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authorSam Ravnborg <sam@ravnborg.org>2009-01-16 06:58:10 -0500
committerGreg Ungerer <gerg@uclinux.org>2009-01-16 06:58:10 -0500
commit49148020bcb6910ce71417bd990a5ce7017f9bd3 (patch)
treee410cc433a69075a0254ee4000cb10d71df3a641 /arch/m68k/include/asm/uaccess_mm.h
parentae04d1401577bb63151480a053057de58b8e10bb (diff)
m68k,m68knommu: merge header files
Merge header files for m68k and m68knommu to the single location: arch/m68k/include/asm The majority of this patch was the result of the script that is included in the changelog below. The script was originally written by Arnd Bergman and exten by me to cover a few more files. When the header files differed the script uses the following: The original m68k file is named <file>_mm.h [mm for memory manager] The m68knommu file is named <file>_no.h [no for no memory manager] The files uses the following include guard: This include gaurd works as the m68knommu toolchain set the __uClinux__ symbol - so this should work in userspace too. Merging the header files for m68k and m68knommu exposes the (unexpected?) ABI differences thus it is easier to actually identify these and thus to fix them. The commit has been build tested with both a m68k and a m68knommu toolchain - with success. The commit has also been tested with "make headers_check" and this patch fixes make headers_check for m68knommu. The script used: TARGET=arch/m68k/include/asm SOURCE=arch/m68knommu/include/asm INCLUDE="cachectl.h errno.h fcntl.h hwtest.h ioctls.h ipcbuf.h \ linkage.h math-emu.h md.h mman.h movs.h msgbuf.h openprom.h \ oplib.h poll.h posix_types.h resource.h rtc.h sembuf.h shmbuf.h \ shm.h shmparam.h socket.h sockios.h spinlock.h statfs.h stat.h \ termbits.h termios.h tlb.h types.h user.h" EQUAL="auxvec.h cputime.h device.h emergency-restart.h futex.h \ ioctl.h irq_regs.h kdebug.h local.h mutex.h percpu.h \ sections.h topology.h" NOMUUFILES="anchor.h bootstd.h coldfire.h commproc.h dbg.h \ elia.h flat.h m5206sim.h m520xsim.h m523xsim.h m5249sim.h \ m5272sim.h m527xsim.h m528xsim.h m5307sim.h m532xsim.h \ m5407sim.h m68360_enet.h m68360.h m68360_pram.h m68360_quicc.h \ m68360_regs.h MC68328.h MC68332.h MC68EZ328.h MC68VZ328.h \ mcfcache.h mcfdma.h mcfmbus.h mcfne.h mcfpci.h mcfpit.h \ mcfsim.h mcfsmc.h mcftimer.h mcfuart.h mcfwdebug.h \ nettel.h quicc_simple.h smp.h" FILES="atomic.h bitops.h bootinfo.h bug.h bugs.h byteorder.h cache.h \ cacheflush.h checksum.h current.h delay.h div64.h \ dma-mapping.h dma.h elf.h entry.h fb.h fpu.h hardirq.h hw_irq.h io.h \ irq.h kmap_types.h machdep.h mc146818rtc.h mmu.h mmu_context.h \ module.h page.h page_offset.h param.h pci.h pgalloc.h \ pgtable.h processor.h ptrace.h scatterlist.h segment.h \ setup.h sigcontext.h siginfo.h signal.h string.h system.h swab.h \ thread_info.h timex.h tlbflush.h traps.h uaccess.h ucontext.h \ unaligned.h unistd.h" mergefile() { BASE=${1%.h} git mv ${SOURCE}/$1 ${TARGET}/${BASE}_no.h git mv ${TARGET}/$1 ${TARGET}/${BASE}_mm.h cat << EOF > ${TARGET}/$1 EOF git add ${TARGET}/$1 } set -e mkdir -p ${TARGET} git mv include/asm-m68k/* ${TARGET} rmdir include/asm-m68k git rm ${SOURCE}/Kbuild for F in $INCLUDE $EQUAL; do git rm ${SOURCE}/$F done for F in $NOMUUFILES; do git mv ${SOURCE}/$F ${TARGET}/$F done for F in $FILES ; do mergefile $F done rmdir arch/m68knommu/include/asm rmdir arch/m68knommu/include Cc: Arnd Bergmann <arnd@arndb.de> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Diffstat (limited to 'arch/m68k/include/asm/uaccess_mm.h')
-rw-r--r--arch/m68k/include/asm/uaccess_mm.h374
1 files changed, 374 insertions, 0 deletions
diff --git a/arch/m68k/include/asm/uaccess_mm.h b/arch/m68k/include/asm/uaccess_mm.h
new file mode 100644
index 00000000000..7107f3fbdbb
--- /dev/null
+++ b/arch/m68k/include/asm/uaccess_mm.h
@@ -0,0 +1,374 @@
1#ifndef __M68K_UACCESS_H
2#define __M68K_UACCESS_H
3
4/*
5 * User space memory access functions
6 */
7#include <linux/compiler.h>
8#include <linux/errno.h>
9#include <linux/types.h>
10#include <linux/sched.h>
11#include <asm/segment.h>
12
13#define VERIFY_READ 0
14#define VERIFY_WRITE 1
15
16/* We let the MMU do all checking */
17static inline int access_ok(int type, const void __user *addr,
18 unsigned long size)
19{
20 return 1;
21}
22
23/*
24 * The exception table consists of pairs of addresses: the first is the
25 * address of an instruction that is allowed to fault, and the second is
26 * the address at which the program should continue. No registers are
27 * modified, so it is entirely up to the continuation code to figure out
28 * what to do.
