1 files changed, 76 insertions, 0 deletions
diff --git a/bsps/arm/xilinx-zynq/start/bspstarthooks.c b/bsps/arm/xilinx-zynq/start/bspstarthooks.c
new file mode 100644
index 0000000000..5372380c24
--- /dev/null
+++ b/bsps/arm/xilinx-zynq/start/bspstarthooks.c
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2013-2014 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Dornierstr. 4
+ *  82178 Puchheim
+ *  Germany
+ *  <info@embedded-brains.de>
+ *
+ * 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.
+ */
+
+#define ARM_CP15_TEXT_SECTION BSP_START_TEXT_SECTION
+
+#include <bsp.h>
+#include <bsp/start.h>
+#include <bsp/arm-cp15-start.h>
+#include <bsp/arm-a9mpcore-start.h>
+
+BSP_START_TEXT_SECTION void bsp_start_hook_0(void)
+{
+  uint32_t sctlr_val;
+
+  sctlr_val = arm_cp15_get_control();
+
+  /*
+   * Current U-boot loader seems to start kernel image
+   * with I and D caches on and MMU enabled.
+   * If RTEMS application image finds that cache is on
+   * during startup then disable caches.
+   */
+  if ( sctlr_val & (ARM_CP15_CTRL_I | ARM_CP15_CTRL_C | ARM_CP15_CTRL_M ) ) {
+    if ( sctlr_val & (ARM_CP15_CTRL_C | ARM_CP15_CTRL_M ) ) {
+      /*
+       * If the data cache is on then ensure that it is clean
+       * before switching off to be extra carefull.
+       */
+      arm_cp15_data_cache_clean_all_levels();
+    }
+    arm_cp15_flush_prefetch_buffer();
+    sctlr_val &= ~ ( ARM_CP15_CTRL_I | ARM_CP15_CTRL_C | ARM_CP15_CTRL_M | ARM_CP15_CTRL_A );
+    arm_cp15_set_control( sctlr_val );
+  }
+  arm_cp15_instruction_cache_invalidate();
+  /*
+   * The care should be taken there that no shared levels
+   * are invalidated by secondary CPUs in SMP case.
+   * It is not problem on Zynq because level of coherency
+   * is L1 only and higher level is not maintained and seen
+   * by CP15. So no special care to limit levels on the secondary
+   * are required there.
+   */
+  arm_cp15_data_cache_invalidate_all_levels();
+  arm_cp15_branch_predictor_invalidate_all();
+  arm_cp15_tlb_invalidate();
+  arm_cp15_flush_prefetch_buffer();
+  arm_a9mpcore_start_hook_0();
+}
+
+BSP_START_TEXT_SECTION void bsp_start_hook_1(void)
+{
+  arm_a9mpcore_start_hook_1();
+  bsp_start_copy_sections();
+  zynq_setup_mmu_and_cache();
+
+#if !defined(RTEMS_SMP) \
+  && (defined(BSP_DATA_CACHE_ENABLED) \
+    || defined(BSP_INSTRUCTION_CACHE_ENABLED))
+  /* Enable unified L2 cache */
+  rtems_cache_enable_data();
+#endif
+
+  bsp_start_clear_bss();
+}