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authorMax Filippov <jcmvbkbc@gmail.com>2015-09-24 23:36:45 +0300
committerMax Filippov <jcmvbkbc@gmail.com>2015-11-02 18:03:02 +0300
commit260c64bbabdb8da7248c87e0cdd92023bd7b76c6 (patch)
treebbb5763475f2d5fbc3bf61a4d1c9432bd1f74b0e /arch/xtensa
parentcfedf08b0c09f325fa24d91e8c9433ec481800cf (diff)
downloadlinux-linaro-stable-260c64bbabdb8da7248c87e0cdd92023bd7b76c6.tar.gz
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>
Diffstat (limited to 'arch/xtensa')
-rw-r--r--arch/xtensa/include/asm/io.h9
-rw-r--r--arch/xtensa/include/asm/vectors.h15
-rw-r--r--arch/xtensa/kernel/setup.c2
3 files changed, 15 insertions, 11 deletions
diff --git a/arch/xtensa/include/asm/io.h b/arch/xtensa/include/asm/io.h
index 867840f5400f..74fed0b4e2c2 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 a46c53f36113..e34eaecc9f3d 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 28fc57ef5b86..149d372a9350 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);