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Annotation of XNU/osfmk/ppc/interrupt.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
                      3:  *
                      4:  * @APPLE_LICENSE_HEADER_START@
                      5:  * 
                      6:  * The contents of this file constitute Original Code as defined in and
                      7:  * are subject to the Apple Public Source License Version 1.1 (the
                      8:  * "License").  You may not use this file except in compliance with the
                      9:  * License.  Please obtain a copy of the License at
                     10:  * http://www.apple.com/publicsource and read it before using this file.
                     11:  * 
                     12:  * This Original Code and all software distributed under the License are
                     13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
                     14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
                     15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
                     16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
                     17:  * License for the specific language governing rights and limitations
                     18:  * under the License.
                     19:  * 
                     20:  * @APPLE_LICENSE_HEADER_END@
                     21:  */
                     22: /*
                     23:  * @OSF_COPYRIGHT@
                     24:  */
                     25: /*
                     26:  * @APPLE_FREE_COPYRIGHT@
                     27:  */
                     28: #include <kern/misc_protos.h>
                     29: #include <kern/assert.h>
                     30: #include <kern/thread.h>
                     31: #include <kern/counters.h>
                     32: #include <ppc/misc_protos.h>
                     33: #include <ppc/proc_reg.h>
                     34: #include <ppc/exception.h>
                     35: #include <ppc/savearea.h>
                     36: #include <pexpert/pexpert.h>
                     37: #if    NCPUS > 1
                     38: #include <ppc/POWERMAC/mp/MPPlugIn.h>
                     39: #endif /* NCPUS > 1 */
                     40: #include <sys/kdebug.h>
                     41: 
                     42: struct ppc_saved_state * interrupt(
                     43:         int type,
                     44:         struct ppc_saved_state *ssp,
                     45:        unsigned int dsisr,
                     46:        unsigned int dar)
                     47: {
                     48:        int     current_cpu;
                     49: 
                     50:        disable_preemption();
                     51: 
                     52:        switch (type) {
                     53:        case T_DECREMENTER:
                     54:                KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_DECI, 0) | DBG_FUNC_NONE,
                     55:                       isync_mfdec(), ((savearea *)ssp)->save_srr0, 0, 0, 0);
                     56: 
                     57:                if (pcsample_enable)
                     58:                  {
                     59:                    if (find_user_regs(current_act()))
                     60:                      add_pcsamples (user_pc(current_act()));
                     61:                  }
                     62:                rtclock_intr(0,ssp, 0);
                     63:                break;
                     64: 
                     65:        case T_INTERRUPT:
                     66:                /* Call the platform interrupt routine */
                     67:                counter_always(c_incoming_interrupts++);
                     68: 
                     69:                current_cpu = cpu_number();
                     70: 
                     71:                KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_INTR, 0) | DBG_FUNC_START,
                     72:                       current_cpu, ((savearea *)ssp)->save_srr0, 0, 0, 0);
                     73: 
                     74:                per_proc_info[current_cpu].interrupt_handler(
                     75:                        per_proc_info[current_cpu].interrupt_target, 
                     76:                        per_proc_info[current_cpu].interrupt_refCon,
                     77:                        per_proc_info[current_cpu].interrupt_nub, 
                     78:                        per_proc_info[current_cpu].interrupt_source);
                     79: 
                     80:                KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_INTR, 0) | DBG_FUNC_END,
                     81:                       0, 0, 0, 0, 0);
                     82: 
                     83:                break;
                     84: 
                     85:        case T_SIGP:
                     86:                /* Did the other processor signal us? */ 
                     87:                cpu_signal_handler();
                     88:                break;
                     89:                        
                     90:        default:
                     91: #if     MACH_KDP || MACH_KDB
                     92:                (void)Call_Debugger(type, ssp);
                     93: #else
                     94:                panic("Invalid interrupt type %x\n", type);
                     95: #endif
                     96:                break;
                     97:        }
                     98: 
                     99:        enable_preemption();
                    100:        return ssp;
                    101: }

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