[Qemu-devel] [PATCH v2 5/7] target-arm: Make TTBR0/1 and TTBRC cp

[Alvise Rigo <a.rigo@virtualopensystems.com>]

Revisit the definitions of the cp registers TTBR0/1 and TTBRC in such a way to
use the AArch32 ids format when the guest is using a 32bit model.

Signed-off-by: Alvise Rigo <a.rigo@virtualopensystems.com>
---
 target-arm/helper.c | 38 +++++++++++++++++++++++++++-----------
 1 file changed, 27 insertions(+), 11 deletions(-)

diff --git a/target-arm/helper.c b/target-arm/helper.c
index 30973cc..daa707e 100644
--- a/target-arm/helper.c
+++ b/target-arm/helper.c
@@ -1390,6 +1390,16 @@ static void vmsa_ttbcr_raw_write(CPUARMState *env, const ARMCPRegInfo *ri,
     env->cp15.c2_base_mask = ~((uint32_t)0x3fffu >> maskshift);
 }
 
+static void vmsa_control_raw_write(CPUARMState *env, const ARMCPRegInfo *ri,
+                                 uint64_t value)
+{
+    if (ri->state == ARM_CP_STATE_AA64) {
+        raw_write(env, ri, value);
+    } else {
+        vmsa_ttbcr_raw_write(env, ri, value);
+    }
+}
+
 static void vmsa_ttbcr_write(CPUARMState *env, const ARMCPRegInfo *ri,
                              uint64_t value)
 {
@@ -1417,6 +1427,16 @@ static void vmsa_tcr_el1_write(CPUARMState *env, const ARMCPRegInfo *ri,
     env->cp15.c2_control = value;
 }
 
+static void vmsa_control_write(CPUARMState *env, const ARMCPRegInfo *ri,
+                               uint64_t value)
+{
+    if (ri->state == ARM_CP_STATE_AA64) {
+        vmsa_tcr_el1_write(env, ri, value);
+    } else {
+        vmsa_ttbcr_write(env, ri, value);
+    }
+}
+
 static void vmsa_ttbr_write(CPUARMState *env, const ARMCPRegInfo *ri,
                             uint64_t value)
 {
@@ -1439,20 +1459,16 @@ static const ARMCPRegInfo vmsa_cp_reginfo[] = {
     { .name = "TTBR0_EL1", .state = ARM_CP_STATE_BOTH,
       .opc0 = 3, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 0,
       .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.ttbr0_el1),
-      .writefn = vmsa_ttbr_write, .resetvalue = 0 },
+      .writefn = vmsa_ttbr_write, .resetvalue = 0, .type = ARM_CP_NO_MIGRATE, },
     { .name = "TTBR1_EL1", .state = ARM_CP_STATE_BOTH,
       .opc0 = 3, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 1,
       .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.ttbr1_el1),
-      .writefn = vmsa_ttbr_write, .resetvalue = 0 },
-    { .name = "TCR_EL1", .state = ARM_CP_STATE_AA64,
+      .writefn = vmsa_ttbr_write, .resetvalue = 0, .type = ARM_CP_NO_MIGRATE, },
+    { .name = "TCR_EL1", .state = ARM_CP_STATE_BOTH,
       .opc0 = 3, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 2,
-      .access = PL1_RW, .writefn = vmsa_tcr_el1_write,
-      .resetfn = vmsa_ttbcr_reset, .raw_writefn = raw_write,
+      .access = PL1_RW, .writefn = vmsa_control_write,
+      .resetfn = vmsa_ttbcr_reset, .raw_writefn = vmsa_control_raw_write,
       .fieldoffset = offsetof(CPUARMState, cp15.c2_control) },
-    { .name = "TTBCR", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 2,
-      .access = PL1_RW, .type = ARM_CP_NO_MIGRATE, .writefn = vmsa_ttbcr_write,
-      .resetfn = arm_cp_reset_ignore, .raw_writefn = vmsa_ttbcr_raw_write,
-      .fieldoffset = offsetoflow32(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),
       .resetvalue = 0, },
@@ -1683,11 +1699,11 @@ static const ARMCPRegInfo lpae_cp_reginfo[] = {
       .access = PL1_RW, .type = ARM_CP_64BIT,
       .readfn = par64_read, .writefn = par64_write, .resetfn = par64_reset },
     { .name = "TTBR0", .cp = 15, .crm = 2, .opc1 = 0,
-      .access = PL1_RW, .type = ARM_CP_64BIT | ARM_CP_NO_MIGRATE,
+      .access = PL1_RW, .type = ARM_CP_64BIT,
       .fieldoffset = offsetof(CPUARMState, cp15.ttbr0_el1),
       .writefn = vmsa_ttbr_write, .resetfn = arm_cp_reset_ignore },
     { .name = "TTBR1", .cp = 15, .crm = 2, .opc1 = 1,
-      .access = PL1_RW, .type = ARM_CP_64BIT | ARM_CP_NO_MIGRATE,
+      .access = PL1_RW, .type = ARM_CP_64BIT,
       .fieldoffset = offsetof(CPUARMState, cp15.ttbr1_el1),
       .writefn = vmsa_ttbr_write, .resetfn = arm_cp_reset_ignore },
     REGINFO_SENTINEL
-- 
1.8.3.2