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u-boot-brain/arch/x86/cpu/ivybridge/sdram.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

558 lines
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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2011 The Chromium OS Authors.
* (C) Copyright 2010,2011
* Graeme Russ, <graeme.russ@gmail.com>
*
* Portions from Coreboot mainboard/google/link/romstage.c
* Copyright (C) 2007-2010 coresystems GmbH
* Copyright (C) 2011 Google Inc.
*/
#include <common.h>
#include <errno.h>
#include <fdtdec.h>
#include <malloc.h>
#include <net.h>
#include <rtc.h>
#include <spi.h>
#include <spi_flash.h>
#include <syscon.h>
#include <asm/cpu.h>
#include <asm/processor.h>
#include <asm/gpio.h>
#include <asm/global_data.h>
#include <asm/intel_regs.h>
#include <asm/mrccache.h>
#include <asm/mrc_common.h>
#include <asm/mtrr.h>
#include <asm/pci.h>
#include <asm/report_platform.h>
#include <asm/arch/me.h>
#include <asm/arch/pei_data.h>
#include <asm/arch/pch.h>
#include <asm/post.h>
#include <asm/arch/sandybridge.h>
DECLARE_GLOBAL_DATA_PTR;
#define CMOS_OFFSET_MRC_SEED 152
#define CMOS_OFFSET_MRC_SEED_S3 156
#define CMOS_OFFSET_MRC_SEED_CHK 160
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;
}
static int read_seed_from_cmos(struct pei_data *pei_data)
{
u16 c1, c2, checksum, seed_checksum;
struct udevice *dev;
int ret = 0;
ret = uclass_get_device(UCLASS_RTC, 0, &dev);
if (ret) {
debug("Cannot find RTC: err=%d\n", ret);
return -ENODEV;
}
/*
* Read scrambler seeds from CMOS RAM. We don't want to store them in
* SPI flash since they change on every boot and that would wear down
* the flash too much. So we store these in CMOS and the large MRC
* data in SPI flash.
*/
ret = rtc_read32(dev, CMOS_OFFSET_MRC_SEED, &pei_data->scrambler_seed);
if (!ret) {
ret = rtc_read32(dev, CMOS_OFFSET_MRC_SEED_S3,
&pei_data->scrambler_seed_s3);
}
if (ret) {
debug("Failed to read from RTC %s\n", dev->name);
return ret;
}
debug("Read scrambler seed 0x%08x from CMOS 0x%02x\n",
pei_data->scrambler_seed, CMOS_OFFSET_MRC_SEED);
debug("Read S3 scrambler seed 0x%08x from CMOS 0x%02x\n",
pei_data->scrambler_seed_s3, CMOS_OFFSET_MRC_SEED_S3);
/* Compute seed checksum and compare */
c1 = compute_ip_checksum((u8 *)&pei_data->scrambler_seed,
sizeof(u32));
c2 = compute_ip_checksum((u8 *)&pei_data->scrambler_seed_s3,
sizeof(u32));
checksum = add_ip_checksums(sizeof(u32), c1, c2);
seed_checksum = rtc_read8(dev, CMOS_OFFSET_MRC_SEED_CHK);
seed_checksum |= rtc_read8(dev, CMOS_OFFSET_MRC_SEED_CHK + 1) << 8;
if (checksum != seed_checksum) {
debug("%s: invalid seed checksum\n", __func__);
pei_data->scrambler_seed = 0;
pei_data->scrambler_seed_s3 = 0;
return -EINVAL;
}
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 = read_seed_from_cmos(pei_data);
if (ret)
return ret;
ret = mrccache_get_region(NULL, &entry);
if (ret)
return ret;
