arch/sandbox/cpu/cpu.c

   1 /*
   2  * Copyright (c) 2011 The Chromium OS Authors.
   3  * SPDX-License-Identifier:     GPL-2.0+
   4  */
   5
   6 #include <common.h>
   7 #include <dm/root.h>
   8 #include <os.h>
   9 #include <asm/state.h>
  10
  11 DECLARE_GLOBAL_DATA_PTR;
  12
  13 void reset_cpu(ulong ignored)
  14 {
  15         if (state_uninit())
  16                 os_exit(2);
  17
  18         if (dm_uninit())
  19                 os_exit(2);
  20
  21         /* This is considered normal termination for now */
  22         os_exit(0);
  23 }
  24
  25 int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  26 {
  27         reset_cpu(0);
  28
  29         return 0;
  30 }
  31
  32 /* delay x useconds */
  33 void __udelay(unsigned long usec)
  34 {
  35         os_usleep(usec);
  36 }
  37
  38 unsigned long __attribute__((no_instrument_function)) timer_get_us(void)
  39 {
  40         return os_get_nsec() / 1000;
  41 }
  42
  43 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
  44 {
  45         if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
  46                 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
  47                 printf("## Transferring control to Linux (at address %08lx)...\n",
  48                        images->ep);
  49                 reset_cpu(0);
  50         }
  51
  52         return 0;
  53 }
  54
  55 int cleanup_before_linux(void)
  56 {
  57         return 0;
  58 }
  59
  60 void *map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
  61 {
  62         return (void *)(gd->arch.ram_buf + paddr);
  63 }
  64
  65 phys_addr_t map_to_sysmem(const void *ptr)
  66 {
  67         return (u8 *)ptr - gd->arch.ram_buf;
  68 }
  69
  70 void flush_dcache_range(unsigned long start, unsigned long stop)
  71 {
  72 }