Return to kdp_misc.s CVS log

Up to [Apple XNU] / XNU / osfmk / kdp / ml / ppc

Annotation of XNU/osfmk/kdp/ml/ppc/kdp_misc.s, 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: #include <debug.h>
                     23: #include <ppc/asm.h>
                     24: #include <ppc/proc_reg.h>
                     25: #include <mach/ppc/vm_param.h>
                     26: #include <assym.s>
                     27: 
                     28: .set kLog2CacheLineSize, 5
                     29: .set kCacheLineSize, 32
                     30:  
                     31: ENTRY(kdp_flush_cache, TAG_NO_FRAME_USED)
                     32:        cmpi    cr0,0,r4,0                      /* is this zero length? */
                     33:        add     r4,r3,r4                        /* calculate last byte + 1 */
                     34:        subi    r4,r4,1                         /* calculate last byte */
                     35: 
                     36:        srwi    r5,r3,kLog2CacheLineSize        /* calc first cache line index */
                     37:        srwi    r4,r4,kLog2CacheLineSize        /* calc last cache line index */
                     38:        beq     cr0, LdataToCodeDone            /* done if zero length */
                     39: 
                     40:        subf    r4,r5,r4                        /* calc diff (# lines minus 1) */
                     41:        addi    r4,r4,1                         /* # of cache lines to flush */
                     42:        slwi    r5,r5,kLog2CacheLineSize        /* calc addr of first cache line */
                     43: 
                     44:        /* flush the data cache lines */
                     45:        mr      r3,r5                           /* starting address for loop */
                     46:        mtctr   r4                                      /* loop count */
                     47: LdataToCodeFlushLoop:
                     48:        dcbf    0, r3                                           /* flush the data cache line */
                     49:        addi    r3,r3,kCacheLineSize            /* advance to next cache line */
                     50:        bdnz    LdataToCodeFlushLoop            /* loop until count is zero */
                     51:        sync                                                            /* wait until RAM is valid */
                     52: 
                     53:        /* invalidate the code cache lines */
                     54:        mr      r3,r5                                           /* starting address for loop */
                     55:        mtctr   r4                                                      /* loop count */
                     56: LdataToCodeInvalidateLoop:
                     57:        icbi    0, r3                                           /* invalidate code cache line */
                     58:        addi    r3,r3,kCacheLineSize            /* advance to next cache line */
                     59:        bdnz    LdataToCodeInvalidateLoop       /* loop until count is zero */
                     60:        sync                                                            /* wait until last icbi completes */
                     61:        isync                                                           /* discard prefetched instructions */
                     62: LdataToCodeDone:
                     63:        blr                                                                     /* return nothing */
                     64: 
                     65: ENTRY(kdp_sync_cache, TAG_NO_FRAME_USED)
                     66:        sync                                    /* data sync */
                     67:        isync                                   /* inst sync */
                     68:        blr                                             /* return nothing */
                     69: 
                     70: ENTRY(kdp_xlate_off, TAG_NO_FRAME_USED)
                     71:        mfmsr   r3
                     72:        rlwinm  r4, r3, 0, MSR_DR_BIT+1, MSR_IR_BIT-1
                     73:        mtmsr   r4
                     74:        isync
                     75:        blr
                     76: 
                     77: ENTRY(kdp_xlate_restore, TAG_NO_FRAME_USED)
                     78:        mtmsr   r3
                     79:        isync
                     80:        blr
                     81: 

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.