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/*
* 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) 1989-2013.
* On-Line Applications Research Corporation (OAR).
*
* Modified for LEON3 BSP.
* COPYRIGHT (c) 2004.
* Gaisler Research.
*
* 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.
*/
#include <bsp.h>
#include <leon.h>
#include <rtems/bspIo.h>
#include <bsp/bootcard.h>
/*
* Tells us if data cache snooping is available
*/
int CPU_SPARC_HAS_SNOOPING;
/* Index of CPU, in an AMP system CPU-index may be non-zero */
int LEON3_Cpu_Index = 0;
extern void amba_initialize(void);
/*
* set_snooping
*
* Read the data cache configuration register to determine if
* bus snooping is available and enabled. This is needed for some
* drivers so that they can select the most efficient copy routines.
*
*/
static inline int set_snooping(void)
{
int tmp;
__asm__ (" lda [%%g0] 2, %0 "
: "=r"(tmp)
:
);
return (tmp >> 23) & 1;
}
/* ASM-function used to get the CPU-Index on calling LEON3 CPUs */
static inline unsigned int get_asr17(void)
{
unsigned int reg;
__asm__ (" mov %%asr17, %0 " : "=r"(reg) :);
return reg;
}
/*
* bsp_start
*
* This routine does the bulk of the system initialization.
*/
void bsp_start( void )
{
CPU_SPARC_HAS_SNOOPING = set_snooping();
/* Get the LEON3 CPU index, normally 0, but for MP systems we do
* _not_ assume that this is CPU0. One may run another OS on CPU0
* and RTEMS on this CPU, and AMP system with mixed operating
* systems
*/
LEON3_Cpu_Index = (get_asr17() >> 28) & 3;
/* Scan AMBA Plug&Play and parse it into a RAM description (ambapp_plb),
* find GPTIMER for bus frequency, find IRQ Controller and initialize
* interrupt support
*/
amba_initialize();
/* find debug UART for printk() */
bsp_debug_uart_init();
}
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