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arm-trusted-firmware/include/lib/aarch64/arch_helpers.h
Soby Mathew a43d431b80 Rework BL3-1 unhandled exception handling and reporting 
This patch implements the register reporting when unhandled exceptions are
taken in BL3-1. Unhandled exceptions will result in a dump of registers
to the console, before halting execution by that CPU. The Crash Stack,
previously called the Exception Stack, is used for this activity.
This stack is used to preserve the CPU context and runtime stack
contents for debugging and analysis.

This also introduces the per_cpu_ptr_cache, referenced by tpidr_el3,
to provide easy access to some of BL3-1 per-cpu data structures.
Initially, this is used to provide a pointer to the Crash stack.

panic() now prints the the error file and line number in Debug mode
and prints the PC value in release mode.

The Exception Stack is renamed to Crash Stack with this patch.
The original intention of exception stack is no longer valid
since we intend to support several valid exceptions like IRQ
and FIQ in the trusted firmware context. This stack is now
utilized for dumping and reporting the system state when a
crash happens and hence the rename.

Fixes ARM-software/tf-issues#79 Improve reporting of unhandled exception

Change-Id: I260791dc05536b78547412d147193cdccae7811a
2014-05-16 14:51:00 +01:00

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/*
* Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of ARM nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __ARCH_HELPERS_H__
#define __ARCH_HELPERS_H__
#include <cdefs.h> /* For __dead2 */
/*******************************************************************************
* Aarch64 translation tables manipulation helper prototypes
******************************************************************************/
extern unsigned long create_table_desc(unsigned long *next_table_ptr);
extern unsigned long create_block_desc(unsigned long desc,
unsigned long addr,
unsigned int level);
extern unsigned long create_device_block(unsigned long output_addr,
unsigned int level,
unsigned int ns);
extern unsigned long create_romem_block(unsigned long output_addr,
unsigned int level,
unsigned int ns);
extern unsigned long create_rwmem_block(unsigned long output_addr,
unsigned int level,
unsigned int ns);
/*******************************************************************************
* TLB maintenance accessor prototypes
******************************************************************************/
extern void tlbialle1(void);
extern void tlbialle1is(void);
extern void tlbialle2(void);
extern void tlbialle2is(void);
extern void tlbialle3(void);
extern void tlbialle3is(void);
extern void tlbivmalle1(void);
/*******************************************************************************
* Cache maintenance accessor prototypes
******************************************************************************/
extern void dcisw(unsigned long);
extern void dccisw(unsigned long);
extern void dccsw(unsigned long);
extern void dccvac(unsigned long);
extern void dcivac(unsigned long);
extern void dccivac(unsigned long);
extern void dccvau(unsigned long);
extern void dczva(unsigned long);
extern void flush_dcache_range(unsigned long, unsigned long);
extern void inv_dcache_range(unsigned long, unsigned long);
extern void dcsw_op_louis(unsigned int);
extern void dcsw_op_all(unsigned int);
extern void disable_mmu_el3(void);
extern void disable_mmu_icache_el3(void);
/*******************************************************************************
* Misc. accessor prototypes
******************************************************************************/
extern void enable_irq(void);
extern void enable_fiq(void);
extern void enable_serror(void);
extern void enable_debug_exceptions(void);
extern void disable_irq(void);
extern void disable_fiq(void);
extern void disable_serror(void);
extern void disable_debug_exceptions(void);
extern unsigned long read_id_pfr1_el1(void);
extern unsigned long read_id_aa64pfr0_el1(void);
extern unsigned long read_current_el(void);
extern unsigned long read_daif(void);
extern unsigned long read_spsr_el1(void);
extern unsigned long read_spsr_el2(void);
extern unsigned long read_spsr_el3(void);
extern unsigned long read_elr_el1(void);
extern unsigned long read_elr_el2(void);
extern unsigned long read_elr_el3(void);
extern void write_daif(unsigned long);
extern void write_spsr_el1(unsigned long);
extern void write_spsr_el2(unsigned long);
extern void write_spsr_el3(unsigned long);
extern void write_elr_el1(unsigned long);
extern void write_elr_el2(unsigned long);
extern void write_elr_el3(unsigned long);
extern void wfi(void);
extern void wfe(void);
extern void rfe(void);
extern void sev(void);
extern void dsb(void);
extern void isb(void);
extern unsigned int get_afflvl_shift(unsigned int);
