/* $NetBSD: mfb.c,v 1.60 2018/01/24 05:35:58 riastradh Exp $ */ /*- * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Tohru Nishimura. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ #include __KERNEL_RCSID(0, "$NetBSD: mfb.c,v 1.60 2018/01/24 05:35:58 riastradh Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if defined(pmax) #define machine_btop(x) mips_btop(MIPS_KSEG1_TO_PHYS(x)) #endif #if defined(alpha) #define machine_btop(x) alpha_btop(ALPHA_K0SEG_TO_PHYS(x)) #endif /* Bt455 hardware registers, memory-mapped in 32bit stride */ #define bt_reg 0x0 #define bt_cmap 0x4 #define bt_clr 0x8 #define bt_ovly 0xc /* Bt431 hardware registers, memory-mapped in 32bit stride */ #define bt_lo 0x0 #define bt_hi 0x4 #define bt_ram 0x8 #define bt_ctl 0xc #define REGWRITE32(p,i,v) do { \ *(volatile uint32_t *)((p) + (i)) = (v); tc_wmb(); \ } while (0) #define SELECT455(p,r) do { \ REGWRITE32((p), bt_reg, (r)); \ REGWRITE32((p), bt_clr, 0); \ } while (0) #define TWIN(x) ((x)|((x) << 8)) #define TWIN_LO(x) (twin = (x) & 0x00ff, twin << 8 | twin) #define TWIN_HI(x) (twin = (x) & 0xff00, twin | twin >> 8) #define SELECT431(p,r) do { \ REGWRITE32((p), bt_lo, TWIN(r)); \ REGWRITE32((p), bt_hi, 0); \ } while (0) struct hwcursor64 { struct wsdisplay_curpos cc_pos; struct wsdisplay_curpos cc_hot; struct wsdisplay_curpos cc_size; struct wsdisplay_curpos cc_magic; #define CURSOR_MAX_SIZE 64 uint8_t cc_color[6]; uint64_t cc_image[CURSOR_MAX_SIZE]; uint64_t cc_mask[CURSOR_MAX_SIZE]; }; struct mfb_softc { vaddr_t sc_vaddr; size_t sc_size; struct rasops_info *sc_ri; struct hwcursor64 sc_cursor; /* software copy of cursor */ int sc_blanked; int sc_curenb; /* cursor sprite enabled */ int sc_changed; /* need update of hardware */ int nscreens; }; #define MX_MAGIC_X 360 #define MX_MAGIC_Y 36 #define MX_FB_OFFSET 0x200000 #define MX_FB_SIZE 0x200000 #define MX_BT455_OFFSET 0x100000 #define MX_BT431_OFFSET 0x180000 #define MX_IREQ_OFFSET 0x080000 /* Interrupt req. control */ static int mfbmatch(device_t, cfdata_t, void *); static void mfbattach(device_t, device_t, void *); CFATTACH_DECL_NEW(mfb, sizeof(struct mfb_softc), mfbmatch, mfbattach, NULL, NULL); static void mfb_common_init(struct rasops_info *); static struct rasops_info mfb_console_ri; static tc_addr_t mfb_consaddr; static struct wsscreen_descr mfb_stdscreen = { "std", 0, 0, 0, /* textops */ 0, 0, WSSCREEN_REVERSE }; static const struct wsscreen_descr *_mfb_scrlist[] = { &mfb_stdscreen, }; static const struct wsscreen_list mfb_screenlist = { sizeof(_mfb_scrlist) / sizeof(struct wsscreen_descr *), _mfb_scrlist }; static int mfbioctl(void *, void *, u_long, void *, int, struct lwp *); static paddr_t mfbmmap(void *, void *, off_t, int); static int mfb_alloc_screen(void *, const struct wsscreen_descr *, void **, int *, int *, long *); static void mfb_free_screen(void *, void *); static int mfb_show_screen(void *, void *, int, void (*) (void *, int, int), void *); static const struct wsdisplay_accessops mfb_accessops = { mfbioctl, mfbmmap, mfb_alloc_screen, mfb_free_screen, mfb_show_screen, 0 /* load_font */ }; int mfb_cnattach(tc_addr_t); static int mfbintr(void *); static void mfbhwinit(void *); static