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Dan Handleyb226a4d2014-05-16 14:08:45 +01001/*
Alexei Fedorov813c9f92020-03-03 13:31:58 +00002 * Copyright (c) 2014-2020, ARM Limited and Contributors. All rights reserved.
Dan Handleyb226a4d2014-05-16 14:08:45 +01003 *
dp-armfa3cf0b2017-05-03 09:38:09 +01004 * SPDX-License-Identifier: BSD-3-Clause
Dan Handleyb226a4d2014-05-16 14:08:45 +01005 */
Jeenu Viswambharan04e3a7f2017-10-16 08:43:14 +01006
Soby Mathew70716d62015-07-13 16:26:11 +01007#include <assert.h>
Antonio Nino Diaze0f90632018-12-14 00:18:21 +00008
9#include <arch_helpers.h>
10#include <drivers/console.h>
Jeenu Viswambharan2e2e8812017-12-08 15:38:21 +000011#if RAS_EXTENSION
Antonio Nino Diaze0f90632018-12-14 00:18:21 +000012#include <lib/extensions/ras.h>
Jeenu Viswambharan2e2e8812017-12-08 15:38:21 +000013#endif
johpow013e24c162020-04-22 14:05:13 -050014#include <lib/extensions/twed.h>
Antonio Nino Diaze0f90632018-12-14 00:18:21 +000015#include <lib/xlat_tables/xlat_mmu_helpers.h>
16#include <plat/common/platform.h>
Dan Handleyb226a4d2014-05-16 14:08:45 +010017
18/*
Soby Mathew1ff495b2015-12-09 11:28:43 +000019 * The following platform setup functions are weakly defined. They
Dan Handleyb226a4d2014-05-16 14:08:45 +010020 * provide typical implementations that may be re-used by multiple
21 * platforms but may also be overridden by a platform if required.
22 */
Soby Mathew1ff495b2015-12-09 11:28:43 +000023#pragma weak bl31_plat_runtime_setup
johpow013e24c162020-04-22 14:05:13 -050024#pragma weak plat_arm_set_twedel_scr_el3
Dan Handleyb226a4d2014-05-16 14:08:45 +010025
Jeenu Viswambharan04e3a7f2017-10-16 08:43:14 +010026#if SDEI_SUPPORT
27#pragma weak plat_sdei_handle_masked_trigger
28#pragma weak plat_sdei_validate_entry_point
29#endif
30
Jeenu Viswambharan96c7df02017-11-30 12:54:15 +000031#pragma weak plat_ea_handler
32
Soby Mathew1ff495b2015-12-09 11:28:43 +000033void bl31_plat_runtime_setup(void)
34{
Julius Werner94f89072017-07-31 18:15:11 -070035 console_switch_state(CONSOLE_FLAG_RUNTIME);
Soby Mathew1ff495b2015-12-09 11:28:43 +000036}
37
Soby Mathew70716d62015-07-13 16:26:11 +010038/*
39 * Helper function for platform_get_pos() when platform compatibility is
40 * disabled. This is to enable SPDs using the older platform API to continue
41 * to work.
42 */
43unsigned int platform_core_pos_helper(unsigned long mpidr)
44{
45 int idx = plat_core_pos_by_mpidr(mpidr);
46 assert(idx >= 0);
47 return idx;
48}
Antonio Nino Diaz391a76e2016-05-18 16:53:31 +010049
Jeenu Viswambharan04e3a7f2017-10-16 08:43:14 +010050#if SDEI_SUPPORT
51/*
52 * Function that handles spurious SDEI interrupts while events are masked.
53 */
54void plat_sdei_handle_masked_trigger(uint64_t mpidr, unsigned int intr)
55{
Masahiro Yamadae93a0f42018-02-02 15:09:36 +090056 WARN("Spurious SDEI interrupt %u on masked PE %llx\n", intr, mpidr);
Jeenu Viswambharan04e3a7f2017-10-16 08:43:14 +010057}
58
59/*
60 * Default Function to validate SDEI entry point, which returns success.
61 * Platforms may override this with their own validation mechanism.
62 */
63int plat_sdei_validate_entry_point(uintptr_t ep, unsigned int client_mode)
64{
65 return 0;
66}
67#endif
Jeenu Viswambharan96c7df02017-11-30 12:54:15 +000068
Alexei Fedorov813c9f92020-03-03 13:31:58 +000069#if !ENABLE_BACKTRACE
70static const char *get_el_str(unsigned int el)
71{
72 if (el == MODE_EL3) {
73 return "EL3";
74 } else if (el == MODE_EL2) {
75 return "EL2";
76 }
77 return "S-EL1";
78}
79#endif /* !ENABLE_BACKTRACE */
80
Jeenu Viswambharan96c7df02017-11-30 12:54:15 +000081/* RAS functions common to AArch64 ARM platforms */
82void plat_ea_handler(unsigned int ea_reason, uint64_t syndrome, void *cookie,
83 void *handle, uint64_t flags)
84{
Jeenu Viswambharan2e2e8812017-12-08 15:38:21 +000085#if RAS_EXTENSION
86 /* Call RAS EA handler */
87 int handled = ras_ea_handler(ea_reason, syndrome, cookie, handle, flags);
88 if (handled != 0)
89 return;
90#endif
Alexei Fedorov813c9f92020-03-03 13:31:58 +000091 unsigned int level = (unsigned int)GET_EL(read_spsr_el3());
Jeenu Viswambharan2e2e8812017-12-08 15:38:21 +000092
Alexei Fedorov813c9f92020-03-03 13:31:58 +000093 ERROR("Unhandled External Abort received on 0x%lx from %s\n",
94 read_mpidr_el1(), get_el_str(level));
95 ERROR("exception reason=%u syndrome=0x%llx\n", ea_reason, syndrome);
96#if HANDLE_EA_EL3_FIRST
97 /* Skip backtrace for lower EL */
98 if (level != MODE_EL3) {
99 (void)console_flush();
100 do_panic();
101 }
102#endif
Jeenu Viswambharan96c7df02017-11-30 12:54:15 +0000103 panic();
104}
johpow013e24c162020-04-22 14:05:13 -0500105
106/*******************************************************************************
107 * In v8.6+ platforms with delayed trapping of WFE this hook sets the delay. It
108 * is a weak function definition so can be overridden depending on the
109 * requirements of a platform. The only hook provided is for the TWED fields
110 * in SCR_EL3, the TWED fields in HCR_EL2, SCTLR_EL2, and SCTLR_EL1 should be
111 * configured as needed in lower exception levels.
112 ******************************************************************************/
113
114uint32_t plat_arm_set_twedel_scr_el3(void)
115{
116 return TWED_DISABLED;
117}