1/*
2 * Copyright (c) 2000-2012 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28/*
29 * @OSF_COPYRIGHT@
30 */
31/*
32 * Mach Operating System
33 * Copyright (c) 1991,1990,1989 Carnegie Mellon University
34 * All Rights Reserved.
35 *
36 * Permission to use, copy, modify and distribute this software and its
37 * documentation is hereby granted, provided that both the copyright
38 * notice and this permission notice appear in all copies of the
39 * software, derivative works or modified versions, and any portions
40 * thereof, and that both notices appear in supporting documentation.
41 *
42 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
43 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
44 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
45 *
46 * Carnegie Mellon requests users of this software to return to
47 *
48 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
49 * School of Computer Science
50 * Carnegie Mellon University
51 * Pittsburgh PA 15213-3890
52 *
53 * any improvements or extensions that they make and grant Carnegie Mellon
54 * the rights to redistribute these changes.
55 */
56
57#include <mach_debug.h>
58#include <mach_ldebug.h>
59
60#include <sys/kdebug.h>
61
62#include <mach/kern_return.h>
63#include <mach/thread_status.h>
64#include <mach/vm_param.h>
65
66#include <kern/counters.h>
67#include <kern/mach_param.h>
68#include <kern/task.h>
69#include <kern/thread.h>
70#include <kern/sched_prim.h>
71#include <kern/misc_protos.h>
72#include <kern/assert.h>
73#include <kern/spl.h>
74#include <ipc/ipc_port.h>
75#include <vm/vm_kern.h>
76#include <vm/vm_map.h>
77#include <vm/pmap.h>
78
79#include <i386/cpu_data.h>
80#include <i386/cpu_number.h>
81#include <i386/thread.h>
82#include <i386/eflags.h>
83#include <i386/proc_reg.h>
84#include <i386/seg.h>
85#include <i386/tss.h>
86#include <i386/user_ldt.h>
87#include <i386/fpu.h>
88#include <i386/misc_protos.h>
89
90/*
91 * pmap_zero_page zeros the specified (machine independent) page.
92 */
93void
94pmap_zero_page(
95 ppnum_t pn)
96{
97 assert(pn != vm_page_fictitious_addr);
98 assert(pn != vm_page_guard_addr);
99 bzero_phys((addr64_t)i386_ptob(pn), PAGE_SIZE);
100}
101
102/*
103 * pmap_zero_part_page
104 * zeros the specified (machine independent) part of a page.
105 */
106void
107pmap_zero_part_page(
108 ppnum_t pn,
109 vm_offset_t offset,
110 vm_size_t len)
111{
112 assert(pn != vm_page_fictitious_addr);
113 assert(pn != vm_page_guard_addr);
114 assert(offset + len <= PAGE_SIZE);
115 bzero_phys((addr64_t)(i386_ptob(pn) + offset), (uint32_t)len);
116}
117
118/*
119 * pmap_copy_page copies the specified (machine independent) pages.
120 */
121void
122pmap_copy_part_page(
123 ppnum_t psrc,
124 vm_offset_t src_offset,
125 ppnum_t pdst,
126 vm_offset_t dst_offset,
127 vm_size_t len)
128{
129 pmap_paddr_t src, dst;
130
131 assert(psrc != vm_page_fictitious_addr);
132 assert(pdst != vm_page_fictitious_addr);
133 assert(psrc != vm_page_guard_addr);
134 assert(pdst != vm_page_guard_addr);
135
136 src = i386_ptob(psrc);
137 dst = i386_ptob(pdst);
138
139 assert((((uintptr_t)dst & PAGE_MASK) + dst_offset + len) <= PAGE_SIZE);
140 assert((((uintptr_t)src & PAGE_MASK) + src_offset + len) <= PAGE_SIZE);
141
142 bcopy_phys((addr64_t)src + (src_offset & INTEL_OFFMASK),
143 (addr64_t)dst + (dst_offset & INTEL_OFFMASK),
144 len);
145}
146
147/*
148 * pmap_copy_part_lpage copies part of a virtually addressed page
149 * to a physically addressed page.
150 */
151void
152pmap_copy_part_lpage(
153 __unused vm_offset_t src,
154 __unused ppnum_t pdst,
155 __unused vm_offset_t dst_offset,
156 __unused vm_size_t len)
157{
158
159 assert(pdst != vm_page_fictitious_addr);
160 assert(pdst != vm_page_guard_addr);
161 assert((dst_offset + len) <= PAGE_SIZE);
162
163}
164
165/*
166 * pmap_copy_part_rpage copies part of a physically addressed page
167 * to a virtually addressed page.
