new files

1 files changed, 357 insertions, 0 deletions

diff --git a/c/src/lib/libbsp/powerpc/psim/startup/bspstart.c b/c/src/lib/libbsp/powerpc/psim/startup/bspstart.c
new file mode 100644
index 0000000000..91bdae7fba
--- /dev/null
+++ b/c/src/lib/libbsp/powerpc/psim/startup/bspstart.c
@@ -0,0 +1,357 @@
+/*  bspstart.c
+ *
+ *  This set of routines starts the application.  It includes application,
+ *  board, and monitor specific initialization and configuration.
+ *  The generic CPU dependent initialization has been performed
+ *  before any of these are invoked.
+ *
+ *  Called by RTEMS::RTEMS constructor in rtems-ctor.cc
+ *
+ *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994, 1997.
+ *  On-Line Applications Research Corporation (OAR).
+ *  All rights assigned to U.S. Government, 1994.
+ *
+ *  This material may be reproduced by or for the U.S. Government pursuant
+ *  to the copyright license under the clause at DFARS 252.227-7013.  This
+ *  notice must appear in all copies of this file and its derivatives.
+ *
+ *  $Id$
+ */
+
+#include <bsp.h>
+#include <rtems/libio.h>
+
+#include <libcsupport.h>
+
+#include <string.h>
+#include <fcntl.h>
+
+#ifdef STACK_CHECKER_ON
+#include <stackchk.h>
+#endif
+
+/*
+ *  The original table from the application and our copy of it with
+ *  some changes.
+ */
+ 
+extern rtems_configuration_table  Configuration;
+rtems_configuration_table         BSP_Configuration;
+
+rtems_cpu_table   Cpu_table;
+rtems_unsigned32  bsp_isr_level;
+
+/*
+ *  Tells us where to put the workspace in case remote debugger is present.
+ */
+
+#if 0
+extern rtems_unsigned32  rdb_start;
+#endif
+
+/*
+ * Amount to increment itimer by each pass
+ * It is a variable instead of a #define to allow the 'looptest'
+ * script to bump it without recompiling rtems
+ *
+ *  NOTE:  This is based on the PA-RISC simulator.  I don't know if we
+ *         can actually pull this trick on the PPC simulator.
+ */
+
+rtems_unsigned32 CPU_PPC_CLICKS_PER_TICK;
+
+#if PSIM_FAST_IDLE
+
+/*
+ * Many of the tests are very slow on the simulator because they have
+ * have 5 second delays hardwired in.
+ *
+ * Try to speed those tests up by speeding up the clock when in the idle task.
+ *
+ *  NOTE:  At the current setting, 5 second delays in the tests take 
+ *         approximately 5 seconds of wall time. 
+ */
+
+rtems_extension
+fast_idle_switch_hook(rtems_tcb *current_task,
+                      rtems_tcb *heir_task)
+{
+    static rtems_unsigned32 normal_clock = ~0;
+    static rtems_unsigned32 fast_clock;
+
+    /* init our params on first call */
+    if (normal_clock == (rtems_unsigned32) ~0)
+    {
+        normal_clock = CPU_PPC_CLICKS_PER_TICK;
+        fast_clock = 10000;
+#if 0
+        fast_clock = CPU_PPC_CLICKS_PER_TICK / 0x10 ;
+#endif
+        if (fast_clock == 0)    /* handle pathological case */
+            fast_clock++;
+    }
+
+    /*
+     * Run the clock faster when idle is in place.
+     */
+
+    if (heir_task == _Thread_Idle)
+        CPU_PPC_CLICKS_PER_TICK = fast_clock;
+    else if (current_task == _Thread_Idle)
+        CPU_PPC_CLICKS_PER_TICK = normal_clock;
+}
+
+#endif
+
+/*
+ *  bsp_libc_init
+ *
+ *  Initialize whatever libc we are using called from bsp_postdriver_hook.
+ */
+
+void bsp_libc_init(void)
+{
+  extern int end;
+  rtems_unsigned32 heap_start;
+  rtems_unsigned32 heap_size;
+
+  heap_start = (rtems_unsigned32) &end;
+  if (heap_start & (CPU_ALIGNMENT-1))
+    heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
+
+  heap_size = BSP_Configuration.work_space_start - (void *)&end;
+  heap_size &= 0xfffffff0;  /* keep it as a multiple of 16 bytes */
+
+  RTEMS_Malloc_Initialize((void *) heap_start, heap_size, 0);
+
+  /*
+   *  Init the RTEMS libio facility to provide UNIX-like system
+   *  calls for use by newlib (ie: provide __rtems_open, __rtems_close, etc)
+   *  Uses malloc() to get area for the iops, so must be after malloc init
+   */
+ 
+  rtems_libio_init();
+ 
+  /*
+   * Set up for the libc handling.
+   */
+ 
+  if (BSP_Configuration.ticks_per_timeslice > 0)
+    libc_init(1);                /* reentrant if possible */
+  else
+    libc_init(0);                /* non-reentrant */
+
+}
+
+
+/*
+ *  bsp_pretasking_hook
+ *
+ *  BSP pretasking hook.  Called just before drivers are initialized.
+ *  Used to setup libc and install any BSP extensions.
