diff options
Diffstat (limited to 'target/linux/generic-2.6/patches-2.6.25/024-mips_disable_fpu.patch')
| -rw-r--r-- | target/linux/generic-2.6/patches-2.6.25/024-mips_disable_fpu.patch | 155 |
1 files changed, 0 insertions, 155 deletions
diff --git a/target/linux/generic-2.6/patches-2.6.25/024-mips_disable_fpu.patch b/target/linux/generic-2.6/patches-2.6.25/024-mips_disable_fpu.patch deleted file mode 100644 index 3dfbec7923..0000000000 --- a/target/linux/generic-2.6/patches-2.6.25/024-mips_disable_fpu.patch +++ /dev/null @@ -1,155 +0,0 @@ -MIPS: allow disabling the kernel FPU emulator - -This patch allows turning off the in-kernel Algorithmics -FPU emulator support, which allows one to save a couple of -precious blocks on an embedded system. - -Signed-off-by: Florian Fainelli <florian@openwrt.org> --- ---- a/arch/mips/Kconfig -+++ b/arch/mips/Kconfig -@@ -831,6 +831,17 @@ config I8259 - config MIPS_BONITO64 - bool - -+config MIPS_FPU_EMU -+ bool "Enable FPU emulation" -+ default y -+ help -+ This option allows building a kernel with or without the Algorithmics -+ FPU emulator enabled. Turning off this option results in a kernel which -+ does not catch floating operations exceptions. Make sure that your toolchain -+ is configured to enable software floating point emulation in that case. -+ -+ If unsure say Y here. -+ - config MIPS_MSC - bool - ---- a/arch/mips/math-emu/Makefile -+++ b/arch/mips/math-emu/Makefile -@@ -2,12 +2,14 @@ - # Makefile for the Linux/MIPS kernel FPU emulation. - # - --obj-y := cp1emu.o ieee754m.o ieee754d.o ieee754dp.o ieee754sp.o ieee754.o \ -+obj-y := kernel_linkage.o dsemul.o cp1emu.o -+ -+obj-$(CONFIG_MIPS_FPU_EMU) += ieee754m.o ieee754d.o ieee754dp.o ieee754sp.o ieee754.o \ - ieee754xcpt.o dp_frexp.o dp_modf.o dp_div.o dp_mul.o dp_sub.o \ - dp_add.o dp_fsp.o dp_cmp.o dp_logb.o dp_scalb.o dp_simple.o \ - dp_tint.o dp_fint.o dp_tlong.o dp_flong.o sp_frexp.o sp_modf.o \ - sp_div.o sp_mul.o sp_sub.o sp_add.o sp_fdp.o sp_cmp.o sp_logb.o \ - sp_scalb.o sp_simple.o sp_tint.o sp_fint.o sp_tlong.o sp_flong.o \ -- dp_sqrt.o sp_sqrt.o kernel_linkage.o dsemul.o -+ dp_sqrt.o sp_sqrt.o - - EXTRA_CFLAGS += -Werror ---- a/arch/mips/math-emu/cp1emu.c -+++ b/arch/mips/math-emu/cp1emu.c -@@ -57,6 +57,12 @@ - #endif - #define __mips 4 - -+/* Further private data for which no space exists in mips_fpu_struct */ -+ -+struct mips_fpu_emulator_stats fpuemustats; -+ -+#ifdef CONFIG_MIPS_FPU_EMU -+ - /* Function which emulates a floating point instruction. */ - - static int fpu_emu(struct pt_regs *, struct mips_fpu_struct *, -@@ -67,10 +73,6 @@ static int fpux_emu(struct pt_regs *, - struct mips_fpu_struct *, mips_instruction); - #endif - --/* Further private data for which no space exists in mips_fpu_struct */ -- --struct mips_fpu_emulator_stats fpuemustats; -- - /* Control registers */ - - #define FPCREG_RID 0 /* $0 = revision id */ -@@ -1277,6 +1279,13 @@ int fpu_emulator_cop1Handler(struct pt_r - - return sig; - } -+#else -+int fpu_emulator_cop1Handler(struct pt_regs *xcp, struct mips_fpu_struct *ctx, -+ int has_fpu) -+{ -+ return 0; -+} -+#endif /* CONFIG_MIPS_FPU_EMU */ - - #ifdef CONFIG_DEBUG_FS - extern struct dentry *mips_debugfs_dir; ---- a/arch/mips/math-emu/dsemul.c -+++ b/arch/mips/math-emu/dsemul.c -@@ -110,6 +110,7 @@ int mips_dsemul(struct pt_regs *regs, mi - return SIGILL; /* force out of emulation loop */ - } - -+#ifdef CONFIG_MIPS_FPU_EMU - int do_dsemulret(struct pt_regs *xcp) - { - struct emuframe __user *fr; -@@ -166,3 +167,9 @@ int do_dsemulret(struct pt_regs *xcp) - - return 1; - } -+#else -+int do_dsemulret(struct pt_regs *xcp) -+{ -+ return 0; -+} -+#endif /* CONFIG_MIPS_FPU_EMU */ ---- a/arch/mips/math-emu/kernel_linkage.c -+++ b/arch/mips/math-emu/kernel_linkage.c -@@ -28,6 +28,7 @@ - - #define SIGNALLING_NAN 0x7ff800007ff80000LL - -+#ifdef CONFIG_MIPS_FPU_EMU - void fpu_emulator_init_fpu(void) - { - static int first = 1; -@@ -111,4 +112,36 @@ int fpu_emulator_restore_context32(struc - - return err; - } --#endif -+#endif /* CONFIG_64BIT */ -+#else -+ -+void fpu_emulator_init_fpu(void) -+{ -+ printk(KERN_INFO "FPU emulator disabled, make sure your toolchain" -+ "was compiled with software floating point support (soft-float)\n"); -+ return; -+} -+ -+int fpu_emulator_save_context(struct sigcontext __user *sc) -+{ -+ return 0; -+} -+ -+int fpu_emulator_restore_context(struct sigcontext __user *sc) -+{ -+ return 0; -+} -+ -+#ifdef CONFIG_64BIT -+int fpu_emulator_save_context32(struct sigcontext32 __user *sc) -+{ -+ return 0; -+} -+ -+int fpu_emulator_restore_context32(struct sigcontext32 __user *sc) -+{ -+ return 0; -+} -+ -+#endif /* CONFIG_64BIT */ -+#endif /* CONFIG_MIPS_FPU_EMU */ |