/* bsp_start()
*
* 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.
*
* INPUT: NONE
*
* OUTPUT: NONE
*
* Author: Thomas Doerfler <td@imd.m.isar.de>
* IMD Ingenieurbuero fuer Microcomputertechnik
*
* COPYRIGHT (c) 1998 by IMD
*
* Changes from IMD are covered by the original distributions terms.
* This file has been derived from the papyrus BSP:
*
* Author: Andrew Bray <andy@i-cubed.co.uk>
*
* COPYRIGHT (c) 1995 by i-cubed ltd.
*
* To anyone who acknowledges that this file is provided "AS IS"
* without any express or implied warranty:
* permission to use, copy, modify, and distribute this file
* for any purpose is hereby granted without fee, provided that
* the above copyright notice and this notice appears in all
* copies, and that the name of i-cubed limited not be used in
* advertising or publicity pertaining to distribution of the
* software without specific, written prior permission.
* i-cubed limited makes no representations about the suitability
* of this software for any purpose.
*
* Modifications for spooling console driver and control of memory layout
* with linker command file by
* Thomas Doerfler <td@imd.m.isar.de>
* for these modifications:
* COPYRIGHT (c) 1997 by IMD, Puchheim, Germany.
*
* To anyone who acknowledges that this file is provided "AS IS"
* without any express or implied warranty:
* permission to use, copy, modify, and distribute this file
* for any purpose is hereby granted without fee, provided that
* the above copyright notice and this notice appears in all
* copies. IMD makes no representations about the suitability
* of this software for any purpose.
*
* Derived from c/src/lib/libbsp/no_cpu/no_bsp/startup/bspstart.c:
*
* COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
* On-Line Applications Research Corporation (OAR).
*
* Modifications for PPC405GP by Dennis Ehlin
* Modifications for Virtex5 by Richard Claus <claus@slac.stanford.edu>
*/
#include <rtems.h>
#include <rtems/config.h>
#include <rtems/bspIo.h>
#include <rtems/libio.h>
#include <rtems/libcsupport.h>
#include <libcpu/cpuIdent.h>
#include <libcpu/spr.h>
#include <bsp.h>
#include <bsp/vectors.h>
#include <bsp/bootcard.h>
#include <bsp/irq.h>
#include <string.h>
#include <fcntl.h>
#define DO_DOWN_ALIGN(x,a) ((x) & ~((a)-1))
#define DO_UP_ALIGN(x,a) DO_DOWN_ALIGN(((x) + (a) - 1 ),a)
#define CPU_DOWN_ALIGN(x) DO_DOWN_ALIGN(x, CPU_ALIGNMENT)
#define CPU_UP_ALIGN(x) DO_UP_ALIGN(x, CPU_ALIGNMENT)
/* Defined in linkcmds linker script */
LINKER_SYMBOL(RamBase);
LINKER_SYMBOL(RamSize);
LINKER_SYMBOL(__bsp_ram_start);
LINKER_SYMBOL(__bsp_ram_end);
LINKER_SYMBOL(__rtems_end);
LINKER_SYMBOL(_stack);
LINKER_SYMBOL(StackSize);
LINKER_SYMBOL(__stack_base);
LINKER_SYMBOL(WorkAreaBase);
LINKER_SYMBOL(MsgAreaBase);
LINKER_SYMBOL(MsgAreaSize);
LINKER_SYMBOL(__phy_ram_end);
LINKER_SYMBOL(bsp_exc_vector_base);
/* Expected by clock.c */
uint32_t bsp_clicks_per_usec;
bool bsp_timer_internal_clock; /* true, when timer runs with CPU clk */
uint32_t bsp_timer_least_valid;
uint32_t bsp_timer_average_overhead;
/*
* Bus Frequency
*/
unsigned int BSP_bus_frequency;
/*
* processor clock frequency
*/
unsigned int BSP_processor_frequency;
/*
* Time base divisior (bus freq / TB clock)
*/
unsigned int BSP_time_base_divisor;
/*
* Provide weak aliases so that RTEMS distribution builds
*/
static void _noopfun(void) {}
void app_bsp_start(void)
__attribute__(( weak, alias("_noopfun") ));
void app_bsp_pretasking_hook(void)
__attribute__(( weak, alias("_noopfun") ));
void app_bsp_predriver_hook(void)
__attribute__(( weak, alias("_noopfun") ));
static char* bspMsgBuffer = (char*)MsgAreaBase;
static void __bsp_outchar_to_memory(char c)
{
static char* msgBuffer = (char*)MsgAreaBase;
*msgBuffer++ = c;
if (msgBuffer >= &bspMsgBuffer[(int)MsgAreaSize]) msgBuffer = bspMsgBuffer;
*msgBuffer = 0x00; /* Overwrite next location to show EOM */
}
void BSP_ask_for_reset(void)
{
printk("\nSystem stopped, issue RESET");
for(;;);
}
void BSP_panic(char *s)
{
__attribute__((unused)) rtems_interrupt_level level;
rtems_interrupt_disable(level);
printk("\n%s PANIC %s\n", rtems_get_version_string(), s);
BSP_ask_for_reset();
}
void _BSP_Fatal_error(unsigned int v)
{
__attribute__((unused)) rtems_interrupt_level level;
rtems_interrupt_disable(level);
printk("\n%s FATAL ERROR %x\n", rtems_get_version_string(), v);
BSP_ask_for_reset();
}
/*===================================================================*/
/*
* BSP start routine. Called by boot_card().
