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target/arm: Move PMSAv7 reset into arm_cpu_reset() so M profile MPUs get reset 

When the PMSAv7 implementation was originally added it was for R profile
CPUs only, and reset was handled using the cpreg .resetfn hooks.
Unfortunately for M profile cores this doesn't work, because they do
not register any cpregs. Move the reset handling into arm_cpu_reset(),
where it will work for both R profile and M profile cores.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 1501153150-19984-5-git-send-email-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2017-07-27 11:59:09 +01:00
parent 8531eb4f61
commit 69ceea64bf
2 changed files with 26 additions and 16 deletions
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14
target/arm/cpu.c
View File

@ -232,6 +232,20 @@ static void arm_cpu_reset(CPUState *s)
env->vfp.xregs[ARM_VFP_FPEXC] = 0;
#endif
if (arm_feature(env, ARM_FEATURE_PMSA) &&
arm_feature(env, ARM_FEATURE_V7)) {
if (cpu->pmsav7_dregion > 0) {
memset(env->pmsav7.drbar, 0,
sizeof(*env->pmsav7.drbar) * cpu->pmsav7_dregion);
memset(env->pmsav7.drsr, 0,
sizeof(*env->pmsav7.drsr) * cpu->pmsav7_dregion);
memset(env->pmsav7.dracr, 0,
sizeof(*env->pmsav7.dracr) * cpu->pmsav7_dregion);
}
env->pmsav7.rnr = 0;
}
set_flush_to_zero(1, &env->vfp.standard_fp_status);
set_flush_inputs_to_zero(1, &env->vfp.standard_fp_status);
set_default_nan_mode(1, &env->vfp.standard_fp_status);

28
target/arm/helper.c
View File

@ -2404,18 +2404,6 @@ static void pmsav7_write(CPUARMState *env, const ARMCPRegInfo *ri,
*u32p = value;
}
static void pmsav7_reset(CPUARMState *env, const ARMCPRegInfo *ri)
{
ARMCPU *cpu = arm_env_get_cpu(env);
uint32_t *u32p = *(uint32_t **)raw_ptr(env, ri);
if (!u32p) {
return;
}
memset(u32p, 0, sizeof(*u32p) * cpu->pmsav7_dregion);
}
static void pmsav7_rgnr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
@ -2433,22 +2421,30 @@ static void pmsav7_rgnr_write(CPUARMState *env, const ARMCPRegInfo *ri,
}
static const ARMCPRegInfo pmsav7_cp_reginfo[] = {
/* Reset for all these registers is handled in arm_cpu_reset(),
* because the PMSAv7 is also used by M-profile CPUs, which do
* not register cpregs but still need the state to be reset.
*/
{ .name = "DRBAR", .cp = 15, .crn = 6, .opc1 = 0, .crm = 1, .opc2 = 0,
.access = PL1_RW, .type = ARM_CP_NO_RAW,
.fieldoffset = offsetof(CPUARMState, pmsav7.drbar),
.readfn = pmsav7_read, .writefn = pmsav7_write, .resetfn = pmsav7_reset },
.readfn = pmsav7_read, .writefn = pmsav7_write,
.resetfn = arm_cp_reset_ignore },
{ .name = "DRSR", .cp = 15, .crn = 6, .opc1 = 0, .crm = 1, .opc2 = 2,
.access = PL1_RW, .type = ARM_CP_NO_RAW,
.fieldoffset = offsetof(CPUARMState, pmsav7.drsr),
.readfn = pmsav7_read, .writefn = pmsav7_write, .resetfn = pmsav7_reset },
.readfn = pmsav7_read, .writefn = pmsav7_write,
.resetfn = arm_cp_reset_ignore },
{ .name = "DRACR", .cp = 15, .crn = 6, .opc1 = 0, .crm = 1, .opc2 = 4,
.access = PL1_RW, .type = ARM_CP_NO_RAW,
.fieldoffset = offsetof(CPUARMState, pmsav7.dracr),
.readfn = pmsav7_read, .writefn = pmsav7_write, .resetfn = pmsav7_reset },
.readfn = pmsav7_read, .writefn = pmsav7_write,
.resetfn = arm_cp_reset_ignore },
{ .name = "RGNR", .cp = 15, .crn = 6, .opc1 = 0, .crm = 2, .opc2 = 0,
.access = PL1_RW,
.fieldoffset = offsetof(CPUARMState, pmsav7.rnr),
.writefn = pmsav7_rgnr_write },
.writefn = pmsav7_rgnr_write,
.resetfn = arm_cp_reset_ignore },
REGINFO_SENTINEL
};