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-rw-r--r--target-arm/helper.c327
1 files changed, 281 insertions, 46 deletions
diff --git a/target-arm/helper.c b/target-arm/helper.c
index fd055e89f2..5f639fdeb8 100644
--- a/target-arm/helper.c
+++ b/target-arm/helper.c
@@ -64,6 +64,194 @@ static int vfp_gdb_set_reg(CPUARMState *env, uint8_t *buf, int reg)
return 0;
}
+static int raw_read(CPUARMState *env, const ARMCPRegInfo *ri,
+ uint64_t *value)
+{
+ *value = CPREG_FIELD32(env, ri);
+ return 0;
+}
+
+static int raw_write(CPUARMState *env, const ARMCPRegInfo *ri,
+ uint64_t value)
+{
+ CPREG_FIELD32(env, ri) = value;
+ return 0;
+}
+
+static bool read_raw_cp_reg(CPUARMState *env, const ARMCPRegInfo *ri,
+ uint64_t *v)
+{
+ /* Raw read of a coprocessor register (as needed for migration, etc)
+ * return true on success, false if the read is impossible for some reason.
+ */
+ if (ri->type & ARM_CP_CONST) {
+ *v = ri->resetvalue;
+ } else if (ri->raw_readfn) {
+ return (ri->raw_readfn(env, ri, v) == 0);
+ } else if (ri->readfn) {
+ return (ri->readfn(env, ri, v) == 0);
+ } else {
+ if (ri->type & ARM_CP_64BIT) {
+ *v = CPREG_FIELD64(env, ri);
+ } else {
+ *v = CPREG_FIELD32(env, ri);
+ }
+ }
+ return true;
+}
+
+static bool write_raw_cp_reg(CPUARMState *env, const ARMCPRegInfo *ri,
+ int64_t v)
+{
+ /* Raw write of a coprocessor register (as needed for migration, etc).
+ * Return true on success, false if the write is impossible for some reason.
+ * Note that constant registers are treated as write-ignored; the
+ * caller should check for success by whether a readback gives the
+ * value written.
+ */
+ if (ri->type & ARM_CP_CONST) {
+ return true;
+ } else if (ri->raw_writefn) {
+ return (ri->raw_writefn(env, ri, v) == 0);
+ } else if (ri->writefn) {
+ return (ri->writefn(env, ri, v) == 0);
+ } else {
+ if (ri->type & ARM_CP_64BIT) {
+ CPREG_FIELD64(env, ri) = v;
+ } else {
+ CPREG_FIELD32(env, ri) = v;
+ }
+ }
+ return true;
+}
+
+bool write_cpustate_to_list(ARMCPU *cpu)
+{
+ /* Write the coprocessor state from cpu->env to the (index,value) list. */
+ int i;
+ bool ok = true;
+
+ for (i = 0; i < cpu->cpreg_array_len; i++) {
+ uint32_t regidx = kvm_to_cpreg_id(cpu->cpreg_indexes[i]);
+ const ARMCPRegInfo *ri;
+ uint64_t v;
+ ri = get_arm_cp_reginfo(cpu, regidx);
+ if (!ri) {
+ ok = false;
+ continue;
+ }
+ if (ri->type & ARM_CP_NO_MIGRATE) {
+ continue;
+ }
+ if (!read_raw_cp_reg(&cpu->env, ri, &v)) {
+ ok = false;
+ continue;
+ }
+ cpu->cpreg_values[i] = v;
+ }
+ return ok;
+}
+
+bool write_list_to_cpustate(ARMCPU *cpu)
+{
+ int i;
+ bool ok = true;
+
+ for (i = 0; i < cpu->cpreg_array_len; i++) {
+ uint32_t regidx = kvm_to_cpreg_id(cpu->cpreg_indexes[i]);
+ uint64_t v = cpu->cpreg_values[i];
+ uint64_t readback;
+ const ARMCPRegInfo *ri;
+
+ ri = get_arm_cp_reginfo(cpu, regidx);
+ if (!ri) {
+ ok = false;
+ continue;
+ }
+ if (ri->type & ARM_CP_NO_MIGRATE) {
+ continue;
+ }
