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arch/x86/acpigen: Add helpers for generating _ADR 

This change adds the following helpers:
acpigen_write_ADR: Generates _ADR object using provided 64-bit address
acpigen_write_ADR_pci_devfn: Generates _ADR object for PCI bus device
using devfn as input.
acpigen_write_ADR_pci_device: Generates _ADR object for PCI
bus device using struct device * as input.

BUG=b:153858769

Signed-off-by: Furquan Shaikh <furquan@google.com>
Change-Id: I139dfc30aa7db303c1e8bd4a8f9ee0933a60139b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40670
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Furquan Shaikh 2020-04-23 11:11:05 -07:00
parent 2f7f0c62fd
commit 1a82923fd2
2 changed files with 28 additions and 0 deletions
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24
src/arch/x86/acpigen.c
View File

@ -17,6 +17,8 @@
#include <assert.h>
#include <console/console.h>
#include <device/device.h>
#include <device/pci_def.h>
#include <device/pci_type.h>
static char *gencurrent;
@ -1840,3 +1842,25 @@ void acpigen_resource_qword(u16 res_type, u16 gen_flags, u16 type_flags,
acpigen_emit_qword(translation);
acpigen_emit_qword(length);
}
void acpigen_write_ADR(uint64_t adr)
{
acpigen_write_name_qword("_ADR", adr);
}
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);
}

4
src/arch/x86/include/arch/acpigen.h
View File

@ -8,6 +8,7 @@
#include <arch/acpi.h>
#include <arch/acpi_device.h>
#include <arch/acpi_pld.h>
#include <device/pci_type.h>
/* Values that can be returned for ACPI Device _STA method */
#define ACPI_STATUS_DEVICE_PRESENT (1 << 0)
@ -369,6 +370,9 @@ void acpigen_write_return_singleton_buffer(uint8_t arg);
void acpigen_write_return_byte(uint8_t arg);
void acpigen_write_upc(enum acpi_upc_type type);
void acpigen_write_pld(const struct acpi_pld *pld);
void acpigen_write_ADR(uint64_t adr);
void acpigen_write_ADR_pci_devfn(pci_devfn_t devfn);
void acpigen_write_ADR_pci_device(const struct device *dev);
/*
* Generate ACPI AML code for _DSM method.
* This function takes as input uuid for the device, set of callbacks and