/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __M68K_UACCESS_H #define __M68K_UACCESS_H /* * User space memory access functions */ #include <linux/compiler.h> #include <linux/types.h> #include <asm/segment.h> /* We let the MMU do all checking */ static inline int access_ok(int type, const void __user *addr, unsigned long size) { return 1; } /* * Not all varients of the 68k family support the notion of address spaces. * The traditional 680x0 parts do, and they use the sfc/dfc registers and * the "moves" instruction to access user space from kernel space. Other * family members like ColdFire don't support this, and only have a single * address space, and use the usual "move" instruction for user space access. * * Outside of this difference the user space access functions are the same. * So lets keep the code simple and just define in what we need to use. */ #ifdef CONFIG_CPU_HAS_ADDRESS_SPACES #define MOVES "moves" #else #define MOVES "move" #endif extern int __put_user_bad(void); extern int __get_user_bad(void); #define __put_user_asm(res, x, ptr, bwl, reg, err) \ asm volatile ("\n" \ "1: "MOVES"."#bwl" %2,%1\n" \ "2:\n" \ " .section .fixup,\"ax\"\n" \ " .even\n" \ "10: moveq.l %3,%0\n" \ " jra 2b\n" \ " .previous\n" \ "\n" \ " .section __ex_table,\"a\"\n" \ " .align 4\n" \ " .long 1b,10b\n" \ " .long 2b,10b\n" \ " .previous" \ : "+d" (res), "=m" (*(ptr)) \ : #reg (x), "i" (err)) /* * These are the main single-value transfer routines. They automatically * use the right size if we just have the right pointer type. */ #define __put_user(x, ptr) \ ({ \ typeof(*(ptr)) __pu_val = (x); \ int __pu_err = 0; \ __chk_user_ptr(ptr); \ switch (sizeof (*(ptr))) { \ case 1: \ __put_user_asm(__pu_err, __pu_val, ptr, b, d, -EFAULT); \ break; \ case 2: \ __put_user_asm(__pu_err, __pu_val, ptr, w, r, -EFAULT); \ break; \ case 4: \ __put_user_asm(__pu_err, __pu_val, ptr, l, r, -EFAULT); \ break; \ case 8: \ { \ const void __user *__pu_ptr = (ptr); \ asm volatile ("\n" \ "1: "MOVES".l %2,(%1)+\n" \ "2: "MOVES".l %R2,(%1)\n" \ "3:\n" \ " .section .fixup,\"ax\"\n" \ " .even\n" \ "10: movel %3,%0\n" \ " jra 3b\n" \ " .previous\n" \ "\n" \ " .section __ex_table,\"a\"\n" \ " .align 4\n" \ " .long 1b,10b\n" \ " .long 2b,10b\n" \ " .long 3b,10b\n" \ " .previous" \ : "+d" (__pu_err), "+a" (__pu_ptr) \ : "r" (__pu_val), "i" (-EFAULT) \ : "memory"); \ break; \ } \ default: \ __pu_err = __put_user_bad(); \ break; \ } \ __pu_err; \ }) #define put_user(x, ptr) __put_user(x, ptr) #define __get_user_asm(res, x, ptr, type, bwl, reg, err) ({ \ type __gu_val; \ asm volatile ("\n" \ "1: "MOVES"."#bwl" %2,%1\n" \ "2:\n" \ " .section .fixup,\"ax\"\n" \ " .even\n" \ "10: move.l %3,%0\n" \ " sub.l %1,%1\n" \ " jra 2b\n" \ " .previous\n" \ "\n" \ " .section __ex_table,\"a\"\n" \ " .align 4\n" \ " .long 1b,10b\n" \ " .previous" \ : "+d" (res), "=&" #reg (__gu_val) \ : "m" (*(ptr)), "i" (err)); \ (x) = (__force typeof(*(ptr)))(__force unsigned long)__gu_val; \ }) #define __get_user(x, ptr) \ ({ \ int __gu_err = 0; \ __chk_user_ptr(ptr); \ switch (sizeof(*(ptr))) { \ case 1: \ __get_user_asm(__gu_err, x, ptr, u8, b, d, -EFAULT); \ break; \ case 2: \ __get_user_asm(__gu_err, x, ptr, u16, w, r, -EFAULT); \ break; \ case 4: \ __get_user_asm(__gu_err, x, ptr, u32, l, r, -EFAULT); \ break; \ /* case 8: disabled because gcc-4.1 has a broken typeof \ { \ const void *__gu_ptr = (ptr); \ u64 __gu_val; \ asm volatile ("\n" \ "1: "MOVES".l (%2)+,%1\n" \ "2: "MOVES".l (%2),%R1\n" \ "3:\n" \ " .section .fixup,\"ax\"\n" \ " .even\n" \ "10: move.l %3,%0\n" \ " sub.l %1,%1\n" \ " sub.l %R1,%R1\n" \ " jra 3b\n" \ " .previous\n" \ "\n" \ " .section __ex_table,\"a\"\n" \ " .align 4\n" \ " .long 1b,10b\n" \ " .long 2b,10b\n" \ " .previous" \ : "+d" (__gu_err), "=&r" (__gu_val), \ "+a" (__gu_ptr) \ : "i" (-EFAULT) \ : "memory"); \ (x) = (__force typeof(*(ptr)))__gu_val; \ break; \ } */ \ default: \ __gu_err = __get_user_bad(); \ break; \ } \ __gu_err; \ }) #define get_user(x, ptr) __get_user(x, ptr) unsigned long __generic_copy_from_user(void *to, const void __user *from, unsigned long n); unsigned long __generic_copy_to_user(void __user *to, const void *from, unsigned long n); #define __suffix0 #define __suffix1 b #define __suffix2 w #define __suffix4 l #define ____constant_copy_from_user_asm(res, to, from, tmp, n1, n2, n3, s1, s2, s3)\ asm volatile ("\n" \ "1: "MOVES"."#s1" (%2)+,%3\n" \ " move."#s1" %3,(%1)+\n" \ " .ifnc \""#s2"\",\"\"\n" \ "2: "MOVES"."#s2" (%2)+,%3\n" \ " move."#s2" %3,(%1)+\n" \ " .ifnc \""#s3"\",\"\"\n" \ "3: "MOVES"."#s3" (%2)+,%3\n" \ " move."