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Diffstat (limited to 'target/lm32/cpu.h')
| -rw-r--r-- | target/lm32/cpu.h | 274 |
1 files changed, 274 insertions, 0 deletions
diff --git a/target/lm32/cpu.h b/target/lm32/cpu.h new file mode 100644 index 0000000000..d8a3515244 --- /dev/null +++ b/target/lm32/cpu.h @@ -0,0 +1,274 @@ +/* + * 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 |