#ifndef _H8300_BITOPS_H #define _H8300_BITOPS_H /* * Copyright 1992, Linus Torvalds. * Copyright 2002, Yoshinori Sato */ #include <linux/config.h> #include <linux/compiler.h> #include <asm/system.h> #ifdef __KERNEL__ /* * Function prototypes to keep gcc -Wall happy */ /* * ffz = Find First Zero in word. Undefined if no zero exists, * so code should check against ~0UL first.. */ static __inline__ unsigned long ffz(unsigned long word) { unsigned long result; result = -1; __asm__("1:\n\t" "shlr.l %2\n\t" "adds #1,%0\n\t" "bcs 1b" : "=r" (result) : "0" (result),"r" (word)); return result; } #define H8300_GEN_BITOP_CONST(OP,BIT) \ case BIT: \ __asm__(OP " #" #BIT ",@%0"::"r"(b_addr):"memory"); \ break; #define H8300_GEN_BITOP(FNAME,OP) \ static __inline__ void FNAME(int nr, volatile unsigned long* addr) \ { \ volatile unsigned char *b_addr; \ b_addr = (volatile unsigned char *)addr + ((nr >> 3) ^ 3); \ if (__builtin_constant_p(nr)) { \ switch(nr & 7) { \ H8300_GEN_BITOP_CONST(OP,0) \ H8300_GEN_BITOP_CONST(OP,1) \ H8300_GEN_BITOP_CONST(OP,2) \ H8300_GEN_BITOP_CONST(OP,3) \ H8300_GEN_BITOP_CONST(OP,4) \ H8300_GEN_BITOP_CONST(OP,5) \ H8300_GEN_BITOP_CONST(OP,6) \ H8300_GEN_BITOP_CONST(OP,7) \ } \ } else { \ __asm__(OP " %w0,@%1"::"r"(nr),"r"(b_addr):"memory"); \ } \ } /* * clear_bit() doesn't provide any barrier for the compiler. */ #define smp_mb__before_clear_bit() barrier() #define smp_mb__after_clear_bit() barrier() H8300_GEN_BITOP(set_bit ,"bset") H8300_GEN_BITOP(clear_bit ,"bclr") H8300_GEN_BITOP(change_bit,"bnot") #define __set_bit(nr,addr) set_bit((nr),(addr)) #define __clear_bit(nr,addr) clear_bit((nr),(addr)) #define __change_bit(nr,addr) change_bit((nr),(addr)) #undef H8300_GEN_BITOP #undef H8300_GEN_BITOP_CONST static __inline__ int test_bit(int nr, const unsigned long* addr) { return (*((volatile unsigned char *)addr + ((nr >> 3) ^ 3)) & (1UL << (nr & 7))) != 0; } #define __test_bit(nr, addr) test_bit(nr, addr) #define H8300_GEN_TEST_BITOP_CONST_INT(OP,BIT) \ case BIT: \ __asm__("stc ccr,%w1\n\t" \ "orc #0x80,ccr\n\t" \ "bld #" #BIT ",@%4\n\t" \ OP " #" #BIT ",@%4\n\t" \ "rotxl.l %0\n\t" \ "ldc %w1,ccr" \ : "=r"(retval),"=&r"(ccrsave),"=m"(*b_addr) \ : "0" (retval),"r" (b_addr) \ : "memory"); \ break; #define H8300_GEN_TEST_BITOP_CONST(OP,BIT) \ case BIT: \ __asm__("bld #" #BIT ",@%3\n\t" \ OP " #" #BIT ",@%3\n\t" \ "rotxl.l %0\n\t" \ : "=r"(retval),"=m"(*b_addr) \ : "0" (retval),"r" (b_addr) \ : "memory"); \ break; #define