arch/sandbox/cpu/state.c

   1 /*
   2  * Copyright (c) 2011-2012 The Chromium OS Authors.
   3  * SPDX-License-Identifier:     GPL-2.0+
   4  */
   5
   6 #include <common.h>
   7 #include <os.h>
   8 #include <asm/state.h>
   9
  10 /* Main state record for the sandbox */
  11 static struct sandbox_state main_state;
  12 static struct sandbox_state *state;     /* Pointer to current state record */
  13
  14 void state_record_exit(enum exit_type_id exit_type)
  15 {
  16         state->exit_type = exit_type;
  17 }
  18
  19 struct sandbox_state *state_get_current(void)
  20 {
  21         assert(state);
  22         return state;
  23 }
  24
  25 int state_init(void)
  26 {
  27         state = &main_state;
  28
  29         state->ram_size = CONFIG_SYS_SDRAM_SIZE;
  30         state->ram_buf = os_malloc(state->ram_size);
  31         assert(state->ram_buf);
  32
  33         /*
  34          * Example of how to use GPIOs:
  35          *
  36          * sandbox_gpio_set_direction(170, 0);
  37          * sandbox_gpio_set_value(170, 0);
  38          */
  39         return 0;
  40 }
  41
  42 int state_uninit(void)
  43 {
  44         int err;
  45
  46         state = &main_state;
  47
  48         if (state->write_ram_buf) {
  49                 err = os_write_ram_buf(state->ram_buf_fname);
  50                 if (err) {
  51                         printf("Failed to write RAM buffer\n");
  52                         return err;
  53                 }
  54         }
  55
  56         return 0;
  57 }