1/* $FreeBSD$ */ 2 3/*- 4 * Copyright (C) 2010-2016 Nathan Whitehorn 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28#include "assym.inc" 29 30#include <sys/syscall.h> 31 32#include <machine/trap.h> 33#include <machine/param.h> 34#include <machine/spr.h> 35#include <machine/asm.h> 36#include <machine/vmparam.h> 37#include "opt_platform.h" 38 39/* Locate the per-CPU data structure */ 40#define GET_CPUINFO(r) \ 41 mfsprg0 r 42 43/* 44 * Compiled KERNBASE location and the kernel load address 45 */ 46 .globl kernbase 47 .set kernbase, KERNBASE 48 49/* 50 * Globals 51 */ 52 .data 53 .align 3 54GLOBAL(__startkernel) 55 .long begin 56GLOBAL(__endkernel) 57 .long end 58 .align 4 59#define TMPSTKSZ 8192 /* 8K temporary stack */ 60GLOBAL(tmpstk) 61 .space TMPSTKSZ 62 63 .text 64 .globl btext 65btext: 66 67/* 68 * Main kernel entry point. 69 */ 70 .text 71 .globl __start 72__start: 73 /* Figure out where we are */ 74 bl 1f 75 .long _DYNAMIC-. 76 .long _GLOBAL_OFFSET_TABLE_-. 77 .long tmpstk-. 781: mflr %r30 79 80 /* Set up temporary stack pointer */ 81 lwz %r1,8(%r30) 82 add %r1,%r1,%r30 83 addi %r1,%r1,(8+TMPSTKSZ-40) 84 85 /* Relocate self */ 86 stw %r3,16(%r1) 87 stw %r4,20(%r1) 88 stw %r5,24(%r1) 89 stw %r6,28(%r1) 90 stw %r7,32(%r1) 91 92 lwz %r3,0(%r30) /* _DYNAMIC in %r3 */ 93 add %r3,%r3,%r30 94 lwz %r4,4(%r30) /* GOT pointer */ 95 add %r4,%r4,%r30 96 lwz %r4,4(%r4) /* got[0] is _DYNAMIC link addr */ 97 subf %r4,%r4,%r3 /* subtract to calculate relocbase */ 98 bl elf_reloc_self 99 100 lwz %r3,16(%r1) 101 lwz %r4,20(%r1) 102 lwz %r5,24(%r1) 103 lwz %r6,28(%r1) 104 lwz %r7,32(%r1) 105 106 /* MD setup */ 107 bl powerpc_init 108 109 /* Set stack pointer to new value and branch to mi_startup */ 110 mr %r1, %r3 111 li %r3, 0 112 stw %r3, 0(%r1) 113 bl mi_startup 114 115 /* mi_startup() does not return */ 116 b . 117 118#include <powerpc/aim/trap_subr32.S> 119