153 lines
4.7 KiB
C
153 lines
4.7 KiB
C
/*
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* Copyright (c) 2011 Aeroflex Gaisler
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*
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* BSD license:
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <asm-leon/leon.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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/*#define DEBUG_CONFIG*/
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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 = 0;
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volatile LEON3_GpTimer_Regs_Map *LEON3_GpTimer_Regs = 0;
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unsigned long LEON3_GpTimer_Irq = 0;
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unsigned long
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amba_find_apbslv_addr (unsigned long vendor, unsigned long device,
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unsigned long *irq)
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{
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unsigned int i, conf, iobar;
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for (i = 0; i < amba_conf.apbslv.devnr; i++)
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{
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conf = amba_get_confword (amba_conf.apbslv, i, 0);
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if ((amba_vendor (conf) == vendor) && (amba_device (conf) == device))
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{
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if (irq)
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{
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*irq = amba_irq (conf);
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}
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iobar = amba_apb_get_membar (amba_conf.apbslv, i);
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return amba_iobar_start (amba_conf.apbslv.apbmst[i], iobar);
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}
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}
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return 0;
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}
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#define amba_insert_device(tab, address) do { \
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if (LEON3_BYPASS_LOAD_PA(address)) { \
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(tab)->addr[(tab)->devnr] = (address); \
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(tab)->devnr ++; \
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} \
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} while(0)
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#define amba_insert_apb_device(tab, address, apbmst, idx) do { \
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if (*(address)) { \
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(tab)->addr[(tab)->devnr] = (address); \
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(tab)->apbmst[(tab)->devnr] = (apbmst); \
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(tab)->apbmstidx[(tab)->devnr] = (idx); \
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(tab)->devnr ++; \
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} \
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} while(0)
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/*
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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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int amba_init_done = 0;
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void
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amba_init (void)
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{
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unsigned int *cfg_area; /* address to configuration area */
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unsigned int mbar, conf, apbmst;
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int i, j, idx = 0;
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if (amba_init_done)
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{
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return;
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}
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amba_init_done = 1;
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memset (&amba_conf, 0, sizeof (amba_conf));
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/*amba_conf.ahbmst.devnr = 0; amba_conf.ahbslv.devnr = 0; amba_conf.apbslv.devnr = 0; */
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cfg_area = (unsigned int *) (LEON3_IO_AREA | LEON3_CONF_AREA);
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for (i = 0; i < LEON3_AHB_MASTERS; i++)
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{
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amba_insert_device (&amba_conf.ahbmst, cfg_area);
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cfg_area += LEON3_AHB_CONF_WORDS;
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}
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cfg_area =
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(unsigned int *) (LEON3_IO_AREA | LEON3_CONF_AREA |
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LEON3_AHB_SLAVE_CONF_AREA);
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for (i = 0; i < LEON3_AHB_SLAVES; i++)
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{
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amba_insert_device (&amba_conf.ahbslv, cfg_area);
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cfg_area += LEON3_AHB_CONF_WORDS;
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}
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for (i = 0; i < amba_conf.ahbslv.devnr; i++)
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{
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conf = amba_get_confword (amba_conf.ahbslv, i, 0);
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mbar = amba_ahb_get_membar (amba_conf.ahbslv, i, 0);
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if ((amba_vendor (conf) == VENDOR_GAISLER)
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&& (amba_device (conf) == GAISLER_APBMST))
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{
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int k;
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/*amba_conf.apbmst = */ apbmst = amba_membar_start (mbar);
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cfg_area = (unsigned int *) (apbmst | LEON3_CONF_AREA);
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for (j = amba_conf.apbslv.devnr, k = 0;
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j < AMBA_MAXAPB_DEVS && k < AMBA_MAXAPB_DEVS_PERBUS; j++, k++)
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{
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amba_insert_apb_device (&amba_conf.apbslv, cfg_area, apbmst,
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idx);
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cfg_area += LEON3_APB_CONF_WORDS;
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}
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idx++;
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}
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}
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/* Find LEON3 Interrupt controler */
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LEON3_IrqCtrl_Regs = (volatile LEON3_IrqCtrl_Regs_Map *)
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amba_find_apbslv_addr (VENDOR_GAISLER, GAISLER_IRQMP, 0);
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LEON3_GpTimer_Regs = (volatile LEON3_GpTimer_Regs_Map *)
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amba_find_apbslv_addr (VENDOR_GAISLER, GAISLER_GPTIMER,
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&LEON3_GpTimer_Irq);
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if (LEON3_IrqCtrl_Regs)
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{
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LEON3_BYPASS_STORE_PA (&(LEON3_IrqCtrl_Regs->mask[0]), 0);
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}
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}
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