168 */
169void
170pmap_copy_part_rpage(
171 __unused ppnum_t psrc,
172 __unused vm_offset_t src_offset,
173 __unused vm_offset_t dst,
174 __unused vm_size_t len)
175{
176
177 assert(psrc != vm_page_fictitious_addr);
178 assert(psrc != vm_page_guard_addr);
179 assert((src_offset + len) <= PAGE_SIZE);
180
181}
182
183/*
184 * kvtophys(addr)
185 *
186 * Convert a kernel virtual address to a physical address
187 */
188addr64_t
189kvtophys(
190 vm_offset_t addr)
191{
192 pmap_paddr_t pa;
193
194 pa = ((pmap_paddr_t)pmap_find_phys(kernel_pmap, addr)) << INTEL_PGSHIFT;
195 if (pa)
196 pa |= (addr & INTEL_OFFMASK);
197
198 return ((addr64_t)pa);
199}
200
201extern pt_entry_t *debugger_ptep;
202extern vm_map_offset_t debugger_window_kva;
203extern int _bcopy(const void *, void *, vm_size_t);
204extern int _bcopy2(const void *, void *);
205extern int _bcopy4(const void *, void *);
206extern int _bcopy8(const void *, void *);
207
208__private_extern__ int ml_copy_phys(addr64_t src64, addr64_t dst64, vm_size_t bytes) {
209 void *src, *dst;
210 int err = 0;
211
212 mp_disable_preemption();
213#if NCOPY_WINDOWS > 0
214 mapwindow_t *src_map, *dst_map;
215 /* We rely on MTRRs here */
216 src_map = pmap_get_mapwindow((pt_entry_t)(INTEL_PTE_VALID | ((pmap_paddr_t)src64 & PG_FRAME) | INTEL_PTE_REF));
217 dst_map = pmap_get_mapwindow((pt_entry_t)(INTEL_PTE_VALID | INTEL_PTE_RW | ((pmap_paddr_t)dst64 & PG_FRAME) | INTEL_PTE_REF | INTEL_PTE_MOD));
218 src = (void *) ((uintptr_t)src_map->prv_CADDR | ((uint32_t)src64 & INTEL_OFFMASK));
219 dst = (void *) ((uintptr_t)dst_map->prv_CADDR | ((uint32_t)dst64 & INTEL_OFFMASK));
220#elif defined(__x86_64__)
221 addr64_t debug_pa = 0;
222
223 /* If either destination or source are outside the
224 * physical map, establish a physical window onto the target frame.
225 */
226 assert(physmap_enclosed(src64) || physmap_enclosed(dst64));
227
228 if (physmap_enclosed(src64) == FALSE) {
229 src = (void *)(debugger_window_kva | (src64 & INTEL_OFFMASK));
230 dst = PHYSMAP_PTOV(dst64);
231 debug_pa = src64 & PG_FRAME;
232 } else if (physmap_enclosed(dst64) == FALSE) {
233 src = PHYSMAP_PTOV(src64);
234 dst = (void *)(debugger_window_kva | (dst64 & INTEL_OFFMASK));
235 debug_pa = dst64 & PG_FRAME;
236 } else {
237 src = PHYSMAP_PTOV(src64);
238 dst = PHYSMAP_PTOV(dst64);
239 }
240 /* DRK: debugger only routine, we don't bother checking for an
241 * identical mapping.
242 */
243 if (debug_pa) {
244 if (debugger_window_kva == 0)
245 panic("%s: invoked in non-debug mode", __FUNCTION__);
246 /* Establish a cache-inhibited physical window; some platforms
247 * may not cover arbitrary ranges with MTRRs
248 */
249 pmap_store_pte(debugger_ptep, debug_pa | INTEL_PTE_NCACHE | INTEL_PTE_RW | INTEL_PTE_REF| INTEL_PTE_MOD | INTEL_PTE_VALID);
250 flush_tlb_raw();
251#if DEBUG
252 kprintf("Remapping debugger physical window at %p to 0x%llx\n", (void *)debugger_window_kva, debug_pa);
253#endif
254 }
255#endif
256 /* ensure we stay within a page */
257 if (((((uint32_t)src64 & (I386_PGBYTES-1)) + bytes) > I386_PGBYTES) || ((((uint32_t)dst64 & (I386_PGBYTES-1)) + bytes) > I386_PGBYTES) ) {
258 panic("ml_copy_phys spans pages, src: 0x%llx, dst: 0x%llx", src64, dst64);
259 }
260
261 /*
262 * For device register access from the debugger,
263 * 2-byte/16-bit, 4-byte/32-bit and 8-byte/64-bit copies are handled
264 * by assembly routines ensuring the required access widths.
265 * 1-byte and other copies are handled by the regular _bcopy.
266 */
267 switch (bytes) {
268 case 2:
269 err = _bcopy2(src, dst);
270 break;
271 case 4:
272 err = _bcopy4(src, dst);
273 break;
274 case 8:
275 err = _bcopy8(src, dst);
276 break;
277 case 1:
278 default:
279 err = _bcopy(src, dst, bytes);
280 break;
281 }
282
283#if NCOPY_WINDOWS > 0
284 pmap_put_mapwindow(src_map);
285 pmap_put_mapwindow(dst_map);
286#endif
287 mp_enable_preemption();
288
289 return err;
290}
291