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Commit 431ec6ac authored by David S. Miller's avatar David S. Miller
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[SPARC64]: Uninline rwsem assembler.

parent 855fb095
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Showing with 246 additions and 222 deletions
arch/sparc64/lib/Makefile
View file @ 431ec6ac
......@@ -11,4 +11,4 @@ obj-y := PeeCeeI.o blockops.o debuglocks.o strlen.o strncmp.o \
VIScopy.o VISbzero.o VISmemset.o VIScsum.o VIScsumcopy.o \
VIScsumcopyusr.o VISsave.o atomic.o rwlock.o bitops.o \
dec_and_lock.o U3memcpy.o U3copy_from_user.o U3copy_to_user.o \
U3copy_in_user.o mcount.o ipcsum.o
U3copy_in_user.o mcount.o ipcsum.o rwsem.o
arch/sparc64/lib/rwsem.c 0 → 100644
View file @ 431ec6ac
/* rwsem.c: Don't inline expand these suckers all over the place.
*
* Written by David S. Miller (davem@redhat.com), 2001.
* Derived from asm-i386/rwsem.h
*/
#include <linux/kernel.h>
#include <linux/rwsem.h>
#include <linux/module.h>
extern struct rw_semaphore *FASTCALL(rwsem_down_read_failed(struct rw_semaphore *sem));
extern struct rw_semaphore *FASTCALL(rwsem_down_write_failed(struct rw_semaphore *sem));
extern struct rw_semaphore *FASTCALL(rwsem_wake(struct rw_semaphore *));
extern struct rw_semaphore *FASTCALL(rwsem_downgrade_wake(struct rw_semaphore *));
void __down_read(struct rw_semaphore *sem)
{
__asm__ __volatile__(
"! beginning __down_read\n"
"1:\tlduw [%0], %%g5\n\t"
"add %%g5, 1, %%g7\n\t"
"cas [%0], %%g5, %%g7\n\t"
"cmp %%g5, %%g7\n\t"
"bne,pn %%icc, 1b\n\t"
" add %%g7, 1, %%g7\n\t"
"cmp %%g7, 0\n\t"
"bl,pn %%icc, 3f\n\t"
" membar #StoreLoad | #StoreStore\n"
"2:\n\t"
".subsection 2\n"
"3:\tmov %0, %%g5\n\t"
"save %%sp, -160, %%sp\n\t"
"mov %%g1, %%l1\n\t"
"mov %%g2, %%l2\n\t"
"mov %%g3, %%l3\n\t"
"call %1\n\t"
" mov %%g5, %%o0\n\t"
"mov %%l1, %%g1\n\t"
"mov %%l2, %%g2\n\t"
"ba,pt %%xcc, 2b\n\t"
" restore %%l3, %%g0, %%g3\n\t"
".previous\n\t"
"! ending __down_read"
: : "r" (sem), "i" (rwsem_down_read_failed)
: "g5", "g7", "memory", "cc");
}
EXPORT_SYMBOL(__down_read);
int __down_read_trylock(struct rw_semaphore *sem)
{
int result;
__asm__ __volatile__(
"! beginning __down_read_trylock\n"
"1:\tlduw [%1], %%g5\n\t"
"add %%g5, 1, %%g7\n\t"
"cmp %%g7, 0\n\t"
"bl,pn %%icc, 2f\n\t"
" mov 0, %0\n\t"
"cas [%1], %%g5, %%g7\n\t"
"cmp %%g5, %%g7\n\t"
"bne,pn %%icc, 1b\n\t"
" mov 1, %0\n\t"
"membar #StoreLoad | #StoreStore\n"
"2:\n\t"
"! ending __down_read_trylock"
: "=&r" (result)