#s3" %3,(%1)+\n" \ " .endif\n" \ " .endif\n" \ "4:\n" \ " .section __ex_table,\"a\"\n" \ " .align 4\n" \ " .long 1b,10f\n" \ " .ifnc \""#s2"\",\"\"\n" \ " .long 2b,20f\n" \ " .ifnc \""#s3"\",\"\"\n" \ " .long 3b,30f\n" \ " .endif\n" \ " .endif\n" \ " .previous\n" \ "\n" \ " .section .fixup,\"ax\"\n" \ " .even\n" \ "10: addq.l #"#n1",%0\n" \ " .ifnc \""#s2"\",\"\"\n" \ "20: addq.l #"#n2",%0\n" \ " .ifnc \""#s3"\",\"\"\n" \ "30: addq.l #"#n3",%0\n" \ " .endif\n" \ " .endif\n" \ " jra 4b\n" \ " .previous\n" \ : "+d" (res), "+&a" (to), "+a" (from), "=&d" (tmp) \ : : "memory") #define ___constant_copy_from_user_asm(res, to, from, tmp, n1, n2, n3, s1, s2, s3)\ ____constant_copy_from_user_asm(res, to, from, tmp, n1, n2, n3, s1, s2, s3) #define __constant_copy_from_user_asm(res, to, from, tmp, n1, n2, n3) \ ___constant_copy_from_user_asm(res, to, from, tmp, n1, n2, n3, \ __suffix##n1, __suffix##n2, __suffix##n3) static __always_inline unsigned long __constant_copy_from_user(void *to, const void __user *from, unsigned long n) { unsigned long res = 0, tmp; switch (n) { case 1: __constant_copy_from_user_asm(res, to, from, tmp, 1, 0, 0); break; case 2: __constant_copy_from_user_asm(res, to, from, tmp, 2, 0, 0); break; case 3: __constant_copy_from_user_asm(res, to, from, tmp, 2, 1, 0); break; case 4: __constant_copy_from_user_asm(res, to, from, tmp, 4, 0, 0); break; case 5: __constant_copy_from_user_asm(res, to, from, tmp, 4, 1, 0); break; case 6: __constant_copy_from_user_asm(res, to, from, tmp, 4, 2, 0); break; case 7: __constant_copy_from_user_asm(res, to, from, tmp, 4, 2, 1); break; case 8: __constant_copy_from_user_asm(res, to, from, tmp, 4, 4, 0); break; case 9: __constant_copy_from_user_asm(res, to, from, tmp, 4, 4, 1); break; case 10: __constant_copy_from_user_asm(res, to, from, tmp, 4, 4, 2); break; case 12: __constant_copy_from_user_asm(res, to, from, tmp, 4, 4, 4); break; default: /* we limit the inlined version to 3 moves */ return __generic_copy_from_user(to, from, n); } return res; } #define __constant_copy_to_user_asm(res, to, from, tmp, n, s1, s2, s3) \ asm volatile ("\n" \ " move."#s1" (%2)+,%3\n" \ "11: "MOVES"."#s1" %3,(%1)+\n" \ "12: move."#s2" (%2)+,%3\n" \ "21: "MOVES"."#s2" %3,(%1)+\n" \ "22:\n" \ " .ifnc \""#s3"\",\"\"\n" \ " move."#s3" (%2)+,%3\n" \ "31: "MOVES"."#s3" %3,(%1)+\n" \ "32:\n" \ " .endif\n" \ "4:\n" \ "\n" \ " .section __ex_table,\"a\"\n" \ " .align 4\n" \ " .long 11b,5f\n" \ " .long 12b,5f\n" \ " .long 21b,5f\n" \ " .long 22b,5f\n" \ " .ifnc \""#s3"\",\"\"\n" \ " .long 31b,5f\n" \ " .long 32b,5f\n" \ " .endif\n" \ " .previous\n" \ "\n" \ " .section .fixup,\"ax\"\n" \ " .even\n" \ "5: moveq.l #"#n",%0\n" \ " jra 4b\n" \ " .previous\n" \ : "+d" (res), "+a" (to), "+a" (from), "=&d" (tmp) \ : : "memory") static __always_inline unsigned long __constant_copy_to_user(void __user *to, const void *from, unsigned long n) { unsigned long res = 0, tmp; switch (n) { case 1: __put_user_asm(res, *(u8 *)from, (u8 __user *)to, b, d, 1); break; case 2: __put_user_asm(res, *(u16 *)from, (u16 __user *)to, w, r, 2); break; case 3: __constant_copy_to_user_asm(res, to, from, tmp, 3, w, b,); break; case 4: __put_user_asm(res, *(u32 *)from, (u32 __user *)to, l, r, 4); break; case 5: __constant_copy_to_user_asm(res, to, from, tmp, 5, l, b,); break; case 6: __constant_copy_to_user_asm(res, to, from, tmp, 6, l, w,); break; case 7: __constant_copy_to_user_asm(res, to, from, tmp, 7, l, w, b); break; case 8: __constant_copy_to_user_asm(res, to, from, tmp, 8, l, l,); break; case 9: __constant_copy_to_user_asm(res, to, from, tmp, 9, l, l, b); break; case 10: __constant_copy_to_user_asm(res, to, from, tmp, 10, l, l, w); break; case 12: __constant_copy_to_user_asm(res, to, from, tmp, 12, l, l, l); break; default: /* limit the inlined version to 3 moves */ return __generic_copy_to_user(to, from, n); } return res; } static inline unsigned long raw_copy_from_user(void *to, const void __user *from, unsigned long n) { if (__builtin_constant_p(n)) return __constant_copy_from_user(to, from, n); return __generic_copy_from_user(to, from, n); } static inline unsigned long raw_copy_to_user(void __user *to, const void *from, unsigned long n) { if (__builtin_constant_p(n)) return __constant_copy_to_user(to, from, n); return __generic_copy_to_user(to, from, n); } #define INLINE_COPY_FROM_USER #define INLINE_COPY_TO_USER #define user_addr_max() \ (uaccess_kernel() ? ~0UL : TASK_SIZE) extern long strncpy_from_user(char *dst, const char __user *src, long count); extern __must_check long strnlen_user(const char __user *str, long n); unsigned long __clear_user(void __user *to, unsigned long n); #define clear_user __clear_user #endif /* _M68K_UACCESS_H */
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Kbuild | File | 599 B | 0644 |
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MC68328.h | File | 37.82 KB | 0644 |
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MC68EZ328.h | File | 37.74 KB | 0644 |
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MC68VZ328.h | File | 41.02 KB | 0644 |
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a.out-core.h | File | 1.98 KB | 0644 |
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adb_iop.h | File | 1.09 KB | 0644 |