+ /* Write value and confirm it reads back as written
+ * (to catch read-only registers and partially read-only
+ * registers where the incoming migration value doesn't match)
+ */
+ if (!write_raw_cp_reg(&cpu->env, ri, v) ||
+ !read_raw_cp_reg(&cpu->env, ri, &readback) ||
+ readback != v) {
+ ok = false;
+ }
+ }
+ return ok;
+}
+
+static void add_cpreg_to_list(gpointer key, gpointer opaque)
+{
+ ARMCPU *cpu = opaque;
+ uint64_t regidx;
+ const ARMCPRegInfo *ri;
+
+ regidx = *(uint32_t *)key;
+ ri = get_arm_cp_reginfo(cpu, regidx);
+
+ if (!(ri->type & ARM_CP_NO_MIGRATE)) {
+ cpu->cpreg_indexes[cpu->cpreg_array_len] = cpreg_to_kvm_id(regidx);
+ /* The value array need not be initialized at this point */
+ cpu->cpreg_array_len++;
+ }
+}
+
+static void count_cpreg(gpointer key, gpointer opaque)
+{
+ ARMCPU *cpu = opaque;
+ uint64_t regidx;
+ const ARMCPRegInfo *ri;
+
+ regidx = *(uint32_t *)key;
+ ri = get_arm_cp_reginfo(cpu, regidx);
+
+ if (!(ri->type & ARM_CP_NO_MIGRATE)) {
+ cpu->cpreg_array_len++;
+ }
+}
+
+static gint cpreg_key_compare(gconstpointer a, gconstpointer b)
+{
+ uint32_t aidx = *(uint32_t *)a;
+ uint32_t bidx = *(uint32_t *)b;
+
+ return aidx - bidx;
+}
+
+void init_cpreg_list(ARMCPU *cpu)
+{
+ /* Initialise the cpreg_tuples[] array based on the cp_regs hash.
+ * Note that we require cpreg_tuples[] to be sorted by key ID.
+ */
+ GList *keys;
+ int arraylen;
+
+ keys = g_hash_table_get_keys(cpu->cp_regs);
+ keys = g_list_sort(keys, cpreg_key_compare);
+
+ cpu->cpreg_array_len = 0;
+
+ g_list_foreach(keys, count_cpreg, cpu);
+
+ arraylen = cpu->cpreg_array_len;
+ cpu->cpreg_indexes = g_new(uint64_t, arraylen);
+ cpu->cpreg_values = g_new(uint64_t, arraylen);
+ cpu->cpreg_vmstate_indexes = g_new(uint64_t, arraylen);
+ cpu->cpreg_vmstate_values = g_new(uint64_t, arraylen);
+ cpu->cpreg_vmstate_array_len = cpu->cpreg_array_len;
+ cpu->cpreg_array_len = 0;
+
+ g_list_foreach(keys, add_cpreg_to_list, cpu);
+
+ assert(cpu->cpreg_array_len == arraylen);
+
+ g_list_free(keys);
+}
+
static int dacr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
{
env->cp15.c3 = value;
@@ -139,13 +327,13 @@ static const ARMCPRegInfo cp_reginfo[] = {
{ .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 },
+ .resetvalue = 0, .writefn = dacr_write, .raw_writefn = raw_write, },
{ .name = "FCSEIDR", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 0,
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c13_fcse),
- .resetvalue = 0, .writefn = fcse_write },
+ .resetvalue = 0, .writefn = fcse_write, .raw_writefn = raw_write, },
{ .name = "CONTEXTIDR", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 1,
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c13_fcse),
- .resetvalue = 0, .writefn = contextidr_write },
+ .resetvalue = 0, .writefn = contextidr_write, .raw_writefn = raw_write, },
/* ??? This covers not just the impdef TLB lockdown registers but also
* some v7VMSA registers relating to TEX remap, so it is overly broad.