: "r" (sem)
: "g5", "g7", "memory", "cc");
return result;
}
EXPORT_SYMBOL(__down_read_trylock);
void __down_write(struct rw_semaphore *sem)
{
__asm__ __volatile__(
"! beginning __down_write\n\t"
"sethi %%hi(%2), %%g1\n\t"
"or %%g1, %%lo(%2), %%g1\n"
"1:\tlduw [%0], %%g5\n\t"
"add %%g5, %%g1, %%g7\n\t"
"cas [%0], %%g5, %%g7\n\t"
"cmp %%g5, %%g7\n\t"
"bne,pn %%icc, 1b\n\t"
" cmp %%g7, 0\n\t"
"bne,pn %%icc, 3f\n\t"
" membar #StoreLoad | #StoreStore\n"
"2:\n\t"
".subsection 2\n"
"3:\tmov %0, %%g5\n\t"
"save %%sp, -160, %%sp\n\t"
"mov %%g2, %%l2\n\t"
"mov %%g3, %%l3\n\t"
"call %1\n\t"
" mov %%g5, %%o0\n\t"
"mov %%l2, %%g2\n\t"
"ba,pt %%xcc, 2b\n\t"
" restore %%l3, %%g0, %%g3\n\t"
".previous\n\t"
"! ending __down_write"
: : "r" (sem), "i" (rwsem_down_write_failed),
"i" (RWSEM_ACTIVE_WRITE_BIAS)
: "g1", "g5", "g7", "memory", "cc");
}
EXPORT_SYMBOL(__down_write);
int __down_write_trylock(struct rw_semaphore *sem)
{
int result;
__asm__ __volatile__(
"! beginning __down_write_trylock\n\t"
"sethi %%hi(%2), %%g1\n\t"
"or %%g1, %%lo(%2), %%g1\n"
"1:\tlduw [%1], %%g5\n\t"
"cmp %%g5, 0\n\t"
"bne,pn %%icc, 2f\n\t"
" mov 0, %0\n\t"
"add %%g5, %%g1, %%g7\n\t"
"cas [%1], %%g5, %%g7\n\t"
"cmp %%g5, %%g7\n\t"
"bne,pn %%icc, 1b\n\t"
" mov 1, %0\n\t"
"membar #StoreLoad | #StoreStore\n"
"2:\n\t"
"! ending __down_write_trylock"
: "=&r" (result)
: "r" (sem), "i" (RWSEM_ACTIVE_WRITE_BIAS)
: "g1", "g5", "g7", "memory", "cc");
return result;
}
EXPORT_SYMBOL(__down_write_trylock);
void __up_read(struct rw_semaphore *sem)
{
__asm__ __volatile__(
"! beginning __up_read\n\t"
"1:\tlduw [%0], %%g5\n\t"
"sub %%g5, 1, %%g7\n\t"
"cas [%0], %%g5, %%g7\n\t"
"cmp %%g5, %%g7\n\t"
"bne,pn %%icc, 1b\n\t"
" cmp %%g7, 0\n\t"
"bl,pn %%icc, 3f\n\t"
" membar #StoreLoad | #StoreStore\n"
"2:\n\t"
".subsection 2\n"
"3:\tsethi %%hi(%2), %%g1\n\t"
"sub %%g7, 1, %%g7\n\t"
"or %%g1, %%lo(%2), %%g1\n\t"
"andcc %%g7, %%g1, %%g0\n\t"
"bne,pn %%icc, 2b\n\t"
" mov %0, %%g5\n\t"
"save %%sp, -160, %%sp\n\t"
"mov %%g2, %%l2\n\t"
"mov %%g3, %%l3\n\t"
"call %1\n\t"
" mov %%g5, %%o0\n\t"
"mov %%l2, %%g2\n\t"
"ba,pt %%xcc, 2b\n\t"
" restore %%l3, %%g0, %%g3\n\t"
".previous\n\t"
"! ending __up_read"
: : "r" (sem), "i" (rwsem_wake),
"i" (RWSEM_ACTIVE_MASK)
: "g1", "g5", "g7", "memory", "cc");
}
EXPORT_SYMBOL(__up_read);
void __up_write(struct rw_semaphore *sem)
{
__asm__ __volatile__(
"! beginning __up_write\n\t"
"sethi %%hi(%2), %%g1\n\t"
"or %%g1, %%lo(%2), %%g1\n"
"1:\tlduw [%0], %%g5\n\t"
"sub %%g5, %%g1, %%g7\n\t"
