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/*
* Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com)
*
* based on METAG mach/arch.h (which in turn was based on ARM)
*
* 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 _ASM_ARC_MACH_DESC_H_
#define _ASM_ARC_MACH_DESC_H_
/**
* struct machine_desc - Board specific callbacks, called from ARC common code
* Provided by each ARC board using MACHINE_START()/MACHINE_END(), so
* a multi-platform kernel builds with array of such descriptors.
* We extend the early DT scan to also match the DT's "compatible" string
* against the @dt_compat of all such descriptors, and one with highest
* "DT score" is selected as global @machine_desc.
*
* @name: Board/SoC name
* @dt_compat: Array of device tree 'compatible' strings
* (XXX: although only 1st entry is looked at)
* @init_early: Very early callback [called from setup_arch()]
* @init_irq: setup external IRQ controllers [called from init_IRQ()]
* @init_smp: for each CPU (e.g. setup IPI)
* [(M):init_IRQ(), (o):start_kernel_secondary()]
* @init_time: platform specific clocksource/clockevent registration
* [called from time_init()]
* @init_machine: arch initcall level callback (e.g. populate static
* platform devices or parse Devicetree)
* @init_late: Late initcall level callback
*
*/
struct machine_desc {
const char *name;
const char **dt_compat;
void (*init_early)(void);
void (*init_irq)(void);
#ifdef CONFIG_SMP
void (*init_smp)(unsigned int);
#endif
void (*init_time)(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 \
};
extern struct machine_desc *setup_machine_fdt(void *dt);
extern void __init copy_devtree(void);
#endif
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