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1276 |
phoenix |
#ifndef _S390_BITOPS_H
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#define _S390_BITOPS_H
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/*
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* include/asm-s390/bitops.h
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*
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* S390 version
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* Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
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* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
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*
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* Derived from "include/asm-i386/bitops.h"
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* Copyright (C) 1992, Linus Torvalds
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*
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*/
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#include <linux/config.h>
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/*
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* bit 0 is the LSB of *addr; bit 31 is the MSB of *addr;
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* bit 32 is the LSB of *(addr+4). That combined with the
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* big endian byte order on S390 give the following bit
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* order in memory:
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* 1f 1e 1d 1c 1b 1a 19 18 17 16 15 14 13 12 11 10 \
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* 0f 0e 0d 0c 0b 0a 09 08 07 06 05 04 03 02 01 00
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* after that follows the next long with bit numbers
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* 3f 3e 3d 3c 3b 3a 39 38 37 36 35 34 33 32 31 30
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* 2f 2e 2d 2c 2b 2a 29 28 27 26 25 24 23 22 21 20
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* The reason for this bit ordering is the fact that
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* in the architecture independent code bits operations
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* of the form "flags |= (1 << bitnr)" are used INTERMIXED
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* with operation of the form "set_bit(bitnr, flags)".
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*/
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/* set ALIGN_CS to 1 if the SMP safe bit operations should
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* align the address to 4 byte boundary. It seems to work
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* without the alignment.
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*/
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#ifdef __KERNEL__
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#define ALIGN_CS 0
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#else
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#define ALIGN_CS 1
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#ifndef CONFIG_SMP
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#error "bitops won't work without CONFIG_SMP"
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#endif
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#endif
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/* bitmap tables from arch/S390/kernel/bitmap.S */
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extern const char _oi_bitmap[];
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extern const char _ni_bitmap[];
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extern const char _zb_findmap[];
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#ifdef CONFIG_SMP
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/*
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* SMP save set_bit routine based on compare and swap (CS)
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*/
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static __inline__ void set_bit_cs(int nr, volatile void * addr)
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{
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unsigned long bits, mask;
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__asm__ __volatile__(
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#if ALIGN_CS == 1
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" lhi %2,3\n" /* CS must be aligned on 4 byte b. */
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" nr %2,%1\n" /* isolate last 2 bits of address */
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" xr %1,%2\n" /* make addr % 4 == 0 */
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" sll %2,3\n"
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" ar %0,%2\n" /* add alignement to bitnr */
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#endif
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" lhi %2,31\n"
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" nr %2,%0\n" /* make shift value */
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" xr %0,%2\n"
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" srl %0,3\n"
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" lhi %3,1\n"
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" la %1,0(%0,%1)\n" /* calc. address for CS */
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" sll %3,0(%2)\n" /* make OR mask */
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" l %0,0(%1)\n"
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"0: lr %2,%0\n" /* CS loop starts here */
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" or %2,%3\n" /* set bit */
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" cs %0,%2,0(%1)\n"
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" jl 0b"
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: "+a" (nr), "+a" (addr), "=&a" (bits), "=&d" (mask) :
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: "cc", "memory" );
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}
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/*
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* SMP save clear_bit routine based on compare and swap (CS)
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*/
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static __inline__ void clear_bit_cs(int nr, volatile void * addr)
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{
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static const int minusone = -1;
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unsigned long bits, mask;
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__asm__ __volatile__(
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#if ALIGN_CS == 1
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" lhi %2,3\n" /* CS must be aligned on 4 byte b. */
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" nr %2,%1\n" /* isolate last 2 bits of address */
