1 files changed, 20 insertions, 0 deletions

diff --git a/arch/arm/mach-at91/setup.c b/arch/arm/mach-at91/setup.c
index 43251efd90d4..816599fce55b 100644
--- a/arch/arm/mach-at91/setup.c
+++ b/arch/arm/mach-at91/setup.c
@@ -45,6 +45,26 @@ void __init at91_init_interrupts(unsigned int *priority)
         at91_gpio_irq_setup();
 }
 
+static struct map_desc sram_desc[2] __initdata;
+
+void __init at91_init_sram(int bank, unsigned long base, unsigned int length)
+{
+        struct map_desc *desc = &sram_desc[bank];
+
+        desc->virtual = AT91_IO_VIRT_BASE - length;
+        if (bank > 0)
+                desc->virtual -= sram_desc[bank - 1].length;
+
+        desc->pfn = __phys_to_pfn(base);
+        desc->length = length;
+        desc->type = MT_DEVICE;
+
+        pr_info("AT91: sram at 0x%lx of 0x%x mapped at 0x%lx\n",
+                base, length, desc->virtual);
+
+        iotable_init(desc, 1);
+}
+
 static struct map_desc at91_io_desc __initdata = {
         .virtual        = AT91_VA_BASE_SYS,
         .pfn            = __phys_to_pfn(AT91_BASE_SYS),