mrc_cache = mrccache_find_current(&entry);
if (!mrc_cache)
return -ENOENT;
pei_data->mrc_input = mrc_cache->data;
pei_data->mrc_input_len = mrc_cache->data_size;
debug("%s: at %p, size %x checksum %04x\n", __func__,
pei_data->mrc_input, pei_data->mrc_input_len,
mrc_cache->checksum);
return 0;
}
static int write_seeds_to_cmos(struct pei_data *pei_data)
{
u16 c1, c2, checksum;
struct udevice *dev;
int ret = 0;
ret = uclass_get_device(UCLASS_RTC, 0, &dev);
if (ret) {
debug("Cannot find RTC: err=%d\n", ret);
return -ENODEV;
}
/* Save the MRC seed values to CMOS */
rtc_write32(dev, CMOS_OFFSET_MRC_SEED, pei_data->scrambler_seed);
debug("Save scrambler seed 0x%08x to CMOS 0x%02x\n",
pei_data->scrambler_seed, CMOS_OFFSET_MRC_SEED);
rtc_write32(dev, CMOS_OFFSET_MRC_SEED_S3, pei_data->scrambler_seed_s3);
debug("Save s3 scrambler seed 0x%08x to CMOS 0x%02x\n",
pei_data->scrambler_seed_s3, CMOS_OFFSET_MRC_SEED_S3);
/* Save a simple checksum of the seed values */
c1 = compute_ip_checksum((u8 *)&pei_data->scrambler_seed,
sizeof(u32));
c2 = compute_ip_checksum((u8 *)&pei_data->scrambler_seed_s3,
sizeof(u32));
checksum = add_ip_checksums(sizeof(u32), c1, c2);
rtc_write8(dev, CMOS_OFFSET_MRC_SEED_CHK, checksum & 0xff);
rtc_write8(dev, CMOS_OFFSET_MRC_SEED_CHK + 1, (checksum >> 8) & 0xff);
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);
return 0;
}
static void post_system_agent_init(struct udevice *dev, struct udevice *me_dev,
struct pei_data *pei_data)
{
uint16_t done;
/*
* Send ME init done for SandyBridge here. This is done inside the
* SystemAgent binary on IvyBridge
*/
dm_pci_read_config16(dev, PCI_DEVICE_ID, &done);
done &= BASE_REV_MASK;
if (BASE_REV_SNB == done)
intel_early_me_init_done(dev, me_dev, ME_INIT_STATUS_SUCCESS);
else
intel_me_status(me_dev);
/* If PCIe init is skipped, set the PEG clock gating */
if (!pei_data->pcie_init)
setbits_le32(MCHBAR_REG(0x7010), 1);
}
static int recovery_mode_enabled(void)
{
return false;
}
static int copy_spd(struct udevice *dev, struct pei_data *peid)
{
const void *data;
int ret;
ret = mrc_locate_spd(dev, sizeof(peid->spd_data[0]), &data);
if (ret) {
debug("%s: Could not locate SPD (ret=%d)\n", __func__, ret);
return ret;
}
memcpy(peid->spd_data[0], data, sizeof(peid->spd_data[0]));
return 0;
}
/**
* 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;
uint32_t tseg_base, uma_size, tolud;
uint64_t tom, me_base, touud;
uint64_t uma_memory_base = 0;
unsigned long long tomk;
uint16_t ggc;
u32 val;
/* Total Memory 2GB example:
*
* 00000000 0000MB-1992MB 1992MB RAM (writeback)
* 7c800000 1992MB-2000MB 8MB TSEG (SMRR)
* 7d000000 2000MB-2002MB 2MB GFX GTT (uncached)
* 7d200000 2002MB-2034MB 32MB GFX UMA (uncached)
* 7f200000 2034MB TOLUD
* 7f800000 2040MB MEBASE
* 7f800000 2040MB-2048MB 8MB ME UMA (uncached)
* 80000000 2048MB TOM
* 100000000 4096MB-4102MB 6MB RAM (writeback)
*
* Total Memory 4GB example:
*
