arm_dpm.h

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/* SPDX-License-Identifier: GPL-2.0-or-later */
 
/*
 * Copyright (C) 2009 by David Brownell
 */
 
#ifndef OPENOCD_TARGET_ARM_DPM_H
#define OPENOCD_TARGET_ARM_DPM_H
 
struct dpm_bpwp {
    unsigned number;
    uint32_t address;
    uint32_t control;
    /* true if hardware state needs flushing */
    bool dirty;
};
 
struct dpm_bp {
    struct breakpoint *bp;
    struct dpm_bpwp bpwp;
};
 
struct dpm_wp {
    struct watchpoint *wp;
    struct dpm_bpwp bpwp;
};
 
struct arm_dpm {
    struct arm *arm;
 
    uint64_t didr;
 
    int (*prepare)(struct arm_dpm *dpm);
 
    int (*finish)(struct arm_dpm *dpm);
 
    int (*instr_execute)(struct arm_dpm *dpm, uint32_t opcode);
 
    /* WRITE TO CPU */
 
    int (*instr_write_data_dcc)(struct arm_dpm *dpm,
            uint32_t opcode, uint32_t data);
 
    int (*instr_write_data_dcc_64)(struct arm_dpm *dpm,
            uint32_t opcode, uint64_t data);
 
    int (*instr_write_data_r0)(struct arm_dpm *dpm,
            uint32_t opcode, uint32_t data);
 
    int (*instr_write_data_r0_64)(struct arm_dpm *dpm,
            uint32_t opcode, uint64_t data);
 
    int (*instr_cpsr_sync)(struct arm_dpm *dpm);
 
    /* READ FROM CPU */
 
    int (*instr_read_data_dcc)(struct arm_dpm *dpm,
            uint32_t opcode, uint32_t *data);
 
    int (*instr_read_data_dcc_64)(struct arm_dpm *dpm,
            uint32_t opcode, uint64_t *data);
 
    int (*instr_read_data_r0)(struct arm_dpm *dpm,
            uint32_t opcode, uint32_t *data);
 
    int (*instr_read_data_r0_64)(struct arm_dpm *dpm,
            uint32_t opcode, uint64_t *data);
 
    struct reg *(*arm_reg_current)(struct arm *arm,
            unsigned regnum);
 
    /* BREAKPOINT/WATCHPOINT SUPPORT */
 
    int (*bpwp_enable)(struct arm_dpm *dpm, unsigned index_value,
            uint32_t addr, uint32_t control);
 
    int (*bpwp_disable)(struct arm_dpm *dpm, unsigned index_value);
 
    /* The breakpoint and watchpoint arrays are private to the
     * DPM infrastructure.  There are nbp indices in the dbp
     * array.  There are nwp indices in the dwp array.
     */
 
    unsigned nbp;
    unsigned nwp;
    struct dpm_bp *dbp;
    struct dpm_wp *dwp;
 
    target_addr_t wp_addr;
 
    uint32_t dscr;
 
    unsigned int last_el;
 
    /* FIXME -- read/write DCSR methods and symbols */
};
 
int arm_dpm_setup(struct arm_dpm *dpm);
int arm_dpm_initialize(struct arm_dpm *dpm);
 
int arm_dpm_read_reg(struct arm_dpm *dpm, struct reg *r, unsigned regnum);
int arm_dpm_read_current_registers(struct arm_dpm *dpm);
int arm_dpm_modeswitch(struct arm_dpm *dpm, enum arm_mode mode);
 
int arm_dpm_write_dirty_registers(struct arm_dpm *dpm, bool bpwp);
 
void arm_dpm_report_wfar(struct arm_dpm *dpm, uint32_t wfar);
 
