1 /*
2 * Copyright (c) 2014-2020, 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/extensions/twed.h>
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 #pragma weak plat_arm_set_twedel_scr_el3
27
28 #if SDEI_SUPPORT
29 #pragma weak plat_sdei_handle_masked_trigger
30 #pragma weak plat_sdei_validate_entry_point
31 #endif
32
33 #pragma weak plat_ea_handler = plat_default_ea_handler
34
bl31_plat_runtime_setup(void)35 void bl31_plat_runtime_setup(void)
36 {
37 console_switch_state(CONSOLE_FLAG_RUNTIME);
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 */
platform_core_pos_helper(unsigned long mpidr)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 */
plat_sdei_handle_masked_trigger(uint64_t mpidr,unsigned int intr)56 void plat_sdei_handle_masked_trigger(uint64_t mpidr, unsigned int intr)
57 {
58 WARN("Spurious SDEI interrupt %u on masked PE %" PRIx64 "\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 */
plat_sdei_validate_entry_point(uintptr_t ep,unsigned int client_mode)65 int plat_sdei_validate_entry_point(uintptr_t ep, unsigned int client_mode)
66 {
67 return 0;
68 }
69 #endif
70
71 #if !ENABLE_BACKTRACE
get_el_str(unsigned int el)72 static const char *get_el_str(unsigned int el)
73 {
74 if (el == MODE_EL3) {
75 return "EL3";
76 } else if (el == MODE_EL2) {
77 return "EL2";
78 }
79 return "S-EL1";
80 }
81 #endif /* !ENABLE_BACKTRACE */
82
83 /* 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)84 void plat_default_ea_handler(unsigned int ea_reason, uint64_t syndrome, void *cookie,
85 void *handle, uint64_t flags)
86 {
87 #if RAS_EXTENSION
88 /* Call RAS EA handler */
89 int handled = ras_ea_handler(ea_reason, syndrome, cookie, handle, flags);
90 if (handled != 0)
91 return;
92 #endif
93 unsigned int level = (unsigned int)GET_EL(read_spsr_el3());
94
95 ERROR_NL();
96 ERROR("Unhandled External Abort received on 0x%lx from %s\n",
97 read_mpidr_el1(), get_el_str(level));
98 ERROR("exception reason=%u syndrome=0x%" PRIx64 "\n", ea_reason, syndrome);
99 #if HANDLE_EA_EL3_FIRST
100 /* Skip backtrace for lower EL */
101 if (level != MODE_EL3) {
102 console_flush();
103 do_panic();
104 }
105 #endif
106 panic();
107 }
108
109 /*******************************************************************************
110 * In v8.6+ platforms with delayed trapping of WFE this hook sets the delay. It
111 * is a weak function definition so can be overridden depending on the
112 * requirements of a platform. The only hook provided is for the TWED fields
113 * in SCR_EL3, the TWED fields in HCR_EL2, SCTLR_EL2, and SCTLR_EL1 should be
114 * configured as needed in lower exception levels.
115 ******************************************************************************/
116
plat_arm_set_twedel_scr_el3(void)117 uint32_t plat_arm_set_twedel_scr_el3(void)
118 {
119 return TWED_DISABLED;
120 }
121