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authorwdenk <wdenk>2004-06-09 00:10:59 +0000
committerwdenk <wdenk>2004-06-09 00:10:59 +0000
commit356a0d9f3123b57392935febd300ce32e63f1278 (patch)
treeac7c15b22c86a9c0c1d927bd300dc90847014cef /drivers/inca-ip_sw.c
parent1eaeb58e3c0022812b70d717bf1f458cfb48fdd3 (diff)
Patch by Markus Pietrek, 04 May 2004:
Fix clear_bss code for ARM systems (all except s3c44b0 which doesn't clear BSS at all?)
Diffstat (limited to 'drivers/inca-ip_sw.c')
-rw-r--r--drivers/inca-ip_sw.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/inca-ip_sw.c b/drivers/inca-ip_sw.c
index f8fe52ea26d..ab22b4d5385 100644
--- a/drivers/inca-ip_sw.c
+++ b/drivers/inca-ip_sw.c
@@ -41,13 +41,21 @@
#define DELAY udelay(10000)
+ /* Sometimes the store word instruction hangs while writing to one
+ * of the Switch registers. Moving the instruction into a separate
+ * function somehow makes the problem go away.
+ */
+static void SWORD(volatile u32 * reg, u32 value)
+{
+ *reg = value;
+}
#define DMA_WRITE_REG(reg, value) *((volatile u32 *)reg) = (u32)value;
#define DMA_READ_REG(reg, value) value = (u32)*((volatile u32*)reg)
#define SW_WRITE_REG(reg, value) \
- *((volatile u32*)reg) = (u32)value;\
+ SWORD(reg, value);\
DELAY;\
- *((volatile u32*)reg) = (u32)value;
+ SWORD(reg, value);
#define SW_READ_REG(reg, value) \
value = (u32)*((volatile u32*)reg);\