[Qemu-devel] [PATCH v2 3/9] target-microblaze: Convert dcache-writeback to a CPU property

[Peter Crosthwaite]

From: Alistair Francis <address@hidden>

Originally  the dcache-writeback PVR bits were manually set for each machine.
This is a hassle and difficult to read, instead set them based on the CPU
properties.

Signed-off-by: Alistair Francis <address@hidden>
Reviewed-by: Edgar E. Iglesias <address@hidden>
---
 hw/microblaze/petalogix_ml605_mmu.c |    3 ++-
 target-microblaze/cpu-qom.h         |    1 +
 target-microblaze/cpu.c             |    5 +++++
 3 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/hw/microblaze/petalogix_ml605_mmu.c 
b/hw/microblaze/petalogix_ml605_mmu.c
index 05c120a..995a579 100644
--- a/hw/microblaze/petalogix_ml605_mmu.c
+++ b/hw/microblaze/petalogix_ml605_mmu.c
@@ -70,7 +70,6 @@ static void machine_cpu_reset(MicroBlazeCPU *cpu)
 
     env->pvr.regs[10] = 0x0e000000; /* virtex 6 */
     /* setup pvr to match kernel setting */
-    env->pvr.regs[5] |= PVR5_DCACHE_WRITEBACK_MASK;
     env->pvr.regs[0] |= PVR0_ENDI;
     env->pvr.regs[0] = (env->pvr.regs[0] & ~PVR0_VERSION_MASK) | (0x14 << 8);
     env->pvr.regs[4] = 0xc56b8000;
@@ -98,6 +97,8 @@ petalogix_ml605_init(MachineState *machine)
      * root instructions
      */
     object_property_set_int(OBJECT(cpu), 1, "use-fpu", &error_abort);
+    object_property_set_bool(OBJECT(cpu), true, "dcache-writeback",
+                             &error_abort);
     object_property_set_bool(OBJECT(cpu), true, "realized", &error_abort);
 
     /* Attach emulated BRAM through the LMB.  */
diff --git a/target-microblaze/cpu-qom.h b/target-microblaze/cpu-qom.h
index 6bde2e9..3b6165d 100644
--- a/target-microblaze/cpu-qom.h
+++ b/target-microblaze/cpu-qom.h
@@ -65,6 +65,7 @@ typedef struct MicroBlazeCPU {
         uint32_t base_vectors;
         uint8_t use_fpu;
         bool use_mmu;
+        bool dcache_writeback;
     } cfg;
 
     CPUMBState env;
diff --git a/target-microblaze/cpu.c b/target-microblaze/cpu.c
index c4cd68a..92c51a0 100644
--- a/target-microblaze/cpu.c
+++ b/target-microblaze/cpu.c
@@ -119,6 +119,9 @@ static void mb_cpu_realizefn(DeviceState *dev, Error **errp)
     env->pvr.regs[2] |= (cpu->cfg.use_fpu ? PVR2_USE_FPU_MASK : 0) |
                         (cpu->cfg.use_fpu > 1 ? PVR2_USE_FPU2_MASK : 0);
 
+    env->pvr.regs[5] |= cpu->cfg.dcache_writeback ?
+                                        PVR5_DCACHE_WRITEBACK_MASK : 0;
+
     env->pvr.regs[10] = 0x0c000000; /* Default to spartan 3a dsp family.  */
     env->pvr.regs[11] = PVR11_USE_MMU | (16 << 17);
 
@@ -169,6 +172,8 @@ static Property mb_properties[] = {
      */
     DEFINE_PROP_UINT8("use-fpu", MicroBlazeCPU, cfg.use_fpu, 2),
     DEFINE_PROP_BOOL("use-mmu", MicroBlazeCPU, cfg.use_mmu, true),
+    DEFINE_PROP_BOOL("dcache-writeback", MicroBlazeCPU, cfg.dcache_writeback,
+                     false),
     DEFINE_PROP_END_OF_LIST(),
 };
 
-- 
1.7.1