X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/9bccf70c0258c7cac2dcb80011b2a964d884c552..2d21ac55c334faf3a56e5634905ed6987fc787d4:/osfmk/ppc/savearea.c diff --git a/osfmk/ppc/savearea.c b/osfmk/ppc/savearea.c index 1b59e82cc..a86f6d3cc 100644 --- a/osfmk/ppc/savearea.c +++ b/osfmk/ppc/savearea.c @@ -1,30 +1,35 @@ /* - * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved. * - * @APPLE_LICENSE_HEADER_START@ + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * - * The contents of this file constitute Original Code as defined in and - * are subject to the Apple Public Source License Version 1.1 (the - * "License"). You may not use this file except in compliance with the - * License. Please obtain a copy of the License at - * http://www.apple.com/publicsource and read it before using this file. + * This file contains Original Code and/or Modifications of Original Code + * as defined in and that are subject to the Apple Public Source License + * Version 2.0 (the 'License'). You may not use this file except in + * compliance with the License. The rights granted to you under the License + * may not be used to create, or enable the creation or redistribution of, + * unlawful or unlicensed copies of an Apple operating system, or to + * circumvent, violate, or enable the circumvention or violation of, any + * terms of an Apple operating system software license agreement. * - * This Original Code and all software distributed under the License are - * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER + * Please obtain a copy of the License at + * http://www.opensource.apple.com/apsl/ and read it before using this file. + * + * The Original Code and all software distributed under the License are + * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the - * License for the specific language governing rights and limitations - * under the License. + * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. + * Please see the License for the specific language governing rights and + * limitations under the License. * - * @APPLE_LICENSE_HEADER_END@ + * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * This file is used to maintain the exception save areas * */ -#include #include #include #include @@ -44,7 +49,6 @@ #include #include #include -#include #include #include #include @@ -52,7 +56,6 @@ #include -extern struct Saveanchor saveanchor; /* Aliged savearea anchor */ struct Saveanchor backpocket; /* Emergency saveareas */ unsigned int debsave0 = 0; /* Debug flag */ unsigned int backchain = 0; /* Debug flag */ @@ -123,25 +126,26 @@ unsigned int backchain = 0; /* Debug flag */ * Allocate our initial context save areas. As soon as we do this, * we can take an interrupt. We do the saveareas here, 'cause they're guaranteed * to be at least page aligned. + * + * Note: these initial saveareas are all to be allocated from V=R, less than 4GB + * space. */ -void savearea_init(vm_offset_t *addrx) { +void savearea_init(vm_offset_t addr) { - savearea_comm *savec, *savec2, *saveprev; - vm_offset_t save, save2, addr; - int i; + savearea_comm *savec; + vm_offset_t save; + unsigned int i; saveanchor.savetarget = InitialSaveTarget; /* Initial target value */ saveanchor.saveinuse = 0; /* Number of areas in use */ - saveanchor.savefree = 0; /* Remember the start of the free chain */ + saveanchor.savefree = 0; /* Remember the start of the free chain */ saveanchor.savefreecnt = 0; /* Remember the length */ - saveanchor.savepoolfwd = (unsigned int *)&saveanchor; /* Remember pool forward */ - saveanchor.savepoolbwd = (unsigned int *)&saveanchor; /* Remember pool backward */ - - addr = *addrx; /* Make this easier for ourselves */ + saveanchor.savepoolfwd = (addr64_t)&saveanchor; /* Remember pool forward */ + saveanchor.savepoolbwd = (addr64_t)&saveanchor; /* Remember pool backward */ save = addr; /* Point to the whole block of blocks */ @@ -150,7 +154,7 @@ void savearea_init(vm_offset_t *addrx) { */ - for(i=0; i < 8; i++) { /* Initialize the back pocket saveareas */ + for(i=0; i < BackPocketSaveBloks; i++) { /* Initialize the back pocket saveareas */ savec = (savearea_comm *)save; /* Get the control area for this one */ @@ -158,7 +162,7 @@ void savearea_init(vm_offset_t *addrx) { savec->sac_vrswap = 0; /* V=R, so the translation factor is 0 */ savec->sac_flags = sac_perm; /* Mark it permanent */ savec->sac_flags |= 0x0000EE00; /* Debug eyecatcher */ - save_queue((savearea *)savec); /* Add page to savearea lists */ + save_queue((uint32_t)savec >> 12); /* Add page to savearea lists */ save += PAGE_SIZE; /* Jump up to the next one now */ } @@ -175,8 +179,8 @@ void savearea_init(vm_offset_t *addrx) { saveanchor.savefree = 0; /* Remember the start of the free chain */ saveanchor.savefreecnt = 0; /* Remember the length */ saveanchor.saveadjust = 0; /* Set none needed yet */ - saveanchor.savepoolfwd = (unsigned int *)&saveanchor; /* Remember pool forward */ - saveanchor.savepoolbwd = (unsigned int *)&saveanchor; /* Remember pool backward */ + saveanchor.savepoolfwd = (addr64_t)&saveanchor; /* Remember pool forward */ + saveanchor.savepoolbwd = (addr64_t)&saveanchor; /* Remember pool backward */ for(i=0; i < InitialSaveBloks; i++) { /* Initialize the saveareas */ @@ -186,40 +190,37 @@ void savearea_init(vm_offset_t *addrx) { savec->sac_vrswap = 0; /* V=R, so the translation factor is 0 */ savec->sac_flags = sac_perm; /* Mark it permanent */ savec->sac_flags |= 0x0000EE00; /* Debug eyecatcher */ - save_queue((savearea *)savec); /* Add page to savearea lists */ + save_queue((uint32_t)savec >> 12); /* Add page to savearea lists */ save += PAGE_SIZE; /* Jump up to the next one now */ } - *addrx = save; /* Move the free storage lowwater mark */ - /* * We now have a free list that has our initial number of entries * The local qfret lists is empty. When we call save_get below it will see that * the local list is empty and fill it for us. * - * It is ok to call save_get_phys here because even though if we are translation on, we are still V=R and - * running with BAT registers so no interruptions. Regular interruptions will be off. Using save_get - * would be wrong if the tracing was enabled--it would cause an exception. + * It is ok to call save_get here because all initial saveareas are V=R in less + * than 4GB space, so 32-bit addressing is ok. + * */ - save2 = (vm_offset_t)save_get_phys(); /* This will populate the local list - and get the first one for the system */ - per_proc_info[0].next_savearea = (unsigned int)save2; /* Tell the exception handler about it */ - +/* + * This will populate the local list and get the first one for the system + */ + /* XXX next_savearea should be a void * 4425541 */ + getPerProc()->next_savearea = (unsigned long)(void *)save_get(); + /* * The system is now able to take interruptions */ - - return; - } /* - * Returns a savearea. If the free list needs size adjustment it happens here. + * Obtains a savearea. If the free list needs size adjustment it happens here. * Don't actually allocate the savearea until after the adjustment is done. */ @@ -233,23 +234,22 @@ struct savearea *save_alloc(void) { /* Reserve a save area */ /* - * This routine releases a save area to the free queue. If after that, we have more than our maximum target, - * we start releasing what we can until we hit the normal target. + * This routine releases a save area to the free queue. If after that, + * we have more than our maximum target, we start releasing what we can + * until we hit the normal target. */ +void +save_release(struct savearea *save) +{ + /* Return a savearea to the free list */ + save_ret(save); - -void save_release(struct savearea *save) { /* Release a save area */ - - save_ret(save); /* Return a savearea to the free list */ - - if(saveanchor.saveadjust) save_adjust(); /* Adjust the savearea free list and pool size if needed */ - - return; - + /* Adjust the savearea free list and pool size if needed */ + if(saveanchor.saveadjust) + save_adjust(); } - /* * Adjusts the size of the free list. Can either release or allocate full pages * of kernel memory. This can block. @@ -267,15 +267,16 @@ void save_release(struct savearea *save) { /* Release a save area */ void save_adjust(void) { - savearea_comm *sctl, *sctlnext, *freepool, *freepage, *realpage; + savearea_comm *sctl, *sctlnext, *freepage; kern_return_t ret; + ppnum_t physpage; if(saveanchor.saveadjust < 0) { /* Do we need to adjust down? */ sctl = (savearea_comm *)save_trim_free(); /* Trim list to the need count, return start of trim list */ while(sctl) { /* Release the free pages back to the kernel */ - sctlnext = (savearea_comm *)sctl->save_prev; /* Get next in list */ + sctlnext = CAST_DOWN(savearea_comm *, sctl->save_prev); /* Get next in list */ kmem_free(kernel_map, (vm_offset_t) sctl, PAGE_SIZE); /* Release the page */ sctl = sctlnext; /* Chain onwards */ } @@ -291,15 +292,18 @@ void save_adjust(void) { panic("Whoops... Not a bit of wired memory left for saveareas\n"); } - realpage = (savearea_comm *)pmap_extract(kernel_pmap, (vm_offset_t)freepage); /* Get the physical */ + physpage = pmap_find_phys(kernel_pmap, (vm_offset_t)freepage); /* Find physical page */ + if(!physpage) { /* See if we actually have this mapped*/ + panic("save_adjust: wired page not mapped - va = %p\n", freepage); /* Die */ + } bzero((void *)freepage, PAGE_SIZE); /* Clear it all to zeros */ freepage->sac_alloc = 0; /* Mark all entries taken */ - freepage->sac_vrswap = (unsigned int)freepage ^ (unsigned int)realpage; /* Form mask to convert V to R and vice versa */ + freepage->sac_vrswap = ((uint64_t)physpage << 12) ^ (uint64_t)((uintptr_t)freepage); /* XOR to calculate conversion mask */ freepage->sac_flags |= 0x0000EE00; /* Set debug eyecatcher */ - save_queue((savearea *)realpage); /* Add all saveareas on page to free list */ + save_queue(physpage); /* Add all saveareas on page to free list */ } } } @@ -307,14 +311,14 @@ void save_adjust(void) { /* * Fake up information to make the saveareas look like a zone */ - +void save_fake_zone_info(int *count, vm_size_t *cur_size, vm_size_t *max_size, vm_size_t *elem_size, vm_size_t *alloc_size, int *collectable, int *exhaustable) { *count = saveanchor.saveinuse; *cur_size = (saveanchor.savefreecnt + saveanchor.saveinuse) * (PAGE_SIZE / sac_cnt); *max_size = saveanchor.savemaxcount * (PAGE_SIZE / sac_cnt); - *elem_size = sizeof(savearea); + *elem_size = sizeof(struct savearea); *alloc_size = PAGE_SIZE; *collectable = 1; *exhaustable = 0;