4 files changed, 33 insertions, 0 deletions

diff --git a/arch/arm/mach-davinci/dm355.c b/arch/arm/mach-davinci/dm355.c
index 893d5ba21d5..baaaf328de2 100644
--- a/arch/arm/mach-davinci/dm355.c
+++ b/arch/arm/mach-davinci/dm355.c
@@ -613,6 +613,13 @@ static struct map_desc dm355_io_desc[] = {
                 .length         = IO_SIZE,
                 .type           = MT_DEVICE
         },
+        {
+                .virtual        = SRAM_VIRT,
+                .pfn            = __phys_to_pfn(0x00010000),
+                .length         = SZ_32K,
+                /* MT_MEMORY_NONCACHED requires supersection alignment */
+                .type           = MT_DEVICE,
+        },
 };
 
 /* Contents of JTAG ID register used to identify exact cpu type */
@@ -702,6 +709,8 @@ static struct davinci_soc_info davinci_soc_info_dm355 = {
         .gpio_num               = 104,
         .gpio_irq               = IRQ_DM355_GPIOBNK0,
         .serial_dev             = &dm355_serial_device,
+        .sram_dma               = 0x00010000,
+        .sram_len               = SZ_32K,
 };
 
 void __init dm355_init(void)
diff --git a/arch/arm/mach-davinci/dm644x.c b/arch/arm/mach-davinci/dm644x.c
index 4ab5f07ead0..fb5449b3c97 100644
--- a/arch/arm/mach-davinci/dm644x.c
+++ b/arch/arm/mach-davinci/dm644x.c
@@ -539,6 +539,13 @@ static struct map_desc dm644x_io_desc[] = {
                 .length         = IO_SIZE,
                 .type           = MT_DEVICE
         },
+        {
+                .virtual        = SRAM_VIRT,
+                .pfn            = __phys_to_pfn(0x00008000),
+                .length         = SZ_16K,
+                /* MT_MEMORY_NONCACHED requires supersection alignment */
+                .type           = MT_DEVICE,
+        },
 };
 
 /* Contents of JTAG ID register used to identify exact cpu type */
@@ -629,6 +636,8 @@ static struct davinci_soc_info davinci_soc_info_dm644x = {
         .gpio_irq               = IRQ_GPIOBNK0,
         .serial_dev             = &dm644x_serial_device,
         .emac_pdata             = &dm644x_emac_pdata,
+        .sram_dma               = 0x00008000,
+        .sram_len               = SZ_16K,
 };
 
 void __init dm644x_init(void)
diff --git a/arch/arm/mach-davinci/dm646x.c b/arch/arm/mach-davinci/dm646x.c
index 12189c737a3..334f0711e0f 100644
--- a/arch/arm/mach-davinci/dm646x.c
+++ b/arch/arm/mach-davinci/dm646x.c
@@ -518,6 +518,13 @@ static struct map_desc dm646x_io_desc[] = {
                 .length         = IO_SIZE,
                 .type           = MT_DEVICE
         },
+        {
+                .virtual        = SRAM_VIRT,
+                .pfn            = __phys_to_pfn(0x00010000),
+                .length         = SZ_32K,
+                /* MT_MEMORY_NONCACHED requires supersection alignment */
+                .type           = MT_DEVICE,
+        },
 };
 
 /* Contents of JTAG ID register used to identify exact cpu type */
@@ -608,6 +615,8 @@ static struct davinci_soc_info davinci_soc_info_dm646x = {
         .gpio_irq               = IRQ_DM646X_GPIOBNK0,
         .serial_dev             = &dm646x_serial_device,
         .emac_pdata             = &dm646x_emac_pdata,
+        .sram_dma               = 0x10010000,
+        .sram_len               = SZ_32K,
 };
 
 void __init dm646x_init(void)
diff --git a/arch/arm/mach-davinci/include/mach/common.h b/arch/arm/mach-davinci/include/mach/common.h
index 715528f0dbd..a1f03b606d8 100644
--- a/arch/arm/mach-davinci/include/mach/common.h
+++ b/arch/arm/mach-davinci/include/mach/common.h
@@ -66,10 +66,16 @@ struct davinci_soc_info {
         unsigned                        gpio_irq;
         struct platform_device          *serial_dev;
         struct emac_platform_data       *emac_pdata;
+        dma_addr_t                      sram_dma;
+        unsigned                        sram_len;
 };
 
 extern struct davinci_soc_info davinci_soc_info;
 
 extern void davinci_common_init(struct davinci_soc_info *soc_info);
 
+/* standard place to map on-chip SRAMs; they *may* support DMA */
+#define SRAM_VIRT       0xfffe0000
+#define SRAM_SIZE       SZ_128K
+
 #endif /* __ARCH_ARM_MACH_DAVINCI_COMMON_H */