-kern_return_t copypv(addr64_t src64,
- addr64_t snk64,
- unsigned int size,
- int which)
-{
-
- vm_map_t map;
- kern_return_t ret;
- vm_offset_t source, sink;
- vm_offset_t vaddr;
- vm_offset_t paddr;
- spl_t s;
- unsigned int lop, csize;
- int needtran, bothphys;
- vm_prot_t prot;
- pt_entry_t *ptep;
-
- map = (which & cppvKmap) ? kernel_map : current_map_fast();
-
- source = low32(src64);
- sink = low32(snk64);
-
- if((which & (cppvPsrc | cppvPsnk)) == 0 ) { /* Make sure that only one is virtual */
- panic("copypv: no more than 1 parameter may be virtual\n"); /* Not allowed */
- }
-
- bothphys = 1; /* Assume both are physical */
-
- if(!(which & cppvPsnk)) { /* Is there a virtual page here? */
- vaddr = sink; /* Sink side is virtual */
- bothphys = 0; /* Show both aren't physical */
- prot = VM_PROT_READ | VM_PROT_WRITE; /* Sink always must be read/write */
- } else /* if(!(which & cppvPsrc)) */ { /* Source side is virtual */
- vaddr = source; /* Source side is virtual */
- bothphys = 0; /* Show both aren't physical */
- prot = VM_PROT_READ; /* Virtual source is always read only */
- }
-
- needtran = 1; /* Show we need to map the virtual the first time */
- s = splhigh(); /* Don't bother me */
-
- while(size) {
-
- if(!bothphys && (needtran || !(vaddr & 4095LL))) { /* If first time or we stepped onto a new page, we need to translate */
- needtran = 0;
- while(1) {
- ptep = pmap_mapgetpte(map, vaddr);
- if((0 == ptep) || ((*ptep & INTEL_PTE_VALID) == 0)) {
- splx(s); /* Restore the interrupt level */
- ret = vm_fault(map, vm_map_trunc_page(vaddr), prot, FALSE, THREAD_UNINT, NULL, 0); /* Didn't find it, try to fault it in... */
-
- if(ret != KERN_SUCCESS)return KERN_FAILURE; /* Didn't find any, return no good... */
-
- s = splhigh(); /* Don't bother me */
- continue; /* Go try for the map again... */
-
- }
-
- /* Note that we have to have the destination writable. So, if we already have it, or we are mapping the source,
- we can just leave.
- */
- if((which & cppvPsnk) || (*ptep & INTEL_PTE_WRITE)) break; /* We got it mapped R/W or the source is not virtual, leave... */
- splx(s); /* Restore the interrupt level */
-
- ret = vm_fault(map, vm_map_trunc_page(vaddr), VM_PROT_READ | VM_PROT_WRITE, FALSE, THREAD_UNINT, NULL, 0); /* check for a COW area */
- if (ret != KERN_SUCCESS) return KERN_FAILURE; /* We couldn't get it R/W, leave in disgrace... */
- s = splhigh(); /* Don't bother me */
- }
-
- paddr = pte_to_pa(*ptep) | (vaddr & 4095);
-
- if(which & cppvPsrc) sink = paddr; /* If source is physical, then the sink is virtual */
- else source = paddr; /* Otherwise the source is */
- }
-
- lop = (unsigned int)(4096LL - (sink & 4095LL)); /* Assume sink smallest */
- if(lop > (unsigned int)(4096LL - (source & 4095LL))) lop = (unsigned int)(4096LL - (source & 4095LL)); /* No, source is smaller */
-
- csize = size; /* Assume we can copy it all */
- if(lop < size) csize = lop; /* Nope, we can't do it all */
-
- if(which & cppvFsrc) flush_dcache64((addr64_t)source, csize, 1); /* If requested, flush source before move */
- if(which & cppvFsnk) flush_dcache64((addr64_t)sink, csize, 1); /* If requested, flush sink before move */
-
- bcopy_phys((addr64_t)source, (addr64_t)sink, csize); /* Do a physical copy, virtually */
-
- if(which & cppvFsrc) flush_dcache64((addr64_t)source, csize, 1); /* If requested, flush source after move */
- if(which & cppvFsnk) flush_dcache64((addr64_t)sink, csize, 1); /* If requested, flush sink after move */
-
-
-/*
- * Note that for certain ram disk flavors, we may be copying outside of known memory.
- * Therefore, before we try to mark it modifed, we check if it exists.
- */
-
- if( !(which & cppvNoModSnk)) {
- if (phys_page_exists((ppnum_t)sink >> 12))
- mapping_set_mod((ppnum_t)(sink >> 12)); /* Make sure we know that it is modified */
- }
- if( !(which & cppvNoRefSrc)) {
- if (phys_page_exists((ppnum_t)source >> 12))
- mapping_set_ref((ppnum_t)(source >> 12)); /* Make sure we know that it is modified */
- }
-
-
- size = size - csize; /* Calculate what is left */
- vaddr = vaddr + csize; /* Move to next sink address */
- source = source + csize; /* Bump source to next physical address */
- sink = sink + csize; /* Bump sink to next physical address */
- }
-
- splx(s); /* Open up for interrupts */
-
- return KERN_SUCCESS;
-}
-
-void switch_to_serial_console(void)
-{
-}
projects / apple / xnu.git / blobdiff