"cas [%0], %%g5, %%g7\n\t"
"cmp %%g5, %%g7\n\t"
"bne,pn %%icc, 1b\n\t"
" sub %%g7, %%g1, %%g7\n\t"
"cmp %%g7, 0\n\t"
"bl,pn %%icc, 3f\n\t"
" membar #StoreLoad | #StoreStore\n"
"2:\n\t"
".subsection 2\n"
"3:\tmov %0, %%g5\n\t"
"save %%sp, -160, %%sp\n\t"
"mov %%g2, %%l2\n\t"
"mov %%g3, %%l3\n\t"
"call %1\n\t"
" mov %%g5, %%o0\n\t"
"mov %%l2, %%g2\n\t"
"ba,pt %%xcc, 2b\n\t"
" restore %%l3, %%g0, %%g3\n\t"
".previous\n\t"
"! ending __up_write"
: : "r" (sem), "i" (rwsem_wake),
"i" (RWSEM_ACTIVE_WRITE_BIAS)
: "g1", "g5", "g7", "memory", "cc");
}
EXPORT_SYMBOL(__up_write);
void __downgrade_write(struct rw_semaphore *sem)
{
__asm__ __volatile__(
"! beginning __downgrade_write\n\t"
"sethi %%hi(%2), %%g1\n\t"
"or %%g1, %%lo(%2), %%g1\n"
"1:\tlduw [%0], %%g5\n\t"
"sub %%g5, %%g1, %%g7\n\t"
"cas [%0], %%g5, %%g7\n\t"
"cmp %%g5, %%g7\n\t"
"bne,pn %%icc, 1b\n\t"
" sub %%g7, %%g1, %%g7\n\t"
"cmp %%g7, 0\n\t"
"bl,pn %%icc, 3f\n\t"
" membar #StoreLoad | #StoreStore\n"
"2:\n\t"
".subsection 2\n"
"3:\tmov %0, %%g5\n\t"
"save %%sp, -160, %%sp\n\t"
"mov %%g2, %%l2\n\t"
"mov %%g3, %%l3\n\t"
"call %1\n\t"
" mov %%g5, %%o0\n\t"
"mov %%l2, %%g2\n\t"
"ba,pt %%xcc, 2b\n\t"
" restore %%l3, %%g0, %%g3\n\t"
".previous\n\t"
"! ending __up_write"
: : "r" (sem), "i" (rwsem_downgrade_wake),
"i" (RWSEM_WAITING_BIAS)
: "g1", "g5", "g7", "memory", "cc");
}
EXPORT_SYMBOL(__downgrade_write);
include/asm-sparc64/rwsem.h
View file @ 431ec6ac
......@@ -18,11 +18,6 @@
struct rwsem_waiter;
extern struct rw_semaphore *FASTCALL(rwsem_down_read_failed(struct rw_semaphore *sem));
extern struct rw_semaphore *FASTCALL(rwsem_down_write_failed(struct rw_semaphore *sem));
extern struct rw_semaphore *FASTCALL(rwsem_wake(struct rw_semaphore *));
extern struct rw_semaphore *FASTCALL(rwsem_downgrade_wake(struct rw_semaphore *));
struct rw_semaphore {
signed int count;
#define RWSEM_UNLOCKED_VALUE 0x00000000
......@@ -48,222 +43,13 @@ static __inline__ void init_rwsem(struct rw_semaphore *sem)
INIT_LIST_HEAD(&sem->wait_list);
}
static __inline__ void __down_read(struct rw_semaphore *sem)
{
__asm__ __volatile__(
"! beginning __down_read\n"
"1:\tlduw [%0], %%g5\n\t"
"add %%g5, 1, %%g7\n\t"
"cas [%0], %%g5, %%g7\n\t"
"cmp %%g5, %%g7\n\t"
"bne,pn %%icc, 1b\n\t"
" add %%g7, 1, %%g7\n\t"
"cmp %%g7, 0\n\t"
"bl,pn %%icc, 3f\n\t"
" membar #StoreLoad | #StoreStore\n"
"2:\n\t"
".subsection 2\n"
"3:\tmov %0, %%g5\n\t"
"save %%sp, -160, %%sp\n\t"
"mov %%g1, %%l1\n\t"
"mov %%g2, %%l2\n\t"
