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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2018 Patrick Rudolph <patrick.rudolph@9elements.com>
*
* 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 <stdint.h>
#include <arch/acpi.h>
#include <arch/io.h>
#include <device/device.h>
#include <device/pci.h>
#include <assert.h>
#include <security/vboot/vboot_common.h>
#include "pmbase.h"
#include "pmutil.h"
/* LPC PM Base Address Register */
#define PMBASE 0x40
#define PMSIZE 0x80
/* PCI Configuration Space (D31:F0): LPC */
#if defined(__SIMPLE_DEVICE__)
#define PCH_LPC_DEV PCI_DEV(0, 0x1f, 0)
#else
#define PCH_LPC_DEV pcidev_on_root(0x1f, 0)
#endif
u16 lpc_get_pmbase(void)
{
#if defined(__SMM__)
/* Don't assume PMBASE is still the same */
return pci_read_config16(PCH_LPC_DEV, PMBASE) & 0xfffc;
#else
static u16 pmbase;
if (pmbase)
return pmbase;
pmbase = pci_read_config16(PCH_LPC_DEV, PMBASE) & 0xfffc;
return pmbase;
#endif
}
void write_pmbase32(const u8 addr, const u32 val)
{
ASSERT(addr <= (PMSIZE - sizeof(u32)));
outl(val, lpc_get_pmbase() + addr);
}
void write_pmbase16(const u8 addr, const u16 val)
{
ASSERT(addr <= (PMSIZE - sizeof(u16)));
outw(val, lpc_get_pmbase() + addr);
}
void write_pmbase8(const u8 addr, const u8 val)
{
ASSERT(addr <= (PMSIZE - sizeof(u8)));
outb(val, lpc_get_pmbase() + addr);
}
u32 read_pmbase32(const u8 addr)
{
ASSERT(addr <= (PMSIZE - sizeof(u32)));
return inl(lpc_get_pmbase() + addr);
}
u16 read_pmbase16(const u8 addr)
{
ASSERT(addr <= (PMSIZE - sizeof(u16)));
return inw(lpc_get_pmbase() + addr);
}
u8 read_pmbase8(const u8 addr)
{
ASSERT(addr <= (PMSIZE - sizeof(u8)));
return inb(lpc_get_pmbase() + addr);
}
int vboot_platform_is_resuming(void)
{
u16 reg16 = read_pmbase16(PM1_STS);
if (!(reg16 & WAK_STS))
return 0;
return acpi_sleep_from_pm1(reg16) == ACPI_S3;
}
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