Better STOPINTR bit semantics in the PXA2xx DMA.

Don't error out on reading GPCR register, just warn (Thorsten Zitterell).
Don't zero a memory that's already zeroed.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3676 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 5 insertions, 0 deletions

diff --git a/hw/pxa2xx_gpio.c b/hw/pxa2xx_gpio.c
index 9f5184438c..e3a30bc45e 100644
--- a/hw/pxa2xx_gpio.c
+++ b/hw/pxa2xx_gpio.c
@@ -154,6 +154,11 @@ static uint32_t pxa2xx_gpio_read(void *opaque, target_phys_addr_t offset)
                         __FUNCTION__, offset);
         return s->gpsr[bank];	/* Return last written value.  */
 
+    case GPCR:		/* GPIO Pin-Output Clear registers */
+        printf("%s: Read from a write-only register " REG_FMT "\n",
+                        __FUNCTION__, offset);
+        return 31337;		/* Specified as unpredictable in the docs.  */
+
     case GRER:		/* GPIO Rising-Edge Detect Enable registers */
         return s->rising[bank];