*/
@@ -155,13 +343,17 @@ static const ARMCPRegInfo cp_reginfo[] = {
* the unified TLB ops but also the dside/iside/inner-shareable variants.
*/
{ .name = "TLBIALL", .cp = 15, .crn = 8, .crm = CP_ANY,
- .opc1 = CP_ANY, .opc2 = 0, .access = PL1_W, .writefn = tlbiall_write, },
+ .opc1 = CP_ANY, .opc2 = 0, .access = PL1_W, .writefn = tlbiall_write,
+ .type = ARM_CP_NO_MIGRATE },
{ .name = "TLBIMVA", .cp = 15, .crn = 8, .crm = CP_ANY,
- .opc1 = CP_ANY, .opc2 = 1, .access = PL1_W, .writefn = tlbimva_write, },
+ .opc1 = CP_ANY, .opc2 = 1, .access = PL1_W, .writefn = tlbimva_write,
+ .type = ARM_CP_NO_MIGRATE },
{ .name = "TLBIASID", .cp = 15, .crn = 8, .crm = CP_ANY,
- .opc1 = CP_ANY, .opc2 = 2, .access = PL1_W, .writefn = tlbiasid_write, },
+ .opc1 = CP_ANY, .opc2 = 2, .access = PL1_W, .writefn = tlbiasid_write,
+ .type = ARM_CP_NO_MIGRATE },
{ .name = "TLBIMVAA", .cp = 15, .crn = 8, .crm = CP_ANY,
- .opc1 = CP_ANY, .opc2 = 3, .access = PL1_W, .writefn = tlbimvaa_write, },
+ .opc1 = CP_ANY, .opc2 = 3, .access = PL1_W, .writefn = tlbimvaa_write,
+ .type = ARM_CP_NO_MIGRATE },
/* Cache maintenance ops; some of this space may be overridden later. */
{ .name = "CACHEMAINT", .cp = 15, .crn = 7, .crm = CP_ANY,
.opc1 = 0, .opc2 = CP_ANY, .access = PL1_W,
@@ -196,7 +388,8 @@ static const ARMCPRegInfo not_v7_cp_reginfo[] = {
.resetvalue = 0 },
/* v6 doesn't have the cache ID registers but Linux reads them anyway */
{ .name = "DUMMY", .cp = 15, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = CP_ANY,
- .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
+ .access = PL1_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE,
+ .resetvalue = 0 },
REGINFO_SENTINEL
};
@@ -235,6 +428,7 @@ static const ARMCPRegInfo v6_cp_reginfo[] = {
REGINFO_SENTINEL
};
+
static int pmreg_read(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t *value)
{
@@ -366,13 +560,16 @@ static const ARMCPRegInfo v7_cp_reginfo[] = {
{ .name = "PMCNTENSET", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 1,
.access = PL0_RW, .resetvalue = 0,
.fieldoffset = offsetof(CPUARMState, cp15.c9_pmcnten),
- .readfn = pmreg_read, .writefn = pmcntenset_write },
+ .readfn = pmreg_read, .writefn = pmcntenset_write,
+ .raw_readfn = raw_read, .raw_writefn = raw_write },
{ .name = "PMCNTENCLR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 2,
.access = PL0_RW, .fieldoffset = offsetof(CPUARMState, cp15.c9_pmcnten),
- .readfn = pmreg_read, .writefn = pmcntenclr_write },
+ .readfn = pmreg_read, .writefn = pmcntenclr_write,
+ .type = ARM_CP_NO_MIGRATE },
{ .name = "PMOVSR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 3,
.access = PL0_RW, .fieldoffset = offsetof(CPUARMState, cp15.c9_pmovsr),
- .readfn = pmreg_read, .writefn = pmovsr_write },
+ .readfn = pmreg_read, .writefn = pmovsr_write,
+ .raw_readfn = raw_read, .raw_writefn = raw_write },
/* Unimplemented so WI. Strictly speaking write accesses in PL0 should
* respect PMUSERENR.
