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-rw-r--r--arch/powerpc/kernel/Makefile5
-rw-r--r--arch/powerpc/kernel/fpu.S31
-rw-r--r--arch/powerpc/kernel/misc_32.S27
-rw-r--r--arch/powerpc/kernel/misc_64.S19
-rw-r--r--arch/powerpc/kernel/process.c2
-rw-r--r--arch/powerpc/kernel/signal_32.c2
-rw-r--r--arch/powerpc/kernel/traps.c2
-rw-r--r--arch/ppc/kernel/align.c4
-rw-r--r--arch/ppc/kernel/misc.S27
-rw-r--r--arch/ppc/kernel/process.c2
-rw-r--r--arch/ppc/kernel/traps.c2
-rw-r--r--arch/ppc/math-emu/sfp-machine.h2
-rw-r--r--arch/ppc64/Kconfig3
-rw-r--r--arch/ppc64/Makefile1
-rw-r--r--arch/ppc64/kernel/align.c4
-rw-r--r--arch/ppc64/kernel/head.S59
-rw-r--r--arch/ppc64/kernel/misc.S51
-rw-r--r--arch/ppc64/kernel/signal.c2
18 files changed, 47 insertions, 198 deletions
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index a733347964a..94cf917b785 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -29,7 +29,6 @@ extra-$(CONFIG_44x) := head_44x.o
extra-$(CONFIG_FSL_BOOKE) := head_fsl_booke.o
extra-$(CONFIG_8xx) := head_8xx.o
extra-$(CONFIG_PPC64) += entry_64.o
-extra-$(CONFIG_PPC_FPU) += fpu.o
extra-y += vmlinux.lds
obj-y += process.o init_task.o time.o \
@@ -49,7 +48,7 @@ else
# stuff used from here for ARCH=ppc or ARCH=ppc64
obj-$(CONFIG_PPC64) += traps.o process.o init_task.o time.o
-fpux-$(CONFIG_PPC32) += fpu.o
-extra-$(CONFIG_PPC_FPU) += $(fpux-y)
endif
+
+extra-$(CONFIG_PPC_FPU) += fpu.o
diff --git a/arch/powerpc/kernel/fpu.S b/arch/powerpc/kernel/fpu.S
index 563d445ff58..51fd78da25b 100644
--- a/arch/powerpc/kernel/fpu.S
+++ b/arch/powerpc/kernel/fpu.S
@@ -48,7 +48,7 @@ _GLOBAL(load_up_fpu)
addi r4,r4,THREAD /* want last_task_used_math->thread */
SAVE_32FPRS(0, r4)
mffs fr0
- stfd fr0,THREAD_FPSCR-4(r4)
+ stfd fr0,THREAD_FPSCR(r4)
LDL r5,PT_REGS(r4)
tophys(r5,r5)
LDL r4,_MSR-STACK_FRAME_OVERHEAD(r5)
@@ -71,7 +71,7 @@ _GLOBAL(load_up_fpu)
or r12,r12,r4
std r12,_MSR(r1)
#endif
- lfd fr0,THREAD_FPSCR-4(r5)
+ lfd fr0,THREAD_FPSCR(r5)
mtfsf 0xff,fr0
REST_32FPRS(0, r5)
#ifndef CONFIG_SMP
@@ -104,7 +104,7 @@ _GLOBAL(giveup_fpu)
CMPI 0,r5,0
SAVE_32FPRS(0, r3)
mffs fr0
- stfd fr0,THREAD_FPSCR-4(r3)
+ stfd fr0,THREAD_FPSCR(r3)
beq 1f
LDL r4,_MSR-STACK_FRAME_OVERHEAD(r5)
li r3,MSR_FP|MSR_FE0|MSR_FE1
@@ -117,3 +117,28 @@ _GLOBAL(giveup_fpu)
STL r5,OFF(last_task_used_math)(r4)
#endif /* CONFIG_SMP */
blr
+
+/*
+ * These are used in the alignment trap handler when emulating
+ * single-precision loads and stores.
+ * We restore and save the fpscr so the task gets the same result
+ * and exceptions as if the cpu had performed the load or store.
