40d93494c3
Allow bootblock to get access to the static device tree like other early stages. device_romstage.c was renamed to device_simple.c to better articulate the usage since it's not just being used in romstage. BUG=chrome-os-partner:55357 Change-Id: I3d63d2754c737cc738c09a3e3b3b468362fb78d1 Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: https://review.coreboot.org/15837 Reviewed-by: Furquan Shaikh <furquan@google.com> Reviewed-by: Subrata Banik <subrata.banik@intel.com> Tested-by: build bot (Jenkins)
120 lines
3.2 KiB
C
120 lines
3.2 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2003-2004 Linux Networx
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* (Written by Eric Biederman <ebiederman@lnxi.com> for Linux Networx)
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* Copyright (C) 2003 Greg Watson <jarrah@users.sourceforge.net>
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* Copyright (C) 2004 Li-Ta Lo <ollie@lanl.gov>
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* Copyright (C) 2005-2006 Tyan
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* (Written by Yinghai Lu <yhlu@tyan.com> for Tyan)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <device/device.h>
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#include <device/path.h>
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#include <device/pci.h>
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#include <device/resource.h>
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/** Linked list of ALL devices */
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ROMSTAGE_CONST struct device * ROMSTAGE_CONST all_devices = &dev_root;
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/**
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* Given a PCI bus and a devfn number, find the device structure.
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*
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* @param bus The bus number.
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* @param devfn A device/function number.
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* @return Pointer to the device structure (if found), 0 otherwise.
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*/
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ROMSTAGE_CONST struct device *dev_find_slot(unsigned int bus,
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unsigned int devfn)
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{
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ROMSTAGE_CONST struct device *dev, *result;
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result = 0;
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for (dev = all_devices; dev; dev = dev->next) {
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if ((dev->path.type == DEVICE_PATH_PCI) &&
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(dev->bus->secondary == bus) &&
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(dev->path.pci.devfn == devfn)) {
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result = dev;
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break;
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}
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}
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return result;
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}
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/**
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* Given a device pointer, find the next PCI device.
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*
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* @param previous_dev A pointer to a PCI device structure.
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* @return Pointer to the next device structure (if found), 0 otherwise.
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*/
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ROMSTAGE_CONST struct device *dev_find_next_pci_device(
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ROMSTAGE_CONST struct device *previous_dev)
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{
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ROMSTAGE_CONST struct device *dev, *result;
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if (previous_dev == NULL)
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previous_dev = all_devices;
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result = 0;
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for (dev = previous_dev->next; dev; dev = dev->next) {
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if (dev->path.type == DEVICE_PATH_PCI) {
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result = dev;
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break;
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}
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}
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return result;
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}
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/**
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* Given an SMBus bus and a device number, find the device structure.
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*
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* @param bus The bus number.
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* @param addr A device number.
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* @return Pointer to the device structure (if found), 0 otherwise.
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*/
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ROMSTAGE_CONST struct device *dev_find_slot_on_smbus(unsigned int bus,
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unsigned int addr)
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{
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ROMSTAGE_CONST struct device *dev, *result;
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result = 0;
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for (dev = all_devices; dev; dev = dev->next) {
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if ((dev->path.type == DEVICE_PATH_I2C) &&
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(dev->bus->secondary == bus) &&
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(dev->path.i2c.device == addr)) {
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result = dev;
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break;
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}
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}
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return result;
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}
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/**
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* Given a PnP port and a device number, find the device structure.
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*
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* @param port The I/O port.
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* @param device Logical device number.
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* @return Pointer to the device structure (if found), 0 otherwise.
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*/
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ROMSTAGE_CONST struct device *dev_find_slot_pnp(u16 port, u16 device)
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{
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ROMSTAGE_CONST struct device *dev;
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for (dev = all_devices; dev; dev = dev->next) {
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if ((dev->path.type == DEVICE_PATH_PNP) &&
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(dev->path.pnp.port == port) &&
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(dev->path.pnp.device == device)) {
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return dev;
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}
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}
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return 0;
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}
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