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/*
* This file is part of the coreboot project.
*
* Copyright 2014 Google Inc.
*
* 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 <device/mmio.h>
#include <console/console.h>
#include <soc/addressmap.h>
#include <soc/clock.h>
#include <soc/clk_rst.h>
#include <soc/ccplex.h>
#include <soc/cpu.h>
#include <soc/flow.h>
#include <soc/mc.h>
#include <soc/pmc.h>
#include <soc/power.h>
#include <soc/romstage.h>
#include <string.h>
#include <timer.h>
#define PMC_REGS (void *)(uintptr_t)(TEGRA_PMC_BASE)
static void enable_cpu_clocks(void)
{
clock_enable(CLK_ENB_CPU, 0, 0, SET_CLK_ENB_CPUG_ENABLE |
SET_CLK_ENB_CPULP_ENABLE, 0, 0, 0);
}
static void enable_cpu_power_partitions(void)
{
/* Bring up fast cluster, non-CPU, CPU0, CPU1, CPU2 and CPU3 parts. */
power_ungate_partition(POWER_PARTID_CRAIL);
power_ungate_partition(POWER_PARTID_C0NC);
power_ungate_partition(POWER_PARTID_CE0);
if (CONFIG(ARM64_USE_ARM_TRUSTED_FIRMWARE)) {
/*
* Deassert reset signal of all the secondary CPUs.
* PMC and flow controller will take over the power sequence
* controller in the ATF.
*/
uint32_t reg = CRC_RST_CPUG_CLR_CPU1 | CRC_RST_CPUG_CLR_DBG1 |
CRC_RST_CPUG_CLR_CORE1 | CRC_RST_CPUG_CLR_CX1 |
CRC_RST_CPUG_CLR_CPU2 | CRC_RST_CPUG_CLR_DBG2 |
CRC_RST_CPUG_CLR_CORE2 | CRC_RST_CPUG_CLR_CX2 |
CRC_RST_CPUG_CLR_CPU3 | CRC_RST_CPUG_CLR_DBG3 |
CRC_RST_CPUG_CLR_CORE3 | CRC_RST_CPUG_CLR_CX3;
write32(CLK_RST_REG(rst_cpug_cmplx_clr), reg);
}
}
static void request_ram_repair(void)
{
struct flow_ctlr * const flow = (void *)(uintptr_t)TEGRA_FLOW_BASE;
const uint32_t req = 1 << 0;
const uint32_t sts = 1 << 1;
uint32_t reg;
struct stopwatch sw;
printk(BIOS_DEBUG, "Requesting RAM repair.\n");
stopwatch_init(&sw);
/* Perform RAM repair */
reg = read32(&flow->ram_repair);
reg |= req;
write32(&flow->ram_repair, reg);
while ((read32(&flow->ram_repair) & sts) != sts)
;
printk(BIOS_DEBUG, "RAM repair complete in %ld usecs.\n",
stopwatch_duration_usecs(&sw));
}
static void set_cpu_ack_width(uint32_t val)
{
uint32_t reg;
reg = read32(CLK_RST_REG(cpu_softrst_ctrl2));
reg &= ~CAR2PMC_CPU_ACK_WIDTH_MASK;
reg |= val;
write32(CLK_RST_REG(cpu_softrst_ctrl2), reg);
}
void ccplex_cpu_prepare(void)
{
enable_cpu_clocks();
/*
* The POR value of CAR2PMC_CPU_ACK_WIDTH is 0x200.
* The recommended value is 0.
*/
set_cpu_ack_width(0);
enable_cpu_power_partitions();
mainboard_configure_pmc();
mainboard_enable_vdd_cpu();
request_ram_repair();
}
static void start_common_clocks(void)
{
/* Clear fast CPU partition reset. */
write32(CLK_RST_REG(rst_cpug_cmplx_clr), CRC_RST_CPUG_CLR_NONCPU);
/* Clear reset of L2 and CoreSight components. */
write32(CLK_RST_REG(rst_cpug_cmplx_clr),
CRC_RST_CPUG_CLR_L2 | CRC_RST_CPUG_CLR_PDBG);
}
void ccplex_cpu_start(void *entry_addr)
{
/* Enable common clocks for the shared resources between the cores. */
start_common_clocks();
start_cpu(0, entry_addr);
}
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