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Diffstat (limited to 'arch/arm/mach-u300/u300.c')
-rw-r--r--arch/arm/mach-u300/u300.c17
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,