#include <device/pci_ids.h>
#include <device/pci_ops.h>
-static const struct pci_ops *conf;
-struct pci_ops {
- uint8_t (*read8) (uint8_t bus, int devfn, int where);
- uint16_t (*read16) (uint8_t bus, int devfn, int where);
- uint32_t (*read32) (uint8_t bus, int devfn, int where);
- void (*write8) (uint8_t bus, int devfn, int where, uint8_t val);
- void (*write16) (uint8_t bus, int devfn, int where, uint16_t val);
- void (*write32) (uint8_t bus, int devfn, int where, uint32_t val);
-};
+const struct pci_ops *conf = 0;
/*
* Direct access to PCI hardware...
*/
-
-/*
- * Functions for accessing PCI configuration space with type 1 accesses
- */
-
-#define CONFIG_CMD(bus,devfn, where) (0x80000000 | (bus << 16) | (devfn << 8) | (where & ~3))
-
-static uint8_t pci_conf1_read_config8(unsigned char bus, int devfn, int where)
-{
- outl(CONFIG_CMD(bus, devfn, where), 0xCF8);
- return inb(0xCFC + (where & 3));
-}
-
-static uint16_t pci_conf1_read_config16(unsigned char bus, int devfn, int where)
-{
- outl(CONFIG_CMD(bus, devfn, where), 0xCF8);
- return inw(0xCFC + (where & 2));
-}
-
-static uint32_t pci_conf1_read_config32(unsigned char bus, int devfn, int where)
-{
- outl(CONFIG_CMD(bus, devfn, where), 0xCF8);
- return inl(0xCFC);
-}
-
-static void pci_conf1_write_config8(unsigned char bus, int devfn, int where, uint8_t value)
-{
- outl(CONFIG_CMD(bus, devfn, where), 0xCF8);
- outb(value, 0xCFC + (where & 3));
-}
-
-static void pci_conf1_write_config16(unsigned char bus, int devfn, int where, uint16_t value)
-{
- outl(CONFIG_CMD(bus, devfn, where), 0xCF8);
- outw(value, 0xCFC + (where & 2));
-}
-
-static void pci_conf1_write_config32(unsigned char bus, int devfn, int where, uint32_t value)
-{
- outl(CONFIG_CMD(bus, devfn, where), 0xCF8);
- outl(value, 0xCFC);
-}
-
-#undef CONFIG_CMD
-
-static const struct pci_ops pci_direct_conf1 =
-{
- .read8 = pci_conf1_read_config8,
- .read16 = pci_conf1_read_config16,
- .read32 = pci_conf1_read_config32,
- .write8 = pci_conf1_write_config8,
- .write16 = pci_conf1_write_config16,
- .write32 = pci_conf1_write_config32,
-};
-
-/*
- * Functions for accessing PCI configuration space with type 2 accesses
- */
-
-#define IOADDR(devfn, where) ((0xC000 | ((devfn & 0x78) << 5)) + where)
-#define FUNC(devfn) (((devfn & 7) << 1) | 0xf0)
-#define SET(bus,devfn) outb(FUNC(devfn), 0xCF8); outb(bus, 0xCFA);
-
-static uint8_t pci_conf2_read_config8(unsigned char bus, int devfn, int where)
-{
- uint8_t value;
- SET(bus, devfn);
- value = inb(IOADDR(devfn, where));
- outb(0, 0xCF8);
- return value;
-}
-
-static uint16_t pci_conf2_read_config16(unsigned char bus, int devfn, int where)
-{
- uint16_t value;
- SET(bus, devfn);
- value = inw(IOADDR(devfn, where));
- outb(0, 0xCF8);
- return value;
-}
-
-static uint32_t pci_conf2_read_config32(unsigned char bus, int devfn, int where)
-{
- uint32_t value;
- SET(bus, devfn);
- value = inl(IOADDR(devfn, where));
- outb(0, 0xCF8);
- return value;
-}
-
-static void pci_conf2_write_config8(unsigned char bus, int devfn, int where, uint8_t value)
-{
- SET(bus, devfn);
- outb(value, IOADDR(devfn, where));
- outb(0, 0xCF8);
-}
-
-static void pci_conf2_write_config16(unsigned char bus, int devfn, int where, uint16_t value)
-{
- SET(bus, devfn);
- outw(value, IOADDR(devfn, where));
- outb(0, 0xCF8);
-}
-
-static void pci_conf2_write_config32(unsigned char bus, int devfn, int where, uint32_t value)
-{
- SET(bus, devfn);
- outl(value, IOADDR(devfn, where));
- outb(0, 0xCF8);
-}
-
-#undef SET
-#undef IOADDR
-#undef FUNC
-
-static const struct pci_ops pci_direct_conf2 =
-{
- .read8 = pci_conf2_read_config8,
- .read16 = pci_conf2_read_config16,
- .read32 = pci_conf2_read_config32,
- .write8 = pci_conf2_write_config8,
- .write16 = pci_conf2_write_config16,
- .write32 = pci_conf2_write_config32,
-};
-
-/*
- * Before we decide to use direct hardware access mechanisms, we try to do some
- * trivial checks to ensure it at least _seems_ to be working -- we just test
- * whether bus 00 contains a host bridge (this is similar to checking
- * techniques used in XFree86, but ours should be more reliable since we
- * attempt to make use of direct access hints provided by the PCI BIOS).
