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MIPS: retire "asm/llsc.h"

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all that "asm/llsc.h" does is just to help inline asm, which can be
stringifyed from "asm/asm.h"

+. Since "asm/asm.h" has all we need, retire "asm/llsc.h"

+. remove unused header file

Inspired-by:   Maciej W. Rozycki <macro@orcam.me.uk>
Signed-off-by: Huang Pei <huangpei@loongson.cn>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Huang Pei 2021-12-15 16:45:00 +08:00 committed by Thomas Bogendoerfer
parent 10657660c1
commit f0b7ddbd79
6 changed files with 31 additions and 69 deletions
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4
arch/mips/include/asm/asm.h
View file

@ -222,6 +222,8 @@ symbol = value
#define LONG_SRLV srlv
#define LONG_SRA sra
#define LONG_SRAV srav
#define LONG_INS ins
#define LONG_EXT ext
#ifdef __ASSEMBLY__
#define LONG .word
@ -249,6 +251,8 @@ symbol = value
#define LONG_SRLV dsrlv
#define LONG_SRA dsra
#define LONG_SRAV dsrav
#define LONG_INS dins
#define LONG_EXT dext
#ifdef __ASSEMBLY__
#define LONG .dword

11
arch/mips/include/asm/atomic.h
View file

@ -16,13 +16,12 @@
#include <linux/irqflags.h>
#include <linux/types.h>
#include <asm/asm.h>
#include <asm/barrier.h>
#include <asm/compiler.h>
#include <asm/cpu-features.h>
#include <asm/cmpxchg.h>
#include <asm/llsc.h>
#include <asm/sync.h>
#include <asm/war.h>
#define ATOMIC_OPS(pfx, type) \
static __always_inline type arch_##pfx##_read(const pfx##_t *v) \
@ -74,7 +73,7 @@ static __inline__ void arch_##pfx##_##op(type i, pfx##_t * v) \
"1: " #ll " %0, %1 # " #pfx "_" #op " \n" \
" " #asm_op " %0, %2 \n" \
" " #sc " %0, %1 \n" \
"\t" __SC_BEQZ "%0, 1b \n" \
"\t" __stringify(SC_BEQZ) " %0, 1b \n" \
" .set pop \n" \
: "=&r" (temp), "+" GCC_OFF_SMALL_ASM() (v->counter) \
: "Ir" (i) : __LLSC_CLOBBER); \
@ -104,7 +103,7 @@ arch_##pfx##_##op##_return_relaxed(type i, pfx##_t * v) \
"1: " #ll " %1, %2 # " #pfx "_" #op "_return\n" \
" " #asm_op " %0, %1, %3 \n" \
" " #sc " %0, %2 \n" \
"\t" __SC_BEQZ "%0, 1b \n" \
"\t" __stringify(SC_BEQZ) " %0, 1b \n" \
" " #asm_op " %0, %1, %3 \n" \
" .set pop \n" \
: "=&r" (result), "=&r" (temp), \
@ -137,7 +136,7 @@ arch_##pfx##_fetch_##op##_relaxed(type i, pfx##_t * v) \
"1: " #ll " %1, %2 # " #pfx "_fetch_" #op "\n" \
" " #asm_op " %0, %1, %3 \n" \
" " #sc " %0, %2 \n" \
"\t" __SC_BEQZ "%0, 1b \n" \
"\t" __stringify(SC_BEQZ) " %0, 1b \n" \
" .set pop \n" \
" move %0, %1 \n" \
: "=&r" (result), "=&r" (temp), \
@ -237,7 +236,7 @@ static __inline__ type arch_##pfx##_sub_if_positive(type i, pfx##_t * v) \
" .set push \n" \
" .set " MIPS_ISA_LEVEL " \n" \
" " #sc " %1, %2 \n" \
" " __SC_BEQZ "%1, 1b \n" \
" " __stringify(SC_BEQZ) " %1, 1b \n" \
"2: " __SYNC(full, loongson3_war) " \n" \
" .set pop \n" \
: "=&r" (result), "=&r" (temp), \

