dev, arm: Implement the NoMali reset callback

Add a callback handler for the NoMali reset callback. This callback is
called whenever the GPU is reset using the register interface or the
NoMali API. The callback can be used to override ID registers using
the raw register API.

1 files changed, 33 insertions, 0 deletions

diff --git a/src/dev/arm/gpu_nomali.cc b/src/dev/arm/gpu_nomali.cc
index 3f074b595..da0f43ef9 100644
--- a/src/dev/arm/gpu_nomali.cc
+++ b/src/dev/arm/gpu_nomali.cc
@@ -92,6 +92,13 @@ NoMaliGpu::NoMaliGpu(const NoMaliGpuParams *p)
     cbk_int.func.interrupt = NoMaliGpu::_interrupt;
     setCallback(cbk_int);
 
+    /* Setup a reset callback */
+    nomali_callback_t cbk_rst;
+    cbk_rst.type = NOMALI_CALLBACK_RESET;
+    cbk_rst.usr = (void *)this;
+    cbk_rst.func.reset = NoMaliGpu::_reset;
+    setCallback(cbk_rst);
+
     panicOnErr(
         nomali_get_info(nomali, &nomaliInfo),
         "Failed to get NoMali information struct");
@@ -102,6 +109,18 @@ NoMaliGpu::~NoMaliGpu()
     nomali_destroy(nomali);
 }
 
+
+void
+NoMaliGpu::init()
+{
+    PioDevice::init();
+
+    /* Reset the GPU here since the reset callback won't have been
+     * installed when the GPU was reset at instantiation time.
+     */
+    reset();
+}
+
 void
 NoMaliGpu::serialize(CheckpointOut &cp) const
 {
@@ -268,6 +287,12 @@ NoMaliGpu::onInterrupt(nomali_int_t intno, bool set)
 }
 
 void
+NoMaliGpu::onReset()
+{
+    DPRINTF(NoMali, "Reset\n");
+}
+
+void
 NoMaliGpu::setCallback(const nomali_callback_t &callback)
 {
     DPRINTF(NoMali, "Registering callback %i\n",
@@ -287,6 +312,14 @@ NoMaliGpu::_interrupt(nomali_handle_t h, void *usr,
     _this->onInterrupt(intno, !!set);
 }
 
+void
+NoMaliGpu::_reset(nomali_handle_t h, void *usr)
+{
+    NoMaliGpu *_this(static_cast<NoMaliGpu *>(usr));
+
+    _this->onReset();
+}
+
 NoMaliGpu *
 NoMaliGpuParams::create()
 {