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Diffstat (limited to 'i386/i386at/blit.c')
| -rw-r--r-- | i386/i386at/blit.c | 948 |
1 files changed, 0 insertions, 948 deletions
diff --git a/i386/i386at/blit.c b/i386/i386at/blit.c deleted file mode 100644 index 32cc0a2..0000000 --- a/i386/i386at/blit.c +++ /dev/null @@ -1,948 +0,0 @@ -/* - * Mach Operating System - * Copyright (c) 1991,1990,1989 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 "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 Mellon - * the rights to redistribute these changes. - */ - -/* ********************************************************************** - File: blit.c - Description: Device Driver for Bell Tech Blit card - - $ Header: $ - - Copyright Ing. C. Olivetti & C. S.p.A. 1988, 1989. - All rights reserved. -********************************************************************** */ -/* - Copyright 1988, 1989 by Olivetti Advanced Technology Center, Inc., -Cupertino, California. - - All Rights Reserved - - Permission to use, copy, modify, and distribute this software and -its documentation for any purpose and without fee is hereby -granted, provided that the above copyright notice appears in all -copies and that both the copyright notice and this permission notice -appear in supporting documentation, and that the name of Olivetti -not be used in advertising or publicity pertaining to distribution -of the software without specific, written prior permission. - - OLIVETTI DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE -INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, -IN NO EVENT SHALL OLIVETTI BE LIABLE FOR ANY SPECIAL, INDIRECT, OR -CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM -LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT, -NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUR OF OR IN CONNECTION -WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. -*/ - -/* - Copyright 1988, 1989 by Intel Corporation, Santa Clara, California. - - All Rights Reserved - -Permission to use, copy, modify, and distribute this software and -its documentation for any purpose and without fee is hereby -granted, provided that the above copyright notice appears in all -copies and that both the copyright notice and this permission notice -appear in supporting documentation, and that the name of Intel -not be used in advertising or publicity pertaining to distribution -of the software without specific, written prior permission. - -INTEL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE -INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, -IN NO EVENT SHALL INTEL BE LIABLE FOR ANY SPECIAL, INDIRECT, OR -CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM -LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT, -NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION -WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. -*/ - -#ifdef MACH_KERNEL -#include <sys/types.h> -#include <device/errno.h> -#else /* MACH_KERNEL */ -#include <sys/types.h> -#include <sys/errno.h> -#include <sys/param.h> -#include <sys/dir.h> -#include <sys/signal.h> -#include <sys/user.h> -#endif /* MACH_KERNEL */ -#include <vm/vm_kern.h> -#include <mach/vm_param.h> -#include <machine/machspl.h> - -#include <i386at/blitreg.h> -#include <i386at/blitvar.h> -#include <i386at/blituser.h> -#include <i386at/kd.h> -#include <i386at/kdsoft.h> - -#include <blit.h> - - -/* - * This driver really only supports 1 card, though parts of it were - * written to support multiple cards. If you want to finish the job - * and really support multiple cards, then you'll have to: - * - * (1) make sure that driver functions pass around a pointer telling - * which card they're talking about. - * - * (2) coordinate things with the kd driver, so that one card is used - * for the console and the other is simply an additional display. - */ -#define MAXBLITS 1 - -#if NBLIT > MAXBLITS -/* oh, no, you don't want to do this...; */ - -#else -#if NBLIT > 0 - -#define AUTOINIT 0 - - /* - * Forward Declarations - */ -static tiledesc(); -static loadall(); - -#if AUTOINIT -int blitattach(), blitprobe(); -#endif - -int blitioctl(), blitopen(), blitclose(), blitmmap(); - - -static void setstatus(); -#define CARD_RESET 0 -#define CARD_MAPPED 1 -#define CARD_MAYBE_PRESENT 2 -#define CARD_PRESENT 3 -#define BIU_INIT 4 -#define UNUSED1 5 -#define DP_INIT 6 -#define UNUSED2 7 - - -#if AUTOINIT -struct mb_device *blitinfo[NBLIT]; - -struct mb_driver blitdriver = { - blitprobe, - 0, /* slave routine */ - blitattach, - 0, 0, 0, /* go, done, intr routines */ - BLIT_MAPPED_SIZE, - "blit", blitinfo, /* device info */ - 0, 0, /* no controller */ - 0 /* no flags */ - /* rest zeros */ -}; -#endif /* AUTOINIT */ - - -/* - * Per-card bookkeeping information for driver. - * - * "scrstrip" and "dpctlregs" point to data areas that are passed to - * the Display Processor. They are allocated out of the spare - * graphics memory. "scrstrip" is used to describe an entire screen. - * "dpctlregs" contains assorted parameters for the display - * controller. - * - * "firstfree" is an offset into the graphics memory. Memory starting - * there can be allocated by users. - */ - -struct blitsoft { - struct blitdev *blt; /* ptr to mapped card */ - caddr_t physaddr; /* start of mapped card */ - boolean_t open; /* is device open? */ - struct screen_descrip *scrstrip; - DPCONTROLBLK *dpctlregs; - int firstfree; -} blitsoft[NBLIT]; - - -/* - * The following array contains the initial settings for - * the Display Processor Control Block Registers. - * The video timing signals in this array are for the - * Bell Technologies Blit Express running in 1664 x 1200 x 1 mode. - * Please treat as read-only. - */ - -DPCONTROLBLK blit_mparm = { - DP_DSP_ON, /* video status */ - 0x00ff, /* interrupt mask - all disabled */ - 0x0010, /* trip point */ - 0x00ff, /* frame interrupt interval */ - 0x0000, /* reserved */ - CRTM_NONINTER | CRTM_SUPHIGH_SPEED, /* CRT controller mode */ - 41, /* horizontal synch stop */ - 57, /* horiz field start */ - 265, /* horiz field stop */ - 265, /* line length */ - 15, /* vert synch stop */ - 43, /* vert field start */ - 1243, /* vert field stop */ - 1244, /* frame length */ - 0x0000, 0x0000, /* descriptor pointer */ - 0x0000, /* reserved */ - 0x0101, /* x, y zoom factors */ - 0x0000, /* FldColor */ - 0x00ff, /* BdrColor */ - 0x0000, /* 1Bpp Pad */ - 0x0000, /* 2Bpp Pad */ - 0x0000, /* 4Bpp Pad */ - DP_CURSOR_CROSSHAIR, /* cursor style & mode */ - 0x00A0, 0x0050, /* cursor x & y loc. */ - /* cursor pattern */ - 0xfffe, 0xfffc, 0xc018, 0xc030, 0xc060, 0xc0c0, 0xc0c0, 0xc060, - 0xc430, 0xce18, 0xdb0c, 0xf186, 0xe0c3, 0xc066, 0x803c, 0x0018 -}; - -void blitreboot(); - -/*********** - * - * Initialization. - * - ***********/ - - -/* - * Probe - is the board there? - * - * in: reg = start of mapped Blit memory. - * - * out: returns size of mapped Blit memory if the board is present, - * 0 otherwise. - * - * effects: if the board is present, it is reset and left visible in - * Unix mode. - */ - -#if AUTOINIT -/*ARGSUSED*/ -int -blitprobe(reg, unit) - caddr_t reg; - int unit; -{ - struct blitdev *blt = (struct blitdev *)reg; - - if (blit_present()) - return(BLIT_MAPPED_SIZE); /* go */ - else - return(0); /* no-go */ -} -#endif /* AUTOINIT */ - - -/* - * Temporary initialization routine. This will go away when we have - * autoconfig. - */ - -blitinit() -{ - if (!blit_present()) - return; - - blit_init(); -} - - -/* - * Allocate needed objects from Blit's memory. - */ -blit_memory_init(bs) - struct blitsoft *bs; -{ - struct blitdev *blt = bs->blt; - struct blitmem *bm = (struct blitmem *)blt->graphmem; - u_char *p = bm->spare; - - if ((int)p % 2 == 1) - ++p; - - bs->scrstrip = (struct screen_descrip *)p; - p += sizeof(struct screen_descrip); - if ((int)p % 2 == 1) - ++p; - - bs->dpctlregs = (DPCONTROLBLK *)p; - p += sizeof(DPCONTROLBLK); - if ((int)p % 2 == 1) - ++p; - - /* - * Note: if you use the 786 graphics processor for character - * processing, you should copy the font from the ROM into - * graphics memory and change font_start to point to it. - * Otherwise, the 786 will have problems accessing the font. - */ - - bs->firstfree = p - blt->graphmem; -} - - -/* - * Reset the Blit board and leave it visible. - */ - -blit_reset_board() -{ - union blit_config_reg config; - - config.byte = inb(BLIT_CONFIG_ADDR); - config.reg.reset = 1; - outb(BLIT_CONFIG_ADDR, config.byte); - config.reg.reset = 0; - config.reg.mode = BLIT_UNIX_MODE; - config.reg.invisible = BLIT_VISIBLE; - outb(BLIT_CONFIG_ADDR, config.byte); - setstatus(CARD_RESET); -} - - -#if AUTOINIT -/* - * Attach - finish initialization by setting up the 786. - */ - -blitattach(md) - struct mb_device *md; -{ - struct blitdev *blt = (struct blitdev *)md->md_addr; - - blit_init(xyz); -} -#endif /* AUTOINIT */ - - -/* - * Initialize Bus Interface Unit. - */ - -init_biu(blt) - struct blitdev *blt; -{ - WRITEREG8(blt, INTER_RELOC, 0); - WRITEREG8(blt, BIU_CONTROL, BIU_16BIT); - - /* WRITEREG16(blt, DRAM_REFRESH, 0x003f); */ - WRITEREG16(blt, DRAM_REFRESH, 0x0018); /* refresh rate */ - WRITEREG16(blt, DRAM_CONTROL, - MEMROWS1 | FASTPG_INTERLV | HEIGHT_256K); - WRITEREG16(blt, DP_PRIORITY, (7 << 3) | 7); /* max pri */ - WRITEREG16(blt, GP_PRIORITY, (1 << 3) | 1); /* almost min pri */ - WRITEREG16(blt, EXT_PRIORITY, 5 << 3); - - /* now freeze the settings */ - WRITEREG16(blt, BIU_CONTROL, BIU_16BIT | BIU_WP1); - - /* Put graphics processor into Poll state. */ - WRITEREG16(blt, GP_OPCODE_REG, (OP_LINK|GECL)); -} - - -/* - * Initialize the Display Processor. - * XXX - assumes only 1 card is installed, assumes monochrome display. - */ - -init_dp(bs) - struct blitsoft *bs; -{ - struct blitdev *blt = bs->blt; - struct blitmem *bm = (struct blitmem *)blt->graphmem; - - /* - * Set up strip header and tile descriptor for the whole - * screen. It's not clear why the C bit should be turned on, - * but it seems to get rid of the nasty flickering you can get - * by positioning an xterm window along the top of the screen. - */ - bs->scrstrip->strip.lines = BLIT_MONOHEIGHT - 1; - bs->scrstrip->strip.linkl = 0; - bs->scrstrip->strip.linkh = 0; - bs->scrstrip->strip.tiles = DP_C_BIT | (1 - 1); - tiledesc(&bs->scrstrip->tile, - 0, 0, /* x, y */ - BLIT_MONOWIDTH, /* width of strip */ - BLIT_MONOWIDTH, /* width of bitmap */ - VM_TO_ADDR786(bm->fb.mono_fb, blt), /* the actual bitmap */ - 1); /* bits per pixel */ - - /* Copy into DP register block. */ - *(bs->dpctlregs) = blit_mparm; - bs->dpctlregs->descl = DP_ADDRLOW(VM_TO_ADDR786(bs->scrstrip, blt)); - bs->dpctlregs->desch = DP_ADDRHIGH(VM_TO_ADDR786(bs->scrstrip, blt)); - - /* Load the DP with the register block */ - loadall(blt, bs->dpctlregs); -} - - -/* - * Fill in a tile descriptor. - */ - -static -tiledesc(tile, x, y, w, ww, adx, bpp) - TILEDESC *tile; /* pointer to tile descriptor */ - int x; /* starting x in bitmap */ - int y; /* starting y in bitmap */ - int w; /* width of strip (in bits_) */ - int ww; /* actual width of bitmap (bits) */ - addr786_t