*/
@@ -389,7 +586,8 @@ static const ARMCPRegInfo v7_cp_reginfo[] = {
{ .name = "PMXEVTYPER", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 1,
.access = PL0_RW,
.fieldoffset = offsetof(CPUARMState, cp15.c9_pmxevtyper),
- .readfn = pmreg_read, .writefn = pmxevtyper_write },
+ .readfn = pmreg_read, .writefn = pmxevtyper_write,
+ .raw_readfn = raw_read, .raw_writefn = raw_write },
/* Unimplemented, RAZ/WI. XXX PMUSERENR */
{ .name = "PMXEVCNTR", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 2,
.access = PL0_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
@@ -397,22 +595,21 @@ static const ARMCPRegInfo v7_cp_reginfo[] = {
.access = PL0_R | PL1_RW,
.fieldoffset = offsetof(CPUARMState, cp15.c9_pmuserenr),
.resetvalue = 0,
- .writefn = pmuserenr_write },
+ .writefn = pmuserenr_write, .raw_writefn = raw_write },
{ .name = "PMINTENSET", .cp = 15, .crn = 9, .crm = 14, .opc1 = 0, .opc2 = 1,
.access = PL1_RW,
.fieldoffset = offsetof(CPUARMState, cp15.c9_pminten),
.resetvalue = 0,
- .writefn = pmintenset_write },
+ .writefn = pmintenset_write, .raw_writefn = raw_write },
{ .name = "PMINTENCLR", .cp = 15, .crn = 9, .crm = 14, .opc1 = 0, .opc2 = 2,
- .access = PL1_RW,
+ .access = PL1_RW, .type = ARM_CP_NO_MIGRATE,
.fieldoffset = offsetof(CPUARMState, cp15.c9_pminten),
- .resetvalue = 0,
- .writefn = pmintenclr_write },
+ .resetvalue = 0, .writefn = pmintenclr_write, },
{ .name = "SCR", .cp = 15, .crn = 1, .crm = 1, .opc1 = 0, .opc2 = 0,
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c1_scr),
.resetvalue = 0, },
{ .name = "CCSIDR", .cp = 15, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = 0,
- .access = PL1_R, .readfn = ccsidr_read },
+ .access = PL1_R, .readfn = ccsidr_read, .type = ARM_CP_NO_MIGRATE },
{ .name = "CSSELR", .cp = 15, .crn = 0, .crm = 0, .opc1 = 2, .opc2 = 0,
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c0_cssel),
.writefn = csselr_write, .resetvalue = 0 },
@@ -461,7 +658,7 @@ static const ARMCPRegInfo t2ee_cp_reginfo[] = {
.writefn = teecr_write },
{ .name = "TEEHBR", .cp = 14, .crn = 1, .crm = 0, .opc1 = 6, .opc2 = 0,
.access = PL0_RW, .fieldoffset = offsetof(CPUARMState, teehbr),
- .resetvalue = 0,
+ .resetvalue = 0, .raw_readfn = raw_read, .raw_writefn = raw_write,
.readfn = teehbr_read, .writefn = teehbr_write },
REGINFO_SENTINEL
};
@@ -486,7 +683,8 @@ static const ARMCPRegInfo generic_timer_cp_reginfo[] = {
/* Dummy implementation: RAZ/WI the whole crn=14 space */
{ .name = "GENERIC_TIMER", .cp = 15, .crn = 14,
.crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY,
- .access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
+ .access = PL1_RW, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE,
+ .resetvalue = 0 },
REGINFO_SENTINEL
};
@@ -579,7 +777,7 @@ static const ARMCPRegInfo vapa_cp_reginfo[] = {
.writefn = par_write },
#ifndef CONFIG_USER_ONLY
{ .name = "ATS", .cp = 15, .crn = 7, .crm = 8, .opc1 = 0, .opc2 = CP_ANY,
- .access = PL1_W, .writefn = ats_write },
