LXR linux/arch/arc/include/asm/mach

   1/*
   2 * Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com)
   3 *
   4 * based on METAG mach/arch.h (which in turn was based on ARM)
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License version 2 as
   8 * published by the Free Software Foundation.
   9 */
  10
  11#ifndef _ASM_ARC_MACH_DESC_H_
  12#define _ASM_ARC_MACH_DESC_H_
  13
  14/**
  15 * struct machine_desc - Board specific callbacks, called from ARC common code
  16 *      Provided by each ARC board using MACHINE_START()/MACHINE_END(), so
  17 *      a multi-platform kernel builds with array of such descriptors.
  18 *      We extend the early DT scan to also match the DT's "compatible" string
  19 *      against the @dt_compat of all such descriptors, and one with highest
  20 *      "DT score" is selected as global @machine_desc.
  21 *
  22 * @name:               Board/SoC name
  23 * @dt_compat:          Array of device tree 'compatible' strings
  24 *                      (XXX: although only 1st entry is looked at)
  25 * @init_early:         Very early callback [called from setup_arch()]
  26 * @init_irq:           setup external IRQ controllers [called from init_IRQ()]
  27 * @init_smp:           for each CPU (e.g. setup IPI)
  28 *                      [(M):init_IRQ(), (o):start_kernel_secondary()]
  29 * @init_time:          platform specific clocksource/clockevent registration
  30 *                      [called from time_init()]
  31 * @init_machine:       arch initcall level callback (e.g. populate static
  32 *                      platform devices or parse Devicetree)
  33 * @init_late:          Late initcall level callback
  34 *
  35 */
  36struct machine_desc {
  37        const char              *name;
  38        const char              **dt_compat;
  39
  40        void                    (*init_early)(void);
  41        void                    (*init_irq)(void);
  42#ifdef CONFIG_SMP
  43        void                    (*init_smp)(unsigned int);
  44#endif
  45        void                    (*init_time)(void);
  46        void                    (*init_machine)(void);
  47        void                    (*init_late)(void);
  48
  49};
  50
  51/*
  52 * Current machine - only accessible during boot.
  53 */
  54extern const struct machine_desc *machine_desc;
  55
  56/*
  57 * Machine type table - also only accessible during boot
  58 */
  59extern const struct machine_desc __arch_info_begin[], __arch_info_end[];
  60
  61/*
  62 * Set of macros to define architecture features.
  63 * This is built into a table by the linker.
  64 */
  65#define MACHINE_START(_type, _name)                     \
  66static const struct machine_desc __mach_desc_##_type    \
  67__used                                                  \
  68__attribute__((__section__(".arch.info.init"))) = {     \
  69        .name           = _name,
  70
  71#define MACHINE_END                             \
  72};
  73
  74extern const struct machine_desc *setup_machine_fdt(void *dt);
  75
  76#endif
  77