src/soc/intel/apollolake/car.c

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 #include <assert.h>
   4 #include <intelblocks/msr.h>
   5 #include <program_loading.h>
   6 #include <soc/cpu.h>
   7
   8 /*
   9  * This file supports the necessary hoops one needs to jump through since
  10  * early FSP component and early stages are running from cache-as-ram.
  11  */
  12
  13 static inline int is_car_addr(uintptr_t addr)
  14 {
  15         return ((addr >= CONFIG_DCACHE_RAM_BASE) &&
  16                 (addr < (CONFIG_DCACHE_RAM_BASE + CONFIG_DCACHE_RAM_SIZE)));
  17 }
  18
  19 void platform_segment_loaded(uintptr_t start, size_t size, int flags)
  20 {
  21         /* Bail out if this is not the final segment. */
  22         if (!(flags & SEG_FINAL))
  23                 return;
  24
  25         char start_car_check = is_car_addr(start);
  26         char end_car_check = is_car_addr(start + size - 1);
  27
  28         /* Bail out if loaded program segment does not lie in CAR region. */
  29         if (!start_car_check && !end_car_check)
  30                 return;
  31
  32         /* Loaded program segment should lie entirely within CAR region. */
  33         assert(start_car_check && end_car_check);
  34
  35         flush_l1d_to_l2();
  36 }