include/arch/xtensa/exc.h

/*
 * Copyright (c) 2014 Wind River Systems, Inc.
 * Copyright (c) 2016 Cadence Design Systems, Inc.
 * SPDX-License-Identifier: Apache-2.0
 */

/**
 * @file
 * @brief Xtensa public exception handling
 *
 * Xtensa-specific kernel exception handling interface. Included by
 * arch/xtensa/arch.h.
 */

#ifndef ZEPHYR_INCLUDE_ARCH_XTENSA_EXC_H_
#define ZEPHYR_INCLUDE_ARCH_XTENSA_EXC_H_

#ifdef __cplusplus
extern "C" {
#endif

#ifndef _ASMLANGUAGE
/**
 * @brief Exception Stack Frame
 *
 * A pointer to an "exception stack frame" (ESF) is passed as an argument
 * to exception handlers registered via nanoCpuExcConnect().
 */
struct __esf {
	/* FIXME - not finished yet */
	sys_define_gpr_with_alias(a1, sp);
	u32_t pc;
};

/* Xtensa uses a variable length stack frame depending on how many
 * register windows are in use.  This isn't a struct type, it just
 * matches the register/stack-unit width.
 */
typedef int z_arch_esf_t;

void z_xtensa_dump_stack(const z_arch_esf_t *stack);
char *z_xtensa_exccause(unsigned int cause_code);

#endif

#ifdef __cplusplus
}
#endif


#endif /* ZEPHYR_INCLUDE_ARCH_XTENSA_EXC_H_ */