MIPS: Malta: Implement mips_cdmm_phys_base()

Implement mips_cdmm_phys_base() for Malta, returning the physical base
address 0x1fc10000 which is "typically unused".

This allows the Common Device Memory Map (CDMM) region to be mapped, and
devices in that region (such as the Fast Debug Channel (FDC) hardware
for communication over EJTAG) to be discovered.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/9177/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/mti-malta/malta-memory.c b/arch/mips/mti-malta/malta-memory.c
index 8fddd2cdbff72920cb7a9c73154a7b95413fb306..32c27cb8e463af5dce20988a3552ff0158e5b5b1 100644 (file)
--- a/arch/mips/mti-malta/malta-memory.c
+++ b/arch/mips/mti-malta/malta-memory.c
@@ -16,6 +16,7 @@
 #include <linux/string.h>
 
 #include <asm/bootinfo.h>
+#include <asm/cdmm.h>
 #include <asm/maar.h>
 #include <asm/sections.h>
 #include <asm/fw/fw.h>
@@ -196,3 +197,9 @@ unsigned platform_maar_init(unsigned num_pairs)
 
        return maar_config(cfg, num_cfg, num_pairs);
 }
+
+phys_addr_t mips_cdmm_phys_base(void)
+{
+       /* This address is "typically unused" */
+       return 0x1fc10000;
+}