1*4882a593Smuzhiyun/* SPDX-License-Identifier: GPL-2.0-only */ 2*4882a593Smuzhiyun/* 3*4882a593Smuzhiyun * PS3 bootwrapper entry. 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Copyright (C) 2007 Sony Computer Entertainment Inc. 6*4882a593Smuzhiyun * Copyright 2007 Sony Corp. 7*4882a593Smuzhiyun */ 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun#include "ppc_asm.h" 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun .machine "ppc64" 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun .text 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun/* 16*4882a593Smuzhiyun * __system_reset_overlay - The PS3 first stage entry. 17*4882a593Smuzhiyun * 18*4882a593Smuzhiyun * The bootwraper build script copies the 512 bytes at symbol 19*4882a593Smuzhiyun * __system_reset_overlay to offset 0x100 of the rom image. This symbol 20*4882a593Smuzhiyun * must occupy 512 or less bytes. 21*4882a593Smuzhiyun * 22*4882a593Smuzhiyun * The PS3 has a single processor with two threads. 23*4882a593Smuzhiyun */ 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun .globl __system_reset_overlay 26*4882a593Smuzhiyun__system_reset_overlay: 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun /* Switch to 32-bit mode. */ 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun mfmsr r9 31*4882a593Smuzhiyun clrldi r9,r9,1 32*4882a593Smuzhiyun mtmsrd r9 33*4882a593Smuzhiyun nop 34*4882a593Smuzhiyun 35*4882a593Smuzhiyun /* Get thread number in r3 and branch. */ 36*4882a593Smuzhiyun 37*4882a593Smuzhiyun mfspr r3, 0x88 38*4882a593Smuzhiyun cntlzw. r3, r3 39*4882a593Smuzhiyun beq 1f 40*4882a593Smuzhiyun 41*4882a593Smuzhiyun /* Secondary goes to __secondary_hold in kernel. */ 42*4882a593Smuzhiyun 43*4882a593Smuzhiyun li r4, 0x60 44*4882a593Smuzhiyun mtctr r4 45*4882a593Smuzhiyun bctr 46*4882a593Smuzhiyun 47*4882a593Smuzhiyun1: 48*4882a593Smuzhiyun /* Primary delays then goes to _zimage_start in wrapper. */ 49*4882a593Smuzhiyun 50*4882a593Smuzhiyun or 31, 31, 31 /* db16cyc */ 51*4882a593Smuzhiyun or 31, 31, 31 /* db16cyc */ 52*4882a593Smuzhiyun 53*4882a593Smuzhiyun lis r4, _zimage_start@ha 54*4882a593Smuzhiyun addi r4, r4, _zimage_start@l 55*4882a593Smuzhiyun mtctr r4 56*4882a593Smuzhiyun bctr 57*4882a593Smuzhiyun 58*4882a593Smuzhiyun . = __system_reset_overlay + 512 59*4882a593Smuzhiyun 60*4882a593Smuzhiyun/* 61*4882a593Smuzhiyun * __system_reset_kernel - Place holder for the kernel reset vector. 62*4882a593Smuzhiyun * 63*4882a593Smuzhiyun * The bootwrapper build script copies 512 bytes from offset 0x100 64*4882a593Smuzhiyun * of the rom image to the symbol __system_reset_kernel. At runtime 65*4882a593Smuzhiyun * the bootwrapper program copies the 512 bytes at __system_reset_kernel 66*4882a593Smuzhiyun * to ram address 0x100. This symbol must occupy 512 bytes. 67*4882a593Smuzhiyun */ 68*4882a593Smuzhiyun 69*4882a593Smuzhiyun .globl __system_reset_kernel 70*4882a593Smuzhiyun__system_reset_kernel: 71*4882a593Smuzhiyun 72*4882a593Smuzhiyun . = __system_reset_kernel + 512 73