forked from Imagelibrary/rtems
7f3c6cee09
* amba/amba.c, clock/ckinit.c, console/console.c, include/bsp.h, startup/bspstart.c, timer/timer.c: Move interrupt_stack_size field from CPU Table to Configuration Table. Eliminate CPU Table from all ports. Delete references to CPU Table in all forms.
76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
/*
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* AMBA Plag & Play Bus Driver
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*
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* This driver hook performs bus scanning.
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*
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* COPYRIGHT (c) 2004.
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* Gaisler Research
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.com/license/LICENSE.
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*
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* $Id$
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*/
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#include <bsp.h>
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/* Structure containing address to devices found on the Amba Plug&Play bus */
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amba_confarea_type amba_conf;
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/* Pointers to Interrupt Controller configuration registers */
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volatile LEON3_IrqCtrl_Regs_Map *LEON3_IrqCtrl_Regs;
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int LEON3_Cpu_Index = 0;
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/*
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* bsp_predriver_hook
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*
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* BSP predriver hook. Called just before drivers are initialized.
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* Used to scan system bus. Probes for AHB masters, AHB slaves and
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* APB slaves. Addresses to configuration areas of the AHB masters,
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* AHB slaves, APB slaves and APB master are storeds in
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* amba_ahb_masters, amba_ahb_slaves and amba.
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*/
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unsigned int getasr17();
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asm(" .text \n"
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"getasr17: \n"
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"retl \n"
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"mov %asr17, %o0\n"
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);
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extern rtems_configuration_table Configuration;
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void bsp_predriver_hook(void)
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{
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int i;
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unsigned int tmp;
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amba_apb_device dev;
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/* Scan the AMBA Plug&Play info at the default LEON3 area */
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amba_scan(&amba_conf,LEON3_IO_AREA,NULL);
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/* Find LEON3 Interrupt controler */
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i = amba_find_apbslv(&amba_conf,VENDOR_GAISLER,GAISLER_IRQMP,&dev);
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if ( i > 0 ){
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/* Found APB IRQ_MP Interrupt Controller */
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LEON3_IrqCtrl_Regs = (volatile LEON3_IrqCtrl_Regs_Map *) dev.start;
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#if defined(RTEMS_MULTIPROCESSING)
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if (rtems_configuration_get_user_multiprocessing_table() != NULL) {
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tmp = getasr17();
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LEON3_Cpu_Index = (tmp >> 28) & 3;
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}
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#endif
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}
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/* find GP Timer */
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i = amba_find_apbslv(&amba_conf,VENDOR_GAISLER,GAISLER_GPTIMER,&dev);
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if ( i > 0 ){
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LEON3_Timer_Regs = (volatile LEON3_Timer_Regs_Map *) dev.start;
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}
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}
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