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" xr %1,%2\n" /* make addr % 4 == 0 */
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" sll %2,3\n"
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" ar %0,%2\n" /* add alignement to bitnr */
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#endif
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" lhi %2,31\n"
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" nr %2,%0\n" /* make shift value */
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" xr %0,%2\n"
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" srl %0,3\n"
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" lhi %3,1\n"
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" la %1,0(%0,%1)\n" /* calc. address for CS */
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" sll %3,0(%2)\n"
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" x %3,%4\n" /* make AND mask */
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" l %0,0(%1)\n"
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"0: lr %2,%0\n" /* CS loop starts here */
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" nr %2,%3\n" /* clear bit */
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" cs %0,%2,0(%1)\n"
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" jl 0b"
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: "+a" (nr), "+a" (addr), "=&a" (bits), "=&d" (mask)
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: "m" (minusone) : "cc", "memory" );
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}
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/*
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* SMP save change_bit routine based on compare and swap (CS)
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*/
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static __inline__ void change_bit_cs(int nr, volatile void * addr)
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{
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unsigned long bits, mask;
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__asm__ __volatile__(
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#if ALIGN_CS == 1
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" lhi %2,3\n" /* CS must be aligned on 4 byte b. */
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" nr %2,%1\n" /* isolate last 2 bits of address */
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" xr %1,%2\n" /* make addr % 4 == 0 */
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" sll %2,3\n"
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" ar %0,%2\n" /* add alignement to bitnr */
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#endif
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" lhi %2,31\n"
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" nr %2,%0\n" /* make shift value */
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" xr %0,%2\n"
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" srl %0,3\n"
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" lhi %3,1\n"
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" la %1,0(%0,%1)\n" /* calc. address for CS */
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" sll %3,0(%2)\n" /* make XR mask */
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" l %0,0(%1)\n"
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"0: lr %2,%0\n" /* CS loop starts here */
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" xr %2,%3\n" /* change bit */
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" cs %0,%2,0(%1)\n"
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" jl 0b"
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: "+a" (nr), "+a" (addr), "=&a" (bits), "=&d" (mask) :
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: "cc", "memory" );
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}
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/*
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* SMP save test_and_set_bit routine based on compare and swap (CS)
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*/
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static __inline__ int test_and_set_bit_cs(int nr, volatile void * addr)
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{
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unsigned long bits, mask;
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__asm__ __volatile__(
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#if ALIGN_CS == 1
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" lhi %2,3\n" /* CS must be aligned on 4 byte b. */
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" nr %2,%1\n" /* isolate last 2 bits of address */
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" xr %1,%2\n" /* make addr % 4 == 0 */
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" sll %2,3\n"
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| 156 |
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" ar %0,%2\n" /* add alignement to bitnr */
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#endif
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" lhi %2,31\n"
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" nr %2,%0\n" /* make shift value */
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" xr %0,%2\n"
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" srl %0,3\n"
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" lhi %3,1\n"
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" la %1,0(%0,%1)\n" /* calc. address for CS */
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| 164 |
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" sll %3,0(%2)\n" /* make OR mask */
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" l %0,0(%1)\n"
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"0: lr %2,%0\n" /* CS loop starts here */
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" or %2,%3\n" /* set bit */
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" cs %0,%2,0(%1)\n"
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" jl 0b\n"
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" nr %0,%3\n" /* isolate old bit */
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: "+a" (nr), "+a" (addr), "=&a" (bits), "=&d" (mask) :
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: "cc", "memory" );
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return nr != 0;
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}
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/*
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* SMP save test_and_clear_bit routine based on compare and swap (CS)
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*/
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static __inline__ int test_and_clear_bit_cs(int nr, volatile void * addr)
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{
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| 181 |
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static const int minusone = -1;
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| 182 |
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unsigned long bits, mask;
