src/acpi/acpigen_pci.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <acpi/acpigen.h>
   4 #include <acpi/acpigen_pci.h>
   5 #include <assert.h>
   6 #include <device/device.h>
   7 #include <device/pci_def.h>
   8 #include <device/pci_type.h>
   9 #include <types.h>
  10
  11 void acpigen_write_ADR_pci_devfn(pci_devfn_t devfn)
  12 {
  13         /*
  14          * _ADR for PCI Bus is encoded as follows:
  15          * [63:32] - unused
  16          * [31:16] - device #
  17          * [15:0]  - function #
  18          */
  19         acpigen_write_ADR(PCI_SLOT(devfn) << 16 | PCI_FUNC(devfn));
  20 }
  21
  22 void acpigen_write_ADR_pci_device(const struct device *dev)
  23 {
  24         assert(dev->path.type == DEVICE_PATH_PCI);
  25         acpigen_write_ADR_pci_devfn(dev->path.pci.devfn);
  26 }
  27
  28 void acpigen_write_PRT_GSI_entry(unsigned int pci_dev, unsigned int acpi_pin, unsigned int gsi)
  29 {
  30         acpigen_write_package(4);
  31         acpigen_write_dword((pci_dev << 16) | 0xffff);
  32         acpigen_write_byte(acpi_pin);
  33
  34         /* Source */
  35         acpigen_write_byte(0);
  36
  37         /* Source Index */
  38         acpigen_write_dword(gsi);
  39
  40         acpigen_pop_len(); /* Package */
  41 }
  42
  43 void acpigen_write_PRT_source_entry(unsigned int pci_dev, unsigned int acpi_pin,
  44                                     const char *source_path, unsigned int index)
  45 {
  46         acpigen_write_package(4);
  47         acpigen_write_dword((pci_dev << 16) | 0xffff);
  48         acpigen_write_byte(acpi_pin);
  49
  50         /* Source */
  51         acpigen_emit_namestring(source_path);
  52
  53         /* Source Index */
  54         acpigen_write_dword(index);
  55
  56         acpigen_pop_len(); /* Package */
  57 }