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Diffstat (limited to 'include/grub/fdt.h')
| -rw-r--r-- | include/grub/fdt.h | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/include/grub/fdt.h b/include/grub/fdt.h new file mode 100644 index 0000000..e609c7e --- /dev/null +++ b/include/grub/fdt.h @@ -0,0 +1,147 @@ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2013 Free Software Foundation, Inc. + * + * GRUB 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 3 of the License, or + * (at your option) any later version. + * + * GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef GRUB_FDT_HEADER +#define GRUB_FDT_HEADER 1 + +#include <grub/types.h> +#include <grub/symbol.h> + +/* Space required when preparing the /chosen node after boot has been called. */ +#define GRUB_EFI_LINUX_FDT_EXTRA_SPACE 0x400 + +#define FDT_MAGIC 0xD00DFEED + +typedef struct { + grub_uint32_t magic; + grub_uint32_t totalsize; + grub_uint32_t off_dt_struct; + grub_uint32_t off_dt_strings; + grub_uint32_t off_mem_rsvmap; + grub_uint32_t version; + grub_uint32_t last_comp_version; + grub_uint32_t boot_cpuid_phys; + grub_uint32_t size_dt_strings; + grub_uint32_t size_dt_struct; +} grub_fdt_header_t; + +struct grub_fdt_empty_tree { + grub_fdt_header_t header; + grub_uint64_t empty_rsvmap[2]; + struct { + grub_uint32_t node_start; + grub_uint8_t name[1]; + grub_uint32_t node_end; + grub_uint32_t tree_end; + } empty_node; +}; + +#define GRUB_FDT_EMPTY_TREE_SZ sizeof (struct grub_fdt_empty_tree) + +/* Size needed by a property entry: 1 token (FDT_PROPERTY), plus len and nameoff + fields, plus the property value, plus padding if needed. */ +#define grub_fdt_prop_entry_size(prop_len) \ + (3 * sizeof(grub_uint32_t) + ALIGN_UP(prop_len, sizeof(grub_uint32_t))) + +#define grub_fdt_get_header(fdt, field) \ + grub_be_to_cpu32(((const grub_fdt_header_t *)(fdt))->field) +#define grub_fdt_set_header(fdt, field, value) \ + ((grub_fdt_header_t *)(fdt))->field = grub_cpu_to_be32(value) + +#define grub_fdt_get_magic(fdt) \ + grub_fdt_get_header(fdt, magic) +#define grub_fdt_set_magic(fdt, value) \ + grub_fdt_set_header(fdt, magic, value) +#define grub_fdt_get_totalsize(fdt) \ + grub_fdt_get_header(fdt, totalsize) +#define grub_fdt_set_totalsize(fdt, value) \ + grub_fdt_set_header(fdt, totalsize, value) +#define grub_fdt_get_off_dt_struct(fdt) \ + grub_fdt_get_header(fdt, off_dt_struct) +#define grub_fdt_set_off_dt_struct(fdt, value) \ + grub_fdt_set_header(fdt, off_dt_struct, value) +#define grub_fdt_get_off_dt_strings(fdt) \ + grub_fdt_get_header(fdt, off_dt_strings) +#define grub_fdt_set_off_dt_strings(fdt, value) \ + grub_fdt_set_header(fdt, off_dt_strings, value) +#define grub_fdt_get_off_mem_rsvmap(fdt) \ + grub_fdt_get_header(fdt, off_mem_rsvmap) +#define grub_fdt_set_off_mem_rsvmap(fdt, value) \ + grub_fdt_set_header(fdt, off_mem_rsvmap, value) +#define grub_fdt_get_version(fdt) \ + grub_fdt_get_header(fdt, version) +#define grub_fdt_set_version(fdt, value) \ + grub_fdt_set_header(fdt, version, value) +#define grub_fdt_get_last_comp_version(fdt) \ + grub_fdt_get_header(fdt, last_comp_version) +#define grub_fdt_set_last_comp_version(fdt, value) \ + grub_fdt_set_header(fdt, last_comp_version, value) +#define grub_fdt_get_boot_cpuid_phys(fdt) \ + grub_fdt_get_header(fdt, boot_cpuid_phys) +#define grub_fdt_set_boot_cpuid_phys(fdt, value) \ + grub_fdt_set_header(fdt, boot_cpuid_phys, value) +#define grub_fdt_get_size_dt_strings(fdt) \ + grub_fdt_get_header(fdt, size_dt_strings) +#define grub_fdt_set_size_dt_strings(fdt, value) \ + grub_fdt_set_header(fdt, size_dt_strings, value) +#define grub_fdt_get_size_dt_struct(fdt) \ + grub_fdt_get_header(fdt, size_dt_struct) +#define grub_fdt_set_size_dt_struct(fdt, value) \ + grub_fdt_set_header(fdt, size_dt_struct, value) + +int EXPORT_FUNC(grub_fdt_create_empty_tree) (void *fdt, unsigned int size); +int EXPORT_FUNC(grub_fdt_check_header) (const void *fdt, unsigned int size); +int EXPORT_FUNC(grub_fdt_check_header_nosize) (const void *fdt); +int EXPORT_FUNC(grub_fdt_find_subnode) (const void *fdt, unsigned int parentoffset, + const char *name); +int EXPORT_FUNC(grub_fdt_first_node) (const void *fdt, unsigned int parentoffset); +int EXPORT_FUNC(grub_fdt_next_node) (const void *fdt, unsigned int currentoffset); +int EXPORT_FUNC(grub_fdt_add_subnode) (void *fdt, unsigned int parentoffset, + const char *name); +const char * +EXPORT_FUNC(grub_fdt_get_nodename) (const void *fdt, unsigned int nodeoffset); +const void *EXPORT_FUNC(grub_fdt_get_prop) (const void *fdt, unsigned int nodeoffset, const char *name, + grub_uint32_t *len); + +int EXPORT_FUNC(grub_fdt_set_prop) (void *fdt, unsigned int nodeoffset, const char *name, + const void *val, grub_uint32_t len); +#define grub_fdt_set_prop32(fdt, nodeoffset, name, val) \ +({ \ + grub_uint32_t _val = grub_cpu_to_be32(val); \ + grub_fdt_set_prop ((fdt), (nodeoffset), (name), &_val, 4); \ +}) + +#define grub_fdt_set_prop64(fdt, nodeoffset, name, val) \ +({ \ + grub_uint64_t _val = grub_cpu_to_be64(val); \ + grub_fdt_set_prop ((fdt), (nodeoffset), (name), &_val, 8); \ +}) + +/* Setup "reg" property for + * #address-cells = <0x2> + * #size-cells = <0x2> + */ +#define grub_fdt_set_reg64(fdt, nodeoffset, addr, size) \ +({ \ + grub_uint64_t reg_64[2]; \ + reg_64[0] = grub_cpu_to_be64(addr); \ + reg_64[1] = grub_cpu_to_be64(size); \ + grub_fdt_set_prop ((fdt), (nodeoffset), "reg", reg_64, 16); \ +}) + +#endif /* ! GRUB_FDT_HEADER */ |