adx; /* start of bitmap */ - int bpp; /* bits per pixel */ -{ - u_short bm_width; - short rghtp; - short adr_left, adr_right; - addr786_t bmstadr; - u_short start_stop_bit; - - bm_width = 2 * (((ww + 1) * bpp) / 16); - rghtp = x + w - 1; - adr_left = ((x * bpp) / 16) * 2; - adr_right = ((rghtp * bpp) / 16) * 2; - bmstadr = (ww * y) + adr_left + (int)adx; - start_stop_bit = ((((16 - 1) - ((x * bpp) % 16)) << 4) + - ((16 - ((rghtp + 1) * bpp) % 16) % 16) + - (bpp << 8)); - - tile->bitmapw = bm_width; - tile->meml = DP_ADDRLOW(bmstadr); - tile->memh = DP_ADDRHIGH(bmstadr); - tile->bppss = start_stop_bit; - tile->fetchcnt = adr_right - adr_left; - tile->flags = 0; -} - - -/* - * Cause the Display Processor to load its Control Registers from - * "vm_addr". - */ - -static -loadall(blt, vm_addr) -struct blitdev *blt; -DPCONTROLBLK *vm_addr; -{ - addr786_t blit_addr = VM_TO_ADDR786(vm_addr, blt); - int i; - - /* set up dp address */ - WRITEREG16(blt, DP_PARM1_REG, DP_ADDRLOW(blit_addr)); - WRITEREG16(blt, DP_PARM2_REG, DP_ADDRHIGH(blit_addr)); - - /* set blanking video */ - WRITEREG16(blt, DEF_VIDEO_REG, 0); - - /* load opcode to start dp */ - WRITEREG16(blt, DP_OPCODE_REG, DP_LOADALL); - - /* wait for acceptance */ - for (i = 0; i < DP_RDYTIMEOUT; ++i) - if (READREG(blt, DP_OPCODE_REG) & DECL) - break; - - if (i >= DP_RDYTIMEOUT) { - printf("Blit Display Processor timeout (loading registers)\n"); - hang: - goto hang; - } - -#ifdef notdef - /* wait for acceptance */ - CDELAY((READREG(blt, DP_OPCODE_REG) & DECL) != 0, DP_RDYTIMEOUT); - if ((READREG(blt, DP_OPCODE_REG) & DECL) == 0) { - printf("Blit Display Processor timeout (loading registers)\n"); - hang: - goto hang; - } -#endif /* notdef */ -} - - -/* - * blit_present: returns YES if Blit is present. For the first call, - * the hardware is probed. After that, a flag is used. - * Sets blitsoft[0].blt and blitsoft[0].physaddr. - */ - -#define TEST_BYTE 0xa5 /* should not be all 0's or 1's */ - -boolean_t -blit_present() -{ - static boolean_t present = FALSE; - static boolean_t initialized = FALSE; - struct blitdev *blt; - boolean_t blit_rom_ok(); - struct blitdev *mapblit(); - void freeblit(); - - /* - * We set "initialized" early on so that if the Blit init. code - * fails, kdb will still be able to use the EGA or VGA display - * (if present). - */ - if (initialized) - return(present); - initialized = TRUE; - - blit_reset_board(); - blt = mapblit((caddr_t)BLIT_BASE_ADDR, BLIT_MAPPED_SIZE); - setstatus(CARD_MAPPED); - if (blt == NULL) - panic("blit: can't map display"); - blt->graphmem[0] = TEST_BYTE; - present = FALSE; - if (blt->graphmem[0] == TEST_BYTE) { - setstatus(CARD_MAYBE_PRESENT); - present = blit_rom_ok(blt); - } - if (present) { - blitsoft[0].blt = blt; - blitsoft[0].physaddr = (caddr_t)BLIT_BASE_ADDR; - setstatus(CARD_PRESENT); - } - else - freeblit((vm_offset_t)blt, BLIT_MAPPED_SIZE); - return(present); -} - -#undef TEST_BYTE - - -/* - * mapblit: map the card into kernel vm and return the (virtual) - * address. - */ -struct blitdev * -mapblit(physaddr, length) -caddr_t physaddr; /* start of card */ -int length; /* num bytes to map */ -{ - vm_offset_t vmaddr; -#ifdef MACH_KERNEL - vm_offset_t io_map(); -#else /* MACH_KERNEL */ - vm_offset_t pmap_map_bd(); -#endif /* MACH_KERNEL */ - - if (physaddr != (caddr_t)trunc_page(physaddr)) - panic("Blit card not on page boundary"); - -#ifdef MACH_KERNEL - vmaddr = io_map((vm_offset_t)physaddr, length); - if (vmaddr == 0) -#else /* MACH_KERNEL */ - if (kmem_alloc_pageable(kernel_map, - &vmaddr, round_page(BLIT_MAPPED_SIZE)) - != KERN_SUCCESS) -#endif /* MACH_KERNEL */ - panic("can't alloc VM for Blit