gdbstub.h

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/*
 * Copyright (c) 2023 Marek Vedral <[email protected]>
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef ZEPHYR_INCLUDE_ARCH_ARM_AARCH32_GDBSTUB_H_
#define ZEPHYR_INCLUDE_ARCH_ARM_AARCH32_GDBSTUB_H_
 
#include <zephyr/arch/arm/exc.h>
 
#ifndef _ASMLANGUAGE
 
#define DBGDSCR_MONITOR_MODE_EN 0x8000
 
#define SPSR_ISETSTATE_ARM 0x0
#define SPSR_ISETSTATE_JAZELLE 0x2
#define SPSR_J 24
#define SPSR_T 5
 
/* Debug Breakpoint Control Register constants */
#define DBGDBCR_MEANING_MASK 0x7
#define DBGDBCR_MEANING_SHIFT 20
#define DBGDBCR_MEANING_ADDR_MISMATCH 0x4
#define DBGDBCR_BYTE_ADDR_MASK 0xF
#define DBGDBCR_BYTE_ADDR_SHIFT 5
#define DBGDBCR_BRK_EN_MASK 0x1
 
/* Regno of the SPSR */
#define SPSR_REG_IDX 25
/* Minimal size of the packet - SPSR is the last, 42-nd byte, see packet_pos array */
#define GDB_READALL_PACKET_SIZE (42 * 8)
 
#define IFSR_DEBUG_EVENT 0x2
 
enum AARCH32_GDB_REG {
 R0 = 0,
 R1,
 R2,
 R3,
 /* READONLY registers (R4 - R13) except R12 */
 R4,
 R5,
 R6,
 R7,
 R8,
 R9,
 R10,
 R11,
 R12,
 /* Stack pointer - READONLY */
 R13,
 LR,
 PC,
 /* Saved program status register */
 SPSR,
 GDB_NUM_REGS
};
 
/* required structure */
struct gdb_ctx {
 /* cause of the exception */
 unsigned int exception;
 unsigned int registers[GDB_NUM_REGS];
};
 
void z_gdb_entry(z_arch_esf_t *esf, unsigned int exc_cause);
 
#endif
 
#endif