LXR linux/arch/riscv/include/asm/soc.h

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 * Copyright (C) 2020 Western Digital Corporation or its affiliates.
   4 * Copyright (C) 2020 Google, Inc
   5 */
   6
   7#ifndef _ASM_RISCV_SOC_H
   8#define _ASM_RISCV_SOC_H
   9
  10#include <linux/of.h>
  11#include <linux/linkage.h>
  12#include <linux/types.h>
  13
  14#define SOC_EARLY_INIT_DECLARE(name, compat, fn)                        \
  15        static const struct of_device_id __soc_early_init__##name       \
  16                __used __section(__soc_early_init_table)                \
  17                 = { .compatible = compat, .data = fn  }
  18
  19void soc_early_init(void);
  20
  21extern unsigned long __soc_early_init_table_start;
  22extern unsigned long __soc_early_init_table_end;
  23
  24/*
  25 * Allows Linux to provide a device tree, which is necessary for SOCs that
  26 * don't provide a useful one on their own.
  27 */
  28struct soc_builtin_dtb {
  29        unsigned long vendor_id;
  30        unsigned long arch_id;
  31        unsigned long imp_id;
  32        void *(*dtb_func)(void);
  33};
  34
  35/*
  36 * The argument name must specify a valid DTS file name without the dts
  37 * extension.
  38 */
  39#define SOC_BUILTIN_DTB_DECLARE(name, vendor, arch, impl)               \
  40        extern void *__dtb_##name##_begin;                              \
  41                                                                        \
  42        static __init __used                                            \
  43        void *__soc_builtin_dtb_f__##name(void)                         \
  44        {                                                               \
  45                return (void *)&__dtb_##name##_begin;                   \
  46        }                                                               \
  47                                                                        \
  48        static const struct soc_builtin_dtb __soc_builtin_dtb__##name   \
  49                __used __section(__soc_builtin_dtb_table) =             \
  50        {                                                               \
  51                .vendor_id = vendor,                                    \
  52                .arch_id   = arch,                                      \
  53                .imp_id    = impl,                                      \
  54                .dtb_func  = __soc_builtin_dtb_f__##name,               \
  55        }
  56
  57extern unsigned long __soc_builtin_dtb_table_start;
  58extern unsigned long __soc_builtin_dtb_table_end;
  59
  60void *soc_lookup_builtin_dtb(void);
  61
  62#endif
  63