[mirror_qemu.git] / target / lm32 / cpu.h

/*
 *  LatticeMico32 virtual CPU header.
 *
 *  Copyright (c) 2010 Michael Walle <michael@walle.cc>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */

#ifndef LM32_CPU_H
#define LM32_CPU_H

#define TARGET_LONG_BITS 32

#define CPUArchState struct CPULM32State

#include "qemu-common.h"
#include "cpu-qom.h"
#include "exec/cpu-defs.h"
struct CPULM32State;
typedef struct CPULM32State CPULM32State;

#define NB_MMU_MODES 1
#define TARGET_PAGE_BITS 12
static inline int cpu_mmu_index(CPULM32State *env, bool ifetch)
{
    return 0;
}

#define TARGET_PHYS_ADDR_SPACE_BITS 32
#define TARGET_VIRT_ADDR_SPACE_BITS 32

/* Exceptions indices */
enum {
    EXCP_RESET = 0,
    EXCP_BREAKPOINT,
    EXCP_INSN_BUS_ERROR,
    EXCP_WATCHPOINT,
    EXCP_DATA_BUS_ERROR,
    EXCP_DIVIDE_BY_ZERO,
    EXCP_IRQ,
    EXCP_SYSTEMCALL
};

/* Registers */
enum {
    R_R0 = 0, R_R1, R_R2, R_R3, R_R4, R_R5, R_R6, R_R7, R_R8, R_R9, R_R10,
    R_R11, R_R12, R_R13, R_R14, R_R15, R_R16, R_R17, R_R18, R_R19, R_R20,
    R_R21, R_R22, R_R23, R_R24, R_R25, R_R26, R_R27, R_R28, R_R29, R_R30,
    R_R31
};

/* Register aliases */
enum {
    R_GP = R_R26,
    R_FP = R_R27,
    R_SP = R_R28,
    R_RA = R_R29,
    R_EA = R_R30,
    R_BA = R_R31
};

/* IE flags */
enum {
    IE_IE  = (1<<0),
    IE_EIE = (1<<1),
    IE_BIE = (1<<2),
};

/* DC flags */
enum {
    DC_SS  = (1<<0),
    DC_RE  = (1<<1),
    DC_C0  = (1<<2),
    DC_C1  = (1<<3),
    DC_C2  = (1<<4),
    DC_C3  = (1<<5),
};

/* CFG mask */
enum {
    CFG_M         = (1<<0),
    CFG_D         = (1<<1),
    CFG_S         = (1<<2),
    CFG_U         = (1<<3),
    CFG_X         = (1<<4),
    CFG_CC        = (1<<5),
    CFG_IC        = (1<<6),
    CFG_DC        = (1<<7),
    CFG_G         = (1<<8),
    CFG_H         = (1<<9),
    CFG_R         = (1<<10),
    CFG_J         = (1<<11),
    CFG_INT_SHIFT = 12,
    CFG_BP_SHIFT  = 18,
    CFG_WP_SHIFT  = 22,
    CFG_REV_SHIFT = 26,
};

/* CSRs */
enum {
    CSR_IE   = 0x00,
    CSR_IM   = 0x01,
    CSR_IP   = 0x02,
    CSR_ICC  = 0x03,
    CSR_DCC  = 0x04,
    CSR_CC   = 0x05,
    CSR_CFG  = 0x06,
    CSR_EBA  = 0x07,
    CSR_DC   = 0x08,
    CSR_DEBA = 0x09,
    CSR_JTX  = 0x0e,
    CSR_JRX  = 0x0f,
    CSR_BP0  = 0x10,
    CSR_BP1  = 0x11,
    CSR_BP2  = 0x12,
    CSR_BP3  = 0x13,
    CSR_WP0  = 0x18,
    CSR_WP1  = 0x19,
    CSR_WP2  = 0x1a,
    CSR_WP3  = 0x1b,
};

enum {
    LM32_FEATURE_MULTIPLY     =  1,
    LM32_FEATURE_DIVIDE       =  2,
    LM32_FEATURE_SHIFT        =  4,
    LM32_FEATURE_SIGN_EXTEND  =  8,
    LM32_FEATURE_I_CACHE      = 16,
    LM32_FEATURE_D_CACHE      = 32,
    LM32_FEATURE_CYCLE_COUNT  = 64,
};

enum {
    LM32_FLAG_IGNORE_MSB = 1,
};

struct CPULM32State {
    /* general registers */
    uint32_t regs[32];