extern unsigned int mpidr_mask_lower_afflvls(unsigned long, unsigned int);
extern void __dead2 eret(unsigned long, unsigned long,
unsigned long, unsigned long,
unsigned long, unsigned long,
unsigned long, unsigned long);
extern void __dead2 smc(unsigned long, unsigned long,
unsigned long, unsigned long,
unsigned long, unsigned long,
unsigned long, unsigned long);
/*******************************************************************************
* System register accessor prototypes
******************************************************************************/
extern unsigned long read_midr(void);
extern unsigned long read_mpidr(void);
extern unsigned long read_scr(void);
extern unsigned long read_hcr(void);
extern unsigned long read_vbar_el1(void);
extern unsigned long read_vbar_el2(void);
extern unsigned long read_vbar_el3(void);
extern unsigned long read_sctlr_el1(void);
extern unsigned long read_sctlr_el2(void);
extern unsigned long read_sctlr_el3(void);
extern unsigned long read_actlr_el1(void);
extern unsigned long read_actlr_el2(void);
extern unsigned long read_actlr_el3(void);
extern unsigned long read_esr_el1(void);
extern unsigned long read_esr_el2(void);
extern unsigned long read_esr_el3(void);
extern unsigned long read_afsr0_el1(void);
extern unsigned long read_afsr0_el2(void);
extern unsigned long read_afsr0_el3(void);
extern unsigned long read_afsr1_el1(void);
extern unsigned long read_afsr1_el2(void);
extern unsigned long read_afsr1_el3(void);
extern unsigned long read_far_el1(void);
extern unsigned long read_far_el2(void);
extern unsigned long read_far_el3(void);
extern unsigned long read_mair_el1(void);
extern unsigned long read_mair_el2(void);
extern unsigned long read_mair_el3(void);
extern unsigned long read_amair_el1(void);
extern unsigned long read_amair_el2(void);
extern unsigned long read_amair_el3(void);
extern unsigned long read_rvbar_el1(void);
extern unsigned long read_rvbar_el2(void);
extern unsigned long read_rvbar_el3(void);
extern unsigned long read_rmr_el1(void);
extern unsigned long read_rmr_el2(void);
extern unsigned long read_rmr_el3(void);
extern unsigned long read_tcr_el1(void);
extern unsigned long read_tcr_el2(void);
extern unsigned long read_tcr_el3(void);
extern unsigned long read_ttbr0_el1(void);
extern unsigned long read_ttbr0_el2(void);
extern unsigned long read_ttbr0_el3(void);
extern unsigned long read_ttbr1_el1(void);
extern unsigned long read_cptr_el2(void);
extern unsigned long read_cptr_el3(void);
extern unsigned long read_cpacr(void);
extern unsigned long read_cpuectlr(void);
extern unsigned int read_cntfrq_el0(void);
extern unsigned long read_cnthctl_el2(void);
extern unsigned long read_tpidr_el3(void);
extern void write_scr(unsigned long);
extern void write_hcr(unsigned long);
extern void write_cpacr(unsigned long);
extern void write_cntfrq_el0(unsigned int);
extern void write_cnthctl_el2(unsigned long);
extern void write_vbar_el1(unsigned long);
extern void write_vbar_el2(unsigned long);
extern void write_vbar_el3(unsigned long);
extern void write_sctlr_el1(unsigned long);
extern void write_sctlr_el2(unsigned long);
extern void write_sctlr_el3(unsigned long);
extern void write_actlr_el1(unsigned long);
extern void write_actlr_el2(unsigned long);
extern void write_actlr_el3(unsigned long);
extern void write_esr_el1(unsigned long);
extern void write_esr_el2(unsigned long);
extern void write_esr_el3(unsigned long);
extern void write_afsr0_el1(unsigned long);
extern void write_afsr0_el2(unsigned long);
extern void write_afsr0_el3(unsigned long);
extern void write_afsr1_el1(unsigned long);
extern void write_afsr1_el2(unsigned long);
extern void write_afsr1_el3(unsigned long);
extern void write_far_el1(unsigned long);
extern void write_far_el2(unsigned long);
extern void write_far_el3(unsigned long);
extern void write_mair_el1(unsigned long);
extern void write_mair_el2(unsigned long);
extern void write_mair_el3(unsigned long);
extern void write_amair_el1(unsigned long);
extern void write_amair_el2(unsigned long);
extern void write_amair_el3(unsigned long);
extern void write_rmr_el1(unsigned long);
extern void write_rmr_el2(unsigned long);
extern void write_rmr_el3(unsigned long);
extern void write_tcr_el1(unsigned long);
extern void write_tcr_el2(unsigned long);
extern void write_tcr_el3(unsigned long);
extern void write_ttbr0_el1(unsigned long);
extern void write_ttbr0_el2(unsigned long);
extern void write_ttbr0_el3(unsigned long);
extern void write_ttbr1_el1(unsigned long);
extern void write_cpuectlr(unsigned long);
extern void write_cptr_el2(unsigned long);
extern void write_cptr_el3(unsigned long);
extern void write_tpidr_el3(unsigned long);
#define IS_IN_EL(x) \
(GET_EL(read_current_el()) == MODE_EL##x)
#define IS_IN_EL1() IS_IN_EL(1)
#define IS_IN_EL3() IS_IN_EL(3)
#endif /* __ARCH_HELPERS_H__ */
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