u-boot/arch/x86/cpu/broadwell/sdram.c

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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2016 Google, Inc
*
* From coreboot src/soc/intel/broadwell/romstage/raminit.c
*/
#include <common.h>
#include <dm.h>
#include <pci.h>
#include <syscon.h>
#include <asm/cpu.h>
#include <asm/io.h>
#include <asm/lpc_common.h>
#include <asm/mrccache.h>
#include <asm/mrc_common.h>
#include <asm/mtrr.h>
#include <asm/pci.h>
#include <asm/arch/iomap.h>
#include <asm/arch/me.h>
#include <asm/arch/pch.h>
#include <asm/arch/pei_data.h>
#include <asm/arch/pm.h>
ulong board_get_usable_ram_top(ulong total_size)
{
return mrc_common_board_get_usable_ram_top(total_size);
}
int dram_init_banksize(void)
{
mrc_common_dram_init_banksize();
return 0;
}
void broadwell_fill_pei_data(struct pei_data *pei_data)
{
pei_data->pei_version = PEI_VERSION;
pei_data->board_type = BOARD_TYPE_ULT;
pei_data->pciexbar = MCFG_BASE_ADDRESS;
pei_data->smbusbar = SMBUS_BASE_ADDRESS;
pei_data->ehcibar = EARLY_EHCI_BAR;
pei_data->xhcibar = EARLY_XHCI_BAR;
pei_data->gttbar = EARLY_GTT_BAR;
pei_data->pmbase = ACPI_BASE_ADDRESS;
pei_data->gpiobase = GPIO_BASE_ADDRESS;
pei_data->tseg_size = CONFIG_SMM_TSEG_SIZE;
pei_data->temp_mmio_base = EARLY_TEMP_MMIO;
pei_data->tx_byte = sdram_console_tx_byte;
pei_data->ddr_refresh_2x = 1;
}
static inline void pei_data_usb2_port(struct pei_data *pei_data, int port,
uint16_t length, uint8_t enable,
uint8_t oc_pin, uint8_t location)
{
pei_data->usb2_ports[port].length = length;
pei_data->usb2_ports[port].enable = enable;
pei_data->usb2_ports[port].oc_pin = oc_pin;
pei_data->usb2_ports[port].location = location;
}
static inline void pei_data_usb3_port(struct pei_data *pei_data, int port,
uint8_t enable, uint8_t oc_pin,
uint8_t fixed_eq)
{
pei_data->usb3_ports[port].enable = enable;
pei_data->usb3_ports[port].oc_pin = oc_pin;
pei_data->usb3_ports[port].fixed_eq = fixed_eq;
}
void mainboard_fill_pei_data(struct pei_data *pei_data)
{
/* DQ byte map for Samus board */
const u8 dq_map[2][6][2] = {
{ { 0x0F, 0xF0 }, { 0x00, 0xF0 }, { 0x0F, 0xF0 },
{ 0x0F, 0x00 }, { 0xFF, 0x00 }, { 0xFF, 0x00 } },
{ { 0x0F, 0xF0 }, { 0x00, 0xF0 }, { 0x0F, 0xF0 },
{ 0x0F, 0x00 }, { 0xFF, 0x00 }, { 0xFF, 0x00 } } };
/* DQS CPU<>DRAM map for Samus board */
const u8 dqs_map[2][8] = {
{ 2, 0, 1, 3, 6, 4, 7, 5 },
{ 2, 1, 0, 3, 6, 5, 4, 7 } };
pei_data->ec_present = 1;
/* One installed DIMM per channel */
pei_data->dimm_channel0_disabled = 2;
pei_data->dimm_channel1_disabled = 2;
memcpy(pei_data->dq_map, dq_map, sizeof(dq_map));
memcpy(pei_data->dqs_map, dqs_map, sizeof(dqs_map));
/* P0: HOST PORT */
pei_data_usb2_port(pei_data, 0, 0x0080, 1, 0,
USB_PORT_BACK_PANEL);
/* P1: HOST PORT */
pei_data_usb2_port(pei_data, 1, 0x0080, 1, 1,
USB_PORT_BACK_PANEL);
/* P2: RAIDEN */
pei_data_usb2_port(pei_data, 2, 0x0080, 1, USB_OC_PIN_SKIP,
USB_PORT_BACK_PANEL);
/* P3: SD CARD */
pei_data_usb2_port(pei_data, 3, 0x0040, 1, USB_OC_PIN_SKIP,
USB_PORT_INTERNAL);
/* P4: RAIDEN */
pei_data_usb2_port(pei_data, 4, 0x0080, 1, USB_OC_PIN_SKIP,
USB_PORT_BACK_PANEL);
/* P5: WWAN (Disabled) */
pei_data_usb2_port(pei_data, 5, 0x0000, 0, USB_OC_PIN_SKIP,
USB_PORT_SKIP);
/* P6: CAMERA */
pei_data_usb2_port(pei_data, 6, 0x0040, 1, USB_OC_PIN_SKIP,
USB_PORT_INTERNAL);
/* P7: BT */
pei_data_usb2_port(pei_data, 7, 0x0040, 1, USB_OC_PIN_SKIP,
USB_PORT_INTERNAL);
/* P1: HOST PORT */
pei_data_usb3_port(pei_data, 0, 1, 0, 0);
/* P2: HOST PORT */
pei_data_usb3_port(pei_data, 1, 1, 1, 0);
/* P3: RAIDEN */
pei_data_usb3_port(pei_data, 2, 1, USB_OC_PIN_SKIP, 0);
/* P4: RAIDEN */
pei_data_usb3_port(pei_data, 3, 1, USB_OC_PIN_SKIP, 0);
}
static unsigned long get_top_of_ram(struct udevice *dev)
{
/*
* Base of DPR is top of usable DRAM below 4GiB. The register has
* 1 MiB alignment and reports the TOP of the range, the base
* must be calculated from the size in MiB in bits 11:4.
