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File: [local] / sys / lib / libkern / arch / alpha / byte_swap_2.S (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:15:11 2008 UTC (16 years, 4 months ago) by nbrk
Import of OpenBSD 4.2 release kernel tree with initial code to support Jornada 720/728, StrongARM 1110-based handheld PC. At this point kernel roots on NFS and boots into vfs_mountroot() and traps. What is supported: - glass console, Jornada framebuffer (jfb) works in 16bpp direct color mode (needs some palette tweaks for non black/white/blue colors, i think) - saic, SA11x0 interrupt controller (needs cleanup) - sacom, SA11x0 UART (supported only as boot console for now) - SA11x0 GPIO controller fully supported (but can't handle multiple interrupt handlers on one gpio pin) - sassp, SSP port on SA11x0 that attaches spibus - Jornada microcontroller (jmcu) to control kbd, battery, etc throught the SPI bus (wskbd attaches on jmcu, but not tested) - tod functions seem work - initial code for SA-1111 (chip companion) : this is TODO Next important steps, i think: - gpio and intc on sa1111 - pcmcia support for sa11x0 (and sa1111 help logic) - REAL root on nfs when we have PCMCIA support (we may use any of supported pccard NICs) - root on wd0! (using already supported PCMCIA-ATA) |
/* $OpenBSD: byte_swap_2.S,v 1.2 1996/10/31 00:43:14 niklas Exp $ */ /* $NetBSD: byte_swap_2.S,v 1.2 1996/10/17 04:26:21 cgd Exp $ */ /* * Copyright (c) 1996 Carnegie-Mellon University. * All rights reserved. * * Author: Chris G. Demetriou * * Permission to use, copy, modify and distribute this software and * its documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie the * rights to redistribute these changes. */ #include <machine/asm.h> #ifndef NAME #define NAME byte_swap_2 #endif /* * Byte-swap a 2-byte quantity. (Convert 0x0123 to 0x2301.) * * Argument is an unsigned 2-byte integer (u_int16_t). */ LEAF(NAME, 1) /* a0 contains 0x0123 */ extbl a0, 0, t0 /* t0 = 0x 23 */ extbl a0, 1, t1 /* t1 = 0x 01 */ sll t0, 8, t0 /* t1 = 0x23 */ or t0, t1, v0 /* v0 = 0x2301 */ RET END(NAME)