* 00000000 0000MB-2768MB 2768MB RAM (writeback)
* ad000000 2768MB-2776MB 8MB TSEG (SMRR)
* ad800000 2776MB-2778MB 2MB GFX GTT (uncached)
* ada00000 2778MB-2810MB 32MB GFX UMA (uncached)
* afa00000 2810MB TOLUD
* ff800000 4088MB MEBASE
* ff800000 4088MB-4096MB 8MB ME UMA (uncached)
* 100000000 4096MB TOM
* 100000000 4096MB-5374MB 1278MB RAM (writeback)
* 14fe00000 5368MB TOUUD
*/
/* Top of Upper Usable DRAM, including remap */
dm_pci_read_config32(dev, TOUUD + 4, &val);
touud = (uint64_t)val << 32;
dm_pci_read_config32(dev, TOUUD, &val);
touud |= val;
/* Top of Lower Usable DRAM */
dm_pci_read_config32(dev, TOLUD, &tolud);
/* Top of Memory - does not account for any UMA */
dm_pci_read_config32(dev, 0xa4, &val);
tom = (uint64_t)val << 32;
dm_pci_read_config32(dev, 0xa0, &val);
tom |= val;
debug("TOUUD %llx TOLUD %08x TOM %llx\n", touud, tolud, tom);
/* ME UMA needs excluding if total memory <4GB */
dm_pci_read_config32(dev, 0x74, &val);
me_base = (uint64_t)val << 32;
dm_pci_read_config32(dev, 0x70, &val);
me_base |= val;
debug("MEBASE %llx\n", me_base);
/* TODO: Get rid of all this shifting by 10 bits */
tomk = tolud >> 10;
if (me_base == tolud) {
/* ME is from MEBASE-TOM */
uma_size = (tom - me_base) >> 10;
/* Increment TOLUD to account for ME as RAM */
tolud += uma_size << 10;
/* UMA starts at old TOLUD */
uma_memory_base = tomk * 1024ULL;
debug("ME UMA base %llx size %uM\n", me_base, uma_size >> 10);
}
/* Graphics memory comes next */
dm_pci_read_config16(dev, GGC, &ggc);
if (!(ggc & 2)) {
debug("IGD decoded, subtracting ");
/* Graphics memory */
uma_size = ((ggc >> 3) & 0x1f) * 32 * 1024ULL;
debug("%uM UMA", uma_size >> 10);
tomk -= uma_size;
uma_memory_base = tomk * 1024ULL;
/* GTT Graphics Stolen Memory Size (GGMS) */
uma_size = ((ggc >> 8) & 0x3) * 1024ULL;
tomk -= uma_size;
uma_memory_base = tomk * 1024ULL;
debug(" and %uM GTT\n", uma_size >> 10);
}
/* Calculate TSEG size from its base which must be below GTT */
dm_pci_read_config32(dev, 0xb8, &tseg_base);
uma_size = (uma_memory_base - tseg_base) >> 10;
tomk -= uma_size;
uma_memory_base = tomk * 1024ULL;
debug("TSEG base 0x%08x size %uM\n", tseg_base, uma_size >> 10);
debug("Available memory below 4GB: %lluM\n", tomk >> 10);
/* Report the memory regions */
mrc_add_memory_area(info, 1 << 20, 2 << 28);
mrc_add_memory_area(info, (2 << 28) + (2 << 20), 4 << 28);
mrc_add_memory_area(info, (4 << 28) + (2 << 20), tseg_base);
mrc_add_memory_area(info, 1ULL << 32, touud);
/* Add MTRRs for memory */
mtrr_add_request(MTRR_TYPE_WRBACK, 0, 2ULL << 30);
mtrr_add_request(MTRR_TYPE_WRBACK, 2ULL << 30, 512 << 20);
mtrr_add_request(MTRR_TYPE_WRBACK, 0xaULL << 28, 256 << 20);
mtrr_add_request(MTRR_TYPE_UNCACHEABLE, tseg_base, 16 << 20);
mtrr_add_request(MTRR_TYPE_UNCACHEABLE, tseg_base + (16 << 20),
32 << 20);
/*
* If >= 4GB installed then memory from TOLUD to 4GB
* is remapped above TOM, TOUUD will account for both
*/