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__asm__ __volatile__(
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| 184 |
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#if ALIGN_CS == 1
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| 185 |
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" lhi %2,3\n" /* CS must be aligned on 4 byte b. */
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| 186 |
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" nr %2,%1\n" /* isolate last 2 bits of address */
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| 187 |
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" xr %1,%2\n" /* make addr % 4 == 0 */
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| 188 |
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" sll %2,3\n"
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| 189 |
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" ar %0,%2\n" /* add alignement to bitnr */
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| 190 |
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#endif
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| 191 |
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" lhi %2,31\n"
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| 192 |
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" nr %2,%0\n" /* make shift value */
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| 193 |
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" xr %0,%2\n"
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| 194 |
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" srl %0,3\n"
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| 195 |
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" lhi %3,1\n"
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| 196 |
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" la %1,0(%0,%1)\n" /* calc. address for CS */
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| 197 |
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" sll %3,0(%2)\n"
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| 198 |
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" l %0,0(%1)\n"
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| 199 |
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" x %3,%4\n" /* make AND mask */
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| 200 |
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"0: lr %2,%0\n" /* CS loop starts here */
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| 201 |
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" nr %2,%3\n" /* clear bit */
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| 202 |
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" cs %0,%2,0(%1)\n"
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| 203 |
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" jl 0b\n"
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| 204 |
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" x %3,%4\n"
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| 205 |
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" nr %0,%3\n" /* isolate old bit */
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| 206 |
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: "+a" (nr), "+a" (addr), "=&a" (bits), "=&d" (mask)
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| 207 |
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: "m" (minusone) : "cc", "memory" );
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| 208 |
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return nr;
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| 209 |
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}
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| 210 |
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|
| 211 |
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/*
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| 212 |
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* SMP save test_and_change_bit routine based on compare and swap (CS)
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| 213 |
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*/
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| 214 |
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static __inline__ int test_and_change_bit_cs(int nr, volatile void * addr)
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| 215 |
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{
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| 216 |
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unsigned long bits, mask;
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| 217 |
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__asm__ __volatile__(
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| 218 |
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#if ALIGN_CS == 1
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| 219 |
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" lhi %2,3\n" /* CS must be aligned on 4 byte b. */
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| 220 |
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" nr %2,%1\n" /* isolate last 2 bits of address */
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| 221 |
|
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" xr %1,%2\n" /* make addr % 4 == 0 */
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| 222 |
|
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" sll %2,3\n"
|
| 223 |
|
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" ar %0,%2\n" /* add alignement to bitnr */
|
| 224 |
|
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#endif
|
| 225 |
|
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" lhi %2,31\n"
|
| 226 |
|
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" nr %2,%0\n" /* make shift value */
|
| 227 |
|
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" xr %0,%2\n"
|
| 228 |
|
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" srl %0,3\n"
|
| 229 |
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" lhi %3,1\n"
|
| 230 |
|
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" la %1,0(%0,%1)\n" /* calc. address for CS */
|
| 231 |
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" sll %3,0(%2)\n" /* make OR mask */
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| 232 |
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" l %0,0(%1)\n"
|
| 233 |
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"0: lr %2,%0\n" /* CS loop starts here */
|
| 234 |
|
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" xr %2,%3\n" /* change bit */
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| 235 |
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" cs %0,%2,0(%1)\n"
|
| 236 |
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" jl 0b\n"
|
| 237 |
|
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" nr %0,%3\n" /* isolate old bit */
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| 238 |
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: "+a" (nr), "+a" (addr), "=&a" (bits), "=&d" (mask) :