+ .access = PL1_W, .writefn = ats_write, .type = ARM_CP_NO_MIGRATE },
#endif
REGINFO_SENTINEL
};
@@ -664,11 +862,11 @@ static int arm946_prbs_write(CPUARMState *env, const ARMCPRegInfo *ri,
static const ARMCPRegInfo pmsav5_cp_reginfo[] = {
{ .name = "DATA_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 0,
- .access = PL1_RW,
+ .access = PL1_RW, .type = ARM_CP_NO_MIGRATE,
.fieldoffset = offsetof(CPUARMState, cp15.c5_data), .resetvalue = 0,
.readfn = pmsav5_data_ap_read, .writefn = pmsav5_data_ap_write, },
{ .name = "INSN_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 1,
- .access = PL1_RW,
+ .access = PL1_RW, .type = ARM_CP_NO_MIGRATE,
.fieldoffset = offsetof(CPUARMState, cp15.c5_insn), .resetvalue = 0,
.readfn = pmsav5_insn_ap_read, .writefn = pmsav5_insn_ap_write, },
{ .name = "DATA_EXT_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 2,
@@ -690,15 +888,11 @@ static const ARMCPRegInfo pmsav5_cp_reginfo[] = {
REGINFO_SENTINEL
};
-static int vmsa_ttbcr_write(CPUARMState *env, const ARMCPRegInfo *ri,
- uint64_t value)
+static int vmsa_ttbcr_raw_write(CPUARMState *env, const ARMCPRegInfo *ri,
+ uint64_t value)
{
if (arm_feature(env, ARM_FEATURE_LPAE)) {
value &= ~((7 << 19) | (3 << 14) | (0xf << 3));
- /* With LPAE the TTBCR could result in a change of ASID
- * via the TTBCR.A1 bit, so do a TLB flush.
- */
- tlb_flush(env, 1);
} else {
value &= 7;
}
@@ -713,6 +907,18 @@ static int vmsa_ttbcr_write(CPUARMState *env, const ARMCPRegInfo *ri,
return 0;
}
+static int vmsa_ttbcr_write(CPUARMState *env, const ARMCPRegInfo *ri,
+ uint64_t value)
+{
+ if (arm_feature(env, ARM_FEATURE_LPAE)) {
+ /* With LPAE the TTBCR could result in a change of ASID
+ * via the TTBCR.A1 bit, so do a TLB flush.
+ */
+ tlb_flush(env, 1);
+ }
+ return vmsa_ttbcr_raw_write(env, ri, value);
+}
+
static void vmsa_ttbcr_reset(CPUARMState *env, const ARMCPRegInfo *ri)
{
env->cp15.c2_base_mask = 0xffffc000u;
@@ -735,7 +941,7 @@ static const ARMCPRegInfo vmsa_cp_reginfo[] = {
.fieldoffset = offsetof(CPUARMState, cp15.c2_base1), .resetvalue = 0, },
{ .name = "TTBCR", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 2,
.access = PL1_RW, .writefn = vmsa_ttbcr_write,
- .resetfn = vmsa_ttbcr_reset,
+ .resetfn = vmsa_ttbcr_reset, .raw_writefn = vmsa_ttbcr_raw_write,
.fieldoffset = offsetof(CPUARMState, cp15.c2_control) },
{ .name = "DFAR", .cp = 15, .crn = 6, .crm = 0, .opc1 = 0, .opc2 = 0,
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c6_data),
@@ -801,6 +1007,7 @@ static const ARMCPRegInfo omap_cp_reginfo[] = {
.writefn = omap_threadid_write },
{ .name = "TI925T_STATUS", .cp = 15, .crn = 15,
.crm = 8, .opc1 = 0, .opc2 = 0, .access = PL1_RW,
+ .type = ARM_CP_NO_MIGRATE,
.readfn = arm_cp_read_zero, .writefn = omap_wfi_write, },
/* TODO: Peripheral port remap register:
* On OMAP2 mcr p15, 0, rn, c15, c2, 4 sets up the interrupt controller
@@ -808,7 +1015,8 @@ static const ARMCPRegInfo omap_cp_reginfo[] = {
* when MMU is off.