    /* special registers */
    uint32_t pc;        /* program counter */
    uint32_t ie;        /* interrupt enable */
    uint32_t icc;       /* instruction cache control */
    uint32_t dcc;       /* data cache control */
    uint32_t cc;        /* cycle counter */
    uint32_t cfg;       /* configuration */

    /* debug registers */
    uint32_t dc;        /* debug control */
    uint32_t bp[4];     /* breakpoints */
    uint32_t wp[4];     /* watchpoints */

    struct CPUBreakpoint *cpu_breakpoint[4];
    struct CPUWatchpoint *cpu_watchpoint[4];

    CPU_COMMON

    /* Fields from here on are preserved across CPU reset. */
    uint32_t eba;       /* exception base address */
    uint32_t deba;      /* debug exception base address */

    /* interrupt controller handle for callbacks */
    DeviceState *pic_state;
    /* JTAG UART handle for callbacks */
    DeviceState *juart_state;

    /* processor core features */
    uint32_t flags;

};

/**
 * LM32CPU:
 * @env: #CPULM32State
 *
 * A LatticeMico32 CPU.
 */
struct LM32CPU {
    /*< private >*/
    CPUState parent_obj;
    /*< public >*/

    CPULM32State env;

    uint32_t revision;
    uint8_t num_interrupts;
    uint8_t num_breakpoints;
    uint8_t num_watchpoints;
    uint32_t features;
};

static inline LM32CPU *lm32_env_get_cpu(CPULM32State *env)
{
    return container_of(env, LM32CPU, env);
}

#define ENV_GET_CPU(e) CPU(lm32_env_get_cpu(e))

#define ENV_OFFSET offsetof(LM32CPU, env)

#ifndef CONFIG_USER_ONLY
extern const struct VMStateDescription vmstate_lm32_cpu;
#endif

void lm32_cpu_do_interrupt(CPUState *cpu);
bool lm32_cpu_exec_interrupt(CPUState *cs, int int_req);
void lm32_cpu_dump_state(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
                         int flags);
hwaddr lm32_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
int lm32_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg);
int lm32_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);

typedef enum {
    LM32_WP_DISABLED = 0,
    LM32_WP_READ,
    LM32_WP_WRITE,
    LM32_WP_READ_WRITE,
} lm32_wp_t;

static inline lm32_wp_t lm32_wp_type(uint32_t dc, int idx)
{
    assert(idx < 4);
    return (dc >> (idx+1)*2) & 0x3;
}

LM32CPU *cpu_lm32_init(const char *cpu_model);
/* you can call this signal handler from your SIGBUS and SIGSEGV
   signal handlers to inform the virtual CPU of exceptions. non zero
   is returned if the signal was handled by the virtual CPU.  */
int cpu_lm32_signal_handler(int host_signum, void *pinfo,
                          void *puc);
void lm32_cpu_list(FILE *f, fprintf_function cpu_fprintf);
void lm32_translate_init(void);
void cpu_lm32_set_phys_msb_ignore(CPULM32State *env, int value);
void QEMU_NORETURN raise_exception(CPULM32State *env, int index);
void lm32_debug_excp_handler(CPUState *cs);
void lm32_breakpoint_insert(CPULM32State *env, int index, target_ulong address);
void lm32_breakpoint_remove(CPULM32State *env, int index);
void lm32_watchpoint_insert(CPULM32State *env, int index, target_ulong address,
        lm32_wp_t wp_type);
void lm32_watchpoint_remove(CPULM32State *env, int index);
bool lm32_cpu_do_semihosting(CPUState *cs);

