diff mbox series

[v7,04/10] hw/timer/xilinx_timer: Make device endianness configurable

Message ID 20250212123659.52764-5-philmd@linaro.org
State New
Headers show
Series hw/microblaze: Allow running cross-endian vCPUs | expand

Commit Message

Philippe Mathieu-Daudé Feb. 12, 2025, 12:36 p.m. UTC 
Replace the DEVICE_NATIVE_ENDIAN MemoryRegionOps by a pair
of DEVICE_LITTLE_ENDIAN / DEVICE_BIG_ENDIAN.
Add the "little-endian" property to select the device
endianness, defaulting to little endian.
Set the proper endianness for each machine using the device.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/microblaze/petalogix_ml605_mmu.c      |  1 +
 hw/microblaze/petalogix_s3adsp1800_mmu.c |  1 +
 hw/ppc/virtex_ml507.c                    |  1 +
 hw/riscv/microblaze-v-generic.c          |  2 ++
 hw/timer/xilinx_timer.c                  | 43 +++++++++++++++++-------
 5 files changed, 35 insertions(+), 13 deletions(-)

Comments

Thomas Huth Feb. 12, 2025, 1:04 p.m. UTC | #1 
On 12/02/2025 13.36, Philippe Mathieu-Daudé wrote:
> Replace the DEVICE_NATIVE_ENDIAN MemoryRegionOps by a pair
> of DEVICE_LITTLE_ENDIAN / DEVICE_BIG_ENDIAN.
> Add the "little-endian" property to select the device
> endianness, defaulting to little endian.
> Set the proper endianness for each machine using the device.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>   hw/microblaze/petalogix_ml605_mmu.c      |  1 +
>   hw/microblaze/petalogix_s3adsp1800_mmu.c |  1 +
>   hw/ppc/virtex_ml507.c                    |  1 +
>   hw/riscv/microblaze-v-generic.c          |  2 ++
>   hw/timer/xilinx_timer.c                  | 43 +++++++++++++++++-------
>   5 files changed, 35 insertions(+), 13 deletions(-)
> 
> diff --git a/hw/microblaze/petalogix_ml605_mmu.c b/hw/microblaze/petalogix_ml605_mmu.c
> index 55398cc67d1..490640e9428 100644
> --- a/hw/microblaze/petalogix_ml605_mmu.c
> +++ b/hw/microblaze/petalogix_ml605_mmu.c
> @@ -127,6 +127,7 @@ petalogix_ml605_init(MachineState *machine)
>   
>       /* 2 timers at irq 2 @ 100 Mhz.  */
>       dev = qdev_new("xlnx.xps-timer");
> +    qdev_prop_set_enum(dev, "endianness", ENDIAN_MODE_LITTLE);
>       qdev_prop_set_uint32(dev, "one-timer-only", 0);
>       qdev_prop_set_uint32(dev, "clock-frequency", 100 * 1000000);
>       sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);

Same question as in the second patch: Do we still need to take care of 
TARGET_BIG_ENDIAN here?

Anyway,
Reviewed-by: Thomas Huth <thuth@redhat.com>
diff mbox series

Patch

diff --git a/hw/microblaze/petalogix_ml605_mmu.c b/hw/microblaze/petalogix_ml605_mmu.c
index 55398cc67d1..490640e9428 100644
--- a/hw/microblaze/petalogix_ml605_mmu.c
+++ b/hw/microblaze/petalogix_ml605_mmu.c
@@ -127,6 +127,7 @@  petalogix_ml605_init(MachineState *machine)
 
     /* 2 timers at irq 2 @ 100 Mhz.  */
     dev = qdev_new("xlnx.xps-timer");
+    qdev_prop_set_enum(dev, "endianness", ENDIAN_MODE_LITTLE);
     qdev_prop_set_uint32(dev, "one-timer-only", 0);
     qdev_prop_set_uint32(dev, "clock-frequency", 100 * 1000000);
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
diff --git a/hw/microblaze/petalogix_s3adsp1800_mmu.c b/hw/microblaze/petalogix_s3adsp1800_mmu.c
index d419dc49a25..caaea222a8c 100644
--- a/hw/microblaze/petalogix_s3adsp1800_mmu.c
+++ b/hw/microblaze/petalogix_s3adsp1800_mmu.c
@@ -116,6 +116,7 @@  petalogix_s3adsp1800_init(MachineState *machine)
 
     /* 2 timers at irq 2 @ 62 Mhz.  */
     dev = qdev_new("xlnx.xps-timer");
+    qdev_prop_set_enum(dev, "endianness", endianness);
     qdev_prop_set_uint32(dev, "one-timer-only", 0);
     qdev_prop_set_uint32(dev, "clock-frequency", 62 * 1000000);
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
diff --git a/hw/ppc/virtex_ml507.c b/hw/ppc/virtex_ml507.c
index df8f9644829..a01354d991d 100644
--- a/hw/ppc/virtex_ml507.c
+++ b/hw/ppc/virtex_ml507.c
@@ -231,6 +231,7 @@  static void virtex_init(MachineState *machine)
 
