#include <ppc/proc_reg.h>
#include <ppc/mem.h>
#include <ppc/pmap.h>
-#include <ppc/pmap_internals.h>
#include <ppc/Firmware.h>
#include <ppc/mappings.h>
#include <ppc/exception.h>
* 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;
+ savearea_comm *savec;
+ vm_offset_t save;
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 */
*/
- 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 */
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 */
}
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 */
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
+ */
+ per_proc_info[0].next_savearea = (vm_offset_t)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.
*/
void save_adjust(void) {
- savearea_comm *sctl, *sctlnext, *freepool, *freepage, *realpage;
+ savearea_comm *sctl, *sctlnext, *freepage;
kern_return_t ret;
+ uint64_t vtopmask;
+ 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 */
}
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 = %08X\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 */
}
}
}
projects / apple / xnu.git / blobdiff