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| 239 |
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: "cc", "memory" );
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| 240 |
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return nr != 0;
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| 241 |
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}
|
| 242 |
|
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#endif /* CONFIG_SMP */
|
| 243 |
|
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|
| 244 |
|
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/*
|
| 245 |
|
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* fast, non-SMP set_bit routine
|
| 246 |
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*/
|
| 247 |
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static __inline__ void __set_bit(int nr, volatile void * addr)
|
| 248 |
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{
|
| 249 |
|
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unsigned long reg1, reg2;
|
| 250 |
|
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__asm__ __volatile__(
|
| 251 |
|
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" lhi %1,24\n"
|
| 252 |
|
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" lhi %0,7\n"
|
| 253 |
|
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" xr %1,%2\n"
|
| 254 |
|
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" nr %0,%2\n"
|
| 255 |
|
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" srl %1,3\n"
|
| 256 |
|
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" la %1,0(%1,%3)\n"
|
| 257 |
|
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" la %0,0(%0,%4)\n"
|
| 258 |
|
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" oc 0(1,%1),0(%0)"
|
| 259 |
|
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: "=&a" (reg1), "=&a" (reg2)
|
| 260 |
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: "r" (nr), "a" (addr), "a" (&_oi_bitmap) : "cc", "memory" );
|
| 261 |
|
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}
|
| 262 |
|
|
|
| 263 |
|
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static __inline__ void
|
| 264 |
|
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__constant_set_bit(const int nr, volatile void * addr)
|
| 265 |
|
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{
|
| 266 |
|
|
switch (nr&7) {
|
| 267 |
|
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case 0:
|
| 268 |
|
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__asm__ __volatile__ ("la 1,%0\n\t"
|
| 269 |
|
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"oi 0(1),0x01"
|
| 270 |
|
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: "=m" (*((volatile char *) addr + ((nr>>3)^3)))
|
| 271 |
|
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: : "1", "cc", "memory");
|
| 272 |
|
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break;
|
| 273 |
|
|
case 1:
|
| 274 |
|
|
__asm__ __volatile__ ("la 1,%0\n\t"
|
| 275 |
|
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"oi 0(1),0x02"
|
| 276 |
|
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: "=m" (*((volatile char *) addr + ((nr>>3)^3)))
|
| 277 |
|
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: : "1", "cc", "memory" );
|
| 278 |
|
|
break;
|
| 279 |
|
|
case 2:
|
| 280 |
|
|
__asm__ __volatile__ ("la 1,%0\n\t"
|
| 281 |
|
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"oi 0(1),0x04"
|
| 282 |
|
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: "=m" (*((volatile char *) addr + ((nr>>3)^3)))
|
| 283 |
|
|
: : "1", "cc", "memory" );
|
| 284 |
|
|
break;
|
| 285 |
|
|
case 3:
|
| 286 |
|
|
__asm__ __volatile__ ("la 1,%0\n\t"
|
| 287 |
|
|
"oi 0(1),0x08"
|
| 288 |
|
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: "=m" (*((volatile char *) addr + ((nr>>3)^3)))
|
| 289 |
|
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: : "1", "cc", "memory" );
|
| 290 |
|
|
break;
|
| 291 |
|
|
case 4:
|
| 292 |
|
|
__asm__ __volatile__ ("la 1,%0\n\t"
|
| 293 |
|
|
"oi 0(1),0x10"
|
| 294 |
|
|
: "=m" (*((volatile char *) addr + ((nr>>3)^3)))
|
| 295 |
|
|
: : "1", "cc", "memory" );
|
| 296 |
|
|
break;
|
| 297 |
|
|
case 5:
|
| 298 |
|
|
__asm__ __volatile__ ("la 1,%0\n\t"
|
| 299 |
|
|
"oi 0(1),0x20"
|
| 300 |
|
|
: "=m" (*((volatile char *) addr + ((nr>>3)^3)))
|
| 301 |
|
|
: : "1", "cc", "memory" );
|
| 302 |
|
|
break;
|
| 303 |
|
|
case 6:
|
| 304 |
|
|
__asm__ __volatile__ ("la 1,%0\n\t"
|
| 305 |
|
|
"oi 0(1),0x40"
|
| 306 |
|
|
: "=m" (*((volatile char *) addr + ((nr>>3)^3)))
|
| 307 |
|
|
: : "1", "cc", "memory" );
|
| 308 |
|
|
break;
|
| 309 |
|
|
case 7:
|
| 310 |
|
|
__asm__ __volatile__ ("la 1,%0\n\t"
|
| 311 |
|
|
"oi 0(1),0x80"
|
| 312 |
|
|
: "=m" (*((volatile char *) addr + ((nr>>3)^3)))
|
| 313 |
|
|
: : "1", "cc", "memory" );
|
| 314 |
|
|
break;
|
| 315 |
|
|
}
|
| 316 |
|
|
}
|
| 317 |
|
|
|
| 318 |
|
|
#define set_bit_simple(nr,addr) \
|
| 319 |
|
|
(__builtin_constant_p((nr)) ? \
|
| 320 |
|
|
__constant_set_bit((nr),(addr)) : \
|
| 321 |
|
|
__set_bit((nr),(addr)) )
|
| 322 |
|
|
|
| 323 |
|
|
/*
|
| 324 |
|
|
* fast, non-SMP clear_bit routine
|
| 325 |
|
|
*/
|
| 326 |
|
|
static __inline__ void
|
| 327 |
|
|
__clear_bit(int nr, volatile void * addr)
|
| 328 |
|
|
{
|
| 329 |
|
|
unsigned long reg1, reg2;
|
| 330 |
|
|
__asm__ __volatile__(
|
| 331 |
|
|
" lhi %1,24\n"
|
| 332 |
|
|
" lhi %0,7\n"
|
| 333 |
|
|
" xr %1,%2\n"
|
| 334 |
|
|
" nr %0,%2\n"
|
| 335 |
|
|
" srl %1,3\n"
|
| 336 |
|
|
" la %1,0(%1,%3)\n"
|
| 337 |
|
|
" la %0,0(%0,%4)\n"
|
| 338 |
|
|
" nc 0(1,%1),0(%0)"
|
| 339 |
|
|
: "=&a" (reg1), "=&a" (reg2)
|
| 340 |
|
|
: "r" (nr), "a" (addr), "a" (&_ni_bitmap) : "cc", "memory" );
|
| 341 |
|
|
}
|
| 342 |
|
|
|
| 343 |
|
|
static __inline__ void
|
| 344 |
|
|
__constant_clear_bit(const int nr, volatile void * addr)
|
| 345 |
|
|
{
|
| 346 |
|
|
switch (nr&7) {
|
| 347 |
|
|
case 0:
|
| 348 |
|
|
__asm__ __volatile__ ("la 1,%0\n\t"
|
| 349 |
|
|
"ni 0(1),0xFE"
|
| 350 |
|
|
: "=m" (*((volatile char *) addr + ((nr>>3)^3)))
|
| 351 |
|
|
: : "1", "cc", "memory" );
|
| 352 |
|
|
break;
|
| 353 |
|
|
case 1:
|
| 354 |
|
|
__asm__ __volatile__ ("la 1,%0\n\t"
|
| 355 |
|
|
"ni 0(1),0xFD"
|
| 356 |
|
|
: "=m" (*((volatile char *) addr + ((nr>>3)^3)))
|
| 357 |
|
|
: : "1", "cc", "memory" );
|
| 358 |
|
|
break;
|
| 359 |
|
|
case 2:
|
| 360 |
|
|
__asm__ __volatile__ ("la 1,%0\n\t"
|
| 361 |
|
|
"ni 0(1),0xFB"
|
| 362 |
|
|
: "=m" (*((volatile char *) addr + ((nr>>3)^3)))
|
| 363 |
|
|
: : "1", "cc", "memory" );
|
| 364 |
|
|
break;
|
| 365 |
|
|
case 3:
|
| 366 |
|
|
__asm__ __volatile__ ("la 1,%0\n\t"
|
| 367 |
|
|
"ni 0(1),0xF7"
|
| 368 |
|
|
: "=m" (*((volatile char *) addr + ((nr>>3)^3)))
|
| 369 |
|
|
: : "1", "cc", "memory" );
|
| 370 |
|
|
break;
|
| 371 |
|
|
case 4:
|
| 372 |
|
|
__asm__ __volatile__ ("la 1,%0\n\t"
|
| 373 |
|
|
"ni 0(1),0xEF"
|
| 374 |
|
|
: "=m" (*((volatile char *) addr + ((nr>>3)^3)))
|
| 375 |
|
|
: : "cc", "memory" );
|
| 376 |
|
|
break;
|
| 377 |
|
|
case 5:
|
| 378 |
|
|
__asm__ __volatile__ ("la 1,%0\n\t"
|
| 379 |
|
|
"ni 0(1),0xDF"
|
| 380 |
|
|
