diff options
Diffstat (limited to 'target-arm/cpu.h')
| -rw-r--r-- | target-arm/cpu.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/target-arm/cpu.h b/target-arm/cpu.h index 325b737d26..7938ddc91c 100644 --- a/target-arm/cpu.h +++ b/target-arm/cpu.h @@ -515,6 +515,13 @@ typedef struct CPUARMState { } CPUARMState; /** + * ARMELChangeHook: + * type of a function which can be registered via arm_register_el_change_hook() + * to get callbacks when the CPU changes its exception level or mode. + */ +typedef void ARMELChangeHook(ARMCPU *cpu, void *opaque); + +/** * ARMCPU: * @env: #CPUARMState * @@ -654,6 +661,9 @@ struct ARMCPU { /* DCZ blocksize, in log_2(words), ie low 4 bits of DCZID_EL0 */ uint32_t dcz_blocksize; uint64_t rvbar; + + ARMELChangeHook *el_change_hook; + void *el_change_hook_opaque; }; static inline ARMCPU *arm_env_get_cpu(CPUARMState *env) @@ -2386,4 +2396,28 @@ static inline AddressSpace *arm_addressspace(CPUState *cs, MemTxAttrs attrs) } #endif +/** + * arm_register_el_change_hook: + * Register a hook function which will be called back whenever this + * CPU changes exception level or mode. The hook function will be + * passed a pointer to the ARMCPU and the opaque data pointer passed + * to this function when the hook was registered. + * + * Note that we currently only support registering a single hook function, + * and will assert if this function is called twice. + * This facility is intended for the use of the GICv3 emulation. + */ +void arm_register_el_change_hook(ARMCPU *cpu, ARMELChangeHook *hook, + void *opaque); + +/** + * arm_get_el_change_hook_opaque: + * Return the opaque data that will be used by the el_change_hook + * for this CPU. + */ +static inline void *arm_get_el_change_hook_opaque(ARMCPU *cpu) +{ + return cpu->el_change_hook_opaque; +} + #endif |