payloads/libpayload/drivers/pci_map_bus_ops.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <libpayload.h>
   4 #include <pci.h>
   5
   6 u8 pci_read_config8(pcidev_t dev, u16 reg)
   7 {
   8         uintptr_t cfg_base = pci_map_bus(dev);
   9
  10         return read8((void *)(cfg_base | reg));
  11 }
  12
  13 u16 pci_read_config16(pcidev_t dev, u16 reg)
  14 {
  15         uintptr_t cfg_base = pci_map_bus(dev);
  16
  17         return read16((void *)(cfg_base | (reg & ~1)));
  18 }
  19
  20 u32 pci_read_config32(pcidev_t dev, u16 reg)
  21 {
  22         uintptr_t cfg_base = pci_map_bus(dev);
  23
  24         return read32((void *)(cfg_base | (reg & ~3)));
  25 }
  26
  27 void pci_write_config8(pcidev_t dev, u16 reg, u8 val)
  28 {
  29         uintptr_t cfg_base = pci_map_bus(dev);
  30
  31         write8((void *)(cfg_base | reg), val);
  32 }
  33
  34 void pci_write_config16(pcidev_t dev, u16 reg, u16 val)
  35 {
  36         uintptr_t cfg_base = pci_map_bus(dev);
  37
  38         write16((void *)(cfg_base | (reg & ~1)), val);
  39 }
  40
  41 void pci_write_config32(pcidev_t dev, u16 reg, u32 val)
  42 {
  43         uintptr_t cfg_base = pci_map_bus(dev);
  44
  45         write32((void *)(cfg_base | (reg & ~3)), val);
  46 }