diff options
Diffstat (limited to 'sys/arch/wgrisc/stand/boot')
| -rw-r--r-- | sys/arch/wgrisc/stand/boot/Makefile | 12 | ||||
| -rw-r--r-- | sys/arch/wgrisc/stand/boot/boot.c | 76 | ||||
| -rw-r--r-- | sys/arch/wgrisc/stand/boot/conf.c | 37 | ||||
| -rw-r--r-- | sys/arch/wgrisc/stand/boot/fl.c | 102 | ||||
| -rw-r--r-- | sys/arch/wgrisc/stand/boot/sd.c | 77 | ||||
| -rw-r--r-- | sys/arch/wgrisc/stand/boot/start.S | 186 |
6 files changed, 333 insertions, 157 deletions
diff --git a/sys/arch/wgrisc/stand/boot/Makefile b/sys/arch/wgrisc/stand/boot/Makefile index 9979ff28502..06c3d12b698 100644 --- a/sys/arch/wgrisc/stand/boot/Makefile +++ b/sys/arch/wgrisc/stand/boot/Makefile @@ -1,8 +1,8 @@ -# $OpenBSD: Makefile,v 1.1 1997/05/11 16:17:51 pefo Exp $ +# $OpenBSD: Makefile,v 1.2 1997/07/21 06:58:11 pefo Exp $ PROG=boot SADIR=${.CURDIR}/.. -SRCS=start.S boot.c filesystem.c conf.c sd.c +SRCS=start.S boot.c filesystem.c conf.c sd.c fl.c CFLAGS+=$(SACFLAGS) -I${.CURDIR}/../../../../lib/libsa -I${.CURDIR}/../libsa CFLAGS+=-D__INTERNAL_LIBSA_CREAD @@ -17,13 +17,15 @@ machine-links: @ln -fs ${.CURDIR}/../.. wgrisc @ln -fs ${.CURDIR}/../../include machine -${PROG}: $(OBJS) $(DPADD) +${PROG}: $(OBJS) $(LDADD) $(LD) $(LDFLAGS) -o $(PROG) $(OBJS) $(LDADD) -${PROG}.bin: ${PROG} +${PROG}.bin: ${PROG} cp ${PROG} ${PROG}.tmp strip -s ${PROG}.tmp - dd if=${PROG}.tmp of=${PROG}.bin bs=4096 skip=1 + dd if=${PROG}.tmp of=${PROG}.bin bs=512 skip=8 count=1 + dd if=/dev/zero of=${PROG}.bin bs=512 seek=1 count=1 + dd if=${PROG}.tmp of=${PROG}.bin bs=512 skip=9 seek=2 count=14 rm ${PROG}.tmp .include <bsd.prog.mk> diff --git a/sys/arch/wgrisc/stand/boot/boot.c b/sys/arch/wgrisc/stand/boot/boot.c index 6892d6a6a23..2e7cf0742ff 100644 --- a/sys/arch/wgrisc/stand/boot/boot.c +++ b/sys/arch/wgrisc/stand/boot/boot.c @@ -1,12 +1,8 @@ -/* $NetBSD: boot.c,v 1.6 1995/06/28 10:22:32 jonathan Exp $ */ +/* $OpenBSD: boot.c,v 1.2 1997/07/21 06:58:12 pefo Exp $ */ /* - * Copyright (c) 1992, 1993 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Ralph Campbell. - * + * Copyright (c) 1997 Per Fogelstrom + * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: @@ -17,17 +13,16 @@ * 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. - * 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 product includes software developed under OpenBSD by + * Per Fogelstrom. + * 4. The name of the author may not 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 + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 @@ -35,7 +30,6 @@ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * - * @(#)boot.c 8.1 (Berkeley) 6/10/93 */ #include <sys/param.h> @@ -46,29 +40,24 @@ #include <errno.h> -char line[1024]; void gets __P((char *)); ssize_t read __P((int, void *, size_t)); int close __P((int)); void prom_write __P((int, char *, int)); -int main __P((int, char **)); +void main __P((int, char **)); int loadfile __P((char *)); /* - * This gets arguments from the PROM, calls other routines to open - * and load the