cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ps3-head.S (1475B)


      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 *  PS3 bootwrapper entry.
      4 *
      5 *  Copyright (C) 2007 Sony Computer Entertainment Inc.
      6 *  Copyright 2007 Sony Corp.
      7 */
      8
      9#include "ppc_asm.h"
     10
     11	.machine "ppc64"
     12
     13	.text
     14
     15/*
     16 * __system_reset_overlay - The PS3 first stage entry.
     17 *
     18 * The bootwraper build script copies the 512 bytes at symbol
     19 * __system_reset_overlay to offset 0x100 of the rom image.  This symbol
     20 * must occupy 512 or less bytes.
     21 *
     22 * The PS3 has a single processor with two threads.
     23 */
     24
     25	.globl __system_reset_overlay
     26__system_reset_overlay:
     27
     28	/* Switch to 32-bit mode. */
     29
     30	mfmsr	r9
     31	clrldi	r9,r9,1
     32	mtmsrd	r9
     33	nop
     34
     35	/* Get thread number in r3 and branch. */
     36
     37	mfspr	r3, 0x88
     38	cntlzw.	r3, r3
     39	beq	1f
     40
     41	/* Secondary goes to __secondary_hold in kernel. */
     42
     43	li	r4, 0x60
     44	mtctr	r4
     45	bctr
     46
     471:
     48	/* Primary delays then goes to _zimage_start in wrapper. */
     49
     50	or	31, 31, 31 /* db16cyc */
     51	or	31, 31, 31 /* db16cyc */
     52
     53	lis	r4, _zimage_start@ha
     54	addi	r4, r4, _zimage_start@l
     55	mtctr	r4
     56	bctr
     57
     58	. = __system_reset_overlay + 512
     59
     60/*
     61 * __system_reset_kernel - Place holder for the kernel reset vector.
     62 *
     63 * The bootwrapper build script copies 512 bytes from offset 0x100
     64 * of the rom image to the symbol __system_reset_kernel.  At runtime
     65 * the bootwrapper program copies the 512 bytes at __system_reset_kernel
     66 * to ram address 0x100.  This symbol must occupy 512 bytes.
     67 */
     68
     69	.globl __system_reset_kernel
     70__system_reset_kernel:
     71
     72	. = __system_reset_kernel + 512