H8300_GEN_TEST_BITOP(FNNAME,OP) \ static __inline__ int FNNAME(int nr, volatile void * addr) \ { \ int retval = 0; \ char ccrsave; \ volatile unsigned char *b_addr; \ b_addr = (volatile unsigned char *)addr + ((nr >> 3) ^ 3); \ if (__builtin_constant_p(nr)) { \ switch(nr & 7) { \ H8300_GEN_TEST_BITOP_CONST_INT(OP,0) \ H8300_GEN_TEST_BITOP_CONST_INT(OP,1) \ H8300_GEN_TEST_BITOP_CONST_INT(OP,2) \ H8300_GEN_TEST_BITOP_CONST_INT(OP,3) \ H8300_GEN_TEST_BITOP_CONST_INT(OP,4) \ H8300_GEN_TEST_BITOP_CONST_INT(OP,5) \ H8300_GEN_TEST_BITOP_CONST_INT(OP,6) \ H8300_GEN_TEST_BITOP_CONST_INT(OP,7) \ } \ } else { \ __asm__("stc ccr,%w1\n\t" \ "orc #0x80,ccr\n\t" \ "btst %w5,@%4\n\t" \ OP " %w5,@%4\n\t" \ "beq 1f\n\t" \ "inc.l #1,%0\n" \ "1:\n\t" \ "ldc %w1,ccr" \ : "=r"(retval),"=&r"(ccrsave),"=m"(*b_addr) \ : "0" (retval),"r" (b_addr),"r"(nr) \ : "memory"); \ } \ return retval; \ } \ \ static __inline__ int __ ## FNNAME(int nr, volatile void * addr) \ { \ int retval = 0; \ volatile unsigned char *b_addr; \ b_addr = (volatile unsigned char *)addr + ((nr >> 3) ^ 3); \ if (__builtin_constant_p(nr)) { \ switch(nr & 7) { \ H8300_GEN_TEST_BITOP_CONST(OP,0) \ H8300_GEN_TEST_BITOP_CONST(OP,1) \ H8300_GEN_TEST_BITOP_CONST(OP,2) \ H8300_GEN_TEST_BITOP_CONST(OP,3) \ H8300_GEN_TEST_BITOP_CONST(OP,4) \ H8300_GEN_TEST_BITOP_CONST(OP,5) \ H8300_GEN_TEST_BITOP_CONST(OP,6) \ H8300_GEN_TEST_BITOP_CONST(OP,7) \ } \ } else { \ __asm__("btst %w4,@%3\n\t" \ OP " %w4,@%3\n\t" \ "beq 1f\n\t" \ "inc.l #1,%0\n" \ "1:" \ : "=r"(retval),"=m"(*b_addr) \ : "0" (retval),"r" (b_addr),"r"(nr) \ : "memory"); \ } \ return retval; \ } H8300_GEN_TEST_BITOP(test_and_set_bit, "bset") H8300_GEN_TEST_BITOP(test_and_clear_bit, "bclr") H8300_GEN_TEST_BITOP(test_and_change_bit,"bnot") #undef H8300_GEN_TEST_BITOP_CONST #undef H8300_GEN_TEST_BITOP_CONST_INT #undef H8300_GEN_TEST_BITOP #include <asm-generic/bitops/ffs.h> static __inline__ unsigned long __ffs(unsigned long word) { unsigned long result; result = -1; __asm__("1:\n\t" "shlr.l %2\n\t" "adds #1,%0\n\t" "bcc 1b" : "=r" (result) : "0"(result),"r"(word)); return result; } #include <asm-generic/bitops/find.h> #include <asm-generic/bitops/sched.h> #include <asm-generic/bitops/hweight.h> #include <asm-generic/bitops/ext2-non-atomic.h> #include <asm-generic/bitops/ext2-atomic.h> #include <asm-generic/bitops/minix.h> #endif /* __KERNEL__ */ #include <asm-generic/bitops/fls.h> #include <asm-generic/bitops/fls64.h> #endif /* _H8300_BITOPS_H */