1 files changed, 104 insertions, 0 deletions
diff --git a/bsps/powerpc/mpc55xxevb/start/bspstart.c b/bsps/powerpc/mpc55xxevb/start/bspstart.c
new file mode 100644
index 0000000000..9042fc3864
--- /dev/null
+++ b/bsps/powerpc/mpc55xxevb/start/bspstart.c
@@ -0,0 +1,104 @@
+/**
+ * @file
+ *
+ * @ingroup mpc55xx
+ *
+ * @brief BSP startup code.
+ */
+
+/*
+ * Copyright (c) 2008-2013 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Dornierstr. 4
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@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.
+ */
+
+#include <mpc55xx/mpc55xx.h>
+#include <mpc55xx/regs.h>
+#include <mpc55xx/edma.h>
+#include <mpc55xx/emios.h>
+
+#include <string.h>
+
+#include <rtems.h>
+#include <rtems/config.h>
+#include <rtems/counter.h>
+
+#include <libcpu/powerpc-utility.h>
+#include <bsp/vectors.h>
+
+#include <bsp.h>
+#include <bsp/bootcard.h>
+#include <bsp/irq.h>
+#include <bsp/irq-generic.h>
+#include <bsp/linker-symbols.h>
+#include <bsp/start.h>
+#include <bsp/mpc55xx-config.h>
+
+/* Symbols defined in linker command file */
+LINKER_SYMBOL(mpc55xx_exc_vector_base);
+
+unsigned int bsp_clock_speed = 0;
+
+uint32_t bsp_clicks_per_usec = 0;
+
+static void null_pointer_protection(void)
+{
+#ifdef MPC55XX_NULL_POINTER_PROTECTION
+	struct MMU_tag mmu = { .MAS0 = { .B = { .TLBSEL = 1, .ESEL = 1 } } };
+
+	PPC_SET_SPECIAL_PURPOSE_REGISTER(FSL_EIS_MAS0, mmu.MAS0.R);
+	__asm__ volatile ("tlbre");
+	mmu.MAS1.R = PPC_SPECIAL_PURPOSE_REGISTER(FSL_EIS_MAS1);
+	mmu.MAS1.B.VALID = 0;
+	PPC_SET_SPECIAL_PURPOSE_REGISTER(FSL_EIS_MAS1, mmu.MAS1.R);
+	__asm__ volatile ("tlbwe");
+#endif
+}
+
+void bsp_start(void)
+{
+	null_pointer_protection();
+
+	/*
+	 * Get CPU identification dynamically. Note that the get_ppc_cpu_type()
+	 * function store the result in global variables so that it can be used
+	 * latter...
+	 */
+	get_ppc_cpu_type();
+	get_ppc_cpu_revision();
+
+	/*
+	 * determine clock speed
+	 */
+	bsp_clock_speed = mpc55xx_get_system_clock() / MPC55XX_SYSTEM_CLOCK_DIVIDER;
+
+	/* Time reference value */
+	bsp_clicks_per_usec = bsp_clock_speed / 1000000;
+	rtems_counter_initialize_converter(bsp_clock_speed);
+
+	/* Initialize exceptions */
+	ppc_exc_initialize_with_vector_base(
+		(uintptr_t) bsp_section_work_begin,
+		rtems_configuration_get_interrupt_stack_size(),
+		mpc55xx_exc_vector_base
+	);
+
+	/* Initialize interrupts */
+	bsp_interrupt_initialize();
+
+	#if MPC55XX_CHIP_FAMILY != 566
+		mpc55xx_edma_init();
+	#endif
+
+	#ifdef MPC55XX_EMIOS_PRESCALER
+		mpc55xx_emios_initialize(MPC55XX_EMIOS_PRESCALER);
+	#endif
+}