exception.h

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/*
 * Copyright (c) 2013-2014 Wind River Systems, Inc.
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef ZEPHYR_INCLUDE_ARCH_ARM_CORTEX_A_R_EXCEPTION_H_
#define ZEPHYR_INCLUDE_ARCH_ARM_CORTEX_A_R_EXCEPTION_H_
 
#ifdef _ASMLANGUAGE
GTEXT(z_arm_exc_exit);
#else
#include <zephyr/types.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#if defined(CONFIG_FPU) && defined(CONFIG_FPU_SHARING)
 
/* Registers s16-s31 (d8-d15, q4-q7) must be preserved across subroutine calls.
 *
 * Registers s0-s15 (d0-d7, q0-q3) do not have to be preserved (and can be used
 * for passing arguments or returning results in standard procedure-call variants).
 *
 * Registers d16-d31 (q8-q15), do not have to be preserved.
 */
struct __fpu_sf {
        uint32_t s[16]; /* s0~s15 (d0-d7) */
#ifdef CONFIG_VFP_FEATURE_REGS_S64_D32
        uint64_t d[16]; /* d16~d31 */
#endif
        uint32_t fpscr;
        uint32_t undefined;
};
#endif
 
/* Additional register state that is not stacked by hardware on exception
 * entry.
 *
 * These fields are ONLY valid in the ESF copy passed into z_arm_fatal_error().
 * When information for a member is unavailable, the field is set to zero.
 */
#if defined(CONFIG_EXTRA_EXCEPTION_INFO)
struct __extra_esf_info {
        _callee_saved_t *callee;
        uint32_t msp;
        uint32_t exc_return;
};
#endif /* CONFIG_EXTRA_EXCEPTION_INFO */
 
/* ARM GPRs are often designated by two different names */
#define sys_define_gpr_with_alias(name1, name2) union { uint32_t name1, name2; }
 
struct arch_esf {
#if defined(CONFIG_EXTRA_EXCEPTION_INFO)
        struct __extra_esf_info extra_info;
#endif
#if defined(CONFIG_FPU) && defined(CONFIG_FPU_SHARING)
        struct __fpu_sf fpu;
#endif
        struct __basic_sf {
                sys_define_gpr_with_alias(a1, r0);
                sys_define_gpr_with_alias(a2, r1);
                sys_define_gpr_with_alias(a3, r2);
                sys_define_gpr_with_alias(a4, r3);
                sys_define_gpr_with_alias(ip, r12);
                sys_define_gpr_with_alias(lr, r14);
                sys_define_gpr_with_alias(pc, r15);
                uint32_t xpsr;
        } basic;
};
 
extern uint32_t z_arm_coredump_fault_sp;
 
extern void z_arm_exc_exit(bool fatal);
 
#ifdef __cplusplus
}
#endif
 
#endif /* _ASMLANGUAGE */
 
#endif /* ZEPHYR_INCLUDE_ARCH_ARM_CORTEX_A_R_EXCEPTION_H_ */