haraldwolff/qemu-patch-raspberry4
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Fix BD flag handling, cause register contents, implement some more bits

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for R2 interrupt handling.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2493 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
ths 2007-03-18 12:43:40 +00:00
parent 36f696517b
commit 39d51eb8bc
4 changed files with 28 additions and 13 deletions
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13
hw/mips_int.c
View file

@ -20,20 +20,15 @@ void cpu_mips_update_irq(CPUState *env)
void cpu_mips_irq_request(void *opaque, int irq, int level)
{
CPUState *env = first_cpu;
uint32_t mask;
CPUState *env = (CPUState *)opaque;
if (irq >= 16)
if (irq < 0 || irq > 7)
return;
mask = 1 << (irq + CP0Ca_IP);
if (level) {
env->CP0_Cause |= mask;
env->CP0_Cause |= 1 << (irq + CP0Ca_IP);
} else {
env->CP0_Cause &= ~mask;
env->CP0_Cause &= ~(1 << (irq +CP0Ca_IP));
}
cpu_mips_update_irq(env);
}

7
hw/mips_timer.c
View file

@ -28,6 +28,9 @@ static void cpu_mips_update_count (CPUState *env, uint32_t count,
uint64_t now, next;
uint32_t tmp;
if (env->CP0_Cause & (1 << CP0Ca_DC))
return;
tmp = count;
if (count == compare)
tmp++;
@ -57,6 +60,8 @@ void cpu_mips_store_count (CPUState *env, uint32_t value)
void cpu_mips_store_compare (CPUState *env, uint32_t value)
{
cpu_mips_update_count(env, cpu_mips_get_count(env), value);
if ((env->CP0_Config0 & (0x7 << CP0C0_AR)) == (1 << CP0C0_AR))
env->CP0_Cause &= ~(1 << CP0Ca_TI);
cpu_mips_irq_request(env, 7, 0);
}
@ -71,6 +76,8 @@ static void mips_timer_cb (void *opaque)
}
#endif
cpu_mips_update_count(env, cpu_mips_get_count(env), env->CP0_Compare);
if ((env->CP0_Config0 & (0x7 << CP0C0_AR)) == (1 << CP0C0_AR))
env->CP0_Cause |= 1 << CP0Ca_TI;
cpu_mips_irq_request(env, 7, 1);
}

14
target-mips/helper.c
View file

@ -295,9 +295,12 @@ void do_interrupt (CPUState *env)
/* If the exception was raised from a delay slot,
come back to the jump. */
env->CP0_DEPC = env->PC - 4;
if (!(env->hflags & MIPS_HFLAG_EXL))
env->CP0_Cause |= (1 << CP0Ca_BD);
env->hflags &= ~MIPS_HFLAG_BMASK;
} else {
env->CP0_DEPC = env->PC;
env->CP0_Cause &= ~(1 << CP0Ca_BD);
}
enter_debug_mode:
env->hflags |= MIPS_HFLAG_DM;
@ -318,9 +321,12 @@ void do_interrupt (CPUState *env)
/* If the exception was raised from a delay slot,
come back to the jump. */
env->CP0_ErrorEPC = env->PC - 4;
if (!(env->hflags & MIPS_HFLAG_EXL))
env->CP0_Cause |= (1 << CP0Ca_BD);
env->hflags &= ~MIPS_HFLAG_BMASK;
} else {
env->CP0_ErrorEPC = env->PC;
env->CP0_Cause &= ~(1 << CP0Ca_BD);
}
env->hflags |= MIPS_HFLAG_ERL;
env->CP0_Status |= (1 << CP0St_ERL) | (1 << CP0St_BEV);
@ -364,7 +370,8 @@ void do_interrupt (CPUState *env)
goto set_EPC;
case EXCP_CpU:
cause = 11;
env->CP0_Cause = (env->CP0_Cause & ~0x03000000) | (env->error_code << 28);
env->CP0_Cause = (env->CP0_Cause & ~(0x3 << CP0Ca_CE)) |
(env->error_code << CP0Ca_CE);
goto set_EPC;
case EXCP_OVERFLOW:
cause = 12;
@ -385,11 +392,12 @@ void do_interrupt (CPUState *env)
/* If the exception was raised from a delay slot,
come back to the jump. */
env->CP0_EPC = env->PC - 4;
env->CP0_Cause |= 0x80000000;
if (!(env->hflags & MIPS_HFLAG_EXL))
env->CP0_Cause |= (1 << CP0Ca_BD);
env->hflags &= ~MIPS_HFLAG_BMASK;
} else {
env->CP0_EPC = env->PC;
env->CP0_Cause &= ~0x80000000;
env->CP0_Cause &= ~(1 << CP0Ca_BD);
}
if (env->CP0_Status & (1 << CP0St_BEV)) {
env->PC = (int32_t)0xBFC00200;

7
target-mips/op.c
View file

@ -1397,7 +1397,12 @@ void op_mtc0_srsmap (void)
void op_mtc0_cause (void)
{
env->CP0_Cause = (env->CP0_Cause & 0xB000F87C) | (T0 & 0x00C00300);
uint32_t mask = 0x00C00300;
if ((env->CP0_Config0 & (0x7 << CP0C0_AR)) == (1 << CP0C0_AR))
mask |= 1 << CP0Ca_DC;
env->CP0_Cause = (env->CP0_Cause & 0xFCC0FF7C) | (T0 & mask);
/* Handle the software interrupt as an hardware one, as they
are very similar */