diff options
Diffstat (limited to 'src/lib/device_tree.c')
| -rw-r--r-- | src/lib/device_tree.c | 66 |
1 files changed, 35 insertions, 31 deletions
diff --git a/src/lib/device_tree.c b/src/lib/device_tree.c index 89387ffdbf..79561a69b8 100644 --- a/src/lib/device_tree.c +++ b/src/lib/device_tree.c @@ -28,7 +28,8 @@ * Functions for picking apart flattened trees. */ -int fdt_next_property(void *blob, uint32_t offset, struct fdt_property *prop) +int fdt_next_property(const void *blob, uint32_t offset, + struct fdt_property *prop) { struct fdt_header *header = (struct fdt_header *)blob; uint32_t *ptr = (uint32_t *)(((uint8_t *)blob) + offset); @@ -52,7 +53,7 @@ int fdt_next_property(void *blob, uint32_t offset, struct fdt_property *prop) return index * sizeof(uint32_t); } -int fdt_node_name(void *blob, uint32_t offset, const char **name) +int fdt_node_name(const void *blob, uint32_t offset, const char **name) { uint8_t *ptr = ((uint8_t *)blob) + offset; if (be32toh(*(uint32_t *)ptr) != FDT_TOKEN_BEGIN_NODE) @@ -76,7 +77,7 @@ static void print_indent(int depth) printk(BIOS_DEBUG, " "); } -static void print_property(struct fdt_property *prop, int depth) +static void print_property(const struct fdt_property *prop, int depth) { print_indent(depth); printk(BIOS_DEBUG, "prop \"%s\" (%d bytes).\n", prop->name, prop->size); @@ -89,7 +90,7 @@ static void print_property(struct fdt_property *prop, int depth) printk(BIOS_DEBUG, "\n"); } -static int print_flat_node(void *blob, uint32_t start_offset, int depth) +static int print_flat_node(const void *blob, uint32_t start_offset, int depth) { int offset = start_offset; const char *name; @@ -116,7 +117,7 @@ static int print_flat_node(void *blob, uint32_t start_offset, int depth) return offset - start_offset + sizeof(uint32_t); } -void fdt_print_node(void *blob, uint32_t offset) +void fdt_print_node(const void *blob, uint32_t offset) { print_flat_node(blob, offset, 0); } @@ -127,7 +128,7 @@ void fdt_print_node(void *blob, uint32_t offset) * A utility function to skip past nodes in flattened trees. */ -int fdt_skip_node(void *blob, uint32_t start_offset) +int fdt_skip_node(const void *blob, uint32_t start_offset) { int offset = start_offset; int size; @@ -171,7 +172,7 @@ static struct device_tree_property *alloc_prop(void) return buf; } -static int fdt_unflatten_node(void *blob, uint32_t start_offset, +static int fdt_unflatten_node(const void *blob, uint32_t start_offset, struct device_tree_node **new_node) { struct list_node *last; @@ -216,12 +217,12 @@ static int fdt_unflatten_node(void *blob, uint32_t start_offset, return offset - start_offset + sizeof(uint32_t); } -static int fdt_unflatten_map_entry(void *blob, uint32_t offset, +static int fdt_unflatten_map_entry(const void *blob, uint32_t offset, struct device_tree_reserve_map_entry **new) { - uint64_t *ptr = (uint64_t *)(((uint8_t *)blob) + offset); - uint64_t start = be64toh(ptr[0]); - uint64_t size = be64toh(ptr[1]); + const uint64_t *ptr = (const uint64_t *)(((uint8_t *)blob) + offset); + const uint64_t start = be64toh(ptr[0]); + const uint64_t size = be64toh(ptr[1]); if (!size) return 0; @@ -237,10 +238,10 @@ static int fdt_unflatten_map_entry(void *blob, uint32_t offset, return sizeof(uint64_t) * 2; } -struct device_tree *fdt_unflatten(void *blob) +struct device_tree *fdt_unflatten(const void *blob) { struct device_tree *tree = malloc(sizeof(*tree)); - struct fdt_header *header = (struct fdt_header *)blob; + const struct fdt_header *header = (const struct fdt_header *)blob; if (!tree) return NULL; memset(tree, 0, sizeof(*tree)); @@ -315,7 +316,7 @@ static void dt_flat_node_size(struct device_tree_node *node, *struct_size += sizeof(uint32_t); } -uint32_t dt_flat_size(struct device_tree *tree) +uint32_t dt_flat_size(const struct device_tree *tree) { uint32_t size = tree->header_size; struct device_tree_reserve_map_entry *entry; @@ -377,8 +378,9 @@ static void dt_flatten_prop(struct device_tree_property *prop, *strings_start = dstrings; } -static void dt_flatten_node(struct device_tree_node *node, void **struct_start, - void *strings_base, void **strings_start) +static void dt_flatten_node(const struct device_tree_node *node, + void **struct_start, void *strings_base, + void **strings_start) { uint8_t *dstruct = (uint8_t *)*struct_start; uint8_t *dstrings = (uint8_t *)*strings_start; @@ -406,7 +408,7 @@ static void dt_flatten_node(struct device_tree_node *node, void **struct_start, *strings_start = dstrings; } -void dt_flatten(struct device_tree *tree, void *start_dest) +void dt_flatten(const struct device_tree *tree, void *start_dest) { uint8_t *dest = (uint8_t *)start_dest; @@ -449,7 +451,7 @@ void dt_flatten(struct device_tree *tree, void *start_dest) * Functions for printing a non-flattened device tree. */ -static void print_node(struct device_tree_node *node, int depth) +static void print_node(const struct device_tree_node *node, int depth) { print_indent(depth); printk(BIOS_DEBUG, "name = %s\n", node->name); @@ -463,7 +465,7 @@ static void print_node(struct device_tree_node *node, int depth) print_node(child, depth + 1); } -void dt_print_node(struct device_tree_node *node) +void dt_print_node(const struct device_tree_node *node) { print_node(node, 0); } @@ -481,7 +483,8 @@ void dt_print_node(struct device_tree_node *node) * @param addrcp Pointer to store #address-cells in, skipped if NULL. * @param sizecp Pointer to store #size-cells in, skipped if NULL. */ -void dt_read_cell_props(struct device_tree_node *node, u32 *addrcp, u32 *sizecp) +void dt_read_cell_props(const struct device_tree_node *node, u32 *addrcp, + u32 *sizecp) { struct device_tree_property *prop; list_for_each(prop, node->properties, list_node) { @@ -706,7 +709,7 @@ struct device_tree_node *dt_find_prop_value(struct device_tree_node *parent, list_for_each(prop, parent->properties, list_node) { if (!strcmp(name, prop->prop.name)) { size_t bytes = prop->prop.size; - void *prop_data = prop->prop.data; + const void *prop_data = prop->prop.data; if (size != bytes) break; if (!memcmp(data, prop_data, size)) @@ -731,16 +734,16 @@ struct device_tree_node *dt_find_prop_value(struct device_tree_node *parent, * @param node Pointer to node containing the phandle * @return Zero on error, the phandle on success */ -uint32_t dt_get_phandle(struct device_tree_node *node) +uint32_t dt_get_phandle(const struct device_tree_node *node) { - uint32_t *phandle; + const uint32_t *phandle; size_t len; - dt_find_bin_prop(node, "phandle", (void **)&phandle, &len); + dt_find_bin_prop(node, "phandle", (const void **)&phandle, &len); if (phandle != NULL && len == sizeof(*phandle)) return be32_to_cpu(*phandle); - dt_find_bin_prop(node, "linux,phandle", (void **)&phandle, &len); + dt_find_bin_prop(node, "linux,phandle", (const void **)&phandle, &len); if (phandle != NULL && len == sizeof(*phandle)) return be32_to_cpu(*phandle); @@ -789,7 +792,7 @@ void dt_delete_prop(struct device_tree_node *node, const char *name) * @param size The size of data in bytes. */ void dt_add_bin_prop(struct device_tree_node *node, const char *name, - void *data, size_t size) + const void *data, size_t size) { struct device_tree_property *prop; @@ -817,9 +820,10 @@ void dt_add_bin_prop(struct device_tree_node *node, const char *name, * @param name The name of the property. * @return The found string, or NULL. */ -const char *dt_find_string_prop(struct device_tree_node *node, const char *name) +const char *dt_find_string_prop(const struct device_tree_node *node, + const char *name) { - void *content; + const void *content; size_t size; dt_find_bin_prop(node, name, &content, &size); @@ -835,8 +839,8 @@ const char *dt_find_string_prop(struct device_tree_node *node, const char *name) * @param data Pointer to return raw data blob in the property. * @param size Pointer to return the size of data in bytes. */ -void dt_find_bin_prop(struct device_tree_node *node, const char *name, - void **data, size_t *size) +void dt_find_bin_prop(const struct device_tree_node *node, const char *name, + const void **data, size_t *size) { struct device_tree_property *prop; @@ -860,7 +864,7 @@ void dt_find_bin_prop(struct device_tree_node *node, const char *name, * @param str The zero-terminated string to be stored in the property. */ void dt_add_string_prop(struct device_tree_node *node, const char *name, - char *str) + const char *str) { dt_add_bin_prop(node, name, str, strlen(str) + 1); } |