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Added flattened device tree (FDT) support. Setting required FDT field…
…s per ePAPR 1.1.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,138 @@ | ||
| /* fdt.h | ||
| * | ||
| * Functions to help with flattened device tree (DTB) parsing | ||
| * | ||
| * | ||
| * Copyright (C) 2023 wolfSSL Inc. | ||
| * | ||
| * This file is part of wolfBoot. | ||
| * | ||
| * wolfBoot is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation; either version 2 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * wolfBoot is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program; if not, write to the Free Software | ||
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA | ||
| */ | ||
|
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| /* Based on work from "libfdt" by David Gibson */ | ||
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| #ifndef FDT_H | ||
| #define FDT_H | ||
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| #ifdef __cplusplus | ||
| extern "C" { | ||
| #endif | ||
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| #include <stdint.h> | ||
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| #ifdef BIG_ENDIAN_ORDER | ||
| #define FDT_MAGIC 0xD00DFEEDUL | ||
| #else | ||
| #define FDT_MAGIC 0xEDFE0DD0UL | ||
| #endif | ||
| #define FDT_SW_MAGIC (~FDT_MAGIC) | ||
|
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| struct fdt_header { | ||
| uint32_t magic; | ||
| uint32_t totalsize; | ||
| uint32_t off_dt_struct; | ||
| uint32_t off_dt_strings; | ||
| uint32_t off_mem_rsvmap; | ||
| uint32_t version; | ||
| uint32_t last_comp_version; | ||
| uint32_t boot_cpuid_phys; | ||
| uint32_t size_dt_strings; | ||
| uint32_t size_dt_struct; | ||
| }; | ||
|
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| struct fdt_reserve_entry { | ||
| uint64_t address; | ||
| uint64_t size; | ||
| }; | ||
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| struct fdt_prop { | ||
| uint32_t len; | ||
| uint32_t nameoff; | ||
| }; | ||
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| struct fdt_node_header { | ||
| uint32_t tag; | ||
| char name[0]; | ||
| }; | ||
|
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| struct fdt_property { | ||
| uint32_t tag; | ||
| uint32_t len; | ||
| uint32_t nameoff; | ||
| char data[0]; | ||
| }; | ||
|
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| #define FDT_TAGSIZE sizeof(uint32_t) | ||
| #define FDT_ALIGN(x, a) (((x) + (a) - 1) & ~((a) - 1)) | ||
| #define FDT_TAGALIGN(x) (FDT_ALIGN((x), FDT_TAGSIZE)) | ||
|
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| #define FDT_BEGIN_NODE 0x00000001UL | ||
| #define FDT_END_NODE 0x00000002UL | ||
| #define FDT_PROP 0x00000003UL | ||
| #define FDT_NOP 0x00000004UL | ||
| #define FDT_END 0x00000009UL | ||
|
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| #define FDT_ERR_NOTFOUND 1 | ||
| #define FDT_ERR_NOSPACE 3 | ||
| #define FDT_ERR_BADOFFSET 4 | ||
| #define FDT_ERR_TRUNCATED 8 | ||
| #define FDT_ERR_BADVERSION 10 | ||
| #define FDT_ERR_BADSTRUCTURE 11 | ||
| #define FDT_ERR_INTERNAL 13 | ||
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| uint32_t cpu_to_fdt32(uint32_t x); | ||
| uint64_t cpu_to_fdt64(uint64_t x); | ||
| uint32_t fdt32_to_cpu(uint32_t x); | ||
| uint64_t fdt64_to_cpu(uint64_t x); | ||
|
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| int fdt_next_node(const void *fdt, int offset, int *depth); | ||
| const void *fdt_getprop(const void *fdt, int nodeoffset, const char *name, int *lenp); | ||
| int fdt_setprop(void *fdt, int nodeoffset, const char *name, const void *val, int len); | ||
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| int fdt_fixup_str(void* fdt, int off, const char* node, const char* name, const char* str); | ||
| int fdt_fixup_val(void* fdt, int off, const char* node, const char* name, uint32_t val); | ||
| int fdt_find_devtype(void* fdt, int startoff, const char* node); | ||
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| #define fdt_get_header(fdt, field) (fdt32_to_cpu(((const struct fdt_header *)(fdt))->field)) | ||
| #define fdt_magic(fdt) (fdt_get_header(fdt, magic)) | ||
| #define fdt_totalsize(fdt) (fdt_get_header(fdt, totalsize)) | ||
| #define fdt_off_dt_struct(fdt) (fdt_get_header(fdt, off_dt_struct)) | ||
| #define fdt_off_dt_strings(fdt) (fdt_get_header(fdt, off_dt_strings)) | ||
| #define fdt_off_mem_rsvmap(fdt) (fdt_get_header(fdt, off_mem_rsvmap)) | ||
| #define fdt_version(fdt) (fdt_get_header(fdt, version)) | ||
| #define fdt_last_comp_version(fdt) (fdt_get_header(fdt, last_comp_version)) | ||
| #define fdt_boot_cpuid_phys(fdt) (fdt_get_header(fdt, boot_cpuid_phys)) | ||
| #define fdt_size_dt_strings(fdt) (fdt_get_header(fdt, size_dt_strings)) | ||
| #define fdt_size_dt_struct(fdt) (fdt_get_header(fdt, size_dt_struct)) | ||
|
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| #define fdt_set_header(fdt, field, val) (((struct fdt_header *)fdt)->field = cpu_to_fdt32(val)) | ||
| #define fdt_set_magic(fdt, val) (fdt_set_header(fdt, magic, (val))) | ||
| #define fdt_set_totalsize(fdt, val) (fdt_set_header(fdt, totalsize, (val))) | ||
| #define fdt_set_off_dt_struct(fdt, val) (fdt_set_header(fdt, off_dt_struct, (val))) | ||
| #define fdt_set_off_dt_strings(fdt, val) (fdt_set_header(fdt, off_dt_strings, (val))) | ||
| #define fdt_set_off_mem_rsvmap(fdt, val) (fdt_set_header(fdt, off_mem_rsvmap, (val))) | ||
| #define fdt_set_version(fdt, val) (fdt_set_header(fdt, version, (val))) | ||
| #define fdt_set_last_comp_version(fdt, val) (fdt_set_header(fdt, last_comp_version, (val))) | ||
| #define fdt_set_boot_cpuid_phys(fdt, val) (fdt_set_header(fdt, boot_cpuid_phys, (val))) | ||
| #define fdt_set_size_dt_strings(fdt, val) (fdt_set_header(fdt, size_dt_strings, (val))) | ||
| #define fdt_set_size_dt_struct(fdt, val) (fdt_set_header(fdt, size_dt_struct, (val))) | ||
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| #ifdef __cplusplus | ||
| } | ||
| #endif | ||
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| #endif /* !FDT_H */ |
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