16bf436cfSPeter Maydell /* 26bf436cfSPeter Maydell * ARMv7M NVIC object 36bf436cfSPeter Maydell * 46bf436cfSPeter Maydell * Copyright (c) 2017 Linaro Ltd 56bf436cfSPeter Maydell * Written by Peter Maydell <peter.maydell@linaro.org> 66bf436cfSPeter Maydell * 76bf436cfSPeter Maydell * This code is licensed under the GPL version 2 or later. 86bf436cfSPeter Maydell */ 96bf436cfSPeter Maydell 106bf436cfSPeter Maydell #ifndef HW_ARM_ARMV7M_NVIC_H 116bf436cfSPeter Maydell #define HW_ARM_ARMV7M_NVIC_H 126bf436cfSPeter Maydell 136bf436cfSPeter Maydell #include "target/arm/cpu.h" 146bf436cfSPeter Maydell #include "hw/sysbus.h" 15ff68dacbSPeter Maydell #include "hw/timer/armv7m_systick.h" 166bf436cfSPeter Maydell 176bf436cfSPeter Maydell #define TYPE_NVIC "armv7m_nvic" 186bf436cfSPeter Maydell 196bf436cfSPeter Maydell #define NVIC(obj) \ 206bf436cfSPeter Maydell OBJECT_CHECK(NVICState, (obj), TYPE_NVIC) 216bf436cfSPeter Maydell 226bf436cfSPeter Maydell /* Highest permitted number of exceptions (architectural limit) */ 236bf436cfSPeter Maydell #define NVIC_MAX_VECTORS 512 2417906a16SPeter Maydell /* Number of internal exceptions */ 2517906a16SPeter Maydell #define NVIC_INTERNAL_VECTORS 16 266bf436cfSPeter Maydell 276bf436cfSPeter Maydell typedef struct VecInfo { 286bf436cfSPeter Maydell /* Exception priorities can range from -3 to 255; only the unmodifiable 296bf436cfSPeter Maydell * priority values for RESET, NMI and HardFault can be negative. 306bf436cfSPeter Maydell */ 316bf436cfSPeter Maydell int16_t prio; 326bf436cfSPeter Maydell uint8_t enabled; 336bf436cfSPeter Maydell uint8_t pending; 346bf436cfSPeter Maydell uint8_t active; 356bf436cfSPeter Maydell uint8_t level; /* exceptions <=15 never set level */ 366bf436cfSPeter Maydell } VecInfo; 376bf436cfSPeter Maydell 386bf436cfSPeter Maydell typedef struct NVICState { 396bf436cfSPeter Maydell /*< private >*/ 406bf436cfSPeter Maydell SysBusDevice parent_obj; 416bf436cfSPeter Maydell /*< public >*/ 426bf436cfSPeter Maydell 436bf436cfSPeter Maydell ARMCPU *cpu; 446bf436cfSPeter Maydell 456bf436cfSPeter Maydell VecInfo vectors[NVIC_MAX_VECTORS]; 4617906a16SPeter Maydell /* If the v8M security extension is implemented, some of the internal 4717906a16SPeter Maydell * exceptions are banked between security states (ie there exists both 4817906a16SPeter Maydell * a Secure and a NonSecure version of the exception and its state): 4917906a16SPeter Maydell * HardFault, MemManage, UsageFault, SVCall, PendSV, SysTick (R_PJHV) 5017906a16SPeter Maydell * The rest (including all the external exceptions) are not banked, though 5117906a16SPeter Maydell * they may be configurable to target either Secure or NonSecure state. 5217906a16SPeter Maydell * We store the secure exception state in sec_vectors[] for the banked 5317906a16SPeter Maydell * exceptions, and otherwise use only vectors[] (including for exceptions 5417906a16SPeter Maydell * like SecureFault that unconditionally target Secure state). 5517906a16SPeter Maydell * Entries in sec_vectors[] for non-banked exception numbers are unused. 5617906a16SPeter Maydell */ 5717906a16SPeter Maydell VecInfo sec_vectors[NVIC_INTERNAL_VECTORS]; 583b2e9344SPeter Maydell /* The PRIGROUP field in AIRCR is banked */ 593b2e9344SPeter Maydell uint32_t prigroup[M_REG_NUM_BANKS]; 60*c4379b48SJulia Suvorova uint8_t num_prio_bits; 616bf436cfSPeter Maydell 62e1be0a57SPeter Maydell /* v8M NVIC_ITNS state (stored as a bool per bit) */ 63e1be0a57SPeter Maydell bool itns[NVIC_MAX_VECTORS]; 64e1be0a57SPeter Maydell 65e93bc2acSPeter Maydell /* The following fields are all cached state that can be recalculated 66e93bc2acSPeter Maydell * from the vectors[] and sec_vectors[] arrays and the prigroup field: 67e93bc2acSPeter Maydell * - vectpending 68e93bc2acSPeter Maydell * - vectpending_is_secure 69e93bc2acSPeter Maydell * - exception_prio 705255fcf8SPeter Maydell * - vectpending_prio 716bf436cfSPeter Maydell */ 726bf436cfSPeter Maydell unsigned int vectpending; /* highest prio pending enabled exception */ 73e93bc2acSPeter Maydell /* true if vectpending is a banked secure exception, ie it is in 74e93bc2acSPeter Maydell * sec_vectors[] rather than vectors[] 75e93bc2acSPeter Maydell */ 76e93bc2acSPeter Maydell bool vectpending_is_s_banked; 776bf436cfSPeter Maydell int exception_prio; /* group prio of the highest prio active exception */ 785255fcf8SPeter Maydell int vectpending_prio; /* group prio of the exeception in vectpending */ 796bf436cfSPeter Maydell 806bf436cfSPeter Maydell MemoryRegion sysregmem; 81f104919dSPeter Maydell MemoryRegion sysreg_ns_mem; 8227f26bfeSPeter Maydell MemoryRegion systickmem; 8327f26bfeSPeter Maydell MemoryRegion systick_ns_mem; 846bf436cfSPeter Maydell MemoryRegion container; 856bf436cfSPeter Maydell 866bf436cfSPeter Maydell uint32_t num_irq; 876bf436cfSPeter Maydell qemu_irq excpout; 886bf436cfSPeter Maydell qemu_irq sysresetreq; 89ff68dacbSPeter Maydell 9027f26bfeSPeter Maydell SysTickState systick[M_REG_NUM_BANKS]; 916bf436cfSPeter Maydell } NVICState; 926bf436cfSPeter Maydell 936bf436cfSPeter Maydell #endif 94