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Added bare bones irq support to V810 CPU [Miodrag Milanovic]

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This commit is contained in:
Angelo Salese 2010-11-18 17:36:16 +00:00
parent 35c83a4901
commit 2ae85ae98b
1 changed files with 47 additions and 6 deletions
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53
src/emu/cpu/v810/v810.c
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@ -28,14 +28,15 @@ struct _v810_state
{ {
UINT32 reg[65]; UINT32 reg[65];
UINT8 irq_line; UINT8 irq_line;
UINT8 irq_state;
UINT8 nmi_line; UINT8 nmi_line;
device_irq_callback irq_cb; device_irq_callback irq_callback;
legacy_cpu_device *device; legacy_cpu_device *device;
address_space *program; address_space *program;
direct_read_data *direct; direct_read_data *direct;
address_space *io; address_space *io;
UINT32 PPC; UINT32 PPC;
int icount; int icount;
}; };
INLINE v810_state *get_safe_token(running_device *device) INLINE v810_state *get_safe_token(running_device *device)
@ -542,6 +543,24 @@ static UINT32 opDI(v810_state *cpustate,UINT32 op)
return clkIF; return clkIF;
} }
static UINT32 opTRAP(v810_state *cpustate,UINT32 op)
{
logerror("V810: TRAP @ %X\n",cpustate->PC-2);
return clkIF;
}
static UINT32 opRETI(v810_state *cpustate,UINT32 op)
{
if(GET_NP) {
cpustate->PC = cpustate->FEPC;
cpustate->PSW = cpustate->FEPSW;
} else {
cpustate->PC = cpustate->EIPC;
cpustate->PSW = cpustate->EIPSW;
}
return clkIF;
}
static UINT32 opHALT(v810_state *cpustate,UINT32 op) static UINT32 opHALT(v810_state *cpustate,UINT32 op)
{ {
logerror("V810: HALT @ %X",cpustate->PC-2); logerror("V810: HALT @ %X",cpustate->PC-2);
@ -952,8 +971,8 @@ static UINT32 (*const OpCodeTable[64])(v810_state *cpustate,UINT32 op) =
/* 0x15 */ opSHRi, // shr imm5,r2 2 /* 0x15 */ opSHRi, // shr imm5,r2 2
/* 0x16 */ opEI, // ei 2 /* 0x16 */ opEI, // ei 2
/* 0x17 */ opSARi, // sar imm5,r2 2 /* 0x17 */ opSARi, // sar imm5,r2 2
/* 0x18 */ opUNDEF, /* 0x18 */ opTRAP,
/* 0x19 */ opUNDEF, /* 0x19 */ opRETI,
/* 0x1a */ opHALT, // halt 2 /* 0x1a */ opHALT, // halt 2
/* 0x1b */ opUNDEF, /* 0x1b */ opUNDEF,
/* 0x1c */ opLDSR, // ldsr reg2,regID 2 /* 0x1c */ opLDSR, // ldsr reg2,regID 2
@ -1000,7 +1019,7 @@ static CPU_INIT( v810 )
cpustate->irq_line = CLEAR_LINE; cpustate->irq_line = CLEAR_LINE;
cpustate->nmi_line = CLEAR_LINE; cpustate->nmi_line = CLEAR_LINE;
cpustate->irq_cb = irqcallback; cpustate->irq_callback = irqcallback;
cpustate->device = device; cpustate->device = device;
cpustate->program = device->space(AS_PROGRAM); cpustate->program = device->space(AS_PROGRAM);
cpustate->direct = &cpustate->program->direct(); cpustate->direct = &cpustate->program->direct();
@ -1023,6 +1042,20 @@ static CPU_RESET( v810 )
cpustate->ECR = 0x0000fff0; cpustate->ECR = 0x0000fff0;
} }
static void take_interrupt(v810_state *cpustate)
{
cpustate->EIPC = cpustate->PC;
cpustate->EIPSW = cpustate->PSW;
cpustate->PC = 0xfffffe00 | (cpustate->irq_line << 4);
SET_EP(1);
SET_ID(1);
UINT8 num = cpustate->irq_line + 1;
if (num==0x10) num=0x0f;
cpustate->PSW &= 0xffff;
cpustate->PSW |= num << 16;
}
static CPU_EXECUTE( v810 ) static CPU_EXECUTE( v810 )
{ {
v810_state *cpustate = get_safe_token(device); v810_state *cpustate = get_safe_token(device);
@ -1030,7 +1063,13 @@ static CPU_EXECUTE( v810 )
while(cpustate->icount>0) while(cpustate->icount>0)
{ {
UINT32 op; UINT32 op;
if (cpustate->irq_state != CLEAR_LINE) {
if (!(GET_NP | GET_EP | GET_ID)) {
if (cpustate->irq_line >=((cpustate->PSW & 0xF0000) >> 16)) {
take_interrupt(cpustate);
}
}
}
cpustate->PPC=cpustate->PC; cpustate->PPC=cpustate->PC;
debugger_instruction_hook(device, cpustate->PC); debugger_instruction_hook(device, cpustate->PC);
op=R_OP(cpustate,cpustate->PC); op=R_OP(cpustate,cpustate->PC);
@ -1042,6 +1081,8 @@ static CPU_EXECUTE( v810 )
static void set_irq_line(v810_state *cpustate, int irqline, int state) static void set_irq_line(v810_state *cpustate, int irqline, int state)
{ {
cpustate->irq_state = state;
cpustate->irq_line = irqline;
} }
/************************************************************************** /**************************************************************************