb3a843a0d9754
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: https://review.coreboot.org/12117
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Tested-by: build bot (Jenkins)
2016-02-18 01:47:04 +01:00

483 lines
16 KiB
C
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/******************************************************************************
* Copyright (c) 2004, 2008 IBM Corporation
* Copyright (c) 2008, 2009 Pattrick Hueper <phueper@hueper.net>
* All rights reserved.
* This program and the accompanying materials
* are made available under the terms of the BSD License
* which accompanies this distribution, and is available at
* http://www.opensource.org/licenses/bsd-license.php
*
* Contributors:
* IBM Corporation - initial implementation
*****************************************************************************/
#include <stdtypes.h>
#include <arch/byteorder.h>
#include "device.h"
#include "compat/rtas.h"
#include <string.h>
#include "debug.h"
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ops.h>
#include <device/resource.h>
/* the device we are working with... */
biosemu_device_t bios_device;
//max. 6 BARs and 1 Exp.ROM plus CfgSpace and 3 legacy ranges, plus 2 "special" memory ranges
translate_address_t translate_address_array[13];
u8 taa_last_entry;
typedef struct {
u8 info;
u8 bus;
u8 devfn;
u8 cfg_space_offset;
u64 address;
u64 size;
} __attribute__ ((__packed__)) assigned_address_t;
#if CONFIG_PCI_OPTION_ROM_RUN_YABEL
/* coreboot version */
static void
biosemu_dev_get_addr_info(void)
{
#if 0
int taa_index = 0;
struct resource *r;
u8 bus = bios_device.dev->bus->secondary;
u16 devfn = bios_device.dev->path.pci.devfn;
bios_device.bus = bus;
bios_device.devfn = devfn;
DEBUG_PRINTF("bus: %x, devfn: %x\n", bus, devfn);
for (r = bios_device.dev->resource_list; r; r = r->next) {
translate_address_array[taa_index].info = r->flags;
translate_address_array[taa_index].bus = bus;
translate_address_array[taa_index].devfn = devfn;
translate_address_array[taa_index].cfg_space_offset =
r->index;
translate_address_array[taa_index].address = r->base;
translate_address_array[taa_index].size = r->size;
/* don't translate addresses... all addresses are 1:1 */
translate_address_array[taa_index].address_offset = 0;
taa_index++;
}
/* Expansion ROM */
translate_address_array[taa_index].info = IORESOURCE_MEM | IORESOURCE_READONLY;
translate_address_array[taa_index].bus = bus;
translate_address_array[taa_index].devfn = devfn;
translate_address_array[taa_index].cfg_space_offset = 0x30;
translate_address_array[taa_index].address = bios_device.img_addr;
translate_address_array[taa_index].size = 0; /* TODO: do we need the size? */
/* don't translate addresses... all addresses are 1:1 */
translate_address_array[taa_index].address_offset = 0;
taa_index++;
/* legacy ranges if its a VGA card... */
if ((bios_device.dev->class & 0xFF0000) == 0x030000) {
DEBUG_PRINTF("%s: VGA device found, adding legacy resources... \n", __func__);
/* I/O 0x3B0-0x3BB */
translate_address_array[taa_index].info = IORESOURCE_FIXED | IORESOURCE_IO;
translate_address_array[taa_index].bus = bus;
translate_address_array[taa_index].devfn = devfn;
translate_address_array[taa_index].cfg_space_offset = 0;
translate_address_array[taa_index].address = 0x3b0;
translate_address_array[taa_index].size = 0xc;
/* don't translate addresses... all addresses are 1:1 */
translate_address_array[taa_index].address_offset = 0;
taa_index++;
/* I/O 0x3C0-0x3DF */
translate_address_array[taa_index].info = IORESOURCE_FIXED | IORESOURCE_IO;
translate_address_array[taa_index].bus = bus;
translate_address_array[taa_index].devfn = devfn;
translate_address_array[taa_index].cfg_space_offset = 0;
translate_address_array[taa_index].address = 0x3c0;
translate_address_array[taa_index].size = 0x20;
/* don't translate addresses... all addresses are 1:1 */
translate_address_array[taa_index].address_offset = 0;
taa_index++;
/* Mem 0xA0000-0xBFFFF */
translate_address_array[taa_index].info = IORESOURCE_FIXED | IORESOURCE_MEM;
translate_address_array[taa_index].bus = bus;
translate_address_array[taa_index].devfn = devfn;
translate_address_array[taa_index].cfg_space_offset = 0;
