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target-arm: Convert cp15 c3 register 

Convert the cp15 c3 register (MMU domain access control
or MPU write buffer control). NB that this is horribly
underdecoded for modern cores (should be crn=3,crm=0,
opc1=0,opc2=0) but this change preserves the existing
QEMU behaviour.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2012-06-20 11:57:13 +00:00
parent 6cc7a3aee6
commit c983fe6cf1
1 changed files with 12 additions and 6 deletions
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18
target-arm/helper.c
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@ -56,6 +56,13 @@ static int vfp_gdb_set_reg(CPUARMState *env, uint8_t *buf, int reg)
return 0;
}
static int dacr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
{
env->cp15.c3 = value;
tlb_flush(env, 1); /* Flush TLB as domain not tracked in TLB */
return 0;
}
static const ARMCPRegInfo cp_reginfo[] = {
/* DBGDIDR: just RAZ. In particular this means the "debug architecture
* version" bits will read as a reserved value, which should cause
@ -63,6 +70,11 @@ static const ARMCPRegInfo cp_reginfo[] = {
*/
{ .name = "DBGDIDR", .cp = 14, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 0,
.access = PL0_R, .type = ARM_CP_CONST, .resetvalue = 0 },
/* MMU Domain access control / MPU write buffer control */
{ .name = "DACR", .cp = 15,
.crn = 3, .crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY,
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c3),
.resetvalue = 0, .writefn = dacr_write },
REGINFO_SENTINEL
};
@ -1551,10 +1563,6 @@ void HELPER(set_cp15)(CPUARMState *env, uint32_t insn, uint32_t val)
}
}
break;
case 3: /* MMU Domain access control / MPU write buffer control. */
env->cp15.c3 = val;
tlb_flush(env, 1); /* Flush TLB as domain not tracked in TLB */
break;
case 4: /* Reserved. */
goto bad_reg;
case 5: /* MMU Fault status / MPU access permission. */
@ -1942,8 +1950,6 @@ uint32_t HELPER(get_cp15)(CPUARMState *env, uint32_t insn)
goto bad_reg;
}
}
case 3: /* MMU Domain access control / MPU write buffer control. */
return env->cp15.c3;
case 4: /* Reserved. */
goto bad_reg;
case 5: /* MMU Fault status / MPU access permission. */