: "=m" (*((volatile char *) addr + ((nr>>3)^3)))
|
| 381 |
|
|
: : "1", "cc", "memory" );
|
| 382 |
|
|
break;
|
| 383 |
|
|
case 6:
|
| 384 |
|
|
__asm__ __volatile__ ("la 1,%0\n\t"
|
| 385 |
|
|
"ni 0(1),0xBF"
|
| 386 |
|
|
: "=m" (*((volatile char *) addr + ((nr>>3)^3)))
|
| 387 |
|
|
: : "1", "cc", "memory" );
|
| 388 |
|
|
break;
|
| 389 |
|
|
case 7:
|
| 390 |
|
|
__asm__ __volatile__ ("la 1,%0\n\t"
|
| 391 |
|
|
"ni 0(1),0x7F"
|
| 392 |
|
|
: "=m" (*((volatile char *) addr + ((nr>>3)^3)))
|
| 393 |
|
|
: : "1", "cc", "memory" );
|
| 394 |
|
|
break;
|
| 395 |
|
|
}
|
| 396 |
|
|
}
|
| 397 |
|
|
|
| 398 |
|
|
#define clear_bit_simple(nr,addr) \
|
| 399 |
|
|
(__builtin_constant_p((nr)) ? \
|
| 400 |
|
|
__constant_clear_bit((nr),(addr)) : \
|
| 401 |
|
|
__clear_bit((nr),(addr)) )
|
| 402 |
|
|
|
| 403 |
|
|
/*
|
| 404 |
|
|
* fast, non-SMP change_bit routine
|
| 405 |
|
|
*/
|
| 406 |
|
|
static __inline__ void __change_bit(int nr, volatile void * addr)
|
| 407 |
|
|
{
|
| 408 |
|
|
unsigned long reg1, reg2;
|
| 409 |
|
|
__asm__ __volatile__(
|
| 410 |
|
|
" lhi %1,24\n"
|
| 411 |
|
|
" lhi %0,7\n"
|
| 412 |
|
|
" xr %1,%2\n"
|
| 413 |
|
|
" nr %0,%2\n"
|
| 414 |
|
|
" srl %1,3\n"
|
| 415 |
|
|
" la %1,0(%1,%3)\n"
|
| 416 |
|
|
" la %0,0(%0,%4)\n"
|
| 417 |
|
|
" xc 0(1,%1),0(%0)"
|
| 418 |
|
|
: "=&a" (reg1), "=&a" (reg2)
|
| 419 |
|
|
: "r" (nr), "a" (addr), "a" (&_oi_bitmap) : "cc", "memory" );
|
| 420 |
|
|
}
|
| 421 |
|
|
|
| 422 |
|
|
static __inline__ void
|
| 423 |
|
|
__constant_change_bit(const int nr, volatile void * addr)
|
| 424 |
|
|
{
|
| 425 |
|
|
switch (nr&7) {
|
| 426 |
|
|
case 0:
|
| 427 |
|
|
__asm__ __volatile__ ("la 1,%0\n\t"
|
| 428 |
|
|
"xi 0(1),0x01"
|
| 429 |
|
|
: "=m" (*((volatile char *) addr + ((nr>>3)^3)))
|
| 430 |
|
|
: : "cc", "memory" );
|
| 431 |
|
|
break;
|
| 432 |
|
|
case 1:
|
| 433 |
|
|
__asm__ __volatile__ ("la 1,%0\n\t"
|
| 434 |
|
|
"xi 0(1),0x02"
|
| 435 |
|
|
: "=m" (*((volatile char *) addr + ((nr>>3)^3)))
|
| 436 |
|
|
: : "cc", "memory" );
|
| 437 |
|
|
break;
|
| 438 |
|
|
case 2:
|
| 439 |
|
|
__asm__ __volatile__ ("la 1,%0\n\t"
|
| 440 |
|
|
"xi 0(1),0x04"
|
| 441 |
|
|
: "=m" (*((volatile char *) addr + ((nr>>3)^3)))
|
| 442 |
|
|
: : "cc", "memory" );
|
| 443 |
|
|
break;
|
| 444 |
|
|
case 3:
|
| 445 |
|
|
__asm__ __volatile__ ("la 1,%0\n\t"
|
| 446 |
|
|
"xi 0(1),0x08"
|
| 447 |
|
|
: "=m" (*((volatile char *) addr + ((nr>>3)^3)))
|
| 448 |
|
|
: : "cc", "memory" );
|
| 449 |
|
|
break;
|
| 450 |
|
|
case 4:
|
| 451 |
|
|
__asm__ __volatile__ ("la 1,%0\n\t"
|
| 452 |
|
|
"xi 0(1),0x10"
|
| 453 |
|
|
: "=m" (*((volatile char *) addr + ((nr>>3)^3)))
|
| 454 |
|
|
: : "cc", "memory" );
|
| 455 |
|
|
break;
|
| 456 |
|
|
case 5:
|
| 457 |
|
|
__asm__ __volatile__ ("la 1,%0\n\t"
|
| 458 |
|
|
"xi 0(1),0x20"
|
| 459 |
|
|
: "=m" (*((volatile char *) addr + ((nr>>3)^3)))
|
| 460 |
|
|
: : "1", "cc", "memory" );
|
| 461 |
|
|
break;
|
| 462 |
|
|
case 6:
|
| 463 |
|
|
__asm__ __volatile__ ("la 1,%0\n\t"
|
| 464 |
|
|
"xi 0(1),0x40"
|
| 465 |
|
|
: "=m" (*((volatile char *) addr + ((nr>>3)^3)))
|
| 466 |
|
|
: : "1", "cc", "memory" );
|
| 467 |
|
|
break;
|
| 468 |
|
|
case 7:
|
| 469 |
|
|
__asm__ __volatile__ ("la 1,%0\n\t"
|
| 470 |
|
|
"xi 0(1),0x80"
|
| 471 |
|
|
: "=m" (*((volatile char *) addr + ((nr>>3)^3)))
|
| 472 |
|
|
: : "1", "cc", "memory" );
|
| 473 |
|
|
break;
|
| 474 |
|
|
}
|
| 475 |
|
|
}
|
| 476 |
|
|
|
| 477 |
|
|
#define change_bit_simple(nr,addr) \
|
| 478 |
|
|
(__builtin_constant_p((nr)) ? \
|
| 479 |
|
|
__constant_change_bit((nr),(addr)) : \
|
| 480 |
|
|
__change_bit((nr),(addr)) )
|
| 481 |
|
|
|
| 482 |
|
|
/*
|
| 483 |
|
|
* fast, non-SMP test_and_set_bit routine
|
| 484 |
|
|
*/
|
| 485 |
|
|
static __inline__ int test_and_set_bit_simple(int nr, volatile void * addr)
|
| 486 |
|
|
{
|
| 487 |
|
|
unsigned long reg1, reg2;
|
| 488 |
|
|
int oldbit;
|
| 489 |
|
|
__asm__ __volatile__(
|
| 490 |
|
|
" lhi %1,24\n"
|
| 491 |
|
|
" lhi %2,7\n"
|
| 492 |
|
|
" xr %1,%3\n"
|
| 493 |
|
|
" nr %2,%3\n"
|
| 494 |
|
|
" srl %1,3\n"
|
| 495 |
|
|
" la %1,0(%1,%4)\n"
|
| 496 |
|
|
" ic %0,0(%1)\n"
|
| 497 |
|
|
" srl %0,0(%2)\n"
|
| 498 |
|
|
" la %2,0(%2,%5)\n"
|
| 499 |
|
|
" oc 0(1,%1),0(%2)"
|
| 500 |
|
|
: "=d&" (oldbit), "=&a" (reg1), "=&a" (reg2)
|
| 501 |
|
|
: "r" (nr), "a" (addr), "a" (&_oi_bitmap) : "cc", "memory" );
|
| 502 |
|
|
return oldbit & 1;
|
| 503 |
|
|
}
|
| 504 |
|
|
#define __test_and_set_bit(X,Y) test_and_set_bit_simple(X,Y)
|
| 505 |
|
|
|
| 506 |
|
|
/*
|
| 507 |
|
|
* fast, non-SMP test_and_clear_bit routine
|
| 508 |
|
|
*/
|
| 509 |
|
|
static __inline__ int test_and_clear_bit_simple(int nr, volatile void * addr)
|
| 510 |
|
|
{
|
| 511 |
|
|
unsigned long reg1, reg2;
|
| 512 |
|
|
int oldbit;
|
| 513 |
|
|
|
| 514 |
|
|
__asm__ __volatile__(
|
| 515 |
|
|
" lhi %1,24\n"
|
| 516 |
|
|
" lhi %2,7\n"
|
| 517 |
|
|
" xr %1,%3\n"
|
| 518 |
|
|
" nr %2,%3\n"
|
| 519 |
|
|
" srl %1,3\n"
|
| 520 |
|
|
" la %1,0(%1,%4)\n"
|
| 521 |
|
|
" ic %0,0(%1)\n"
|
| 522 |
|
|
" srl %0,0(%2)\n"
|
| 523 |
|
|
" la %2,0(%2,%5)\n"
|
| 524 |
|
|
" nc 0(1,%1),0(%2)"
|
| 525 |
|
|
: "=d&" (oldbit), "=&a" (reg1), "=&a" (reg2)
|
| 526 |
|
|
: "r" (nr), "a" (addr), "a" (&_ni_bitmap) : "cc", "memory" );
|
| 527 |
|
|
return oldbit & 1;
|
| 528 |
|
|
}
|
| 529 |
|
|
#define __test_and_clear_bit(X,Y) test_and_clear_bit_simple(X,Y)
|
| 530 |
|
|
|
| 531 |
|
|
/*
|
| 532 |
|
|
* fast, non-SMP test_and_change_bit routine
|
| 533 |
|
|
*/
|
| 534 |
|
|
static __inline__ int test_and_change_bit_simple(int nr, volatile void * addr)
|
| 535 |
|
|
{
|
| 536 |
|
|
unsigned long reg1, reg2;
|
| 537 |
|
|
int oldbit;
|
| 538 |
|
|
|
| 539 |
|
|
__asm__ __volatile__(
|
| 540 |
|
|
" lhi %1,24\n"
|
| 541 |
|
|
" lhi %2,7\n"
|
| 542 |
|
|
" xr %1,%3\n"
|
| 543 |
|
|
" nr %2,%1\n"
|
| 544 |
|
|
" srl %1,3\n"
|
| 545 |
|
|
" la %1,0(%1,%4)\n"
|
| 546 |
|
|
" ic %0,0(%1)\n"
|
| 547 |
|
|
" srl %0,0(%2)\n"
|
| 548 |
|
|
" la %2,0(%2,%5)\n"
|
| 549 |
|
|
" xc 0(1,%1),0(%2)"
|
| 550 |
|
|
: "=d&" (oldbit), "=&a" (reg1), "=&a" (reg2)
|
| 551 |
|
|
: "r" (nr), "a" (addr), "a" (&_oi_bitmap) : "cc", "memory" );
|
| 552 |
|
|
return oldbit & 1;
|
| 553 |
|
|
}
|
| 554 |
|
|
#define __test_and_change_bit(X,Y) test_and_change_bit_simple(X,Y)
|
| 555 |
|
|
|
| 556 |
|
|
#ifdef CONFIG_SMP
|
| 557 |
|
|
#define set_bit set_bit_cs
|
| 558 |
|
|
#define clear_bit clear_bit_cs
|
| 559 |
|
|
#define change_bit change_bit_cs
|
| 560 |
|
|
#define test_and_set_bit test_and_set_bit_cs
|
| 561 |
|
|
#define test_and_clear_bit test_and_clear_bit_cs
|
| 562 |
|
|
#define test_and_change_bit test_and_change_bit_cs
|
| 563 |
|
|
#else
|
| 564 |
|
|
#define set_bit set_bit_simple
|
| 565 |
|
|
#define clear_bit clear_bit_simple
|
| 566 |
|
|
#define change_bit change_bit_simple
|
| 567 |
|
|
#define test_and_set_bit test_and_set_bit_simple
|
| 568 |
|
|
#define test_and_clear_bit test_and_clear_bit_simple
|
| 569 |
|
|
#define test_and_change_bit test_and_change_bit_simple
|
| 570 |
|
|
#endif
|
| 571 |
|
|
|
| 572 |
|
|
|
| 573 |
|
|
/*
|
| 574 |
|
|
* This routine doesn't need to be atomic.
