blob: b3b2c22607dc16ab94372c3b2949efcaebdddaf6 (
plain) (
tree)
|
|
/* bspstart.c
*
* 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) 1989-1997.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may in
* the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id:
*/
#include <string.h>
#include <bsp.h>
#include <rtems/libio.h>
#include <rtems/libcsupport.h>
/*
* The original table from the application and our copy of it with
* some changes.
*/
extern rtems_configuration_table Configuration;
rtems_configuration_table BSP_Configuration;
rtems_cpu_table Cpu_table;
uint32_t bsp_isr_level;
/*
* Use the shared implementations of the following routines
*/
void bsp_postdriver_hook(void);
void bsp_libc_init( void *, uint32_t, int );
/*PAGE
*
* bsp_pretasking_hook
*
* BSP pretasking hook. Called just before drivers are initialized.
* Used to setup libc and install any BSP extensions.
*/
void bsp_pretasking_hook(void)
{
extern int end;
uint32_t heap_start;
uint32_t heap_size;
heap_start = (uint32_t) &end;
if (heap_start & (CPU_ALIGNMENT-1))
heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
heap_size = BSP_Configuration.work_space_start - (void *)&end;
heap_size &= 0xfffffff0; /* keep it as a multiple of 16 bytes */
bsp_libc_init((void *) heap_start, heap_size, 0);
#ifdef RTEMS_DEBUG
rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
#endif
}
/*PAGE
*
* bsp_predriver_hook
*
* Before drivers are setup initialize interupt vectors.
*/
void init_RTC();
void initialize_PMC();
void bsp_predriver_hook(void)
{
init_RTC();
init_PCI();
initialize_universe();
initialize_PCI_bridge ();
#if (HAS_PMC_PSC8)
initialize_PMC();
#endif
/*
* Initialize Bsp General purpose vector table.
*/
initialize_external_exception_vector();
#if (0)
/*
* XXX - Modify this to write a 48000000 (loop to self) command
* to each interrupt location. This is better for debug.
*/
bsp_spurious_initialize();
#endif
}
/*PAGE
*
* initialize_PMC
*/
void initialize_PMC() {
volatile uint32_t *PMC_addr;
uint8_t data;
#if (0) /* First Values sent */
/*
* set PMC base address.
*/
PMC_addr = SCORE603E_PCI_DEVICE_ADDRESS( 0x14 );
*PMC_addr = (SCORE603E_PCI_REGISTER_BASE >> 24) & 0x3f;
/*
* Clear status, enable SERR and memory space only.
*/
PMC_addr = SCORE603E_PCI_DEVICE_ADDRESS( 0x4 );
*PMC_addr = 0x0201ff37;
/*
* Bit 0 and 1 HI cause Medium Loopback to occur.
*/
PMC_addr = (volatile uint32_t*)
SCORE603E_PMC_SERIAL_ADDRESS( 0x100000 );
data = *PMC_addr;
/* *PMC_addr = data | 0x3; */
*PMC_addr = data & 0xfc;
#endif
#if (1)
/*
* Clear status, enable SERR and memory space only.
*/
PMC_addr = SCORE603E_PCI_DEVICE_ADDRESS( 0x4 );
*PMC_addr = 0x020080cc;
/*
* set PMC base address.
*/
PMC_addr = SCORE603E_PCI_DEVICE_ADDRESS( 0x14 );
*PMC_addr = (SCORE603E_PCI_REGISTER_BASE >> 24) & 0x3f;
PMC_addr = (volatile uint32_t*)
SCORE603E_PMC_SERIAL_ADDRESS( 0x100000 );
data = *PMC_addr;
*PMC_addr = data & 0xfc;
#endif
}
/*PAGE
*
* SCORE603e_bsp_postdriver_hook
*
* Standard post driver hook plus some BSP specific stuff.
*/
void SCORE603e_bsp_postdriver_hook(void)
{
extern void Init_EE_mask_init(void);
bsp_postdriver_hook();
Init_EE_mask_init();
}
void bsp_set_trap_vectors( void );
/*PAGE
*
* bsp_start
*
* This routine does the bulk of the system initialization.
*/
void bsp_start( void )
{
unsigned char *work_space_start;
unsigned int msr_value = 0x0000;
volatile uint32_t *ptr;
rtems_bsp_delay( 1000 );
/*
* Zero out lots of memory
*/
memset(
&end,
0,
(unsigned char *)&RAM_END - (unsigned char *) &end
);
/*
* There are multiple ROM monitors available for this board.
*/
#if (SCORE603E_USE_SDS)
/*
* Write instruction for Unconditional Branch to ROM vector.
*/
Code = 0x4bf00002;
for (Address = 0x100; Address <= 0xe00; Address += 0x100) {
A_Vector = (uint32_t*)Address;
Code = 0x4bf00002 + Address;
*A_Vector = Code;
}
for (Address = 0x1000; Address <= 0x1400; Address += 0x100) {
A_Vector = (uint32_t*)Address;
Code = 0x4bf00002 + Address;
*A_Vector = Code;
}
Cpu_table.exceptions_in_RAM = TRUE;
msr_value = 0x2030;
#elif (SCORE603E_USE_OPEN_FIRMWARE)
Cpu_table.exceptions_in_RAM = TRUE;
msr_value = 0x2030;
#elif (SCORE603E_USE_NONE)
Cpu_table.exceptions_in_RAM = TRUE;
msr_value = 0x2030;
_CPU_MSR_SET( msr_value );
bsp_set_trap_vectors();
#elif (SCORE603E_USE_DINK)
Cpu_table.exceptions_in_RAM = TRUE;
msr_value = 0x2030;
_CPU_MSR_SET( msr_value );
/*
* Override the DINK error on a Decrementor interrupt.
*/
/* org dec_vector - rfi */
ptr = (uint32_t*)0x900;
*ptr = 0x4c000064;
#else
#error "SCORE603E BSPSTART.C -- what ROM monitor are you using"
#endif
_CPU_MSR_SET( msr_value );
/*
* 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".
*/
work_space_start =
(unsigned char *)&RAM_END - BSP_Configuration.work_space_size;
if ( work_space_start <= (unsigned char *)&end ) {
DEBUG_puts( "bspstart: Not enough RAM!!!\n" );
bsp_cleanup();
}
BSP_Configuration.work_space_start = work_space_start;
/*
* initialize the CPU table for this BSP
*/
/* Cpu_table.exceptions_in_RAM was set above */
Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */
Cpu_table.predriver_hook = bsp_predriver_hook; /* Init vectors */
Cpu_table.postdriver_hook = SCORE603e_bsp_postdriver_hook;
Cpu_table.clicks_per_usec = 66 / 4; /* XXX get from linkcmds */
Cpu_table.do_zero_of_workspace = TRUE;
Cpu_table.interrupt_stack_size = CONFIGURE_INTERRUPT_STACK_MEMORY;
Cpu_table.idle_task_stack_size = (3 * STACK_MINIMUM_SIZE);
#if ( PPC_USE_DATA_CACHE )
instruction_cache_enable ();
data_cache_enable ();
#endif
}
|
