void bsp_start(void)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
ppc_cpu_id_t myCpu;
ppc_cpu_revision_t myCpuRevision;
/* 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 exception handler */
/* FIXME: Interrupt stack begin and size */
sc = ppc_exc_initialize(
PPC_INTERRUPT_DISABLE_MASK_DEFAULT,
(uintptr_t) IntrStack_start,
(uintptr_t) intrStack - (uintptr_t) IntrStack_start
);
if (sc != RTEMS_SUCCESSFUL) {
BSP_panic("cannot intitialize exceptions");
}
/* Initalize interrupt support */
sc = bsp_interrupt_initialize();
if (sc != RTEMS_SUCCESSFUL) {
BSP_panic("cannot intitialize interrupts");
}
/*
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
/*
* initialize the device driver parameters
*/
bsp_clicks_per_usec = 10; /* for 40MHz extclk */
bsp_serial_per_sec = 40000000;
bsp_serial_external_clock = 0;
bsp_serial_xon_xoff = 0;
bsp_serial_cts_rts = 0;
bsp_serial_rate = 9600;
bsp_timer_average_overhead = 3;
bsp_timer_least_valid = 3;
bsp_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;
*/
#ifdef SHOW_MORE_INIT_SETTINGS
printk("Exit from bspstart\n");
#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) - PPC_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
}
