1 /* 2 * Copyright 2007, François Revol, revol@free.fr. 3 * Distributed under the terms of the MIT License. 4 * 5 * Copyright 2003-2005, Axel Dörfler, axeld@pinc-software.de. 6 * Distributed under the terms of the MIT License. 7 * 8 * Copyright 2001, Travis Geiselbrecht. All rights reserved. 9 * Distributed under the terms of the NewOS License. 10 */ 11 12 #include <KernelExport.h> 13 14 #include <kernel.h> 15 #include <boot/kernel_args.h> 16 17 #include <vm/vm.h> 18 #include <vm/vm_types.h> 19 #include <vm/VMAddressSpace.h> 20 #include <arch/vm.h> 21 #include <arch_mmu.h> 22 23 24 //#define TRACE_ARCH_VM 25 #ifdef TRACE_ARCH_VM 26 # define TRACE(x) dprintf x 27 #else 28 # define TRACE(x) ; 29 #endif 30 31 #warning M68K: WRITEME 32 33 status_t 34 arch_vm_init(kernel_args *args) 35 { 36 return B_OK; 37 } 38 39 40 status_t 41 arch_vm_init2(kernel_args *args) 42 { 43 // int bats[8]; 44 // int i; 45 46 /**/ 47 #warning M68K: disable TT0 and TT1, set up pmmu 48 49 return B_OK; 50 } 51 52 53 status_t 54 arch_vm_init_post_area(kernel_args *args) 55 { 56 return B_OK; 57 } 58 59 60 status_t 61 arch_vm_init_end(kernel_args *args) 62 { 63 #if 0 64 TRACE(("arch_vm_init_end(): %lu virtual ranges to keep:\n", 65 args->arch_args.num_virtual_ranges_to_keep)); 66 67 for (int i = 0; i < (int)args->arch_args.num_virtual_ranges_to_keep; i++) { 68 addr_range &range = args->arch_args.virtual_ranges_to_keep[i]; 69 70 TRACE((" start: %p, size: 0x%lx\n", (void*)range.start, range.size)); 71 72 // skip ranges outside the kernel address space 73 if (!IS_KERNEL_ADDRESS(range.start)) { 74 TRACE((" no kernel address, skipping...\n")); 75 continue; 76 } 77 78 void *address = (void*)range.start; 79 area_id area = create_area("boot loader reserved area", &address, 80 B_EXACT_ADDRESS, range.size, B_ALREADY_WIRED, 81 B_KERNEL_READ_AREA | B_KERNEL_WRITE_AREA); 82 if (area < 0) { 83 panic("arch_vm_init_end(): Failed to create area for boot loader " 84 "reserved area: %p - %p\n", (void*)range.start, 85 (void*)(range.start + range.size)); 86 } 87 } 88 89 // Throw away any address space mappings we've inherited from the boot 90 // loader and have not yet turned into an area. 91 vm_free_unused_boot_loader_range(0, 0xffffffff - B_PAGE_SIZE + 1); 92 #endif 93 94 #warning M68K: unset TT0 now 95 return B_OK; 96 } 97 98 99 status_t 100 arch_vm_init_post_modules(kernel_args *args) 101 { 102 return B_OK; 103 } 104 105 106 void 107 arch_vm_aspace_swap(struct VMAddressSpace *from, struct VMAddressSpace *to) 108 { 109 // This functions is only invoked when a userland thread is in the process 110 // of dying. It switches to the kernel team and does whatever cleanup is 111 // necessary (in case it is the team's main thread, it will delete the 112 // team). 113 // It is however not necessary to change the page directory. Userland team's 114 // page directories include all kernel mappings as well. Furthermore our 115 // arch specific translation map data objects are ref-counted, so they won't 116 // go away as long as they are still used on any CPU. 117 } 118 119 120 bool 121 arch_vm_supports_protection(uint32 protection) 122 { 123 return true; 124 } 125 126 127 void 128 arch_vm_unset_memory_type(VMArea *area) 129 { 130 } 131 132 133 status_t 134 arch_vm_set_memory_type(VMArea *area, phys_addr_t physicalBase, uint32 type) 135 { 136 if (type == 0) 137 return B_OK; 138 139 return B_ERROR; 140 } 141