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 19 void soc_early_init(void); 20 21 extern unsigned long __soc_early_init_table_start; 22 extern 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 */ 28 struct 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 57 extern unsigned long __soc_builtin_dtb_table_start; 58 extern unsigned long __soc_builtin_dtb_table_end; 59 60 void *soc_lookup_builtin_dtb(void); 61 62 #endif 63