*/
{ .name = "OMAP_CACHEMAINT", .cp = 15, .crn = 7, .crm = CP_ANY,
- .opc1 = 0, .opc2 = CP_ANY, .access = PL1_W, .type = ARM_CP_OVERRIDE,
+ .opc1 = 0, .opc2 = CP_ANY, .access = PL1_W,
+ .type = ARM_CP_OVERRIDE | ARM_CP_NO_MIGRATE,
.writefn = omap_cachemaint_write },
{ .name = "C9", .cp = 15, .crn = 9,
.crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW,
@@ -848,21 +1056,24 @@ static const ARMCPRegInfo dummy_c15_cp_reginfo[] = {
*/
{ .name = "C15_IMPDEF", .cp = 15, .crn = 15,
.crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY,
- .access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
+ .access = PL1_RW, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE,
+ .resetvalue = 0 },
REGINFO_SENTINEL
};
static const ARMCPRegInfo cache_dirty_status_cp_reginfo[] = {
/* Cache status: RAZ because we have no cache so it's always clean */
{ .name = "CDSR", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 6,
- .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
+ .access = PL1_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE,
+ .resetvalue = 0 },
REGINFO_SENTINEL
};
static const ARMCPRegInfo cache_block_ops_cp_reginfo[] = {
/* We never have a a block transfer operation in progress */
{ .name = "BXSR", .cp = 15, .crn = 7, .crm = 12, .opc1 = 0, .opc2 = 4,
- .access = PL0_R, .type = ARM_CP_CONST, .resetvalue = 0 },
+ .access = PL0_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE,
+ .resetvalue = 0 },
/* The cache ops themselves: these all NOP for QEMU */
{ .name = "IICR", .cp = 15, .crm = 5, .opc1 = 0,
.access = PL1_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
@@ -884,9 +1095,11 @@ static const ARMCPRegInfo cache_test_clean_cp_reginfo[] = {
* to indicate that there are no dirty cache lines.
*/
{ .name = "TC_DCACHE", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 3,
- .access = PL0_R, .type = ARM_CP_CONST, .resetvalue = (1 << 30) },
+ .access = PL0_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE,
+ .resetvalue = (1 << 30) },
{ .name = "TCI_DCACHE", .cp = 15, .crn = 7, .crm = 14, .opc1 = 0, .opc2 = 3,
- .access = PL0_R, .type = ARM_CP_CONST, .resetvalue = (1 << 30) },
+ .access = PL0_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE,
+ .resetvalue = (1 << 30) },
REGINFO_SENTINEL
};
@@ -894,8 +1107,8 @@ static const ARMCPRegInfo strongarm_cp_reginfo[] = {
/* Ignore ReadBuffer accesses */
{ .name = "C9_READBUFFER", .cp = 15, .crn = 9,
.crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY,
- .access = PL1_RW, .type = ARM_CP_CONST | ARM_CP_OVERRIDE,
- .resetvalue = 0 },
+ .access = PL1_RW, .resetvalue = 0,
+ .type = ARM_CP_CONST | ARM_CP_OVERRIDE | ARM_CP_NO_MIGRATE },
REGINFO_SENTINEL
};
@@ -921,7 +1134,7 @@ static int mpidr_read(CPUARMState *env, const ARMCPRegInfo *ri,
static const ARMCPRegInfo mpidr_cp_reginfo[] = {
{ .name = "MPIDR", .cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 5,
- .access = PL1_R, .readfn = mpidr_read },
+ .access = PL1_R, .readfn = mpidr_read, .type = ARM_CP_NO_MIGRATE },
REGINFO_SENTINEL
};
@@ -951,14 +1164,20 @@ static int ttbr064_read(CPUARMState *env, const ARMCPRegInfo *ri,
return 0;
}
-static int ttbr064_write(CPUARMState *env, const ARMCPRegInfo *ri,
