/*
** 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) 1989-2001.
** 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.
**
** $Id$
**
** Modification History:
** 12/10/01 A.Ferrer, NASA/GSFC, Code 582
** Set interrupt mask to 0xAF00 (Line 139).
*/
#include <string.h>
#include <bsp.h>
#include <rtems/libio.h>
#include <rtems/libcsupport.h>
#include <libcpu/mongoose-v.h>
/*
* 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;
char *rtems_progname;
/*
* 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 HeapBase;
extern int HeapSize;
void *heapStart = &HeapBase;
unsigned long heapSize = (unsigned long)&HeapSize;
unsigned long ramSpace;
bsp_libc_init(heapStart, (unsigned32) heapSize, 0);
#ifdef RTEMS_DEBUG
rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
#endif
}
/*
* bsp_start
*
* This routine does the bulk of the system initialization.
*/
void bsp_start( void )
{
extern int WorkspaceBase;
extern void mips_install_isr_entries();
/* Configure Number of Register Caches */
Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */
Cpu_table.postdriver_hook = bsp_postdriver_hook;
Cpu_table.interrupt_stack_size = 4096;
/* HACK -- tied to value linkcmds */
if ( BSP_Configuration.work_space_size > (4096*1024) )
_sys_exit( 1 );
BSP_Configuration.work_space_start = (void *) &WorkspaceBase;
/* mask off any interrupts */
MONGOOSEV_WRITE( MONGOOSEV_PERIPHERAL_FUNCTION_INTERRUPT_MASK_REGISTER, 0 );
MONGOOSEV_WRITE( MONGOOSEV_WATCHDOG, 0xA0 );
/* reset the config register & clear any pending peripheral interrupts */
MONGOOSEV_WRITE( MONGOOSEV_PERIPHERAL_COMMAND_REGISTER, 0 );
MONGOOSEV_WRITE( MONGOOSEV_PERIPHERAL_COMMAND_REGISTER, MONGOOSEV_UART_CMD_RESET_BOTH_PORTS );
MONGOOSEV_WRITE( MONGOOSEV_PERIPHERAL_COMMAND_REGISTER, 0 );
/* reset both timers */
MONGOOSEV_WRITE_REGISTER( MONGOOSEV_TIMER1_BASE, MONGOOSEV_TIMER_INITIAL_COUNTER_REGISTER, 0xffffffff );
MONGOOSEV_WRITE_REGISTER( MONGOOSEV_TIMER1_BASE, MONGOOSEV_TIMER_CONTROL_REGISTER, 0);
MONGOOSEV_WRITE_REGISTER( MONGOOSEV_TIMER2_BASE, MONGOOSEV_TIMER_INITIAL_COUNTER_REGISTER, 0xffffffff );
MONGOOSEV_WRITE_REGISTER( MONGOOSEV_TIMER2_BASE, MONGOOSEV_TIMER_CONTROL_REGISTER, 0);
/* clear any pending interrupts */
MONGOOSEV_WRITE( MONGOOSEV_PERIPHERAL_STATUS_REGISTER, 0xffffffff );
/* clear any writable bits in the cause register */
mips_set_cause( 0 );
/* set interrupt mask, but globally off. */
/*
** Bit 15 | Bit 14 | Bit 13 | Bit 12 | Bit 11 | Bit 10 | Bit 9 | Bit 8 |
** periph | unused | FPU | unused | timer2 | timer1 | swint1 | swint2 |
** extern | | | | | | | |
**
** 1 0 1 0 0 1 0 0
**
** 0x8C00 Enable only internal Mongoose V timers.
** 0xA400 Enable Peripherial ints, FPU and timer1
*/
mips_set_sr( (SR_CU0 | SR_CU1 | 0xA400) );
mips_install_isr_entries();
}
void clear_cache( void *address, size_t n )
{
}
/* Structure filled in by get_mem_info. Only the size field is
actually used (to clear bss), so the others aren't even filled in. */
struct s_mem
{
unsigned int size;
unsigned int icsize;
unsigned int dcsize;
};
extern unsigned32 _RamSize;
void get_mem_info ( struct s_mem *mem )
{
mem->size = (unsigned32)&_RamSize;
}
