src/drivers/intel/fsp2_0/temp_ram_exit.c

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 #include <arch/romstage.h>
   4 #include <cbfs.h>
   5 #include <console/console.h>
   6 #include <fsp/api.h>
   7 #include <fsp/util.h>
   8 #include <mode_switch.h>
   9 #include <types.h>
  10
  11 static void fsp_temp_ram_exit(void)
  12 {
  13         struct fsp_header hdr;
  14         uint32_t status;
  15         temp_ram_exit_fn  temp_ram_exit;
  16         void *mapping;
  17         size_t size;
  18         const char *name = CONFIG_FSP_M_CBFS;
  19
  20         mapping = cbfs_map(name, &size);
  21         if (!mapping) {
  22                 printk(BIOS_CRIT, "Could not map %s from CBFS\n", name);
  23                 die("FSPM not available for CAR Exit!\n");
  24         }
  25
  26         if (fsp_validate_component(&hdr, mapping, size) != CB_SUCCESS)
  27                 die("Invalid FSPM header!\n");
  28
  29         temp_ram_exit = (void *)(uintptr_t)(hdr.image_base + hdr.temp_ram_exit_entry_offset);
  30         printk(BIOS_DEBUG, "Calling TempRamExit: %p\n", temp_ram_exit);
  31         if (ENV_X86_64 && CONFIG(PLATFORM_USES_FSP2_X86_32))
  32                 status = protected_mode_call_1arg(temp_ram_exit, 0);
  33         else
  34                 status = temp_ram_exit(NULL);
  35
  36         if (status != FSP_SUCCESS)
  37                 die("TempRamExit returned with error 0x%08x!\n", status);
  38
  39         cbfs_unmap(mapping);
  40 }
  41
  42 void late_car_teardown(void)
  43 {
  44         fsp_temp_ram_exit();
  45 }