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Diffstat (limited to 'sys/powerpc/include/asm.h')
| -rw-r--r-- | sys/powerpc/include/asm.h | 267 |
1 files changed, 267 insertions, 0 deletions
diff --git a/sys/powerpc/include/asm.h b/sys/powerpc/include/asm.h new file mode 100644 index 000000000000..35a8536776ea --- /dev/null +++ b/sys/powerpc/include/asm.h @@ -0,0 +1,267 @@ +/*- + * SPDX-License-Identifier: BSD-4-Clause + * + * Copyright (C) 1995, 1996 Wolfgang Solfrank. + * Copyright (C) 1995, 1996 TooLs GmbH. + * All rights reserved. + * + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by TooLs GmbH. + * 4. The name of TooLs GmbH may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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. + * + * $NetBSD: asm.h,v 1.6.18.1 2000/07/25 08:37:14 kleink Exp $ + */ + +#ifndef _MACHINE_ASM_H_ +#define _MACHINE_ASM_H_ + +#include <sys/cdefs.h> + +#if defined(PIC) && !defined(__powerpc64__) +#define PIC_PROLOGUE XXX +#define PIC_EPILOGUE XXX +#define PIC_PLT(x) x@plt +#ifdef __STDC__ +#define PIC_GOT(x) XXX +#else /* not __STDC__ */ +#define PIC_GOT(x) XXX +#endif /* __STDC__ */ +#else +#define PIC_PROLOGUE +#define PIC_EPILOGUE +#define PIC_PLT(x) x +#define PIC_GOT(x) x +#endif + +#define CNAME(csym) csym +#define ASMNAME(asmsym) asmsym +#ifdef __powerpc64__ +#define HIDENAME(asmsym) __CONCAT(_,asmsym) +#else +#define HIDENAME(asmsym) __CONCAT(.,asmsym) +#endif + +#if !defined(_CALL_ELF) || _CALL_ELF == 1 +#ifdef _KERNEL +/* ELFv1 kernel uses global dot symbols */ +#define DOT_LABEL(name) __CONCAT(.,name) +#define TYPE_ENTRY(name) .size name,24; \ + .type DOT_LABEL(name),@function; \ + .globl DOT_LABEL(name); +#define END_SIZE(name) .size DOT_LABEL(name),.-DOT_LABEL(name); +#else /* !_KERNEL */ +/* ELFv1 user code uses local function entry points */ +#define DOT_LABEL(name) __CONCAT(.L.,name) +#define TYPE_ENTRY(name) .type name,@function; +#define END_SIZE(name) .size name,.-DOT_LABEL(name); +#endif /* _KERNEL */ +#else +/* ELFv2 doesn't have any of this complication */ +#define DOT_LABEL(name) name +#define TYPE_ENTRY(name) .type name,@function; +#define END_SIZE(name) .size name,.-DOT_LABEL(name); +#endif + +#define _GLOBAL(name) \ + .data; \ + .p2align 2; \ + .globl name; \ + name: + +#ifdef __powerpc64__ +#define TOC_NAME_FOR_REF(name) __CONCAT(.L,name) +#define TOC_REF(name) TOC_NAME_FOR_REF(name)@toc +#define TOC_ENTRY(name) \ + .section ".toc","aw"; \ + TOC_NAME_FOR_REF(name): \ + .tc name[TC],name +#endif + +#ifdef __powerpc64__ + +#if !defined(_CALL_ELF) || _CALL_ELF == 1 +#define _ENTRY(name) \ + .section ".text"; \ + .p2align 2; \ + .globl name; \ + .section ".opd","aw"; \ + .p2align 3; \ +name: \ + .quad DOT_LABEL(name),.TOC.@tocbase,0; \ + .previous; \ + .p2align 4; \ + TYPE_ENTRY(name) \ +DOT_LABEL(name): \ + .cfi_startproc +#define _NAKED_ENTRY(name) _ENTRY(name) +#else +#define _ENTRY(name) \ + .text; \ + .p2align 4; \ + .globl name; \ + .type name,@function; \ +name: \ + .cfi_startproc; \ + addis %r2, %r12, (.TOC.-name)@ha; \ + addi %r2, %r2, (.TOC.-name)@l; \ + .localentry name, .-name; + +/* "Naked" function entry. No TOC prologue for ELFv2. */ +#define _NAKED_ENTRY(name) \ + .text; \ + .p2align 4; \ + .globl name; \ + .type name,@function; \ +name: \ + .cfi_startproc; \ + .localentry name, .