1 /*
2 * Copyright (c) 2014-2025, 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 ENABLE_FEAT_RAS
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 /* Pointer and function to register platform function to load alernate images */
21 const struct plat_try_images_ops *plat_try_img_ops;
22
plat_setup_try_img_ops(const struct plat_try_images_ops * plat_try_ops)23 void plat_setup_try_img_ops(const struct plat_try_images_ops *plat_try_ops)
24 {
25 plat_try_img_ops = plat_try_ops;
26 }
27
28 /*
29 * The following platform setup functions are weakly defined. They
30 * provide typical implementations that may be re-used by multiple
31 * platforms but may also be overridden by a platform if required.
32 */
33 #pragma weak bl31_plat_runtime_setup
34
35 #if SDEI_SUPPORT
36 #pragma weak plat_sdei_handle_masked_trigger
37 #pragma weak plat_sdei_validate_entry_point
38 #endif
39
40 #if FFH_SUPPORT
41 #pragma weak plat_ea_handler = plat_default_ea_handler
42 #endif
43
bl31_plat_runtime_setup(void)44 void bl31_plat_runtime_setup(void)
45 {
46 }
47
48 #if SDEI_SUPPORT
49 /*
50 * Function that handles spurious SDEI interrupts while events are masked.
51 */
plat_sdei_handle_masked_trigger(uint64_t mpidr,unsigned int intr)52 void plat_sdei_handle_masked_trigger(uint64_t mpidr, unsigned int intr)
53 {
54 WARN("Spurious SDEI interrupt %u on masked PE %" PRIx64 "\n", intr, mpidr);
55 }
56
57 /*
58 * Default Function to validate SDEI entry point, which returns success.
59 * Platforms may override this with their own validation mechanism.
60 */
plat_sdei_validate_entry_point(uintptr_t ep,unsigned int client_mode)61 int plat_sdei_validate_entry_point(uintptr_t ep, unsigned int client_mode)
62 {
63 return 0;
64 }
65 #endif
66
get_el_str(unsigned int el)67 const char *get_el_str(unsigned int el)
68 {
69 const char *mode = NULL;
70
71 switch (el) {
72 case MODE_EL3:
73 mode = "EL3";
74 break;
75 case MODE_EL2:
76 mode = "EL2";
77 break;
78 case MODE_EL1:
79 mode = "EL1";
80 break;
81 case MODE_EL0:
82 mode = "EL0";
83 break;
84 default:
85 assert(false);
86 break;
87 }
88
89 return mode;
90 }
91
92 #if FFH_SUPPORT
93 /* Handler for External Aborts from lower EL including RAS errors */
plat_default_ea_handler(unsigned int ea_reason,uint64_t syndrome,void * cookie,void * handle,uint64_t flags)94 void plat_default_ea_handler(unsigned int ea_reason, uint64_t syndrome, void *cookie,
95 void *handle, uint64_t flags)
96 {
97 #if ENABLE_FEAT_RAS
98 /* Call RAS EA handler */
99 int handled = ras_ea_handler(ea_reason, syndrome, cookie, handle, flags);
100 if (handled != 0)
101 return;
102 #endif
103 unsigned int level = (unsigned int)GET_EL(read_spsr_el3());
104
105 ERROR_NL();
106 ERROR("Unhandled External Abort received on 0x%lx from %s\n",
107 read_mpidr_el1(), get_el_str(level));
108 ERROR("exception reason=%u syndrome=0x%" PRIx64 "\n", ea_reason, syndrome);
109
110 /* We reached here due to a panic from a lower EL and assuming this is the default
111 * platform registered handler that we could call on a lower EL panic.
112 */
113 lower_el_panic();
114 }
115 #endif
116