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target-arm: Add HCR_EL2

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Reviewed-by: Greg Bellows <greg.bellows@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-id: 1411718914-6608-2-git-send-email-edgar.iglesias@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Edgar E. Iglesias 2014-09-29 18:48:48 +01:00 • committed by Peter Maydell
parent c0f4af1719
commit f149e3e847
2 changed files with 70 additions and 0 deletions
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34
target-arm/helper.c
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@ -2225,10 +2225,44 @@ static const ARMCPRegInfo v8_el3_no_el2_cp_reginfo[] = {
.opc0 = 3, .opc1 = 4, .crn = 12, .crm = 0, .opc2 = 0,
.access = PL2_RW,
.readfn = arm_cp_read_zero, .writefn = arm_cp_write_ignore },
{ .name = "HCR_EL2", .state = ARM_CP_STATE_AA64,
.type = ARM_CP_NO_MIGRATE,
.opc0 = 3, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 0,
.access = PL2_RW,
.readfn = arm_cp_read_zero, .writefn = arm_cp_write_ignore },
REGINFO_SENTINEL
};
static void hcr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
{
ARMCPU *cpu = arm_env_get_cpu(env);
uint64_t valid_mask = HCR_MASK;
if (arm_feature(env, ARM_FEATURE_EL3)) {
valid_mask &= ~HCR_HCD;
} else {
valid_mask &= ~HCR_TSC;
}
/* Clear RES0 bits. */
value &= valid_mask;
/* These bits change the MMU setup:
* HCR_VM enables stage 2 translation
* HCR_PTW forbids certain page-table setups
* HCR_DC Disables stage1 and enables stage2 translation
*/
if ((raw_read(env, ri) ^ value) & (HCR_VM | HCR_PTW | HCR_DC)) {
tlb_flush(CPU(cpu), 1);
}
raw_write(env, ri, value);
}
static const ARMCPRegInfo v8_el2_cp_reginfo[] = {
{ .name = "HCR_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 0,
.access = PL2_RW, .fieldoffset = offsetof(CPUARMState, cp15.hcr_el2),
.writefn = hcr_write },
{ .name = "ELR_EL2", .state = ARM_CP_STATE_AA64,
.type = ARM_CP_NO_MIGRATE,
.opc0 = 3, .opc1 = 4, .crn = 4, .crm = 0, .opc2 = 1,