91 lines
2.8 KiB
C
91 lines
2.8 KiB
C
/* $NetBSD: i80321_mcu.c,v 1.2 2003/07/15 00:24:54 lukem Exp $ */
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/*-
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* Copyright (c) 2001, 2002 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Intel i80321 I/O Processor memory controller support.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <arm/xscale/i80321/i80321reg.h>
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#include <arm/xscale/i80321/i80321var.h>
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/*
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* i80321_sdram_bounds:
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*
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* Retrieve the start and size of SDRAM.
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*/
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void
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i80321_sdram_bounds(bus_space_tag_t st, bus_space_handle_t sh,
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vm_paddr_t *start, vm_size_t *size)
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{
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uint32_t sdbr, sbr0, sbr1;
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uint32_t bank0, bank1;
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sdbr = bus_space_read_4(st, sh, MCU_SDBR);
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sbr0 = bus_space_read_4(st, sh, MCU_SBR0);
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sbr1 = bus_space_read_4(st, sh, MCU_SBR1);
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#ifdef VERBOSE_INIT_ARM
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printf("i80321: SBDR = 0x%08x SBR0 = 0x%08x SBR1 = 0x%08x\n",
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sdbr, sbr0, sbr1);
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#endif
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*start = sdbr;
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sdbr = (sdbr >> 25) & 0x1f;
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sbr0 &= 0x3f;
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sbr1 &= 0x3f;
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bank0 = (sbr0 - sdbr) << 25;
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bank1 = (sbr1 - sbr0) << 25;
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#ifdef VERBOSE_INIT_ARM
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printf("i80321: BANK0 = 0x%08x BANK1 = 0x%08x\n", bank0, bank1);
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#endif
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*size = bank0 + bank1;
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}
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