program to boot, and then transfers execution to that - * new program. - * Argv[0] should be something like "rz(0,0,0)vmunix" on a DECstation 3100. - * Argv[0,1] should be something like "boot 5/rz0/vmunix" on a DECstation 5000. - * The argument "-a" means vmunix should do an automatic reboot. */ -int +void main(argc, argv) int argc; char **argv; { - char *cp = 0; +static char boot[] = {"Boot:"}; + char *cp = boot; int ask, entry; + char line[1024]; ask = 1; @@ -78,23 +67,22 @@ main(argc, argv) } while(1) { do { - printf("Boot: "); + printf("%s\n", cp); if (ask) { gets(line); cp = line; argv[0] = cp; argc = 1; - } else - printf("%s\n", cp); + } } while(ask && line[0] == '\0'); entry = loadfile(cp); if (entry != -1) { - printf("Starting at 0x%x\n\n", entry); ((void (*)())entry)(argc, argv, 0, 0); } + ask = 1; + cp = boot; } - return(0); } /* @@ -108,9 +96,10 @@ loadfile(fname) Elf32_Ehdr eh; Elf32_Phdr *ph; u_long phsize; + char *errs = 0; if ((fd = oopen(fname, 0)) < 0) { - printf("open(%s) failed: %d\n", fname, errno); + errs="open(%s) err: %d\n"; goto err; } @@ -126,24 +115,19 @@ loadfile(fname) goto serr; } - for(i = 0; i < eh.e_phnum; i++) { - switch (ph[i].p_type) { - case PT_LOAD: - olseek(fd, ph[i].p_offset, 0); - if(oread(fd, (char *)ph[i].p_paddr, ph[i].p_filesz) != ph[i].p_filesz) { + for(i = 0; i < eh.e_phnum; i++, ph++) { + if(ph->p_type == PT_LOAD) { + olseek(fd, ph->p_offset, 0); + if(oread(fd, (char *)ph->p_paddr, ph->p_filesz) != ph->p_filesz) { goto serr; } - break; - default: - break; } } - (void) oclose(fd); return(eh.e_entry); serr: - printf("Read size error\n"); + errs = "rd(%s) sz err\n"; err: - printf("Can't boot '%s'\n", fname); - (void) oclose(fd); + printf(errs, fname, errno); return (-1); } + diff --git a/sys/arch/wgrisc/stand/boot/conf.c b/sys/arch/wgrisc/stand/boot/conf.c index fa2b4cb730c..3c991b8edbe 100644 --- a/sys/arch/wgrisc/stand/boot/conf.c +++ b/sys/arch/wgrisc/stand/boot/conf.c @@ -1,12 +1,8 @@ -/* $NetBSD: conf.c,v 1.5 1995/01/18 06:53:39 mellon Exp $ */ +/* $OpenBSD: conf.c,v 1.2 1997/07/21 06:58:12 pefo Exp $ */ /* - * Copyright (c) 1992, 1993 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Ralph Campbell. - * + * Copyright (c) 1997 Per Fogelstrom + * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: @@ -17,17 +13,16 @@ * 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. - * 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 product includes software developed under OpenBSD by + * Per Fogelstrom. + * 4. The name of the author may not 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 + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 @@ -35,9 +30,7 @@ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * - * @(#)conf.c 8.1 (Berkeley) 6/10/93 */ - #include <stand.h> int errno; @@ -50,10 +43,16 @@ int sdstrategy __P((void *, int, daddr_t, size_t, void *, size_t *)); int sdopen __P((struct open_file *, ...)); int sdclose __P((struct open_file *)); +int flstrategy __P((void *, int, daddr_t, size_t, void *, size_t *)); +int flopen __P((struct open_file *, ...)); +int flclose __P((struct open_file *)); + #define sdioctl noioctl +#define flioctl noioctl struct devsw devsw[] = { { "sd", sdstrategy, sdopen, sdclose, sdioctl }, /*0*/ + { "fl", flstrategy, flopen, flclose, flioctl }, /*1*/ }; int ndevs = (sizeof(devsw)/sizeof(devsw[0])); diff --git a/sys/arch/wgrisc/stand/boot/fl.c b/sys/arch/wgrisc/stand/boot/fl.c new file mode 100644 index 00000000000..02459551ff7 --- /dev/null +++ b/sys/arch/wgrisc/stand/boot/fl.c @@ -0,0 +1,102 @@ +/* $OpenBSD: fl.c,v 1.1 1997/07/21 06:58:13 pefo Exp $ */ + +/* + * Copyright (c) 1997 Per Fogelstrom + * + * 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 under OpenBSD by + * Per Fogelstrom. + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 <stdarg.h> + +#include <stand.h> +#include <sys/param.h> + +int prom_seek __P((int, long, int)); +int disk_read __P((int, char *, int, int)); +int disk_open __P((char *, int)); + +struct fl_softc { + int sc_fd; /* PROM file id */ +}; + +int +flstrategy(devdata, rw, bn, reqcnt, addr, cnt) + void *devdata; + int rw; + daddr_t bn; + u_int reqcnt; + char *addr; + u_int *cnt; /* out: number of bytes transfered */ +{ + struct fl_softc *sc = (struct fl_softc *)devdata; + int s; + long offset; + + offset = bn * DEV_BSIZE; + + s = disk_read(sc->sc_fd, addr, offset, reqcnt); + if (s < 0) + return (-s); + *cnt = s; + return (0); +} + +/* + * We only deal with flash 0 here. We need to be small. + */ +int +flopen(struct open_file *f, ...) +{ + struct fl_softc *sc; + int fd; + static char device[] = "fl(0)"; + + fd = disk_open(device, 0); + if (fd < 0) { + return (ENXIO); + } + + sc = alloc(sizeof(struct fl_softc)); + f->f_devdata = (void *)sc; + + sc->sc_fd = fd; + + return (0); +} + +int +flclose(f) + struct open_file *f; +{ +#ifdef FANCY + free(f->f_devdata, sizeof(struct fl_softc)); + f->f_devdata = (void *)0; +#endif + return (0); +} diff --git a/sys/arch/wgrisc/stand/boot/sd.c b/sys/arch/wgrisc/stand/boot/sd.c index 34f8068e14a..dfc9b51317e 100644 --- a/sys/arch/wgrisc/stand/boot/sd.c +++ b/sys/arch/wgrisc/stand/boot/sd.c @@ -50,8 +50,6 @@ int disk_open __P((char *, int)); struct sd_softc { int sc_fd; /* PROM file id */ - int sc_ctlr; /* controller number */ - int sc_unit; /* disk unit number */ int sc_part; /* disk partition number */ struct disklabel sc_label; /* disk label for this disk */ }; @@ -66,30 +64,16 @@ sdstrategy(devdata, rw, bn, reqcnt, addr, cnt) u_int *cnt; /* out: number of bytes transfered */ { struct sd_softc *sc = (struct sd_softc *)devdata; - int part = sc->sc_part; - struct partition *pp = &sc->sc_label.d_partitions[part]; + struct partition *pp = &sc->sc_label.d_partitions[sc->sc_part]; int s; long offset; - offset = bn * DEV_BSIZE; - - /* - * Partial-block transfers not handled. - */ - if (reqcnt & (DEV_BSIZE - 1)) { - *cnt = 0; - return (EINVAL); - } - - offset += pp->p_offset * DEV_BSIZE; + offset = (pp->p_offset + bn) * DEV_BSIZE; s = disk_read(sc->sc_fd, addr, offset, reqcnt); -#if 0 /* XXX error code not returned yet... */ - if (s <= 0) - return (EIO); -#endif - - *cnt = reqcnt; + if (s < 0) + return (-s); + *cnt = s; return (0); } @@ -100,9 +84,8 @@ sdopen(struct open_file *f, ...) struct sd_softc *sc; struct disklabel *lp; - struct dos_partition dp, *dp2; int i, fd; - char *msg; + char *msg = "rd err"; char buf[DEV_BSIZE]; int cnt; daddr_t labelsector; @@ -128,8 +111,6 @@ sdopen(struct open_file *f, ...) f->f_devdata = (void *)sc; sc->sc_fd = fd; - sc->sc_ctlr = ctlr; - sc->sc_unit = unit; sc->sc_part = part; lp = &sc->sc_label; @@ -137,48 +118,46 @@ sdopen(struct open_file *f, ...) lp->d_secpercyl = 1; lp->d_npartitions = MAXPARTITIONS; lp->d_partitions[part].p_offset = 0; - lp->d_partitions[part].p_size = 0x7fffffff; + lp->d_partitions[part].p_size = 0x7fff0000; + + labelsector = LABELSECTOR; +#ifdef USE_DOSBBSECTOR /* First check for any DOS partition table */ i = sdstrategy(sc, F_READ, (daddr_t)DOSBBSECTOR, DEV_BSIZE, buf, &cnt); - if (i || cnt != DEV_BSIZE) { - printf("sd%d: error reading disk label\n", unit); - goto bad; - } - labelsector = 0; - bcopy(buf + DOSPARTOFF, &dp, NDOSPART * sizeof(dp)); - for (dp2=&dp, i=0; i < NDOSPART; i++, dp2++) { - if (dp2->dp_size && dp2->dp_typ == DOSPTYP_OPENBSD) { - labelsector = dp2->dp_start; - break; + if (!(i || cnt != DEV_BSIZE)) { + struct dos_partition dp, *dp2; + bcopy(buf + DOSPARTOFF, &dp, NDOSPART * sizeof(dp)); + for (dp2=&dp, i=0; i < NDOSPART; i++, dp2++) { + if (dp2->dp_size) { + if((dp2->dp_typ == DOSPTYP_386BSD) || + (dp2->dp_typ == DOSPTYP_OPENBSD)) { + labelsector += dp2->dp_start; + break; + } + } } } - for (dp2=&dp, i=0; i < NDOSPART; i++, dp2++) { - if (dp2->dp_size && dp2->dp_typ == DOSPTYP_386BSD) { - labelsector = dp2->dp_start; - break; - } + else { + goto bad; } +#endif /* try to read disk label and partition table information */ - labelsector += LABELSECTOR; i = sdstrategy(sc, F_READ, (daddr_t)labelsector, DEV_BSIZE, buf, &cnt); if (i || cnt != DEV_BSIZE) { - printf("sd%d: error reading disk label\n", unit); goto bad; } msg = getdisklabel(buf, lp); if (msg) { - printf("sd%d: %s\n", unit, msg); goto bad; } if (part >= lp->d_npartitions || lp->d_partitions[part].p_size == 0) { - bad: -#ifndef SMALL - free(sc, sizeof(struct sd_softc)); -#endif + msg = "no part"; +bad: + printf("sd%d: %s\n", unit, msg); return (ENXIO); } return (0); @@ -188,7 +167,9 @@ int sdclose(f) struct open_file *f; { +#ifdef FANCY free(f->f_devdata, sizeof(struct sd_softc)); f->f_devdata = (void *)0; +#endif return (0); } diff --git a/sys/arch/wgrisc/stand/boot/start.S b/sys/arch/wgrisc/stand/boot/start.S index 70535726c56..a3aa0f0ebb9 100644 --- a/sys/arch/wgrisc/stand/boot/start.S +++ b/sys/arch/wgrisc/stand/boot/start.S @@ -1,4 +1,4 @@ -/* $OpenBSD: start.S,v 1.1 1997/05/11 16:17:54 pefo Exp $ */ +/* $OpenBSD: start.S,v 1.2 1997/07/21 06:58:13 pefo Exp $ */ /* * Copyright (c) 1997 Per Fogelstrom @@ -52,6 +52,11 @@ __start: move s0, a0 # save argc move s1, a1 # save argv + la a0, __start+512 # Merge together from + la a1, __start+1024 # disklabel split. + jal memcpy + li a2, 8192 - 1024 + la a0, edata # clear BSS li a1, 0 la a2, end @@ -61,15 +66,101 @@ __start: move a0, s0 # restore argc jal main # main(argc, argv) move a1, s1 # restore argv +/* MAIN NEVER RETURNS */ - j restart # restart... - nop -/* dummy routine for gcc2 */ -LEAF(__main) +/* dummy routines return 0 */ + .globl getenv + .globl __main +getenv: +__main: + .set noreorder j ra + li v0, 0 + + .globl strcmp +strcmp: + .set noreorder +1: + lbu v0, 0(a0) + lbu v1, 0(a1) + beqz v0, 2f + addu a0, a0, 1 + beq v0, v1, 1b + addu a1, a1, 1 +2: + jr ra + subu v0, v0, v1 + + .globl strlen +strlen: + .set noreorder + li v0, 0 +1: + lbu v1, 0(a0) + addu a0, a0, 1 + bnez v1, 1b + addu v0, v0, 1 + + jr ra + addu v0, v0, -1 + + .globl memset +memset: + .set noreorder + move v0, a0 +1: + beqz a2, 2f + addu a2, a2, -1 + + sb a1, 0(a0) + b 1b + addu a0, a0, 1 +2: + jr ra + nop + + .globl memcpy +memcpy: + .set noreorder + beqz a2, 3f + move v0, a0 + sltu v1, a1, a0 + beqz v1, 1f + li a3, 1 /* Forward copy */ + + li a3, -1 /* Backwrads copy */ + addu a0, a2 + b 2f + addu a1, a2 + +1: + lbu v1, 0(a1) + addu a2, a2, -1 + sb v1, 0(a0) +2: + addu a0, a0, a3 + bnez a2, 1b + addu a1, a1, a3 + +3: + jr ra nop -END(__main) + + .globl twiddle +twiddle: + .set noreorder + la v0, twc+4 + lw a0, -4(v0) + li a1, 7 + addu a0, a0, 2 + sw a0, -4(v0) + and a1, a0, a1 + add a1, a1, v0 + + li a0, 1 /* Stdout */ + b prom_write + li a2, 2 /* * Boot rom entrypoints. @@ -77,54 +168,71 @@ END(__main) #define BOOTVEC 0xbfc00500 /* Address of boot vector table */ -NON_LEAF(getchar, STAND_FRAME_SIZE, ra) - .mask 0x80000000, (STAND_RA_OFFSET - STAND_FRAME_SIZE) - subu sp, sp, STAND_FRAME_SIZE - sw ra, STAND_RA_OFFSET(sp) + .globl getchar +getchar: + .set noreorder + sw ra, 4(sp) move a1, sp li a0, 0 - li a2, 1 jal prom_read + li a2, 1 + lw ra, 4(sp) lbu v0, 0(sp) - lw ra, STAND_RA_OFFSET(sp) - addu sp, sp, STAND_FRAME_SIZE jr ra -END(getchar) + nop + + .globl disk_open +disk_open: + .set noreorder + b __go + li v0, 96 -LEAF(putchar) + .globl disk_read +disk_read: + .set noreorder + b __go + li v0, 100 + + .globl prom_read +prom_read: + .set noreorder + b __go + li v0, 0 + + .globl putchar +putchar: + .set noreorder sb a0, 0(sp) move a1, sp li a0, 1 /* Stdout */ li a2, 1 - b prom_write - -END(putchar) - -LEAF(restart) -END(restart) +/* -- fall through -- */ + .globl prom_write +prom_write: + .set noreorder + b __go + li v0, 4 -LEAF(panic) -END(panic) + .globl printf +printf: + .set noreorder + b __go + li v0, 20 -LEAF(disk_open) - lw v0, BOOTVEC+96 - jr v0 -END(disk_open) + .globl panic +panic: -LEAF(disk_read) - lw v0, BOOTVEC+100 +__go: + .set noreorder + lw v0, BOOTVEC(v0) + nop jr v0 -END(disk_read) + nop + .align 2 + .globl twc +twc: .word 0 +tws: .ascii "\\\b-\b/\b-\b" -LEAF(prom_read) - lw v0, BOOTVEC+0 - jr v0 -END(prom_read) - -LEAF(prom_write) - lw v0, BOOTVEC+4 - jr v0 -END(prom_write) |