[PATCH] ppc32: Allow ERPN for early serial to depend on CPU type
The PowerPC 440SPe supports up to 16 GB of RAM, and therefore its IO registers
are at 0x4_xxxx_xxxx instead of being at 0x1_xxxx_xxxx like most other PPC 440
chips. To allow for this, this patch moves the definition of the ERPN used
for mapping UART0 from being hard-coded in the head_44x.S assembly code to
being defined in ibm44x.h.
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/asm-ppc/ibm44x.h b/include/asm-ppc/ibm44x.h
index e5374be..197a9ff 100644
--- a/include/asm-ppc/ibm44x.h
+++ b/include/asm-ppc/ibm44x.h
@@ -34,12 +34,17 @@
/* Lowest TLB slot consumed by the default pinned TLBs */
#define PPC44x_LOW_SLOT 63
-/* LS 32-bits of UART0 physical address location for early serial text debug */
+/*
+ * Least significant 32-bits and extended real page number (ERPN) of
+ * UART0 physical address location for early serial text debug
+ */
#if defined(CONFIG_440SP)
+#define UART0_PHYS_ERPN 1
#define UART0_PHYS_IO_BASE 0xf0000200
#elif defined(CONFIG_440EP)
#define UART0_PHYS_IO_BASE 0xe0000000
#else
+#define UART0_PHYS_ERPN 1
#define UART0_PHYS_IO_BASE 0x40000200
#endif