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