1/* 2 * PS3 bootwrapper entry. 3 * 4 * Copyright (C) 2007 Sony Computer Entertainment Inc. 5 * Copyright 2007 Sony Corp. 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; version 2 of the License. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 */ 20 21#include "ppc_asm.h" 22 23 .text 24 25/* 26 * __system_reset_overlay - The PS3 first stage entry. 27 * 28 * The bootwraper build script copies the 0x100 bytes at symbol 29 * __system_reset_overlay to offset 0x100 of the rom image. 30 * 31 * The PS3 has a single processor with two threads. 32 */ 33 34 .globl __system_reset_overlay 35__system_reset_overlay: 36 37 /* Switch to 32-bit mode. */ 38 39 mfmsr r9 40 clrldi r9,r9,1 41 mtmsrd r9 42 nop 43 44 /* Get thread number in r3 and branch. */ 45 46 mfspr r3, 0x88 47 cntlzw. r3, r3 48 li r4, 0 49 li r5, 0 50 beq 1f 51 52 /* Secondary goes to __secondary_hold in kernel. */ 53 54 li r4, 0x60 55 mtctr r4 56 bctr 57 58 /* Primary delays then goes to _zimage_start in wrapper. */ 591: 60 or 31, 31, 31 /* db16cyc */ 61 or 31, 31, 31 /* db16cyc */ 62 63 lis r4, _zimage_start@ha 64 addi r4, r4, _zimage_start@l 65 mtctr r4 66 bctr 67 68/* 69 * __system_reset_kernel - Place holder for the kernel reset vector. 70 * 71 * The bootwrapper build script copies 0x100 bytes from offset 0x100 72 * of the rom image to the symbol __system_reset_kernel. At runtime 73 * the bootwrapper program copies the 0x100 bytes at __system_reset_kernel 74 * to ram address 0x100. This symbol must occupy 0x100 bytes. 75 */ 76 77 .globl __system_reset_kernel 78__system_reset_kernel: 79 80 . = __system_reset_kernel + 0x100 81