translate_address_array[taa_index].address = 0xa0000;
translate_address_array[taa_index].size = 0x20000;
/* don't translate addresses... all addresses are 1:1 */
translate_address_array[taa_index].address_offset = 0;
taa_index++;
}
// store last entry index of translate_address_array
taa_last_entry = taa_index - 1;
#if CONFIG_X86EMU_DEBUG
//dump translate_address_array
printf("translate_address_array: \n");
translate_address_t ta;
int i;
for (i = 0; i <= taa_last_entry; i++) {
ta = translate_address_array[i];
printf
("%d: info: %08lx bus: %02x devfn: %02x cfg_space_offset: %02x\n\taddr: %016llx\n\toffs: %016llx\n\tsize: %016llx\n",
i, ta.info, ta.bus, ta.devfn, ta.cfg_space_offset,
ta.address, ta.address_offset, ta.size);
}
#endif
#endif
}
#else
// use translate_address_dev and get_puid from net-snk's net_support.c
void translate_address_dev(u64 *, phandle_t);
u64 get_puid(phandle_t node);
// scan all addresses assigned to the device ("assigned-addresses" and "reg")
// store in translate_address_array for faster translation using dev_translate_address
void
biosemu_dev_get_addr_info(void)
{
// get bus/dev/fn from assigned-addresses
int32_t len;
//max. 6 BARs and 1 Exp.ROM plus CfgSpace and 3 legacy ranges
assigned_address_t buf[11];
len =
of_getprop(bios_device.phandle, "assigned-addresses", buf,
sizeof(buf));
bios_device.bus = buf[0].bus;
bios_device.devfn = buf[0].devfn;
DEBUG_PRINTF("bus: %x, devfn: %x\n", bios_device.bus,
bios_device.devfn);
//store address translations for all assigned-addresses and regs in
//translate_address_array for faster translation later on...
int i = 0;
// index to insert data into translate_address_array
int taa_index = 0;
u64 address_offset;
for (i = 0; i < (len / sizeof(assigned_address_t)); i++, taa_index++) {
//copy all info stored in assigned-addresses
translate_address_array[taa_index].info = buf[i].info;
translate_address_array[taa_index].bus = buf[i].bus;
translate_address_array[taa_index].devfn = buf[i].devfn;
translate_address_array[taa_index].cfg_space_offset =
buf[i].cfg_space_offset;
translate_address_array[taa_index].address = buf[i].address;
translate_address_array[taa_index].size = buf[i].size;
// translate first address and store it as address_offset
address_offset = buf[i].address;
translate_address_dev(&address_offset, bios_device.phandle);
translate_address_array[taa_index].address_offset =
address_offset - buf[i].address;
}
//get "reg" property
len = of_getprop(bios_device.phandle, "reg", buf, sizeof(buf));
for (i = 0; i < (len / sizeof(assigned_address_t)); i++) {
if ((buf[i].size == 0) || (buf[i].cfg_space_offset != 0)) {
// we don't care for ranges with size 0 and
// BARs and Expansion ROM must be in assigned-addresses... so in reg
// we only look for those without config space offset set...
// i.e. the legacy ranges
continue;
}
//copy all info stored in assigned-addresses
translate_address_array[taa_index].info = buf[i].info;
translate_address_array[taa_index].bus = buf[i].bus;
translate_address_array[taa_index].devfn = buf[i].devfn;
translate_address_array[taa_index].cfg_space_offset =
buf[i].cfg_space_offset;
translate_address_array[taa_index].address = buf[i].address;
translate_address_array[taa_index].size = buf[i].size;
// translate first address and store it as address_offset
address_offset = buf[i].address;
translate_address_dev(&address_offset, bios_device.phandle);
translate_address_array[taa_index].address_offset =
address_offset - buf[i].address;
taa_index++;
}
// store last entry index of translate_address_array
taa_last_entry = taa_index - 1;
#if CONFIG_X86EMU_DEBUG
//dump translate_address_array
printf("translate_address_array: \n");
translate_address_t ta;
for (i = 0; i <= taa_last_entry; i++) {
ta = translate_address_array[i];
printf
("%d: %02x%02x%02x%02x\n\taddr: %016llx\n\toffs: %016llx\n\tsize: %016llx\n",
i, ta.info, ta.bus, ta.devfn, ta.cfg_space_offset,
ta.address, ta.address_offset, ta.size);
}
#endif
}
#endif
// "special memory" is a hack to make some parts of memory fall through to real memory
// (ie. no translation). Necessary if option ROMs attempt DMA there, map registers or
// do similarly crazy things.
