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/* 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.
*
* The MPC860 specific stuff was written by Jay Monkman (jmonkman@frasca.com)
*
* 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.
*
* $Id$
*/
#include <string.h>
#include <bsp.h>
#include <bsp/irq.h>
#include <rtems/libio.h>
#include <rtems/libcsupport.h>
#include <info.h>
#include <libcpu/cpuIdent.h>
#include <rtems/bspIo.h>
boardinfo_t M860_binfo;
/*
* The original table from the application and our copy of it with
* some changes.
*/
extern rtems_configuration_table Configuration;
extern unsigned long intrStackPtr;
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 );
void BSP_panic(char *s)
{
printk("%s PANIC %s\n",_RTEMS_version, s);
__asm__ __volatile ("sc");
}
void _BSP_Fatal_error(unsigned int v)
{
printk("%s PANIC ERROR %x\n",_RTEMS_version, v);
__asm__ __volatile ("sc");
}
/*
* 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;
/*
* Let's check to see if the size of M860_binfo is what
* it should be. It might not be if the info.h files
* for RTEMS and the bootloader define boardinfo_t
* differently.
*/
/* Oops. printf() won't work yet, since the console is not initialized.
I should probably find some way of doing this though.
if (M860_binfo.size != sizeof(boardinfo_t)) {
printf("The size of the Board Info Block appears to be incorrect.\n");
printf(" This could occur if the 'info.h' files for RTEMS and the\n");
printf(" bootloader differ in their definition of boardinfo_t\n");
}
*/
heap_start = (rtems_unsigned32) &_end;
/* Align the heap on a natural boundary (4 bytes?) */
if (heap_start & (CPU_ALIGNMENT-1)) {
heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
}
/* set up a 256K heap */
bsp_libc_init((void *) heap_start, 256 * 1024, 0);
#ifdef RTEMS_DEBUG
rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
#endif
}
void bsp_start(void)
{
extern int _end;
rtems_unsigned32 heap_start;
rtems_unsigned32 ws_start;
ppc_cpu_id_t myCpu;
ppc_cpu_revision_t myCpuRevision;
register unsigned char* intrStack;
register unsigned int intrNestingLevel = 0;
extern void cpu_init(void);
/*
* Get CPU identification dynamically. Note that the get_ppc_cpu_type() function
* store the result in global variables so that it can be used latter...
*/
myCpu = get_ppc_cpu_type();
myCpuRevision = get_ppc_cpu_revision();
cpu_init();
mmu_init();
/*
* Initialize some SPRG registers related to irq handling
*/
intrStack = (((unsigned char*)&intrStackPtr) - CPU_MINIMUM_STACK_FRAME_SIZE);
asm volatile ("mtspr 273, %0" : "=r" (intrStack) : "0" (intrStack));
asm volatile ("mtspr 272, %0" : "=r" (intrNestingLevel) : "0" (intrNestingLevel));
/*
* Install our own set of exception vectors
*/
initialize_exceptions();
/*
* Allocate the memory for the RTEMS Work Space. This can come from
* a variety of places: hard coded address, malloc'ed from outside
* RTEMS world (e.g. simulator or primitive memory manager), or (as
* typically done by stock BSPs) by subtracting the required amount
* of work space from the last physical address on the CPU board.
*/
/*
* Need to "allocate" the memory for the RTEMS Workspace and
* tell the RTEMS configuration where it is. This memory is
* not malloc'ed. It is just "pulled from the air".
*/
heap_start = (rtems_unsigned32) &_end;
if (heap_start & (CPU_ALIGNMENT-1))
heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
ws_start = heap_start + (256 * 1024);
if (ws_start & ((512 * 1024) - 1)) { /* align to 512K boundary */
ws_start = (ws_start + (512 * 1024)) & ~((512 * 1024) - 1);
}
BSP_Configuration.work_space_start = (void *)ws_start;
BSP_Configuration.work_space_size = 512 * 1024;
/*
* initialize the CPU table for this BSP
*/
Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */
Cpu_table.postdriver_hook = bsp_postdriver_hook;
Cpu_table.interrupt_stack_size = CONFIGURE_INTERRUPT_STACK_MEMORY;
Cpu_table.clicks_per_usec = 1; /* for 4MHz extclk */
Cpu_table.serial_per_sec = 10000000;
Cpu_table.serial_external_clock = 1;
Cpu_table.serial_xon_xoff = 0;
Cpu_table.serial_cts_rts = 1;
Cpu_table.serial_rate = 9600;
Cpu_table.timer_average_overhead = 0;
Cpu_table.timer_least_valid = 0;
Cpu_table.clock_speed = 40000000;
/*
* Since we are currently autodetecting whether to use SCC1 or
* the FEC for ethernet, we set up a register in the ethernet
* transciever that is used for 10/100 Mbps ethernet now, so that
* we can attempt to read it later in rtems_enet_driver_attach()
*/
m8xx.fec.mii_speed = 0x0a;
m8xx.fec.mii_data = 0x680a0000;
m8xx.scc2.sccm=0;
m8xx.scc2p.rbase=0;
m8xx.scc2p.tbase=0;
m8xx_cp_execute_cmd( M8xx_CR_OP_STOP_TX | M8xx_CR_CHAN_SCC2 );
/*
* Initalize RTEMS IRQ system
*/
BSP_rtems_irq_mng_init(0);
#ifdef SHOW_MORE_INIT_SETTINGS
printk("Exit from bspstart\n");
#endif
}
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