/* $OpenBSD: cgfourteen.c,v 1.5 2001/05/10 10:34:43 art Exp $ */ /* $NetBSD: cgfourteen.c,v 1.7 1997/05/24 20:16:08 pk Exp $ */ /* * Copyright (c) 1996 * The President and Fellows of Harvard College. All rights reserved. * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This software was developed by the Computer Systems Engineering group * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and * contributed to Berkeley. * * All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Harvard University. * This product includes software developed by the University of * California, Lawrence Berkeley Laboratory. * * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * This product includes software developed by Harvard University and * its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. * * Based on: * NetBSD: cgthree.c,v 1.28 1996/05/31 09:59:22 pk Exp * NetBSD: cgsix.c,v 1.25 1996/04/01 17:30:00 christos Exp */ /* * Driver for Campus-II on-board mbus-based video (cgfourteen). * Provides minimum emulation of a Sun cgthree 8-bit framebuffer to * allow X to run. * * Does not handle interrupts, even though they can occur. * * XXX should defer colormap updates to vertical retrace interrupts */ /* * The following is for debugging only; it opens up a security hole * enabled by allowing any user to map the control registers for the * cg14 into their space. */ #undef CG14_MAP_REGS /* * The following enables 24-bit operation: when opened, the framebuffer * will switch to 24-bit mode (actually 32-bit mode), and provide a * simple cg8 emulation. * * XXX Note that the code enabled by this define is currently untested/broken. */ #undef CG14_CG8 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* autoconfiguration driver */ static void cgfourteenattach(struct device *, struct device *, void *); static int cgfourteenmatch(struct device *, void *, void *); static void cgfourteenunblank(struct device *); /* cdevsw prototypes */ cdev_decl(cgfourteen); struct cfattach cgfourteen_ca = { sizeof(struct cgfourteen_softc), cgfourteenmatch, cgfourteenattach }; struct cfdriver cgfourteen_cd = { NULL, "cgfourteen", DV_DULL }; /* frame buffer generic driver */ static struct fbdriver cgfourteenfbdriver = { cgfourteenunblank, cgfourteenopen, cgfourteenclose, cgfourteenioctl, cgfourteenmmap }; extern int fbnode; extern struct tty *fbconstty; static void cg14_set_video __P((struct cgfourteen_softc *, int)); static int cg14_get_video __P((struct cgfourteen_softc *)); static int cg14_get_cmap __P((struct fbcmap *, union cg14cmap *, int)); static int cg14_put_cmap __P((struct fbcmap *, union cg14cmap *, int)); static void cg14_load_hwcmap __P((struct cgfourteen_softc *, int, int)); static void cg14_init __P((struct cgfourteen_softc *)); static void cg14_reset __P((struct cgfourteen_softc *)); static void cg14_loadomap __P((struct cgfourteen_softc *));/* cursor overlay */ static void cg14_setcursor __P((struct cgfourteen_softc *));/* set position */ static void cg14_loadcursor __P((struct cgfourteen_softc *));/* set shape */ /* * Match a cgfourteen. */ int cgfourteenmatch(parent, vcf, aux) struct device *parent; void *vcf, *aux; { struct cfdata *cf = vcf; struct confargs *ca = aux; struct romaux *ra = &ca->ca_ra; /* * Mask out invalid flags from the user. */ cf->cf_flags &= FB_USERMASK; /* Check driver name */ if (strcmp(cf->cf_driver->cd_name, ra->ra_name)) return (0); /* * The cgfourteen is a local-bus video adaptor, accessed directly * via the processor, and not through device space or an external * bus. Thus we look _only_ at the obio bus. * Additionally, these things exist only on the Sun4m. */ if (CPU_ISSUN4M && ca->ca_bustype == BUS_OBIO) return(1); return (0); } /* * Attach a display. We need to notice if it is the console, too. */ void cgfourteenattach(parent, self, args) struct device *parent, *self; void *args; { register struct cgfourteen_softc *sc = (struct cgfourteen_softc *)self; register struct confargs *ca = args; register int node = 0, ramsize; register u_int32_t *lut; int i, isconsole; sc->sc_fb.fb_driver = &cgfourteenfbdriver; sc->sc_fb.fb_device = &sc->sc_dev; sc->sc_fb.fb_flags = sc->sc_dev.dv_cfdata->cf_flags; /* * We're emulating a cg3/8, so represent ourselves as one */ #ifdef CG14_CG8 sc->sc_fb.fb_type.fb_type = FBTYPE_MEMCOLOR; #else sc->sc_fb.fb_type.fb_type = FBTYPE_SUN3COLOR; #endif node = ca->ca_ra.ra_node; #ifdef CG14_CG8 sc->sc_fb.fb_type.fb_depth = 32; #else sc->sc_fb.fb_type.fb_depth = 8; #endif fb_setsize(&sc->sc_fb, sc->sc_fb.fb_type.fb_depth, 1152, 900, node, ca->ca_bustype); ramsize = round_page(sc->sc_fb.fb_type.fb_height * sc->sc_fb.fb_linebytes); sc->sc_fb.fb_type.fb_cmsize = CG14_CLUT_SIZE; sc->sc_fb.fb_type.fb_size = ramsize; /* * Now map in the 8 useful pages of registers */ if (ca->ca_ra.ra_len < 0x10000) { #ifdef DIAGNOSTIC printf("warning: can't find all cgfourteen registers...\n"); #endif ca->ca_ra.ra_len = 0x10000; } sc->sc_ctl = (struct cg14ctl *) mapiodev(ca->ca_ra.ra_reg, 0, ca->ca_ra.ra_len); sc->sc_hwc = (struct cg14curs *) ((u_int)sc->sc_ctl + CG14_OFFSET_CURS); sc->sc_dac = (struct cg14dac *) ((u_int)sc->sc_ctl + CG14_OFFSET_DAC); sc->sc_xlut = (struct cg14xlut *) ((u_int)sc->sc_ctl + CG14_OFFSET_XLUT); sc->sc_clut1 = (struct cg14clut *) ((u_int)sc->sc_ctl + CG14_OFFSET_CLUT1); sc->sc_clut2 = (struct cg14clut *) ((u_int)sc->sc_ctl + CG14_OFFSET_CLUT2); sc->sc_clut3 = (struct cg14clut *) ((u_int)sc->sc_ctl + CG14_OFFSET_CLUT3); sc->sc_clutincr = (u_int *) ((u_int)sc->sc_ctl + CG14_OFFSET_CLUTINCR); /* * Stash the physical address of the framebuffer for use by mmap */ if (ca->ca_ra.ra_nreg < 2) panic("cgfourteen with only one register set; can't find" " framebuffer"); sc->sc_phys = ca->ca_ra.ra_reg[1]; #if defined(DEBUG) && defined(CG14_MAP_REGS) /* Store the physical address of the control registers */ sc->sc_regphys = ca->ca_ra.ra_reg[0]; #endif /* * Let the user know that we're here */ #ifdef CG14_CG8 printf(": cgeight emulated at %dx%dx24bpp", sc->sc_fb.fb_type.fb_width, sc->sc_fb.fb_type.fb_height); #else printf(": cgthree emulated at %dx%dx8bpp", sc->sc_fb.fb_type.fb_width, sc->sc_fb.fb_type.fb_height); #endif /* * Enable the video, but don't change the pixel depth. */ cg14_set_video(sc, 1); /* * Grab the initial colormap */ lut = (u_int32_t *) sc->sc_clut1->clut_lut; for (i = 0; i < CG14_CLUT_SIZE; i++) sc->sc_cmap.cm_chip[i] = lut[i]; /* See if we're the console */ isconsole = node == fbnode && fbconstty != NULL; /* * We don't use the raster console since the cg14 is fast enough * already. */ #ifdef notdef /* * When the ROM has mapped in a cgfourteen display, the address * maps only the video RAM, so in any case we have to map the * registers ourselves. We only need the video RAM if we are * going to print