xtensa: move kernel mapping addresses into kmem_layout.h

Create a header dedicated to memory layout definitions. Include it from
places where these definitions are needed.
Express vmalloc area address, VIRTUAL_MEMORY_ADDRESS and KERNELOFFSET
through KSEG address.

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

4 files changed, 33 insertions, 14 deletions

diff --git a/arch/xtensa/include/asm/kmem_layout.h b/arch/xtensa/include/asm/kmem_layout.h
new file mode 100644
index 0000000..4eb43b6
--- /dev/null
+++ b/arch/xtensa/include/asm/kmem_layout.h
@@ -0,0 +1,25 @@
+/*
+ * Kernel virtual memory layout definitions.
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License.  See the file "COPYING" in the main directory of
+ * this archive for more details.
+ *
+ * Copyright (C) 2016 Cadence Design Systems Inc.
+ */
+
+#ifndef _XTENSA_KMEM_LAYOUT_H
+#define _XTENSA_KMEM_LAYOUT_H
+
+#include <asm/types.h>
+
+/*
+ * Fixed TLB translations in the processor.
+ */
+
+#define XCHAL_KSEG_CACHED_VADDR	__XTENSA_UL_CONST(0xd0000000)
+#define XCHAL_KSEG_BYPASS_VADDR	__XTENSA_UL_CONST(0xd8000000)
+#define XCHAL_KSEG_SIZE		__XTENSA_UL_CONST(0x08000000)
+#define XCHAL_KSEG_PADDR	__XTENSA_UL_CONST(0x00000000)
+
+#endif
diff --git a/arch/xtensa/include/asm/page.h b/arch/xtensa/include/asm/page.h
index ad38500..fd12a19 100644
--- a/arch/xtensa/include/asm/page.h
+++ b/arch/xtensa/include/asm/page.h
@@ -15,15 +15,7 @@
 #include <asm/types.h>
 #include <asm/cache.h>
 #include <platform/hardware.h>
-
-/*
- * Fixed TLB translations in the processor.
- */
-
-#define XCHAL_KSEG_CACHED_VADDR __XTENSA_UL_CONST(0xd0000000)
-#define XCHAL_KSEG_BYPASS_VADDR __XTENSA_UL_CONST(0xd8000000)
-#define XCHAL_KSEG_PADDR        __XTENSA_UL_CONST(0x00000000)
-#define XCHAL_KSEG_SIZE         __XTENSA_UL_CONST(0x08000000)
+#include <asm/kmem_layout.h>
 
 /*
  * PAGE_SHIFT determines the page size
diff --git a/arch/xtensa/include/asm/pgtable.h b/arch/xtensa/include/asm/pgtable.h
index fb02fdc..8aa0e0d 100644
--- a/arch/xtensa/include/asm/pgtable.h
+++ b/arch/xtensa/include/asm/pgtable.h
@@ -13,6 +13,7 @@
 
 #include <asm-generic/pgtable-nopmd.h>
 #include <asm/page.h>
+#include <asm/kmem_layout.h>
 
 /*
  * We only use two ring levels, user and kernel space.
@@ -68,9 +69,9 @@
  * Virtual memory area. We keep a distance to other memory regions to be
  * on the safe side. We also use this area for cache aliasing.
  */
-#define VMALLOC_START		0xC0000000
-#define VMALLOC_END		0xC7FEFFFF
-#define TLBTEMP_BASE_1		0xC7FF0000
+#define VMALLOC_START		(XCHAL_KSEG_CACHED_VADDR - 0x10000000)
+#define VMALLOC_END		(VMALLOC_START + 0x07FEFFFF)
+#define TLBTEMP_BASE_1		(VMALLOC_END + 1)
 #define TLBTEMP_BASE_2		(TLBTEMP_BASE_1 + DCACHE_WAY_SIZE)
 #if 2 * DCACHE_WAY_SIZE > ICACHE_WAY_SIZE
 #define TLBTEMP_SIZE		(2 * DCACHE_WAY_SIZE)
diff --git a/arch/xtensa/include/asm/vectors.h b/arch/xtensa/include/asm/vectors.h
index 288c776..4821710 100644
--- a/arch/xtensa/include/asm/vectors.h
+++ b/arch/xtensa/include/asm/vectors.h
@@ -20,6 +20,7 @@
 
 #include <variant/core.h>
 #include <platform/hardware.h>
+#include <asm/kmem_layout.h>
 
 #if XCHAL_HAVE_PTP_MMU
 #define XCHAL_KIO_CACHED_VADDR		0xe0000000
@@ -48,10 +49,10 @@ static inline unsigned long xtensa_get_kio_paddr(void)
 #if defined(CONFIG_MMU)
 
 /* Will Become VECBASE */
-#define VIRTUAL_MEMORY_ADDRESS		0xD0000000
+#define VIRTUAL_MEMORY_ADDRESS		XCHAL_KSEG_CACHED_VADDR
 
 /* Image Virtual Start Address */
-#define KERNELOFFSET			0xD0003000
+#define KERNELOFFSET			(XCHAL_KSEG_CACHED_VADDR + 0x3000)
 
 #if defined(XCHAL_HAVE_PTP_MMU) && XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY
   /* MMU v3  - XCHAL_HAVE_PTP_MMU  == 1 */