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https://github.com/ARM-software/arm-trusted-firmware.git
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eaeaa4d048
External Aborts while executing in EL3 is fatal in nature. This patch allows for the platform to define a handler for External Aborts received while executing in EL3. A default implementation is added which falls back to platform unhandled exception. Change-Id: I466f2c8113a33870f2c7d2d8f2bf20437d9fd354 Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>
223 lines
6.6 KiB
ArmAsm
223 lines
6.6 KiB
ArmAsm
/*
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* Copyright (c) 2013-2018, 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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#include <arch.h>
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#include <asm_macros.S>
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#include <console.h>
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#include <platform_def.h>
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.weak plat_report_exception
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.weak plat_crash_console_init
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.weak plat_crash_console_putc
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.weak plat_crash_console_flush
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.weak plat_reset_handler
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.weak plat_disable_acp
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.weak bl1_plat_prepare_exit
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.weak plat_panic_handler
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.weak bl31_plat_enable_mmu
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.weak bl32_plat_enable_mmu
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.weak plat_handle_uncontainable_ea
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.weak plat_handle_double_fault
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.weak plat_handle_el3_ea
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#if !ENABLE_PLAT_COMPAT
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.globl platform_get_core_pos
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#define MPIDR_RES_BIT_MASK 0xff000000
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/* ------------------------------------------------------------------
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* int platform_get_core_pos(int mpidr)
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* Returns the CPU index of the CPU specified by mpidr. This is
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* defined when platform compatibility is disabled to enable Trusted
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* Firmware components like SPD using the old platform API to work.
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* This API is deprecated and it assumes that the mpidr specified is
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* that of a valid and present CPU. Instead, plat_my_core_pos()
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* should be used for CPU index of the current CPU and
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* plat_core_pos_by_mpidr() should be used for CPU index of a
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* CPU specified by its mpidr.
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* ------------------------------------------------------------------
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*/
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func_deprecated platform_get_core_pos
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bic x0, x0, #MPIDR_RES_BIT_MASK
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mrs x1, mpidr_el1
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bic x1, x1, #MPIDR_RES_BIT_MASK
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cmp x0, x1
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beq plat_my_core_pos
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b platform_core_pos_helper
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endfunc_deprecated platform_get_core_pos
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#endif
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/* -----------------------------------------------------
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* Placeholder function which should be redefined by
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* each platform.
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* -----------------------------------------------------
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*/
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func plat_report_exception
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ret
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endfunc plat_report_exception
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#if MULTI_CONSOLE_API
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/* -----------------------------------------------------
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* int plat_crash_console_init(void)
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* Use normal console by default. Switch it to crash
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* mode so serial consoles become active again.
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* NOTE: This default implementation will only work for
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* crashes that occur after a normal console (marked
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* valid for the crash state) has been registered with
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* the console framework. To debug crashes that occur
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* earlier, the platform has to override these functions
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* with an implementation that initializes a console
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* driver with hardcoded parameters. See
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* docs/porting-guide.rst for more information.
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* -----------------------------------------------------
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*/
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func plat_crash_console_init
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#if defined(IMAGE_BL1)
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/*
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* BL1 code can possibly crash so early that the data segment is not yet
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* accessible. Don't risk undefined behavior by trying to run the normal
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* console framework. Platforms that want to debug BL1 will need to
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* override this with custom functions that can run from registers only.
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*/
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mov x0, #0
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ret
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#else /* IMAGE_BL1 */
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mov x3, x30
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mov x0, #CONSOLE_FLAG_CRASH
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bl console_switch_state
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mov x0, #1
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ret x3
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#endif
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endfunc plat_crash_console_init
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/* -----------------------------------------------------
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* void plat_crash_console_putc(int character)
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* Output through the normal console by default.
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* -----------------------------------------------------
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*/
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func plat_crash_console_putc
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b console_putc
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endfunc plat_crash_console_putc
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/* -----------------------------------------------------
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* void plat_crash_console_flush(void)
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* Flush normal console by default.
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* -----------------------------------------------------
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*/
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func plat_crash_console_flush
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b console_flush
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endfunc plat_crash_console_flush
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#else /* MULTI_CONSOLE_API */
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/* -----------------------------------------------------
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* In the old API these are all no-op stubs that need to
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* be overridden by the platform to be useful.
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* -----------------------------------------------------
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*/
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func plat_crash_console_init
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mov x0, #0
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ret
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endfunc plat_crash_console_init
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func plat_crash_console_putc
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ret
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endfunc plat_crash_console_putc
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func plat_crash_console_flush
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ret
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endfunc plat_crash_console_flush
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#endif
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/* -----------------------------------------------------
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* Placeholder function which should be redefined by
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* each platform. This function should preserve x19 - x29.
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* -----------------------------------------------------
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*/
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func plat_reset_handler
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ret
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endfunc plat_reset_handler
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/* -----------------------------------------------------
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* Placeholder function which should be redefined by
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* each platform. This function is allowed to use
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* registers x0 - x17.
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* -----------------------------------------------------
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*/
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func plat_disable_acp
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ret
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endfunc plat_disable_acp
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/* -----------------------------------------------------
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* void bl1_plat_prepare_exit(entry_point_info_t *ep_info);
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* Called before exiting BL1. Default: do nothing
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* -----------------------------------------------------
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*/
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func bl1_plat_prepare_exit
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ret
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endfunc bl1_plat_prepare_exit
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/* -----------------------------------------------------
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* void plat_panic_handler(void) __dead2;
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* Endless loop by default.
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* -----------------------------------------------------
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*/
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func plat_panic_handler
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wfi
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b plat_panic_handler
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endfunc plat_panic_handler
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/* -----------------------------------------------------
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* void bl31_plat_enable_mmu(uint32_t flags);
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*
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* Enable MMU in BL31.
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* -----------------------------------------------------
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*/
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func bl31_plat_enable_mmu
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b enable_mmu_direct_el3
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endfunc bl31_plat_enable_mmu
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/* -----------------------------------------------------
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* void bl32_plat_enable_mmu(uint32_t flags);
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*
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* Enable MMU in BL32.
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* -----------------------------------------------------
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*/
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func bl32_plat_enable_mmu
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b enable_mmu_direct_el1
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endfunc bl32_plat_enable_mmu
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/* -----------------------------------------------------
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* Platform handler for Uncontainable External Abort.
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*
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* x0: EA reason
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* x1: EA syndrome
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* -----------------------------------------------------
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*/
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func plat_handle_uncontainable_ea
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b report_unhandled_exception
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endfunc plat_handle_uncontainable_ea
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/* -----------------------------------------------------
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* Platform handler for Double Fault.
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*
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* x0: EA reason
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* x1: EA syndrome
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* -----------------------------------------------------
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*/
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func plat_handle_double_fault
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b report_unhandled_exception
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endfunc plat_handle_double_fault
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/* -----------------------------------------------------
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* Platform handler for EL3 External Abort.
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* -----------------------------------------------------
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*/
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func plat_handle_el3_ea
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b report_unhandled_exception
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endfunc plat_handle_el3_ea
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