start.S revision 1.1.2.2
1 1.1.2.2 nathanw /* $NetBSD: start.S,v 1.1.2.2 2002/11/11 22:03:43 nathanw Exp $ */ 2 1.1.2.2 nathanw 3 1.1.2.2 nathanw /* 4 1.1.2.2 nathanw * Copyright 2000, 2001 5 1.1.2.2 nathanw * Broadcom Corporation. All rights reserved. 6 1.1.2.2 nathanw * 7 1.1.2.2 nathanw * This software is furnished under license and may be used and copied only 8 1.1.2.2 nathanw * in accordance with the following terms and conditions. Subject to these 9 1.1.2.2 nathanw * conditions, you may download, copy, install, use, modify and distribute 10 1.1.2.2 nathanw * modified or unmodified copies of this software in source and/or binary 11 1.1.2.2 nathanw * form. No title or ownership is transferred hereby. 12 1.1.2.2 nathanw * 13 1.1.2.2 nathanw * 1) Any source code used, modified or distributed must reproduce and 14 1.1.2.2 nathanw * retain this copyright notice and list of conditions as they appear in 15 1.1.2.2 nathanw * the source file. 16 1.1.2.2 nathanw * 17 1.1.2.2 nathanw * 2) No right is granted to use any trade name, trademark, or logo of 18 1.1.2.2 nathanw * Broadcom Corporation. Neither the "Broadcom Corporation" name nor any 19 1.1.2.2 nathanw * trademark or logo of Broadcom Corporation may be used to endorse or 20 1.1.2.2 nathanw * promote products derived from this software without the prior written 21 1.1.2.2 nathanw * permission of Broadcom Corporation. 22 1.1.2.2 nathanw * 23 1.1.2.2 nathanw * 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR IMPLIED 24 1.1.2.2 nathanw * WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF 25 1.1.2.2 nathanw * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR 26 1.1.2.2 nathanw * NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM BE LIABLE 27 1.1.2.2 nathanw * FOR ANY DAMAGES WHATSOEVER, AND IN PARTICULAR, BROADCOM SHALL NOT BE 28 1.1.2.2 nathanw * LIABLE FOR DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 29 1.1.2.2 nathanw * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 30 1.1.2.2 nathanw * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 31 1.1.2.2 nathanw * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 32 1.1.2.2 nathanw * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 33 1.1.2.2 nathanw * OR OTHERWISE), EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 1.1.2.2 nathanw */ 35 1.1.2.2 nathanw 36 1.1.2.2 nathanw #define STACK_SIZE 8192 37 1.1.2.2 nathanw 38 1.1.2.2 nathanw #include "include/asm.h" 39 1.1.2.2 nathanw 40 1.1.2.2 nathanw 41 1.1.2.2 nathanw .bss 42 1.1.2.2 nathanw 43 1.1.2.2 nathanw .comm stack_bottom,STACK_SIZE 44 1.1.2.2 nathanw 45 1.1.2.2 nathanw .text 46 1.1.2.2 nathanw 47 1.1.2.2 nathanw LEAF(start) 48 1.1.2.2 nathanw 49 1.1.2.2 nathanw la gp,_gp 50 1.1.2.2 nathanw 51 1.1.2.2 nathanw la sp,stack_bottom+STACK_SIZE-32 52 1.1.2.2 nathanw 53 1.1.2.2 nathanw /* 54 1.1.2.2 nathanw * On entry: a0 = the firmware handle, a2 = firmware's 55 1.1.2.2 nathanw * for secondary bootstraps, a1 is the booted device handle 56 1.1.2.2 nathanw * Don't trash a0..a3 until main is called! 57 1.1.2.2 nathanw */ 58 1.1.2.2 nathanw 59 1.1.2.2 nathanw 60 1.1.2.2 nathanw #if defined(STANDALONE_PROGRAM) 61 1.1.2.2 nathanw /* 62 1.1.2.2 nathanw * This should not be used anywhere. 63 1.1.2.2 nathanw */ 64 1.1.2.2 nathanw 65 1.1.2.2 nathanw #error "don't do this." 66 1.1.2.2 nathanw 67 1.1.2.2 nathanw #else /* defined(STANDALONE_PROGRAM) */ 68 1.1.2.2 nathanw 69 1.1.2.2 nathanw #if !defined(PRIMARY_BOOTBLOCK) && !defined(UNIFIED_BOOTBLOCK) 70 1.1.2.2 nathanw 71 1.1.2.2 nathanw la sp,start 72 1.1.2.2 nathanw 73 1.1.2.2 nathanw #endif /* !defined(PRIMARY_BOOTBLOCK) && !defined(UNIFIED_BOOTBLOCK) */ 74 1.1.2.2 nathanw 75 1.1.2.2 nathanw #endif /* defined(STANDALONE_PROGRAM) */ 76 1.1.2.2 nathanw 77 1.1.2.2 nathanw /* 78 1.1.2.2 nathanw * Zero BSS 79 1.1.2.2 nathanw */ 80 1.1.2.2 nathanw 81 1.1.2.2 nathanw la t0,_edata /* t0 = address */ 82 1.1.2.2 nathanw la t1,_end 83 1.1.2.2 nathanw 84 1.1.2.2 nathanw 1: sw zero,0(t0) 85 1.1.2.2 nathanw sw zero,4(t0) 86 1.1.2.2 nathanw sw zero,8(t0) 87 1.1.2.2 nathanw sw zero,16(t0) 88 1.1.2.2 nathanw add t0,16 89 1.1.2.2 nathanw ble t0,t1,1b 90 1.1.2.2 nathanw 91 1.1.2.2 nathanw 92 1.1.2.2 nathanw /* 93 1.1.2.2 nathanw * Run the main program. 94 1.1.2.2 nathanw */ 95 1.1.2.2 nathanw 96 1.1.2.2 nathanw jal main /* transfer to C */ 97 1.1.2.2 nathanw 98 1.1.2.2 nathanw XLEAF(halt) 99 1.1.2.2 nathanw li t0,0xBFC00000 /* transfer back to firmware */ 100 1.1.2.2 nathanw j t0 101 1.1.2.2 nathanw END(start) 102 1.1.2.2 nathanw 103 1.1.2.2 nathanw 104 1.1.2.2 nathanw 105 1.1.2.2 nathanw LEAF(__main) 106 1.1.2.2 nathanw j ra 107 1.1.2.2 nathanw END(__main) 108 1.1.2.2 nathanw 109 1.1.2.2 nathanw LEAF(_rtt) 110 1.1.2.2 nathanw li t0,0xBFC00000 111 1.1.2.2 nathanw j t0 112 1.1.2.2 nathanw END(_rtt) 113
Indexes created Sun Oct 19 02:09:48 GMT 2025