diff options
Diffstat (limited to 'target/linux/generic/patches-3.10/304-mips_disable_fpu.patch')
| -rw-r--r-- | target/linux/generic/patches-3.10/304-mips_disable_fpu.patch | 202 |
1 files changed, 78 insertions, 124 deletions
diff --git a/target/linux/generic/patches-3.10/304-mips_disable_fpu.patch b/target/linux/generic/patches-3.10/304-mips_disable_fpu.patch index c540ba0f7d..8d69bf2e53 100644 --- a/target/linux/generic/patches-3.10/304-mips_disable_fpu.patch +++ b/target/linux/generic/patches-3.10/304-mips_disable_fpu.patch @@ -20,7 +20,7 @@ Signed-off-by: Florian Fainelli <florian@openwrt.org> + 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 @@ -28,12 +28,13 @@ Signed-off-by: Florian Fainelli <florian@openwrt.org> --- a/arch/mips/math-emu/Makefile +++ b/arch/mips/math-emu/Makefile -@@ -2,10 +2,11 @@ +@@ -2,10 +2,12 @@ # 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-y := kernel_linkage.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 \ @@ -41,121 +42,7 @@ Signed-off-by: Florian Fainelli <florian@openwrt.org> 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 -@@ -59,7 +59,11 @@ - #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); - -@@ -70,10 +74,6 @@ 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 */ -@@ -82,11 +82,15 @@ DEFINE_PER_CPU(struct mips_fpu_emulator_ - /* Determine rounding mode from the RM bits of the FCSR */ - #define modeindex(v) ((v) & FPU_CSR_RM) - -+#endif /* CONFIG_MIPS_FPU_EMU */ -+ - /* microMIPS bitfields */ - #define MM_POOL32A_MINOR_MASK 0x3f - #define MM_POOL32A_MINOR_SHIFT 0x6 - #define MM_MIPS32_COND_FC 0x30 - -+#ifdef CONFIG_MIPS_FPU_EMU -+ - /* Convert Mips rounding mode (0..3) to IEEE library modes. */ - static const unsigned char ieee_rm[4] = { - [FPU_CSR_RN] = IEEE754_RN, -@@ -116,9 +120,13 @@ static const unsigned int fpucondbit[8] - }; - #endif - -+#endif /* CONFIG_MIPS_FPU_EMU */ -+ - /* (microMIPS) Convert 16-bit register encoding to 32-bit register encoding. */ - static const unsigned int reg16to32map[8] = {16, 17, 2, 3, 4, 5, 6, 7}; - -+#ifdef CONFIG_MIPS_FPU_EMU -+ - /* (microMIPS) Convert certain microMIPS instructions to MIPS32 format. */ - static const int sd_format[] = {16, 17, 0, 0, 0, 0, 0, 0}; - static const int sdps_format[] = {16, 17, 22, 0, 0, 0, 0, 0}; -@@ -463,6 +471,8 @@ static int microMIPS32_to_MIPS32(union m - return 0; - } - -+#endif /* CONFIG_MIPS_FPU_EMU */ -+ - int mm_isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn, - unsigned long *contpc) - { -@@ -667,6 +677,8 @@ int mm_isBranchInstr(struct pt_regs *reg - return 0; - } - -+#ifdef CONFIG_MIPS_FPU_EMU -+ - /* - * Redundant with logic already in kernel/branch.c, - * embedded in compute_return_epc. At some point, -@@ -2102,7 +2114,6 @@ int fpu_emulator_cop1Handler(struct pt_r - - return sig; - } -- - #ifdef CONFIG_DEBUG_FS - - static int fpuemu_stat_get(void *data, u64 *val) -@@ -2151,4 +2162,11 @@ 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, void *__user *fault_addr) -+{ -+ return 0; -+} -+#endif /* CONFIG_MIPS_FPU_EMU */ ---- a/arch/mips/math-emu/dsemul.c -+++ b/arch/mips/math-emu/dsemul.c -@@ -119,6 +119,7 @@ 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; -@@ -182,3 +183,9 @@ int do_dsemulret(struct pt_regs *xcp) - - return 1; - } -+#else -+int do_dsemulret(struct pt_regs *xcp) -+{ -+ return 0; -+} -+#endif /* CONFIG_MIPS_FPU_EMU */ ++ dp_sqrt.o sp_sqrt.o dsemul.o cp1emu.o --- a/arch/mips/math-emu/kernel_linkage.c +++ b/arch/mips/math-emu/kernel_linkage.c @@ -29,6 +29,7 @@ @@ -166,12 +53,11 @@ Signed-off-by: Florian Fainelli <florian@openwrt.org> void fpu_emulator_init_fpu(void) { static int first = 1; -@@ -112,4 +113,36 @@ int fpu_emulator_restore_context32(struc - +@@ -113,3 +114,36 @@ int fpu_emulator_restore_context32(struc return err; } --#endif -+#endif /* CONFIG_64BIT */ + #endif ++ +#else + +void fpu_emulator_init_fpu(void) @@ -191,6 +77,7 @@ Signed-off-by: Florian Fainelli <florian@openwrt.org> + return 0; +} + ++#ifdef CONFIG_64BIT +int fpu_emulator_save_context32(struct sigcontext32 __user *sc) +{ + return 0; @@ -200,7 +87,74 @@ Signed-off-by: Florian Fainelli <florian@openwrt.org> +{ + return 0; +} ++#endif /* CONFIG_64BIT */ + -+#ifdef CONFIG_64BIT -+#endif /* CONFIG_64BIT */ +#endif /* CONFIG_MIPS_FPU_EMU */ +--- a/arch/mips/include/asm/fpu_emulator.h ++++ b/arch/mips/include/asm/fpu_emulator.h +@@ -27,6 +27,8 @@ + #include <asm/inst.h> + #include <asm/local.h> + ++#ifdef CONFIG_MIPS_FPU_EMU ++ + #ifdef CONFIG_DEBUG_FS + + struct mips_fpu_emulator_stats { +@@ -60,6 +62,38 @@ extern int fpu_emulator_cop1Handler(stru + int process_fpemu_return(int sig, void __user *fault_addr); + int mm_isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn, + unsigned long *contpc); ++#else ++static inline int mips_dsemul(struct pt_regs *regs, mips_instruction ir, ++ unsigned long cpc) ++{ ++ return 0; ++} ++ ++static inline int do_dsemulret(struct pt_regs *xcp) ++{ ++ return 0; ++} ++ ++static inline int fpu_emulator_cop1Handler(struct pt_regs *xcp, ++ struct mips_fpu_struct *ctx, ++ int has_fpu, ++ void *__user *fault_addr) ++{ ++ return 0; ++} ++ ++static inline int process_fpemu_return(int sig, void __user *fault_addr) ++{ ++ return -EINVAL; ++} ++ ++static inline int mm_isBranchInstr(struct pt_regs *regs, ++ struct mm_decoded_insn dec_insn, ++ unsigned long *contpc) ++{ ++ return 0; ++} ++#endif /* CONFIG_MIPS_FPU_EMU */ + + /* + * Instruction inserted following the badinst to further tag the sequence +--- a/arch/mips/kernel/traps.c ++++ b/arch/mips/kernel/traps.c +@@ -684,6 +684,7 @@ asmlinkage void do_ov(struct pt_regs *re + force_sig_info(SIGFPE, &info, current); + } + ++#ifdef CONFIG_MIPS_FPU_EMU + int process_fpemu_return(int sig, void __user *fault_addr) + { + if (sig == SIGSEGV || sig == SIGBUS) { +@@ -707,6 +708,7 @@ int process_fpemu_return(int sig, void _ + return 0; + } + } ++#endif /* CONFIG_MIPS_FPU_EMU */ + + /* + * XXX Delayed fp exceptions when doing a lazy ctx switch XXX |