iris_start.S revision 1.1.2.2
1 1.1.2.2 pgoyette /* $NetBSD: iris_start.S,v 1.1.2.2 2019/01/18 08:50:23 pgoyette Exp $ */ 2 1.1.2.2 pgoyette 3 1.1.2.2 pgoyette /* 4 1.1.2.2 pgoyette * Copyright (c) 2018 Naruaki Etomi 5 1.1.2.2 pgoyette * All rights reserved. 6 1.1.2.2 pgoyette * 7 1.1.2.2 pgoyette * Redistribution and use in source and binary forms, with or without 8 1.1.2.2 pgoyette * modification, are permitted provided that the following conditions 9 1.1.2.2 pgoyette * are met: 10 1.1.2.2 pgoyette * 1. Redistributions of source code must retain the above copyright 11 1.1.2.2 pgoyette * notice, this list of conditions and the following disclaimer. 12 1.1.2.2 pgoyette * 2. Redistributions in binary form must reproduce the above copyright 13 1.1.2.2 pgoyette * notice, this list of conditions and the following disclaimer in the 14 1.1.2.2 pgoyette * documentation and/or other materials provided with the distribution. 15 1.1.2.2 pgoyette * 16 1.1.2.2 pgoyette * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 1.1.2.2 pgoyette * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 1.1.2.2 pgoyette * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 1.1.2.2 pgoyette * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 1.1.2.2 pgoyette * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 1.1.2.2 pgoyette * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 1.1.2.2 pgoyette * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 1.1.2.2 pgoyette * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 1.1.2.2 pgoyette * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 1.1.2.2 pgoyette * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 1.1.2.2 pgoyette */ 27 1.1.2.2 pgoyette 28 1.1.2.2 pgoyette /* 29 1.1.2.2 pgoyette * Silicon Graphics "IRIS" series MIPS processors machine bootloader. 30 1.1.2.2 pgoyette */ 31 1.1.2.2 pgoyette 32 1.1.2.2 pgoyette #include <mips/asm.h> 33 1.1.2.2 pgoyette #include <mips/cpuregs.h> 34 1.1.2.2 pgoyette 35 1.1.2.2 pgoyette .globl start 36 1.1.2.2 pgoyette start: 37 1.1.2.2 pgoyette .set noreorder 38 1.1.2.2 pgoyette #ifdef __GP_SUPPORT__ 39 1.1.2.2 pgoyette la gp, _C_LABEL(_gp) 40 1.1.2.2 pgoyette #endif 41 1.1.2.2 pgoyette /* 42 1.1.2.2 pgoyette * We assume the bootprom isn't expecting us to preserve the saved 43 1.1.2.2 pgoyette * registers. 44 1.1.2.2 pgoyette */ 45 1.1.2.2 pgoyette move s0, a0 # save argc 46 1.1.2.2 pgoyette move s1, a1 # save argv 47 1.1.2.2 pgoyette move s2, a2 # save envp 48 1.1.2.2 pgoyette move s3, ra # save RA 49 1.1.2.2 pgoyette 50 1.1.2.2 pgoyette la a0, _C_LABEL(edata) # clear BSS 51 1.1.2.2 pgoyette move a1, zero 52 1.1.2.2 pgoyette la a2, _C_LABEL(end) 53 1.1.2.2 pgoyette jal _C_LABEL(memset) # memset(edata, 0, end - edata) 54 1.1.2.2 pgoyette subu a2, a2, a0 55 1.1.2.2 pgoyette 56 1.1.2.2 pgoyette move a0, s0 # restore argc 57 1.1.2.2 pgoyette move a1, s1 # restore argv 58 1.1.2.2 pgoyette move a2, s2 # restore envp 59 1.1.2.2 pgoyette j _C_LABEL(main) # main(argc, argv) 60 1.1.2.2 pgoyette move ra, s3 # restore RA 61 1.1.2.2 pgoyette 62 1.1.2.2 pgoyette LEAF(romrestart) 63 1.1.2.2 pgoyette XLEAF(_rtt) 64 1.1.2.2 pgoyette PTR_LA v0, 0xBFC00000 # indigo RESET 65 1.1.2.2 pgoyette j v0 66 1.1.2.2 pgoyette nop 67 1.1.2.2 pgoyette END(romrestart) 68
Indexes created Thu Oct 02 07:10:07 GMT 2025