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driver to initialize the SDRAM (should be done in the PROM, but easier in C...)

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Romain Dolbeau
2021-07-14 06:35:58 -04:00
parent bd011b9d9f
commit 1f733a1a4c
2 changed files with 1124 additions and 0 deletions
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NetBSD/9.0/usr/src/sys/dev/sbus/sbusfpga_sdram.c Normal file
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NetBSD/9.0/usr/src/sys/dev/sbus/sbusfpga_sdram.h Normal file
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/* $NetBSD$ */
/*-
* Copyright (c) 2020 Romain Dolbeau <romain@dolbeau.org>
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 THE FOUNDATION OR CONTRIBUTORS
* 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.
*/
#ifndef _SBUSFPGA_SDRAM_H_
#define _SBUSFPGA_SDRAM_H_
struct sbusfpga_sdram_softc {
device_t sc_dev; /* us as a device */
u_int sc_rev; /* revision */
int sc_node; /* PROM node ID */
int sc_burst; /* DVMA burst size in effect */
bus_space_tag_t sc_bustag; /* bus tag */
bus_space_handle_t sc_bhregs_ddrphy; /* bus handle */
bus_space_handle_t sc_bhregs_sdram; /* bus handle */
int sc_bufsiz_ddrphy; /* Size of buffer */
int sc_bufsiz_sdram; /* Size of buffer */
};
#endif /* _SBUSFPGA_SDRAM_H_ */