+ */
+
+void bsp_pretasking_hook(void)
+{
+  bsp_libc_init();
+
+#if PSIM_FAST_IDLE
+  /*
+   *  Install the fast idle task switch extension
+   *
+   *  On MP systems, might not want to do this; it confuses at least
+   *  one test (mp06) on the PA-RISC simulator
+   */
+
+#if 0
+  if (BSP_Configuration.User_multiprocessing_table == 0)
+#endif
+  {
+    rtems_extensions_table  fast_idle_extension;
+    rtems_id                extension_id;
+    rtems_status_code       rc;
+
+    memset(&fast_idle_extension, 0, sizeof(fast_idle_extension));
+
+    fast_idle_extension.thread_switch  = fast_idle_switch_hook;
+
+    rc = rtems_extension_create(
+      rtems_build_name('F', 'D', 'L', 'E'),
+      &fast_idle_extension, 
+      &extension_id
+    );
+    if (rc != RTEMS_SUCCESSFUL)
+      rtems_fatal_error_occurred(rc);
+  }
+#endif
+
+
+#ifdef STACK_CHECKER_ON
+  /*
+   *  Initialize the stack bounds checker
+   *  We can either turn it on here or from the app.
+   */
+
+  Stack_check_Initialize();
+#endif
+
+#ifdef RTEMS_DEBUG
+  rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
+#endif
+
+}
+
+/*
+ *  Use the shared bsp_postdriver_hook() implementation 
+ */
+ 
+void bsp_postdriver_hook(void);
+
+/*
+ *  bsp_start
+ *
+ *  This routine does the bulk of the system initialization.
+ */
+
+void bsp_start( void )
+{
+  unsigned char *work_space_start;
+
+#if 0
+  /* 
+   * Set MSR to show vectors at 0 XXX
+   */
+  _CPU_MSR_Value( msr_value );
+  msr_value &= ~PPC_MSR_EP;
+  _CPU_MSR_SET( msr_value );
+#endif
+
+  /*
+   * Set up our hooks
+   * Make sure libc_init is done before drivers initialized so that
+   * they can use atexit()
+   */
+
+  Cpu_table.pretasking_hook = bsp_pretasking_hook;    /* init libc, etc. */
+
+  Cpu_table.predriver_hook = NULL; /* bsp_spurious_initialize;*/
+
+  Cpu_table.postdriver_hook = bsp_postdriver_hook;
+
+  Cpu_table.idle_task = NULL;  /* do not override system IDLE task */
+
+  /*
+   *  PSIM does zero out memory BUT only when IT begins execution.  Thus
+   *  if we want to have a clean slate in the workspace each time we
+   *  begin execution of OUR application, then we must zero the workspace.
+   */
+
+  Cpu_table.do_zero_of_workspace = FALSE;
+
+  /*
+   *  This should be enough interrupt stack.
+   */
+
+  Cpu_table.interrupt_stack_size = (12 * 1024);
+
+  /*
+   *  SIS does not support MP configurations so there is really no way
+   *  to check this out.
+   */
+
+  Cpu_table.extra_mpci_receive_server_stack = 0;
+
+  /*
+   *  The monitor likes the exception table to be at 0x0.
+   */
+
+  Cpu_table.exceptions_in_RAM = TRUE;
+
+  /*
+   *  Copy the table and allocate memory for the RTEMS Workspace
+   */
+
+  BSP_Configuration = Configuration;
+
+#if defined(RTEMS_POSIX_API)
+  BSP_Configuration.work_space_size *= 3;
+#endif
+
+
+#if 0
+  work_space_start = 
+    (unsigned char *)rdb_start - BSP_Configuration.work_space_size;
+#endif
+
+  work_space_start = 
+    (unsigned char *)&RAM_END - BSP_Configuration.work_space_size;
+
+  if ( work_space_start <= (unsigned char *)&end ) {
+    DEBUG_puts( "bspstart: Not enough RAM!!!\n" );
+    bsp_cleanup();
+  }
+
+  BSP_Configuration.work_space_start = work_space_start;
+
+  /*
+   * Add 1 region for RTEMS Malloc
+   */
+
+  BSP_Configuration.RTEMS_api_configuration->maximum_regions++;
+
+#ifdef RTEMS_NEWLIB
+  /*
+   * Add 1 extension for newlib libc
+   */
+
+  BSP_Configuration.maximum_extensions++;
+#endif
+
+#ifdef STACK_CHECKER_ON
+  /*
+   * Add 1 extension for stack checker
+   */
+
+  BSP_Configuration.maximum_extensions++;
+#endif
+
+#if PSIM_FAST_IDLE
+  /*
+   * Add 1 extension for fast idle
+   */
+
+  BSP_Configuration.maximum_extensions++;
+#endif
+
+  /*
+   * Add 1 extension for MPCI_fatal
+   */
+
+  if (BSP_Configuration.User_multiprocessing_table)
+    BSP_Configuration.maximum_extensions++;
+
+  /*
+   * Set the "clicks per tick" for the simulator
+   *  used by XXX/clock/clock.c to schedule interrupts
+   *
+   *  NOTE: On psim, each click of the decrementer register corresponds
+   *        to 1 instruction.  By setting this to 100, we are indicating
+   *        that we are assuming it can execute 100 instructions per
+   *        microsecond.  This corresponds to sustaining 1 instruction
+   *        per cycle at 100 Mhz.  Whether this is a good guess or not
+   *        is anyone's guess.
+   */
+
+  {
+    extern int PSIM_INSTRUCTIONS_PER_MICROSECOND;
+
+    CPU_PPC_CLICKS_PER_TICK = BSP_Configuration.microseconds_per_tick * 
+      (int) &PSIM_INSTRUCTIONS_PER_MICROSECOND;
+  }
+
+  /*
+   *  Initialize RTEMS. main() will finish it up and start multitasking.
+   */
+
+  rtems_libio_config( &BSP_Configuration, BSP_LIBIO_MAX_FDS );
+}