1 files changed, 129 insertions, 0 deletions
diff --git a/bsps/powerpc/gen83xx/start/bspstart.c b/bsps/powerpc/gen83xx/start/bspstart.c
new file mode 100644
index 0000000000..cd729a8e17
--- /dev/null
+++ b/bsps/powerpc/gen83xx/start/bspstart.c
@@ -0,0 +1,129 @@
+/**
+ * @file
+ *
+ * @ingroup mpc83xx
+ *
+ * @brief Source for BSP startup code.
+ */
+
+/*
+ * Copyright (c) 2008-2014 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.
+ */
+
+#include <rtems/counter.h>
+
+#include <libchip/ns16550.h>
+
+#include <libcpu/powerpc-utility.h>
+
+#include <bsp.h>
+#include <bsp/vectors.h>
+#include <bsp/bootcard.h>
+#include <bsp/irq-generic.h>
+#include <bsp/linker-symbols.h>
+#include <bsp/u-boot.h>
+#include <bsp/console-termios.h>
+
+/* Configuration parameters for console driver, ... */
+unsigned int BSP_bus_frequency;
+
+/* Configuration parameter for clock driver */
+uint32_t bsp_time_base_frequency;
+
+/* Legacy */
+uint32_t bsp_clicks_per_usec;
+
+/* Default decrementer exception handler */
+static int mpc83xx_decrementer_exception_handler( BSP_Exception_frame *frame, unsigned number)
+{
+  ppc_set_decrementer_register(UINT32_MAX);
+
+  return 0;
+}
+
+void bsp_start( void)
+{
+  rtems_status_code sc = RTEMS_SUCCESSFUL;
+  unsigned long i = 0;
+
+  /*
+   * 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();
+
+  /* Basic CPU initialization */
+  cpu_init();
+
+  /*
+   * Enable instruction and data caches. Do not force writethrough mode.
+   */
+
+#ifdef BSP_INSTRUCTION_CACHE_ENABLED
+  rtems_cache_enable_instruction();
+#endif
+
+#ifdef BSP_DATA_CACHE_ENABLED
+  rtems_cache_enable_data();
+#endif
+
+  /*
+   * This is evaluated during runtime, so it should be ok to set it
+   * before we initialize the drivers.
+   */
+
+  /* Initialize some device driver parameters */
+
+#ifdef HAS_UBOOT
+  BSP_bus_frequency = bsp_uboot_board_info.bi_busfreq;
+#else /* HAS_UBOOT */
+  BSP_bus_frequency = BSP_CLKIN_FRQ * BSP_SYSPLL_MF / BSP_SYSPLL_CKID;
+#endif /* HAS_UBOOT */
+  bsp_time_base_frequency = BSP_bus_frequency / 4;
+  bsp_clicks_per_usec = bsp_time_base_frequency / 1000000;
+  rtems_counter_initialize_converter(bsp_time_base_frequency);
+
+  /* Initialize some console parameters */
+  for (i = 0; i < console_device_count; ++i) {
+    ns16550_context *ctx = (ns16550_context *) console_device_table[i].context;
+
+    ctx->clock = BSP_bus_frequency;
+
+    #ifdef HAS_UBOOT
+      ctx->initial_baud = bsp_uboot_board_info.bi_baudrate;
+    #endif
+  }
+
+  /* Initialize exception handler */
+#ifndef BSP_DATA_CACHE_ENABLED
+  ppc_exc_cache_wb_check = 0;
+#endif
+  ppc_exc_initialize(
+    (uintptr_t) bsp_section_work_begin,
+    rtems_configuration_get_interrupt_stack_size()
+  );
+
+  /* Install default handler for the decrementer exception */
+  sc = ppc_exc_set_handler( ASM_DEC_VECTOR, mpc83xx_decrementer_exception_handler);
+  if (sc != RTEMS_SUCCESSFUL) {
+    rtems_panic("cannot install decrementer exception handler");
+  }
+
+  /* Initalize interrupt support */
+  bsp_interrupt_initialize();
+
+#ifdef SHOW_MORE_INIT_SETTINGS
+  printk("Exit from bspstart\n");
+#endif
+}