diff options
author | br <br@FreeBSD.org> | 2015-12-11 22:55:23 +0000 |
---|---|---|
committer | br <br@FreeBSD.org> | 2015-12-11 22:55:23 +0000 |
commit | e10e8212ee93ce83ca450cc277687c96a828f398 (patch) | |
tree | 8d05418c0387dad6bfb0579dd063e716f1f65109 /lib | |
parent | 7fd0d14bf5c00a44cde73d32e20a6209088f7013 (diff) | |
download | FreeBSD-src-e10e8212ee93ce83ca450cc277687c96a828f398.zip FreeBSD-src-e10e8212ee93ce83ca450cc277687c96a828f398.tar.gz |
Start support for the RISC-V 64-bit architecture developed by UC Berkeley.
RISC-V is a new ISA designed to support computer research and education, and
is now become a standard open architecture for industry implementations.
This is a minimal set of changes required to run 'make kernel-toolchain'
using external (GNU) toolchain.
The FreeBSD/RISC-V project home: https://wiki.freebsd.org/riscv.
Reviewed by: andrew, bdrewery, emaste, imp
Sponsored by: DARPA, AFRL
Sponsored by: HEIF5
Differential Revision: https://reviews.freebsd.org/D4445
Diffstat (limited to 'lib')
-rw-r--r-- | lib/csu/riscv/Makefile | 46 | ||||
-rw-r--r-- | lib/csu/riscv/crt1.c | 89 | ||||
-rw-r--r-- | lib/csu/riscv/crti.S | 58 | ||||
-rw-r--r-- | lib/csu/riscv/crtn.S | 48 | ||||
-rw-r--r-- | lib/libc/riscv/Makefile.inc | 1 | ||||
-rw-r--r-- | lib/libthr/arch/riscv/Makefile.inc | 1 | ||||
-rw-r--r-- | lib/msun/riscv/Makefile.inc | 6 | ||||
-rw-r--r-- | lib/msun/riscv/fenv.h | 228 |
8 files changed, 477 insertions, 0 deletions
diff --git a/lib/csu/riscv/Makefile b/lib/csu/riscv/Makefile new file mode 100644 index 0000000..9747619 --- /dev/null +++ b/lib/csu/riscv/Makefile @@ -0,0 +1,46 @@ +# $FreeBSD$ + +.PATH: ${.CURDIR}/../common + +SRCS= crt1.c crti.S crtn.S +OBJS= ${SRCS:N*.h:R:S/$/.o/g} +OBJS+= Scrt1.o gcrt1.o +CFLAGS+= -I${.CURDIR}/../common \ + -I${.CURDIR}/../../libc/include + +FILES= ${OBJS} +FILESMODE= ${LIBMODE} +FILESOWN= ${LIBOWN} +FILESGRP= ${LIBGRP} +FILESDIR= ${LIBDIR} +# These FILES qualify as libraries for the purpose of LIBRARIES_ONLY. +.undef LIBRARIES_ONLY + +CLEANFILES= ${OBJS} +CLEANFILES+= crt1.s gcrt1.s Scrt1.s + +# See the comment in lib/csu/common/crtbrand.c for the reason crt1.c is not +# directly compiled to .o files. + +crt1.s: crt1.c + ${CC} ${CFLAGS} -S -o ${.TARGET} ${.CURDIR}/crt1.c + sed ${SED_FIX_NOTE} ${.TARGET} + +crt1.o: crt1.s + ${CC} ${ACFLAGS} -c -o ${.TARGET} crt1.s + +gcrt1.s: crt1.c + ${CC} ${CFLAGS} -DGCRT -S -o ${.TARGET} ${.CURDIR}/crt1.c + sed ${SED_FIX_NOTE} ${.TARGET} + +gcrt1.o: gcrt1.s + ${CC} ${ACFLAGS} -c -o ${.TARGET} gcrt1.s + +Scrt1.s: crt1.c + ${CC} ${CFLAGS} -fPIC -DPIC -S -o ${.TARGET} ${.CURDIR}/crt1.c + sed ${SED_FIX_NOTE} ${.TARGET} + +Scrt1.o: Scrt1.s + ${CC} ${ACFLAGS} -c -o ${.TARGET} Scrt1.s + +.include <bsd.lib.mk> diff --git a/lib/csu/riscv/crt1.c b/lib/csu/riscv/crt1.c new file mode 100644 index 0000000..0c3fbe6 --- /dev/null +++ b/lib/csu/riscv/crt1.c @@ -0,0 +1,89 @@ +/* LINTLIBRARY */ +/*- + * Copyright 1996-1998 John D. Polstra. + * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com> + * All rights reserved. + * + * Portions of this software were developed by SRI International and the + * University of Cambridge Computer Laboratory under DARPA/AFRL contract + * FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme. + * + * Portions of this software were developed by the University of Cambridge + * Computer Laboratory as part of the CTSRD Project, with support from the + * UK Higher Education Innovation Fund (HEIF). + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <stdlib.h> + +#include "libc_private.h" +#include "crtbrand.c" +#include "ignore_init.c" + +typedef void (*fptr)(void); + +#ifdef GCRT +extern void _mcleanup(void); +extern void monstartup(void *, void *); +extern int eprol; +extern int etext; +#endif + +void __start(int argc, char **argv, char **env, void (*cleanup)(void)); + +/* The entry function. */ +__asm(" .text \n" +" .align 0 \n" +" .globl _start \n" +" _start: \n" +" mv a3, a2 \n" /* cleanup */ +" addi a1, a0, 8 \n" /* get argv */ +" ld a0, 0(a0) \n" /* load argc */ +" slli t0, a0, 3 \n" /* mult by arg size */ +" add a2, a1, t0 \n" /* env is after argv */ +" addi a2, a2, 8 \n" /* argv is null terminated */ +" lla gp, _gp \n" /* load global pointer */ +" call __start"); + +void +__start(int argc, char **argv, char **env, void (*cleanup)(void)) +{ + + handle_argv(argc, argv, env); + + if (&_DYNAMIC != NULL) + atexit(cleanup); + else + _init_tls(); + +#ifdef GCRT + atexit(_mcleanup); + monstartup(&eprol, &etext); +__asm__("eprol:"); +#endif + + handle_static_init(argc, argv, env); + exit(main(argc, argv, env)); +} diff --git a/lib/csu/riscv/crti.S b/lib/csu/riscv/crti.S new file mode 100644 index 0000000..df6027e --- /dev/null +++ b/lib/csu/riscv/crti.S @@ -0,0 +1,58 @@ +/*- + * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com> + * All rights reserved. + * + * Portions of this software were developed by SRI International and the + * University of Cambridge Computer Laboratory under DARPA/AFRL contract + * FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme. + * + * Portions of this software were developed by the University of Cambridge + * Computer Laboratory as part of the CTSRD Project, with support from the + * UK Higher Education Innovation Fund (HEIF). + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <machine/asm.h> +__FBSDID("$FreeBSD$"); + +# this puts _gp into .dynsym, so symlook_obj can now find that (see reloc.c) + .weak _gp +_gp: + + .section .init,"ax",@progbits + .align 2 + .globl _init + .type _init,@function +_init: + addi sp, sp, -16 + sd ra, 0(sp) + + .section .fini,"ax",@progbits + .align 2 + .globl _fini + .type _fini,@function +_fini: + addi sp, sp, -16 + sd ra, 0(sp) + + .section .note.GNU-stack,"",%progbits diff --git a/lib/csu/riscv/crtn.S b/lib/csu/riscv/crtn.S new file mode 100644 index 0000000..b582471 --- /dev/null +++ b/lib/csu/riscv/crtn.S @@ -0,0 +1,48 @@ +/*- + * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com> + * All rights reserved. + * + * Portions of this software were developed by SRI International and the + * University of Cambridge Computer Laboratory under DARPA/AFRL contract + * FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme. + * + * Portions of this software were developed by the University of Cambridge + * Computer Laboratory as part of the CTSRD Project, with support from the + * UK Higher Education Innovation Fund (HEIF). + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <machine/asm.h> +__FBSDID("$FreeBSD$"); + + .section .init,"ax",@progbits + ld ra, 0(sp) + addi sp, sp, 16 + ret + + .section .fini,"ax",@progbits + ld ra, 0(sp) + addi sp, sp, 16 + ret + + .section .note.GNU-stack,"",%progbits diff --git a/lib/libc/riscv/Makefile.inc b/lib/libc/riscv/Makefile.inc new file mode 100644 index 0000000..e8c0da7 --- /dev/null +++ b/lib/libc/riscv/Makefile.inc @@ -0,0 +1 @@ +# $FreeBSD$ diff --git a/lib/libthr/arch/riscv/Makefile.inc b/lib/libthr/arch/riscv/Makefile.inc new file mode 100644 index 0000000..e8c0da7 --- /dev/null +++ b/lib/libthr/arch/riscv/Makefile.inc @@ -0,0 +1 @@ +# $FreeBSD$ diff --git a/lib/msun/riscv/Makefile.inc b/lib/msun/riscv/Makefile.inc new file mode 100644 index 0000000..0ce69db --- /dev/null +++ b/lib/msun/riscv/Makefile.inc @@ -0,0 +1,6 @@ +# $FreeBSD$ + +# RISCVTODO: should be 113 +# compilation problems: gcc generates bltuz instruction, which is not exists + +LDBL_PREC = 53 diff --git a/lib/msun/riscv/fenv.h b/lib/msun/riscv/fenv.h new file mode 100644 index 0000000..3eae6c2 --- /dev/null +++ b/lib/msun/riscv/fenv.h @@ -0,0 +1,228 @@ +/*- + * Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG> + * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com> + * All rights reserved. + * + * Portions of this software were developed by SRI International and the + * University of Cambridge Computer