ARM: 5927/1: Make delimiters of DMA area globally visibly.

Adds DMA area to 'virtual memory map' startup message

Tested-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Andreas Fenkart <andreas.fenkart@streamunlimited.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

3 files changed, 17 insertions, 11 deletions

diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h
index 5421d82a2572..f5e693b8bab3 100644
--- a/arch/arm/include/asm/memory.h
+++ b/arch/arm/include/asm/memory.h
@@ -76,6 +76,17 @@
  */
 #define IOREMAP_MAX_ORDER       24
 
+/*
+ * Size of DMA-consistent memory region.  Must be multiple of 2M,
+ * between 2MB and 14MB inclusive.
+ */
+#ifndef CONSISTENT_DMA_SIZE
+#define CONSISTENT_DMA_SIZE     SZ_2M
+#endif
+
+#define CONSISTENT_END          (0xffe00000UL)
+#define CONSISTENT_BASE         (CONSISTENT_END - CONSISTENT_DMA_SIZE)
+
 #else /* CONFIG_MMU */
 
 /*
@@ -113,14 +124,6 @@
 #endif /* !CONFIG_MMU */
 
 /*
- * Size of DMA-consistent memory region.  Must be multiple of 2M,
- * between 2MB and 14MB inclusive.
- */
-#ifndef CONSISTENT_DMA_SIZE
-#define CONSISTENT_DMA_SIZE SZ_2M
-#endif
-
-/*
  * Physical vs virtual RAM address space conversion.  These are
  * private definitions which should NOT be used outside memory.h
  * files.  Use virt_to_phys/phys_to_virt/__pa/__va instead.
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 26325cb5d368..48eedab1609b 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -29,9 +29,6 @@
 #error "CONSISTENT_DMA_SIZE must be multiple of 2MiB"
 #endif
 
-#define CONSISTENT_END  (0xffe00000)
-#define CONSISTENT_BASE (CONSISTENT_END - CONSISTENT_DMA_SIZE)
-
 #define CONSISTENT_OFFSET(x)    (((unsigned long)(x) - CONSISTENT_BASE) >> PAGE_SHIFT)
 #define CONSISTENT_PTE_INDEX(x) (((unsigned long)(x) - CONSISTENT_BASE) >> PGDIR_SHIFT)
 #define NUM_CONSISTENT_PTES (CONSISTENT_DMA_SIZE >> PGDIR_SHIFT)
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index e8e3a74ac5b5..bda481e6bc0f 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -651,6 +651,9 @@ void __init mem_init(void)
         printk(KERN_NOTICE "Virtual kernel memory layout:\n"
                         "    vector  : 0x%08lx - 0x%08lx   (%4ld kB)\n"
                         "    fixmap  : 0x%08lx - 0x%08lx   (%4ld kB)\n"
+#ifdef CONFIG_MMU
+                        "    DMA     : 0x%08lx - 0x%08lx   (%4ld MB)\n"
+#endif
                         "    vmalloc : 0x%08lx - 0x%08lx   (%4ld MB)\n"
                         "    lowmem  : 0x%08lx - 0x%08lx   (%4ld MB)\n"
 #ifdef CONFIG_HIGHMEM
@@ -664,6 +667,9 @@ void __init mem_init(void)
                         MLK(UL(CONFIG_VECTORS_BASE), UL(CONFIG_VECTORS_BASE) +
                                 (PAGE_SIZE)),
                         MLK(FIXADDR_START, FIXADDR_TOP),
+#ifdef CONFIG_MMU
+                        MLM(CONSISTENT_BASE, CONSISTENT_END),
+#endif
                         MLM(VMALLOC_START, (unsigned long)VMALLOC_END),
                         MLM(PAGE_OFFSET, (unsigned long)high_memory),
 #ifdef CONFIG_HIGHMEM