src/arch/x86/acpi_s3.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <console/console.h>
   4 #include <string.h>
   5 #include <acpi/acpi.h>
   6 #include <arch/cpu.h>
   7 #include <commonlib/helpers.h>
   8 #include <fallback.h>
   9 #include <timestamp.h>
  10
  11 #define WAKEUP_BASE 0x600
  12
  13 asmlinkage void (*acpi_do_wakeup)(uintptr_t vector) = (void *)WAKEUP_BASE;
  14
  15 extern unsigned char __wakeup;
  16 extern unsigned int __wakeup_size;
  17
  18 void __noreturn acpi_resume(void *wake_vec)
  19 {
  20         /* Call mainboard resume handler first, if defined. */
  21         mainboard_suspend_resume();
  22
  23         /* Copy wakeup trampoline in place. */
  24         memcpy((void *)WAKEUP_BASE, &__wakeup, __wakeup_size);
  25
  26         set_boot_successful();
  27
  28         timestamp_add_now(TS_ACPI_WAKE_JUMP);
  29
  30         post_code(POSTCODE_OS_RESUME);
  31         acpi_do_wakeup((uintptr_t)wake_vec);
  32
  33         die("Failed the jump to wakeup vector\n");
  34 }