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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* 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).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <string.h>
#include <fcntl.h>
#include <rtems/counter.h>
#include <libcpu/bat.h>
#include <libcpu/spr.h>
#include <libcpu/powerpc-utility.h>
#include <bsp.h>
#include <bsp/irq.h>
#include <bsp/vectors.h>
#include <bsp/bootcard.h>
#include <bsp/irq-generic.h>
/*
* CPU Bus Frequency
*/
unsigned int BSP_bus_frequency;
/* Configuration parameter for clock driver */
uint32_t bsp_time_base_frequency;
/* Legacy */
uint32_t bsp_clicks_per_usec;
/*
* Memory on this board.
*/
extern char RamSize[];
uint32_t BSP_mem_size = (uint32_t)RamSize;
/* Default decrementer exception handler */
static int default_decrementer_exception_handler( BSP_Exception_frame *frame, unsigned number)
{
ppc_set_decrementer_register(UINT32_MAX);
return 0;
}
uint32_t _CPU_Counter_frequency(void)
{
return bsp_time_base_frequency;
}
/*
* bsp_start
*
* This routine does the bulk of the system initialization.
*/
void bsp_start( void )
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
/*
* Note we can not get CPU identification dynamically, so
* force current_ppc_cpu.
*/
current_ppc_cpu = PPC_PSIM;
/*
* initialize the device driver parameters
* assume we are running with 20MHz bus
* this should speed up some tests :-)
*/
BSP_bus_frequency = 20;
bsp_time_base_frequency = 20000000;
bsp_clicks_per_usec = BSP_bus_frequency;
BSP_mem_size = (uint32_t )RamSize;
ppc_exc_initialize();
/* Install default handler for the decrementer exception */
sc = ppc_exc_set_handler( ASM_DEC_VECTOR, default_decrementer_exception_handler);
if (sc != RTEMS_SUCCESSFUL) {
rtems_panic("cannot install decrementer exception handler");
}
/* Initalize interrupt support */
bsp_interrupt_initialize();
#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
}
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