+ */
+
+_GLOBAL(cvt_fd)
+ lfd 0,THREAD_FPSCR(r5) /* load up fpscr value */
+ mtfsf 0xff,0
+ lfs 0,0(r3)
+ stfd 0,0(r4)
+ mffs 0
+ stfd 0,THREAD_FPSCR(r5) /* save new fpscr value */
+ blr
+
+_GLOBAL(cvt_df)
+ lfd 0,THREAD_FPSCR(r5) /* load up fpscr value */
+ mtfsf 0xff,0
+ lfd 0,0(r3)
+ stfs 0,0(r4)
+ mffs 0
+ stfd 0,THREAD_FPSCR(r5) /* save new fpscr value */
+ blr
diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S
index 303229b090b..3bedb532aed 100644
--- a/arch/powerpc/kernel/misc_32.S
+++ b/arch/powerpc/kernel/misc_32.S
@@ -993,33 +993,6 @@ _GLOBAL(_get_SP)
blr
/*
- * These are used in the alignment trap handler when emulating
- * single-precision loads and stores.
- * We restore and save the fpscr so the task gets the same result
- * and exceptions as if the cpu had performed the load or store.
- */
-
-#ifdef CONFIG_PPC_FPU
-_GLOBAL(cvt_fd)
- lfd 0,-4(r5) /* load up fpscr value */
- mtfsf 0xff,0
- lfs 0,0(r3)
- stfd 0,0(r4)
- mffs 0 /* save new fpscr value */
- stfd 0,-4(r5)
- blr
-
-_GLOBAL(cvt_df)
- lfd 0,-4(r5) /* load up fpscr value */
- mtfsf 0xff,0
- lfd 0,0(r3)
- stfs 0,0(r4)
- mffs 0 /* save new fpscr value */
- stfd 0,-4(r5)
- blr
-#endif
-
-/*
* Create a kernel thread
* kernel_thread(fn, arg, flags)
*/
diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S
index 4775bed42ca..b3e95ff0dba 100644
--- a/arch/powerpc/kernel/misc_64.S
+++ b/arch/powerpc/kernel/misc_64.S
@@ -462,25 +462,6 @@ _GLOBAL(_outsl_ns)
sync
blr
-
-_GLOBAL(cvt_fd)
- lfd 0,0(r5) /* load up fpscr value */
- mtfsf 0xff,0
- lfs 0,0(r3)
- stfd 0,0(r4)
- mffs 0 /* save new fpscr value */
- stfd 0,0(r5)
- blr
-
-_GLOBAL(cvt_df)
- lfd 0,0(r5) /* load up fpscr value */
- mtfsf 0xff,0
- lfd 0,0(r3)
- stfs 0,0(r4)
- mffs 0 /* save new fpscr value */
- stfd 0,0(r5)
- blr
-
/*
* identify_cpu and calls setup_cpu
* In: r3 = base of the cpu_specs array
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 047da1ae21f..8f85dabe4df 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -665,7 +665,7 @@ void start_thread(struct pt_regs *regs, unsigned long start, unsigned long sp)
#endif
#endif /* CONFIG_SMP */
memset(current->thread.fpr, 0, sizeof(current->thread.fpr));
- current->thread.fpscr = 0;
+ current->thread.fpscr.val = 0;
#ifdef CONFIG_ALTIVEC
memset(current->thread.vr, 0, sizeof(current->thread.vr));
memset(&current->thread.vscr, 0, sizeof(current->thread.vscr));
diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c
index 92452b2db26..444c3e81884 100644
--- a/arch/powerpc/kernel/signal_32.c
+++ b/arch/powerpc/kernel/signal_32.c
@@ -403,7 +403,7 @@ static int save_user_regs(struct pt_regs *regs, struct mcontext __user *frame,
ELF_NFPREG * sizeof(double)))
return 1;
- current->thread.fpscr = 0; /* turn off all fp exceptions */
+ current->thread.fpscr.val = 0; /* turn off all fp exceptions */
#ifdef CONFIG_ALTIVEC
/* save altivec registers */
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index f87580382da..5d638ecddbd 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -549,7 +549,7 @@ static void parse_fpe(struct pt_regs *regs)
flush_fp_to_thread(current);
- fpscr = current->thread.fpscr;
+ fpscr = current->thread.fpscr.val;
/* Invalid operation */
if ((fpscr & FPSCR_VE) && (fpscr & FPSCR_VX))
diff --git a/arch/ppc/kernel/align.c b/arch/ppc/kernel/align.c
index ff81da9598d..ab398c4b70b 100644
--- a/arch/ppc/kernel/align.c
+++ b/arch/ppc/kernel/align.c
@@ -375,7 +375,7 @@ fix_alignment(struct pt_regs *regs)
#ifdef CONFIG_PPC_FPU
preempt_disable();
enable_kernel_fp();
- cvt_fd(&data.f, &data.d, &current->thread.fpscr);
+ cvt_fd(&data.f, &data.d, &current->thread);
preempt_enable();
#else
return 0;
@@ -385,7 +385,7 @@ fix_alignment(struct pt_regs *regs)
#ifdef CONFIG_PPC_FPU
preempt_disable();
enable_kernel_fp();
- cvt_df(&data.d, &data.f, &current->thread.fpscr);
+ cvt_df(&data.d, &data.f, &current->thread);
preempt_enable();
#else
return 0;
diff --git a/arch/ppc/kernel/misc.S b/arch/ppc/kernel/misc.S
index 2350f3e09f9..3056ede2424 100644
--- a/arch/ppc/kernel/misc.S
+++ b/arch/ppc/kernel/misc.S
@@ -968,33 +968,6 @@ _GLOBAL(_get_SP)
blr
/*
- * These are used in the alignment trap handler when emulating
- * single-precision loads and stores.