|
| 575 |
|
|
*/
|
| 576 |
|
|
|
| 577 |
|
|
static __inline__ int __test_bit(int nr, volatile void * addr)
|
| 578 |
|
|
{
|
| 579 |
|
|
unsigned long reg1, reg2;
|
| 580 |
|
|
int oldbit;
|
| 581 |
|
|
|
| 582 |
|
|
__asm__ __volatile__(
|
| 583 |
|
|
" lhi %2,24\n"
|
| 584 |
|
|
" lhi %1,7\n"
|
| 585 |
|
|
" xr %2,%3\n"
|
| 586 |
|
|
" nr %1,%3\n"
|
| 587 |
|
|
" srl %2,3\n"
|
| 588 |
|
|
" ic %0,0(%2,%4)\n"
|
| 589 |
|
|
" srl %0,0(%1)"
|
| 590 |
|
|
: "=d&" (oldbit), "=&a" (reg1), "=&a" (reg2)
|
| 591 |
|
|
: "r" (nr), "a" (addr) : "cc" );
|
| 592 |
|
|
return oldbit & 1;
|
| 593 |
|
|
}
|
| 594 |
|
|
|
| 595 |
|
|
static __inline__ int __constant_test_bit(int nr, volatile void * addr) {
|
| 596 |
|
|
return (((volatile char *) addr)[(nr>>3)^3] & (1<<(nr&7))) != 0;
|
| 597 |
|
|
}
|
| 598 |
|
|
|
| 599 |
|
|
#define test_bit(nr,addr) \
|
| 600 |
|
|
(__builtin_constant_p((nr)) ? \
|
| 601 |
|
|
__constant_test_bit((nr),(addr)) : \
|
| 602 |
|
|
__test_bit((nr),(addr)) )
|
| 603 |
|
|
|
| 604 |
|
|
/*
|
| 605 |
|
|
* Find-bit routines..
|
| 606 |
|
|
*/
|
| 607 |
|
|
static __inline__ int find_first_zero_bit(void * addr, unsigned size)
|
| 608 |
|
|
{
|
| 609 |
|
|
unsigned long cmp, count;
|
| 610 |
|
|
int res;
|
| 611 |
|
|
|
| 612 |
|
|
if (!size)
|
| 613 |
|
|
return 0;
|
| 614 |
|
|
__asm__(" lhi %1,-1\n"
|
| 615 |
|
|
" lr %2,%3\n"
|
| 616 |
|
|
" slr %0,%0\n"
|
| 617 |
|
|
" ahi %2,31\n"
|
| 618 |
|
|
" srl %2,5\n"
|
| 619 |
|
|
"0: c %1,0(%0,%4)\n"
|
| 620 |
|
|
" jne 1f\n"
|
| 621 |
|
|
" ahi %0,4\n"
|
| 622 |
|
|
" brct %2,0b\n"
|
| 623 |
|
|
" lr %0,%3\n"
|
| 624 |
|
|
" j 4f\n"
|
| 625 |
|
|
"1: l %2,0(%0,%4)\n"
|
| 626 |
|
|
" sll %0,3\n"
|
| 627 |
|
|
" lhi %1,0xff\n"
|
| 628 |
|
|
" tml %2,0xffff\n"
|
| 629 |
|
|
" jno 2f\n"
|
| 630 |
|
|
" ahi %0,16\n"
|
| 631 |
|
|
" srl %2,16\n"
|
| 632 |
|
|
"2: tml %2,0x00ff\n"
|
| 633 |
|
|
" jno 3f\n"
|
| 634 |
|
|
" ahi %0,8\n"
|
| 635 |
|
|
" srl %2,8\n"
|
| 636 |
|
|
"3: nr %2,%1\n"
|
| 637 |
|
|
" ic %2,0(%2,%5)\n"
|
| 638 |
|
|
" alr %0,%2\n"
|
| 639 |
|
|
"4:"
|
| 640 |
|
|
: "=&a" (res), "=&d" (cmp), "=&a" (count)
|
| 641 |
|
|
: "a" (size), "a" (addr), "a" (&_zb_findmap) : "cc" );
|
| 642 |
|
|
return (res < size) ? res : size;
|
| 643 |
|
|
}
|
| 644 |
|
|
|
| 645 |
|
|
static __inline__ int find_next_zero_bit (void * addr, int size, int offset)
|
| 646 |
|
|
{
|
| 647 |
|
|
unsigned long * p = ((unsigned long *) addr) + (offset >> 5);
|
| 648 |
|
|
unsigned long bitvec, reg;
|
| 649 |
|
|
int set, bit = offset & 31, res;
|
| 650 |
|
|
|
| 651 |
|
|
if (bit) {
|
| 652 |
|
|
/*
|
| 653 |
|
|
* Look for zero in first word
|
| 654 |
|
|
*/
|
| 655 |
|
|
bitvec = (*p) >> bit;
|
| 656 |
|
|
__asm__(" slr %0,%0\n"
|
| 657 |
|
|
" lhi %2,0xff\n"
|
| 658 |
|
|
" tml %1,0xffff\n"
|
| 659 |
|
|
" jno 0f\n"
|
| 660 |
|
|
" ahi %0,16\n"
|
| 661 |
|
|
" srl %1,16\n"
|
| 662 |
|
|
"0: tml %1,0x00ff\n"
|
| 663 |
|
|
" jno 1f\n"
|
| 664 |
|
|
" ahi %0,8\n"
|
| 665 |
|
|
" srl %1,8\n"
|
| 666 |
|
|
"1: nr %1,%2\n"
|
| 667 |
|
|
" ic %1,0(%1,%3)\n"
|
| 668 |
|
|
" alr %0,%1"
|
| 669 |
|
|
: "=&d" (set), "+a" (bitvec), "=&d" (reg)
|
| 670 |
|
|
: "a" (&_zb_findmap) : "cc" );
|
| 671 |
|
|
if (set < (32 - bit))
|
| 672 |
|
|
return set + offset;
|
| 673 |
|
|
offset += 32 - bit;
|
| 674 |
|
|
p++;
|
| 675 |
|
|
}
|
| 676 |
|
|
/*
|
| 677 |
|
|
* No zero yet, search remaining full words for a zero
|
| 678 |
|
|
*/
|
| 679 |
|
|
res = find_first_zero_bit (p, size - 32 * (p - (unsigned long *) addr));
|
| 680 |
|
|
return (offset + res);
|
| 681 |
|
|
}
|
| 682 |
|
|
|
| 683 |
|
|
/*
|
| 684 |
|
|
* ffz = Find First Zero in word. Undefined if no zero exists,
|
| 685 |
|
|
* so code should check against ~0UL first..
