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 .machine "ppc64" 24 25 .text 26 27/* 28 * __system_reset_overlay - The PS3 first stage entry. 29 * 30 * The bootwraper build script copies the 0x100 bytes at symbol 31 * __system_reset_overlay to offset 0x100 of the rom image. 32 * 33 * The PS3 has a single processor with two threads. 34 */ 35 36 .globl __system_reset_overlay 37__system_reset_overlay: 38 39 /* Switch to 32-bit mode. */ 40 41 mfmsr r9 42 clrldi r9,r9,1 43 mtmsrd r9 44 nop 45 46 /* Get thread number in r3 and branch. */ 47 48 mfspr r3, 0x88 49 cntlzw. r3, r3 50 li r4, 0 51 li r5, 0 52 beq 1f 53 54 /* Secondary goes to __secondary_hold in kernel. */ 55 56 li r4, 0x60 57 mtctr r4 58 bctr 59 60 /* Primary delays then goes to _zimage_start in wrapper. */ 611: 62 or 31, 31, 31 /* db16cyc */ 63 or 31, 31, 31 /* db16cyc */ 64 65 lis r4, _zimage_start@ha 66 addi r4, r4, _zimage_start@l 67 mtctr r4 68 bctr 69 70/* 71 * __system_reset_kernel - Place holder for the kernel reset vector. 72 * 73 * The bootwrapper build script copies 0x100 bytes from offset 0x100 74 * of the rom image to the symbol __system_reset_kernel. At runtime 75 * the bootwrapper program copies the 0x100 bytes at __system_reset_kernel 76 * to ram address 0x100. This symbol must occupy 0x100 bytes. 77 */ 78 79 .globl __system_reset_kernel 80__system_reset_kernel: 81 82 . = __system_reset_kernel + 0x100 83