card"); - - (void)pmap_map_bd(vmaddr, (vm_offset_t)physaddr, - (vm_offset_t)physaddr+length, - VM_PROT_READ | VM_PROT_WRITE); - return((struct blitdev *)vmaddr); -} - - -/* - * freeblit: free card from memory. - * XXX - currently a no-op. - */ -void -freeblit(va, length) -vm_offset_t va; /* virt addr start of card */ -int length; -{ -} - - -/* - * blit_init: initialize globals & hardware, and set cursor. Could be - * called twice, once as part of kd initialization and once as part of - * blit initialization. Should not be called before blit_present() is - * called. - */ - -void -blit_init() -{ - static boolean_t initialized = FALSE; - struct blitmem *gmem; /* start of blit graphics memory */ - int card; - void getfontinfo(), clear_blit(); - - if (initialized) - return; - - for (card = 0; card < NBLIT; ++card) { - if (card > 0) { - blitsoft[card].blt = NULL; - blitsoft[card].physaddr = NULL; - } - blitsoft[card].open = FALSE; - blitsoft[card].scrstrip = NULL; - blitsoft[card].dpctlregs = NULL; - blitsoft[card].firstfree = 0; - } - - /* - * blit_memory_init allocates memory used by the Display Processor, - * so it comes before the call to init_dp. blit_memory_init - * potentially copies the font from ROM into the graphics memory, - * so it comes after the call to getfontinfo. - */ - getfontinfo(blitsoft[0].blt); /* get info & check assumptions */ - blit_memory_init(&blitsoft[0]); - - /* init 786 */ - init_biu(blitsoft[0].blt); - setstatus(BIU_INIT); - init_dp(&blitsoft[0]); - setstatus(DP_INIT); - - gmem = (struct blitmem *)blitsoft[0].blt->graphmem; - vid_start = gmem->fb.mono_fb; - kd_lines = 25; - kd_cols = 80; - kd_attr = KA_NORMAL; - - /* - * Use generic bitmap routines, no 786 assist (see - * blit_memory_init). - */ - kd_dput = bmpput; - kd_dmvup = bmpmvup; - kd_dmvdown = bmpmvdown; - kd_dclear = bmpclear; - kd_dsetcursor = bmpsetcursor; - kd_dreset = blitreboot; - - clear_blit(blitsoft[0].blt); - (*kd_dsetcursor)(0); - - initialized = TRUE; -} - - -/* - * blit_rom_ok: make sure we're looking at the ROM for a monochrome - * Blit. - */ - -boolean_t -blit_rom_ok(blt) - struct blitdev *blt; -{ - short magic; - short bpp; - - magic = READROM(blt->eprom, EP_MAGIC1); - if (magic != EP_MAGIC1_VAL) { -#ifdef notdef - printf("blit: magic1 bad (0x%x)\n", magic); -#endif - return(FALSE); - } - magic = READROM(blt->eprom, EP_MAGIC2); - if (magic != EP_MAGIC2_VAL) { -#ifdef notdef - printf("blit: magic2 bad (0x%x)\n", magic); -#endif - return(FALSE); - } - bpp = READROM(blt->eprom, EP_BPP); - if (bpp != 1) { -#ifdef notdef - printf("blit: not monochrome board (bpp = 0x%x)\n", bpp); -#endif - return(FALSE); - } - - return(TRUE); -} - - -/* - * getfontinfo: get information about the font and make sure that - * our simplifying assumptions are valid. - */ - -void -getfontinfo(blt) - struct blitdev *blt; -{ - u_char *rom = blt->eprom; - short fontoffset; - short pick_cursor_height(); - - fb_width = BLIT_MONOWIDTH; - fb_height = BLIT_MONOHEIGHT; - chars_in_font = READROM(rom, EP_NUMCHARS); - char_width = READROM(rom, EP_CHARWIDTH); - char_height = READROM(rom, EP_CHARHEIGHT); - fontoffset = READROM(rom, EP_FONTSTART); - xstart = READROM(rom, EP_XSTART); - ystart = READROM(rom, EP_YSTART); - char_black = BLIT_BLACK_BYTE; - char_white = BLIT_WHITE_BYTE; - - font_start = rom + fontoffset; - - /* - * Check byte-alignment assumption. - * XXX - does it do any good to panic when initializing the - * console driver? - */ - if (char_width % 8 != 0) - panic("blit: char width not integral num of bytes"); - if (xstart % 8 != 0) { - /* move it to a more convenient location */ - printf("blit: console corner moved.