/* 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)
*
* Modified for the MPC8260ADS board by Andy Dachs <a.dachs@sstl.co.uk>
* Surrey Satellite Technology Limited, 2001
* A 40MHz system clock is assumed.
* The PON. RST.CONF. Dip switches (DS1) are
* 1 - Off
* 2 - On
* 3 - Off
* 4 - On
* 5 - Off
* 6 - Off
* 7 - Off
* 8 - Off
* Dip switches on DS2 and DS3 are all set to ON
* The LEDs on the board are used to signal panic and fatal_error
* conditions.
* The mmu is unused at this time.
*
*
* 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.rtems.com/license/LICENSE.
*
* $Id$
*/
#include <bsp.h>
/*
#include <mmu.h>
*/
#include <mpc8260.h>
#include <rtems/libio.h>
#include <rtems/libcsupport.h>
#include <rtems/score/thread.h>
#include <rtems/bspIo.h>
#include <libcpu/cpuIdent.h>
#include <libcpu/spr.h>
#include <string.h>
#ifdef STACK_CHECKER_ON
#include <stackchk.h>
#endif
SPR_RW(SPRG0)
SPR_RW(SPRG1)
/*
* The original table from the application (in ROM) and our copy of it with
* some changes. Configuration is defined in <confdefs.h>. Make sure that
* our configuration tables are uninitialized so that they get allocated in
* the .bss section (RAM).
*/
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.
* Look in rtems/c/src/lib/libbsp/shared/bsppost.c and
* rtems/c/src/lib/libbsp/shared/bsplibc.c.
*/
void bsp_postdriver_hook(void);
void bsp_libc_init( void *, uint32_t, int );
void _BSP_GPLED1_on(void);
void _BSP_GPLED0_on(void);
void cpu_init(void);
void initialize_exceptions(void);
void BSP_panic(char *s)
{
_BSP_GPLED1_on();
printk("%s PANIC %s\n",_RTEMS_version, s);
__asm__ __volatile ("sc");
}
void _BSP_Fatal_error(unsigned int v)
{
_BSP_GPLED0_on();
_BSP_GPLED1_on();
printk("%s PANIC ERROR %x\n",_RTEMS_version, v);
__asm__ __volatile ("sc");
}
void _BSP_GPLED0_on()
{
BCSR *csr;
csr = (BCSR *)(m8260.memc[1].br & 0xFFFF8000);
csr->bcsr0 &= ~GP0_LED; /* Turn on GP0 LED */
}
void _BSP_GPLED0_off()
{
BCSR *csr;
csr = (BCSR *)(m8260.memc[1].br & 0xFFFF8000);
csr->bcsr0 |= GP0_LED; /* Turn off GP0 LED */
}
void _BSP_GPLED1_on()
{
BCSR *csr;
csr = (BCSR *)(m8260.memc[1].br & 0xFFFF8000);
csr->bcsr0 &= ~GP1_LED; /* Turn on GP1 LED */
}
void _BSP_GPLED1_off()
{
BCSR *csr;
csr = (BCSR *)(m8260.memc[1].br & 0xFFFF8000);
csr->bcsr0 |= GP1_LED; /* Turn off GP1 LED */
}
void _BSP_Uart1_enable()
{
BCSR *csr;
csr = (BCSR *)(m8260.memc[1].br & 0xFFFF8000);
csr->bcsr1 &= ~UART1_E; /* Enable Uart1 */
}
void _BSP_Uart1_disable()
{
BCSR *csr;
csr = (BCSR *)(m8260.memc[1].br & 0xFFFF8000);
csr->bcsr1 |= UART1_E; /* Disable Uart1 */
}
void _BSP_Uart2_enable()
{
BCSR *csr;
csr = (BCSR *)(m8260.memc[1].br & 0xFFFF8000);
csr->bcsr1 &= ~UART2_E; /* Enable Uart2 */
}
void _BSP_Uart2_disable()
{
BCSR *csr;
csr = (BCSR *)(m8260.memc[1].br & 0xFFFF8000);
csr->bcsr1 |= UART2_E; /* Disable Uart2 */
}
extern void m8260_console_reserve_resources(rtems_configuration_table *);
/*
* 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)
{
/*
* These are assigned addresses in the linkcmds file for the BSP. This
* approach is better than having these defined as manifest constants and
* compiled into the kernel, but it is still not ideal when dealing with
* multiprocessor configuration in which each board as a different memory
* map. A better place for defining these symbols might be the makefiles.
