#include <errno.h>
#include <fdtdec.h>
#include <malloc.h>
+#include <net.h>
+#include <rtc.h>
+#include <spi.h>
+#include <spi_flash.h>
#include <asm/processor.h>
#include <asm/gpio.h>
#include <asm/global_data.h>
+#include <asm/mrccache.h>
#include <asm/mtrr.h>
#include <asm/pci.h>
#include <asm/arch/me.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
+
/*
* This function looks for the highest region of memory lower than 4GB which
* has enough space for U-Boot where U-Boot is aligned on a page boundary.
}
}
+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 const char *const ecc_decoder[] = {
"inactive",
"active on IO",
#endif
}
+static int recovery_mode_enabled(void)
+{
+ return false;
+}
+
/**
* Find the PEI executable in the ROM and execute it.
*
debug("Starting UEFI PEI System Agent\n");
+ /*
+ * 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");
- outb(0x6, PORT_RESET);
- cpu_hlt();
+ reset_cpu(0);
}
/* Pass console handler in pei_data */
if (data) {
int rv;
int (*func)(struct pei_data *);
+ ulong start;
debug("Calling MRC at %p\n", data);
post_code(POST_PRE_MRC);
+ start = get_timer(0);
func = (int (*)(struct pei_data *))data;
rv = func(pei_data);
post_code(POST_MRC);
printf("Nonzero MRC return value.\n");
return -EFAULT;
}
+ debug("MRC execution time %lu ms\n", get_timer(start));
} else {
printf("UEFI PEI System Agent not found.\n");
return -ENOSYS;
debug("System Agent Version %d.%d.%d Build %d\n",
version >> 24 , (version >> 16) & 0xff,
(version >> 8) & 0xff, version & 0xff);
+ debug("MRC output data length %#x at %p\n", pei_data->mrc_output_len,
+ pei_data->mrc_output);
/*
* Send ME init done for SandyBridge here. This is done inside the
* SystemAgent binary on IvyBridge
*/
- done = pci_read_config32(PCH_DEV, PCI_DEVICE_ID);
+ done = x86_pci_read_config32(PCH_DEV, PCI_DEVICE_ID);
done &= BASE_REV_MASK;
if (BASE_REV_SNB == done)
intel_early_me_init_done(ME_INIT_STATUS_SUCCESS);
post_system_agent_init(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);
+ }
+
return 0;
}
+int reserve_arch(void)
+{
+ return mrccache_reserve();
+}
+
static int copy_spd(struct pei_data *peid)
{
const int gpio_vector[] = {41, 42, 43, 10, -1};
*/
/* Top of Upper Usable DRAM, including remap */
- touud = pci_read_config32(dev, TOUUD+4);
+ touud = x86_pci_read_config32(dev, TOUUD+4);
touud <<= 32;
- touud |= pci_read_config32(dev, TOUUD);
+ touud |= x86_pci_read_config32(dev, TOUUD);
/* Top of Lower Usable DRAM */
- tolud = pci_read_config32(dev, TOLUD);
+ tolud = x86_pci_read_config32(dev, TOLUD);
/* Top of Memory - does not account for any UMA */
- tom = pci_read_config32(dev, 0xa4);
+ tom = x86_pci_read_config32(dev, 0xa4);
tom <<= 32;
- tom |= pci_read_config32(dev, 0xa0);
+ tom |= x86_pci_read_config32(dev, 0xa0);
debug("TOUUD %llx TOLUD %08x TOM %llx\n", touud, tolud, tom);
/* ME UMA needs excluding if total memory <4GB */
- me_base = pci_read_config32(dev, 0x74);
+ me_base = x86_pci_read_config32(dev, 0x74);
me_base <<= 32;
- me_base |= pci_read_config32(dev, 0x70);
+ me_base |= x86_pci_read_config32(dev, 0x70);
debug("MEBASE %llx\n", me_base);
}
/* Graphics memory comes next */
- ggc = pci_read_config16(dev, GGC);
+ ggc = x86_pci_read_config16(dev, GGC);
if (!(ggc & 2)) {
debug("IGD decoded, subtracting ");
}
/* Calculate TSEG size from its base which must be below GTT */
- tseg_base = pci_read_config32(dev, 0xb8);
+ tseg_base = x86_pci_read_config32(dev, 0xb8);
uma_size = (uma_memory_base - tseg_base) >> 10;
tomk -= uma_size;
uma_memory_base = tomk * 1024ULL;
.mchbar = DEFAULT_MCHBAR,
.dmibar = DEFAULT_DMIBAR,
.epbar = DEFAULT_EPBAR,
- .pciexbar = CONFIG_MMCONF_BASE_ADDRESS,
+ .pciexbar = CONFIG_PCIE_ECAM_BASE,
.smbusbar = SMBUS_IO_BASE,
.wdbbar = 0x4000000,
.wdbsize = 0x1000,
int ret;
debug("Boot mode %d\n", gd->arch.pei_boot_mode);
- debug("mcr_input %p\n", pei_data.mrc_input);
+ debug("mrc_input %p\n", pei_data.mrc_input);
pei_data.boot_mode = gd->arch.pei_boot_mode;
ret = copy_spd(&pei_data);
if (!ret)