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/*
* This file is part of the coreboot project.
*
* Copyright 2018 Facebook, Inc.
* Copyright 2003-2017 Cavium Inc. <support@cavium.com>
* Copyright 2019 9elements Agency GmbH
*
* 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.
*
* Derived from Cavium's BSD-3 Clause OCTEONTX-SDK-6.2.0.
*/
#include <console/console.h>
#include <soc/sdram.h>
#include <libbdk-arch/bdk-warn.h>
#include <libbdk-arch/bdk-csrs-rst.h>
#include <libbdk-boot/bdk-watchdog.h>
#include <libbdk-dram/bdk-dram-config.h>
#include <libbdk-dram/bdk-dram-test.h>
#include <libbdk-hal/bdk-config.h>
#include <libbdk-hal/bdk-utils.h>
#include <libbdk-hal/bdk-l2c.h>
#include <libdram/libdram-config.h>
#include <soc/ecam.h>
#include <device/pci_ops.h>
#include <device/mmio.h>
#include <device/pci.h>
size_t sdram_size_mb(void)
{
return bdk_dram_get_size_mbytes(0);
}
#define BDK_RNM_CTL_STATUS 0
#define BDK_RNM_RANDOM 0x100000
#if ENV_ROMSTAGE
/* Enable RNG for DRAM init */
static void rnm_init(void)
{
/* Bus numbers are hardcoded in ASIC. No need to program bridges. */
pci_devfn_t dev = PCI_DEV(2, 0, 0);
u64 *bar = (u64 *)ecam0_get_bar_val(dev, 0);
if (!bar) {
printk(BIOS_ERR, "RNG: Failed to get BAR0\n");
return;
}
printk(BIOS_DEBUG, "RNG: BAR0 at %p\n", bar);
u64 reg = read64(&bar[BDK_RNM_CTL_STATUS]);
/*
* Enables the output of the RNG.
* Entropy enable for random number generator.
*/
reg |= 3;
write64(&bar[BDK_RNM_CTL_STATUS], reg);
/* Read back after enable so we know it is done. */
reg = read64(&bar[BDK_RNM_CTL_STATUS]);
/*
* Errata (RNM-22528) First consecutive reads to RNM_RANDOM return same
* value. Before using the random entropy, read RNM_RANDOM at least once
* and discard the data
*/
reg = read64(&bar[BDK_RNM_RANDOM]);
printk(BIOS_SPEW, "RNG: RANDOM %llx\n", reg);
reg = read64(&bar[BDK_RNM_RANDOM]);
printk(BIOS_SPEW, "RNG: RANDOM %llx\n", reg);
}
/* based on bdk_boot_dram() */
void sdram_init(void)
{
printk(BIOS_DEBUG, "Initializing DRAM\n");
rnm_init();
/**
* FIXME: second arg is actually a desired frequency if set (the
* function usually obtains frequency via the config). That might
* be useful if FDT or u-boot env is too cumbersome.
*/
int mbytes = bdk_dram_config(0, 0);
if (mbytes < 0) {
bdk_error("N0: Failed DRAM init\n");
die("DRAM INIT FAILED !\n");
}
/* Poke the watchdog */
bdk_watchdog_poke();
/* Report DRAM status */
printf("N0: DRAM:%s\n", bdk_dram_get_info_string(0));
/* See if we should test this node's DRAM during boot */
int test_dram = bdk_config_get_int(BDK_CONFIG_DRAM_BOOT_TEST, 0);
if (test_dram == 1) {
static const u8 tests[] = {13, 0, 1};
for (size_t i = 0; i < ARRAY_SIZE(tests); i++) {
/* Run the address test to make sure DRAM works */
if (bdk_dram_test(tests[i], 4 * MiB,
sdram_size_mb() * MiB - 4 * MiB,
BDK_DRAM_TEST_NO_STATS |
BDK_DRAM_TEST_NODE0)) {
printk(BIOS_CRIT, "%s: Failed DRAM test.\n",
__func__);
}
bdk_watchdog_poke();
}
} else {
/* Run the address test to make sure DRAM works */
if (bdk_dram_test(13, 4 * MiB,
sdram_size_mb() * MiB - 4 * MiB,
BDK_DRAM_TEST_NO_STATS |
BDK_DRAM_TEST_NODE0)) {
/**
* FIXME(dhendrix): This should be handled by mainboard
* code since we don't necessarily have a BMC to report
* to. Also, we need to figure out if we need to keep
* going as to avoid getting into a boot loop.
*/
// bdk_boot_status(BDK_BOOT_STATUS_REQUEST_POWER_CYCLE);
printk(BIOS_CRIT, "%s: Failed DRAM test.\n", __func__);
}
}
bdk_watchdog_poke();
/* Unlock L2 now that DRAM works */
if (0 == bdk_numa_master()) {
uint64_t l2_size = bdk_l2c_get_cache_size_bytes(0);
BDK_TRACE(INIT, "Unlocking L2\n");
bdk_l2c_unlock_mem_region(0, 0, l2_size);
bdk_watchdog_poke();
}
printk(BIOS_INFO, "SDRAM initialization finished.\n");
}
#endif
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