/* DSCR bits; see ARMv7a arch spec section C10.3.1.
 * Not all v7 bits are valid in v6.
 */
#define DSCR_CORE_HALTED            (0x1 <<  0)
#define DSCR_CORE_RESTARTED         (0x1 <<  1)
#define DSCR_ENTRY_MASK             (0xF <<  2)
#define DSCR_STICKY_ABORT_PRECISE   (0x1 <<  6)
#define DSCR_STICKY_ABORT_IMPRECISE (0x1 <<  7)
#define DSCR_STICKY_UNDEFINED       (0x1 <<  8)
#define DSCR_DBG_NOPWRDWN           (0x1 <<  9) /* v6 only */
#define DSCR_DBG_ACK                (0x1 << 10)
#define DSCR_INT_DIS                (0x1 << 11)
#define DSCR_CP14_USR_COMMS         (0x1 << 12)
#define DSCR_ITR_EN                 (0x1 << 13)
#define DSCR_HALT_DBG_MODE          (0x1 << 14)
#define DSCR_MON_DBG_MODE           (0x1 << 15)
#define DSCR_SEC_PRIV_INVASV_DIS    (0x1 << 16)
#define DSCR_SEC_PRIV_NINVASV_DIS   (0x1 << 17)
#define DSCR_NON_SECURE             (0x1 << 18)
#define DSCR_DSCRD_IMPRECISE_ABORT  (0x1 << 19)
#define DSCR_EXT_DCC_MASK           (0x3 << 20) /* DTR mode */  /* bits 22, 23 are reserved */
#define DSCR_INSTR_COMP             (0x1 << 24)
#define DSCR_PIPE_ADVANCE           (0x1 << 25)
#define DSCR_DTRTX_FULL_LATCHED     (0x1 << 26)
#define DSCR_DTRRX_FULL_LATCHED     (0x1 << 27) /* bit 28 is reserved */
#define DSCR_DTR_TX_FULL            (0x1 << 29)
#define DSCR_DTR_RX_FULL            (0x1 << 30) /* bit 31 is reserved */
 
#define DSCR_ENTRY(dscr)            ((dscr) & 0x3f)
#define DSCR_RUN_MODE(dscr)         ((dscr) & 0x03)
 
 
/* Methods of entry into debug mode */
#define DSCR_ENTRY_HALT_REQ           (0x03)
#define DSCR_ENTRY_BREAKPOINT         (0x07)
#define DSCR_ENTRY_IMPRECISE_WATCHPT  (0x0B)
#define DSCR_ENTRY_BKPT_INSTR         (0x0F)
#define DSCR_ENTRY_EXT_DBG_REQ        (0x13)
#define DSCR_ENTRY_VECT_CATCH         (0x17)
#define DSCR_ENTRY_D_SIDE_ABORT       (0x1B)  /* v6 only */
#define DSCR_ENTRY_I_SIDE_ABORT       (0x1F)  /* v6 only */
#define DSCR_ENTRY_OS_UNLOCK          (0x23)
#define DSCR_ENTRY_PRECISE_WATCHPT    (0x2B)
 
/* DTR modes */
#define DSCR_EXT_DCC_NON_BLOCKING     (0x0 << 20)
#define DSCR_EXT_DCC_STALL_MODE       (0x1 << 20)
#define DSCR_EXT_DCC_FAST_MODE        (0x2 << 20)  /* bits 22, 23 are reserved */
 
 
 
 
 
/* DRCR (debug run control register) bits */
#define DRCR_HALT               (1 << 0)
#define DRCR_RESTART            (1 << 1)
#define DRCR_CLEAR_EXCEPTIONS   (1 << 2)
 
void arm_dpm_report_dscr(struct arm_dpm *dpm, uint32_t dcsr);
 
/* PRCR (Device Power-down and Reset Control Register) bits */
#define PRCR_DEBUG_NO_POWER_DOWN         (1 << 0)
#define PRCR_WARM_RESET                  (1 << 1)
#define PRCR_HOLD_NON_DEBUG_RESET        (1 << 2)
 
/* PRSR (Device Power-down and Reset Status Register) bits */
#define PRSR_POWERUP_STATUS              (1 << 0)
#define PRSR_STICKY_POWERDOWN_STATUS     (1 << 1)
#define PRSR_RESET_STATUS                (1 << 2)
#define PRSR_STICKY_RESET_STATUS         (1 << 3)
#define PRSR_HALTED                      (1 << 4)  /* v7.1 Debug only */
#define PRSR_OSLK                        (1 << 5)  /* v7.1 Debug only */
#define PRSR_DLK                         (1 << 6)  /* v7.1 Debug only */
 
/* OSLSR (OS Lock Status Register) bits */
#define OSLSR_OSLM0                      (1 << 0)
#define OSLSR_OSLK                       (1 << 1)
#define OSLSR_NTT                        (1 << 2)
#define OSLSR_OSLM1                      (1 << 3)
#define OSLSR_OSLM                       (OSLSR_OSLM0|OSLSR_OSLM1)
 
#endif /* OPENOCD_TARGET_ARM_DPM_H */