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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2017 Intel Corporation.
*
* 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 <arch/io.h>
#include <delay.h>
#include <device/device.h>
#include <device/pci.h>
#include <intelblocks/systemagent.h>
#include <soc/iomap.h>
#include <soc/pci_devs.h>
#include <soc/systemagent.h>
#include "systemagent_def.h"
#include <timer.h>
#if !ENV_RAMSTAGE
void bootblock_systemagent_early_init(void)
{
uint32_t reg;
uint8_t pciexbar_length;
/*
* The PCIEXBAR is assumed to live in the memory mapped IO space under
* 4GiB.
*/
reg = 0;
pci_io_write_config32(SA_DEV_ROOT, PCIEXBAR + 4, reg);
/* Get PCI Express Region Length */
switch (CONFIG_SA_PCIEX_LENGTH) {
case 256 * MiB:
pciexbar_length = PCIEXBAR_LENGTH_256MB;
break;
case 128 * MiB:
pciexbar_length = PCIEXBAR_LENGTH_128MB;
break;
case 64 * MiB:
pciexbar_length = PCIEXBAR_LENGTH_64MB;
break;
default:
pciexbar_length = PCIEXBAR_LENGTH_256MB;
}
reg = CONFIG_MMCONF_BASE_ADDRESS | (pciexbar_length << 1)
| PCIEXBAR_PCIEXBAREN;
pci_io_write_config32(SA_DEV_ROOT, PCIEXBAR, reg);
/*
* TSEG defines the base of SMM range. BIOS determines the base
* of TSEG memory which must be at or below Graphics base of GTT
* Stolen memory, hence its better to clear TSEG register early
* to avoid power on default non-zero value (if any).
*/
pci_write_config32(SA_DEV_ROOT, TSEG, 0);
}
#endif
void sa_set_pci_bar(const struct sa_mmio_descriptor *fixed_set_resources,
size_t count)
{
int i;
for (i = 0; i < count; i++) {
uintptr_t base;
unsigned int index;
index = fixed_set_resources[i].index;
/* Check if PCI BAR already enabled */
base = pci_read_config32(SA_DEV_ROOT, index);
/* If enabled don't program it. */
if (base & 0x1)
return;
base = fixed_set_resources[i].base;
pci_write_config32(SA_DEV_ROOT, index, base | 1);
}
}
/*
* There are special BARs that actually are programmed in the MCHBAR. These
* Intel special features, but they do consume resources that need to be
* accounted for.
*/
void sa_set_mch_bar(const struct sa_mmio_descriptor *fixed_set_resources,
size_t count)
{
int i;
for (i = 0; i < count; i++) {
uintptr_t base;
unsigned int index;
base = fixed_set_resources[i].base;
index = fixed_set_resources[i].index;
write32((void *)(MCH_BASE_ADDRESS + index), base | 1);
}
}
void enable_pam_region(void)
{
/* All read and writes in this region are serviced by DRAM */
pci_write_config8(SA_DEV_ROOT, PAM0, 0x30);
pci_write_config8(SA_DEV_ROOT, PAM1, 0x33);
pci_write_config8(SA_DEV_ROOT, PAM2, 0x33);
pci_write_config8(SA_DEV_ROOT, PAM3, 0x33);
pci_write_config8(SA_DEV_ROOT, PAM4, 0x33);
pci_write_config8(SA_DEV_ROOT, PAM5, 0x33);
pci_write_config8(SA_DEV_ROOT, PAM6, 0x33);
}
void enable_bios_reset_cpl(void)
{
u8 bios_reset_cpl;
/*
* Set bits 0+1 of BIOS_RESET_CPL to indicate to the CPU
* that BIOS has initialized memory and power management
*/
bios_reset_cpl = MCHBAR8(BIOS_RESET_CPL);
bios_reset_cpl |= 3;
MCHBAR8(BIOS_RESET_CPL) = bios_reset_cpl;
}
uint32_t sa_get_tolud_base(void)
{
/* All regions concerned for have 1 MiB alignment. */
return ALIGN_DOWN(pci_read_config32(SA_DEV_ROOT, TOLUD), 1*MiB);
}
static uint16_t sa_get_ggc_reg(void)
{
return pci_read_config16(SA_DEV_ROOT, GGC);
}
size_t sa_get_dsm_size(void)
{
return (((sa_get_ggc_reg() & G_GMS_MASK) >> G_GMS_OFFSET) * 32*MiB);
}
size_t sa_get_gsm_size(void)
{
uint8_t ggms;
ggms = (sa_get_ggc_reg() & G_GGMS_MASK) >> G_GGMS_OFFSET;
/*
* Size of GSM: 0x0: No Preallocated Memory 0x1: 2MB Memory
* 0x2: 4MB Memory 0x3: 8MB Memory
*/
if (ggms)
return 1*MiB << ggms;
else
return 0;
}
/*
* Get DPR size in case CONFIG_SA_ENABLE_DPR is selected by SoC.
*/
size_t sa_get_dpr_size(void)
{
uintptr_t dpr_reg;
size_t size = 0;
/*
* DMA Protected Range can be reserved below TSEG for PCODE patch
* or TXT/BootGuard related data. Rather than report a base address
* the DPR register reports the TOP of the region, which is the same
* as TSEG base. The region size is reported in MiB in bits 11:4.
*/
dpr_reg = pci_read_config32(SA_DEV_ROOT, DPR);
if (dpr_reg & DPR_EPM)
size = (dpr_reg & DPR_SIZE_MASK) << 16;
return size;
}
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