#define cpu_init(cpu_model) CPU(cpu_lm32_init(cpu_model))

#define cpu_list lm32_cpu_list
#define cpu_signal_handler cpu_lm32_signal_handler

int lm32_cpu_handle_mmu_fault(CPUState *cpu, vaddr address, int rw,
                              int mmu_idx);

#include "exec/cpu-all.h"

static inline void cpu_get_tb_cpu_state(CPULM32State *env, target_ulong *pc,
                                        target_ulong *cs_base, uint32_t *flags)
{
    *pc = env->pc;
    *cs_base = 0;
    *flags = 0;
}

#endif
Commit	Line	Data
81ea0e13 MW	1	/*
	2	* LatticeMico32 virtual CPU header.
	3	*
	4	* Copyright (c) 2010 Michael Walle <michael@walle.cc>
	5	*
	6	* This library is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU Lesser General Public
	8	* License as published by the Free Software Foundation; either
	9	* version 2 of the License, or (at your option) any later version.
	10	*
	11	* This library is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* Lesser General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU Lesser General Public
	17	* License along with this library; if not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
07f5a258 MA	20	#ifndef LM32_CPU_H
07f5a258 MA	21	#define LM32_CPU_H
81ea0e13 MW	22
	23	#define TARGET_LONG_BITS 32
	24
9349b4f9	25	#define CPUArchState struct CPULM32State
81ea0e13 MW	26
81ea0e13 MW	27	#include "qemu-common.h"
6adb9c54	28	#include "cpu-qom.h"
022c62cb	29	#include "exec/cpu-defs.h"
81ea0e13	30	struct CPULM32State;
9b9a970a	31	typedef struct CPULM32State CPULM32State;
81ea0e13	32
81ea0e13 MW	33	#define NB_MMU_MODES 1
81ea0e13 MW	34	#define TARGET_PAGE_BITS 12
97ed5ccd	35	static inline int cpu_mmu_index(CPULM32State *env, bool ifetch)
81ea0e13 MW	36	{
	37	return 0;
	38	}
	39
	40	#define TARGET_PHYS_ADDR_SPACE_BITS 32
	41	#define TARGET_VIRT_ADDR_SPACE_BITS 32
	42
	43	/* Exceptions indices */
	44	enum {
	45	EXCP_RESET = 0,
	46	EXCP_BREAKPOINT,
	47	EXCP_INSN_BUS_ERROR,
	48	EXCP_WATCHPOINT,
	49	EXCP_DATA_BUS_ERROR,
	50	EXCP_DIVIDE_BY_ZERO,
	51	EXCP_IRQ,
	52	EXCP_SYSTEMCALL
	53	};
	54
	55	/* Registers */
	56	enum {
	57	R_R0 = 0, R_R1, R_R2, R_R3, R_R4, R_R5, R_R6, R_R7, R_R8, R_R9, R_R10,
	58	R_R11, R_R12, R_R13, R_R14, R_R15, R_R16, R_R17, R_R18, R_R19, R_R20,
	59	R_R21, R_R22, R_R23, R_R24, R_R25, R_R26, R_R27, R_R28, R_R29, R_R30,
	60	R_R31
	61	};
	62
	63	/* Register aliases */
	64	enum {
	65	R_GP = R_R26,
	66	R_FP = R_R27,
	67	R_SP = R_R28,
	68	R_RA = R_R29,
	69	R_EA = R_R30,
	70	R_BA = R_R31
	71	};
	72
	73	/* IE flags */
	74	enum {
	75	IE_IE = (1<<0),
	76	IE_EIE = (1<<1),
	77	IE_BIE = (1<<2),
	78	};
	79
	80	/* DC flags */
	81	enum {
	82	DC_SS = (1<<0),
	83	DC_RE = (1<<1),
	84	DC_C0 = (1<<2),
	85	DC_C1 = (1<<3),
	86	DC_C2 = (1<<4),