"mov %%g3, %%l3\n\t"
"call %1\n\t"
" mov %%g5, %%o0\n\t"
"mov %%l1, %%g1\n\t"
"mov %%l2, %%g2\n\t"
"ba,pt %%xcc, 2b\n\t"
" restore %%l3, %%g0, %%g3\n\t"
".previous\n\t"
"! ending __down_read"
: : "r" (sem), "i" (rwsem_down_read_failed)
: "g5", "g7", "memory", "cc");
}
static __inline__ int __down_read_trylock(struct rw_semaphore *sem)
{
int result;
__asm__ __volatile__(
"! beginning __down_read_trylock\n"
"1:\tlduw [%1], %%g5\n\t"
"add %%g5, 1, %%g7\n\t"
"cmp %%g7, 0\n\t"
"bl,pn %%icc, 2f\n\t"
" mov 0, %0\n\t"
"cas [%1], %%g5, %%g7\n\t"
"cmp %%g5, %%g7\n\t"
"bne,pn %%icc, 1b\n\t"
" mov 1, %0\n\t"
"membar #StoreLoad | #StoreStore\n"
"2:\n\t"
"! ending __down_read_trylock"
: "=&r" (result)
: "r" (sem)
: "g5", "g7", "memory", "cc");
return result;
}
static __inline__ void __down_write(struct rw_semaphore *sem)
{
__asm__ __volatile__(
"! beginning __down_write\n\t"
"sethi %%hi(%2), %%g1\n\t"
"or %%g1, %%lo(%2), %%g1\n"
"1:\tlduw [%0], %%g5\n\t"
"add %%g5, %%g1, %%g7\n\t"
"cas [%0], %%g5, %%g7\n\t"
"cmp %%g5, %%g7\n\t"
"bne,pn %%icc, 1b\n\t"
" cmp %%g7, 0\n\t"
"bne,pn %%icc, 3f\n\t"
" membar #StoreLoad | #StoreStore\n"
"2:\n\t"
".subsection 2\n"
"3:\tmov %0, %%g5\n\t"
"save %%sp, -160, %%sp\n\t"
"mov %%g2, %%l2\n\t"
"mov %%g3, %%l3\n\t"
"call %1\n\t"
" mov %%g5, %%o0\n\t"
"mov %%l2, %%g2\n\t"
"ba,pt %%xcc, 2b\n\t"
" restore %%l3, %%g0, %%g3\n\t"
".previous\n\t"
"! ending __down_write"
: : "r" (sem), "i" (rwsem_down_write_failed),
"i" (RWSEM_ACTIVE_WRITE_BIAS)
: "g1", "g5", "g7", "memory", "cc");
}
static __inline__ int __down_write_trylock(struct rw_semaphore *sem)
{
int result;
__asm__ __volatile__(
"! beginning __down_write_trylock\n\t"
"sethi %%hi(%2), %%g1\n\t"
"or %%g1, %%lo(%2), %%g1\n"
"1:\tlduw [%1], %%g5\n\t"
"cmp %%g5, 0\n\t"
"bne,pn %%icc, 2f\n\t"
" mov 0, %0\n\t"
"add %%g5, %%g1, %%g7\n\t"
"cas [%1], %%g5, %%g7\n\t"
"cmp %%g5, %%g7\n\t"
"bne,pn %%icc, 1b\n\t"
" mov 1, %0\n\t"
"membar #StoreLoad | #StoreStore\n"
"2:\n\t"
"! ending __down_write_trylock"
: "=&r" (result)
: "r" (sem), "i" (RWSEM_ACTIVE_WRITE_BIAS)
: "g1", "g5", "g7", "memory", "cc");
return result;
}
static __inline__ void __up_read(struct rw_semaphore *sem)
{
__asm__ __volatile__(
"! beginning __up_read\n\t"
"1:\tlduw [%0], %%g5\n\t"
"sub %%g5, 1, %%g7\n\t"
"cas [%0], %%g5, %%g7\n\t"
"cmp %%g5, %%g7\n\t"
"bne,pn %%icc, 1b\n\t"
" cmp %%g7, 0\n\t"
"bl,pn %%icc, 3f\n\t"
" membar #StoreLoad | #StoreStore\n"
"2:\n\t"
".subsection 2\n"
"3:\tsethi %%hi(%2), %%g1\n\t"
"sub %%g7, 1, %%g7\n\t"