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amigahw.h | File | 10.49 KB | 0644 |
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amigaints.h | File | 3.5 KB | 0644 |
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amigayle.h | File | 3.19 KB | 0644 |
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amipcmcia.h | File | 2.51 KB | 0644 |
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apollohw.h | File | 2.35 KB | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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asm-prototypes.h | File | 211 B | 0644 |
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atafd.h | File | 300 B | 0644 |
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atafdreg.h | File | 2.68 KB | 0644 |
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atari_joystick.h | File | 457 B | 0644 |
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atari_stdma.h | File | 514 B | 0644 |
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atari_stram.h | File | 528 B | 0644 |
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atarihw.h | File | 20.3 KB | 0644 |
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atariints.h | File | 5.56 KB | 0644 |
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atarikb.h | File | 1.4 KB | 0644 |
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atomic.h | File | 4.86 KB | 0644 |
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bitops.h | File | 12.19 KB | 0644 |
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blinken.h | File | 641 B | 0644 |
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bootinfo.h | File | 783 B | 0644 |
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bootstd.h | File | 4.64 KB | 0644 |
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bug.h | File | 659 B | 0644 |
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bugs.h | File | 369 B | 0644 |
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bvme6000hw.h | File | 3.45 KB | 0644 |
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cache.h | File | 296 B | 0644 |
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cacheflush.h | File | 133 B | 0644 |
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cacheflush_mm.h | File | 6.92 KB | 0644 |
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cacheflush_no.h | File | 2.61 KB | 0644 |
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checksum.h | File | 3.4 KB | 0644 |
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cmpxchg.h | File | 3.34 KB | 0644 |
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coldfire.h | File | 1.61 KB | 0644 |
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contregs.h | File | 3.31 KB | 0644 |
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current.h | File | 580 B | 0644 |
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delay.h | File | 3.43 KB | 0644 |
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div64.h | File | 858 B | 0644 |
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dma-mapping.h | File | 291 B | 0644 |
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dma.h | File | 16.65 KB | 0644 |
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dsp56k.h | File | 1.24 KB | 0644 |
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dvma.h | File | 9.67 KB | 0644 |
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elf.h | File | 3.07 KB | 0644 |
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entry.h | File | 5.76 KB | 0644 |
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export.h | File | 74 B | 0644 |
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fb.h | File | 921 B | 0644 |
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fbio.h | File | 9.87 KB | 0644 |
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flat.h | File | 1.02 KB | 0644 |
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floppy.h | File | 5.06 KB | 0644 |
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fpu.h | File | 535 B | 0644 |
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ftrace.h | File | 12 B | 0644 |
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gpio.h | File | 2.64 KB | 0644 |
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hardirq.h | File | 594 B | 0644 |
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hash.h | File | 2.07 KB | 0644 |
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hp300hw.h | File | 186 B | 0644 |
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hwtest.h | File | 467 B | 0644 |
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ide.h | File | 1.67 KB | 0644 |
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idprom.h | File | 725 B | 0644 |
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intersil.h | File | 1.11 KB | 0644 |
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io.h | File | 383 B | 0644 |
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io_mm.h | File | 16.19 KB | 0644 |
