mirror of https://gitee.com/openkylin/linux.git
sh64: Use the shared FPU state restorer.
This kills off the sh64-specific state restorer and switches over to the generic one. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
parent
88ea1a445a
commit
d6db8888c8
|
@ -1124,7 +1124,7 @@ fpu_error_or_IRQA:
|
|||
pta its_IRQ, tr0
|
||||
beqi/l r4, EVENT_INTERRUPT, tr0
|
||||
#ifdef CONFIG_SH_FPU
|
||||
movi do_fpu_state_restore, r6
|
||||
movi fpu_state_restore_trap_handler, r6
|
||||
#else
|
||||
movi do_exception_error, r6
|
||||
#endif
|
||||
|
@ -1135,7 +1135,7 @@ fpu_error_or_IRQB:
|
|||
pta its_IRQ, tr0
|
||||
beqi/l r4, EVENT_INTERRUPT, tr0
|
||||
#ifdef CONFIG_SH_FPU
|
||||
movi do_fpu_state_restore, r6
|
||||
movi fpu_state_restore_trap_handler, r6
|
||||
#else
|
||||
movi do_exception_error, r6
|
||||
#endif
|
||||
|
|
|
@ -15,24 +15,6 @@
|
|||
#include <linux/sched.h>
|
||||
#include <linux/signal.h>
|
||||
#include <asm/processor.h>
|
||||
#include <asm/user.h>
|
||||
#include <asm/io.h>
|
||||
#include <asm/fpu.h>
|
||||
|
||||
/*
|
||||
* Initially load the FPU with signalling NANS. This bit pattern
|
||||
* has the property that no matter whether considered as single or as
|
||||
* double precision, it still represents a signalling NAN.
|
||||
*/
|
||||
#define sNAN64 0xFFFFFFFFFFFFFFFFULL
|
||||
#define sNAN32 0xFFFFFFFFUL
|
||||
|
||||
static union thread_xstate init_fpuregs = {
|
||||
.hardfpu = {
|
||||
.fp_regs = { [0 ... 63] = sNAN32 },
|
||||
.fpscr = FPSCR_INIT
|
||||
}
|
||||
};
|
||||
|
||||
void save_fpu(struct task_struct *tsk)
|
||||
{
|
||||
|
@ -76,8 +58,7 @@ void save_fpu(struct task_struct *tsk)
|
|||
: "memory");
|
||||
}
|
||||
|
||||
static inline void
|
||||
fpload(struct sh_fpu_hard_struct *fpregs)
|
||||
void restore_fpu(struct task_struct *tsk)
|
||||
{
|
||||
asm volatile("fld.p %0, (0*8), fp0\n\t"
|
||||
"fld.p %0, (1*8), fp2\n\t"
|
||||
|
@ -116,16 +97,11 @@ fpload(struct sh_fpu_hard_struct *fpregs)
|
|||
|
||||
"fld.p %0, (31*8), fp62\n\t"
|
||||
: /* no output */
|
||||
: "r" (fpregs) );
|
||||
: "r" (&tsk->thread.xstate->hardfpu)
|
||||
: "memory");
|
||||
}
|
||||
|
||||
void fpinit(struct sh_fpu_hard_struct *fpregs)
|
||||
{
|
||||
*fpregs = init_fpuregs.hardfpu;
|
||||
}
|
||||
|
||||
asmlinkage void
|
||||
do_fpu_error(unsigned long ex, struct pt_regs *regs)
|
||||
asmlinkage void do_fpu_error(unsigned long ex, struct pt_regs *regs)
|
||||
{
|
||||
struct task_struct *tsk = current;
|
||||
|
||||
|
@ -133,35 +109,6 @@ do_fpu_error(unsigned long ex, struct pt_regs *regs)
|
|||
|
||||
tsk->thread.trap_no = 11;
|
||||
tsk->thread.error_code = 0;
|
||||
|
||||
force_sig(SIGFPE, tsk);
|
||||
}
|
||||
|
||||
|
||||
asmlinkage void
|
||||
do_fpu_state_restore(unsigned long ex, struct pt_regs *regs)
|
||||
{
|
||||
void die(const char *str, struct pt_regs *regs, long err);
|
||||
|
||||
if (! user_mode(regs))
|
||||
die("FPU used in kernel", regs, ex);
|
||||
|
||||
regs->sr &= ~SR_FD;
|
||||
|
||||
if (last_task_used_math == current)
|
||||
return;
|
||||
|
||||
enable_fpu();
|
||||
if (last_task_used_math != NULL)
|
||||
/* Other processes fpu state, save away */
|
||||
save_fpu(last_task_used_math);
|
||||
|
||||
last_task_used_math = current;
|
||||
if (used_math()) {
|
||||
fpload(¤t->thread.xstate->hardfpu);
|
||||
} else {
|
||||
/* First time FPU user. */
|
||||
fpload(&init_fpuregs.hardfpu);
|
||||
set_used_math();
|
||||
}
|
||||
disable_fpu();
|
||||
}
|
||||
|
|
|
@ -114,8 +114,7 @@ put_fpu_long(struct task_struct *task, unsigned long addr, unsigned long data)
|
|||
regs = (struct pt_regs*)((unsigned char *)task + THREAD_SIZE) - 1;
|
||||
|
||||
if (!tsk_used_math(task)) {
|
||||
fpinit(&task->thread.xstate->hardfpu);
|
||||
set_stopped_child_used_math(task);
|
||||
init_fpu(task);
|
||||
} else if (last_task_used_math == task) {
|
||||
enable_fpu();
|
||||
save_fpu(task);
|
||||
|
|
Loading…
Reference in New Issue