/* $Id: prom.c,v 1.1.1.1 1998/08/21 03:17:42 msmith Exp $ */ /* $NetBSD: prom.c,v 1.3 1997/09/06 14:03:58 drochner Exp $ */ /* * Mach Operating System * Copyright (c) 1992 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. */ #include #include #include #include "common.h" #include "bootstrap.h" int console; static void prom_probe(struct console *cp); static int prom_init(int); void prom_putchar(int); int prom_getchar(void); int prom_poll(void); struct console promconsole = { "prom", "SRM firmware console", 0, prom_probe, prom_init, prom_putchar, prom_getchar, prom_poll, }; void init_prom_calls() { extern struct prom_vec prom_dispatch_v; struct rpb *r; struct crb *c; char buf[4]; r = (struct rpb *)HWRPB_ADDR; c = (struct crb *)((u_int8_t *)r + r->rpb_crb_off); prom_dispatch_v.routine_arg = c->crb_v_dispatch; prom_dispatch_v.routine = c->crb_v_dispatch->entry_va; /* Look for console tty. */ prom_getenv(PROM_E_TTY_DEV, buf, 4); console = buf[0] - '0'; } static void prom_probe(struct console *cp) { init_prom_calls(); cp->c_flags |= C_PRESENTIN|C_PRESENTOUT; } static int prom_init(int arg) { return 0; } void prom_putchar(int c) { prom_return_t ret; char cbuf; cbuf = c; do { ret.bits = prom_dispatch(PROM_R_PUTS, console, &cbuf, 1); } while ((ret.u.retval & 1) == 0); } static int saved_char = -1; int prom_getchar() { prom_return_t ret; if (saved_char != -1) { int c = saved_char; saved_char = -1; return c; } for (;;) { ret.bits = prom_dispatch(PROM_R_GETC, console); if (ret.u.status == 0 || ret.u.status == 1) return (ret.u.retval); } } int prom_poll() { prom_return_t ret; if (saved_char != -1) return 1; ret.bits = prom_dispatch(PROM_R_GETC, console); if (ret.u.status == 0 || ret.u.status == 1) { saved_char = ret.u.retval; return 1; } return 0; } int prom_getenv(id, buf, len) int id, len; char *buf; { prom_return_t ret; ret.bits = prom_dispatch(PROM_R_GETENV, id, buf, len-1); if (ret.u.status & 0x4) ret.u.retval = 0; buf[ret.u.retval] = '\0'; return (ret.u.retval); } int prom_open(dev, len) char *dev; int len; { prom_return_t ret; ret.bits = prom_dispatch(PROM_R_OPEN, dev, len); if (ret.u.status & 0x4) return (-1); else return (ret.u.retval); }