24
arch/mips/include/asm/bitops.h
View file

@ -16,14 +16,12 @@
#include <linux/bits.h>
#include <linux/compiler.h>
#include <linux/types.h>
#include <asm/asm.h>
#include <asm/barrier.h>
#include <asm/byteorder.h> /* sigh ... */
#include <asm/compiler.h>
#include <asm/cpu-features.h>
#include <asm/isa-rev.h>
#include <asm/llsc.h>
#include <asm/sgidefs.h>
#include <asm/war.h>
#define __bit_op(mem, insn, inputs...) do { \
unsigned long __temp; \
@ -32,10 +30,10 @@
" .set push \n" \
" .set " MIPS_ISA_LEVEL " \n" \
" " __SYNC(full, loongson3_war) " \n" \
"1: " __LL "%0, %1 \n" \
"1: " __stringify(LONG_LL) " %0, %1 \n" \
" " insn " \n" \
" " __SC "%0, %1 \n" \
" " __SC_BEQZ "%0, 1b \n" \
" " __stringify(LONG_SC) " %0, %1 \n" \
" " __stringify(SC_BEQZ) " %0, 1b \n" \
" .set pop \n" \
: "=&r"(__temp), "+" GCC_OFF_SMALL_ASM()(mem) \
: inputs \
@ -49,10 +47,10 @@
" .set push \n" \
" .set " MIPS_ISA_LEVEL " \n" \
" " __SYNC(full, loongson3_war) " \n" \
"1: " __LL ll_dst ", %2 \n" \
"1: " __stringify(LONG_LL) " " ll_dst ", %2\n" \
" " insn " \n" \
" " __SC "%1, %2 \n" \
" " __SC_BEQZ "%1, 1b \n" \
" " __stringify(LONG_SC) " %1, %2 \n" \
" " __stringify(SC_BEQZ) " %1, 1b \n" \
" .set pop \n" \
: "=&r"(__orig), "=&r"(__temp), \
"+" GCC_OFF_SMALL_ASM()(mem) \
@ -98,7 +96,7 @@ static inline void set_bit(unsigned long nr, volatile unsigned long *addr)
}
if ((MIPS_ISA_REV >= 2) && __builtin_constant_p(bit) && (bit >= 16)) {
__bit_op(*m, __INS "%0, %3, %2, 1", "i"(bit), "r"(~0));
__bit_op(*m, __stringify(LONG_INS) " %0, %3, %2, 1", "i"(bit), "r"(~0));
return;
}
@ -126,7 +124,7 @@ static inline void clear_bit(unsigned long nr, volatile unsigned long *addr)
}
if ((MIPS_ISA_REV >= 2) && __builtin_constant_p(bit)) {
__bit_op(*m, __INS "%0, $0, %2, 1", "i"(bit));
__bit_op(*m, __stringify(LONG_INS) " %0, $0, %2, 1", "i"(bit));
return;
}
@ -234,8 +232,8 @@ static inline int test_and_clear_bit(unsigned long nr,
res = __mips_test_and_clear_bit(nr, addr);
} else if ((MIPS_ISA_REV >= 2) && __builtin_constant_p(nr)) {
res = __test_bit_op(*m, "%1",
__EXT "%0, %1, %3, 1;"
__INS "%1, $0, %3, 1",
__stringify(LONG_EXT) " %0, %1, %3, 1;"
__stringify(LONG_INS) " %1, $0, %3, 1",
"i"(bit));
} else {
orig = __test_bit_op(*m, "%0",