- uint64_t value)
+static int ttbr064_raw_write(CPUARMState *env, const ARMCPRegInfo *ri,
+ uint64_t value)
{
env->cp15.c2_base0_hi = value >> 32;
env->cp15.c2_base0 = value;
+ return 0;
+}
+
+static int ttbr064_write(CPUARMState *env, const ARMCPRegInfo *ri,
+ uint64_t value)
+{
/* Writes to the 64 bit format TTBRs may change the ASID */
tlb_flush(env, 1);
- return 0;
+ return ttbr064_raw_write(env, ri, value);
}
static void ttbr064_reset(CPUARMState *env, const ARMCPRegInfo *ri)
@@ -1008,7 +1227,8 @@ static const ARMCPRegInfo lpae_cp_reginfo[] = {
.readfn = par64_read, .writefn = par64_write, .resetfn = par64_reset },
{ .name = "TTBR0", .cp = 15, .crm = 2, .opc1 = 0,
.access = PL1_RW, .type = ARM_CP_64BIT, .readfn = ttbr064_read,
- .writefn = ttbr064_write, .resetfn = ttbr064_reset },
+ .writefn = ttbr064_write, .raw_writefn = ttbr064_raw_write,
+ .resetfn = ttbr064_reset },
{ .name = "TTBR1", .cp = 15, .crm = 2, .opc1 = 1,
.access = PL1_RW, .type = ARM_CP_64BIT, .readfn = ttbr164_read,
.writefn = ttbr164_write, .resetfn = ttbr164_reset },
@@ -1104,7 +1324,8 @@ void register_cp_regs_for_features(ARMCPU *cpu)
.name = "PMCR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 0,
.access = PL0_RW, .resetvalue = cpu->midr & 0xff000000,
.fieldoffset = offsetof(CPUARMState, cp15.c9_pmcr),
- .readfn = pmreg_read, .writefn = pmcr_write
+ .readfn = pmreg_read, .writefn = pmcr_write,
+ .raw_readfn = raw_read, .raw_writefn = raw_write,
};
ARMCPRegInfo clidr = {
.name = "CLIDR", .cp = 15, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = 1,
@@ -1176,7 +1397,7 @@ void register_cp_regs_for_features(ARMCPU *cpu)
{ .name = "MIDR",
.cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 0,
.access = PL1_R, .resetvalue = cpu->midr,
- .writefn = arm_cp_write_ignore,
+ .writefn = arm_cp_write_ignore, .raw_writefn = raw_write,
.fieldoffset = offsetof(CPUARMState, cp15.c0_cpuid) },
{ .name = "CTR",
.cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 1,
@@ -1245,7 +1466,8 @@ void register_cp_regs_for_features(ARMCPU *cpu)
ARMCPRegInfo sctlr = {
.name = "SCTLR", .cp = 15, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 0,
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c1_sys),
- .writefn = sctlr_write, .resetvalue = cpu->reset_sctlr
+ .writefn = sctlr_write, .resetvalue = cpu->reset_sctlr,
+ .raw_writefn = raw_write,
};
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
/* Normally we would always end the TB on an SCTLR write, but Linux
@@ -1392,6 +1614,19 @@ void define_one_arm_cp_reg_with_opaque(ARMCPU *cpu,
r2->crm = crm;
r2->opc1 = opc1;
r2->opc2 = opc2;
+ /* By convention, for wildcarded registers only the first
+ * entry is used for migration; the others are marked as
+ * NO_MIGRATE so we don't try to transfer the register
+ * multiple times. Special registers (ie NOP/WFI) are
+ * never migratable.
+ */
+ if ((r->type & ARM_CP_SPECIAL) ||
+ ((r->crm == CP_ANY) && crm != 0) ||
+ ((r->opc1 == CP_ANY) && opc1 != 0) ||
+ ((r->opc2 == CP_ANY) && opc2 != 0)) {
+ r2->type |= ARM_CP_NO_MIGRATE;
+ }
+
/* Overriding of an existing definition must be explicitly
* requested.
*/
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-24 13:12:59 +0000