|
| 686 |
|
|
*/
|
| 687 |
|
|
static __inline__ unsigned long ffz(unsigned long word)
|
| 688 |
|
|
{
|
| 689 |
|
|
unsigned long reg;
|
| 690 |
|
|
int result;
|
| 691 |
|
|
|
| 692 |
|
|
__asm__(" slr %0,%0\n"
|
| 693 |
|
|
" lhi %2,0xff\n"
|
| 694 |
|
|
" tml %1,0xffff\n"
|
| 695 |
|
|
" jno 0f\n"
|
| 696 |
|
|
" ahi %0,16\n"
|
| 697 |
|
|
" srl %1,16\n"
|
| 698 |
|
|
"0: tml %1,0x00ff\n"
|
| 699 |
|
|
" jno 1f\n"
|
| 700 |
|
|
" ahi %0,8\n"
|
| 701 |
|
|
" srl %1,8\n"
|
| 702 |
|
|
"1: nr %1,%2\n"
|
| 703 |
|
|
" ic %1,0(%1,%3)\n"
|
| 704 |
|
|
" alr %0,%1"
|
| 705 |
|
|
: "=&d" (result), "+a" (word), "=&d" (reg)
|
| 706 |
|
|
: "a" (&_zb_findmap) : "cc" );
|
| 707 |
|
|
return result;
|
| 708 |
|
|
}
|
| 709 |
|
|
|
| 710 |
|
|
/*
|
| 711 |
|
|
* ffs: find first bit set. This is defined the same way as
|
| 712 |
|
|
* the libc and compiler builtin ffs routines, therefore
|
| 713 |
|
|
* differs in spirit from the above ffz (man ffs).
|
| 714 |
|
|
*/
|
| 715 |
|
|
|
| 716 |
|
|
extern int __inline__ ffs (int x)
|
| 717 |
|
|
{
|
| 718 |
|
|
int r;
|
| 719 |
|
|
|
| 720 |
|
|
if (x == 0)
|
| 721 |
|
|
return 0;
|
| 722 |
|
|
__asm__(" slr %0,%0\n"
|
| 723 |
|
|
" tml %1,0xffff\n"
|
| 724 |
|
|
" jnz 0f\n"
|
| 725 |
|
|
" ahi %0,16\n"
|
| 726 |
|
|
" srl %1,16\n"
|
| 727 |
|
|
"0: tml %1,0x00ff\n"
|
| 728 |
|
|
" jnz 1f\n"
|
| 729 |
|
|
" ahi %0,8\n"
|
| 730 |
|
|
" srl %1,8\n"
|
| 731 |
|
|
"1: tml %1,0x000f\n"
|
| 732 |
|
|
" jnz 2f\n"
|
| 733 |
|
|
" ahi %0,4\n"
|
| 734 |
|
|
" srl %1,4\n"
|
| 735 |
|
|
"2: tml %1,0x0003\n"
|
| 736 |
|
|
" jnz 3f\n"
|
| 737 |
|
|
" ahi %0,2\n"
|
| 738 |
|
|
" srl %1,2\n"
|
| 739 |
|
|
"3: tml %1,0x0001\n"
|
| 740 |
|
|
" jnz 4f\n"
|
| 741 |
|
|
" ahi %0,1\n"
|
| 742 |
|
|
"4:"
|
| 743 |
|
|
: "=&d" (r), "+d" (x) : : "cc" );
|
| 744 |
|
|
return r+1;
|
| 745 |
|
|
}
|
| 746 |
|
|
|
| 747 |
|
|
/*
|
| 748 |
|
|
* hweightN: returns the hamming weight (i.e. the number
|
| 749 |
|
|
* of bits set) of a N-bit word
|
| 750 |
|
|
*/
|
| 751 |
|
|
|
| 752 |
|
|
#define hweight32(x) generic_hweight32(x)
|
| 753 |
|
|
#define hweight16(x) generic_hweight16(x)
|
| 754 |
|
|
#define hweight8(x) generic_hweight8(x)
|
| 755 |
|
|
|
| 756 |
|
|
|
| 757 |
|
|
#ifdef __KERNEL__
|
| 758 |
|
|
|
| 759 |
|
|
/*
|
| 760 |
|
|
* ATTENTION: intel byte ordering convention for ext2 and minix !!
|
| 761 |
|
|
* bit 0 is the LSB of addr; bit 31 is the MSB of addr;
|
| 762 |
|
|
* bit 32 is the LSB of (addr+4).
