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Diffstat (limited to 'include/asm-arm/arch-ep93xx/uncompress.h')
-rw-r--r--include/asm-arm/arch-ep93xx/uncompress.h50
1 files changed, 41 insertions, 9 deletions
diff --git a/include/asm-arm/arch-ep93xx/uncompress.h b/include/asm-arm/arch-ep93xx/uncompress.h
index 4410d217077..c15274c85d5 100644
--- a/include/asm-arm/arch-ep93xx/uncompress.h
+++ b/include/asm-arm/arch-ep93xx/uncompress.h
@@ -16,17 +16,27 @@ static unsigned char __raw_readb(unsigned int ptr)
return *((volatile unsigned char *)ptr);
}
+static unsigned int __raw_readl(unsigned int ptr)
+{
+ return *((volatile unsigned int *)ptr);
+}
+
static void __raw_writeb(unsigned char value, unsigned int ptr)
{
*((volatile unsigned char *)ptr) = value;
}
+static void __raw_writel(unsigned int value, unsigned int ptr)
+{
+ *((volatile unsigned int *)ptr) = value;
+}
+
#define PHYS_UART1_DATA 0x808c0000
#define PHYS_UART1_FLAG 0x808c0018
#define UART1_FLAG_TXFF 0x20
-static __inline__ void putc(char c)
+static inline void putc(int c)
{
int i;
@@ -39,15 +49,37 @@ static __inline__ void putc(char c)
__raw_writeb(c, PHYS_UART1_DATA);
}
-static void putstr(const char *s)
+static inline void flush(void)
{
- while (*s) {
- putc(*s);
- if (*s == '\n')
- putc('\r');
- s++;
- }
}
-#define arch_decomp_setup()
+
+/*
+ * Some bootloaders don't turn off DMA from the ethernet MAC before
+ * jumping to linux, which means that we might end up with bits of RX
+ * status and packet data scribbled over the uncompressed kernel image.
+ * Work around this by resetting the ethernet MAC before we uncompress.
+ */
+#define PHYS_ETH_SELF_CTL 0x80010020
+#define ETH_SELF_CTL_RESET 0x00000001
+
+static void ethernet_reset(void)
+{
+ unsigned int v;
+
+ /* Reset the ethernet MAC. */
+ v = __raw_readl(PHYS_ETH_SELF_CTL);
+ __raw_writel(v | ETH_SELF_CTL_RESET, PHYS_ETH_SELF_CTL);
+
+ /* Wait for reset to finish. */
+ while (__raw_readl(PHYS_ETH_SELF_CTL) & ETH_SELF_CTL_RESET)
+ ;
+}
+
+
+static void arch_decomp_setup(void)
+{
+ ethernet_reset();
+}
+
#define arch_decomp_wdog()