29 *
30 * All the routines below use bits of fixup code that are out of line
31 * with the main instruction path. This means when everything is well,
32 * we don't even have to jump over them. Further, they do not intrude
33 * on our cache or tlb entries.
34 */
35
36struct exception_table_entry
37{
38 unsigned long insn, fixup;
39};
40
41extern int __put_user_bad(void);
42extern int __get_user_bad(void);
43
44#define __put_user_asm(res, x, ptr, bwl, reg, err) \
45asm volatile ("\n" \
46 "1: moves."#bwl" %2,%1\n" \
47 "2:\n" \
48 " .section .fixup,\"ax\"\n" \
49 " .even\n" \
50 "10: moveq.l %3,%0\n" \
51 " jra 2b\n" \
52 " .previous\n" \
53 "\n" \
54 " .section __ex_table,\"a\"\n" \
55 " .align 4\n" \
56 " .long 1b,10b\n" \
57 " .long 2b,10b\n" \
58 " .previous" \
59 : "+d" (res), "=m" (*(ptr)) \
60 : #reg (x), "i" (err))
61
62/*
63 * These are the main single-value transfer routines. They automatically
64 * use the right size if we just have the right pointer type.
65 */
66
67#define __put_user(x, ptr) \
68({ \
69 typeof(*(ptr)) __pu_val = (x); \
70 int __pu_err = 0; \
71 __chk_user_ptr(ptr); \
72 switch (sizeof (*(ptr))) { \
73 case 1: \
74 __put_user_asm(__pu_err, __pu_val, ptr, b, d, -EFAULT); \
75 break; \
76 case 2: \
77 __put_user_asm(__pu_err, __pu_val, ptr, w, d, -EFAULT); \
78 break; \
79 case 4: \
80 __put_user_asm(__pu_err, __pu_val, ptr, l, r, -EFAULT); \
81 break; \
82 case 8: \
83 { \
84 const void __user *__pu_ptr = (ptr); \
85 asm volatile ("\n" \
86 "1: moves.l %2,(%1)+\n" \
87 "2: moves.l %R2,(%1)\n" \
88 "3:\n" \
89 " .section .fixup,\"ax\"\n" \
90 " .even\n" \
91 "10: movel %3,%0\n" \
92 " jra 3b\n" \
93 " .previous\n" \
94 "\n" \
95 " .section __ex_table,\"a\"\n" \
96 " .align 4\n" \
97 " .long 1b,10b\n" \
98 " .long 2b,10b\n" \
99 " .long 3b,10b\n" \
100 " .previous" \
101 : "+d" (__pu_err), "+a" (__pu_ptr) \
102 : "r" (__pu_val), "i" (-EFAULT) \
103 : "memory"); \
104 break; \
105 } \
106 default: \
107 __pu_err = __put_user_bad(); \
108 break; \
109 } \
110 __pu_err; \
111})
112#define put_user(x, ptr) __put_user(x, ptr)
113
114
115#define __get_user_asm(res, x, ptr, type, bwl, reg, err) ({ \
116 type __gu_val; \
117 asm volatile ("\n" \
118 "1: moves."#bwl" %2,%1\n" \
119 "2:\n" \
120 " .section .fixup,\"ax\"\n" \
121 " .even\n" \
122 "10: move.l %3,%0\n" \
123 " sub."#bwl" %1,%1\n" \
124 " jra 2b\n" \
125 " .previous\n" \
126 "\n" \
127 " .section __ex_table,\"a\"\n" \
128 " .align 4\n" \
129 " .long 1b,10b\n" \
130 " .previous" \
131 : "+d" (res), "=&" #reg (__gu_val) \
132 : "m" (*(ptr)), "i" (err)); \
133 (x) = (typeof(*(ptr)))(unsigned long)__gu_val; \
134})
135
136#define __get_user(x, ptr) \
137({ \
138 int __gu_err = 0; \
139 __chk_user_ptr(ptr); \
140 switch (sizeof(*(ptr))) { \
141 case 1: \
142 __get_user_asm(__gu_err, x, ptr, u8, b, d, -EFAULT); \
143 break; \
144 case 2: \
145 __get_user_asm(__gu_err, x, ptr, u16, w, d, -EFAULT); \
146 break; \
147 case 4: \
148 __get_user_asm(__gu_err, x, ptr, u32, l, r, -EFAULT); \
149 break; \
150/* case 8: disabled because gcc-4.1 has a broken typeof \
151 { \
152 const void *__gu_ptr = (ptr); \
