src/arch/x86/lib/pci_ops_mmconf.c

   1 #if CONFIG_MMCONF_SUPPORT
   2
   3 #include <console/console.h>
   4 #include <arch/io.h>
   5 #include <arch/pciconf.h>
   6 #include <device/pci.h>
   7 #include <device/pci_ids.h>
   8 #include <device/pci_ops.h>
   9
  10 /*
  11  * Functions for accessing PCI configuration space with mmconf accesses
  12  */
  13
  14 #define PCI_MMIO_ADDR(SEGBUS, DEVFN, WHERE)     \
  15                                 (CONFIG_MMCONF_BASE_ADDRESS |\
  16                                 (((SEGBUS) & 0xFFF) << 20) |\
  17                                 (((DEVFN) & 0xFF) << 12) |\
  18                                 ((WHERE) & 0xFFF))
  19
  20 #include <arch/mmio_conf.h>
  21
  22 static uint8_t pci_mmconf_read_config8(struct bus *pbus, int bus, int devfn,
  23                                        int where)
  24 {
  25         return (read8x(PCI_MMIO_ADDR(bus, devfn, where)));
  26 }
  27
  28 static uint16_t pci_mmconf_read_config16(struct bus *pbus, int bus, int devfn,
  29                                          int where)
  30 {
  31         return (read16x(PCI_MMIO_ADDR(bus, devfn, where) & ~1));
  32 }
  33
  34 static uint32_t pci_mmconf_read_config32(struct bus *pbus, int bus, int devfn,
  35                                          int where)
  36 {
  37         return (read32x(PCI_MMIO_ADDR(bus, devfn, where) & ~3));
  38 }
  39
  40 static void pci_mmconf_write_config8(struct bus *pbus, int bus, int devfn,
  41                                      int where, uint8_t value)
  42 {
  43         write8x(PCI_MMIO_ADDR(bus, devfn, where), value);
  44 }
  45
  46 static void pci_mmconf_write_config16(struct bus *pbus, int bus, int devfn,
  47                                       int where, uint16_t value)
  48 {
  49         write16x(PCI_MMIO_ADDR(bus, devfn, where) & ~1, value);
  50 }
  51
  52 static void pci_mmconf_write_config32(struct bus *pbus, int bus, int devfn,
  53                                       int where, uint32_t value)
  54 {
  55         write32x(PCI_MMIO_ADDR(bus, devfn, where) & ~3, value);
  56 }
  57
  58 const struct pci_bus_operations pci_ops_mmconf = {
  59         .read8 = pci_mmconf_read_config8,
  60         .read16 = pci_mmconf_read_config16,
  61         .read32 = pci_mmconf_read_config32,
  62         .write8 = pci_mmconf_write_config8,
  63         .write16 = pci_mmconf_write_config16,
  64         .write32 = pci_mmconf_write_config32,
  65 };
  66
  67 #endif