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io_no.h | File | 5.26 KB | 0644 |
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irq.h | File | 2.57 KB | 0644 |
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irqflags.h | File | 1.61 KB | 0644 |
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kexec.h | File | 732 B | 0644 |
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linkage.h | File | 1.55 KB | 0644 |
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m5206sim.h | File | 6.4 KB | 0644 |
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m520xsim.h | File | 7.15 KB | 0644 |
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m523xsim.h | File | 7.7 KB | 0644 |
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m525xsim.h | File | 10.57 KB | 0644 |
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m5272sim.h | File | 6.05 KB | 0644 |
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m527xsim.h | File | 13.51 KB | 0644 |
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m528xsim.h | File | 9.37 KB | 0644 |
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m52xxacr.h | File | 3.57 KB | 0644 |
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m5307sim.h | File | 7.52 KB | 0644 |
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m53xxacr.h | File | 3.6 KB | 0644 |
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m53xxsim.h | File | 53.97 KB | 0644 |
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m5407sim.h | File | 6.14 KB | 0644 |
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m5441xsim.h | File | 8.5 KB | 0644 |
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m54xxacr.h | File | 4.82 KB | 0644 |
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m54xxgpt.h | File | 3.66 KB | 0644 |
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m54xxpci.h | File | 6.13 KB | 0644 |
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m54xxsim.h | File | 3.8 KB | 0644 |
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mac_asc.h | File | 520 B | 0644 |
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mac_baboon.h | File | 999 B | 0644 |
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mac_iop.h | File | 5.37 KB | 0644 |
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mac_oss.h | File | 1.83 KB | 0644 |
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mac_psc.h | File | 7.25 KB | 0644 |
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mac_via.h | File | 11.44 KB | 0644 |
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machdep.h | File | 1.34 KB | 0644 |
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machines.h | File | 3.13 KB | 0644 |
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machw.h | File | 588 B | 0644 |
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macintosh.h | File | 2.02 KB | 0644 |
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macints.h | File | 3.28 KB | 0644 |
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math-emu.h | File | 6.74 KB | 0644 |
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mc146818rtc.h | File | 598 B | 0644 |
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mcf8390.h | File | 3.75 KB | 0644 |
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mcf_pgalloc.h | File | 2.37 KB | 0644 |
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mcf_pgtable.h | File | 9.89 KB | 0644 |
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mcfclk.h | File | 1.01 KB | 0644 |
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mcfdma.h | File | 6.51 KB | 0644 |
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mcfgpio.h | File | 8.48 KB | 0644 |
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mcfintc.h | File | 3.09 KB | 0644 |
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mcfmmu.h | File | 3.67 KB | 0644 |
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mcfpit.h | File | 2.22 KB | 0644 |
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mcfqspi.h | File | 1.82 KB | 0644 |
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mcfsim.h | File | 1.5 KB | 0644 |
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mcfslt.h | File | 1.21 KB | 0644 |
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mcftimer.h | File | 2.3 KB | 0644 |
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mcfuart.h | File | 6.91 KB | 0644 |
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mcfwdebug.h | File | 4.99 KB | 0644 |
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mmu.h | File | 243 B | 0644 |
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mmu_context.h | File | 7.2 KB | 0644 |
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mmzone.h | File | 264 B | 0644 |
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module.h | File | 847 B | 0644 |
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motorola_pgalloc.h | File | 2.26 KB | 0644 |