     /* 2 timers at irq 2 @ 62 Mhz.  */
     dev = qdev_new("xlnx.xps-timer");
+    qdev_prop_set_enum(dev, "endianness", ENDIAN_MODE_BIG);
     qdev_prop_set_uint32(dev, "one-timer-only", 0);
     qdev_prop_set_uint32(dev, "clock-frequency", 62 * 1000000);
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
diff --git a/hw/riscv/microblaze-v-generic.c b/hw/riscv/microblaze-v-generic.c
index a21fdfbe6db..3c79f5733b2 100644
--- a/hw/riscv/microblaze-v-generic.c
+++ b/hw/riscv/microblaze-v-generic.c
@@ -104,6 +104,7 @@  static void mb_v_generic_init(MachineState *machine)
 
     /* 2 timers at irq 0 @ 100 Mhz.  */
     dev = qdev_new("xlnx.xps-timer");
+    qdev_prop_set_enum(dev, "endianness", ENDIAN_MODE_LITTLE);
     qdev_prop_set_uint32(dev, "one-timer-only", 0);
     qdev_prop_set_uint32(dev, "clock-frequency", 100000000);
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
@@ -112,6 +113,7 @@  static void mb_v_generic_init(MachineState *machine)
 
     /* 2 timers at irq 3 @ 100 Mhz.  */
     dev = qdev_new("xlnx.xps-timer");
+    qdev_prop_set_enum(dev, "endianness", ENDIAN_MODE_LITTLE);
     qdev_prop_set_uint32(dev, "one-timer-only", 0);
     qdev_prop_set_uint32(dev, "clock-frequency", 100000000);
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
diff --git a/hw/timer/xilinx_timer.c b/hw/timer/xilinx_timer.c
index 6595cf5f517..4620528f985 100644
--- a/hw/timer/xilinx_timer.c
+++ b/hw/timer/xilinx_timer.c
@@ -3,6 +3,9 @@ 
  *
  * Copyright (c) 2009 Edgar E. Iglesias.
  *
+ * DS573: https://docs.amd.com/v/u/en-US/xps_timer
+ * LogiCORE IP XPS Timer/Counter (v1.02a)
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
  * in the Software without restriction, including without limitation the rights
@@ -23,10 +26,12 @@ 
  */
 
 #include "qemu/osdep.h"
+#include "qapi/error.h"
 #include "hw/sysbus.h"
 #include "hw/irq.h"
 #include "hw/ptimer.h"
 #include "hw/qdev-properties.h"
+#include "hw/qdev-properties-system.h"
 #include "qemu/log.h"
 #include "qemu/module.h"
 #include "qom/object.h"
@@ -69,6 +74,7 @@  struct XpsTimerState
 {
     SysBusDevice parent_obj;
 
+    EndianMode model_endianness;
     MemoryRegion mmio;
     qemu_irq irq;
     uint8_t one_timer_only;
@@ -189,18 +195,21 @@  timer_write(void *opaque, hwaddr addr,
     timer_update_irq(t);
 }
 
-static const MemoryRegionOps timer_ops = {
-    .read = timer_read,
-    .write = timer_write,
-    .endianness = DEVICE_NATIVE_ENDIAN,
-    .impl = {
-        .min_access_size = 4,
-        .max_access_size = 4,
+static const MemoryRegionOps timer_ops[2] = {
+    [0 ... 1] = {
+        .read = timer_read,
+        .write = timer_write,
+        .impl = {
+            .min_access_size = 4,
+            .max_access_size = 4,
+        },
+        .valid = {
+            .min_access_size = 4,
+            .max_access_size = 4,
+        },
     },
-    .valid = {
-        .min_access_size = 4,
-        .max_access_size = 4
-    }
+    [0].endianness = DEVICE_LITTLE_ENDIAN,
+    [1].endianness = DEVICE_BIG_ENDIAN,
 };
 
 static void timer_hit(void *opaque)
@@ -220,6 +229,12 @@  static void xilinx_timer_realize(DeviceState *dev, Error **errp)
     XpsTimerState *t = XILINX_TIMER(dev);
     unsigned int i;
 
+    if (t->model_endianness == ENDIAN_MODE_UNSPECIFIED) {
+        error_setg(errp, TYPE_XILINX_TIMER " property 'endianness'"
+                         " must be set to 'big' or 'little'");
+        return;
+    }
+
     /* Init all the ptimers.  */
     t->timers = g_malloc0(sizeof t->timers[0] * num_timers(t));
     for (i = 0; i < num_timers(t); i++) {
@@ -233,8 +248,9 @@  static void xilinx_timer_realize(DeviceState *dev, Error **errp)
         ptimer_transaction_commit(xt->ptimer);
     }
 
-    memory_region_init_io(&t->mmio, OBJECT(t), &timer_ops, t, "xlnx.xps-timer",
-                          R_MAX * 4 * num_timers(t));
+    memory_region_init_io(&t->mmio, OBJECT(t),
+                          &timer_ops[t->model_endianness == ENDIAN_MODE_BIG],
+                          t, "xlnx.xps-timer", R_MAX * 4 * num_timers(t));
     sysbus_init_mmio(SYS_BUS_DEVICE(dev), &t->mmio);
 }
 
@@ -247,6 +263,7 @@  static void xilinx_timer_init(Object *obj)
 }
 
 static const Property xilinx_timer_properties[] = {
+    DEFINE_PROP_ENDIAN_NODEFAULT("endianness", XpsTimerState, model_endianness),
     DEFINE_PROP_UINT32("clock-frequency", XpsTimerState, freq_hz, 62 * 1000000),
     DEFINE_PROP_UINT8("one-timer-only", XpsTimerState, one_timer_only, 0),
 };