Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /* SPDX-License-Identifier: GPL-2.0-or-later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * PowerPC atomic bit operations.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Merged version by David Gibson <david@gibson.dropbear.id.au>.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Based on ppc64 versions by: Dave Engebretsen, Todd Inglett, Don
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Reed, Pat McCarthy, Peter Bergner, Anton Blanchard.  They
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * originally took it from the ppc32 code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  * Within a word, bits are numbered LSB first.  Lot's of places make
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  * this assumption by directly testing bits with (val & (1<<nr)).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  * This can cause confusion for large (> 1 word) bitmaps on a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  * big-endian system because, unlike little endian, the number of each
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  * bit depends on the word size.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  * The bitop functions are defined to work on unsigned longs, so for a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  * ppc64 system the bits end up numbered:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18)  *   |63..............0|127............64|191...........128|255...........192|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19)  * and on ppc32:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20)  *   |31.....0|63....32|95....64|127...96|159..128|191..160|223..192|255..224|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22)  * There are a few little-endian macros used mostly for filesystem
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23)  * bitmaps, these work on similar bit arrays layouts, but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24)  * byte-oriented:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25)  *   |7...0|15...8|23...16|31...24|39...32|47...40|55...48|63...56|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27)  * The main difference is that bit 3-5 (64b) or 3-4 (32b) in the bit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28)  * number field needs to be reversed compared to the big-endian bit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29)  * fields. This can be achieved by XOR with 0x38 (64b) or 0x18 (32b).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #ifndef _ASM_POWERPC_BITOPS_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #define _ASM_POWERPC_BITOPS_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #ifdef __KERNEL__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #ifndef _LINUX_BITOPS_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) #error only <linux/bitops.h> can be included directly
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) #include <linux/compiler.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) #include <asm/asm-compat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) #include <asm/synch.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) /* PPC bit number conversion */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) #define PPC_BITLSHIFT(be)	(BITS_PER_LONG - 1 - (be))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) #define PPC_BIT(bit)		(1UL << PPC_BITLSHIFT(bit))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) #define PPC_BITMASK(bs, be)	((PPC_BIT(bs) - PPC_BIT(be)) | PPC_BIT(bs))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) /* Put a PPC bit into a "normal" bit position */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) #define PPC_BITEXTRACT(bits, ppc_bit, dst_bit)			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	((((bits) >> PPC_BITLSHIFT(ppc_bit)) & 1) << (dst_bit))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) #define PPC_BITLSHIFT32(be)	(32 - 1 - (be))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) #define PPC_BIT32(bit)		(1UL << PPC_BITLSHIFT32(bit))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) #define PPC_BITMASK32(bs, be)	((PPC_BIT32(bs) - PPC_BIT32(be))|PPC_BIT32(bs))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) #define PPC_BITLSHIFT8(be)	(8 - 1 - (be))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) #define PPC_BIT8(bit)		(1UL << PPC_BITLSHIFT8(bit))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) #define PPC_BITMASK8(bs, be)	((PPC_BIT8(bs) - PPC_BIT8(be))|PPC_BIT8(bs))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) #include <asm/barrier.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) /* Macro for generating the ***_bits() functions */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) #define DEFINE_BITOP(fn, op, prefix)		\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) static inline void fn(unsigned long mask,	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		volatile unsigned long *_p)	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) {						\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	unsigned long old;			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	unsigned long *p = (unsigned long *)_p;	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	__asm__ __volatile__ (			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	prefix					\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) "1:"	PPC_LLARX(%0,0,%3,0) "\n"		\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	stringify_in_c(op) "%0,%0,%2\n"		\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	PPC_STLCX "%0,0,%3\n"			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	"bne- 1b\n"				\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	: "=&r" (old), "+m" (*p)		\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	: "r" (mask), "r" (p)			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	: "cc", "memory");			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) DEFINE_BITOP(set_bits, or, "")
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) DEFINE_BITOP(clear_bits, andc, "")
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) DEFINE_BITOP(clear_bits_unlock, andc, PPC_RELEASE_BARRIER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) DEFINE_BITOP(change_bits, xor, "")
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) static inline void arch_set_bit(int nr, volatile unsigned long *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	set_bits(BIT_MASK(nr), addr + BIT_WORD(nr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) static inline void arch_clear_bit(int nr, volatile unsigned long *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	clear_bits(BIT_MASK(nr), addr + BIT_WORD(nr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) static inline void arch_clear_bit_unlock(int nr, volatile unsigned long *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	clear_bits_unlock(BIT_MASK(nr), addr + BIT_WORD(nr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) static inline void arch_change_bit(int nr, volatile unsigned long *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	change_bits(BIT_MASK(nr), addr + BIT_WORD(nr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) /* Like DEFINE_BITOP(), with changes to the arguments to 'op' and the output
