sb/intel/common: Add functions to manipulate PMBASE

Add common functions to manipulate PMBASE IO window.

TODO:
* Use the new functions to manipulate register in PMBASE.
* Get rid of duplicated get_pmbase()

Change-Id: I3b454434ade560fb056b1fc0afe9541df93e14dd
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/27278
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Patrick Rudolph 2018-06-28 13:58:36 +02:00 committed by Patrick Rudolph
parent 7d7c631066
commit 853bb4dc11
3 changed files with 124 additions and 0 deletions

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@ -18,6 +18,11 @@ subdirs-y += firmware
ifeq ($(CONFIG_SOUTHBRIDGE_INTEL_COMMON),y) ifeq ($(CONFIG_SOUTHBRIDGE_INTEL_COMMON),y)
romstage-y += pmbase.c
ramstage-y += pmbase.c
postcar-y += pmbase.c
smm-y += pmbase.c
romstage-$(CONFIG_USBDEBUG_IN_ROMSTAGE) += usb_debug.c romstage-$(CONFIG_USBDEBUG_IN_ROMSTAGE) += usb_debug.c
ramstage-$(CONFIG_USBDEBUG) += usb_debug.c ramstage-$(CONFIG_USBDEBUG) += usb_debug.c

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@ -0,0 +1,93 @@
/*
* 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/io.h>
#include <device/device.h>
#include <device/pci.h>
#include <arch/early_variables.h>
#include <assert.h>
#include "pmbase.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 dev_find_slot(0, PCI_DEVFN(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 CAR_GLOBAL;
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);
}

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@ -0,0 +1,26 @@
/*
* 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>
u16 lpc_get_pmbase(void);
void write_pmbase32(const u8 addr, const u32 val);
void write_pmbase16(const u8 addr, const u16 val);
void write_pmbase8(const u8 addr, const u8 val);
u32 read_pmbase32(const u8 addr);
u16 read_pmbase16(const u8 addr);
u8 read_pmbase8(const u8 addr);