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motorola_pgtable.h | File | 9.2 KB | 0644 |
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movs.h | File | 1.44 KB | 0644 |
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mvme147hw.h | File | 2.81 KB | 0644 |
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mvme16xhw.h | File | 2.16 KB | 0644 |
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natfeat.h | File | 533 B | 0644 |
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nettel.h | File | 2.95 KB | 0644 |
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nubus.h | File | 1.21 KB | 0644 |
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openprom.h | File | 7.98 KB | 0644 |
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oplib.h | File | 9.54 KB | 0644 |
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page.h | File | 1.47 KB | 0644 |
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page_mm.h | File | 4.06 KB | 0644 |
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page_no.h | File | 1.28 KB | 0644 |
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page_offset.h | File | 256 B | 0644 |
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parport.h | File | 837 B | 0644 |
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pci.h | File | 458 B | 0644 |
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pgalloc.h | File | 444 B | 0644 |
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pgtable.h | File | 127 B | 0644 |
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pgtable_mm.h | File | 4.84 KB | 0644 |
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pgtable_no.h | File | 1.57 KB | 0644 |
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processor.h | File | 3.59 KB | 0644 |
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ptrace.h | File | 643 B | 0644 |
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q40_master.h | File | 2.28 KB | 0644 |
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q40ints.h | File | 749 B | 0644 |
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quicc_simple.h | File | 1.79 KB | 0644 |
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raw_io.h | File | 11.41 KB | 0644 |
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segment.h | File | 1.42 KB | 0644 |
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serial.h | File | 1.14 KB | 0644 |
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setup.h | File | 9.25 KB | 0644 |
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signal.h | File | 1.34 KB | 0644 |
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smp.h | File | 32 B | 0644 |
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string.h | File | 1.68 KB | 0644 |
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sun3-head.h | File | 353 B | 0644 |
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sun3_pgalloc.h | File | 2.26 KB | 0644 |
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sun3_pgtable.h | File | 7.65 KB | 0644 |
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sun3ints.h | File | 989 B | 0644 |
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sun3mmu.h | File | 4.91 KB | 0644 |
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sun3x.h | File | 868 B | 0644 |
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sun3xflop.h | File | 5.62 KB | 0644 |
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sun3xprom.h | File | 1.31 KB | 0644 |
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switch_to.h | File | 1.51 KB | 0644 |
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thread_info.h | File | 2.02 KB | 0644 |
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timex.h | File | 974 B | 0644 |
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tlb.h | File | 486 B | 0644 |
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tlbflush.h | File | 5.95 KB | 0644 |
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traps.h | File | 8.33 KB | 0644 |
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uaccess.h | File | 152 B | 0644 |
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uaccess_mm.h | File | 10.31 KB | 0644 |
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uaccess_no.h | File | 3.69 KB | 0644 |
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ucontext.h | File | 570 B | 0644 |
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unaligned.h | File | 600 B | 0644 |
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unistd.h | File | 952 B | 0644 |
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user.h | File | 3.78 KB | 0644 |
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vga.h | File | 651 B | 0644 |
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virtconvert.h | File | 947 B | 0644 |
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zorro.h | File | 1.17 KB | 0644 |
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