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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 | /* $Id: mp.c,v 1.10 1998/03/09 14:04:26 jj Exp $ * mp.c: OpenBoot Prom Multiprocessor support routines. Don't call * these on a UP or else you will halt and catch fire. ;) * * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) */ #include <linux/types.h> #include <linux/kernel.h> #include <linux/sched.h> #include <asm/openprom.h> #include <asm/oplib.h> extern void restore_current(void); /* Start cpu with prom-tree node 'cpunode' using context described * by 'ctable_reg' in context 'ctx' at program counter 'pc'. * * XXX Have to look into what the return values mean. XXX */ int prom_startcpu(int cpunode, struct linux_prom_registers *ctable_reg, int ctx, char *pc) { int ret; unsigned long flags; save_flags(flags); cli(); switch(prom_vers) { case PROM_V0: case PROM_V2: case PROM_AP1000: default: ret = -1; break; case PROM_V3: ret = (*(romvec->v3_cpustart))(cpunode, (int) ctable_reg, ctx, pc); break; }; restore_current(); restore_flags(flags); return ret; } /* Stop CPU with device prom-tree node 'cpunode'. * XXX Again, what does the return value really mean? XXX */ int prom_stopcpu(int cpunode) { int ret; unsigned long flags; save_flags(flags); cli(); switch(prom_vers) { case PROM_V0: case PROM_V2: case PROM_AP1000: default: ret = -1; break; case PROM_V3: ret = (*(romvec->v3_cpustop))(cpunode); break; }; restore_current(); restore_flags(flags); return ret; } /* Make CPU with device prom-tree node 'cpunode' idle. * XXX Return value, anyone? XXX */ int prom_idlecpu(int cpunode) { int ret; unsigned long flags; save_flags(flags); cli(); switch(prom_vers) { case PROM_V0: case PROM_V2: case PROM_AP1000: default: ret = -1; break; case PROM_V3: ret = (*(romvec->v3_cpuidle))(cpunode); break; }; restore_current(); restore_flags(flags); return ret; } /* Resume the execution of CPU with nodeid 'cpunode'. * XXX Come on, somebody has to know... XXX */ int prom_restartcpu(int cpunode) { int ret; unsigned long flags; save_flags(flags); cli(); switch(prom_vers) { case PROM_V0: case PROM_V2: case PROM_AP1000: default: ret = -1; break; case PROM_V3: ret = (*(romvec->v3_cpuresume))(cpunode); break; }; restore_current(); restore_flags(flags); return ret; } |