void
biosemu_add_special_memory(u32 start, u32 size)
{
#if 0
int taa_index = ++taa_last_entry;
translate_address_array[taa_index].info = IORESOURCE_FIXED | IORESOURCE_MEM;
translate_address_array[taa_index].bus = 0;
translate_address_array[taa_index].devfn = 0;
translate_address_array[taa_index].cfg_space_offset = 0;
translate_address_array[taa_index].address = start;
translate_address_array[taa_index].size = size;
/* don't translate addresses... all addresses are 1:1 */
translate_address_array[taa_index].address_offset = 0;
#endif
printf("TODO: Add special memory handler for %x[%x]\n", start, size);
}
#if !CONFIG_PCI_OPTION_ROM_RUN_YABEL
// to simulate accesses to legacy VGA Memory (0xA0000-0xBFFFF)
// we look for the first prefetchable memory BAR, if no prefetchable BAR found,
// we use the first memory BAR
// dev_translate_addr will translate accesses to the legacy VGA Memory into the found vmem BAR
static void
biosemu_dev_find_vmem_addr(void)
{
int i = 0;
translate_address_t ta;
s8 tai_np = -1, tai_p = -1; // translate_address_array index for non-prefetchable and prefetchable memory
//search backwards to find first entry
for (i = taa_last_entry; i >= 0; i--) {
ta = translate_address_array[i];
if ((ta.cfg_space_offset >= 0x10)
&& (ta.cfg_space_offset <= 0x24)) {
//only BARs
if ((ta.info & 0x03) >= 0x02) {
//32/64bit memory
tai_np = i;
if ((ta.info & 0x40) != 0) {
// prefetchable
tai_p = i;
}
}
}
}
if (tai_p != -1) {
ta = translate_address_array[tai_p];
bios_device.vmem_addr = ta.address;
bios_device.vmem_size = ta.size;
DEBUG_PRINTF
("%s: Found prefetchable Virtual Legacy Memory BAR: %llx, size: %llx\n",
__func__, bios_device.vmem_addr,
bios_device.vmem_size);
} else if (tai_np != -1) {
ta = translate_address_array[tai_np];
bios_device.vmem_addr = ta.address;
bios_device.vmem_size = ta.size;
DEBUG_PRINTF
("%s: Found non-prefetchable Virtual Legacy Memory BAR: %llx, size: %llx",
__func__, bios_device.vmem_addr,
bios_device.vmem_size);
}
// disable vmem
//bios_device.vmem_size = 0;
}
void
biosemu_dev_get_puid(void)
{
// get puid
bios_device.puid = get_puid(bios_device.phandle);
DEBUG_PRINTF("puid: 0x%llx\n", bios_device.puid);
}
#endif
static void
biosemu_dev_get_device_vendor_id(void)
{
u32 pci_config_0;
#if CONFIG_PCI_OPTION_ROM_RUN_YABEL
pci_config_0 = pci_read_config32(bios_device.dev, 0x0);
#else
pci_config_0 =
rtas_pci_config_read(bios_device.puid, 4, bios_device.bus,
bios_device.devfn, 0x0);
#endif
bios_device.pci_device_id =
(u16) ((pci_config_0 & 0xFFFF0000) >> 16);
bios_device.pci_vendor_id = (u16) (pci_config_0 & 0x0000FFFF);
DEBUG_PRINTF("PCI Device ID: %04x, PCI Vendor ID: %x\n",
bios_device.pci_device_id, bios_device.pci_vendor_id);
}
/* Check whether the device has a valid Expansion ROM and search the PCI Data
* Structure and any Expansion ROM Header (using dev_scan_exp_header()) for
* needed information. If the rom_addr parameter is != 0, it is the address of
* the Expansion ROM image and will be used, if it is == 0, the Expansion ROM
* BAR address will be used.
*/
u8
biosemu_dev_check_exprom(unsigned long rom_base_addr)
{
#if 0
int i = 0;
translate_address_t ta;
u16 pci_ds_offset;
pci_data_struct_t pci_ds;
if (rom_base_addr == 0) {
// check for ExpROM Address (Offset 30) in taa
for (i = 0; i <= taa_last_entry; i++) {
ta = translate_address_array[i];
if (ta.cfg_space_offset == 0x30) {
//translated address
rom_base_addr = ta.address + ta.address_offset;
break;
}
}
}
/* In the ROM there could be multiple Expansion ROM Images... start
* searching them for an x86 image.