- * We restore and save the fpscr so the task gets the same result
- * and exceptions as if the cpu had performed the load or store.
- */
-
-#ifdef CONFIG_PPC_FPU
-_GLOBAL(cvt_fd)
- lfd 0,-4(r5) /* load up fpscr value */
- mtfsf 0xff,0
- lfs 0,0(r3)
- stfd 0,0(r4)
- mffs 0 /* save new fpscr value */
- stfd 0,-4(r5)
- blr
-
-_GLOBAL(cvt_df)
- lfd 0,-4(r5) /* load up fpscr value */
- mtfsf 0xff,0
- lfd 0,0(r3)
- stfs 0,0(r4)
- mffs 0 /* save new fpscr value */
- stfd 0,-4(r5)
- blr
-#endif
-
-/*
* Create a kernel thread
* kernel_thread(fn, arg, flags)
*/
diff --git a/arch/ppc/kernel/process.c b/arch/ppc/kernel/process.c
index 6d60c40598e..78ea10197a0 100644
--- a/arch/ppc/kernel/process.c
+++ b/arch/ppc/kernel/process.c
@@ -542,7 +542,7 @@ void start_thread(struct pt_regs *regs, unsigned long nip, unsigned long sp)
last_task_used_spe = NULL;
#endif
memset(current->thread.fpr, 0, sizeof(current->thread.fpr));
- current->thread.fpscr = 0;
+ current->thread.fpscr.val = 0;
#ifdef CONFIG_ALTIVEC
memset(current->thread.vr, 0, sizeof(current->thread.vr));
memset(&current->thread.vscr, 0, sizeof(current->thread.vscr));
diff --git a/arch/ppc/kernel/traps.c b/arch/ppc/kernel/traps.c
index 5e4bf88a1ef..f265b81e700 100644
--- a/arch/ppc/kernel/traps.c
+++ b/arch/ppc/kernel/traps.c
@@ -659,7 +659,7 @@ void program_check_exception(struct pt_regs *regs)
giveup_fpu(current);
preempt_enable();
- fpscr = current->thread.fpscr;
+ fpscr = current->thread.fpscr.val;
fpscr &= fpscr << 22; /* mask summary bits with enables */
if (fpscr & FPSCR_VX)
code = FPE_FLTINV;
diff --git a/arch/ppc/math-emu/sfp-machine.h b/arch/ppc/math-emu/sfp-machine.h
index 686e06d2918..4b17d83cfcd 100644
--- a/arch/ppc/math-emu/sfp-machine.h
+++ b/arch/ppc/math-emu/sfp-machine.h
@@ -166,7 +166,7 @@ extern int fp_pack_ds(void *, long, unsigned long, unsigned long, long, long);
#include <linux/kernel.h>
#include <linux/sched.h>
-#define __FPU_FPSCR (current->thread.fpscr)
+#define __FPU_FPSCR (current->thread.fpscr.val)
/* We only actually write to the destination register
* if exceptions signalled (if any) will not trap.
