1 /* 2 * TCG CPU-specific operations 3 * 4 * Copyright 2021 SUSE LLC 5 * 6 * This work is licensed under the terms of the GNU GPL, version 2 or later. 7 * See the COPYING file in the top-level directory. 8 */ 9 10 #ifndef TCG_CPU_OPS_H 11 #define TCG_CPU_OPS_H 12 13 #include "hw/core/cpu.h" 14 15 struct TCGCPUOps { 16 /** 17 * @initialize: Initalize TCG state 18 * 19 * Called when the first CPU is realized. 20 */ 21 void (*initialize)(void); 22 /** 23 * @synchronize_from_tb: Synchronize state from a TCG #TranslationBlock 24 * 25 * This is called when we abandon execution of a TB before starting it, 26 * and must set all parts of the CPU state which the previous TB in the 27 * chain may not have updated. 28 * By default, when this is NULL, a call is made to @set_pc(tb->pc). 29 * 30 * If more state needs to be restored, the target must implement a 31 * function to restore all the state, and register it here. 32 */ 33 void (*synchronize_from_tb)(CPUState *cpu, const TranslationBlock *tb); 34 /** @cpu_exec_enter: Callback for cpu_exec preparation */ 35 void (*cpu_exec_enter)(CPUState *cpu); 36 /** @cpu_exec_exit: Callback for cpu_exec cleanup */ 37 void (*cpu_exec_exit)(CPUState *cpu); 38 /** 39 * @tlb_fill: Handle a softmmu tlb miss or user-only address fault 40 * 41 * For system mode, if the access is valid, call tlb_set_page 42 * and return true; if the access is invalid, and probe is 43 * true, return false; otherwise raise an exception and do 44 * not return. For user-only mode, always raise an exception 45 * and do not return. 46 */ 47 bool (*tlb_fill)(CPUState *cpu, vaddr address, int size, 48 MMUAccessType access_type, int mmu_idx, 49 bool probe, uintptr_t retaddr); 50 /** @debug_excp_handler: Callback for handling debug exceptions */ 51 void (*debug_excp_handler)(CPUState *cpu); 52 53 #ifdef NEED_CPU_H 54 #if defined(CONFIG_USER_ONLY) && defined(TARGET_I386) 55 /** 56 * @fake_user_interrupt: Callback for 'fake exception' handling. 57 * 58 * Simulate 'fake exception' which will be handled outside the 59 * cpu execution loop (hack for x86 user mode). 60 */ 61 void (*fake_user_interrupt)(CPUState *cpu); 62 #else 63 /** 64 * @do_interrupt: Callback for interrupt handling. 65 */ 66 void (*do_interrupt)(CPUState *cpu); 67 #endif /* !CONFIG_USER_ONLY || !TARGET_I386 */ 68 #ifdef CONFIG_SOFTMMU 69 /** @cpu_exec_interrupt: Callback for processing interrupts in cpu_exec */ 70 bool (*cpu_exec_interrupt)(CPUState *cpu, int interrupt_request); 71 /** 72 * @do_transaction_failed: Callback for handling failed memory transactions 73 * (ie bus faults or external aborts; not MMU faults) 74 */ 75 void (*do_transaction_failed)(CPUState *cpu, hwaddr physaddr, vaddr addr, 76 unsigned size, MMUAccessType access_type, 77 int mmu_idx, MemTxAttrs attrs, 78 MemTxResult response, uintptr_t retaddr); 79 /** 80 * @do_unaligned_access: Callback for unaligned access handling 81 * The callback must exit via raising an exception. 82 */ 83 void (*do_unaligned_access)(CPUState *cpu, vaddr addr, 84 MMUAccessType access_type, 85 int mmu_idx, uintptr_t retaddr) QEMU_NORETURN; 86 87 /** 88 * @adjust_watchpoint_address: hack for cpu_check_watchpoint used by ARM 89 */ 90 vaddr (*adjust_watchpoint_address)(CPUState *cpu, vaddr addr, int len); 91 92 /** 93 * @debug_check_watchpoint: return true if the architectural 94 * watchpoint whose address has matched should really fire, used by ARM 95 */ 96 bool (*debug_check_watchpoint)(CPUState *cpu, CPUWatchpoint *wp); 97 98 /** 99 * @debug_check_breakpoint: return true if the architectural 100 * breakpoint whose PC has matched should really fire. 101 */ 102 bool (*debug_check_breakpoint)(CPUState *cpu); 103 104 /** 105 * @io_recompile_replay_branch: Callback for cpu_io_recompile. 106 * 107 * The cpu has been stopped, and cpu_restore_state_from_tb has been 108 * called. If the faulting instruction is in a delay slot, and the 109 * target architecture requires re-execution of the branch, then 110 * adjust the cpu state as required and return true. 111 */ 112 bool (*io_recompile_replay_branch)(CPUState *cpu, 113 const TranslationBlock *tb); 114 #endif /* CONFIG_SOFTMMU */ 115 #endif /* NEED_CPU_H */ 116 117 }; 118 119 #endif /* TCG_CPU_OPS_H */ 120