/* * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * 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. * * 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, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * @OSF_COPYRIGHT@ * */ #include <debug.h> #include <mach/vm_param.h> #include <vm/vm_kern.h> #include <vm/vm_map.h> #include <vm/vm_page.h> #include <ppc/pmap.h> #include <ppc/io_map_entries.h> #include <ppc/Firmware.h> #include <ppc/mappings.h> #include <ppc/proc_reg.h> extern vm_offset_t virtual_avail; /* * Allocate and map memory for devices that may need to be mapped * outside the usual physical memory. If phys_addr is NULL then * steal the appropriate number of physical pages from the vm * system and map them. * * Note, this will onl */ vm_offset_t io_map(vm_offset_t phys_addr, vm_size_t size, unsigned int flags) { vm_offset_t start; vm_size_t i; unsigned int mflags; vm_page_t m; mflags = mmFlgBlock | mmFlgUseAttr | (flags & VM_MEM_GUARDED) | ((flags & VM_MEM_NOT_CACHEABLE) >> 1); /* Convert to our mapping_make flags */ #if DEBUG assert (kernel_map != VM_MAP_NULL); /* VM must be initialised */ #endif if (phys_addr != 0) { /* If they supplied a physical address, use it */ size = round_page(size + (phys_addr & PAGE_MASK)); /* Make sure we map all of it */ (void) kmem_alloc_pageable(kernel_map, &start, size); /* Get some virtual addresses to use */ (void)mapping_make(kernel_pmap, (addr64_t)start, (ppnum_t)(phys_addr >> 12), mflags, /* Map with requested cache mode */ (size >> 12), VM_PROT_READ|VM_PROT_WRITE); return (start + (phys_addr & PAGE_MASK)); /* Pass back the physical address */ } else { (void) kmem_alloc_pageable(kernel_map, &start, size); /* Get some virtual addresses */ mapping_prealloc(size); /* Make sure there are enough free mappings */ for (i = 0; i < size ; i += PAGE_SIZE) { m = VM_PAGE_NULL; while ((m = vm_page_grab()) == VM_PAGE_NULL) { /* Get a physical page */ VM_PAGE_WAIT(); /* Wait if we didn't have one */ } vm_page_gobble(m); (void)mapping_make(kernel_pmap, (addr64_t)(start + i), m->phys_page, mflags, /* Map with requested cache mode */ 1, VM_PROT_READ|VM_PROT_WRITE); } mapping_relpre(); /* Allow mapping release */ return start; } } /* * Allocate and map memory for devices before the VM system comes alive. */ vm_offset_t io_map_spec(vm_offset_t phys_addr, vm_size_t size, unsigned int flags) { vm_offset_t start; unsigned int mflags; if(kernel_map != VM_MAP_NULL) { /* If VM system is up, redirect to normal routine */ return io_map(phys_addr, size, flags); /* Map the address */ } mflags = mmFlgBlock | mmFlgUseAttr | (flags & VM_MEM_GUARDED) | ((flags & VM_MEM_NOT_CACHEABLE) >> 1); /* Convert to our mapping_make flags */ size = round_page(size + (phys_addr - (phys_addr & -PAGE_SIZE))); /* Extend the length to include it all */ start = pmap_boot_map(size); /* Get me some virtual address */ (void)mapping_make(kernel_pmap, (addr64_t)start, (ppnum_t)(phys_addr >> 12), mflags, /* Map with requested cache mode */ (size >> 12), VM_PROT_READ|VM_PROT_WRITE); return (start + (phys_addr & PAGE_MASK)); }