1 1.3 isaki /* $NetBSD: exec_image.S,v 1.3 2024/01/07 07:58:34 isaki Exp $ */ 2 1.1 minoura 3 1.1 minoura /* 4 1.1 minoura * Copyright (c) 2001 Minoura Makoto. 5 1.1 minoura * All rights reserved. 6 1.1 minoura * 7 1.1 minoura * Redistribution and use in source and binary forms, with or without 8 1.1 minoura * modification, are permitted provided that the following conditions 9 1.1 minoura * are met: 10 1.1 minoura * 1. Redistributions of source code must retain the above copyright 11 1.1 minoura * notice, this list of conditions and the following disclaimer. 12 1.1 minoura * 2. Redistributions in binary form must reproduce the above copyright 13 1.1 minoura * notice, this list of conditions and the following disclaimer in the 14 1.1 minoura * documentation and/or other materials provided with the distribution. 15 1.1 minoura * 16 1.1 minoura * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 1.1 minoura * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 1.1 minoura * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 1.1 minoura * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 1.1 minoura * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 1.1 minoura * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 1.1 minoura * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 1.1 minoura * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 1.1 minoura * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 1.1 minoura * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 1.1 minoura */ 27 1.1 minoura 28 1.1 minoura #include <machine/asm.h> 29 1.1 minoura 30 1.1 minoura #ifndef LASTADDR 31 1.1 minoura #define LASTADDR (0x00ed0008) 32 1.1 minoura #endif 33 1.1 minoura 34 1.1 minoura .text 35 1.1 minoura .even 36 1.1 minoura 37 1.1 minoura ENTRY_NOPROFILE(exec_image) 38 1.1 minoura || void exec_image(loaded,executed,entry,size,bootdev,boothowto) 39 1.3 isaki || unsigned int loaded; 40 1.1 minoura || unsigned int executed; 41 1.1 minoura || unsigned int entry; 42 1.1 minoura || int size; 43 1.1 minoura || int bootdev; 44 1.1 minoura || int boothowto; 45 1.1 minoura addl #4,%sp | throw away the return address 46 1.1 minoura moveml %sp@+,%a4-%a6 47 1.1 minoura moveml %sp@+,%d5-%d7 48 1.1 minoura 49 1.1 minoura /* copy the trampoline to the last physical page. */ 50 1.1 minoura moval LASTADDR,%sp | tmpstack from end of physmem 51 1.2 minoura lea %sp@(-4096),%a3 | use last phys page as tramp 52 1.1 minoura 53 1.1 minoura movl #(end_trampoline-trampoline),%sp@- 54 1.2 minoura pea %pc@(trampoline) 55 1.2 minoura pea %a3@ 56 1.1 minoura jbsr _C_LABEL(memcpy) | memcpy() is still alive 57 1.2 minoura lea %sp@(12),%sp 58 1.1 minoura 59 1.1 minoura jmp %a3@ | jump to tramp 60 1.1 minoura 61 1.1 minoura ASENTRY_NOPROFILE(trampoline) 62 1.1 minoura || %a4: loaded 63 1.1 minoura || %a5: executed 64 1.1 minoura || %a6: entry 65 1.1 minoura || %d5: size 66 1.1 minoura || %d6: bootdev 67 1.1 minoura || %d7: boothowto 68 1.1 minoura movl %d5,%sp@- | push last arg (esym) 69 1.1 minoura movel LASTADDR,%sp@- | second arg (physsize) 70 1.2 minoura pea %a5@ | first arg (firstpa) 71 1.1 minoura 72 1.1 minoura cmpl %a4,%a5 | if (l == x) 73 1.1 minoura beq L1 | copy not required 74 1.1 minoura 75 1.1 minoura /* this may overwrite the trap vectors; disable interrupt. */ 76 1.1 minoura oriw #0x2700,%sr 77 1.1 minoura 78 1.1 minoura L0: movb %a4@+,%a5@+ | copy kern to x 79 1.1 minoura subql #1,%d5 80 1.1 minoura bne L0 81 1.1 minoura 82 1.1 minoura L1: 83 1.1 minoura movq #0,%d0 | reg arg (unused) 84 1.1 minoura movq #0,%d1 | reg arg (unused) 85 1.1 minoura movq #0,%d2 | reg arg (unused) 86 1.1 minoura movq #0,%d3 | reg arg (unused) 87 1.1 minoura movq #0,%d4 | reg arg (unused) 88 1.1 minoura movq #0,%d5 | reg arg (unused) 89 1.1 minoura | bootdev(%d6) is already set 90 1.1 minoura | boothowto(%d7) is already set 91 1.1 minoura moval %a6,%a0 | entry 92 1.1 minoura moval %d0,%a1 | reg arg (unused) 93 1.1 minoura moval %d0,%a2 | reg arg (unused) 94 1.1 minoura moval %d0,%a3 | reg arg (unused) 95 1.1 minoura moval %d0,%a4 | reg arg (unused) 96 1.1 minoura moval %d0,%a5 | reg arg (unused) 97 1.1 minoura moval %d0,%a6 | reg arg (unused) 98 1.1 minoura movec %a1,%vbr | clear vbr 99 1.1 minoura 100 1.1 minoura jsr %a0@ | here we go! 101 1.1 minoura 102 1.1 minoura /* NOTREACHED */ 103 1.1 minoura end_trampoline: 104
Indexes created Tue Sep 23 14:10:03 GMT 2025