From: Sid Manning sidneym@codeaurora.org
commit f1f99adf05f2138ff2646d756d4674e302e8d02d upstream.
Add the compiler-rt builtins like memcpy to the hexagon kernel.
Signed-off-by: Sid Manning sidneym@codeaurora.org Add SYM_FUNC_START/END, ksyms exports Signed-off-by: Brian Cain bcain@codeaurora.org Cc: Guenter Roeck linux@roeck-us.net Tested-by: Nick Desaulniers ndesaulniers@google.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/hexagon/Makefile | 3 - arch/hexagon/kernel/hexagon_ksyms.c | 8 +-- arch/hexagon/lib/Makefile | 3 - arch/hexagon/lib/divsi3.S | 67 +++++++++++++++++++++++++++++++ arch/hexagon/lib/memcpy_likely_aligned.S | 56 +++++++++++++++++++++++++ arch/hexagon/lib/modsi3.S | 46 +++++++++++++++++++++ arch/hexagon/lib/udivsi3.S | 38 +++++++++++++++++ arch/hexagon/lib/umodsi3.S | 36 ++++++++++++++++ 8 files changed, 249 insertions(+), 8 deletions(-)
--- a/arch/hexagon/Makefile +++ b/arch/hexagon/Makefile @@ -33,9 +33,6 @@ TIR_NAME := r19 KBUILD_CFLAGS += -ffixed-$(TIR_NAME) -DTHREADINFO_REG=$(TIR_NAME) -D__linux__ KBUILD_AFLAGS += -DTHREADINFO_REG=$(TIR_NAME)
-LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name 2>/dev/null) -libs-y += $(LIBGCC) - head-y := arch/hexagon/kernel/head.o
core-y += arch/hexagon/kernel/ \ --- a/arch/hexagon/kernel/hexagon_ksyms.c +++ b/arch/hexagon/kernel/hexagon_ksyms.c @@ -35,8 +35,8 @@ EXPORT_SYMBOL(_dflt_cache_att); DECLARE_EXPORT(__hexagon_memcpy_likely_aligned_min32bytes_mult8bytes);
/* Additional functions */ -DECLARE_EXPORT(__divsi3); -DECLARE_EXPORT(__modsi3); -DECLARE_EXPORT(__udivsi3); -DECLARE_EXPORT(__umodsi3); +DECLARE_EXPORT(__hexagon_divsi3); +DECLARE_EXPORT(__hexagon_modsi3); +DECLARE_EXPORT(__hexagon_udivsi3); +DECLARE_EXPORT(__hexagon_umodsi3); DECLARE_EXPORT(csum_tcpudp_magic); --- a/arch/hexagon/lib/Makefile +++ b/arch/hexagon/lib/Makefile @@ -2,4 +2,5 @@ # # Makefile for hexagon-specific library files. # -obj-y = checksum.o io.o memcpy.o memset.o +obj-y = checksum.o io.o memcpy.o memset.o memcpy_likely_aligned.o \ + divsi3.o modsi3.o udivsi3.o umodsi3.o --- /dev/null +++ b/arch/hexagon/lib/divsi3.S @@ -0,0 +1,67 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2021, The Linux Foundation. All rights reserved. + */ + +#include <linux/linkage.h> + +SYM_FUNC_START(__hexagon_divsi3) + { + p0 = cmp.gt(r0,#-1) + p1 = cmp.gt(r1,#-1) + r3:2 = vabsw(r1:0) + } + { + p3 = xor(p0,p1) + r4 = sub(r2,r3) + r6 = cl0(r2) + p0 = cmp.gtu(r3,r2) + } + { + r0 = mux(p3,#-1,#1) + r7 = cl0(r3) + p1 = cmp.gtu(r3,r4) + } + { + r0 = mux(p0,#0,r0) + p0 = or(p0,p1) + if (p0.new) jumpr:nt r31 + r6 = sub(r7,r6) + } + { + r7 = r6 + r5:4 = combine(#1,r3) + r6 = add(#1,lsr(r6,#1)) + p0 = cmp.gtu(r6,#4) + } + { + r5:4 = vaslw(r5:4,r7) + if (!p0) r6 = #3 + } + { + loop0(1f,r6) + r7:6 = vlsrw(r5:4,#1) + r1:0 = #0 + } + .falign +1: + { + r5:4 = vlsrw(r5:4,#2) + if (!p0.new) r0 = add(r0,r5) + if (!p0.new) r2 = sub(r2,r4) + p0 = cmp.gtu(r4,r2) + } + { + r7:6 = vlsrw(r7:6,#2) + if (!p0.new) r0 = add(r0,r7) + if (!p0.new) r2 = sub(r2,r6) + p0 = cmp.gtu(r6,r2) + }:endloop0 + { + if (!p0) r0 = add(r0,r7) + } + { + if (p3) r0 = sub(r1,r0) + jumpr r31 + } +SYM_FUNC_END(__hexagon_divsi3) --- /dev/null +++ b/arch/hexagon/lib/memcpy_likely_aligned.S @@ -0,0 +1,56 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2021, The Linux Foundation. All rights reserved. + */ + +#include <linux/linkage.h> + +SYM_FUNC_START(__hexagon_memcpy_likely_aligned_min32bytes_mult8bytes) + { + p0 = bitsclr(r1,#7) + p0 = bitsclr(r0,#7) + if (p0.new) r5:4 = memd(r1) + if (p0.new) r7:6 = memd(r1+#8) + } + { + if (!p0) jump:nt .Lmemcpy_call + if (p0) r9:8 = memd(r1+#16) + if (p0) r11:10 = memd(r1+#24) + p0 = cmp.gtu(r2,#64) + } + { + if (p0) jump:nt .Lmemcpy_call + if (!p0) memd(r0) = r5:4 + if (!p0) memd(r0+#8) = r7:6 + p0 = cmp.gtu(r2,#32) + } + { + p1 = cmp.gtu(r2,#40) + p2 = cmp.gtu(r2,#48) + if (p0) r13:12 = memd(r1+#32) + if (p1.new) r15:14 = memd(r1+#40) + } + { + memd(r0+#16) = r9:8 + memd(r0+#24) = r11:10 + } + { + if (p0) memd(r0+#32) = r13:12 + if (p1) memd(r0+#40) = r15:14 + if (!p2) jumpr:t r31 + } + { + p0 = cmp.gtu(r2,#56) + r5:4 = memd(r1+#48) + if (p0.new) r7:6 = memd(r1+#56) + } + { + memd(r0+#48) = r5:4 + if (p0) memd(r0+#56) = r7:6 + jumpr r31 + } + +.Lmemcpy_call: + jump memcpy + +SYM_FUNC_END(__hexagon_memcpy_likely_aligned_min32bytes_mult8bytes) --- /dev/null +++ b/arch/hexagon/lib/modsi3.S @@ -0,0 +1,46 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2021, The Linux Foundation. All rights reserved. + */ + +#include <linux/linkage.h> + +SYM_FUNC_START(__hexagon_modsi3) + { + p2 = cmp.ge(r0,#0) + r2 = abs(r0) + r1 = abs(r1) + } + { + r3 = cl0(r2) + r4 = cl0(r1) + p0 = cmp.gtu(r1,r2) + } + { + r3 = sub(r4,r3) + if (p0) jumpr r31 + } + { + p1 = cmp.eq(r3,#0) + loop0(1f,r3) + r0 = r2 + r2 = lsl(r1,r3) + } + .falign +1: + { + p0 = cmp.gtu(r2,r0) + if (!p0.new) r0 = sub(r0,r2) + r2 = lsr(r2,#1) + if (p1) r1 = #0 + }:endloop0 + { + p0 = cmp.gtu(r2,r0) + if (!p0.new) r0 = sub(r0,r1) + if (p2) jumpr r31 + } + { + r0 = neg(r0) + jumpr r31 + } +SYM_FUNC_END(__hexagon_modsi3) --- /dev/null +++ b/arch/hexagon/lib/udivsi3.S @@ -0,0 +1,38 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2021, The Linux Foundation. All rights reserved. + */ + +#include <linux/linkage.h> + +SYM_FUNC_START(__hexagon_udivsi3) + { + r2 = cl0(r0) + r3 = cl0(r1) + r5:4 = combine(#1,#0) + p0 = cmp.gtu(r1,r0) + } + { + r6 = sub(r3,r2) + r4 = r1 + r1:0 = combine(r0,r4) + if (p0) jumpr r31 + } + { + r3:2 = vlslw(r5:4,r6) + loop0(1f,r6) + } + .falign +1: + { + p0 = cmp.gtu(r2,r1) + if (!p0.new) r1 = sub(r1,r2) + if (!p0.new) r0 = add(r0,r3) + r3:2 = vlsrw(r3:2,#1) + }:endloop0 + { + p0 = cmp.gtu(r2,r1) + if (!p0.new) r0 = add(r0,r3) + jumpr r31 + } +SYM_FUNC_END(__hexagon_udivsi3) --- /dev/null +++ b/arch/hexagon/lib/umodsi3.S @@ -0,0 +1,36 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2021, The Linux Foundation. All rights reserved. + */ + +#include <linux/linkage.h> + +SYM_FUNC_START(__hexagon_umodsi3) + { + r2 = cl0(r0) + r3 = cl0(r1) + p0 = cmp.gtu(r1,r0) + } + { + r2 = sub(r3,r2) + if (p0) jumpr r31 + } + { + loop0(1f,r2) + p1 = cmp.eq(r2,#0) + r2 = lsl(r1,r2) + } + .falign +1: + { + p0 = cmp.gtu(r2,r0) + if (!p0.new) r0 = sub(r0,r2) + r2 = lsr(r2,#1) + if (p1) r1 = #0 + }:endloop0 + { + p0 = cmp.gtu(r2,r0) + if (!p0.new) r0 = sub(r0,r1) + jumpr r31 + } +SYM_FUNC_END(__hexagon_umodsi3)