acpigen_pci.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <acpi/acpigen.h>
#include <acpi/acpigen_pci.h>
#include <assert.h>
#include <device/device.h>
#include <device/pci_def.h>
#include <device/pci_type.h>
#include <types.h>
 
void acpigen_write_ADR_pci_devfn(pci_devfn_t devfn)
{
        /*
         * _ADR for PCI Bus is encoded as follows:
         * [63:32] - unused
         * [31:16] - device #
         * [15:0]  - function #
         */
        acpigen_write_ADR(PCI_SLOT(devfn) << 16 | PCI_FUNC(devfn));
}
 
void acpigen_write_ADR_pci_device(const struct device *dev)
{
        assert(dev->path.type == DEVICE_PATH_PCI);
        acpigen_write_ADR_pci_devfn(dev->path.pci.devfn);
}
 
void acpigen_write_PRT_GSI_entry(unsigned int pci_dev, unsigned int acpi_pin, unsigned int gsi)
{
        acpigen_write_package(4);
        acpigen_write_dword((pci_dev << 16) | 0xffff);
        acpigen_write_byte(acpi_pin);
 
        /* Source */
        acpigen_write_byte(0);
 
        /* Source Index */
        acpigen_write_dword(gsi);
 
        acpigen_pop_len(); /* Package */
}
 
void acpigen_write_PRT_source_entry(unsigned int pci_dev, unsigned int acpi_pin,
                                    const char *source_path, unsigned int index)
{
        acpigen_write_package(4);
        acpigen_write_dword((pci_dev << 16) | 0xffff);
        acpigen_write_byte(acpi_pin);
 
        /* Source */
        acpigen_emit_namestring(source_path);
 
        /* Source Index */
        acpigen_write_dword(index);
 
        acpigen_pop_len(); /* Package */
}