153 u64 __gu_val; \
154 asm volatile ("\n" \
155 "1: moves.l (%2)+,%1\n" \
156 "2: moves.l (%2),%R1\n" \
157 "3:\n" \
158 " .section .fixup,\"ax\"\n" \
159 " .even\n" \
160 "10: move.l %3,%0\n" \
161 " sub.l %1,%1\n" \
162 " sub.l %R1,%R1\n" \
163 " jra 3b\n" \
164 " .previous\n" \
165 "\n" \
166 " .section __ex_table,\"a\"\n" \
167 " .align 4\n" \
168 " .long 1b,10b\n" \
169 " .long 2b,10b\n" \
170 " .previous" \
171 : "+d" (__gu_err), "=&r" (__gu_val), \
172 "+a" (__gu_ptr) \
173 : "i" (-EFAULT) \
174 : "memory"); \
175 (x) = (typeof(*(ptr)))__gu_val; \
176 break; \
177 } */ \
178 default: \
179 __gu_err = __get_user_bad(); \
180 break; \
181 } \
182 __gu_err; \
183})
184#define get_user(x, ptr) __get_user(x, ptr)
185
186unsigned long __generic_copy_from_user(void *to, const void __user *from, unsigned long n);
187unsigned long __generic_copy_to_user(void __user *to, const void *from, unsigned long n);
188
189#define __constant_copy_from_user_asm(res, to, from, tmp, n, s1, s2, s3)\
190 asm volatile ("\n" \
191 "1: moves."#s1" (%2)+,%3\n" \
192 " move."#s1" %3,(%1)+\n" \
193 "2: moves."#s2" (%2)+,%3\n" \
194 " move."#s2" %3,(%1)+\n" \
195 " .ifnc \""#s3"\",\"\"\n" \
196 "3: moves."#s3" (%2)+,%3\n" \
197 " move."#s3" %3,(%1)+\n" \
198 " .endif\n" \
199 "4:\n" \
200 " .section __ex_table,\"a\"\n" \
201 " .align 4\n" \
202 " .long 1b,10f\n" \
203 " .long 2b,20f\n" \
204 " .ifnc \""#s3"\",\"\"\n" \
205 " .long 3b,30f\n" \
206 " .endif\n" \
207 " .previous\n" \
208 "\n" \
209 " .section .fixup,\"ax\"\n" \
210 " .even\n" \
211 "10: clr."#s1" (%1)+\n" \
212 "20: clr."#s2" (%1)+\n" \
213 " .ifnc \""#s3"\",\"\"\n" \
214 "30: clr."#s3" (%1)+\n" \
215 " .endif\n" \
216 " moveq.l #"#n",%0\n" \
217 " jra 4b\n" \
218 " .previous\n" \
219 : "+d" (res), "+&a" (to), "+a" (from), "=&d" (tmp) \
220 : : "memory")
221
222static __always_inline unsigned long
223__constant_copy_from_user(void *to, const void __user *from, unsigned long n)
224{
225 unsigned long res = 0, tmp;
226
227 switch (n) {
228 case 1:
229 __get_user_asm(res, *(u8 *)to, (u8 __user *)from, u8, b, d, 1);
230 break;
231 case 2:
232 __get_user_asm(res, *(u16 *)to, (u16 __user *)from, u16, w, d, 2);
233 break;
234 case 3:
235 __constant_copy_from_user_asm(res, to, from, tmp, 3, w, b,);
236 break;
237 case 4:
238 __get_user_asm(res, *(u32 *)to, (u32 __user *)from, u32, l, r, 4);
239 break;
240 case 5:
241 __constant_copy_from_user_asm(res, to, from, tmp, 5, l, b,);
242 break;
243 case 6:
244 __constant_copy_from_user_asm(res, to, from, tmp, 6, l, w,);
245 break;
246 case 7:
247 __constant_copy_from_user_asm(res, to, from, tmp, 7, l, w, b);
248 break;
249 case 8:
250 __constant_copy_from_user_asm(res, to, from, tmp, 8, l, l,);
251 break;
252 case 9:
253 __constant_copy_from_user_asm(res, to, from, tmp, 9, l, l, b);
254 break;
255 case 10:
256 __constant_copy_from_user_asm(res, to, from, tmp, 10, l, l, w);
257 break;
258 case 12:
259 __constant_copy_from_user_asm(res, to, from, tmp, 12, l, l, l);
260 break;
261 default:
262 /* we limit the inlined version to 3 moves */
263 return __generic_copy_from_user(to, from, n);
264 }
265
266 return res;
