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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2018 Tristan Corrick <tristan@corrick.kiwi>
*
* 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, either version 2 of the License, or
* (at your option) any later version.
*
* 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 <console/console.h>
#include <device/device.h>
#include <device/pci_def.h>
#include <option.h>
#include <stdint.h>
#include <types.h>
/*
* Hiding the AST2400 might be desirable to reduce attack surface.
*
* The PCIe root port that the AST2400 is on is disabled, but the
* AST2400 itself likely remains in an enabled state.
*
* The AST2400 is also attached to the LPC. That interface does not get
* disabled.
*/
static void hide_ast2400(void)
{
struct device *dev = dev_find_slot(0, PCI_DEVFN(0x1c, 0));
if (!dev)
return;
/*
* Marking this device as disabled means that the southbridge code
* will properly disable the root port when it configures it later.
*/
dev->enabled = 0;
printk(BIOS_INFO, "The AST2400 is now set to be hidden.\n");
}
static void mainboard_enable(struct device *dev)
{
u8 hide = 0;
if (get_option(&hide, "hide_ast2400") == CB_SUCCESS && hide)
hide_ast2400();
}
struct chip_operations mainboard_ops = {
CHIP_NAME("X10SLM+-F")
.enable_dev = mainboard_enable,
};
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