\n"); - xstart = 8 * (xstart/8); - } - - cursor_height = pick_cursor_height(); - char_byte_width = char_width / 8; - fb_byte_width = BLIT_MONOWIDTH / 8; - font_byte_width = char_byte_width * chars_in_font; -} - - -/* - * pick_cursor_height: pick a size for the cursor, based on the font - * size. - */ - -short -pick_cursor_height() -{ - int scl_avail; /* scan lines available for console */ - int scl_per_line; /* scan lines per console line */ - - /* - * scan lines avail. = total lines - top margin; - * no bottom margin (XXX). - */ - scl_avail = BLIT_MONOHEIGHT - ystart; - - scl_per_line = scl_avail / kd_lines; - if (scl_per_line < char_height) - return(1); - else - return(scl_per_line - char_height); -} - - -/* - * setstatus: Give a status indication to the user. Ideally, we'd - * just set the 3 user-controlled LED's. Unfortunately, that doesn't - * seem to work. So, we ring the bell. - */ - -static void -setstatus(val) - int val; -{ - union blit_diag_reg diag; - - diag.byte = inb(BLIT_DIAG_ADDR); - diag.reg.led0 = (val & 1) ? BLIT_LED_ON : BLIT_LED_OFF; - diag.reg.led1 = (val & 2) ? BLIT_LED_ON : BLIT_LED_OFF; - diag.reg.led2 = (val & 4) ? BLIT_LED_ON : BLIT_LED_OFF; - outb(BLIT_DIAG_ADDR, diag.byte); - -#ifdef DEBUG - for (val &= 7; val > 0; val--) { - feep(); - pause(); - } - for (val = 0; val < 10; val++) { - pause(); - } -#endif -} - - - -/*********** - * - * Other (non-initialization) routines. - * - ***********/ - - -/* - * Open - Verify that minor device is OK and not in use, then clear - * the screen. - */ - -/*ARGSUSED*/ -int -blitopen(dev, flag) - dev_t dev; - int flag; -{ - void clear_blit(); - int which = minor(dev); - - if (!blit_present() || which >= NBLIT) - return(ENXIO); - if (blitsoft[which].open) - return(EBUSY); - - clear_blit(blitsoft[which].blt); - blitsoft[which].open = TRUE; - return(0); /* ok */ -} - - -/* - * Close - free any kernel memory structures that were allocated while - * the device was open (currently none). - */ - -/*ARGSUSED*/ -blitclose(dev, flag) - dev_t dev; - int flag; -{ - int which = minor(dev); - - if (!blitsoft[which].open) - panic("blit: closing not-open device??"); - blitsoft[which].open = FALSE; -} - - -/* - * Mmap. - */ - -/*ARGSUSED*/ -int -blitmmap(dev, off, prot) - dev_t dev; - off_t off; - int prot; -{ - if ((u_int) off >= BLIT_MAPPED_SIZE) - return(-1); - - /* Get page frame number for the page to be mapped. */ - return(i386_btop(blitsoft[minor(dev)].physaddr + off)); -} - - -/* - * Ioctl. - */ - -#ifdef MACH_KERNEL -io_return_t blit_get_stat(dev, flavor, data, count) - dev_t dev; - int flavor; - int *data; /* pointer to OUT array */ - unsigned int *count; /* OUT */ -{ - int which = minor(dev); - - switch (flavor) { - case BLIT_1ST_UNUSED: - if (*count < 1) - return (D_INVALID_OPERATION); - *data = blitsoft[which].firstfree; - *count = 1; - break; - default: - return (D_INVALID_OPERATION); - } - return (D_SUCCESS); -} -#else /* MACH_KERNEL */ -/*ARGSUSED*/ -int -blitioctl(dev, cmd, data, flag) - dev_t dev; - int cmd; - caddr_t data; - int flag; -{ - int which = minor(dev); - int err = 0; - - switch (cmd) { - case BLIT_1ST_UNUSED: - *(int *)data = blitsoft[which].firstfree; - break; - default: - err = ENOTTY; - } - - return(err); -} -#endif /* MACH_KERNEL */ - -/* - * clear_blit: clear blit's screen. - */ - -void -clear_blit(blt) - struct blitdev *blt; -{ - (*kd_dclear)(0, kd_lines*kd_cols, KA_NORMAL); -} - -/* - * Put the board into DOS mode in preparation for rebooting. - */ - -void -blitreboot() -{ - union blit_config_reg config; - - config.byte = inb(BLIT_CONFIG_ADDR); - config.reg.mode = BLIT_DOS_MODE; - config.reg.invisible = BLIT_VISIBLE; - outb(BLIT_CONFIG_ADDR, config.byte); -} - -#endif /* NBLIT > 0 */ -#endif /* NBLIT > MAXBLITS */ |