1 files changed, 58 insertions, 0 deletions
diff --git a/bsps/arm/beagle/start/bspstartmmu.c b/bsps/arm/beagle/start/bspstartmmu.c
new file mode 100644
index 0000000000..157edfa0a7
--- /dev/null
+++ b/bsps/arm/beagle/start/bspstartmmu.c
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2013 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Dornierstr. 4
+ *  82178 Puchheim
+ *  Germany
+ *  <info@embedded-brains.de>
+ *
+ * Copyright (c) 2014 Chris Johns.  All rights reserved.
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ */
+
+#include <bsp.h>
+#include <bsp/start.h>
+#include <bsp/arm-cp15-start.h>
+
+#define ARM_SECTIONS       4096          /* all sections needed to describe the
+                                            virtual address space */
+#define ARM_SECTION_SIZE   (1024 * 1024) /* how much virtual memory is described
+                                            by one section */
+
+//static uint32_t pagetable[ARM_SECTIONS] __attribute__((aligned (1024*16)));
+
+BSP_START_DATA_SECTION static const arm_cp15_start_section_config
+beagle_mmu_config_table[] = {
+  ARMV7_CP15_START_DEFAULT_SECTIONS,
+  {
+    .begin = 0x40000000U,
+    .end = 0x4FFFFFFFU,
+    .flags = ARMV7_MMU_DEVICE
+  }
+};
+
+/*
+ * Make weak and let the user override.
+ */
+BSP_START_TEXT_SECTION void beagle_setup_mmu_and_cache(void) __attribute__ ((weak));
+
+BSP_START_TEXT_SECTION void beagle_setup_mmu_and_cache(void)
+{
+  /* turn mmu off first in case it's on */
+  uint32_t ctrl = arm_cp15_start_setup_mmu_and_cache(
+    ARM_CP15_CTRL_M | ARM_CP15_CTRL_A,	/* clear - mmu off */
+    ARM_CP15_CTRL_AFE | ARM_CP15_CTRL_Z
+  );
+
+  arm_cp15_start_setup_translation_table_and_enable_mmu_and_cache(
+    ctrl,
+    (uint32_t *) bsp_translation_table_base,
+    ARM_MMU_DEFAULT_CLIENT_DOMAIN,
+    &beagle_mmu_config_table[0],
+    RTEMS_ARRAY_SIZE(beagle_mmu_config_table)
+  );
+}