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sh: Have SH-5 provide an {en,dis}able_fpu() impl.

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Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2007-11-10 20:27:03 +09:00
parent 27a511c6f3
commit 256b22ca66
3 changed files with 21 additions and 10 deletions
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8
arch/sh/kernel/ptrace_64.c
View File

@ -74,9 +74,9 @@ get_fpu_long(struct task_struct *task, unsigned long addr)
} }
if (last_task_used_math == task) { if (last_task_used_math == task) {
grab_fpu(); enable_fpu();
fpsave(&task->thread.fpu.hard); fpsave(&task->thread.fpu.hard);
release_fpu(); disable_fpu();
last_task_used_math = 0; last_task_used_math = 0;
regs->sr |= SR_FD; regs->sr |= SR_FD;
} }
@ -110,9 +110,9 @@ put_fpu_long(struct task_struct *task, unsigned long addr, unsigned long data)
fpinit(&task->thread.fpu.hard); fpinit(&task->thread.fpu.hard);
set_stopped_child_used_math(task); set_stopped_child_used_math(task);
} else if (last_task_used_math == task) { } else if (last_task_used_math == task) {
grab_fpu(); enable_fpu();
fpsave(&task->thread.fpu.hard); fpsave(&task->thread.fpu.hard);
release_fpu(); disable_fpu();
last_task_used_math = 0; last_task_used_math = 0;
regs->sr |= SR_FD; regs->sr |= SR_FD;
} }

8
arch/sh/kernel/traps_64.c
View File

@ -617,9 +617,9 @@ static int misaligned_fpu_load(struct pt_regs *regs,
context switch the registers into memory so they can be context switch the registers into memory so they can be
indexed by register number. */ indexed by register number. */
if (last_task_used_math == current) { if (last_task_used_math == current) {
grab_fpu(); enable_fpu();
fpsave(&current->thread.fpu.hard); fpsave(&current->thread.fpu.hard);
release_fpu(); disable_fpu();
last_task_used_math = NULL; last_task_used_math = NULL;
regs->sr |= SR_FD; regs->sr |= SR_FD;
} }
@ -690,9 +690,9 @@ static int misaligned_fpu_store(struct pt_regs *regs,
context switch the registers into memory so they can be context switch the registers into memory so they can be
indexed by register number. */ indexed by register number. */
if (last_task_used_math == current) { if (last_task_used_math == current) {
grab_fpu(); enable_fpu();
fpsave(&current->thread.fpu.hard); fpsave(&current->thread.fpu.hard);
release_fpu(); disable_fpu();
last_task_used_math = NULL; last_task_used_math = NULL;
regs->sr |= SR_FD; regs->sr |= SR_FD;
} }

15
include/asm-sh/processor_64.h
View File

@ -18,6 +18,7 @@
#include <asm/page.h> #include <asm/page.h>
#include <asm/types.h> #include <asm/types.h>
#include <asm/cache.h> #include <asm/cache.h>
#include <asm/ptrace.h>
#include <asm/cpu/registers.h> #include <asm/cpu/registers.h>
/* /*
@ -218,7 +219,7 @@ extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
* FPU lazy state save handling. * FPU lazy state save handling.
*/ */
static inline void release_fpu(void) static inline void disable_fpu(void)
{ {
unsigned long long __dummy; unsigned long long __dummy;
@ -230,7 +231,7 @@ static inline void release_fpu(void)
: "r" (SR_FD)); : "r" (SR_FD));
} }
static inline void grab_fpu(void) static inline void enable_fpu(void)
{ {
unsigned long long __dummy; unsigned long long __dummy;
@ -242,6 +243,16 @@ static inline void grab_fpu(void)
: "r" (~SR_FD)); : "r" (~SR_FD));
} }
static inline void release_fpu(struct pt_regs *regs)
{
regs->sr |= SR_FD;
}
static inline void grab_fpu(struct pt_regs *regs)
{
regs->sr &= ~SR_FD;
}
/* Round to nearest, no exceptions on inexact, overflow, underflow, /* Round to nearest, no exceptions on inexact, overflow, underflow,
zero-divide, invalid. Configure option for whether to flush denorms to zero-divide, invalid. Configure option for whether to flush denorms to
zero, or except if a denorm is encountered. */ zero, or except if a denorm is encountered. */