metag: Boot

vmlinux*

uImage*

ramdisk.*

*.dtb

/*

 * arch/metag/include/asm/mach/arch.h

 *

 * Copyright (C) 2012 Imagination Technologies Ltd.

 *

 * based on the ARM version:

 *  Copyright (C) 2000 Russell King

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */

#ifndef _METAG_MACH_ARCH_H_

#define _METAG_MACH_ARCH_H_

#include <linux/stddef.h>

/**

 * struct machine_desc - Describes a board controlled by a Meta.

 * @name:		Board/SoC name.

 * @dt_compat:		Array of device tree 'compatible' strings.

 *

 * @nr_irqs:		Maximum number of IRQs.

 *			If 0, defaults to NR_IRQS in asm-generic/irq.h.

 *

 * @init_early:		Early init callback.

 * @init_irq:		IRQ init callback for setting up IRQ controllers.

 * @init_machine:	Arch init callback for setting up devices.

 * @init_late:		Late init callback.

 *

 * This structure is provided by each board which can be controlled by a Meta.

 * It is chosen by matching the compatible strings in the device tree provided

 * by the bootloader with the strings in @dt_compat, and sets up any aspects of

 * the machine that aren't configured with device tree (yet).

 */

struct machine_desc {

	const char		*name;

	const char		**dt_compat;

	unsigned int		nr_irqs;

	void			(*init_early)(void);

	void			(*init_irq)(void);

	void			(*init_machine)(void);

	void			(*init_late)(void);

};

/*

 * Current machine - only accessible during boot.

 */

extern struct machine_desc *machine_desc;

/*

 * Machine type table - also only accessible during boot

 */

extern struct machine_desc __arch_info_begin[], __arch_info_end[];

#define for_each_machine_desc(p)			\

	for (p = __arch_info_begin; p < __arch_info_end; p++)

static inline struct machine_desc *default_machine_desc(void)

{

	/* the default machine is the last one linked in */

	if (__arch_info_end - 1 < __arch_info_begin)

		return NULL;

	return __arch_info_end - 1;

}

/*

 * Set of macros to define architecture features.  This is built into

 * a table by the linker.

 */

#define MACHINE_START(_type, _name)			\

static const struct machine_desc __mach_desc_##_type	\

__used							\

__attribute__((__section__(".arch.info.init"))) = {	\

	.name		= _name,

#define MACHINE_END				\

};

#endif /* _METAG_MACH_ARCH_H_ */

#ifndef _ASM_METAG_SETUP_H

#define _ASM_METAG_SETUP_H

#include <uapi/asm/setup.h>

void per_cpu_trap_init(unsigned long);

extern void __init dump_machine_table(void);

#endif /* _ASM_METAG_SETUP_H */

	! Copyright 2005,2006,2007,2009 Imagination Technologies

#include <linux/init.h>

#include <generated/asm-offsets.h>

#undef __exit

	__HEAD

	! Setup the stack and get going into _metag_start_kernel

	.global	__start

	.type   __start,function

__start:

	! D1Ar1 contains pTBI (ISTAT)

	! D0Ar2 contains pTBI

	! D1Ar3 contains __pTBISegs

	! D0Ar4 contains kernel arglist pointer

	MOVT    D0Re0,#HI(___pTBIs)

	ADD     D0Re0,D0Re0,#LO(___pTBIs)

	SETL    [D0Re0],D0Ar2,D1Ar1

	MOVT    D0Re0,#HI(___pTBISegs)

	ADD     D0Re0,D0Re0,#LO(___pTBISegs)

	SETD    [D0Re0],D1Ar3

	MOV	A0FrP,#0

	MOV	D0Re0,#0

	MOV	D1Re0,#0

	MOV	D1Ar3,#0

	MOV	D1Ar1,D0Ar4			!Store kernel boot params

	MOV	D1Ar5,#0

	MOV	D0Ar6,#0

#ifdef CONFIG_METAG_DSP

	MOV	D0.8,#0

#endif

	MOVT    A0StP,#HI(_init_thread_union)

	ADD	A0StP,A0StP,#LO(_init_thread_union)

	ADD     A0StP,A0StP,#THREAD_INFO_SIZE

	MOVT	D1RtP,#HI(_metag_start_kernel)

	CALL	D1RtP,#LO(_metag_start_kernel)

	.size	__start,.-__start

	!! Needed by TBX

	.global	__exit

	.type   __exit,function

__exit:

	XOR     TXENABLE,D0Re0,D0Re0

	.size	__exit,.-__exit

/*

 *  arch/metag/kernel/machines.c

 *

 *  Copyright (C) 2012 Imagination Technologies Ltd.

 *

 *  Generic Meta Boards.

 */

#include <linux/init.h>

#include <asm/irq.h>

#include <asm/mach/arch.h>

static const char *meta_boards_compat[] __initdata = {

	"img,meta",

	NULL,

};

MACHINE_START(META, "Generic Meta")

	.dt_compat	= meta_boards_compat,

MACHINE_END