	87	DC_C3 = (1<<5),
	88	};
	89
	90	/* CFG mask */
	91	enum {
	92	CFG_M = (1<<0),
	93	CFG_D = (1<<1),
	94	CFG_S = (1<<2),
	95	CFG_U = (1<<3),
	96	CFG_X = (1<<4),
	97	CFG_CC = (1<<5),
	98	CFG_IC = (1<<6),
	99	CFG_DC = (1<<7),
100	CFG_G = (1<<8),
101	CFG_H = (1<<9),
102	CFG_R = (1<<10),
103	CFG_J = (1<<11),
104	CFG_INT_SHIFT = 12,
105	CFG_BP_SHIFT = 18,
106	CFG_WP_SHIFT = 22,
107	CFG_REV_SHIFT = 26,
108	};
109
110	/* CSRs */
111	enum {
112	CSR_IE = 0x00,
113	CSR_IM = 0x01,
114	CSR_IP = 0x02,
115	CSR_ICC = 0x03,
116	CSR_DCC = 0x04,
117	CSR_CC = 0x05,
118	CSR_CFG = 0x06,
119	CSR_EBA = 0x07,
120	CSR_DC = 0x08,
121	CSR_DEBA = 0x09,
122	CSR_JTX = 0x0e,
123	CSR_JRX = 0x0f,
124	CSR_BP0 = 0x10,
125	CSR_BP1 = 0x11,
126	CSR_BP2 = 0x12,
127	CSR_BP3 = 0x13,
128	CSR_WP0 = 0x18,
129	CSR_WP1 = 0x19,
130	CSR_WP2 = 0x1a,
131	CSR_WP3 = 0x1b,
132	};
133
134	enum {
135	LM32_FEATURE_MULTIPLY = 1,
136	LM32_FEATURE_DIVIDE = 2,
137	LM32_FEATURE_SHIFT = 4,
138	LM32_FEATURE_SIGN_EXTEND = 8,
139	LM32_FEATURE_I_CACHE = 16,
140	LM32_FEATURE_D_CACHE = 32,
141	LM32_FEATURE_CYCLE_COUNT = 64,
142	};
143
144	enum {
145	LM32_FLAG_IGNORE_MSB = 1,
146	};
147
ae7d54d4	148	struct CPULM32State {
81ea0e13 MW	149	/* general registers */
	150	uint32_t regs[32];
	151
	152	/* special registers */
	153	uint32_t pc; /* program counter */
	154	uint32_t ie; /* interrupt enable */
	155	uint32_t icc; /* instruction cache control */
	156	uint32_t dcc; /* data cache control */
	157	uint32_t cc; /* cycle counter */
	158	uint32_t cfg; /* configuration */
	159
	160	/* debug registers */
	161	uint32_t dc; /* debug control */
3dd3a2b9 MW	162	uint32_t bp[4]; /* breakpoints */
	163	uint32_t wp[4]; /* watchpoints */
	164
f0c3c505	165	struct CPUBreakpoint *cpu_breakpoint[4];
ff4700b0	166	struct CPUWatchpoint *cpu_watchpoint[4];
81ea0e13 MW	167
	168	CPU_COMMON
	169
f0c3c505	170	/* Fields from here on are preserved across CPU reset. */
81ea0e13 MW	171	uint32_t eba; /* exception base address */
	172	uint32_t deba; /* debug exception base address */
	173
	174	/* interrupt controller handle for callbacks */
	175	DeviceState *pic_state;
	176	/* JTAG UART handle for callbacks */
	177	DeviceState *juart_state;
	178
	179	/* processor core features */
81ea0e13	180	uint32_t flags;
81ea0e13	181
ae7d54d4	182	};
81ea0e13	183
6adb9c54 PB	184	/**
	185	* LM32CPU:
	186	* @env: #CPULM32State
	187	*
	188	* A LatticeMico32 CPU.
	189	*/
	190	struct LM32CPU {
	191	/< private >/
	192	CPUState parent_obj;
	193	/< public >/
	194
	195	CPULM32State env;
	196
	197	uint32_t revision;
	198	uint8_t num_interrupts;
	199	uint8_t num_breakpoints;
	200	uint8_t num_watchpoints;
	201	uint32_t features;
	202	};
	203
	204	static inline LM32CPU lm32_env_get_cpu(CPULM32State env)
	205	{
