diff options
author | Aaron Durbin <adurbin@chromium.org> | 2016-07-25 11:18:46 -0500 |
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committer | Aaron Durbin <adurbin@chromium.org> | 2016-07-27 00:40:05 +0200 |
commit | 40d93494c3dcfe7850aed056e1ad9c4b285c0f5b (patch) | |
tree | fa117904c80c5b917a3a3a059f0f380406c38a86 /src/device/device_simple.c | |
parent | 9cbc90a1f6e197258ed47bc44016640f2b1e5a31 (diff) | |
download | coreboot-40d93494c3dcfe7850aed056e1ad9c4b285c0f5b.tar.xz |
device: include devicetree in bootblock stage
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)
Diffstat (limited to 'src/device/device_simple.c')
-rw-r--r-- | src/device/device_simple.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/src/device/device_simple.c b/src/device/device_simple.c new file mode 100644 index 0000000000..828e99b75e --- /dev/null +++ b/src/device/device_simple.c @@ -0,0 +1,120 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2003-2004 Linux Networx + * (Written by Eric Biederman <ebiederman@lnxi.com> for Linux Networx) + * Copyright (C) 2003 Greg Watson <jarrah@users.sourceforge.net> + * Copyright (C) 2004 Li-Ta Lo <ollie@lanl.gov> + * Copyright (C) 2005-2006 Tyan + * (Written by Yinghai Lu <yhlu@tyan.com> for Tyan) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <device/device.h> +#include <device/path.h> +#include <device/pci.h> +#include <device/resource.h> + +/** Linked list of ALL devices */ +ROMSTAGE_CONST struct device * ROMSTAGE_CONST all_devices = &dev_root; + +/** + * Given a PCI bus and a devfn number, find the device structure. + * + * @param bus The bus number. + * @param devfn A device/function number. + * @return Pointer to the device structure (if found), 0 otherwise. + */ +ROMSTAGE_CONST struct device *dev_find_slot(unsigned int bus, + unsigned int devfn) +{ + ROMSTAGE_CONST struct device *dev, *result; + + result = 0; + for (dev = all_devices; dev; dev = dev->next) { + if ((dev->path.type == DEVICE_PATH_PCI) && + (dev->bus->secondary == bus) && + (dev->path.pci.devfn == devfn)) { + result = dev; + break; + } + } + return result; +} + +/** + * Given a device pointer, find the next PCI device. + * + * @param previous_dev A pointer to a PCI device structure. + * @return Pointer to the next device structure (if found), 0 otherwise. + */ +ROMSTAGE_CONST struct device *dev_find_next_pci_device( + ROMSTAGE_CONST struct device *previous_dev) +{ + ROMSTAGE_CONST struct device *dev, *result; + + if (previous_dev == NULL) + previous_dev = all_devices; + + result = 0; + for (dev = previous_dev->next; dev; dev = dev->next) { + if (dev->path.type == DEVICE_PATH_PCI) { + result = dev; + break; + } + } + return result; +} + +/** + * Given an SMBus bus and a device number, find the device structure. + * + * @param bus The bus number. + * @param addr A device number. + * @return Pointer to the device structure (if found), 0 otherwise. + */ +ROMSTAGE_CONST struct device *dev_find_slot_on_smbus(unsigned int bus, + unsigned int addr) +{ + ROMSTAGE_CONST struct device *dev, *result; + + result = 0; + for (dev = all_devices; dev; dev = dev->next) { + if ((dev->path.type == DEVICE_PATH_I2C) && + (dev->bus->secondary == bus) && + (dev->path.i2c.device == addr)) { + result = dev; + break; + } + } + return result; +} + +/** + * Given a PnP port and a device number, find the device structure. + * + * @param port The I/O port. + * @param device Logical device number. + * @return Pointer to the device structure (if found), 0 otherwise. + */ +ROMSTAGE_CONST struct device *dev_find_slot_pnp(u16 port, u16 device) +{ + ROMSTAGE_CONST struct device *dev; + + for (dev = all_devices; dev; dev = dev->next) { + if ((dev->path.type == DEVICE_PATH_PNP) && + (dev->path.pnp.port == port) && + (dev->path.pnp.device == device)) { + return dev; + } + } + return 0; +} |