2b488a7d9f
incorporate write back support for processors not having a write through cache. The current fb_devconfig structure now really holds the device's configuration and the softc really only holds the attachment information. This used to be mixed giving rise to weird stuctures and cross references. The number of vertical syncs before the video memory writeback is triggered is configurable ... default is to wait for 5 Vsync .. aprox minumum 10 times a second, but more likely in the order of 12,5 times a second. When printing is in progress no write back is performed... only after the waiting time. The reasoning behind this is that as long as the screen is printed too the cache will be purged of dirty data anyway due to the processing and new screen memory useage.
$NetBSD: README,v 1.21 2002/03/07 14:48:23 simonb Exp $ acorn32: Acorn computers Ltd. ARM 6/7/SA based machines (arm) algor: Algorithmics, Ltd. MIPS evaluation boards (mips) alpha: Compaq (formerly Digital Equipment Corp.) Alpha (alpha) amiga: Commodore et al. Amiga (m68k) amigappc: Phase 5 Amiga (powerpc) arc: MIPS Advanced Risc Computing spec machines (mips) arm26: Acorn ARM2- and ARM3-based machines (arm) atari: Atari TT30, Falcon, and Hades (m68k) bebox: Be Inc. BeBox (powerpc) cats: Chalice Technologies, CATS motherboard (arm) cesfic: FIC8234 VME processor board (m68k) cobalt: Cobalt Networks Microservers (mips) dreamcast: SEGA Dreamcast (sh3) evbarm: ARM-based eval boards (arm) evbmips: MIPS-based eval boards (mips) evbsh3: Hitachi SuperH(TM) sh3 and sh4 eval boards (sh3) hp300: Hewlett Packard 300- and 400-series machines (m68k) hpcarm: ARM based handheld PCs (arm) hpcmips: MIPS based handheld PCs (mips) hpcsh: Hitachi SuperH(TM) based handheld PCs (sh3) i386: Intel/AMD etc. x86 processor line (i386) ibmnws: IBM Network Station Thin Clients (powerpc) luna68k: LUNA product line of OMRON Tateishi Electric (m68k) mac68k: Apple Macintosh (m68k) macppc: Apple Power Macintosh and clones (powerpc) mipsco: MIPS Corp Magnum 3000 computers (mips) mmeye: Hitachi SuperH(TM) computer controlled camera (sh3) mvme68k: Motorola's VMEbus 68K based single board computers (m68k) mvmeppc: Motorola's VMEbus PowerPC based single board computers (powerpc) mvme88k: Motorola's VMEbus 88K based single board computers (m88k) netwinder: StrongARM based Netwinder machines (arm) news68k: Sony's NET WORK STATION (m68k) newsmips: Sony's NET WORK STATION (mips) next68k: NeXT Computer's cubes and slabs (m68k) ofppc: Open Firmware based PowerPC machines (powerpc) pc532: "PC-532" kit computer, based on NS 32532 CPU (ns32k) playstation2: SONY PlayStation 2 (mips) pmax: Digital Equipment Corp. MIPS based machines (mips) prep: PowerPC Reference Platform machines (powerpc) sandpoint: Motorola Sandpoint reference platform (powerpc) sbmips: Broadcom's SiByte processor evaluation boards (mips) sgimips: MIPS based Silicon Graphics machines (mips) shark: Digital Network Appliance Reference Design (pronounced "Shark") machines (arm) sparc: Sun Microsystems SPARC (sun4, sun4c, sun4m) 32 bit machines (sparc) sparc64: Sun Microsystems UltraSPARC 64 bit machines (sparc64, sparc) sun2: Sun m68010 based machines (m68k) sun3: Sun m680[23]0 based machines (m68k) vax: Digital Equipment Corp. VAX machines (vax) walnut: IBM's PowerPC 405GP Reference Board (powerpc) x68k: Sharp X68000, X68030 (m68k) x86_64: AMD's x86 64 bit architecture on the simics simulator (x86_64) Generic architectural features shared among multiple ports arm: ARM cpu based platform files hpc: Handheld PC reference platform files m68k: Motorola 680x0 cpu based platform files m88k: Motorola 88xxx cpu based platform files mips: MIPS cpu based platform files powerpc: PowerPC cpu based platform files sh3: Hitachi SuperH cpu based platform files sun68k: Sun68k cpu based platform files