*/
do {
if (rom_base_addr == 0) {
printf("Error: no Expansion ROM address found!\n");
return -1;
}
set_ci();
u16 rom_signature = in16le((void *) rom_base_addr);
clr_ci();
if (rom_signature != 0xaa55) {
printf
("Error: invalid Expansion ROM signature: %02x!\n",
*((u16 *) rom_base_addr));
return -1;
}
set_ci();
// at offset 0x18 is the (16bit little-endian) pointer to the PCI Data Structure
pci_ds_offset = in16le((void *) (rom_base_addr + 0x18));
//copy the PCI Data Structure
memcpy(&pci_ds, (void *) (rom_base_addr + pci_ds_offset),
sizeof(pci_ds));
clr_ci();
#if CONFIG_X86EMU_DEBUG
DEBUG_PRINTF("PCI Data Structure @%lx:\n",
rom_base_addr + pci_ds_offset);
dump((void *) &pci_ds, sizeof(pci_ds));
#endif
if (strncmp((const char *) pci_ds.signature, "PCIR", 4) != 0) {
printf("Invalid PCI Data Structure found!\n");
break;
}
//little-endian conversion
pci_ds.vendor_id = in16le(&pci_ds.vendor_id);
pci_ds.device_id = in16le(&pci_ds.device_id);
pci_ds.img_length = in16le(&pci_ds.img_length);
pci_ds.pci_ds_length = in16le(&pci_ds.pci_ds_length);
#ifdef DO_THIS_TEST_TWICE
if (pci_ds.vendor_id != bios_device.pci_vendor_id) {
printf
("Image has invalid Vendor ID: %04x, expected: %04x\n",
pci_ds.vendor_id, bios_device.pci_vendor_id);
break;
}
if (pci_ds.device_id != bios_device.pci_device_id) {
printf
("Image has invalid Device ID: %04x, expected: %04x\n",
pci_ds.device_id, bios_device.pci_device_id);
break;
}
#endif
DEBUG_PRINTF("Image Length: %d\n", pci_ds.img_length * 512);
DEBUG_PRINTF("Image Code Type: %d\n", pci_ds.code_type);
if (pci_ds.code_type == 0) {
//x86 image
//store image address and image length in bios_device struct
bios_device.img_addr = rom_base_addr;
bios_device.img_size = pci_ds.img_length * 512;
// we found the image, exit the loop
break;
} else {
// no x86 image, check next image (if any)
rom_base_addr += pci_ds.img_length * 512;
}
if ((pci_ds.indicator & 0x80) == 0x80) {
//last image found, exit the loop
DEBUG_PRINTF("Last PCI Expansion ROM Image found.\n");
break;
}
}
while (bios_device.img_addr == 0);
// in case we did not find a valid x86 Expansion ROM Image
if (bios_device.img_addr == 0) {
printf("Error: no valid x86 Expansion ROM Image found!\n");
return -1;
}
#endif
return 0;
}
u8
biosemu_dev_init(struct device * device)
{
u8 rval = 0;
//init bios_device struct
DEBUG_PRINTF("%s\n", __func__);
memset(&bios_device, 0, sizeof(bios_device));
#if !CONFIG_PCI_OPTION_ROM_RUN_YABEL
bios_device.ihandle = of_open(device_name);
if (bios_device.ihandle == 0) {
DEBUG_PRINTF("%s is no valid device!\n", device_name);
return -1;
}
bios_device.phandle = of_finddevice(device_name);
#else
bios_device.dev = device;
#endif
biosemu_dev_get_addr_info();
#if !CONFIG_PCI_OPTION_ROM_RUN_YABEL
biosemu_dev_find_vmem_addr();
biosemu_dev_get_puid();
#endif
biosemu_dev_get_device_vendor_id();
return rval;
}
// translate address function using translate_address_array assembled
// by dev_get_addr_info... MUCH faster than calling translate_address_dev
// and accessing client interface for every translation...
// returns: 0 if addr not found in translate_address_array, 1 if found.
u8
biosemu_dev_translate_address(int type, unsigned long * addr)
{
int i = 0;
translate_address_t ta;
#if !CONFIG_PCI_OPTION_ROM_RUN_YABEL
/* we don't need this hack for coreboot... we can access legacy areas */
//check if it is an access to legacy VGA Mem... if it is, map the address
//to the vmem BAR and then translate it...
// (translation info provided by Ben Herrenschmidt)
// NOTE: the translation seems to only work for NVIDIA cards... but it is needed
// to make some NVIDIA cards work at all...
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)) && (ta.info & type)) {
*addr += ta.address_offset;
return 1;
}
}
return 0;
}
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