blob: 1e1fc7869e620a28472d2c561587cc701e15aad4 [file] [log] [blame]
Jeenu Viswambharand5ec3672017-01-03 11:01:51 +00001/*
2 * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
3 *
dp-armfa3cf0b2017-05-03 09:38:09 +01004 * SPDX-License-Identifier: BSD-3-Clause
Jeenu Viswambharand5ec3672017-01-03 11:01:51 +00005 */
6
7/* Runtime firmware routines to report errata status for the current CPU. */
8
9#include <arch_helpers.h>
10#include <assert.h>
11#include <cpu_data.h>
12#include <debug.h>
13#include <errata_report.h>
14#include <spinlock.h>
15#include <utils.h>
16
17#ifdef IMAGE_BL1
18# define BL_STRING "BL1"
19#elif defined(AARCH64) && defined(IMAGE_BL31)
20# define BL_STRING "BL31"
21#elif defined(AARCH32) && defined(IMAGE_BL32)
22# define BL_STRING "BL32"
23#else
24# error This image should not be printing errata status
25#endif
26
27/* Errata format: BL stage, CPU, errata ID, message */
28#define ERRATA_FORMAT "%s: %s: errata workaround for %s was %s\n"
29
30/*
31 * Returns whether errata needs to be reported. Passed arguments are private to
32 * a CPU type.
33 */
34int errata_needs_reporting(spinlock_t *lock, uint32_t *reported)
35{
36 int report_now;
37
38 /* If already reported, return false. */
39 if (*reported)
40 return 0;
41
42 /*
43 * Acquire lock. Determine whether status needs reporting, and then mark
44 * report status to true.
45 */
46 spin_lock(lock);
47 report_now = !(*reported);
48 if (report_now)
49 *reported = 1;
50 spin_unlock(lock);
51
52 return report_now;
53}
54
55/*
56 * Print errata status message.
57 *
58 * Unknown: WARN
59 * Missing: WARN
60 * Applied: INFO
61 * Not applied: VERBOSE
62 */
Varun Wadekar66231d12017-06-07 09:57:42 -070063void errata_print_msg(unsigned int status, const char *cpu, const char *id)
Jeenu Viswambharand5ec3672017-01-03 11:01:51 +000064{
65 /* Errata status strings */
66 static const char *const errata_status_str[] = {
67 [ERRATA_NOT_APPLIES] = "not applied",
68 [ERRATA_APPLIES] = "applied",
69 [ERRATA_MISSING] = "missing!"
70 };
71 static const char *const __unused bl_str = BL_STRING;
72 const char *msg __unused;
73
74
75 assert(status >= 0 && status < ARRAY_SIZE(errata_status_str));
76 assert(cpu);
77 assert(id);
78
79 msg = errata_status_str[status];
80
81 switch (status) {
82 case ERRATA_NOT_APPLIES:
83 VERBOSE(ERRATA_FORMAT, bl_str, cpu, id, msg);
84 break;
85
86 case ERRATA_APPLIES:
87 INFO(ERRATA_FORMAT, bl_str, cpu, id, msg);
88 break;
89
90 case ERRATA_MISSING:
91 WARN(ERRATA_FORMAT, bl_str, cpu, id, msg);
92 break;
93
94 default:
95 WARN(ERRATA_FORMAT, bl_str, cpu, id, "unknown");
96 break;
97 }
98}