/*
* 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.
*
* COPYRIGHT (c) 1989-2008.
* 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.rtems.com/license/LICENSE.
*
* $Id$
*/
#include <string.h>
#include <fcntl.h>
#include <bsp.h>
#include <bsp/irq.h>
#include <bsp/bootcard.h>
#include <rtems/bspIo.h>
#include <rtems/powerpc/powerpc.h>
#include <libcpu/powerpc-utility.h>
#include <libcpu/raw_exception.h>
#include <bsp/irq-generic.h>
#include <bsp/ppc_exc_bspsupp.h>
#include <libcpu/cpuIdent.h>
#include <libcpu/bat.h>
#include <libcpu/spr.h>
/*
* CPU Bus Frequency
*/
unsigned int BSP_bus_frequency;
/*
* Driver configuration parameters
*/
uint32_t bsp_clicks_per_usec;
/*
* Memory on this board.
*/
extern char RamSize[];
extern char bsp_interrupt_stack_start[];
extern char bsp_interrupt_stack_end[];
extern char bsp_interrupt_stack_size[];
uint32_t BSP_mem_size = (uint32_t)RamSize;
/*
* Time base divisior (how many tick for 1 second).
*/
unsigned int BSP_time_base_divisor;
/* Default decrementer exception handler */
static int default_decrementer_exception_handler( BSP_Exception_frame *frame, unsigned number)
{
ppc_set_decrementer_register(UINT32_MAX);
return 0;
}
/*
* bsp_start
*
* This routine does the bulk of the system initialization.
*/
void bsp_start( void )
{
uint32_t intrStackStart;
uint32_t intrStackSize;
int rv = 0;
rtems_status_code sc;
/*
* Note we can not get CPU identification dynamically, so
* force current_ppc_cpu.
*/
current_ppc_cpu = PPC_PSIM;
/*
* initialize the device driver parameters
*/
/* BSP_bus_frequency = (unsigned int)&PSIM_INSTRUCTIONS_PER_MICROSECOND; */
/* bsp_clicks_per_usec = BSP_bus_frequency; */
/* BSP_time_base_divisor = 1; */
/*
* Initialize the interrupt related settings.
*/
intrStackStart = (uint32_t) bsp_interrupt_stack_start;
intrStackSize = (uint32_t) bsp_interrupt_stack_size;
BSP_mem_size = (uint32_t )RamSize;
/*
* Initialize default raw exception handlers.
*/
ppc_exc_initialize(
PPC_INTERRUPT_DISABLE_MASK_DEFAULT,
intrStackStart,
intrStackSize
);
/* Install default handler for the decrementer exception */
rv = ppc_exc_set_handler( ASM_DEC_VECTOR, default_decrementer_exception_handler);
if (rv < 0) {
BSP_panic( "Cannot install decrementer exception handler!\n");
}
/* Initalize interrupt support */
sc = bsp_interrupt_initialize();
if (sc != RTEMS_SUCCESSFUL) {
BSP_panic( "Cannot intitialize interrupt support\n");
}
#if 0
/*
* Setup BATs and enable MMU
*/
/* Memory */
setdbat(0, 0x0<<24, 0x0<<24, 2<<24, _PAGE_RW);
setibat(0, 0x0<<24, 0x0<<24, 2<<24, 0);
/* PCI */
setdbat(1, 0x8<<24, 0x8<<24, 1<<24, IO_PAGE);
setdbat(2, 0xc<<24, 0xc<<24, 1<<24, IO_PAGE);
_write_MSR(_read_MSR() | MSR_DR | MSR_IR);
asm volatile("sync; isync");
#endif
}
