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File: [local] / sys / ddb / db_access.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:09:33 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: db_access.c,v 1.10 2007/03/15 17:10:22 miod Exp $ */ /* $NetBSD: db_access.c,v 1.8 1994/10/09 08:37:35 mycroft Exp $ */ /* * Mach Operating System * Copyright (c) 1991,1990 Carnegie Mellon University * All Rights Reserved. * * 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 * 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 * the rights to redistribute these changes. * * Author: David B. Golub, Carnegie Mellon University * Date: 7/90 */ #include <sys/param.h> #include <sys/proc.h> #include <uvm/uvm_extern.h> #include <machine/db_machdep.h> /* type definitions */ #include <machine/endian.h> #include <ddb/db_access.h> /* * Access unaligned data items on aligned (longword) * boundaries. */ db_expr_t db_get_value(db_addr_t addr, size_t size, boolean_t is_signed) { char data[sizeof(db_expr_t)]; db_expr_t value, extend; int i; #ifdef DIAGNOSTIC if (size > sizeof data) size = sizeof data; #endif db_read_bytes(addr, size, data); value = 0; extend = (~(db_expr_t)0) << (size * 8 - 1); #if BYTE_ORDER == LITTLE_ENDIAN for (i = size - 1; i >= 0; i--) #else /* BYTE_ORDER == BIG_ENDIAN */ for (i = 0; i < size; i++) #endif /* BYTE_ORDER */ value = (value << 8) + (data[i] & 0xFF); if (size < sizeof(db_expr_t) && is_signed && (value & extend)) value |= extend; return (value); } void db_put_value(db_addr_t addr, size_t size, db_expr_t value) { char data[sizeof(db_expr_t)]; int i; #ifdef DIAGNOSTIC if (size > sizeof data) size = sizeof data; #endif #if BYTE_ORDER == LITTLE_ENDIAN for (i = 0; i < size; i++) #else /* BYTE_ORDER == BIG_ENDIAN */ for (i = size - 1; i >= 0; i--) #endif /* BYTE_ORDER */ { data[i] = value & 0xff; value >>= 8; } db_write_bytes(addr, size, data); }