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/*

 *  This routine starts the application.  It includes application,

 *  board, and monitor specific initialization and configuration.

 *  The generic CPU dependent initialization has been performed

 *  before this routine is invoked.

 *

 *  COPYRIGHT (c) 1989-1999.

 *  On-Line Applications Research Corporation (OAR).

 *

 *  The license and distribution terms for this file may be

 *  found in the file LICENSE in this distribution or at

 *  http://www.OARcorp.com/rtems/license.html.

 *

 *  $Id: bspstart.c,v 1.2 2001-09-27 11:59:45 chris Exp $

 */

#include <rtems.h>

#include <bsp.h>

#include <rtems/libio.h>

#include <libcsupport.h>

#include <string.h>

extern rtems_configuration_table  Configuration;

rtems_configuration_table BSP_Configuration;

rtems_cpu_table           Cpu_table;

int cpu_number;

#define WORKSPACE_SIZE (1024 * 1024)

rtems_unsigned8   MY_WORK_SPACE[ WORKSPACE_SIZE ];

/*

 * 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

 */

rtems_unsigned32 CPU_HPPA_CLICKS_PER_TICK;

#if SIMHPPA_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 idle

 */

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_HPPA_CLICKS_PER_TICK;

        fast_clock = CPU_HPPA_CLICKS_PER_TICK / 0x100;

        if (fast_clock == 0)    /* who? me?  pathological?  never! */

            fast_clock++;

    }

    /*

     * Checking for 'name' field of 'IDLE' is not the best/safest,

     * but its the best we could think of at the moment.

     */

    if (heir_task == _Thread_Idle)

        CPU_HPPA_CLICKS_PER_TICK = fast_clock;

    else if (current_task == _Thread_Idle)

        CPU_HPPA_CLICKS_PER_TICK = normal_clock;

}

#endif

/*

 *  Use the shared implementations of the following routines

 */

void bsp_postdriver_hook(void);

void bsp_libc_init( void *, unsigned32, int );

/*

 *  Function:   bsp_pretasking_hook

 *  Created:    95/03/10

 *

 *  Description:

 *      BSP pretasking hook.  Called just before drivers are initialized.

 *      Used to setup libc and install any BSP extensions.

 *

 *  Notes:

 *      Must not use libc (to do io) from here, since drivers are

 *      not yet initialized.

 */

void bsp_pretasking_hook(void)

{

    extern int end;

    rtems_unsigned32        heap_start;

    heap_start = (rtems_unsigned32) &end;

    if (heap_start & (CPU_ALIGNMENT-1))

        heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);

    bsp_libc_init((void *) heap_start, 64 * 1024, 0);

    /*

     * on MP systems, always use the print buffer

     *  instead of the (broken) system calls

     */

    if (BSP_Configuration.User_multiprocessing_table)

        use_print_buffer = 1;

#ifdef SIMHPPA_ROM

    use_print_buffer = 1;

#endif

#if SIMHPPA_FAST_IDLE

    /*

     * Install the fast idle task switch extension

     *

     * on MP systems, might now want to do this; it confuses at least

     * one test (mp06)

     */

#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

}

void bsp_start(void)

{

    /*

     * Set cpu_number to accurately reflect our cpu number

     */

#ifdef hppa7200

    /*

     * Use HPPA_DR0 if supported

     */

    {

        int dr0;

        HPPA_ASM_MFCPU(HPPA_DR0, dr0);

        cpu_number = (dr0 >> 4) & 0x7;

    }

#else

    if (Configuration.User_multiprocessing_table)

        cpu_number = Configuration.User_multiprocessing_table->node - 1;

    else

        cpu_number = 0;

#endif

    BSP_Configuration.work_space_start = (void *)MY_WORK_SPACE;

    if (BSP_Configuration.work_space_size)

        BSP_Configuration.work_space_size = WORKSPACE_SIZE;

    /*

     * Set up our hooks

     * Make sure libc_init is done before drivers init'd so that

     * they can use atexit()

     */

    Cpu_table.pretasking_hook = bsp_pretasking_hook;    /* init libc, etc. */

    Cpu_table.postdriver_hook = bsp_postdriver_hook;    /* register drivers */

    /*

     *  Don't zero out the workspace.  The simulator did it for us.

     */

    Cpu_table.do_zero_of_workspace = FALSE;

    Cpu_table.interrupt_stack_size = CONFIGURE_INTERRUPT_STACK_MEMORY;

    /*

     * Set this artificially low for the simulator

     */

    Cpu_table.itimer_clicks_per_microsecond = 1;

#if 0

    /*

     * Commented by DIVISION INC.  External interrupt

     * processing is now divorced from RTEMS for HPPA.

     */

    /*

     * Determine the external interrupt processing order

     * the external interrupt handler walks thru this table, in

     * order checking for posted interrupts.

     */

    Cpu_table.external_interrupts = 0;

    Cpu_table.external_interrupt[ Cpu_table.external_interrupts ] =

                                   HPPA_INTERRUPT_EXTERNAL_INTERVAL_TIMER;

    Cpu_table.external_interrupts++;

    if ( Configuration.User_multiprocessing_table ) {

      Cpu_table.external_interrupt[ Cpu_table.external_interrupts ] =

                                               HPPA_INTERRUPT_EXTERNAL_10;

      Cpu_table.external_interrupts++;

    }

#endif

#if SIMHPPA_FAST_IDLE

    /*

     * Add 1 extension for fast idle

     */

    BSP_Configuration.maximum_extensions++;

#endif

    /*

     * Set the "clicks per tick" for the simulator

     *  used by libcpu/hppa/clock/clock.c to schedule interrupts

     *

     * Set it only if 0 to allow for simulator setting it via script

     *   on test startup.

     */

    if (CPU_HPPA_CLICKS_PER_TICK == 0)

        CPU_HPPA_CLICKS_PER_TICK = 0x4000;

}