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/*
* Copyright (c) 2018, Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <arch.h>
#include <asm_macros.S>
#include <sdei.h>
#ifdef AARCH64
.globl inject_serror
.globl inject_uncontainable
.globl serror_sdei_event_handler
/*
* Program fault injection register, and wait for ever for the fault to trigger.
* Note that Trusted Firmware must be compiled for ARMv8.4 along with
* FAULT_INJECTION_SUPPORT=1 for this to work. Besides, the model has to be
* launched with fault inject support.
*
* x0: Fault record number to program
* x1: Injected fault properties
* x2: Type of error to be generated
* x3: Memory location to wait for, or 0 if no waiting is required
*/
func inject_serror_record
/* Choose Error record 0 on the PE */
msr ERRSELR_EL1, x0
isb
/* Enable error reporting */
orr x1, x1, #ERXCTLR_ED_BIT
msr ERXCTLR_EL1, x1
/* Program count down timer to 1 */
mov x0, #1
msr ERXPFGCDN_EL1, x0
/* Start count down to generate error */
orr x2, x2, #ERXPFGCTL_CDEN_BIT
msr ERXPFGCTL_EL1, x2
isb
cbz x3, 2f
/* Clear SError received flag */
str xzr, [x3, #0]
sevl
1:
wfe
ldr x0, [x3, #0]
cbz x0, 1b
2:
ret
endfunc inject_serror_record
/*
* Inject Unrecoverable error through fault record 0. Wait until serror_received
* is set by the SDEI handler in response to receving the event.
*/
func inject_serror
/* Inject fault into record 0 */
mov x0, #0
/* Enable error reporting */
mov x1, #ERXCTLR_UE_BIT
msr ERXCTLR_EL1, x1
/* Injected fault control */
mov x2, #ERXPFGCTL_UEU_BIT
/* Wait address */
adrp x3, serror_received
add x3, x3, :lo12:serror_received
b inject_serror_record
endfunc inject_serror
/*
* Inject Uncontainable error through fault record 0. This function doesn't wait
* as the handling is terminal in EL3.
*/
func inject_uncontainable
/* Inject fault into record 0 */
mov x0, #0
mov x1, xzr
/* Injected fault control */
mov x2, #ERXPFGCTL_UC_BIT
/* Nothing to wait for */
mov x3, xzr
b inject_serror_record
endfunc inject_uncontainable
/*
* SDEI event handler for SErrors.
*/
func serror_sdei_event_handler
stp x29, x30, [sp, #-16]!
bl serror_handler
ldp x29, x30, [sp], #16
mov_imm x0, SDEI_EVENT_COMPLETE
mov x1, xzr
smc #0
b .
endfunc serror_sdei_event_handler
#endif
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