start.S revision 1.1.1.1.4.2
1 1.1.1.1.4.2 martin /* $NetBSD: start.S,v 1.1.1.1.4.2 2017/08/30 15:45:04 martin Exp $ */ 2 1.1.1.1.4.2 martin 3 1.1.1.1.4.2 martin /* 4 1.1.1.1.4.2 martin * Copyright 2000, 2001 5 1.1.1.1.4.2 martin * Broadcom Corporation. All rights reserved. 6 1.1.1.1.4.2 martin * 7 1.1.1.1.4.2 martin * This software is furnished under license and may be used and copied only 8 1.1.1.1.4.2 martin * in accordance with the following terms and conditions. Subject to these 9 1.1.1.1.4.2 martin * conditions, you may download, copy, install, use, modify and distribute 10 1.1.1.1.4.2 martin * modified or unmodified copies of this software in source and/or binary 11 1.1.1.1.4.2 martin * form. No title or ownership is transferred hereby. 12 1.1.1.1.4.2 martin * 13 1.1.1.1.4.2 martin * 1) Any source code used, modified or distributed must reproduce and 14 1.1.1.1.4.2 martin * retain this copyright notice and list of conditions as they appear in 15 1.1.1.1.4.2 martin * the source file. 16 1.1.1.1.4.2 martin * 17 1.1.1.1.4.2 martin * 2) No right is granted to use any trade name, trademark, or logo of 18 1.1.1.1.4.2 martin * Broadcom Corporation. The "Broadcom Corporation" name may not be 19 1.1.1.1.4.2 martin * used to endorse or promote products derived from this software 20 1.1.1.1.4.2 martin * without the prior written permission of Broadcom Corporation. 21 1.1.1.1.4.2 martin * 22 1.1.1.1.4.2 martin * 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR IMPLIED 23 1.1.1.1.4.2 martin * WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF 24 1.1.1.1.4.2 martin * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR 25 1.1.1.1.4.2 martin * NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM BE LIABLE 26 1.1.1.1.4.2 martin * FOR ANY DAMAGES WHATSOEVER, AND IN PARTICULAR, BROADCOM SHALL NOT BE 27 1.1.1.1.4.2 martin * LIABLE FOR DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 1.1.1.1.4.2 martin * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 1.1.1.1.4.2 martin * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 30 1.1.1.1.4.2 martin * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 31 1.1.1.1.4.2 martin * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 32 1.1.1.1.4.2 martin * OR OTHERWISE), EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 1.1.1.1.4.2 martin */ 34 1.1.1.1.4.2 martin 35 1.1.1.1.4.2 martin #define STACK_SIZE 8192 36 1.1.1.1.4.2 martin 37 1.1.1.1.4.2 martin #include "include/asm.h" 38 1.1.1.1.4.2 martin 39 1.1.1.1.4.2 martin 40 1.1.1.1.4.2 martin .bss 41 1.1.1.1.4.2 martin 42 1.1.1.1.4.2 martin .comm stack_bottom,STACK_SIZE 43 1.1.1.1.4.2 martin 44 1.1.1.1.4.2 martin .text 45 1.1.1.1.4.2 martin 46 1.1.1.1.4.2 martin LEAF(start) 47 1.1.1.1.4.2 martin 48 1.1.1.1.4.2 martin la gp,_gp 49 1.1.1.1.4.2 martin 50 1.1.1.1.4.2 martin la sp,stack_bottom+STACK_SIZE-32 51 1.1.1.1.4.2 martin 52 1.1.1.1.4.2 martin /* 53 1.1.1.1.4.2 martin * On entry: a0 = the firmware handle, a2 = firmware's 54 1.1.1.1.4.2 martin * for secondary bootstraps, a1 is the booted device handle 55 1.1.1.1.4.2 martin * Don't trash a0..a3 until main is called! 56 1.1.1.1.4.2 martin */ 57 1.1.1.1.4.2 martin 58 1.1.1.1.4.2 martin 59 1.1.1.1.4.2 martin #if defined(STANDALONE_PROGRAM) 60 1.1.1.1.4.2 martin /* 61 1.1.1.1.4.2 martin * This should not be used anywhere. 62 1.1.1.1.4.2 martin */ 63 1.1.1.1.4.2 martin 64 1.1.1.1.4.2 martin #error "don't do this." 65 1.1.1.1.4.2 martin 66 1.1.1.1.4.2 martin #else /* defined(STANDALONE_PROGRAM) */ 67 1.1.1.1.4.2 martin 68 1.1.1.1.4.2 martin #if !defined(PRIMARY_BOOTBLOCK) && !defined(UNIFIED_BOOTBLOCK) 69 1.1.1.1.4.2 martin 70 1.1.1.1.4.2 martin la sp,start 71 1.1.1.1.4.2 martin 72 1.1.1.1.4.2 martin #endif /* !defined(PRIMARY_BOOTBLOCK) && !defined(UNIFIED_BOOTBLOCK) */ 73 1.1.1.1.4.2 martin 74 1.1.1.1.4.2 martin #endif /* defined(STANDALONE_PROGRAM) */ 75 1.1.1.1.4.2 martin 76 1.1.1.1.4.2 martin /* 77 1.1.1.1.4.2 martin * Zero BSS 78 1.1.1.1.4.2 martin */ 79 1.1.1.1.4.2 martin 80 1.1.1.1.4.2 martin la t0,_edata /* t0 = address */ 81 1.1.1.1.4.2 martin la t1,_end 82 1.1.1.1.4.2 martin 83 1.1.1.1.4.2 martin 1: sw zero,0(t0) 84 1.1.1.1.4.2 martin sw zero,4(t0) 85 1.1.1.1.4.2 martin sw zero,8(t0) 86 1.1.1.1.4.2 martin sw zero,16(t0) 87 1.1.1.1.4.2 martin add t0,16 88 1.1.1.1.4.2 martin ble t0,t1,1b 89 1.1.1.1.4.2 martin 90 1.1.1.1.4.2 martin 91 1.1.1.1.4.2 martin /* 92 1.1.1.1.4.2 martin * Run the main program. 93 1.1.1.1.4.2 martin */ 94 1.1.1.1.4.2 martin 95 1.1.1.1.4.2 martin jal main /* transfer to C */ 96 1.1.1.1.4.2 martin 97 1.1.1.1.4.2 martin XLEAF(halt) 98 1.1.1.1.4.2 martin li t0,0xBFC00000 /* transfer back to firmware */ 99 1.1.1.1.4.2 martin j t0 100 1.1.1.1.4.2 martin END(start) 101 1.1.1.1.4.2 martin 102 1.1.1.1.4.2 martin 103 1.1.1.1.4.2 martin 104 1.1.1.1.4.2 martin LEAF(__main) 105 1.1.1.1.4.2 martin j ra 106 1.1.1.1.4.2 martin END(__main) 107 1.1.1.1.4.2 martin 108 1.1.1.1.4.2 martin LEAF(_rtt) 109 1.1.1.1.4.2 martin li t0,0xBFC00000 110 1.1.1.1.4.2 martin j t0 111 1.1.1.1.4.2 martin END(_rtt) 112
Indexes created Wed Oct 22 00:09:40 GMT 2025