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