Return to i80321_mcu.c CVS log

Up to [local] / sys / arch / arm / xscale

Annotation of sys/arch/arm/xscale/i80321_mcu.c, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: i80321_mcu.c,v 1.2 2006/05/29 17:27:31 drahn Exp $    */
                      2: /*     $NetBSD: i80321_mcu.c,v 1.3 2005/12/11 12:16:51 christos Exp $  */
                      3:
                      4: /*
                      5:  * Copyright (c) 2001, 2002 Wasabi Systems, Inc.
                      6:  * All rights reserved.
                      7:  *
                      8:  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
                      9:  *
                     10:  * Redistribution and use in source and binary forms, with or without
                     11:  * modification, are permitted provided that the following conditions
                     12:  * are met:
                     13:  * 1. Redistributions of source code must retain the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer.
                     15:  * 2. Redistributions in binary form must reproduce the above copyright
                     16:  *    notice, this list of conditions and the following disclaimer in the
                     17:  *    documentation and/or other materials provided with the distribution.
                     18:  * 3. All advertising materials mentioning features or use of this software
                     19:  *    must display the following acknowledgement:
                     20:  *     This product includes software developed for the NetBSD Project by
                     21:  *     Wasabi Systems, Inc.
                     22:  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
                     23:  *    or promote products derived from this software without specific prior
                     24:  *    written permission.
                     25:  *
                     26:  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
                     27:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
                     28:  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
                     29:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
                     30:  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
                     31:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
                     32:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
                     33:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
                     34:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
                     35:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
                     36:  * POSSIBILITY OF SUCH DAMAGE.
                     37:  */
                     38:
                     39: /*
                     40:  * Intel i80321 I/O Processor memory controller support.
                     41:  */
                     42:
                     43: #include <sys/param.h>
                     44: #include <sys/systm.h>
                     45:
                     46: #include <machine/bus.h>
                     47:
                     48: #include <arm/xscale/i80321reg.h>
                     49: #include <arm/xscale/i80321var.h>
                     50:
                     51: /*
                     52:  * i80321_sdram_bounds:
                     53:  *
                     54:  *     Retrieve the start and size of SDRAM.
                     55:  */
                     56: void
                     57: i80321_sdram_bounds(bus_space_tag_t st, bus_space_handle_t sh,
                     58:     paddr_t *start, psize_t *size)
                     59: {
                     60:        uint32_t sdbr, sbr0, sbr1;
                     61:        uint32_t bank0, bank1;
                     62:
                     63:        sdbr = bus_space_read_4(st, sh, MCU_SDBR);
                     64:        sbr0 = bus_space_read_4(st, sh, MCU_SBR0);
                     65:        sbr1 = bus_space_read_4(st, sh, MCU_SBR1);
                     66:
                     67: #ifdef VERBOSE_INIT_ARM
                     68:        printf("i80321: SBDR = 0x%08x SBR0 = 0x%08x SBR1 = 0x%08x\n",
                     69:            sdbr, sbr0, sbr1);
                     70: #endif
                     71:
                     72:        *start = sdbr;
                     73:
                     74:        sdbr = (sdbr >> 25) & 0x1f;
                     75:
                     76:        sbr0 &= 0x3f;
                     77:        sbr1 &= 0x3f;
                     78:
                     79:        bank0 = (sbr0 - sdbr) << 25;
                     80:        bank1 = (sbr1 - sbr0) << 25;
                     81:
                     82: #ifdef VERBOSE_INIT_ARM
                     83:        printf("i80321: BANK0 = 0x%08x BANK1 = 0x%08x\n", bank0, bank1);
                     84: #endif
                     85:
                     86:        *size = bank0 + bank1;
                     87: }