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 512 bytes at symbol 31 * __system_reset_overlay to offset 0x100 of the rom image. This symbol 32 * must occupy 512 or less bytes. 33 * 34 * The PS3 has a single processor with two threads. 35 */ 36 37 .globl __system_reset_overlay 38__system_reset_overlay: 39 40 /* Switch to 32-bit mode. */ 41 42 mfmsr r9 43 clrldi r9,r9,1 44 mtmsrd r9 45 nop 46 47 /* Get thread number in r3 and branch. */ 48 49 mfspr r3, 0x88 50 cntlzw. r3, r3 51 beq 1f 52 53 /* Secondary goes to __secondary_hold in kernel. */ 54 55 li r4, 0x60 56 mtctr r4 57 bctr 58 591: 60 /* Save the value at addr zero for a null pointer write check later. */ 61 62 li r4, 0 63 lwz r3, 0(r4) 64 65 /* Primary delays then goes to _zimage_start in wrapper. */ 66 67 or 31, 31, 31 /* db16cyc */ 68 or 31, 31, 31 /* db16cyc */ 69 70 lis r4, _zimage_start@ha 71 addi r4, r4, _zimage_start@l 72 mtctr r4 73 bctr 74 75 . = __system_reset_overlay + 512 76 77/* 78 * __system_reset_kernel - Place holder for the kernel reset vector. 79 * 80 * The bootwrapper build script copies 512 bytes from offset 0x100 81 * of the rom image to the symbol __system_reset_kernel. At runtime 82 * the bootwrapper program copies the 512 bytes at __system_reset_kernel 83 * to ram address 0x100. This symbol must occupy 512 bytes. 84 */ 85 86 .globl __system_reset_kernel 87__system_reset_kernel: 88 89 . = __system_reset_kernel + 512 90