mirror of
https://github.com/torvalds/linux.git
synced 2024-12-26 12:52:30 +00:00
eab6a08c08
The flat DT (currently embedded in vmlinux) is in .init section. The unflattened/binary tree doesn't copy strings through and references them from orig flat DT - which could cause catestrohpy if of_* APIs are called post init, say from a driver which is a loadable module. Reported-by: James Hogan <james.hogan@imgtec.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
88 lines
2.6 KiB
C
88 lines
2.6 KiB
C
/*
|
|
* 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
|