Laboratory under DARPA/AFRL contract + * FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme. + * + * Portions of this software were developed by the University of Cambridge + * Computer Laboratory as part of the CTSRD Project, with support from the + * UK Higher Education Innovation Fund (HEIF). + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _FENV_H_ +#define _FENV_H_ + +#include <sys/_types.h> + +#ifndef __fenv_static +#define __fenv_static static +#endif + +typedef __uint64_t fenv_t; +typedef __uint64_t fexcept_t; + +/* Exception flags */ +#define FE_INVALID 0x0010 +#define FE_DIVBYZERO 0x0008 +#define FE_OVERFLOW 0x0004 +#define FE_UNDERFLOW 0x0002 +#define FE_INEXACT 0x0001 +#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | \ + FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW) + +/* + * RISC-V Rounding modes + */ +#define FE_TONEAREST (0x00 << 5) +#define FE_TOWARDZERO (0x01 << 5) +#define FE_DOWNWARD (0x02 << 5) +#define FE_UPWARD (0x03 << 5) +#define _ROUND_SHIFT 5 +#define _ROUND_MASK (FE_TONEAREST | FE_DOWNWARD | \ + FE_UPWARD | FE_TOWARDZERO) + +__BEGIN_DECLS + +/* Default floating-point environment */ +extern const fenv_t __fe_dfl_env; +#define FE_DFL_ENV (&__fe_dfl_env) + +/* We need to be able to map status flag positions to mask flag positions */ +#define _FPUSW_SHIFT 0 +#define _ENABLE_MASK (FE_ALL_EXCEPT << _FPUSW_SHIFT) + +#define __rfs(__fpsr) __asm __volatile("csrr %0, fcsr" : "=r" (*(__fpsr))) +#define __wfs(__fpsr) __asm __volatile("csrw fcsr, %0" :: "r" (__fpsr)) + +__fenv_static inline int +feclearexcept(int __excepts) +{ + fexcept_t __fpsr; + + __rfs(&__fpsr); + __fpsr &= ~__excepts; + __wfs(__fpsr); + return (0); +} + +__fenv_static inline int +fegetexceptflag(fexcept_t *__flagp, int __excepts) +{ + fexcept_t __fpsr; + + __rfs(&__fpsr); + *__flagp = __fpsr & __excepts; + return (0); +} + +__fenv_static inline int +fesetexceptflag(const fexcept_t *__flagp, int __excepts) +{ + fexcept_t __fpsr; + + __rfs(&__fpsr); + __fpsr &= ~__excepts; + __fpsr |= *__flagp & __excepts; + __wfs(__fpsr); + return (0); +} + +__fenv_static inline int +feraiseexcept(int __excepts) +{ + fexcept_t __ex = __excepts; + + fesetexceptflag(&__ex, __excepts); /* XXX */ + return (0); +} + +__fenv_static inline int +fetestexcept(int __excepts) +{ + fexcept_t __fpsr; + + __rfs(&__fpsr); + return (__fpsr & __excepts); +} + +__fenv_static inline int +fegetround(void) +{ + + return (-1); +} + +__fenv_static inline int +fesetround(int __round) +{ + + return (-1); +} + +__fenv_static inline int +fegetenv(fenv_t *__envp) +{ + + __rfs(__envp); + return (0); +} + +__fenv_static inline int +feholdexcept(fenv_t *__envp) +{ + fenv_t __env; + + __rfs(&__env); + *__envp = __env; + __env &= ~(FE_ALL_EXCEPT | _ENABLE_MASK); + __wfs(__env); + return (0); +} + +__fenv_static inline int +fesetenv(const fenv_t *__envp) +{ + + __wfs(*__envp); + return (0); +} + +__fenv_static inline int +feupdateenv(const fenv_t *__envp) +{ + fexcept_t __fpsr; + + __rfs(&__fpsr); + __wfs(*__envp); + feraiseexcept(__fpsr & FE_ALL_EXCEPT); + return (0); +} + +#if __BSD_VISIBLE + +/* We currently provide no external definitions of the functions below. */ + +static inline int +feenableexcept(int __mask) +{ + fenv_t __old_fpsr; + fenv_t __new_fpsr; + + __rfs(&__old_fpsr); + __new_fpsr = __old_fpsr | (__mask & FE_ALL_EXCEPT) << _FPUSW_SHIFT; + __wfs(__new_fpsr); + return ((__old_fpsr >> _FPUSW_SHIFT) & FE_ALL_EXCEPT); +} + +static inline int +fedisableexcept(int __mask) +{ + fenv_t __old_fpsr; + fenv_t __new_fpsr; + + __rfs(&__old_fpsr); + __new_fpsr = __old_fpsr & ~((__mask & FE_ALL_EXCEPT) << _FPUSW_SHIFT); + __wfs(__new_fpsr); + return ((__old_fpsr >> _FPUSW_SHIFT) & FE_ALL_EXCEPT); +} + +static inline int +fegetexcept(void) +{ + fenv_t __fpsr; + + __rfs(&__fpsr); + return ((__fpsr & _ENABLE_MASK) >> _FPUSW_SHIFT); +} + +#endif /* __BSD_VISIBLE */ + +__END_DECLS + +#endif /* !_FENV_H_ */ |