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-rw-r--r--include/asm-h8300/bitops.h410
1 files changed, 410 insertions, 0 deletions
diff --git a/include/asm-h8300/bitops.h b/include/asm-h8300/bitops.h
new file mode 100644
index 00000000000..5036f595f8c
--- /dev/null
+++ b/include/asm-h8300/bitops.h
@@ -0,0 +1,410 @@
+#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/byteorder.h> /* swab32 */
+#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
+
+#define find_first_zero_bit(addr, size) \
+ find_next_zero_bit((addr), (size), 0)
+
+#define ffs(x) generic_ffs(x)
+
+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;
+}
+
+static __inline__ int find_next_zero_bit (const unsigned long * addr, int size, int offset)
+{
+ unsigned long *p = (unsigned long *)(((unsigned long)addr + (offset >> 3)) & ~3);
+ unsigned long result = offset & ~31UL;
+ unsigned long tmp;
+
+ if (offset >= size)
+ return size;
+ size -= result;
+ offset &= 31UL;
+ if (offset) {
+ tmp = *(p++);
+ tmp |= ~0UL >> (32-offset);
+ if (size < 32)
+ goto found_first;
+ if (~tmp)
+ goto found_middle;
+ size -= 32;
+ result += 32;
+ }
+ while (size & ~31UL) {
+ if (~(tmp = *(p++)))
+ goto found_middle;
+ result += 32;
+ size -= 32;
+ }
+ if (!size)
+ return result;
+ tmp = *p;
+
+found_first:
+ tmp |= ~0UL >> size;
+found_middle:
+ return result + ffz(tmp);
+}
+
+static __inline__ unsigned long find_next_bit(const unsigned long *addr,
+ unsigned long size, unsigned long offset)
+{
+ unsigned long *p = (unsigned long *)(((unsigned long)addr + (offset >> 3)) & ~3);
+ unsigned int result = offset & ~31UL;
+ unsigned int tmp;
+
+ if (offset >= size)
+ return size;
+ size -= result;
+ offset &= 31UL;
+ if (offset) {
+ tmp = *(p++);
+ tmp &= ~0UL << offset;
+ if (size < 32)
+ goto found_first;
+ if (tmp)
+ goto found_middle;
+ size -= 32;
+ result += 32;
+ }
+ while (size >= 32) {
+ if ((tmp = *p++) != 0)
+ goto found_middle;
+ result += 32;
+ size -= 32;
+ }
+ if (!size)
+ return result;
+ tmp = *p;
+
+found_first:
+ tmp &= ~0UL >> (32 - size);
+ if (tmp == 0UL)
+ return result + size;
+found_middle:
+ return result + __ffs(tmp);
+}
+
+#define find_first_bit(addr, size) find_next_bit(addr, size, 0)
+
+/*
+ * Every architecture must define this function. It's the fastest
+ * way of searching a 140-bit bitmap where the first 100 bits are
+ * unlikely to be set. It's guaranteed that at least one of the 140
+ * bits is cleared.
+ */
+static inline int sched_find_first_bit(unsigned long *b)
+{
+ if (unlikely(b[0]))
+ return __ffs(b[0]);
+ if (unlikely(b[1]))
+ return __ffs(b[1]) + 32;
+ if (unlikely(b[2]))
+ return __ffs(b[2]) + 64;
+ if (b[3])
+ return __ffs(b[3]) + 96;
+ return __ffs(b[4]) + 128;
+}
+
+/*
+ * hweightN: returns the hamming weight (i.e. the number
+ * of bits set) of a N-bit word
+ */
+
+#define hweight32(x) generic_hweight32(x)
+#define hweight16(x) generic_hweight16(x)
+#define hweight8(x) generic_hweight8(x)
+
+static __inline__ int ext2_set_bit(int nr, volatile void * addr)
+{
+ int mask, retval;
+ unsigned long flags;
+ volatile unsigned char *ADDR = (unsigned char *) addr;
+
+ ADDR += nr >> 3;
+ mask = 1 << (nr & 0x07);
+ local_irq_save(flags);
+ retval = (mask & *ADDR) != 0;
+ *ADDR |= mask;
+ local_irq_restore(flags);
+ return retval;
+}
+#define ext2_set_bit_atomic(lock, nr, addr) ext2_set_bit(nr, addr)
+
+static __inline__ int ext2_clear_bit(int nr, volatile void * addr)
+{
+ int mask, retval;
+ unsigned long flags;
+ volatile unsigned char *ADDR = (unsigned char *) addr;
+
+ ADDR += nr >> 3;
+ mask = 1 << (nr & 0x07);
+ local_irq_save(flags);
+ retval = (mask & *ADDR) != 0;
+ *ADDR &= ~mask;
+ local_irq_restore(flags);
+ return retval;
+}
+#define ext2_clear_bit_atomic(lock, nr, addr) ext2_set_bit(nr, addr)
+
+static __inline__ int ext2_test_bit(int nr, const volatile void * addr)
+{
+ int mask;
+ const volatile unsigned char *ADDR = (const unsigned char *) addr;
+
+ ADDR += nr >> 3;
+ mask = 1 << (nr & 0x07);
+ return ((mask & *ADDR) != 0);
+}
+
+#define ext2_find_first_zero_bit(addr, size) \
+ ext2_find_next_zero_bit((addr), (size), 0)
+
+static __inline__ unsigned long ext2_find_next_zero_bit(void *addr, unsigned long size, unsigned long offset)
+{
+ unsigned long *p = ((unsigned long *) addr) + (offset >> 5);
+ unsigned long result = offset & ~31UL;
+ unsigned long tmp;
+
+ if (offset >= size)
+ return size;
+ size -= result;
+ offset &= 31UL;
+ if(offset) {
+ /* We hold the little endian value in tmp, but then the
+ * shift is illegal. So we could keep a big endian value
+ * in tmp, like this:
+ *
+ * tmp = __swab32(*(p++));
+ * tmp |= ~0UL >> (32-offset);
+ *
+ * but this would decrease performance, so we change the
+ * shift:
+ */
+ tmp = *(p++);
+ tmp |= __swab32(~0UL >> (32-offset));
+ if(size < 32)
+ goto found_first;
+ if(~tmp)
+ goto found_middle;
+ size -= 32;
+ result += 32;
+ }
+ while(size & ~31UL) {
+ if(~(tmp = *(p++)))
+ goto found_middle;
+ result += 32;
+ size -= 32;
+ }
+ if(!size)
+ return result;
+ tmp = *p;
+
+found_first:
+ /* tmp is little endian, so we would have to swab the shift,
+ * see above. But then we have to swab tmp below for ffz, so
+ * we might as well do this here.
+ */
+ return result + ffz(__swab32(tmp) | (~0UL << size));
+found_middle:
+ return result + ffz(__swab32(tmp));
+}
+
+/* Bitmap functions for the minix filesystem. */
+#define minix_test_and_set_bit(nr,addr) test_and_set_bit(nr,addr)
+#define minix_set_bit(nr,addr) set_bit(nr,addr)
+#define minix_test_and_clear_bit(nr,addr) test_and_clear_bit(nr,addr)
+#define minix_test_bit(nr,addr) test_bit(nr,addr)
+#define minix_find_first_zero_bit(addr,size) find_first_zero_bit(addr,size)
+
+#endif /* __KERNEL__ */
+
+#define fls(x) generic_fls(x)
+
+#endif /* _H8300_BITOPS_H */
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