	206	return container_of(env, LM32CPU, env);
	207	}
	208
	209	#define ENV_GET_CPU(e) CPU(lm32_env_get_cpu(e))
	210
	211	#define ENV_OFFSET offsetof(LM32CPU, env)
	212
	213	#ifndef CONFIG_USER_ONLY
	214	extern const struct VMStateDescription vmstate_lm32_cpu;
	215	#endif
	216
	217	void lm32_cpu_do_interrupt(CPUState *cpu);
	218	bool lm32_cpu_exec_interrupt(CPUState *cs, int int_req);
	219	void lm32_cpu_dump_state(CPUState cpu, FILE f, fprintf_function cpu_fprintf,
	220	int flags);
	221	hwaddr lm32_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
	222	int lm32_cpu_gdb_read_register(CPUState cpu, uint8_t buf, int reg);
	223	int lm32_cpu_gdb_write_register(CPUState cpu, uint8_t buf, int reg);
	224
3dd3a2b9 MW	225	typedef enum {
	226	LM32_WP_DISABLED = 0,
	227	LM32_WP_READ,
	228	LM32_WP_WRITE,
	229	LM32_WP_READ_WRITE,
	230	} lm32_wp_t;
	231
	232	static inline lm32_wp_t lm32_wp_type(uint32_t dc, int idx)
	233	{
	234	assert(idx < 4);
	235	return (dc >> (idx+1)*2) & 0x3;
	236	}
	237
0347d689	238	LM32CPU cpu_lm32_init(const char cpu_model);
81ea0e13 MW	239	/* you can call this signal handler from your SIGBUS and SIGSEGV
	240	signal handlers to inform the virtual CPU of exceptions. non zero
	241	is returned if the signal was handled by the virtual CPU. */
	242	int cpu_lm32_signal_handler(int host_signum, void *pinfo,
	243	void *puc);
34f4aa83	244	void lm32_cpu_list(FILE *f, fprintf_function cpu_fprintf);
81ea0e13	245	void lm32_translate_init(void);
6393c08d	246	void cpu_lm32_set_phys_msb_ignore(CPULM32State *env, int value);
3dd3a2b9	247	void QEMU_NORETURN raise_exception(CPULM32State *env, int index);
86025ee4	248	void lm32_debug_excp_handler(CPUState *cs);
3dd3a2b9 MW	249	void lm32_breakpoint_insert(CPULM32State *env, int index, target_ulong address);
	250	void lm32_breakpoint_remove(CPULM32State *env, int index);
	251	void lm32_watchpoint_insert(CPULM32State *env, int index, target_ulong address,
	252	lm32_wp_t wp_type);
	253	void lm32_watchpoint_remove(CPULM32State *env, int index);
f7bbcfb5	254	bool lm32_cpu_do_semihosting(CPUState *cs);
81ea0e13	255
2994fd96	256	#define cpu_init(cpu_model) CPU(cpu_lm32_init(cpu_model))
0347d689	257
34f4aa83	258	#define cpu_list lm32_cpu_list
81ea0e13 MW	259	#define cpu_signal_handler cpu_lm32_signal_handler
81ea0e13 MW	260
7510454e	261	int lm32_cpu_handle_mmu_fault(CPUState *cpu, vaddr address, int rw,
97b348e7	262	int mmu_idx);
81ea0e13	263
022c62cb	264	#include "exec/cpu-all.h"
81ea0e13	265
6393c08d	266	static inline void cpu_get_tb_cpu_state(CPULM32State env, target_ulong pc,
89fee74a	267	target_ulong cs_base, uint32_t flags)
81ea0e13 MW	268	{
	269	*pc = env->pc;
	270	*cs_base = 0;
	271	*flags = 0;
	272	}
f081c76c	273
81ea0e13	274	#endif