kickstart.S revision 1.1
1 1.1 is /* $NetBSD: kickstart.S,v 1.1 1999/11/28 22:10:48 is Exp $ */ 2 1.1 is 3 1.1 is /* 4 1.1 is * Copyright (C) 1998 Ignatios Souvatzis. All rights reserved. 5 1.1 is */ 6 1.1 is 7 1.1 is #define PPC_CACHESIZE 16384 8 1.1 is #define PPC_LINESIZE 32 9 1.1 is 10 1.1 is /* 11 1.1 is Memst: .long 0x08000000 12 1.1 is Krnst: .long 0x082f3400 13 1.1 is Krnsz: .long 0x00100000 14 1.1 is */ 15 1.1 is .globl _start 16 1.1 is _start: 17 1.1 is bl L2 /* we start with this address @ 0xfff00100 */ 18 1.1 is L2: 19 1.1 is lis 13,0xf60000@ha 20 1.1 is li 14,0x08 21 1.1 is stb 14,0xf60000@l(13) 22 1.1 is #ifdef DEBUG 23 1.1 is lis 13,0xdff180@h 24 1.1 is ori 13,13,0xdff180@l 25 1.1 is 26 1.1 is lis 12,1000000@h 27 1.1 is ori 12,12,1000000@l 28 1.1 is mtctr 12 29 1.1 is L2a: 30 1.1 is li 14,0x00f 31 1.1 is sth 14,0(13) 32 1.1 is sync 33 1.1 is li 14,0xf0f 34 1.1 is sth 14,0(13) 35 1.1 is sync 36 1.1 is bdnz L2a 37 1.1 is #endif 38 1.1 is mflr 3 39 1.1 is lwz 4,-16(3) 40 1.1 is lwz 5,-12(3) 41 1.1 is lwz 6,-8(3) 42 1.1 is li 7,3 43 1.1 is addi 8,6,3 44 1.1 is cmplw 4,5 45 1.1 is andc 8,8,7 46 1.1 is srwi 9,8,2 47 1.1 is mtctr 9 48 1.1 is bgt Lb0 49 1.1 is /* here: copying downwards and forwards */ 50 1.1 is lwz 9,0(5) 51 1.1 is stw 9,0(4) 52 1.1 is bdz Lflush 53 1.1 is Lf1: lwzu 7,4(5) 54 1.1 is stwu 7,4(4) 55 1.1 is bdnz Lf1 56 1.1 is b Lflush 57 1.1 is 58 1.1 is Lb0: add 4,4,8 /* add the rounded up length */ 59 1.1 is add 5,5,8 /* add the rounded up length */ 60 1.1 is Lb1: lwzu 7,-4(5) 61 1.1 is stwu 7,-4(4) 62 1.1 is bdnz Lb1 63 1.1 is 64 1.1 is Lflush: 65 1.1 is #ifdef DEBUG 66 1.1 is li 14,0xff0 67 1.1 is sth 14,0(13) 68 1.1 is sync 69 1.1 is #endif 70 1.1 is li 10,PPC_CACHESIZE/PPC_LINESIZE 71 1.1 is li 11,PPC_LINESIZE 72 1.1 is /* dcbst loop */ 73 1.1 is mtctr 10 74 1.1 is lwz 12,-8(3) 75 1.1 is Lfl1: dcbst 0,12 76 1.1 is add 12,12,11 77 1.1 is bdnz Lfl1 78 1.1 is sync /* and wait for past instructions to finish */ 79 1.1 is /* icbi loop */ 80 1.1 is mtctr 10 81 1.1 is lwz 12,-8(3) 82 1.1 is Lfl2: icbi 0,12 83 1.1 is add 12,12,11 84 1.1 is bdnz Lfl2 85 1.1 is sync /* and wait for past instructions to finish */ 86 1.1 is isync /* and flush instruction queue */ 87 1.1 is Ljump: 88 1.1 is #ifdef DEBUG 89 1.1 is li 14,0x0f0 90 1.1 is sth 14,0(13) 91 1.1 is sync 92 1.1 is #endif 93 1.1 is lwz 3,-16(3) 94 1.1 is mtlr 3 95 1.1 is blr 96 1.1 is /* NOTREACHED */ 97
Indexes created Sat Nov 01 05:10:12 GMT 2025