plat/common/aarch64/plat_common.c

   1 /*
   2  * Copyright (c) 2014-2018, ARM Limited and Contributors. All rights reserved.
   3  *
   4  * SPDX-License-Identifier: BSD-3-Clause
   5  */
   6
   7 #include <assert.h>
   8
   9 #include <arch_helpers.h>
  10 #include <drivers/console.h>
  11 #if RAS_EXTENSION
  12 #include <lib/extensions/ras.h>
  13 #endif
  14 #include <lib/xlat_tables/xlat_mmu_helpers.h>
  15 #include <plat/common/platform.h>
  16
  17 /*
  18  * The following platform setup functions are weakly defined. They
  19  * provide typical implementations that may be re-used by multiple
  20  * platforms but may also be overridden by a platform if required.
  21  */
  22 #pragma weak bl31_plat_runtime_setup
  23
  24 #if SDEI_SUPPORT
  25 #pragma weak plat_sdei_handle_masked_trigger
  26 #pragma weak plat_sdei_validate_entry_point
  27 #endif
  28
  29 #pragma weak plat_ea_handler
  30
  31 void bl31_plat_runtime_setup(void)
  32 {
  33 #if MULTI_CONSOLE_API
  34         console_switch_state(CONSOLE_FLAG_RUNTIME);
  35 #else
  36         console_uninit();
  37 #endif
  38 }
  39
  40 /*
  41  * Helper function for platform_get_pos() when platform compatibility is
  42  * disabled. This is to enable SPDs using the older platform API to continue
  43  * to work.
  44  */
  45 unsigned int platform_core_pos_helper(unsigned long mpidr)
  46 {
  47         int idx = plat_core_pos_by_mpidr(mpidr);
  48         assert(idx >= 0);
  49         return idx;
  50 }
  51
  52 #if SDEI_SUPPORT
  53 /*
  54  * Function that handles spurious SDEI interrupts while events are masked.
  55  */
  56 void plat_sdei_handle_masked_trigger(uint64_t mpidr, unsigned int intr)
  57 {
  58         WARN("Spurious SDEI interrupt %u on masked PE %llx\n", intr, mpidr);
  59 }
  60
  61 /*
  62  * Default Function to validate SDEI entry point, which returns success.
  63  * Platforms may override this with their own validation mechanism.
  64  */
  65 int plat_sdei_validate_entry_point(uintptr_t ep, unsigned int client_mode)
  66 {
  67         return 0;
  68 }
  69 #endif
  70
  71 /* RAS functions common to AArch64 ARM platforms */
  72 void plat_ea_handler(unsigned int ea_reason, uint64_t syndrome, void *cookie,
  73                 void *handle, uint64_t flags)
  74 {
  75 #if RAS_EXTENSION
  76         /* Call RAS EA handler */
  77         int handled = ras_ea_handler(ea_reason, syndrome, cookie, handle, flags);
  78         if (handled != 0)
  79                 return;
  80 #endif
  81
  82         ERROR("Unhandled External Abort received on 0x%lx at EL3!\n",
  83                         read_mpidr_el1());
  84         ERROR(" exception reason=%u syndrome=0x%llx\n", ea_reason, syndrome);
  85         panic();
  86 }