1 files changed, 17 insertions, 0 deletions

diff --git a/arch/arm/mach-u300/u300.c b/arch/arm/mach-u300/u300.c
index d2a0b8847a18..bfcda9820888 100644
--- a/arch/arm/mach-u300/u300.c
+++ b/arch/arm/mach-u300/u300.c
@@ -14,6 +14,7 @@
 #include <linux/sched.h>
 #include <linux/interrupt.h>
 #include <linux/ioport.h>
+#include <linux/memblock.h>
 #include <linux/platform_device.h>
 #include <linux/io.h>
 #include <mach/hardware.h>
@@ -22,6 +23,21 @@
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
 
+static void __init u300_reserve(void)
+{
+        /*
+         * U300 - This platform family can share physical memory
+         * between two ARM cpus, one running Linux and the other
+         * running another OS.
+         */
+#ifdef CONFIG_MACH_U300_SINGLE_RAM
+#if ((CONFIG_MACH_U300_ACCESS_MEM_SIZE & 1) == 1) && \
+        CONFIG_MACH_U300_2MB_ALIGNMENT_FIX
+        memblock_reserve(PHYS_OFFSET, 0x00100000);
+#endif
+#endif
+}
+
 static void __init u300_init_machine(void)
 {
         u300_init_devices();
@@ -49,6 +65,7 @@ MACHINE_START(U300, MACH_U300_STRING)
         .io_pg_offst    = ((U300_AHB_PER_VIRT_BASE) >> 18) & 0xfffc,
         .boot_params    = BOOT_PARAMS_OFFSET,
         .map_io         = u300_map_io,
+        .reserve        = u300_reserve,
         .init_irq       = u300_init_irq,
         .timer          = &u300_timer,
         .init_machine   = u300_init_machine,