9
arch/mips/include/asm/cmpxchg.h
View file

@ -10,10 +10,9 @@
#include <linux/bug.h>
#include <linux/irqflags.h>
#include <asm/asm.h>
#include <asm/compiler.h>
#include <asm/llsc.h>
#include <asm/sync.h>
#include <asm/war.h>
/*
* These functions doesn't exist, so if they are called you'll either:
@ -48,7 +47,7 @@ extern unsigned long __xchg_called_with_bad_pointer(void)
" move $1, %z3 \n" \
" .set " MIPS_ISA_ARCH_LEVEL " \n" \
" " st " $1, %1 \n" \
"\t" __SC_BEQZ "$1, 1b \n" \
"\t" __stringify(SC_BEQZ) " $1, 1b \n" \
" .set pop \n" \
: "=&r" (__ret), "=" GCC_OFF_SMALL_ASM() (*m) \
: GCC_OFF_SMALL_ASM() (*m), "Jr" (val) \
@ -127,7 +126,7 @@ unsigned long __xchg(volatile void *ptr, unsigned long x, int size)
" move $1, %z4 \n" \
" .set "MIPS_ISA_ARCH_LEVEL" \n" \
" " st " $1, %1 \n" \
"\t" __SC_BEQZ "$1, 1b \n" \
"\t" __stringify(SC_BEQZ) " $1, 1b \n" \
" .set pop \n" \
"2: " __SYNC(full, loongson3_war) " \n" \
: "=&r" (__ret), "=" GCC_OFF_SMALL_ASM() (*m) \
@ -282,7 +281,7 @@ static inline unsigned long __cmpxchg64(volatile void *ptr,
/* Attempt to store new at ptr */
" scd %L1, %2 \n"
/* If we failed, loop! */
"\t" __SC_BEQZ "%L1, 1b \n"
"\t" __stringify(SC_BEQZ) " %L1, 1b \n"
"2: " __SYNC(full, loongson3_war) " \n"
" .set pop \n"
: "=&r"(ret),

13
arch/mips/include/asm/kvm_host.h
View file

@ -20,6 +20,7 @@
#include <linux/threads.h>
#include <linux/spinlock.h>
#include <asm/asm.h>
#include <asm/inst.h>
#include <asm/mipsregs.h>
@ -379,9 +380,9 @@ static inline void _kvm_atomic_set_c0_guest_reg(unsigned long *reg,
__asm__ __volatile__(
" .set push \n"
" .set "MIPS_ISA_ARCH_LEVEL" \n"
" " __LL "%0, %1 \n"
" "__stringify(LONG_LL) " %0, %1 \n"
" or %0, %2 \n"
" " __SC "%0, %1 \n"
" "__stringify(LONG_SC) " %0, %1 \n"
" .set pop \n"
: "=&r" (temp), "+m" (*reg)
: "r" (val));
@ -396,9 +397,9 @@ static inline void _kvm_atomic_clear_c0_guest_reg(unsigned long *reg,
__asm__ __volatile__(
" .set push \n"
" .set "MIPS_ISA_ARCH_LEVEL" \n"
" " __LL "%0, %1 \n"
" "__stringify(LONG_LL) " %0, %1 \n"
" and %0, %2 \n"
" " __SC "%0, %1 \n"
" "__stringify(LONG_SC) " %0, %1 \n"
" .set pop \n"
: "=&r" (temp), "+m" (*reg)
: "r" (~val));
@ -414,10 +415,10 @@ static inline void _kvm_atomic_change_c0_guest_reg(unsigned long *reg,
__asm__ __volatile__(
" .set push \n"
" .set "MIPS_ISA_ARCH_LEVEL" \n"
" " __LL "%0, %1 \n"
" "__stringify(LONG_LL) " %0, %1 \n"
" and %0, %2 \n"
" or %0, %3 \n"
" " __SC "%0, %1 \n"
" "__stringify(LONG_SC) " %0, %1 \n"
" .set pop \n"
: "=&r" (temp), "+m" (*reg)
: "r" (~change), "r" (val & change));

39
arch/mips/include/asm/llsc.h
View file

@ -1,39 +0,0 @@
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Macros for 32/64-bit neutral inline assembler
*/
#ifndef __ASM_LLSC_H
#define __ASM_LLSC_H
#include <asm/isa-rev.h>
#if _MIPS_SZLONG == 32
#define __LL "ll "
#define __SC "sc "
#define __INS "ins "
#define __EXT "ext "
#elif _MIPS_SZLONG == 64
#define __LL "lld "
#define __SC "scd "
#define __INS "dins "
#define __EXT "dext "
#endif
/*
* Using a branch-likely instruction to check the result of an sc instruction
* works around a bug present in R10000 CPUs prior to revision 3.0 that could
* cause ll-sc sequences to execute non-atomically.
*/
#ifdef CONFIG_WAR_R10000_LLSC
# define __SC_BEQZ "beqzl "
#elif MIPS_ISA_REV >= 6
# define __SC_BEQZ "beqzc "
#else
# define __SC_BEQZ "beqz "
#endif
#endif /* __ASM_LLSC_H */