if (touud > (1ULL << 32ULL)) {
debug("Available memory above 4GB: %lluM\n",
(touud >> 20) - 4096);
}
return 0;
}
static void rcba_config(void)
{
/*
* GFX INTA -> PIRQA (MSI)
* D28IP_P3IP WLAN INTA -> PIRQB
* D29IP_E1P EHCI1 INTA -> PIRQD
* D26IP_E2P EHCI2 INTA -> PIRQF
* D31IP_SIP SATA INTA -> PIRQF (MSI)
* D31IP_SMIP SMBUS INTB -> PIRQH
* D31IP_TTIP THRT INTC -> PIRQA
* D27IP_ZIP HDA INTA -> PIRQA (MSI)
*
* TRACKPAD -> PIRQE (Edge Triggered)
* TOUCHSCREEN -> PIRQG (Edge Triggered)
*/
/* Device interrupt pin register (board specific) */
writel((INTC << D31IP_TTIP) | (NOINT << D31IP_SIP2) |
(INTB << D31IP_SMIP) | (INTA << D31IP_SIP), RCB_REG(D31IP));
writel(NOINT << D30IP_PIP, RCB_REG(D30IP));
writel(INTA << D29IP_E1P, RCB_REG(D29IP));
writel(INTA << D28IP_P3IP, RCB_REG(D28IP));
writel(INTA << D27IP_ZIP, RCB_REG(D27IP));
writel(INTA << D26IP_E2P, RCB_REG(D26IP));
writel(NOINT << D25IP_LIP, RCB_REG(D25IP));
writel(NOINT << D22IP_MEI1IP, RCB_REG(D22IP));
/* Device interrupt route registers */
writel(DIR_ROUTE(PIRQB, PIRQH, PIRQA, PIRQC), RCB_REG(D31IR));
writel(DIR_ROUTE(PIRQD, PIRQE, PIRQF, PIRQG), RCB_REG(D29IR));
writel(DIR_ROUTE(PIRQB, PIRQC, PIRQD, PIRQE), RCB_REG(D28IR));
writel(DIR_ROUTE(PIRQA, PIRQH, PIRQA, PIRQB), RCB_REG(D27IR));
writel(DIR_ROUTE(PIRQF, PIRQE, PIRQG, PIRQH), RCB_REG(D26IR));
writel(DIR_ROUTE(PIRQA, PIRQB, PIRQC, PIRQD), RCB_REG(D25IR));
writel(DIR_ROUTE(PIRQA, PIRQB, PIRQC, PIRQD), RCB_REG(D22IR));
/* Enable IOAPIC (generic) */
writew(0x0100, RCB_REG(OIC));
/* PCH BWG says to read back the IOAPIC enable register */
(void)readw(RCB_REG(OIC));
/* Disable unused devices (board specific) */
setbits_le32(RCB_REG(FD), PCH_DISABLE_ALWAYS);
}
int dram_init(void)
{
struct pei_data _pei_data __aligned(8) = {
.pei_version = PEI_VERSION,
.mchbar = MCH_BASE_ADDRESS,
.dmibar = DEFAULT_DMIBAR,
.epbar = DEFAULT_EPBAR,
.pciexbar = CONFIG_PCIE_ECAM_BASE,
.smbusbar = SMBUS_IO_BASE,
.wdbbar = 0x4000000,
.wdbsize = 0x1000,
.hpet_address = CONFIG_HPET_ADDRESS,
.rcba = DEFAULT_RCBABASE,
.pmbase = DEFAULT_PMBASE,
.gpiobase = DEFAULT_GPIOBASE,
.thermalbase = 0xfed08000,
.system_type = 0, /* 0 Mobile, 1 Desktop/Server */
.tseg_size = CONFIG_SMM_TSEG_SIZE,
.ts_addresses = { 0x00, 0x00, 0x00, 0x00 },
.ec_present = 1,
.ddr3lv_support = 1,
/*
* 0 = leave channel enabled
* 1 = disable dimm 0 on channel
* 2 = disable dimm 1 on channel
* 3 = disable dimm 0+1 on channel
*/
.dimm_channel0_disabled = 2,
.dimm_channel1_disabled = 2,
.max_ddr3_freq = 1600,
.usb_port_config = {
/*
* Empty and onboard Ports 0-7, set to un-used pin
* OC3
*/
{ 0, 3, 0x0000 }, /* P0= Empty */
{ 1, 0, 0x0040 }, /* P1= Left USB 1 (OC0) */
{ 1, 1, 0x0040 }, /* P2= Left USB 2 (OC1) */
{ 1, 3, 0x0040 }, /* P3= SDCARD (no OC) */
{ 0, 3, 0x0000 }, /* P4= Empty */
{ 1, 3, 0x0040 }, /* P5= WWAN (no OC) */
{ 0, 3, 0x0000 }, /* P6= Empty */
{ 0, 3, 0x0000 }, /* P7= Empty */
/*