267}
268
269#define __constant_copy_to_user_asm(res, to, from, tmp, n, s1, s2, s3) \
270 asm volatile ("\n" \
271 " move."#s1" (%2)+,%3\n" \
272 "11: moves."#s1" %3,(%1)+\n" \
273 "12: move."#s2" (%2)+,%3\n" \
274 "21: moves."#s2" %3,(%1)+\n" \
275 "22:\n" \
276 " .ifnc \""#s3"\",\"\"\n" \
277 " move."#s3" (%2)+,%3\n" \
278 "31: moves."#s3" %3,(%1)+\n" \
279 "32:\n" \
280 " .endif\n" \
281 "4:\n" \
282 "\n" \
283 " .section __ex_table,\"a\"\n" \
284 " .align 4\n" \
285 " .long 11b,5f\n" \
286 " .long 12b,5f\n" \
287 " .long 21b,5f\n" \
288 " .long 22b,5f\n" \
289 " .ifnc \""#s3"\",\"\"\n" \
290 " .long 31b,5f\n" \
291 " .long 32b,5f\n" \
292 " .endif\n" \
293 " .previous\n" \
294 "\n" \
295 " .section .fixup,\"ax\"\n" \
296 " .even\n" \
297 "5: moveq.l #"#n",%0\n" \
298 " jra 4b\n" \
299 " .previous\n" \
300 : "+d" (res), "+a" (to), "+a" (from), "=&d" (tmp) \
301 : : "memory")
302
303static __always_inline unsigned long
304__constant_copy_to_user(void __user *to, const void *from, unsigned long n)
305{
306 unsigned long res = 0, tmp;
307
308 switch (n) {
309 case 1:
310 __put_user_asm(res, *(u8 *)from, (u8 __user *)to, b, d, 1);
311 break;
312 case 2:
313 __put_user_asm(res, *(u16 *)from, (u16 __user *)to, w, d, 2);
314 break;
315 case 3:
316 __constant_copy_to_user_asm(res, to, from, tmp, 3, w, b,);
317 break;
318 case 4:
319 __put_user_asm(res, *(u32 *)from, (u32 __user *)to, l, r, 4);
320 break;
321 case 5:
322 __constant_copy_to_user_asm(res, to, from, tmp, 5, l, b,);
323 break;
324 case 6:
325 __constant_copy_to_user_asm(res, to, from, tmp, 6, l, w,);
326 break;
327 case 7:
328 __constant_copy_to_user_asm(res, to, from, tmp, 7, l, w, b);
329 break;
330 case 8:
331 __constant_copy_to_user_asm(res, to, from, tmp, 8, l, l,);
332 break;
333 case 9:
334 __constant_copy_to_user_asm(res, to, from, tmp, 9, l, l, b);
335 break;
336 case 10:
337 __constant_copy_to_user_asm(res, to, from, tmp, 10, l, l, w);
338 break;
339 case 12:
340 __constant_copy_to_user_asm(res, to, from, tmp, 12, l, l, l);
341 break;
342 default:
343 /* limit the inlined version to 3 moves */
344 return __generic_copy_to_user(to, from, n);
345 }
346
347 return res;
348}
349
350#define __copy_from_user(to, from, n) \
351(__builtin_constant_p(n) ? \
352 __constant_copy_from_user(to, from, n) : \
353 __generic_copy_from_user(to, from, n))
354
355#define __copy_to_user(to, from, n) \
356(__builtin_constant_p(n) ? \
357 __constant_copy_to_user(to, from, n) : \
358 __generic_copy_to_user(to, from, n))
359
360#define __copy_to_user_inatomic __copy_to_user
361#define __copy_from_user_inatomic __copy_from_user
362
363#define copy_from_user(to, from, n) __copy_from_user(to, from, n)
364#define copy_to_user(to, from, n) __copy_to_user(to, from, n)
365
366long strncpy_from_user(char *dst, const char __user *src, long count);
367long strnlen_user(const char __user *src, long n);
368unsigned long __clear_user(void __user *to, unsigned long n);
369
370#define clear_user __clear_user
371
372#define strlen_user(str) strnlen_user(str, 32767)
373
374#endif /* _M68K_UACCESS_H */
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