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)  * operands. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) #define DEFINE_TESTOP(fn, op, prefix, postfix, eh)	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) static inline unsigned long fn(			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		unsigned long mask,			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		volatile unsigned long *_p)		\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) {							\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	unsigned long old, t;				\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	unsigned long *p = (unsigned long *)_p;		\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	__asm__ __volatile__ (				\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	prefix						\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) "1:"	PPC_LLARX(%0,0,%3,eh) "\n"			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	stringify_in_c(op) "%1,%0,%2\n"			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	PPC_STLCX "%1,0,%3\n"				\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	"bne- 1b\n"					\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	postfix						\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	: "=&r" (old), "=&r" (t)			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	: "r" (mask), "r" (p)				\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	: "cc", "memory");				\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	return (old & mask);				\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) DEFINE_TESTOP(test_and_set_bits, or, PPC_ATOMIC_ENTRY_BARRIER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	      PPC_ATOMIC_EXIT_BARRIER, 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) DEFINE_TESTOP(test_and_set_bits_lock, or, "",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	      PPC_ACQUIRE_BARRIER, 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) DEFINE_TESTOP(test_and_clear_bits, andc, PPC_ATOMIC_ENTRY_BARRIER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	      PPC_ATOMIC_EXIT_BARRIER, 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) DEFINE_TESTOP(test_and_change_bits, xor, PPC_ATOMIC_ENTRY_BARRIER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	      PPC_ATOMIC_EXIT_BARRIER, 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) static inline int arch_test_and_set_bit(unsigned long nr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 					volatile unsigned long *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	return test_and_set_bits(BIT_MASK(nr), addr + BIT_WORD(nr)) != 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) static inline int arch_test_and_set_bit_lock(unsigned long nr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 					     volatile unsigned long *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	return test_and_set_bits_lock(BIT_MASK(nr),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 				addr + BIT_WORD(nr)) != 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) static inline int arch_test_and_clear_bit(unsigned long nr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 					  volatile unsigned long *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	return test_and_clear_bits(BIT_MASK(nr), addr + BIT_WORD(nr)) != 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) static inline int arch_test_and_change_bit(unsigned long nr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 					   volatile unsigned long *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	return test_and_change_bits(BIT_MASK(nr), addr + BIT_WORD(nr)) != 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) #ifdef CONFIG_PPC64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) static inline unsigned long
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) clear_bit_unlock_return_word(int nr, volatile unsigned long *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	unsigned long old, t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	unsigned long *p = (unsigned long *)addr + BIT_WORD(nr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	unsigned long mask = BIT_MASK(nr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	__asm__ __volatile__ (
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	PPC_RELEASE_BARRIER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) "1:"	PPC_LLARX(%0,0,%3,0) "\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	"andc %1,%0,%2\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	PPC_STLCX "%1,0,%3\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	"bne- 1b\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	: "=&r" (old), "=&r" (t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	: "r" (mask), "r" (p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	: "cc", "memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	return old;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)  * This is a special function for mm/filemap.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)  * Bit 7 corresponds to PG_waiters.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) #define arch_clear_bit_unlock_is_negative_byte(nr, addr)		\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	(clear_bit_unlock_return_word(nr, addr) & BIT_MASK(7))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) #endif /* CONFIG_PPC64 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) #include <asm-generic/bitops/non-atomic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) static inline void arch___clear_bit_unlock(int nr, volatile unsigned long *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	__asm__ __volatile__(PPC_RELEASE_BARRIER "" ::: "memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	__clear_bit(nr, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)  * Return the zero-based bit position (LE, not IBM bit numbering) of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)  * the most significant 1-bit in a double word.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) #define __ilog2(x)	ilog2(x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) #include <asm-generic/bitops/ffz.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) #include <asm-generic/bitops/builtin-__ffs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) #include <asm-generic/bitops/builtin-ffs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)  * fls: find last (most-significant) bit set.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)  * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) static inline int fls(unsigned int x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	int lz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	if (__builtin_constant_p(x))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		return x ? 32 - __builtin_clz(x) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	asm("cntlzw %0,%1" : "=r" (lz) : "r" (x));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	return 32 - lz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) #include <asm-generic/bitops/builtin-__fls.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)  * 64-bit can do this using one cntlzd (count leading zeroes doubleword)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)  * instruction; for 32-bit we use the generic version, which does two
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)  * 32-bit fls calls.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) #ifdef CONFIG_PPC64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) static inline int fls64(__u64 x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	int lz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	if (__builtin_constant_p(x))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 		return x ? 64 - __builtin_clzll(x) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	asm("cntlzd %0,%1" : "=r" (lz) : "r" (x));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	return 64 - lz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) #include <asm-generic/bitops/fls64.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) #ifdef CONFIG_PPC64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) unsigned int __arch_hweight8(unsigned int w);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) unsigned int __arch_hweight16(unsigned int w);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) unsigned int __arch_hweight32(unsigned int w);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) unsigned long __arch_hweight64(__u64 w);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) #include <asm-generic/bitops/const_hweight.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) #include <asm-generic/bitops/hweight.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) #include <asm-generic/bitops/find.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) /* wrappers that deal with KASAN instrumentation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) #include <asm-generic/bitops/instrumented-atomic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) #include <asm-generic/bitops/instrumented-lock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) /* Little-endian versions */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) #include <asm-generic/bitops/le.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) /* Bitmap functions for the ext2 filesystem */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) #include <asm-generic/bitops/ext2-atomic-setbit.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) #include <asm-generic/bitops/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) #endif /* __KERNEL__ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) #endif /* _ASM_POWERPC_BITOPS_H */