*/
u32 dpr, tom;
dm_pci_read_config32(dev, DPR, &dpr);
tom = dpr & ~((1 << 20) - 1);
debug("dpt %08x tom %08x\n", dpr, tom);
/* Subtract DMA Protected Range size if enabled */
if (dpr & DPR_EPM)
tom -= (dpr & DPR_SIZE_MASK) << 16;
return (unsigned long)tom;
}
/**
* sdram_find() - Find available memory
*
* This is a bit complicated since on x86 there are system memory holes all
* over the place. We create a list of available memory blocks
*
* @dev: Northbridge device
*/
static int sdram_find(struct udevice *dev)
{
struct memory_info *info = &gd->arch.meminfo;
ulong top_of_ram;
top_of_ram = get_top_of_ram(dev);
mrc_add_memory_area(info, 0, top_of_ram);
/* Add MTRRs for memory */
mtrr_add_request(MTRR_TYPE_WRBACK, 0, 2ULL << 30);
return 0;
}
static int prepare_mrc_cache(struct pei_data *pei_data)
{
struct mrc_data_container *mrc_cache;
struct mrc_region entry;
int ret;
ret = mrccache_get_region(NULL, &entry);
if (ret)
return ret;
mrc_cache = mrccache_find_current(&entry);
if (!mrc_cache)
return -ENOENT;
pei_data->saved_data = mrc_cache->data;
pei_data->saved_data_size = mrc_cache->data_size;
debug("%s: at %p, size %x checksum %04x\n", __func__,
pei_data->saved_data, pei_data->saved_data_size,
mrc_cache->checksum);
return 0;
}
int dram_init(void)
{
struct pei_data _pei_data __aligned(8);
struct pei_data *pei_data = &_pei_data;
struct udevice *dev, *me_dev, *pch_dev;
struct chipset_power_state ps;
const void *spd_data;
int ret, size;
memset(pei_data, '\0', sizeof(struct pei_data));
/* Print ME state before MRC */
ret = syscon_get_by_driver_data(X86_SYSCON_ME, &me_dev);
if (ret)
return ret;
intel_me_status(me_dev);
/* Save ME HSIO version */
ret = uclass_first_device(UCLASS_PCH, &pch_dev);
if (ret)
return ret;
if (!pch_dev)
return -ENODEV;
power_state_get(pch_dev, &ps);
intel_me_hsio_version(me_dev, &ps.hsio_version, &ps.hsio_checksum);
broadwell_fill_pei_data(pei_data);
mainboard_fill_pei_data(pei_data);
ret = uclass_first_device(UCLASS_NORTHBRIDGE, &dev);
if (ret)
return ret;
if (!dev)
return -ENODEV;
size = 256;
ret = mrc_locate_spd(dev, size, &spd_data);
if (ret)
return ret;
memcpy(pei_data->spd_data[0][0], spd_data, size);
memcpy(pei_data->spd_data[1][0], spd_data, size);
ret = prepare_mrc_cache(pei_data);
if (ret)
debug("prepare_mrc_cache failed: %d\n", ret);
debug("PEI version %#x\n", pei_data->pei_version);
ret = mrc_common_init(dev, pei_data, true);
if (ret)
return ret;
debug("Memory init done\n");
ret = sdram_find(dev);
if (ret)
return ret;
gd->ram_size = gd->arch.meminfo.total_32bit_memory;
debug("RAM size %llx\n", (unsigned long long)gd->ram_size);
debug("MRC output data length %#x at %p\n", pei_data->data_to_save_size,
pei_data->data_to_save);
/* S3 resume: don't save scrambler seed or MRC data */
if (pei_data->boot_mode != SLEEP_STATE_S3) {
/*
* This will be copied to SDRAM in reserve_arch(), then written
* to SPI flash in mrccache_save()
*/
gd->arch.mrc_output = (char *)pei_data->data_to_save;
gd->arch.mrc_output_len = pei_data->data_to_save_size;
}
gd->arch.pei_meminfo = pei_data->meminfo;
return 0;
}
/* Use this hook to save our SDRAM parameters */
int misc_init_r(void)
{
int ret;
ret = mrccache_save();
if (ret)
printf("Unable to save MRC data: %d\n", ret);
else
debug("Saved MRC cache data\n");
return 0;
}
void board_debug_uart_init(void)
{
struct udevice *bus = NULL;
/* com1 / com2 decode range */
pci_x86_write_config(bus, PCH_DEV_LPC, LPC_IO_DEC, 1 << 4, PCI_SIZE_16);
pci_x86_write_config(bus, PCH_DEV_LPC, LPC_EN, COMA_LPC_EN,
PCI_SIZE_16);
}
static const struct udevice_id broadwell_syscon_ids[] = {
{ .compatible = "intel,me", .data = X86_SYSCON_ME },
{ }
};
U_BOOT_DRIVER(syscon_intel_me) = {
.name = "intel_me_syscon",
.id = UCLASS_SYSCON,
.of_match = broadwell_syscon_ids,
};