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>
diff --git a/arch/sh/kernel/cpu/sh5/entry.S b/arch/sh/kernel/cpu/sh5/entry.S
index 8f13f73..36d031c 100644
--- a/arch/sh/kernel/cpu/sh5/entry.S
+++ b/arch/sh/kernel/cpu/sh5/entry.S
@@ -1124,7 +1124,7 @@
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 @@
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
diff --git a/arch/sh/kernel/cpu/sh5/fpu.c b/arch/sh/kernel/cpu/sh5/fpu.c
index 92df285..4b3bb35 100644
--- a/arch/sh/kernel/cpu/sh5/fpu.c
+++ b/arch/sh/kernel/cpu/sh5/fpu.c
@@ -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 @@
: "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 @@
"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 @@
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();
-}
diff --git a/arch/sh/kernel/ptrace_64.c b/arch/sh/kernel/ptrace_64.c
index 67fbcee..23fbd92 100644
--- a/arch/sh/kernel/ptrace_64.c
+++ b/arch/sh/kernel/ptrace_64.c
@@ -114,8 +114,7 @@
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);