int set_cursor(struct mfb_softc *, struct wsdisplay_cursor *); static int get_cursor(struct mfb_softc *, struct wsdisplay_cursor *); static void set_curpos(struct mfb_softc *, struct wsdisplay_curpos *); /* bit order reverse */ static const uint8_t flip[256] = { 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0, 0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0, 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8, 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8, 0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4, 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4, 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec, 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc, 0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2, 0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2, 0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea, 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa, 0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6, 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6, 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee, 0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe, 0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1, 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1, 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9, 0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9, 0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5, 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5, 0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed, 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd, 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3, 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3, 0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb, 0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb, 0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7, 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7, 0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef, 0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff, }; static int mfbmatch(device_t parent, cfdata_t match, void *aux) { struct tc_attach_args *ta = aux; if (strncmp("PMAG-AA ", ta->ta_modname, TC_ROM_LLEN) != 0) return (0); return (1); } static void mfbattach(device_t parent, device_t self, void *aux) { struct mfb_softc *sc = device_private(self); struct tc_attach_args *ta = aux; struct rasops_info *ri; struct wsemuldisplaydev_attach_args waa; int console; volatile register int junk; console = (ta->ta_addr == mfb_consaddr); if (console) { sc->sc_ri = ri = &mfb_console_ri; ri->ri_flg &= ~RI_NO_AUTO; sc->nscreens = 1; } else { ri = malloc(sizeof(struct rasops_info), M_DEVBUF, M_NOWAIT); if (ri == NULL) { printf(": can't alloc memory\n"); return; } memset(ri, 0, sizeof(struct rasops_info)); ri->ri_hw = (void *)ta->ta_addr; mfb_common_init(ri); sc->sc_ri = ri; } printf(": %dx%d, 1bpp\n", ri->ri_width, ri->ri_height); sc->sc_vaddr = ta->ta_addr; sc->sc_cursor.cc_magic.x = MX_MAGIC_X; sc->sc_cursor.cc_magic.y = MX_MAGIC_Y; sc->sc_blanked = sc->sc_curenb = 0; tc_intr_establish(parent, ta->ta_cookie, IPL_TTY, mfbintr, sc); /* clear any pending interrupts */ *(uint8_t *)((char *)ri->ri_hw + MX_IREQ_OFFSET) = 0; junk = *(uint8_t *)((char *)ri->ri_hw + MX_IREQ_OFFSET); __USE(junk); *(uint8_t *)((char *)ri->ri_hw + MX_IREQ_OFFSET) = 1; waa.console = console; waa.scrdata = &mfb_screenlist; waa.accessops = &mfb_accessops; waa.accesscookie = sc; config_found(self, &waa, wsemuldisplaydevprint); } static void mfb_common_init(struct rasops_info *ri) { char *base; int cookie; base = (void *)ri->ri_hw; /* initialize colormap and cursor hardware */ mfbhwinit(base); ri->ri_flg = RI_CENTER | RI_FORCEMONO; if (ri == &mfb_console_ri) ri->ri_flg |= RI_NO_AUTO; ri->ri_depth = 8; /* !! watch out !! */ ri->ri_width = 1280; ri->ri_height = 1024; ri->ri_stride = 2048; ri->ri_bits = base + MX_FB_OFFSET; /* clear the screen */ memset(ri->ri_bits, 0, ri->ri_stride * ri->ri_height); wsfont_init(); /* prefer 12 pixel wide font */ cookie = wsfont_find(NULL, 12, 0, 0, WSDISPLAY_FONTORDER_L2R, WSDISPLAY_FONTORDER_L2R, WSFONT_FIND_BITMAP); if (cookie <= 0) cookie = wsfont_find(NULL, 0, 0, 0, WSDISPLAY_FONTORDER_L2R, WSDISPLAY_FONTORDER_L2R, WSFONT_FIND_BITMAP); if (cookie <= 0) { printf("mfb: font table is empty\n"); return; } if (wsfont_lock(cookie, &ri->ri_font)) { printf("mfb: couldn't lock font\n"); return; } ri->ri_wsfcookie = cookie; rasops_init(ri, 34, 80); /* XXX shouldn't be global */ mfb_stdscreen.nrows = ri->ri_rows; mfb_stdscreen.ncols = ri->ri_cols; mfb_stdscreen.textops = &ri->ri_ops; mfb_stdscreen.capabilities = ri->ri_caps; } static int mfbioctl(void *v, void *vs, u_long cmd, void *data, int flag, struct lwp *l) { struct mfb_softc *sc = v; struct rasops_info *ri = sc->sc_ri; int turnoff, s; switch (cmd) { case WSDISPLAYIO_GTYPE: *(u_int *)data = WSDISPLAY_TYPE_MFB; return (0); case WSDISPLAYIO_GINFO: #define wsd_fbip ((struct wsdisplay_fbinfo *)data) wsd_fbip->height = ri->ri_height; wsd_fbip->width = ri->ri_width; wsd_fbip->depth = ri->ri_depth; wsd_fbip->cmsize = 0; #undef fbt return (0); case WSDISPLAYIO_GETCMAP: case WSDISPLAYIO_PUTCMAP: return (EPASSTHROUGH); case WSDISPLAYIO_SVIDEO: turnoff = *(int *)data == WSDISPLAYIO_VIDEO_OFF; if (sc->sc_blanked != turnoff) { sc->sc_blanked = turnoff; #if 0 /* XXX later XXX */ To turn off, - assign Bt455 cmap[1].green with value 0 (black), - assign Bt431 register #0 with value 0x04 to hide sprite cursor. #endif /* XXX XXX XXX */ } return (0); case WSDISPLAYIO_GVIDEO: *(u_int *)data = sc->sc_blanked ? WSDISPLAYIO_VIDEO_OFF : WSDISPLAYIO_VIDEO_ON; return (0); case WSDISPLAYIO_GCURPOS: *(struct wsdisplay_curpos *)data = sc->sc_cursor.cc_pos; return (0); case WSDISPLAYIO_SCURPOS: s = spltty(); set_curpos(sc, (struct wsdisplay_curpos *)data); sc->sc_changed |= WSDISPLAY_CURSOR_DOPOS; splx(s); return (0); case WSDISPLAYIO_GCURMAX: ((struct wsdisplay_curpos *)data)->x = ((struct wsdisplay_curpos *)data)->y = CURSOR_MAX_SIZE; return (0); case WSDISPLAYIO_GCURSOR: return get_cursor(sc, (struct wsdisplay_cursor *)data); case WSDISPLAYIO_SCURSOR: return set_cursor(sc, (struct wsdisplay_cursor *)data); case WSDISPLAYIO_SMODE: if (*(int *)data == WSDISPLAYIO_MODE_EMUL) { s = spltty(); sc->sc_curenb = 0; sc->sc_blanked = 0; sc->sc_changed |= WSDISPLAY_CURSOR_DOCUR; splx(s); } return (0); } return (EPASSTHROUGH); } static paddr_t mfbmmap(void *v, void *vs, off_t offset, int prot) { struct mfb_softc *sc = v; if (offset >= MX_FB_SIZE || offset < 0) return (-1); return machine_btop(sc->sc_vaddr + MX_FB_OFFSET + offset); } static int mfb_alloc_screen(void *v, const struct wsscreen_descr *type, void **cookiep, int *curxp, int *curyp, long *attrp) { struct mfb_softc *sc = v; struct rasops_info *ri = sc->sc_ri; long defattr; if (sc->nscreens > 0) return (ENOMEM); *cookiep = ri; /* one and only for now */ *curxp = 0; *curyp = 0; (*ri->ri_ops.allocattr)(ri, 0, 0, 0, &defattr); *attrp = defattr; sc->nscreens++; return (0); } static void mfb_free_screen(void *v, void *cookie) { struct mfb_softc *sc = v; if (sc->sc_ri == &mfb_console_ri) panic("mfb_free_screen: console"); sc->nscreens--; } static int mfb_show_screen(void *v, void *cookie, int waitok, void (*cb)(void *, int, int), void *cbarg) { return (0); } /* EXPORT */ int mfb_cnattach(tc_addr_t addr) { struct rasops_info *ri; long defattr; ri = &mfb_console_ri; ri->ri_hw = (void *)addr; mfb_common_init(ri); (*ri->ri_ops.allocattr)(ri, 0, 0, 0, &defattr); wsdisplay_cnattach(&mfb_stdscreen, ri, 0, 0, defattr); mfb_consaddr = addr; return (0); } static int mfbintr(void *arg) { struct mfb_softc *sc = arg; char *base, *vdac, *curs; int v; volatile register int junk; base = (void *)sc->sc_ri->ri_hw; junk = *(uint8_t *)(base + MX_IREQ_OFFSET); __USE(junk); #if 0 *(uint8_t *)(base + MX_IREQ_OFFSET) = 0; #endif if (sc->sc_changed == 0) return (1); vdac = base + MX_BT455_OFFSET; curs = base + MX_BT431_OFFSET; v = sc->sc_changed; if (v & WSDISPLAY_CURSOR_DOCUR) { int onoff; onoff = (sc->sc_curenb) ? 0x4444 : 0x0404; SELECT431(curs, BT431_REG_COMMAND); REGWRITE32(curs, bt_ctl, onoff); } if (v & (WSDISPLAY_CURSOR_DOPOS | WSDISPLAY_CURSOR_DOHOT)) { int x, y; uint32_t twin; x = sc->sc_cursor.cc_pos.x - sc->sc_cursor.cc_hot.x; y = sc->sc_cursor.cc_pos.y - sc->sc_cursor.cc_hot.y; x += sc->sc_cursor.cc_magic.x; y += sc->sc_cursor.cc_magic.y; SELECT431(curs, BT431_REG_CURSOR_X_LOW); REGWRITE32(curs, bt_ctl, TWIN_LO(x)); REGWRITE32(curs, bt_ctl, TWIN_HI(x)); REGWRITE32(curs, bt_ctl, TWIN_LO(y)); REGWRITE32(curs, bt_ctl, TWIN_HI(y)); } if (v & WSDISPLAY_CURSOR_DOCMAP) { uint8_t *cp = sc->sc_cursor.cc_color; SELECT455(vdac, 8); REGWRITE32(vdac, bt_cmap, 0); REGWRITE32(vdac, bt_cmap, cp[1]); REGWRITE32(vdac, bt_cmap, 0); REGWRITE32(vdac, bt_cmap, 0); REGWRITE32(vdac, bt_cmap, cp[1]); REGWRITE32(vdac, bt_cmap, 0); REGWRITE32(vdac, bt_ovly, 0); REGWRITE32(vdac, bt_ovly, cp[0]); REGWRITE32(vdac, bt_ovly, 0); } if (v & WSDISPLAY_CURSOR_DOSHAPE) { uint8_t *ip, *mp, img, msk; int bcnt; ip = (uint8_t *)sc->sc_cursor.cc_image; mp = (uint8_t *)sc->sc_cursor.cc_mask; bcnt = 0; SELECT431(curs, BT431_REG_CRAM_BASE); /* 64 pixel scan line is consisted with 16 byte cursor ram */ while (bcnt < sc->sc_cursor.cc_size.y * 16) { /* pad right half 32 pixel when smaller than 33 */ if ((bcnt & 0x8) && sc->sc_cursor.cc_size.x < 33) { REGWRITE32(curs, bt_ram, 0); } else { int half; img = *ip++; msk = *mp++; img &= msk; /* cookie off image */ half = (flip[msk] << 8) | flip[img]; REGWRITE32(curs, bt_ram, half); } bcnt += 2; } /* pad unoccupied scan lines */ while (bcnt < CURSOR_MAX_SIZE * 16) { REGWRITE32(curs, bt_ram, 0); bcnt += 2; } } sc->sc_changed = 0; return (1); } static void mfbhwinit(void *mfbbase) { char *vdac, *curs; int i; vdac = (char *)mfbbase + MX_BT455_OFFSET; curs = (char *)mfbbase + MX_BT431_OFFSET; SELECT431(curs, BT431_REG_COMMAND); REGWRITE32(curs, bt_ctl, 0x0404); REGWRITE32(curs, bt_ctl, 0); /* XLO */ REGWRITE32(curs, bt_ctl, 0); /* XHI */ REGWRITE32(curs, bt_ctl, 0); /* YLO */ REGWRITE32(curs, bt_ctl, 0); /* YHI */ REGWRITE32(curs, bt_ctl, 0); /* XWLO */ REGWRITE32(curs, bt_ctl, 0); /* XWHI */ REGWRITE32(curs, bt_ctl, 0); /* WYLO */ REGWRITE32(curs, bt_ctl, 0); /* WYLO */ REGWRITE32(curs, bt_ctl, 0); /* WWLO */ REGWRITE32(curs, bt_ctl, 0); /* WWHI */ REGWRITE32(curs, bt_ctl, 0); /* WHLO */ REGWRITE32(curs, bt_ctl, 0); /* WHHI */ /* 0: black, 1: white, 8,9: cursor mask, ovly: cursor image */ SELECT455(vdac, 0); REGWRITE32(vdac, bt_cmap, 0); REGWRITE32(vdac, bt_cmap, 0); REGWRITE32(vdac, bt_cmap, 0); REGWRITE32(vdac, bt_cmap, 0); REGWRITE32(vdac, bt_cmap, 0xff); REGWRITE32(vdac, bt_cmap, 0); for (i = 2; i < 16; i++) { REGWRITE32(vdac, bt_cmap, 0); REGWRITE32(vdac, bt_cmap, 0); REGWRITE32(vdac, bt_cmap, 0); } REGWRITE32(vdac, bt_ovly, 0); REGWRITE32(vdac, bt_ovly, 0xff); REGWRITE32(vdac, bt_ovly, 0); SELECT431(curs, BT431_REG_CRAM_BASE); for (i = 0; i < 512; i++) { REGWRITE32(curs, bt_ram, 0); } } static int set_cursor(struct mfb_softc *sc, struct wsdisplay_cursor *p) { #define cc (&sc->sc_cursor) u_int v, count = 0, icount = 0, index = 0; uint64_t image[CURSOR_MAX_SIZE]; uint64_t mask[CURSOR_MAX_SIZE]; uint8_t color[6]; int error, s; v = p->which; if (v & WSDISPLAY_CURSOR_DOCMAP) { index = p->cmap.index; count = p->cmap.count; if (index >= 2 || count > 2 - index) return (EINVAL); error = copyin(p->cmap.red, &color[index], count); if (error) return error; } if (v & WSDISPLAY_CURSOR_DOSHAPE) { if (p->size.x > CURSOR_MAX_SIZE || p->size.y > CURSOR_MAX_SIZE) return (EINVAL); icount = ((p->size.x < 33) ? 4 : 8) * p->size.y; error = copyin(p->image, image, icount); if (error) return error; error = copyin(p->mask, mask, icount); if (error) return error; } s = spltty(); if (v & WSDISPLAY_CURSOR_DOCUR) sc->sc_curenb = p->enable; if (v & WSDISPLAY_CURSOR_DOPOS) set_curpos(sc, &p->pos); if (v & WSDISPLAY_CURSOR_DOHOT) cc->cc_hot = p->hot; if (v & WSDISPLAY_CURSOR_DOCMAP) memcpy(&cc->cc_color[index], &color[index], count); if (v & WSDISPLAY_CURSOR_DOSHAPE) { cc->cc_size = p->size; memset(cc->cc_image, 0, sizeof cc->cc_image); memcpy(cc->cc_image, image, icount); memset(cc->cc_mask, 0, sizeof cc->cc_mask); memcpy(cc->cc_mask, mask, icount); } sc->sc_changed |= v; splx(s); return (0); #undef cc } static int get_cursor(struct mfb_softc *sc, struct wsdisplay_cursor *p) { return (EPASSTHROUGH); /* XXX */ } static void set_curpos(struct mfb_softc *sc, struct wsdisplay_curpos *curpos) { struct rasops_info *ri = sc->sc_ri; int x = curpos->x, y = curpos->y; if (y < 0) y = 0; else if (y > ri->ri_height) y = ri->ri_height; if (x < 0) x = 0; else if (x > ri->ri_width) x = ri->ri_width; sc->sc_cursor.cc_pos.x = x; sc->sc_cursor.cc_pos.y = y; }