*
* This routine does the bulk of the system initialization.
*/
void bsp_start(void)
{
uintptr_t intrStackStart;
uintptr_t intrStackSize;
ppc_cpu_id_t myCpu;
ppc_cpu_revision_t myCpuRevision;
/* Set the character output function; The application may override this */
BSP_output_char = __bsp_outchar_to_memory;
printk("RTEMS %s\n", rtems_get_version_string());
/*
* Get CPU identification dynamically. Note that the get_ppc_cpu_type()
* function stores the result in global variables so that it can be used later...
*/
myCpu = get_ppc_cpu_type();
myCpuRevision = get_ppc_cpu_revision();
printk("CPU: 0x%04x, Revision: 0x%04x = %d, Name: %s\n",
myCpu, myCpuRevision, myCpuRevision, get_ppc_cpu_type_name(myCpu));
/*
* Initialize the device driver parameters
*/
/* For mpc6xx clock driver: */
BSP_bus_frequency = 465000000;
BSP_processor_frequency = 465000000; /* Measured with a DPM 440 2012/8/13 */
BSP_time_base_divisor = 1000;
/* Timebase register ticks/microsecond; The application may override these */
bsp_clicks_per_usec = BSP_bus_frequency/(BSP_time_base_divisor * 1000);
bsp_timer_internal_clock = true;
bsp_timer_average_overhead = 2;
bsp_timer_least_valid = 3;
/*
* Initialize the interrupt related settings.
*/
intrStackStart = CPU_UP_ALIGN((uint32_t)__bsp_ram_start);
intrStackSize = rtems_configuration_get_interrupt_stack_size();
ppc_exc_initialize(PPC_INTERRUPT_DISABLE_MASK_DEFAULT,
intrStackStart,
intrStackSize);
/* Let the user know what parameters we were compiled with */
printk(" Base/Start End Size\n"
"RAM: 0x%08x 0x%x\n"
"RTEMS: 0x%08x\n"
"Interrupt Stack: 0x%08x 0x%x\n"
"Stack: 0x%08x 0x%08x 0x%x\n"
"Workspace: 0x%08x 0x%08x\n"
"MsgArea: 0x%08x 0x%x\n"
"Physical RAM 0x%08x\n",
(uint32_t)RamBase, (uint32_t)RamSize,
(uint32_t)__rtems_end,
intrStackStart, intrStackSize,
(uint32_t)__stack_base, (uint32_t)_stack, (uint32_t)StackSize,
(uint32_t)WorkAreaBase, (uint32_t)__bsp_ram_end,
(uint32_t)MsgAreaBase, (uint32_t)MsgAreaSize,
(uint32_t)__phy_ram_end);
/*
* Initialize RTEMS IRQ system
*/
BSP_rtems_irq_mngt_init(0);
/* Continue with application-specific initialization */
app_bsp_start();
}
/*
* BSP pretasking hook. Called just before drivers are initialized.
* Used to setup libc and install any BSP extensions.
*
* Must not use libc (to do io) from here, since drivers are not yet
* initialized.
*/
void bsp_pretasking_hook(void)
{
app_bsp_pretasking_hook();
}
/*
* BSP predriver hook. Called by boot_card() just before drivers are
* initialized. Clear out any stale interrupts here.
*/
void bsp_predriver_hook(void)
{
app_bsp_predriver_hook();
}