* Empty and onboard Ports 8-13, set to un-used pin
* OC4
*/
{ 1, 4, 0x0040 }, /* P8= Camera (no OC) */
{ 1, 4, 0x0040 }, /* P9= Bluetooth (no OC) */
{ 0, 4, 0x0000 }, /* P10= Empty */
{ 0, 4, 0x0000 }, /* P11= Empty */
{ 0, 4, 0x0000 }, /* P12= Empty */
{ 0, 4, 0x0000 }, /* P13= Empty */
},
};
struct pei_data *pei_data = &_pei_data;
struct udevice *dev, *me_dev;
int ret;
/* We need the pinctrl set up early */
ret = syscon_get_by_driver_data(X86_SYSCON_PINCONF, &dev);
if (ret) {
debug("%s: Could not get pinconf (ret=%d)\n", __func__, ret);
return ret;
}
ret = uclass_first_device_err(UCLASS_NORTHBRIDGE, &dev);
if (ret) {
debug("%s: Could not get northbridge (ret=%d)\n", __func__,
ret);
return ret;
}
ret = syscon_get_by_driver_data(X86_SYSCON_ME, &me_dev);
if (ret) {
debug("%s: Could not get ME (ret=%d)\n", __func__, ret);
return ret;
}
ret = copy_spd(dev, pei_data);
if (ret) {
debug("%s: Could not get SPD (ret=%d)\n", __func__, ret);
return ret;
}
pei_data->boot_mode = gd->arch.pei_boot_mode;
debug("Boot mode %d\n", gd->arch.pei_boot_mode);
debug("mrc_input %p\n", pei_data->mrc_input);
/*
* Do not pass MRC data in for recovery mode boot,
* Always pass it in for S3 resume.
*/
if (!recovery_mode_enabled() ||
pei_data->boot_mode == PEI_BOOT_RESUME) {
ret = prepare_mrc_cache(pei_data);
if (ret)
debug("prepare_mrc_cache failed: %d\n", ret);
}
/* If MRC data is not found we cannot continue S3 resume. */
if (pei_data->boot_mode == PEI_BOOT_RESUME && !pei_data->mrc_input) {
debug("Giving up in sdram_initialize: No MRC data\n");
reset_cpu(0);
}
/* Pass console handler in pei_data */
pei_data->tx_byte = sdram_console_tx_byte;
/* Wait for ME to be ready */
ret = intel_early_me_init(me_dev);
if (ret) {
debug("%s: Could not init ME (ret=%d)\n", __func__, ret);
return ret;
}
ret = intel_early_me_uma_size(me_dev);
if (ret < 0) {
debug("%s: Could not get UMA size (ret=%d)\n", __func__, ret);
return ret;
}
ret = mrc_common_init(dev, pei_data, false);
if (ret) {
debug("%s: mrc_common_init() failed (ret=%d)\n", __func__, ret);
return ret;
}
ret = sdram_find(dev);
if (ret) {
debug("%s: sdram_find() failed (ret=%d)\n", __func__, ret);
return ret;
}
gd->ram_size = gd->arch.meminfo.total_32bit_memory;
debug("MRC output data length %#x at %p\n", pei_data->mrc_output_len,
pei_data->mrc_output);
post_system_agent_init(dev, me_dev, pei_data);
report_memory_config();
/* S3 resume: don't save scrambler seed or MRC data */
if (pei_data->boot_mode != PEI_BOOT_RESUME) {
/*
* This will be copied to SDRAM in reserve_arch(), then written
* to SPI flash in mrccache_save()
*/
gd->arch.mrc_output = (char *)pei_data->mrc_output;
gd->arch.mrc_output_len = pei_data->mrc_output_len;
ret = write_seeds_to_cmos(pei_data);
if (ret)
debug("Failed to write seeds to CMOS: %d\n", ret);
}
writew(0xCAFE, MCHBAR_REG(SSKPD));
if (ret)
return ret;
rcba_config();
return 0;
}
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