src/soc/nvidia/tegra124/bootblock.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; version 2 of the License.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include <assert.h>
  16 #include <arch/exception.h>
  17 #include <arch/stages.h>
  18 #include <bootblock_common.h>
  19 #include <console/console.h>
  20 #include <program_loading.h>
  21 #include <soc/clock.h>
  22 #include <soc/nvidia/tegra/apbmisc.h>
  23 #include <soc/pinmux.h>
  24 #include <soc/power.h>
  25 #include <timestamp.h>
  26 #include <vendorcode/google/chromeos/chromeos.h>
  27
  28 /* called from assembly in bootblock_asm.S */
  29 void tegra124_main(void);
  30
  31 static void run_next_stage(void *entry)
  32 {
  33         ASSERT(entry);
  34         clock_cpu0_config(entry);
  35
  36         power_enable_and_ungate_cpu();
  37
  38         /* Repair RAM on cluster0 and cluster1 after CPU is powered on. */
  39         ram_repair();
  40
  41         clock_cpu0_remove_reset();
  42
  43         clock_halt_avp();
  44 }
  45
  46 void tegra124_main(void)
  47 {
  48         // enable pinmux clamp inputs
  49         clamp_tristate_inputs();
  50
  51         // enable JTAG at the earliest stage
  52         enable_jtag();
  53
  54         clock_early_uart();
  55
  56         // Serial out, tristate off.
  57         pinmux_set_config(PINMUX_KB_ROW9_INDEX, PINMUX_KB_ROW9_FUNC_UA3);
  58         // Serial in, tristate_on.
  59         pinmux_set_config(PINMUX_KB_ROW10_INDEX, PINMUX_KB_ROW10_FUNC_UA3 |
  60                                                  PINMUX_PULL_UP |
  61                                                  PINMUX_INPUT_ENABLE);
  62         // Mux some pins away from uart A.
  63         pinmux_set_config(PINMUX_UART2_CTS_N_INDEX,
  64                           PINMUX_UART2_CTS_N_FUNC_UB3 |
  65                           PINMUX_INPUT_ENABLE);
  66         pinmux_set_config(PINMUX_UART2_RTS_N_INDEX,
  67                           PINMUX_UART2_RTS_N_FUNC_UB3);
  68
  69         if (CONFIG(BOOTBLOCK_CONSOLE)) {
  70                 console_init();
  71                 exception_init();
  72         }
  73
  74         clock_init();
  75
  76         bootblock_mainboard_init();
  77
  78         pinmux_set_config(PINMUX_CORE_PWR_REQ_INDEX,
  79                           PINMUX_CORE_PWR_REQ_FUNC_PWRON);
  80         pinmux_set_config(PINMUX_CPU_PWR_REQ_INDEX,
  81                           PINMUX_CPU_PWR_REQ_FUNC_CPU);
  82         pinmux_set_config(PINMUX_PWR_INT_N_INDEX,
  83                           PINMUX_PWR_INT_N_FUNC_PMICINTR |
  84                           PINMUX_INPUT_ENABLE);
  85
  86         timestamp_init(0);
  87
  88         run_romstage();
  89 }
  90
  91 void platform_prog_run(struct prog *prog)
  92 {
  93         run_next_stage(prog_entry(prog));
  94 }