-name; +#endif + +#define _END(name) \ + .cfi_endproc; \ + .long 0; \ + .byte 0,0,0,0,0,0,0,0; \ + END_SIZE(name) + +#define LOAD_ADDR(reg, var) \ + lis reg, var@highest; \ + ori reg, reg, var@higher; \ + rldicr reg, reg, 32, 31; \ + oris reg, reg, var@h; \ + ori reg, reg, var@l; +#else /* !__powerpc64__ */ +#define _ENTRY(name) \ + .text; \ + .p2align 4; \ + .globl name; \ + .type name,@function; \ +name: \ + .cfi_startproc +#define _END(name) \ + .cfi_endproc; \ + .size name, . - name + +#define _NAKED_ENTRY(name) _ENTRY(name) + +#define LOAD_ADDR(reg, var) \ + lis reg, var@ha; \ + ori reg, reg, var@l; +#endif /* __powerpc64__ */ + +#if defined(PROF) || (defined(_KERNEL) && defined(GPROF)) +# ifdef __powerpc64__ +# define _PROF_PROLOGUE mflr 0; \ + std 3,48(1); \ + std 4,56(1); \ + std 5,64(1); \ + std 0,16(1); \ + stdu 1,-112(1); \ + bl _mcount; \ + nop; \ + ld 0,112+16(1); \ + ld 3,112+48(1); \ + ld 4,112+56(1); \ + ld 5,112+64(1); \ + mtlr 0; \ + addi 1,1,112 +# else +# define _PROF_PROLOGUE mflr 0; stw 0,4(1); bl _mcount +# endif +#else +# define _PROF_PROLOGUE +#endif + +#define ASEND(y) _END(ASMNAME(y)) +#define ASENTRY(y) _ENTRY(ASMNAME(y)); _PROF_PROLOGUE +#define END(y) _END(CNAME(y)) +#define ENTRY(y) _ENTRY(CNAME(y)); _PROF_PROLOGUE +#define GLOBAL(y) _GLOBAL(CNAME(y)) + +#define ASENTRY_NOPROF(y) _ENTRY(ASMNAME(y)) +#define ENTRY_NOPROF(y) _ENTRY(CNAME(y)) + +/* Load NIA without affecting branch prediction */ +#define LOAD_LR_NIA bcl 20, 31, .+4 + +/* + * Magic sequence to return to native endian. + * Overwrites r0 and r11. + * + * The encoding of the instruction "tdi 0, %r0, 0x48" in opposite endian + * happens to be "b . + 8". This is useful because we can write a sequence + * of instructions that can execute in either endian. + * + * Use a sequence of handcoded instructions that switches contexts to the + * instruction following the sequence, but with the correct PSL_LE bit. + * + * The same sequence works for both BE and LE because the xori will flip + * the bit to the other state, and the code only runs when running in the + * wrong endian. + * + * This sequence is NMI-reentrant. + * + * Do not change the length of this sequence without looking at the users, + * this is used in size-constrained places like the reset vector! + */ +#define RETURN_TO_NATIVE_ENDIAN \ + tdi 0, %r0, 0x48; /* Endian swapped: b . + 8 */\ + b 1f; /* Will fall through to here if correct */\ + .long 0xa600607d; /* mfmsr %r11 */\ + .long 0x00000038; /* li %r0, 0 */\ + .long 0x6401617d; /* mtmsrd %r0, 1 (L=1 EE,RI bits only) */\ + .long 0x01006b69; /* xori %r11, %r11, 0x1 (PSL_LE) */\ + .long 0xa602087c; /* mflr %r0 */\ + .long 0x05009f42; /* LOAD_LR_NIA */\ + .long 0xa6037b7d; /* 0: mtsrr1 %r11 */\ + .long 0xa602687d; /* mflr %r11 */\ + .long 0x18006b39; /* addi %r11, %r11, (1f - 0b) */\ + .long 0xa6037a7d; /* mtsrr0 %r11 */\ + .long 0xa603087c; /* mtlr %r0 */\ + .long 0x2400004c; /* rfid */\ +1: /* RETURN_TO_NATIVE_ENDIAN */ + +#define ASMSTR .asciz + +#define RCSID(x) .text; .asciz x + +#undef __FBSDID +#if !defined(lint) && !defined(STRIP_FBSDID) +#define __FBSDID(s) .ident s +#else +#define __FBSDID(s) /* nothing */ +#endif /* not lint and not STRIP_FBSDID */ + +#define WEAK_REFERENCE(sym, alias) \ + .weak alias; \ + .equ alias,sym + +#ifdef __STDC__ +#define WARN_REFERENCES(_sym,_msg) \ + .section .gnu.warning. ## _sym ; .ascii _msg ; .text +#else +#define WARN_REFERENCES(_sym,_msg) \ + .section .gnu.warning./**/_sym ; .ascii _msg ; .text +#endif /* __STDC__ */ + +#endif /* !_MACHINE_ASM_H_ */ |