- *
- * This should be close to trivial, but it isn't, because there are buggy
- * chipsets (yes, you guessed it, by Intel and Compaq) that have no class ID.
- */
-static int pci_sanity_check(const struct pci_ops *o)
-{
- uint16_t class, vendor;
- uint8_t bus;
- int devfn;
-#define PCI_CLASS_BRIDGE_HOST 0x0600
-#define PCI_CLASS_DISPLAY_VGA 0x0300
-#define PCI_VENDOR_ID_COMPAQ 0x0e11
-#define PCI_VENDOR_ID_INTEL 0x8086
-#define PCI_VENDOR_ID_MOTOROLA 0x1057
-
- for (bus = 0, devfn = 0; devfn < 0x100; devfn++) {
- class = o->read16(bus, devfn, PCI_CLASS_DEVICE);
- vendor = o->read16(bus, devfn, PCI_VENDOR_ID);
- if (((class == PCI_CLASS_BRIDGE_HOST) || (class == PCI_CLASS_DISPLAY_VGA)) ||
- ((vendor == PCI_VENDOR_ID_INTEL) || (vendor == PCI_VENDOR_ID_COMPAQ) ||
- (vendor == PCI_VENDOR_ID_MOTOROLA))) {
- return 1;
- }
- }
- printk_err("PCI: Sanity check failed\n");
- return 0;
-}
-
-static const struct pci_ops *pci_check_direct(void)
-{
- unsigned int tmp;
-
- /*
- * Check if configuration type 1 works.
- */
- {
- outb(0x01, 0xCFB);
- tmp = inl(0xCF8);
- outl(0x80000000, 0xCF8);
- if (inl(0xCF8) == 0x80000000 &&
- pci_sanity_check(&pci_direct_conf1)) {
- outl(tmp, 0xCF8);
- printk_debug("PCI: Using configuration type 1\n");
- return &pci_direct_conf1;
- }
- outl(tmp, 0xCF8);
- }
-
- /*
- * Check if configuration type 2 works.
- */
- {
- outb(0x00, 0xCFB);
- outb(0x00, 0xCF8);
- outb(0x00, 0xCFA);
- if (inb(0xCF8) == 0x00 && inb(0xCFA) == 0x00 &&
- pci_sanity_check(&pci_direct_conf2)) {
- printk_debug("PCI: Using configuration type 2\n");
- return &pci_direct_conf2;
- }
- }
-
- printk_debug("pci_check_direct failed\n");
-
- return 0;
-}
-
uint8_t pci_read_config8(device_t dev, unsigned where)
{
uint8_t value;
dev->bus->secondary, dev->path.u.pci.devfn, where, val);
conf->write32(dev->bus->secondary, dev->path.u.pci.devfn, where, val);
}
-
-/** Set the method to be used for PCI, type I or type II
- */
-void pci_set_method(void)
-{
- conf = &pci_direct_conf1;
- conf = pci_check_direct();
-}
-
-
projects / coreboot.git / blobdiff