projects / OpenSPARC-T2-SAM / blame
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1 | /* |
| 2 | * ========== Copyright Header Begin ========================================== | |
| 3 | * | |
| 4 | * Hypervisor Software File: prom_heartbeat.c | |
| 5 | * | |
| 6 | * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. | |
| 7 | * | |
| 8 | * - Do no alter or remove copyright notices | |
| 9 | * | |
| 10 | * - Redistribution and use of this software in source and binary forms, with | |
| 11 | * or without modification, are permitted provided that the following | |
| 12 | * conditions are met: | |
| 13 | * | |
| 14 | * - Redistribution of source code must retain the above copyright notice, | |
| 15 | * this list of conditions and the following disclaimer. | |
| 16 | * | |
| 17 | * - Redistribution in binary form must reproduce the above copyright notice, | |
| 18 | * this list of conditions and the following disclaimer in the | |
| 19 | * documentation and/or other materials provided with the distribution. | |
| 20 | * | |
| 21 | * Neither the name of Sun Microsystems, Inc. or the names of contributors | |
| 22 | * may be used to endorse or promote products derived from this software | |
| 23 | * without specific prior written permission. | |
| 24 | * | |
| 25 | * This software is provided "AS IS," without a warranty of any kind. | |
| 26 | * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, | |
| 27 | * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A | |
| 28 | * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN | |
| 29 | * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR | |
| 30 | * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR | |
| 31 | * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN | |
| 32 | * OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR | |
| 33 | * FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE | |
| 34 | * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, | |
| 35 | * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF | |
| 36 | * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. | |
| 37 | * | |
| 38 | * You acknowledge that this software is not designed, licensed or | |
| 39 | * intended for use in the design, construction, operation or maintenance of | |
| 40 | * any nuclear facility. | |
| 41 | * | |
| 42 | * ========== Copyright Header End ============================================ | |
| 43 | */ | |
| 44 | /* | |
| 45 | * Copyright (c) 2000-2003 Sun Microsystems, Inc. | |
| 46 | * All rights reserved. | |
| 47 | * Use is subject to license terms. | |
| 48 | */ | |
| 49 | ||
| 50 | #pragma ident "@(#)prom_heartbeat.c 1.1 00/07/22 SMI" | |
| 51 | ||
| 52 | #include <sys/promif.h> | |
| 53 | #include <sys/promimpl.h> | |
| 54 | ||
| 55 | /* | |
| 56 | * Provide 10 millisecond heartbeat for the PROM. A client that has taken over | |
| 57 | * the trap table and clock interrupts, but is not quite ready to take over the | |
| 58 | * function of polling the input-device for an abort sequence (L1/A or BREAK) | |
| 59 | * may use this function to instruct the PROM to poll the keyboard. If used, | |
| 60 | * this function should be called every 10 milliseconds. | |
| 61 | */ | |
| 62 | int | |
| 63 | prom_heartbeat(int32_t msecs) | |
| 64 | { | |
| 65 | cell_t ci[5]; | |
| 66 | ||
| 67 | ci[0] = p1275_ptr2cell("SUNW,heartbeat"); /* Service name */ | |
| 68 | ci[1] = (cell_t)1; /* #argument cells */ | |
| 69 | ci[2] = (cell_t)1; /* #result cells */ | |
| 70 | ci[3] = p1275_int2cell(msecs); /* Arg1: msecs */ | |
| 71 | ci[4] = (cell_t)0; /* Prime the result */ | |
| 72 | ||
| 73 | (void) p1275_cif_handler(&ci); | |
| 74 | ||
| 75 | return (p1275_cell2int(ci[4])); /* Res1: abort-flag */ | |
| 76 | } |