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https://github.com/ARM-software/arm-trusted-firmware.git
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dd9fae1ce0
The function is called in a fully initialised C environment and calls into other C functions. The Aarch differences are minimal and are hidden by the pre-existing headers. Converting it results into cleaner code that is the same across both Aarch64 and Aarch32. To avoid having to do very ugly pointer arithmetic, define a C struct for the cpu_ops for both Aarch64 and Aarch32. Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com> Change-Id: Idc07c4064e03143c88a4a0e2d10ceda70ba19a50
140 lines
3.1 KiB
C
140 lines
3.1 KiB
C
/*
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* Copyright (c) 2017-2023, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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/* Runtime firmware routines to report errata status for the current CPU. */
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#include <assert.h>
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#include <stdbool.h>
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#include <arch_helpers.h>
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#include <common/debug.h>
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#include <lib/cpus/cpu_ops.h>
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#include <lib/cpus/errata.h>
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#include <lib/el3_runtime/cpu_data.h>
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#include <lib/spinlock.h>
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#ifdef IMAGE_BL1
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# define BL_STRING "BL1"
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#elif defined(__aarch64__) && defined(IMAGE_BL31)
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# define BL_STRING "BL31"
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#elif !defined(__aarch64__) && defined(IMAGE_BL32)
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# define BL_STRING "BL32"
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#elif defined(IMAGE_BL2) && RESET_TO_BL2
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# define BL_STRING "BL2"
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#else
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# error This image should not be printing errata status
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#endif
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/* Errata format: BL stage, CPU, errata ID, message */
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#define ERRATA_FORMAT "%s: %s: CPU workaround for %s was %s\n"
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#if !REPORT_ERRATA
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void print_errata_status(void) {}
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#else /* !REPORT_ERRATA */
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/*
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* Returns whether errata needs to be reported. Passed arguments are private to
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* a CPU type.
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*/
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static __unused int errata_needs_reporting(spinlock_t *lock, uint32_t *reported)
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{
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bool report_now;
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/* If already reported, return false. */
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if (*reported != 0U)
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return 0;
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/*
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* Acquire lock. Determine whether status needs reporting, and then mark
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* report status to true.
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*/
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spin_lock(lock);
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report_now = (*reported == 0U);
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if (report_now)
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*reported = 1;
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spin_unlock(lock);
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return report_now;
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}
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/*
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* Function to print errata status for the calling CPU (and others of the same
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* type). Must be called only:
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* - when MMU and data caches are enabled;
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* - after cpu_ops have been initialized in per-CPU data.
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*/
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void print_errata_status(void)
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{
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struct cpu_ops *cpu_ops;
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#ifdef IMAGE_BL1
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/*
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* BL1 doesn't have per-CPU data. So retrieve the CPU operations
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* directly.
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*/
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cpu_ops = get_cpu_ops_ptr();
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if (cpu_ops->errata_func != NULL) {
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cpu_ops->errata_func();
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}
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#else /* IMAGE_BL1 */
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cpu_ops = (void *) get_cpu_data(cpu_ops_ptr);
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assert(cpu_ops != NULL);
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if (cpu_ops->errata_func == NULL) {
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return;
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}
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if (errata_needs_reporting(cpu_ops->errata_lock, cpu_ops->errata_reported)) {
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cpu_ops->errata_func();
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}
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#endif /* IMAGE_BL1 */
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}
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/*
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* Print errata status message.
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*
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* Unknown: WARN
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* Missing: WARN
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* Applied: INFO
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* Not applied: VERBOSE
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*/
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void errata_print_msg(unsigned int status, const char *cpu, const char *id)
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{
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/* Errata status strings */
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static const char *const errata_status_str[] = {
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[ERRATA_NOT_APPLIES] = "not applied",
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[ERRATA_APPLIES] = "applied",
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[ERRATA_MISSING] = "missing!"
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};
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static const char *const __unused bl_str = BL_STRING;
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const char *msg __unused;
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assert(status < ARRAY_SIZE(errata_status_str));
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assert(cpu != NULL);
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assert(id != NULL);
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msg = errata_status_str[status];
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switch (status) {
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case ERRATA_NOT_APPLIES:
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VERBOSE(ERRATA_FORMAT, bl_str, cpu, id, msg);
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break;
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case ERRATA_APPLIES:
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INFO(ERRATA_FORMAT, bl_str, cpu, id, msg);
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break;
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case ERRATA_MISSING:
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WARN(ERRATA_FORMAT, bl_str, cpu, id, msg);
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break;
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default:
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WARN(ERRATA_FORMAT, bl_str, cpu, id, "unknown");
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break;
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}
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}
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#endif /* !REPORT_ERRATA */
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