diff --git a/hw/mips/jazz.c b/hw/mips/jazz.c index dba2088ed1..1e1cf8154e 100644 --- a/hw/mips/jazz.c +++ b/hw/mips/jazz.c @@ -119,30 +119,6 @@ static const MemoryRegionOps dma_dummy_ops = { #define MAGNUM_BIOS_SIZE \ (BIOS_SIZE < MAGNUM_BIOS_SIZE_MAX ? BIOS_SIZE : MAGNUM_BIOS_SIZE_MAX) -#if defined(CONFIG_TCG) && !defined(CONFIG_USER_ONLY) -static void (*real_do_transaction_failed)(CPUState *cpu, hwaddr physaddr, - vaddr addr, unsigned size, - MMUAccessType access_type, - int mmu_idx, MemTxAttrs attrs, - MemTxResult response, - uintptr_t retaddr); - -static void mips_jazz_do_transaction_failed(CPUState *cs, hwaddr physaddr, - vaddr addr, unsigned size, - MMUAccessType access_type, - int mmu_idx, MemTxAttrs attrs, - MemTxResult response, - uintptr_t retaddr) -{ - if (access_type != MMU_INST_FETCH) { - /* ignore invalid access (ie do not raise exception) */ - return; - } - (*real_do_transaction_failed)(cs, physaddr, addr, size, access_type, - mmu_idx, attrs, response, retaddr); -} -#endif /* CONFIG_TCG && !CONFIG_USER_ONLY */ - static void mips_jazz_init(MachineState *machine, enum jazz_model_e jazz_model) { @@ -151,7 +127,7 @@ static void mips_jazz_init(MachineState *machine, int bios_size, n; Clock *cpuclk; MIPSCPU *cpu; - CPUClass *cc; + MIPSCPUClass *mcc; CPUMIPSState *env; qemu_irq *i8259; rc4030_dma *dmas; @@ -198,8 +174,6 @@ static void mips_jazz_init(MachineState *machine, * However, we can't simply add a global memory region to catch * everything, as this would make all accesses including instruction * accesses be ignored and not raise exceptions. - * So instead we hijack the do_transaction_failed method on the CPU, and - * do not raise exceptions for data access. * * NOTE: this behaviour of raising exceptions for bad instruction * fetches but not bad data accesses was added in commit 54e755588cf1e9 @@ -209,11 +183,8 @@ static void mips_jazz_init(MachineState *machine, * we could replace this hijacking of CPU methods with a simple global * memory region that catches all memory accesses, as we do on Malta. */ - cc = CPU_GET_CLASS(cpu); -#if defined(CONFIG_TCG) && !defined(CONFIG_USER_ONLY) - real_do_transaction_failed = cc->tcg_ops->do_transaction_failed; - cc->tcg_ops->do_transaction_failed = mips_jazz_do_transaction_failed; -#endif /* CONFIG_TCG && !CONFIG_USER_ONLY */ + mcc = MIPS_CPU_GET_CLASS(cpu); + mcc->no_data_aborts = true; /* allocate RAM */ memory_region_add_subregion(address_space, 0, machine->ram); diff --git a/target/mips/cpu-qom.h b/target/mips/cpu-qom.h index 826ab13019..dda0c911fa 100644 --- a/target/mips/cpu-qom.h +++ b/target/mips/cpu-qom.h @@ -47,6 +47,9 @@ struct MIPSCPUClass { DeviceRealize parent_realize; DeviceReset parent_reset; const struct mips_def_t *cpu_def; + + /* Used for the jazz board to modify mips_cpu_do_transaction_failed. */ + bool no_data_aborts; }; diff --git a/target/mips/tcg/op_helper.c b/target/mips/tcg/op_helper.c index ce1549c985..fafbf1faca 100644 --- a/target/mips/tcg/op_helper.c +++ b/target/mips/tcg/op_helper.c @@ -409,11 +409,12 @@ void mips_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr, MemTxResult response, uintptr_t retaddr) { MIPSCPU *cpu = MIPS_CPU(cs); + MIPSCPUClass *mcc = MIPS_CPU_GET_CLASS(cpu); CPUMIPSState *env = &cpu->env; if (access_type == MMU_INST_FETCH) { do_raise_exception(env, EXCP_IBE, retaddr); - } else { + } else if (!mcc->no_data_aborts) { do_raise_exception(env, EXCP_DBE, retaddr); } }