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/* $OpenBSD: i80321_mcu.c,v 1.2 2006/05/29 17:27:31 drahn Exp $ */
/* $NetBSD: i80321_mcu.c,v 1.3 2005/12/11 12:16:51 christos Exp $ */
/*
* Copyright (c) 2001, 2002 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Intel i80321 I/O Processor memory controller support.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <machine/bus.h>
#include <arm/xscale/i80321reg.h>
#include <arm/xscale/i80321var.h>
/*
* i80321_sdram_bounds:
*
* Retrieve the start and size of SDRAM.
*/
void
i80321_sdram_bounds(bus_space_tag_t st, bus_space_handle_t sh,
paddr_t *start, psize_t *size)
{
uint32_t sdbr, sbr0, sbr1;
uint32_t bank0, bank1;
sdbr = bus_space_read_4(st, sh, MCU_SDBR);
sbr0 = bus_space_read_4(st, sh, MCU_SBR0);
sbr1 = bus_space_read_4(st, sh, MCU_SBR1);
#ifdef VERBOSE_INIT_ARM
printf("i80321: SBDR = 0x%08x SBR0 = 0x%08x SBR1 = 0x%08x\n",
sdbr, sbr0, sbr1);
#endif
*start = sdbr;
sdbr = (sdbr >> 25) & 0x1f;
sbr0 &= 0x3f;
sbr1 &= 0x3f;
bank0 = (sbr0 - sdbr) << 25;
bank1 = (sbr1 - sbr0) << 25;
#ifdef VERBOSE_INIT_ARM
printf("i80321: BANK0 = 0x%08x BANK1 = 0x%08x\n", bank0, bank1);
#endif
*size = bank0 + bank1;
}
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