[09/38] target/hexagon: Add guest, system reg number state

Commit Message

Brian Cain March 1, 2025, 5:25 a.m. UTC

From: Brian Cain <[e-mail]>

Signed-off-by: Brian Cain <[e-mail]>
---
 target/hexagon/cpu.h |  8 ++++++++
 target/hexagon/cpu.c | 17 +++++++++++++++++
 2 files changed, 25 insertions(+)

Patch

diff --git a/target/hexagon/cpu.h b/target/hexagon/cpu.h
index 20ea0adcca..b7789a3c90 100644
--- a/target/hexagon/cpu.h
+++ b/target/hexagon/cpu.h
@@ -82,6 +82,14 @@  typedef struct CPUArchState {
     target_ulong stack_start;
 
     uint8_t slot_cancelled;
+
+#ifndef CONFIG_USER_ONLY
+    /* Some system registers are per thread and some are global. */
+    target_ulong t_sreg[NUM_SREGS];
+    target_ulong *g_sreg;
+
+    target_ulong greg[NUM_GREGS];
+#endif
     target_ulong new_value_usr;
 
     MemLog mem_log_stores[STORES_MAX];
diff --git a/target/hexagon/cpu.c b/target/hexagon/cpu.c
index 0b7fc98f6c..355e1eeef3 100644
--- a/target/hexagon/cpu.c
+++ b/target/hexagon/cpu.c
@@ -288,6 +288,14 @@  static void hexagon_cpu_reset_hold(Object *obj, ResetType type)
     set_float_detect_tininess(float_tininess_before_rounding, &env->fp_status);
     /* Default NaN value: sign bit set, all frac bits set */
     set_float_default_nan_pattern(0b11111111, &env->fp_status);
+
+#ifndef CONFIG_USER_ONLY
+    if (cs->cpu_index == 0) {
+        memset(env->g_sreg, 0, sizeof(target_ulong) * NUM_SREGS);
+    }
+    memset(env->t_sreg, 0, sizeof(target_ulong) * NUM_SREGS);
+    memset(env->greg, 0, sizeof(target_ulong) * NUM_GREGS);
+#endif
 }
 
 static void hexagon_cpu_disas_set_info(CPUState *s, disassemble_info *info)
@@ -313,6 +321,15 @@  static void hexagon_cpu_realize(DeviceState *dev, Error **errp)
 
     qemu_init_vcpu(cs);
     cpu_reset(cs);
+#ifndef CONFIG_USER_ONLY
+    if (cs->cpu_index == 0) {
+        env->g_sreg = g_new0(target_ulong, NUM_SREGS);
+    } else {
+        CPUState *cpu0 = qemu_get_cpu(0);
+        CPUHexagonState *env0 = cpu_env(cpu0);
+        env->g_sreg = env0->g_sreg;
+    }
+#endif
 
     mcc->parent_realize(dev, errp);
 }