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Diffstat (limited to 'sys/arm/include/asm.h')
| -rw-r--r-- | sys/arm/include/asm.h | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/sys/arm/include/asm.h b/sys/arm/include/asm.h new file mode 100644 index 000000000000..d72aa67a39c2 --- /dev/null +++ b/sys/arm/include/asm.h @@ -0,0 +1,191 @@ +/* $NetBSD: asm.h,v 1.5 2003/08/07 16:26:53 agc Exp $ */ + +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * Copyright (c) 1990 The Regents of the University of California. + * All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * William Jolitz. + * + * 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. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. + */ + +#ifndef _MACHINE_ASM_H_ +#define _MACHINE_ASM_H_ +#include <sys/cdefs.h> + +#define _C_LABEL(x) x +#define _ASM_LABEL(x) x + +#ifndef _ALIGN_TEXT +# define _ALIGN_TEXT .align 2 +#endif + +#ifndef _STANDALONE +#define STOP_UNWINDING .cantunwind +#define _FNSTART .fnstart +#define _FNEND .fnend +#define _SAVE(...) .save __VA_ARGS__ +#else +#define STOP_UNWINDING +#define _FNSTART +#define _FNEND +#define _SAVE(...) +#endif + +/* + * gas/arm uses @ as a single comment character and thus cannot be used here. + * It recognises the # instead of an @ symbol in .type directives. + */ +#define _ASM_TYPE_FUNCTION #function +#define _ASM_TYPE_OBJECT #object + +/* + * EENTRY()/EEND() mark "extra" entry/exit points from a function. + * LEENTRY()/LEEND() are the same for local symbols. + * The unwind info cannot handle the concept of a nested function, or a function + * with multiple .fnstart directives, but some of our assembler code is written + * with multiple labels to allow entry at several points. The EENTRY() macro + * defines such an extra entry point without a new .fnstart, so that it's + * basically just a label that you can jump to. The EEND() macro does nothing + * at all, except document the exit point associated with the same-named entry. + */ +#define GLOBAL(x) .global x + +#ifdef __thumb__ +#define _FUNC_MODE .code 16; .thumb_func +#else +#define _FUNC_MODE .code 32 +#endif + +#define _LEENTRY(x) .type x,_ASM_TYPE_FUNCTION; _FUNC_MODE; x: +#define _LEEND(x) /* nothing */ +#define _EENTRY(x) GLOBAL(x); _LEENTRY(x) +#define _EEND(x) _LEEND(x) + +#define _LENTRY(x) .text; _ALIGN_TEXT; _LEENTRY(x); _FNSTART +#define _LEND(x) .size x, . - x; _FNEND +#define _ENTRY(x) .text; _ALIGN_TEXT; _EENTRY(x); _FNSTART +#define _END(x) _LEND(x) + +#define ENTRY(y) _ENTRY(_C_LABEL(y)); +#define EENTRY(y) _EENTRY(_C_LABEL(y)); +#define ENTRY_NP(y) _ENTRY(_C_LABEL(y)) +#define EENTRY_NP(y) _EENTRY(_C_LABEL(y)) +#define END(y) _END(_C_LABEL(y)) +#define EEND(y) _EEND(_C_LABEL(y)) +#define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); +#define ASLENTRY(y) _LENTRY(_ASM_LABEL(y)); +#define ASEENTRY(y) _EENTRY(_ASM_LABEL(y)); +#define ASLEENTRY(y) _LEENTRY(_ASM_LABEL(y)); +#define ASENTRY_NP(y) _ENTRY(_ASM_LABEL(y)) +#define ASLENTRY_NP(y) _LENTRY(_ASM_LABEL(y)) +#define ASEENTRY_NP(y) _EENTRY(_ASM_LABEL(y)) +#define ASLEENTRY_NP(y) _LEENTRY(_ASM_LABEL(y)) +#define ASEND(y) _END(_ASM_LABEL(y)) +#define ASLEND(y) _LEND(_ASM_LABEL(y)) +#define ASEEND(y) _EEND(_ASM_LABEL(y)) +#define ASLEEND(y) _LEEND(_ASM_LABEL(y)) + +#define ASMSTR .asciz + +#if defined(PIC) +#define PLT_SYM(x) PIC_SYM(x, PLT) +#define GOT_SYM(x) PIC_SYM(x, GOT) +#define GOT_GET(x,got,sym) \ + ldr x, sym; \ + ldr x, [x, got] +#define GOT_INIT(got,gotsym,pclabel) \ + ldr got, gotsym; \ + pclabel: add got, pc +#ifdef __thumb__ +#define GOT_INITSYM(gotsym,pclabel) \ + .align 2; \ + gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) - (pclabel+4) +#else +#define GOT_INITSYM(gotsym,pclabel) \ + .align 2; \ + gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) - (pclabel+8) +#endif + +#ifdef __STDC__ +#define PIC_SYM(x,y) x ## ( ## y ## ) +#else +#define PIC_SYM(x,y) x/**/(/**/y/**/) +#endif + +#else +#define PLT_SYM(x) x +#define GOT_SYM(x) x +#define GOT_GET(x,got,sym) \ + ldr x, sym; +#define GOT_INIT(got,gotsym,pclabel) +#define GOT_INITSYM(gotsym,pclabel) +#define PIC_SYM(x,y) x +#endif /* PIC */ + +#undef __FBSDID +#if !defined(lint) && !defined(STRIP_FBSDID) +#define __FBSDID(s) .ident s +#else +#define __FBSDID(s) /* nothing */ +#endif + +#define WEAK_ALIAS(alias,sym) \ + .weak alias; \ + alias = sym + +#ifdef __STDC__ +#define WARN_REFERENCES(sym,msg) \ + .stabs msg ## ,30,0,0,0 ; \ + .stabs __STRING(_C_LABEL(sym)) ## ,1,0,0,0 +#else +#define WARN_REFERENCES(sym,msg) \ + .stabs msg,30,0,0,0 ; \ + .stabs __STRING(sym),1,0,0,0 +#endif /* __STDC__ */ + +# define RET bx lr +# define RETeq bxeq lr +# define RETne bxne lr +# define RETc(c) bx##c lr + +#define ISB isb +#define DSB dsb +#define DMB dmb +#define WFI wfi + +#if defined(__ARM_ARCH_7VE__) || defined(__clang__) +#define MSR_ELR_HYP(regnum) msr elr_hyp, lr +#define ERET eret +#else +#define MSR_ELR_HYP(regnum) .word (0xe12ef300 | regnum) +#define ERET .word 0xe160006e +#endif + + +#endif /* !_MACHINE_ASM_H_ */ |