diff --git a/arch/ppc64/Kconfig b/arch/ppc64/Kconfig
index 8cc73cc1b4c..b889277ab7d 100644
--- a/arch/ppc64/Kconfig
+++ b/arch/ppc64/Kconfig
@@ -197,6 +197,9 @@ config BOOTX_TEXT
config POWER4
def_bool y
+config PPC_FPU
+ def_bool y
+
config POWER4_ONLY
bool "Optimize for POWER4"
default n
diff --git a/arch/ppc64/Makefile b/arch/ppc64/Makefile
index 4d18bdb680f..ba59225fd37 100644
--- a/arch/ppc64/Makefile
+++ b/arch/ppc64/Makefile
@@ -80,6 +80,7 @@ endif
CFLAGS += $(call cc-option,-funit-at-a-time)
head-y := arch/ppc64/kernel/head.o
+head-y += arch/powerpc/kernel/fpu.o
libs-y += arch/ppc64/lib/
core-y += arch/ppc64/kernel/ arch/powerpc/kernel/
diff --git a/arch/ppc64/kernel/align.c b/arch/ppc64/kernel/align.c
index 330e7ef8142..256d5b592aa 100644
--- a/arch/ppc64/kernel/align.c
+++ b/arch/ppc64/kernel/align.c
@@ -313,7 +313,7 @@ fix_alignment(struct pt_regs *regs)
/* Doing stfs, have to convert to single */
preempt_disable();
enable_kernel_fp();
- cvt_df(&current->thread.fpr[reg], (float *)&data.v[4], &current->thread.fpscr);
+ cvt_df(&current->thread.fpr[reg], (float *)&data.v[4], &current->thread);
disable_kernel_fp();
preempt_enable();
}
@@ -349,7 +349,7 @@ fix_alignment(struct pt_regs *regs)
/* Doing lfs, have to convert to double */
preempt_disable();
enable_kernel_fp();
- cvt_fd((float *)&data.v[4], &current->thread.fpr[reg], &current->thread.fpscr);
+ cvt_fd((float *)&data.v[4], &current->thread.fpr[reg], &current->thread);
disable_kernel_fp();
preempt_enable();
}
diff --git a/arch/ppc64/kernel/head.S b/arch/ppc64/kernel/head.S
index f58af9c246c..929f9f42cf7 100644
--- a/arch/ppc64/kernel/head.S
+++ b/arch/ppc64/kernel/head.S
@@ -81,7 +81,7 @@ _stext:
_GLOBAL(__start)
/* NOP this out unconditionally */
BEGIN_FTR_SECTION
- b .__start_initialization_multiplatform
+ b .__start_initialization_multiplatform
END_FTR_SECTION(0, 1)
#endif /* CONFIG_PPC_MULTIPLATFORM */
@@ -747,6 +747,7 @@ bad_stack:
* any task or sent any task a signal, you should use
* ret_from_except or ret_from_except_lite instead of this.
*/
+ .globl fast_exception_return
fast_exception_return:
ld r12,_MSR(r1)
ld r11,_NIP(r1)
@@ -858,62 +859,6 @@ fp_unavailable_common:
bl .kernel_fp_unavailable_exception
BUG_OPCODE
-/*
- * load_up_fpu(unused, unused, tsk)
- * Disable FP for the task which had the FPU previously,
- * and save its floating-point registers in its thread_struct.
- * Enables the FPU for use in the kernel on return.
- * On SMP we know the fpu is free, since we give it up every
- * switch (ie, no lazy save of the FP registers).
- * On entry: r13 == 'current' && last_task_used_math != 'current'
- */
-_STATIC(load_up_fpu)
- mfmsr r5 /* grab the current MSR */
- ori r5,r5,MSR_FP
- mtmsrd r5 /* enable use of fpu now */
- isync
-/*
- * For SMP, we don't do lazy FPU switching because it just gets too
- * horrendously complex, especially when a task switches from one CPU
- * to another. Instead we call giveup_fpu in switch_to.
