[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / powerpc / boot / ps3-head.S

/*
 *  PS3 bootwrapper entry.
 *
 *  Copyright (C) 2007 Sony Computer Entertainment Inc.
 *  Copyright 2007 Sony Corp.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; version 2 of the License.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "ppc_asm.h"

	.machine "ppc64"

	.text

/*
 * __system_reset_overlay - The PS3 first stage entry.
 *
 * The bootwraper build script copies the 512 bytes at symbol
 * __system_reset_overlay to offset 0x100 of the rom image.  This symbol
 * must occupy 512 or less bytes.
 *
 * The PS3 has a single processor with two threads.
 */

	.globl __system_reset_overlay
__system_reset_overlay:

	/* Switch to 32-bit mode. */

	mfmsr	r9
	clrldi	r9,r9,1
	mtmsrd	r9
	nop

	/* Get thread number in r3 and branch. */

	mfspr	r3, 0x88
	cntlzw.	r3, r3
	beq	1f

	/* Secondary goes to __secondary_hold in kernel. */

	li	r4, 0x60
	mtctr	r4
	bctr

1:
	/* Primary delays then goes to _zimage_start in wrapper. */

	or	31, 31, 31 /* db16cyc */
	or	31, 31, 31 /* db16cyc */

	lis	r4, _zimage_start@ha
	addi	r4, r4, _zimage_start@l
	mtctr	r4
	bctr

	. = __system_reset_overlay + 512

/*
 * __system_reset_kernel - Place holder for the kernel reset vector.
 *
 * The bootwrapper build script copies 512 bytes from offset 0x100
 * of the rom image to the symbol __system_reset_kernel.  At runtime
 * the bootwrapper program copies the 512 bytes at __system_reset_kernel
 * to ram address 0x100.  This symbol must occupy 512 bytes.
 */

	.globl __system_reset_kernel
__system_reset_kernel:

	. = __system_reset_kernel + 512
Commit	Line	Data
bafdb645 GL	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
24ed8559 GL	23	.machine "ppc64"
24ed8559 GL	24
bafdb645 GL	25	.text
	26
	27	/*
	28	* __system_reset_overlay - The PS3 first stage entry.
	29	*
5761eaa3 GL	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.
bafdb645 GL	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
bafdb645 GL	51	beq 1f
	52
	53	/* Secondary goes to __secondary_hold in kernel. */
	54
	55	li r4, 0x60
	56	mtctr r4
	57	bctr
	58
bafdb645	59	1:
5761eaa3 GL	60	/* Primary delays then goes to _zimage_start in wrapper. */
5761eaa3 GL	61
bafdb645 GL	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
5761eaa3 GL	70	. = __system_reset_overlay + 512
5761eaa3 GL	71
bafdb645 GL	72	/*
	73	* __system_reset_kernel - Place holder for the kernel reset vector.
	74	*
5761eaa3	75	* The bootwrapper build script copies 512 bytes from offset 0x100
bafdb645	76	* of the rom image to the symbol __system_reset_kernel. At runtime
5761eaa3 GL	77	* the bootwrapper program copies the 512 bytes at __system_reset_kernel
5761eaa3 GL	78	* to ram address 0x100. This symbol must occupy 512 bytes.
bafdb645 GL	79	*/
	80
	81	.globl __system_reset_kernel
	82	__system_reset_kernel:
	83
5761eaa3	84	. = __system_reset_kernel + 512