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62 lines
1.6 KiB
62 lines
1.6 KiB
#ifndef _DT_PARSE_H_
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#define _DT_PARSE_H_
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#include "util/types.h"
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#define FDT_MAGIC 0xd00dfeed
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#define FDT_VERSION 17
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struct fdt_header {
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uint32 magic;
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uint32 totalsize;
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uint32 off_dt_struct;
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uint32 off_dt_strings;
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uint32 off_mem_rsvmap;
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uint32 version;
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uint32 last_comp_version; /* <= 17 */
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uint32 boot_cpuid_phys;
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uint32 size_dt_strings;
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uint32 size_dt_struct;
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};
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#define FDT_BEGIN_NODE 1
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#define FDT_END_NODE 2
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#define FDT_PROP 3
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#define FDT_NOP 4
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#define FDT_END 9
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struct fdt_scan_node {
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const struct fdt_scan_node *parent;
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const char *name;
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int address_cells;
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int size_cells;
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};
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struct fdt_scan_prop {
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const struct fdt_scan_node *node;
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const char *name;
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uint32 *value;
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int len; // in bytes of value
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};
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struct fdt_cb {
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void (*open)(const struct fdt_scan_node *node, void *extra);
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void (*prop)(const struct fdt_scan_prop *prop, void *extra);
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void (*done)(const struct fdt_scan_node *node,
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void *extra); // last property was seen
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int (*close)(const struct fdt_scan_node *node,
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void *extra); // -1 => delete the node + children
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void *extra;
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};
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// Scan the contents of FDT
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void fdt_scan(uint64 fdt, const struct fdt_cb *cb);
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uint32 fdt_size(uint64 fdt);
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// Extract fields
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const uint32 *fdt_get_address(const struct fdt_scan_node *node, const uint32 *base, uint64 *value);
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const uint32 *fdt_get_size(const struct fdt_scan_node *node, const uint32 *base, uint64 *value);
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int fdt_string_list_index(const struct fdt_scan_prop *prop,
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const char *str); // -1 if not found
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#endif
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