- *
- */
-#ifndef CONFIG_SMP
- ld r3,last_task_used_math@got(r2)
- ld r4,0(r3)
- cmpdi 0,r4,0
- beq 1f
- /* Save FP state to last_task_used_math's THREAD struct */
- addi r4,r4,THREAD
- SAVE_32FPRS(0, r4)
- mffs fr0
- stfd fr0,THREAD_FPSCR(r4)
- /* Disable FP for last_task_used_math */
- ld r5,PT_REGS(r4)
- ld r4,_MSR-STACK_FRAME_OVERHEAD(r5)
- li r6,MSR_FP|MSR_FE0|MSR_FE1
- andc r4,r4,r6
- std r4,_MSR-STACK_FRAME_OVERHEAD(r5)
-1:
-#endif /* CONFIG_SMP */
- /* enable use of FP after return */
- ld r4,PACACURRENT(r13)
- addi r5,r4,THREAD /* Get THREAD */
- ld r4,THREAD_FPEXC_MODE(r5)
- ori r12,r12,MSR_FP
- or r12,r12,r4
- std r12,_MSR(r1)
- lfd fr0,THREAD_FPSCR(r5)
- mtfsf 0xff,fr0
- REST_32FPRS(0, r5)
-#ifndef CONFIG_SMP
- /* Update last_task_used_math to 'current' */
- subi r4,r5,THREAD /* Back to 'current' */
- std r4,0(r3)
-#endif /* CONFIG_SMP */
- /* restore registers and return */
- b fast_exception_return
-
.align 7
.globl altivec_unavailable_common
altivec_unavailable_common:
diff --git a/arch/ppc64/kernel/misc.S b/arch/ppc64/kernel/misc.S
index a33448c2bd9..9cae3d5c40e 100644
--- a/arch/ppc64/kernel/misc.S
+++ b/arch/ppc64/kernel/misc.S
@@ -451,25 +451,6 @@ _GLOBAL(_outsl_ns)
sync
blr
-
-_GLOBAL(cvt_fd)
- lfd 0,0(r5) /* load up fpscr value */
- mtfsf 0xff,0
- lfs 0,0(r3)
- stfd 0,0(r4)
- mffs 0 /* save new fpscr value */
- stfd 0,0(r5)
- blr
-
-_GLOBAL(cvt_df)
- lfd 0,0(r5) /* load up fpscr value */
- mtfsf 0xff,0
- lfd 0,0(r3)
- stfs 0,0(r4)
- mffs 0 /* save new fpscr value */
- stfd 0,0(r5)
- blr
-
/*
* identify_cpu and calls setup_cpu
* In: r3 = base of the cpu_specs array
@@ -655,38 +636,6 @@ _GLOBAL(disable_kernel_fp)
isync
blr
-/*
- * giveup_fpu(tsk)
- * Disable FP for the task given as the argument,
- * and save the floating-point registers in its thread_struct.
- * Enables the FPU for use in the kernel on return.
- */
-_GLOBAL(giveup_fpu)
- mfmsr r5
- ori r5,r5,MSR_FP
- mtmsrd r5 /* enable use of fpu now */
- isync
- cmpdi 0,r3,0
- beqlr- /* if no previous owner, done */
- addi r3,r3,THREAD /* want THREAD of task */
- ld r5,PT_REGS(r3)
- cmpdi 0,r5,0
- SAVE_32FPRS(0, r3)
- mffs fr0
- stfd fr0,THREAD_FPSCR(r3)
- beq 1f
- ld r4,_MSR-STACK_FRAME_OVERHEAD(r5)
- li r3,MSR_FP|MSR_FE0|MSR_FE1
- andc r4,r4,r3 /* disable FP for previous task */
- std r4,_MSR-STACK_FRAME_OVERHEAD(r5)
-1:
-#ifndef CONFIG_SMP
- li r5,0
- ld r4,last_task_used_math@got(r2)
- std r5,0(r4)
-#endif /* CONFIG_SMP */
- blr
-
#ifdef CONFIG_ALTIVEC
#if 0 /* this has no callers for now */
diff --git a/arch/ppc64/kernel/signal.c b/arch/ppc64/kernel/signal.c
index 347112cca3c..ec9d0984b6a 100644
--- a/arch/ppc64/kernel/signal.c
+++ b/arch/ppc64/kernel/signal.c
@@ -133,7 +133,7 @@ static long setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
flush_fp_to_thread(current);
/* Make sure signal doesn't get spurrious FP exceptions */
- current->thread.fpscr = 0;
+ current->thread.fpscr.val = 0;
#ifdef CONFIG_ALTIVEC
err |= __put_user(v_regs, &sc->v_regs);
generated by cgit (git 2.34.1) at 2024-11-13 00:52:05 +0000