* Consideration should also be given to developing an approach in which
* the kernel and the application can be linked and burned into ROM
* independently of each other.
*/
extern unsigned char _HeapStart;
extern unsigned char _HeapEnd;
bsp_libc_init( &_HeapStart, &_HeapEnd - &_HeapStart, 0 );
#ifdef STACK_CHECKER_ON
/*
* Initialize the stack bounds checker
* We can either turn it on here or from the app.
*/
Stack_check_Initialize();
#endif
#ifdef RTEMS_DEBUG
rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
#endif
}
void bsp_start(void)
{
extern void *_WorkspaceBase;
ppc_cpu_id_t myCpu;
ppc_cpu_revision_t myCpuRevision;
register unsigned char* intrStack;
/* Set MPC8260ADS board LEDS and Uart enable lines */
_BSP_GPLED0_off();
_BSP_GPLED1_off();
_BSP_Uart1_enable();
_BSP_Uart2_enable();
/*
* 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);
_write_SPRG1((unsigned int)intrStack);
/* signal that we have fixed PR288 - eventually, this should go away */
_write_SPRG0(PPC_BSP_HAS_FIXED_PR288);
/*
printk( "About to call initialize_exceptions\n" );
*/
/*
* Install our own set of exception vectors
*/
initialize_exceptions();
/*
mmu_init();
*/
/*
* Enable instruction and data caches. Do not force writethrough mode.
*/
#if INSTRUCTION_CACHE_ENABLE
rtems_cache_enable_instruction();
#endif
#if DATA_CACHE_ENABLE
rtems_cache_enable_data();
#endif
/*
* 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".
*/
BSP_Configuration.work_space_start = (void *)&_WorkspaceBase;
/*
BSP_Configuration.microseconds_per_tick = 1000;
*/
/*
* initialize the CPU table for this BSP
*/
Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */
Cpu_table.postdriver_hook = bsp_postdriver_hook;
if( Cpu_table.interrupt_stack_size < 4*1024 )
Cpu_table.interrupt_stack_size = 4 * 1024;
Cpu_table.clicks_per_usec = 10; /* for 40MHz extclk */
Cpu_table.serial_per_sec = 40000000;
Cpu_table.serial_external_clock = 0;
Cpu_table.serial_xon_xoff = 0;
Cpu_table.serial_cts_rts = 0;
Cpu_table.serial_rate = 9600;
Cpu_table.timer_average_overhead = 3;
Cpu_table.timer_least_valid = 3;
Cpu_table.clock_speed = 40000000;
#ifdef REV_0_2
/* set up some board specific registers */
m8260.siumcr &= 0xF3FFFFFF; /* set TBEN ** BUG FIX ** */
m8260.siumcr |= 0x08000000;
#endif
/* use BRG1 to generate 32kHz timebase */
/*
m8260.brgc1 = M8260_BRG_EN + (uint32_t)(((uint16_t)((40016384)/(32768)) - 1) << 1) + 0;
*/
/*
* Initalize RTEMS IRQ system
*/
BSP_rtems_irq_mng_init(0);
/*
* Call this in case we use TERMIOS for console I/O
*/
m8xx_uart_reserve_resources(&BSP_Configuration);
/*
rtems_termios_initialize();
*/
#ifdef SHOW_MORE_INIT_SETTINGS
printk("Exit from bspstart\n");
#endif
}
/*
*
* _Thread_Idle_body
*
* Replaces the one in c/src/exec/score/src/threadidlebody.c
* The MSR[POW] bit is set to put the CPU into the low power mode
* defined in HID0. HID0 is set during starup in start.S.
*
*/
Thread _Thread_Idle_body(
uint32_t ignored )
{
for( ; ; )
{
asm volatile(
"mfmsr 3; oris 3,3,4; sync; mtmsr 3; isync; ori 3,3,0; ori 3,3,0"
);
}
return 0; /* to remove warning */
}
