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 <common/debug.h>
13 #include <drivers/console.h>
14 #if RAS_EXTENSION
15 #include <lib/extensions/ras.h>
16 #endif
17 #include <lib/xlat_tables/xlat_mmu_helpers.h>
18 #include <plat/common/platform.h>
19
20 /*
21 * The following platform setup functions are weakly defined. They
22 * provide typical implementations that may be re-used by multiple
23 * platforms but may also be overridden by a platform if required.
24 */
25 #pragma weak bl31_plat_runtime_setup
26
27 #if SDEI_SUPPORT
28 #pragma weak plat_sdei_handle_masked_trigger
29 #pragma weak plat_sdei_validate_entry_point
30 #endif
31
32 #pragma weak plat_ea_handler = plat_default_ea_handler
33
bl31_plat_runtime_setup(void)34 void bl31_plat_runtime_setup(void)
35 {
36 console_switch_state(CONSOLE_FLAG_RUNTIME);
37 }
38
39 /*
40 * Helper function for platform_get_pos() when platform compatibility is
41 * disabled. This is to enable SPDs using the older platform API to continue
42 * to work.
43 */
platform_core_pos_helper(unsigned long mpidr)44 unsigned int platform_core_pos_helper(unsigned long mpidr)
45 {
46 int idx = plat_core_pos_by_mpidr(mpidr);
47 assert(idx >= 0);
48 return idx;
49 }
50
51 #if SDEI_SUPPORT
52 /*
53 * Function that handles spurious SDEI interrupts while events are masked.
54 */
plat_sdei_handle_masked_trigger(uint64_t mpidr,unsigned int intr)55 void plat_sdei_handle_masked_trigger(uint64_t mpidr, unsigned int intr)
56 {
57 WARN("Spurious SDEI interrupt %u on masked PE %" PRIx64 "\n", intr, mpidr);
58 }
59
60 /*
61 * Default Function to validate SDEI entry point, which returns success.
62 * Platforms may override this with their own validation mechanism.
63 */
plat_sdei_validate_entry_point(uintptr_t ep,unsigned int client_mode)64 int plat_sdei_validate_entry_point(uintptr_t ep, unsigned int client_mode)
65 {
66 return 0;
67 }
68 #endif
69
get_el_str(unsigned int el)70 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 "EL1";
78 }
79
80 /* 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)81 void plat_default_ea_handler(unsigned int ea_reason, uint64_t syndrome, void *cookie,
82 void *handle, uint64_t flags)
83 {
84 #if RAS_EXTENSION
85 /* Call RAS EA handler */
86 int handled = ras_ea_handler(ea_reason, syndrome, cookie, handle, flags);
87 if (handled != 0)
88 return;
89 #endif
90 unsigned int level = (unsigned int)GET_EL(read_spsr_el3());
91
92 ERROR_NL();
93 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%" PRIx64 "\n", ea_reason, syndrome);
96 #if HANDLE_EA_EL3_FIRST_NS
97 /* Skip backtrace for lower EL */
98 if (level != MODE_EL3) {
99 console_flush();
100 do_panic();
101 }
102 #endif
103 panic();
104 }
105