aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/generic/patches-2.6.38/304-mips_disable_fpu.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/generic/patches-2.6.38/304-mips_disable_fpu.patch')
-rw-r--r--target/linux/generic/patches-2.6.38/304-mips_disable_fpu.patch160
1 files changed, 0 insertions, 160 deletions
diff --git a/target/linux/generic/patches-2.6.38/304-mips_disable_fpu.patch b/target/linux/generic/patches-2.6.38/304-mips_disable_fpu.patch
deleted file mode 100644
index d1f60df64d..0000000000
--- a/target/linux/generic/patches-2.6.38/304-mips_disable_fpu.patch
+++ /dev/null
@@ -1,160 +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
-@@ -887,6 +887,17 @@ 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
-@@ -2,11 +2,13 @@
- # 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
-
---- a/arch/mips/math-emu/cp1emu.c
-+++ b/arch/mips/math-emu/cp1emu.c
-@@ -58,7 +58,11 @@
- #define __mips 4
-
- /* Function which emulates a floating point instruction. */
-+#ifdef CONFIG_DEBUG_FS
-+DEFINE_PER_CPU(struct mips_fpu_emulator_stats, fpuemustats);
-+#endif
-
-+#ifdef CONFIG_MIPS_FPU_EMU
- static int fpu_emu(struct pt_regs *, struct mips_fpu_struct *,
- mips_instruction);
-
-@@ -69,10 +73,6 @@ static int fpux_emu(struct pt_regs *,
-
- /* Further private data for which no space exists in mips_fpu_struct */
-
--#ifdef CONFIG_DEBUG_FS
--DEFINE_PER_CPU(struct mips_fpu_emulator_stats, fpuemustats);
--#endif
--
- /* Control registers */
-
- #define FPCREG_RID 0 /* $0 = revision id */
-@@ -1361,7 +1361,6 @@ int fpu_emulator_cop1Handler(struct pt_r
-
- return sig;
- }
--
- #ifdef CONFIG_DEBUG_FS
-
- static int fpuemu_stat_get(void *data, u64 *val)
-@@ -1410,4 +1409,11 @@ static int __init debugfs_fpuemu(void)
- return 0;
- }
- __initcall(debugfs_fpuemu);
--#endif
-+#endif /* CONFIG_DEBUGFS */
-+#else
-+int fpu_emulator_cop1Handler(struct pt_regs *xcp, struct mips_fpu_struct *ctx,
-+ int has_fpu)
-+{
-+ return 0;
-+}
-+#endif /* CONFIG_MIPS_FPU_EMU */
---- a/arch/mips/math-emu/dsemul.c
-+++ b/arch/mips/math-emu/dsemul.c
-@@ -109,6 +109,7 @@ 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;
-@@ -165,3 +166,9 @@ 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
-@@ -29,6 +29,7 @@
-
- #define SIGNALLING_NAN 0x7ff800007ff80000LL
-
-+#ifdef CONFIG_MIPS_FPU_EMU
- void fpu_emulator_init_fpu(void)
- {
- static int first = 1;
-@@ -112,4 +113,36 @@ 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;
-+}
-+
-+int fpu_emulator_save_context32(struct sigcontext32 __user *sc)
-+{
-+ return 0;
-+}
-+
-+int fpu_emulator_restore_context32(struct sigcontext32 __user *sc)
-+{
-+ return 0;
-+}
-+
-+#ifdef CONFIG_64BIT
-+#endif /* CONFIG_64BIT */
-+#endif /* CONFIG_MIPS_FPU_EMU */