|
| 763 |
|
|
* That combined with the little endian byte order of Intel gives the
|
| 764 |
|
|
* following bit order in memory:
|
| 765 |
|
|
* 07 06 05 04 03 02 01 00 15 14 13 12 11 10 09 08 \
|
| 766 |
|
|
* 23 22 21 20 19 18 17 16 31 30 29 28 27 26 25 24
|
| 767 |
|
|
*/
|
| 768 |
|
|
|
| 769 |
|
|
#define ext2_set_bit(nr, addr) test_and_set_bit((nr)^24, addr)
|
| 770 |
|
|
#define ext2_clear_bit(nr, addr) test_and_clear_bit((nr)^24, addr)
|
| 771 |
|
|
#define ext2_test_bit(nr, addr) test_bit((nr)^24, addr)
|
| 772 |
|
|
static __inline__ int ext2_find_first_zero_bit(void *vaddr, unsigned size)
|
| 773 |
|
|
{
|
| 774 |
|
|
unsigned long cmp, count;
|
| 775 |
|
|
int res;
|
| 776 |
|
|
|
| 777 |
|
|
if (!size)
|
| 778 |
|
|
return 0;
|
| 779 |
|
|
__asm__(" lhi %1,-1\n"
|
| 780 |
|
|
" lr %2,%3\n"
|
| 781 |
|
|
" ahi %2,31\n"
|
| 782 |
|
|
" srl %2,5\n"
|
| 783 |
|
|
" slr %0,%0\n"
|
| 784 |
|
|
"0: cl %1,0(%0,%4)\n"
|
| 785 |
|
|
" jne 1f\n"
|
| 786 |
|
|
" ahi %0,4\n"
|
| 787 |
|
|
" brct %2,0b\n"
|
| 788 |
|
|
" lr %0,%3\n"
|
| 789 |
|
|
" j 4f\n"
|
| 790 |
|
|
"1: l %2,0(%0,%4)\n"
|
| 791 |
|
|
" sll %0,3\n"
|
| 792 |
|
|
" ahi %0,24\n"
|
| 793 |
|
|
" lhi %1,0xff\n"
|
| 794 |
|
|
" tmh %2,0xffff\n"
|
| 795 |
|
|
" jo 2f\n"
|
| 796 |
|
|
" ahi %0,-16\n"
|
| 797 |
|
|
" srl %2,16\n"
|
| 798 |
|
|
"2: tml %2,0xff00\n"
|
| 799 |
|
|
" jo 3f\n"
|
| 800 |
|
|
" ahi %0,-8\n"
|
| 801 |
|
|
" srl %2,8\n"
|
| 802 |
|
|
"3: nr %2,%1\n"
|
| 803 |
|
|
" ic %2,0(%2,%5)\n"
|
| 804 |
|
|
" alr %0,%2\n"
|
| 805 |
|
|
"4:"
|
| 806 |
|
|
: "=&a" (res), "=&d" (cmp), "=&a" (count)
|
| 807 |
|
|
: "a" (size), "a" (vaddr), "a" (&_zb_findmap) : "cc" );
|
| 808 |
|
|
return (res < size) ? res : size;
|
| 809 |
|
|
}
|
| 810 |
|
|
|
| 811 |
|
|
static __inline__ int
|
| 812 |
|
|
ext2_find_next_zero_bit(void *vaddr, unsigned size, unsigned offset)
|
| 813 |
|
|
{
|
| 814 |
|
|
unsigned long *addr = vaddr;
|
| 815 |
|
|
unsigned long *p = addr + (offset >> 5);
|
| 816 |
|
|
unsigned long word, reg;
|
| 817 |
|
|
int bit = offset & 31UL, res;
|
| 818 |
|
|
|
| 819 |
|
|
if (offset >= size)
|
| 820 |
|
|
return size;
|
| 821 |
|
|
|
| 822 |
|
|
if (bit) {
|
| 823 |
|
|
__asm__(" ic %0,0(%1)\n"
|
| 824 |
|
|
" icm %0,2,1(%1)\n"
|
| 825 |
|
|
" icm %0,4,2(%1)\n"
|
| 826 |
|
|
" icm %0,8,3(%1)"
|
| 827 |
|
|
: "=&a" (word) : "a" (p) : "cc" );
|
| 828 |
|
|
word >>= bit;
|
| 829 |
|
|
res = bit;
|
| 830 |
|
|
/* Look for zero in first longword */
|
| 831 |
|
|
__asm__(" lhi %2,0xff\n"
|
| 832 |
|
|
" tml %1,0xffff\n"
|
| 833 |
|
|
" jno 0f\n"
|
| 834 |
|
|
" ahi %0,16\n"
|
| 835 |
|
|
" srl %1,16\n"
|
| 836 |
|
|
"0: tml %1,0x00ff\n"
|
| 837 |
|
|
" jno 1f\n"
|
| 838 |
|
|
" ahi %0,8\n"
|
| 839 |
|
|
" srl %1,8\n"
|
| 840 |
|
|
"1: nr %1,%2\n"
|
| 841 |
|
|
" ic %1,0(%1,%3)\n"
|
| 842 |
|
|
" alr %0,%1"
|
| 843 |
|
|
: "+&d" (res), "+&a" (word), "=&d" (reg)
|
| 844 |
|
|
: "a" (&_zb_findmap) : "cc" );
|
| 845 |
|
|
if (res < 32)
|
| 846 |
|
|
return (p - addr)*32 + res;
|
| 847 |
|
|
p++;
|
| 848 |
|
|
}
|
| 849 |
|
|
/* No zero yet, search remaining full bytes for a zero */
|
| 850 |
|
|
res = ext2_find_first_zero_bit (p, size - 32 * (p - addr));
|
| 851 |
|
|
return (p - addr) * 32 + res;
|
| 852 |
|
|
}
|
| 853 |
|
|
|
| 854 |
|
|
/* Bitmap functions for the minix filesystem. */
|
| 855 |
|
|
/* FIXME !!! */
|
| 856 |
|
|
#define minix_test_and_set_bit(nr,addr) test_and_set_bit(nr,addr)
|
| 857 |
|
|
#define minix_set_bit(nr,addr) set_bit(nr,addr)
|
| 858 |
|
|
#define minix_test_and_clear_bit(nr,addr) test_and_clear_bit(nr,addr)
|
| 859 |
|
|
#define minix_test_bit(nr,addr) test_bit(nr,addr)
|
| 860 |
|
|
#define minix_find_first_zero_bit(addr,size) find_first_zero_bit(addr,size)
|
| 861 |
|
|
|
| 862 |
|
|
#endif /* __KERNEL__ */
|
| 863 |
|
|
|
| 864 |
|
|
#endif /* _S390_BITOPS_H */
|
