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/*
* AMBA Plag & Play Bus Driver
*
* This driver hook performs bus scanning.
*
* 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.
*
* $Id$
*/
#include <bsp.h>
/* Structure containing address to devices found on the Amba Plug&Play bus */
amba_confarea_type amba_conf;
/* GRLIB extended IRQ controller register */
extern void leon3_ext_irq_init(void);
/* Pointers to Interrupt Controller configuration registers */
volatile LEON3_IrqCtrl_Regs_Map *LEON3_IrqCtrl_Regs;
/*
* amba_initialize
*
* Must be called just before drivers are initialized.
* Used to scan system bus. Probes for AHB masters, AHB slaves and
* APB slaves. Addresses to configuration areas of the AHB masters,
* AHB slaves, APB slaves and APB master are storeds in
* amba_ahb_masters, amba_ahb_slaves and amba.
*/
extern int scan_uarts(void);
void amba_initialize(void)
{
int i;
amba_apb_device dev;
/* Scan the AMBA Plug&Play info at the default LEON3 area */
amba_scan(&amba_conf,LEON3_IO_AREA,NULL);
/* Find LEON3 Interrupt controler */
i = amba_find_apbslv(&amba_conf,VENDOR_GAISLER,GAISLER_IRQMP,&dev);
if ( i > 0 ){
/* Found APB IRQ_MP Interrupt Controller */
LEON3_IrqCtrl_Regs = (volatile LEON3_IrqCtrl_Regs_Map *) dev.start;
}
/* Init Extended IRQ controller if available */
leon3_ext_irq_init();
/* find GP Timer */
i = amba_find_apbslv(&amba_conf,VENDOR_GAISLER,GAISLER_GPTIMER,&dev);
if ( i > 0 ){
LEON3_Timer_Regs = (volatile LEON3_Timer_Regs_Map *) dev.start;
}
/* find UARTS */
scan_uarts();
}
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