From 260c64bbabdb8da7248c87e0cdd92023bd7b76c6 Mon Sep 17 00:00:00 2001
From: Max Filippov <jcmvbkbc@gmail.com>
Date: Thu, 24 Sep 2015 23:36:45 +0300
Subject: xtensa: nommu: provide correct KIO addresses

KIO region location is different for noMMU cores. Provide different
default physical address and make KIO virtual address equal to physical.

Move xtensa_get_kio_paddr function close to XCHAL_KIO_PADDR definition
and define it not only for MMUv3, but for all MMU options except MMUv2.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

diff --git a/arch/xtensa/include/asm/io.h b/arch/xtensa/include/asm/io.h
index 867840f..74fed0b 100644
--- a/arch/xtensa/include/asm/io.h
+++ b/arch/xtensa/include/asm/io.h
@@ -25,15 +25,6 @@
 
 #ifdef CONFIG_MMU
 
-#if XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY && defined(CONFIG_OF)
-extern unsigned long xtensa_kio_paddr;
-
-static inline unsigned long xtensa_get_kio_paddr(void)
-{
-	return xtensa_kio_paddr;
-}
-#endif
-
 /*
  * Return the virtual address for the specified bus memory.
  * Note that we currently don't support any address outside the KIO segment.
diff --git a/arch/xtensa/include/asm/vectors.h b/arch/xtensa/include/asm/vectors.h
index a46c53f..e34eaec 100644
--- a/arch/xtensa/include/asm/vectors.h
+++ b/arch/xtensa/include/asm/vectors.h
@@ -21,13 +21,26 @@
 #include <variant/core.h>
 #include <platform/hardware.h>
 
+#if XCHAL_HAVE_PTP_MMU
 #define XCHAL_KIO_CACHED_VADDR		0xe0000000
 #define XCHAL_KIO_BYPASS_VADDR		0xf0000000
 #define XCHAL_KIO_DEFAULT_PADDR		0xf0000000
+#else
+#define XCHAL_KIO_BYPASS_VADDR		XCHAL_KIO_PADDR
+#define XCHAL_KIO_DEFAULT_PADDR		0x90000000
+#endif
 #define XCHAL_KIO_SIZE			0x10000000
 
-#if XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY && defined(CONFIG_OF)
+#if (!XCHAL_HAVE_PTP_MMU || XCHAL_HAVE_SPANNING_WAY) && defined(CONFIG_OF)
 #define XCHAL_KIO_PADDR			xtensa_get_kio_paddr()
+#ifndef __ASSEMBLY__
+extern unsigned long xtensa_kio_paddr;
+
+static inline unsigned long xtensa_get_kio_paddr(void)
+{
+	return xtensa_kio_paddr;
+}
+#endif
 #else
 #define XCHAL_KIO_PADDR			XCHAL_KIO_DEFAULT_PADDR
 #endif
diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c
index 28fc57e..149d372 100644
--- a/arch/xtensa/kernel/setup.c
+++ b/arch/xtensa/kernel/setup.c
@@ -190,7 +190,7 @@ static int __init parse_bootparam(const bp_tag_t* tag)
 #ifdef CONFIG_OF
 bool __initdata dt_memory_scan = false;
 
-#if XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY
+#if !XCHAL_HAVE_PTP_MMU || XCHAL_HAVE_SPANNING_WAY
 unsigned long xtensa_kio_paddr = XCHAL_KIO_DEFAULT_PADDR;
 EXPORT_SYMBOL(xtensa_kio_paddr);
 
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