[08/12] target/mips: Expose MIPSCPU::is_big_endian property

Commit Message

Philippe Mathieu-Daudé Sept. 30, 2024, 9:10 a.m. UTC

Add the "big-endian" property and set the CP0C0_BE bit in CP0_Config0.

Signed-off-by: Philippe Mathieu-Daudé <[e-mail]>
---
 target/mips/cpu.h | 3 +++
 target/mips/cpu.c | 9 ++++++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

Patch

diff --git a/target/mips/cpu.h b/target/mips/cpu.h
index 3e906a175a..070e11fe0d 100644
--- a/target/mips/cpu.h
+++ b/target/mips/cpu.h
@@ -1209,6 +1209,9 @@  struct ArchCPU {
 
     Clock *clock;
     Clock *count_div; /* Divider for CP0_Count clock */
+
+    /* Properties */
+    bool is_big_endian;
 };
 
 /**
diff --git a/target/mips/cpu.c b/target/mips/cpu.c
index 89655b1900..982f5bb4e2 100644
--- a/target/mips/cpu.c
+++ b/target/mips/cpu.c
@@ -200,7 +200,8 @@  static void mips_cpu_reset_hold(Object *obj, ResetType type)
 
     /* Reset registers to their default values */
     env->CP0_PRid = env->cpu_model->CP0_PRid;
-    env->CP0_Config0 = env->cpu_model->CP0_Config0;
+    env->CP0_Config0 = deposit32(env->cpu_model->CP0_Config0,
+                                 CP0C0_BE, 1, cpu->is_big_endian);
 #if TARGET_BIG_ENDIAN
     env->CP0_Config0 |= (1 << CP0C0_BE);
 #endif
@@ -541,6 +542,11 @@  static const struct SysemuCPUOps mips_sysemu_ops = {
 };
 #endif
 
+static Property mips_cpu_properties[] = {
+    DEFINE_PROP_BOOL("big-endian", MIPSCPU, is_big_endian, TARGET_BIG_ENDIAN),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
 #ifdef CONFIG_TCG
 #include "hw/core/tcg-cpu-ops.h"
 /*
@@ -571,6 +577,7 @@  static void mips_cpu_class_init(ObjectClass *c, void *data)
     DeviceClass *dc = DEVICE_CLASS(c);
     ResettableClass *rc = RESETTABLE_CLASS(c);
 
+    device_class_set_props(dc, mips_cpu_properties);
     device_class_set_parent_realize(dc, mips_cpu_realizefn,
                                     &mcc->parent_realize);
     resettable_class_set_parent_phases(rc, NULL, mips_cpu_reset_hold, NULL,