characters via rconsole. */ if ((sc->sc_fb.fb_pixels = ca->ca_ra.ra_vaddr) == NULL && isconsole) { /* this probably cannot happen, but what the heck */ sc->sc_fb.fb_pixels = mapiodev(ca->ca_ra.ra_reg, CG3REG_MEM, ramsize); } #endif /* notdef */ if (isconsole) { printf(" (console)\n"); #ifdef notdef #ifdef RASTERCONSOLE fbrcons_init(&sc->sc_fb); #endif #endif /* notdef */ } else printf("\n"); /* Attach to /dev/fb */ if (node == fbnode) fb_attach(&sc->sc_fb, isconsole); } /* * Keep track of the number of opens made. In the 24-bit driver, we need to * switch to 24-bit mode on the first open, and switch back to 8-bit on * the last close. This kind of nonsense is needed to give screenblank * a fighting chance of working. */ static int cg14_opens = 0; int cgfourteenopen(dev, flags, mode, p) dev_t dev; int flags, mode; struct proc *p; { register struct cgfourteen_softc *sc = cgfourteen_cd.cd_devs[minor(dev)]; int unit = minor(dev); int s, oldopens; if (unit >= cgfourteen_cd.cd_ndevs || cgfourteen_cd.cd_devs[unit] == NULL) return (ENXIO); s = splhigh(); oldopens = cg14_opens++; splx(s); /* Setup the cg14 as we want it, and save the original PROM state */ if (oldopens == 0) /* first open only, to make screenblank work */ cg14_init(sc); return (0); } int cgfourteenclose(dev, flags, mode, p) dev_t dev; int flags, mode; struct proc *p; { register struct cgfourteen_softc *sc = cgfourteen_cd.cd_devs[minor(dev)]; int s, opens; s = splhigh(); opens = --cg14_opens; if (cg14_opens < 0) opens = cg14_opens = 0; splx(s); /* * Restore video state to make the PROM happy, on last close. */ if (opens == 0) cg14_reset(sc); return (0); } int cgfourteenioctl(dev, cmd, data, flags, p) dev_t dev; u_long cmd; register caddr_t data; int flags; struct proc *p; { register struct cgfourteen_softc *sc = cgfourteen_cd.cd_devs[minor(dev)]; register struct fbgattr *fba; union cg14cursor_cmap tcm; int v, error; u_int count; switch (cmd) { case FBIOGTYPE: *(struct fbtype *)data = sc->sc_fb.fb_type; break; case FBIOGATTR: fba = (struct fbgattr *)data; fba->real_type = FBTYPE_MDICOLOR; fba->owner = 0; /* XXX ??? */ fba->fbtype = sc->sc_fb.fb_type; fba->sattr.flags = 0; fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; fba->sattr.dev_specific[0] = -1; fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; fba->emu_types[1] = -1; break; case FBIOGETCMAP: return (cg14_get_cmap((struct fbcmap *)data, &sc->sc_cmap, CG14_CLUT_SIZE)); case FBIOPUTCMAP: /* copy to software map */ #define p ((struct fbcmap *)data) #ifdef CG14_CG8 p->index &= 0xffffff; #endif error = cg14_put_cmap(p, &sc->sc_cmap, CG14_CLUT_SIZE); if (error) return (error); /* now blast them into the chip */ /* XXX should use retrace interrupt */ cg14_load_hwcmap(sc, p->index, p->count); #undef p break; case FBIOGVIDEO: *(int *)data = cg14_get_video(sc); break; case FBIOSVIDEO: cg14_set_video(sc, *(int *)data); break; /* these are for both FBIOSCURSOR and FBIOGCURSOR */ #define p ((struct fbcursor *)data) #define cc (&sc->sc_cursor) case FBIOGCURSOR: /* do not quite want everything here... */ p->set = FB_CUR_SETALL; /* close enough, anyway */ p->enable = cc->cc_enable; p->pos = cc->cc_pos; p->hot = cc->cc_hot; p->size = cc->cc_size; /* begin ugh ... can we lose some of this crap?? */ if (p->image != NULL) { count = cc->cc_size.y * 32 / NBBY; error = copyout((caddr_t)cc->cc_cplane, (caddr_t)p->image, count); if (error) return (error); error = copyout((caddr_t)cc->cc_eplane, (caddr_t)p->mask, count); if (error) return (error); } if (p->cmap.red != NULL) { error = cg14_get_cmap(&p->cmap, (union cg14cmap *)&cc->cc_color, 2); if (error) return (error); } else { p->cmap.index = 0; p->cmap.count = 2; } /* end ugh */ break; case FBIOSCURSOR: /* * For setcmap and setshape, verify parameters, so that * we do not get halfway through an update and then crap * out with the software state screwed up. */ v = p->set; if (v & FB_CUR_SETCMAP) { /* * This use of a temporary copy of the cursor * colormap is not terribly efficient, but these * copies are small (8 bytes)... */ tcm = cc->cc_color; error = cg14_put_cmap(&p->cmap, (union cg14cmap *)&tcm, 2); if (error) return (error); } if (v & FB_CUR_SETSHAPE) { if ((u_int)p->size.x > 32 || (u_int)p->size.y > 32) return (EINVAL); count = p->size.y * 32 / NBBY; if (!uvm_useracc(p->image, count, B_READ) || !uvm_useracc(p->mask, count, B_READ)) return (EFAULT); } /* parameters are OK; do it */ if (v & (FB_CUR_SETCUR | FB_CUR_SETPOS | FB_CUR_SETHOT)) { if (v & FB_CUR_SETCUR) cc->cc_enable = p->enable; if (v & FB_CUR_SETPOS) cc->cc_pos = p->pos; if (v & FB_CUR_SETHOT) cc->cc_hot = p->hot; cg14_setcursor(sc); } if (v & FB_CUR_SETCMAP) { cc->cc_color = tcm; cg14_loadomap(sc); /* XXX defer to vertical retrace */ } if (v & FB_CUR_SETSHAPE) { cc->cc_size = p->size; count = p->size.y * 32 / NBBY; bzero((caddr_t)cc->cc_eplane, sizeof cc->cc_eplane); bzero((caddr_t)cc->cc_cplane, sizeof cc->cc_cplane); bcopy(p->mask, (caddr_t)cc->cc_eplane, count); bcopy(p->image, (caddr_t)cc->cc_cplane, count); cg14_loadcursor(sc); } break; #undef cc #undef p case FBIOGCURPOS: *(struct fbcurpos *)data = sc->sc_cursor.cc_pos; break; case FBIOSCURPOS: sc->sc_cursor.cc_pos = *(struct fbcurpos *)data; cg14_setcursor(sc); break; case FBIOGCURMAX: /* max cursor size is 32x32 */ ((struct fbcurpos *)data)->x = 32; ((struct fbcurpos *)data)->y = 32; break; default: return (ENOTTY); } return (0); } /* * Undo the effect of an FBIOSVIDEO that turns the video off. */ static void cgfourteenunblank(dev) struct device *dev; { cg14_set_video((struct cgfourteen_softc *)dev, 1); } /* * Return the address that would map the given device at the given * offset, allowing for the given protection, or return -1 for error. * * The cg14 frame buffer can be mapped in either 8-bit or 32-bit mode * starting at the address stored in the PROM. In 8-bit mode, the X * channel is not present, and can be ignored. In 32-bit mode, mapping * at 0K delivers a 32-bpp buffer where the upper 8 bits select the X * channel information. We hardwire the Xlut to all zeroes to insure * that, regardless of this value, direct 24-bit color access will be * used. * * Alternatively, mapping the frame buffer at an offset of 16M seems to * tell the chip to ignore the X channel. XXX where does it get the X value * to use? */ int cgfourteenmmap(dev, off, prot) dev_t dev; int off, prot; { register struct cgfourteen_softc *sc = cgfourteen_cd.cd_devs[minor(dev)]; #define CG3START (128*1024 + 128*1024) #define CG8START (256*1024) #define NOOVERLAY (0x04000000) if (off & PGOFSET) panic("cgfourteenmmap"); if (off < 0) return (-1); #if defined(DEBUG) && defined(CG14_MAP_REGS) /* XXX: security hole */ /* * Map the control registers into user space. Should only be * used for debugging! */ if ((u_int)off >= 0x10000000 && (u_int)off < 0x10000000 + 16*4096) { off -= 0x10000000; return (REG2PHYS(&sc->sc_regphys, off, 0) | PMAP_NC); } #endif if ((u_int)off >= NOOVERLAY) off -= NOOVERLAY; #ifdef CG14_CG8 else if ((u_int)off >= CG8START) { off -= CG8START; } #else else if ((u_int)off >= CG3START) off -= CG3START; #endif else off = 0; if ((unsigned)off >= sc->sc_fb.fb_type.fb_size * sc->sc_fb.fb_type.fb_depth/8) { #ifdef DEBUG printf("\nmmap request out of bounds: request 0x%x, " "bound 0x%x\n", (unsigned) off, (unsigned)sc->sc_fb.fb_type.fb_size); #endif return (-1); } /* * Use PMAP_NC to disable the cache, since otherwise refresh is * very confused. */ return (REG2PHYS(&sc->sc_phys, off) | PMAP_NC); } /* * Miscellaneous helper functions */ /* Initialize the framebuffer, storing away useful state for later reset */ static void cg14_init(sc) struct cgfourteen_softc *sc; { register u_int32_t *clut; register u_int8_t *xlut; register int i; /* * We stash away the following to restore on close: * * color look-up table 1 (sc->sc_saveclut) * x look-up table (sc->sc_savexlut) * control register (sc->sc_savectl) * cursor control register (sc->sc_savehwc) */ sc->sc_savectl = sc->sc_ctl->ctl_mctl; sc->sc_savehwc = sc->sc_hwc->curs_ctl; clut = (u_int32_t *) sc->sc_clut1->clut_lut; xlut = (u_int8_t *) sc->sc_xlut->xlut_lut; for (i = 0; i < CG14_CLUT_SIZE; i++) { sc->sc_saveclut.cm_chip[i] = clut[i]; sc->sc_savexlut[i] = xlut[i]; } #ifdef CG14_CG8 /* * Enable the video, and put in 24 bit mode. */ sc->sc_ctl->ctl_mctl = CG14_MCTL_ENABLEVID | CG14_MCTL_PIXMODE_32 | CG14_MCTL_POWERCTL; /* * Zero the xlut to enable direct-color mode */ bzero(sc->sc_xlut, CG14_CLUT_SIZE); #else /* * Enable the video and put it in 8 bit mode */ sc->sc_ctl->ctl_mctl = CG14_MCTL_ENABLEVID | CG14_MCTL_PIXMODE_8 | CG14_MCTL_POWERCTL; #endif } static void cg14_reset(sc) /* Restore the state saved on cg14_init */ struct cgfourteen_softc *sc; { register u_int32_t *clut; register u_int8_t *xlut; register int i; /* * We restore the following, saved in cg14_init: * * color look-up table 1 (sc->sc_saveclut) * x look-up table (sc->sc_savexlut) * control register (sc->sc_savectl) * cursor control register (sc->sc_savehwc) * * Note that we don't touch the video enable bits in the * control register; otherwise, screenblank wouldn't work. */ sc->sc_ctl->ctl_mctl = (sc->sc_ctl->ctl_mctl & (CG14_MCTL_ENABLEVID | CG14_MCTL_POWERCTL)) | (sc->sc_savectl & ~(CG14_MCTL_ENABLEVID | CG14_MCTL_POWERCTL)); sc->sc_hwc->curs_ctl = sc->sc_savehwc; clut = (u_int32_t *) sc->sc_clut1->clut_lut; xlut = (u_int8_t *) sc->sc_xlut->xlut_lut; for (i = 0; i < CG14_CLUT_SIZE; i++) { clut[i] = sc->sc_saveclut.cm_chip[i]; xlut[i] = sc->sc_savexlut[i]; } } /* Enable/disable video display; power down monitor if DPMS-capable */ static void cg14_set_video(sc, enable) struct cgfourteen_softc *sc; int enable; { /* * We can only use DPMS to power down the display if the chip revision * is greater than 0. */ if (enable) { if ((sc->sc_ctl->ctl_rsr & CG14_RSR_REVMASK) > 0) sc->sc_ctl->ctl_mctl |= (CG14_MCTL_ENABLEVID | CG14_MCTL_POWERCTL); else sc->sc_ctl->ctl_mctl |= CG14_MCTL_ENABLEVID; } else { if ((sc->sc_ctl->ctl_rsr & CG14_RSR_REVMASK) > 0) sc->sc_ctl->ctl_mctl &= ~(CG14_MCTL_ENABLEVID | CG14_MCTL_POWERCTL); else sc->sc_ctl->ctl_mctl &= ~CG14_MCTL_ENABLEVID; } } /* Get status of video display */ static int cg14_get_video(sc) struct cgfourteen_softc *sc; { return ((sc->sc_ctl->ctl_mctl & CG14_MCTL_ENABLEVID) != 0); } /* Read the software shadow colormap */ static int cg14_get_cmap(p, cm, cmsize) register struct fbcmap *p; union cg14cmap *cm; int cmsize; { register u_int i, start, count; register u_char *cp; start = p->index; count = p->count; if (start >= cmsize || start + count > cmsize) #ifdef DEBUG { printf("putcmaperror: start %d cmsize %d count %d\n", start,cmsize,count); #endif return (EINVAL); #ifdef DEBUG } #endif if (!uvm_useracc(p->red, count, B_WRITE) || !uvm_useracc(p->green, count, B_WRITE) || !uvm_useracc(p->blue, count, B_WRITE)) return (EFAULT); for (cp = &cm->cm_map[start][0], i = 0; i < count; cp += 4, i++) { p->red[i] = cp[3]; p->green[i] = cp[2]; p->blue[i] = cp[1]; } return (0); } /* Write the software shadow colormap */ static int cg14_put_cmap(p, cm, cmsize) register struct fbcmap *p; union cg14cmap *cm; int cmsize; { register u_int i, start, count; register u_char *cp; start = p->index; count = p->count; if (start >= cmsize || start + count > cmsize) #ifdef DEBUG { printf("putcmaperror: start %d cmsize %d count %d\n", start,cmsize,count); #endif return (EINVAL); #ifdef DEBUG } #endif if (!uvm_useracc(p->red, count, B_READ) || !uvm_useracc(p->green, count, B_READ) || !uvm_useracc(p->blue, count, B_READ)) return (EFAULT); for (cp = &cm->cm_map[start][0], i = 0; i < count; cp += 4, i++) { cp[3] = p->red[i]; cp[2] = p->green[i]; cp[1] = p->blue[i]; cp[0] = 0; /* no alpha channel */ } return (0); } static void cg14_load_hwcmap(sc, start, ncolors) register struct cgfourteen_softc *sc; register int start, ncolors; { /* XXX switch to auto-increment, and on retrace intr */ /* Setup pointers to source and dest */ register u_int32_t *colp = &sc->sc_cmap.cm_chip[start]; volatile register u_int32_t *lutp = &sc->sc_clut1->clut_lut[start]; /* Copy by words */ while (--ncolors >= 0) *lutp++ = *colp++; } /* * Load the cursor (overlay `foreground' and `background') colors. */ static void cg14_setcursor(sc) register struct cgfourteen_softc *sc; { /* we need to subtract the hot-spot value here */ #define COORD(f) (sc->sc_cursor.cc_pos.f - sc->sc_cursor.cc_hot.f) sc->sc_hwc->curs_ctl = (sc->sc_cursor.cc_enable ? CG14_CURS_ENABLE : 0); sc->sc_hwc->curs_x = COORD(x); sc->sc_hwc->curs_y = COORD(y); #undef COORD } static void cg14_loadcursor(sc) register struct cgfourteen_softc *sc; { register volatile struct cg14curs *hwc; register u_int edgemask, m; register int i; /* * Keep the top size.x bits. Here we *throw out* the top * size.x bits from an all-one-bits word, introducing zeros in * the top size.x bits, then invert all the bits to get what * we really wanted as our mask. But this fails if size.x is * 32---a sparc uses only the low 5 bits of the shift count--- * so we have to special case that. */ edgemask = ~0; if (sc->sc_cursor.cc_size.x < 32) edgemask = ~(edgemask >> sc->sc_cursor.cc_size.x); hwc = sc->sc_hwc; for (i = 0; i < 32; i++) { m = sc->sc_cursor.cc_eplane[i] & edgemask; hwc->curs_plane0[i] = m; hwc->curs_plane1[i] = m & sc->sc_cursor.cc_cplane[i]; } } static void cg14_loadomap(sc) register struct cgfourteen_softc *sc; { /* set background color */ sc->sc_hwc->curs_color1 = sc->sc_cursor.cc_color.cm_chip[0]; /* set foreground color */ sc->sc_hwc->curs_color2 = sc->sc_cursor.cc_color.cm_chip[1]; }