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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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc.
*/
#include <arch/exception.h>
#include <arch/hlt.h>
#include <arch/stages.h>
#include <bootblock_common.h>
#include <console/console.h>
#include <program_loading.h>
#include <soc/addressmap.h>
#include <soc/clock.h>
#include <soc/nvidia/tegra/apbmisc.h>
#include <soc/pmc.h>
#include <soc/power.h>
#include <timestamp.h>
#define BCT_OFFSET_IN_BIT 0x50
#define ODMDATA_OFFSET_IN_BCT 0x6A8
#define TEGRA_SRAM_MAX (TEGRA_SRAM_BASE + TEGRA_SRAM_SIZE)
static void save_odmdata(void)
{
struct tegra_pmc_regs *pmc = (struct tegra_pmc_regs*)TEGRA_PMC_BASE;
uintptr_t bct_offset;
u32 odmdata;
// pmc.odmdata: [18:19]: console type, [15:17]: UART id.
// TODO(twarren) ODMDATA is stored in the BCT, from bct/odmdata.cfg.
// I use the BCT offset in the BIT in SRAM to locate the BCT, and
// pick up the ODMDATA word at BCT offset 0x6A8. I could use a BCT
// struct header from cbootimage, but it seems like overkill for this.
bct_offset = read32((void *)(TEGRA_SRAM_BASE + BCT_OFFSET_IN_BIT));
if (bct_offset > TEGRA_SRAM_BASE && bct_offset < TEGRA_SRAM_MAX) {
odmdata = read32((void *)(bct_offset + ODMDATA_OFFSET_IN_BCT));
write32(&pmc->odmdata, odmdata);
}
}
void __attribute__((weak)) bootblock_mainboard_early_init(void)
{
/* Empty default implementation. */
}
void main(void)
{
// enable JTAG at the earliest stage
enable_jtag();
clock_early_uart();
/* Configure mselect clock. */
clock_configure_source(mselect, PLLP, 102000);
/* Enable AVP cache, timer, APB dma, and mselect blocks. */
clock_enable_clear_reset(CLK_L_CACHE2 | CLK_L_TMR,
CLK_H_APBDMA,
0, CLK_V_MSELECT, 0, 0, 0);
/* Find ODMDATA in IRAM and save it to scratch reg */
save_odmdata();
bootblock_mainboard_early_init();
if (CONFIG_BOOTBLOCK_CONSOLE) {
console_init();
exception_init();
printk(BIOS_INFO, "T210: Bootblock here\n");
}
clock_init();
printk(BIOS_INFO, "T210 bootblock: Clock init done\n");
pmc_print_rst_status();
bootblock_mainboard_init();
printk(BIOS_INFO, "T210 bootblock: Mainboard bootblock init done\n");
run_romstage();
}
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