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