"or %%g1, %%lo(%2), %%g1\n\t"
"andcc %%g7, %%g1, %%g0\n\t"
"bne,pn %%icc, 2b\n\t"
" mov %0, %%g5\n\t"
"save %%sp, -160, %%sp\n\t"
"mov %%g2, %%l2\n\t"
"mov %%g3, %%l3\n\t"
"call %1\n\t"
" mov %%g5, %%o0\n\t"
"mov %%l2, %%g2\n\t"
"ba,pt %%xcc, 2b\n\t"
" restore %%l3, %%g0, %%g3\n\t"
".previous\n\t"
"! ending __up_read"
: : "r" (sem), "i" (rwsem_wake),
"i" (RWSEM_ACTIVE_MASK)
: "g1", "g5", "g7", "memory", "cc");
}
static __inline__ void __up_write(struct rw_semaphore *sem)
{
__asm__ __volatile__(
"! beginning __up_write\n\t"
"sethi %%hi(%2), %%g1\n\t"
"or %%g1, %%lo(%2), %%g1\n"
"1:\tlduw [%0], %%g5\n\t"
"sub %%g5, %%g1, %%g7\n\t"
"cas [%0], %%g5, %%g7\n\t"
"cmp %%g5, %%g7\n\t"
"bne,pn %%icc, 1b\n\t"
" sub %%g7, %%g1, %%g7\n\t"
"cmp %%g7, 0\n\t"
"bl,pn %%icc, 3f\n\t"
" membar #StoreLoad | #StoreStore\n"
"2:\n\t"
".subsection 2\n"
"3:\tmov %0, %%g5\n\t"
"save %%sp, -160, %%sp\n\t"
"mov %%g2, %%l2\n\t"
"mov %%g3, %%l3\n\t"
"call %1\n\t"
" mov %%g5, %%o0\n\t"
"mov %%l2, %%g2\n\t"
"ba,pt %%xcc, 2b\n\t"
" restore %%l3, %%g0, %%g3\n\t"
".previous\n\t"
"! ending __up_write"
: : "r" (sem), "i" (rwsem_wake),
"i" (RWSEM_ACTIVE_WRITE_BIAS)
: "g1", "g5", "g7", "memory", "cc");
}
static __inline__ void __downgrade_write(struct rw_semaphore *sem)
{
__asm__ __volatile__(
"! beginning __up_write\n\t"
"sethi %%hi(%2), %%g1\n\t"
"or %%g1, %%lo(%2), %%g1\n"
"1:\tlduw [%0], %%g5\n\t"
"sub %%g5, %%g1, %%g7\n\t"
"cas [%0], %%g5, %%g7\n\t"
"cmp %%g5, %%g7\n\t"
"bne,pn %%icc, 1b\n\t"
" sub %%g7, %%g1, %%g7\n\t"
"cmp %%g7, 0\n\t"
"bl,pn %%icc, 3f\n\t"
" membar #StoreLoad | #StoreStore\n"
"2:\n\t"
".subsection 2\n"
"3:\tmov %0, %%g5\n\t"
"save %%sp, -160, %%sp\n\t"
"mov %%g2, %%l2\n\t"
"mov %%g3, %%l3\n\t"
"call %1\n\t"
" mov %%g5, %%o0\n\t"
"mov %%l2, %%g2\n\t"
"ba,pt %%xcc, 2b\n\t"
" restore %%l3, %%g0, %%g3\n\t"
".previous\n\t"
"! ending __up_write"
: : "r" (sem), "i" (rwsem_downgrade_wake),
"i" (RWSEM_WAITING_BIAS)
: "g1", "g5", "g7", "memory", "cc");
}
extern void __down_read(struct rw_semaphore *sem);
extern int __down_read_trylock(struct rw_semaphore *sem);
extern void __down_write(struct rw_semaphore *sem);
extern int __down_write_trylock(struct rw_semaphore *sem);
extern void __up_read(struct rw_semaphore *sem);
extern void __up_write(struct rw_semaphore *sem);
extern void __downgrade_write(struct rw_semaphore *sem);
static __inline__ int rwsem_atomic_update(int delta, struct rw_semaphore *sem)
{
......
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