projects / OpenSPARC-T2-SAM / blame
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1 | \ ========== Copyright Header Begin ========================================== |
| 2 | \ | |
| 3 | \ Hypervisor Software File: switchcpu.fth | |
| 4 | \ | |
| 5 | \ Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. | |
| 6 | \ | |
| 7 | \ - Do no alter or remove copyright notices | |
| 8 | \ | |
| 9 | \ - Redistribution and use of this software in source and binary forms, with | |
| 10 | \ or without modification, are permitted provided that the following | |
| 11 | \ conditions are met: | |
| 12 | \ | |
| 13 | \ - Redistribution of source code must retain the above copyright notice, | |
| 14 | \ this list of conditions and the following disclaimer. | |
| 15 | \ | |
| 16 | \ - Redistribution in binary form must reproduce the above copyright notice, | |
| 17 | \ this list of conditions and the following disclaimer in the | |
| 18 | \ documentation and/or other materials provided with the distribution. | |
| 19 | \ | |
| 20 | \ Neither the name of Sun Microsystems, Inc. or the names of contributors | |
| 21 | \ may be used to endorse or promote products derived from this software | |
| 22 | \ without specific prior written permission. | |
| 23 | \ | |
| 24 | \ This software is provided "AS IS," without a warranty of any kind. | |
| 25 | \ ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, | |
| 26 | \ INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A | |
| 27 | \ PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN | |
| 28 | \ MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR | |
| 29 | \ ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR | |
| 30 | \ DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN | |
| 31 | \ OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR | |
| 32 | \ FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE | |
| 33 | \ DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, | |
| 34 | \ ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF | |
| 35 | \ SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. | |
| 36 | \ | |
| 37 | \ You acknowledge that this software is not designed, licensed or | |
| 38 | \ intended for use in the design, construction, operation or maintenance of | |
| 39 | \ any nuclear facility. | |
| 40 | \ | |
| 41 | \ ========== Copyright Header End ============================================ | |
| 42 | id: @(#)switchcpu.fth 1.3 07/06/14 | |
| 43 | purpose: | |
| 44 | copyright: Copyright 2007 Sun Microsystems, Inc. All Rights Reserved | |
| 45 | copyright: Use is subject to license terms. | |
| 46 | ||
| 47 | headerless | |
| 48 | ||
| 49 | \ Compare cpu state to given state | |
| 50 | : cpu-status? ( cpu status -- flag ) | |
| 51 | over mid-ok? if ( cpu status ) | |
| 52 | swap >cpu-struct >cpu-status @ = ( flag ) | |
| 53 | else ( cpu status ) | |
| 54 | 2drop false ( false ) | |
| 55 | then ( flag ) | |
| 56 | ; | |
| 57 | ||
| 58 | : cpu-started? ( cpu# -- flag ) CPU-STARTED cpu-status? ; | |
| 59 | : cpu-idled? ( cpu# -- flag ) CPU-PARKED cpu-status? ; | |
| 60 | : idle-cpu ( cpu# -- ) | |
| 61 | dup cpu-started? over mid@ <> and if ( cpu# ) | |
| 62 | xcall-idle-cpu ( fail? ) | |
| 63 | then drop ( ) | |
| 64 | ; | |
| 65 | : resume-cpu ( cpu# -- ) | |
| 66 | dup cpu-idled? over mid@ <> and if ( cpu# ) | |
| 67 | xcall-resume-cpu ( fail? ) | |
| 68 | then drop ( ) | |
| 69 | ; | |
| 70 | ||
| 71 | : idle-other-cpus ( -- ) ['] idle-cpu do-foreach-cpu ; | |
| 72 | : resume-other-cpus ( -- ) ['] resume-cpu do-foreach-cpu ; | |
| 73 | ||
| 74 | code do-release-prom ( who? acf -- ) | |
| 75 | tos ip move \ Move acf to ip | |
| 76 | sp tos pop \ Pop stack | |
| 77 | tos sc2 move \ sc2 has who? | |
| 78 | sp tos pop \ Pop stack | |
| 79 | sc2 sc3 mutex-set prom-lock \ Set prom-lock for who? | |
| 80 | ip %g0 %g0 jmpl nop \ Jump to acf address | |
| 81 | \ Not Reached | |
| 82 | c; | |
| 83 | ||
| 84 | : master-release-prom ( n -- ) | |
| 85 | dup >cpu-struct >cpu-status @ if ( n ) | |
| 86 | \ Set PIL level to 0xF before switching and before entering slave loop | |
| 87 | \ this will disable ALARM interrupt and hence break may not work | |
| 88 | cmn-warn[ | |
| 89 | " Sending a break while in OpenBoot might fail to get to OK prompt!" | |
| 90 | ]cmn-end | |
| 91 | h# f pil! ( n ) | |
| 92 | dup >r 0 0 xcall-slave-enterforth r> xcall-cpu drop ( n ) | |
| 93 | cpu-state >cpu-status @ ( n status ) | |
| 94 | CPU-OBP-WARM = if ( n ) | |
| 95 | ['] slave-bp-loop ( n ) | |
| 96 | else ( n ) | |
| 97 | ['] slave-idle-loop ( n acf ) | |
| 98 | then ( n acf ) | |
| 99 | do-release-prom ( ) | |
| 100 | else ( n ) | |
| 101 | cmn-warn[ " CPU %x is not ready" ]cmn-end ( ) | |
| 102 | then | |
| 103 | ; | |
| 104 | ||
| 105 | headers | |
| 106 | ||
| 107 | : switch-cpu ( cpu# -- ) | |
| 108 | \ Simply return if cpu# is the currently running CPU | |
| 109 | dup mid@ = if drop exit then ( ) | |
| 110 | dup mid-ok? if ( cpu# ) | |
| 111 | dup xcall-get-pc 0= if ( cpu# pc ) | |
| 112 | drop ( cpu# ) | |
| 113 | dup idle-cpu ( cpu# ) | |
| 114 | dup >cpu-struct >cpu-status @ ( cpu# status ) | |
| 115 | CPU-IDLING <> if ( cpu# ) | |
| 116 | d# 5 0 do dup cpu-idled? ?leave d# 100 ms loop | |
| 117 | dup cpu-idled? ( cpu# switch? ) | |
| 118 | else ( cpu# ) | |
| 119 | true ( cpu# true ) | |
| 120 | then ( cpu# switch? ) | |
| 121 | if master-release-prom else drop then ( ) | |
| 122 | then ( ) | |
| 123 | else ( cpu# ) | |
| 124 | cmn-warn[ " CPU %x is not present or is not responding" ]cmn-end | |
| 125 | then ( cpu# ) | |
| 126 | ; | |
| 127 | ||
| 128 | chain: enterforth-chain | |
| 129 | idle-other-cpus | |
| 130 | ; | |
| 131 | ||
| 132 | chain: go-chain | |
| 133 | resume-other-cpus | |
| 134 | ; | |
| 135 |