1 /*
2 * Copyright (c) 2014-2022, ARM Limited and Contributors. All rights reserved.
3 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 */
6
7 #include <assert.h>
8 #include <inttypes.h>
9 #include <stdint.h>
10
11 #include <arch_helpers.h>
12 #include <drivers/console.h>
13 #if RAS_EXTENSION
14 #include <lib/extensions/ras.h>
15 #endif
16 #include <lib/xlat_tables/xlat_mmu_helpers.h>
17 #include <plat/common/platform.h>
18
19 /*
20 * The following platform setup functions are weakly defined. They
21 * provide typical implementations that may be re-used by multiple
22 * platforms but may also be overridden by a platform if required.
23 */
24 #pragma weak bl31_plat_runtime_setup
25
26 #if SDEI_SUPPORT
27 #pragma weak plat_sdei_handle_masked_trigger
28 #pragma weak plat_sdei_validate_entry_point
29 #endif
30
31 #pragma weak plat_ea_handler = plat_default_ea_handler
32
bl31_plat_runtime_setup(void)33 void bl31_plat_runtime_setup(void)
34 {
35 console_switch_state(CONSOLE_FLAG_RUNTIME);
36 }
37
38 /*
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 */
platform_core_pos_helper(unsigned long mpidr)43 unsigned 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 }
49
50 #if SDEI_SUPPORT
51 /*
52 * Function that handles spurious SDEI interrupts while events are masked.
53 */
plat_sdei_handle_masked_trigger(uint64_t mpidr,unsigned int intr)54 void plat_sdei_handle_masked_trigger(uint64_t mpidr, unsigned int intr)
55 {
56 WARN("Spurious SDEI interrupt %u on masked PE %" PRIx64 "\n", intr, mpidr);
57 }
58
59 /*
60 * Default Function to validate SDEI entry point, which returns success.
61 * Platforms may override this with their own validation mechanism.
62 */
plat_sdei_validate_entry_point(uintptr_t ep,unsigned int client_mode)63 int plat_sdei_validate_entry_point(uintptr_t ep, unsigned int client_mode)
64 {
65 return 0;
66 }
67 #endif
68
69 #if !ENABLE_BACKTRACE
get_el_str(unsigned int el)70 static 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
81 /* RAS functions common to AArch64 ARM platforms */
plat_default_ea_handler(unsigned int ea_reason,uint64_t syndrome,void * cookie,void * handle,uint64_t flags)82 void plat_default_ea_handler(unsigned int ea_reason, uint64_t syndrome, void *cookie,
83 void *handle, uint64_t flags)
84 {
85 #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
91 unsigned int level = (unsigned int)GET_EL(read_spsr_el3());
92
93 ERROR_NL();
94 ERROR("Unhandled External Abort received on 0x%lx from %s\n",
95 read_mpidr_el1(), get_el_str(level));
96 ERROR("exception reason=%u syndrome=0x%" PRIx64 "\n", ea_reason, syndrome);
97 #if HANDLE_EA_EL3_FIRST
98 /* Skip backtrace for lower EL */
99 if (level != MODE_EL3) {
100 console_flush();
101 do_panic();
102 }
103 #endif
104 panic();
105 }
106
