Migrate to libfdt
Replace our custom FDT parser implementation with libfdt while retaining
the original API as a thin wrapper around libfdt. This minimizes the
changes to the rest of our code base and hides differences in coding
styles.
As a byproduct, this fixes an issue with unaligned memory accesses while
parsing as libfdt handles these correctly.
Bug: 150587116
Change-Id: I8d305d7094b1be04608048009d73d7c448a578a0
diff --git a/inc/hf/fdt_handler.h b/inc/hf/fdt_handler.h
index 4e18afc..8cf3a4a 100644
--- a/inc/hf/fdt_handler.h
+++ b/inc/hf/fdt_handler.h
@@ -22,19 +22,15 @@
#include "hf/mpool.h"
#include "hf/string.h"
-struct fdt_header *fdt_map(struct mm_stage1_locked stage1_locked,
- paddr_t fdt_addr, struct fdt_node *n,
- struct mpool *ppool);
-bool fdt_unmap(struct mm_stage1_locked stage1_locked, struct fdt_header *fdt,
+#define FDT_PROP_INITRD_START "linux,initrd-start"
+#define FDT_PROP_INITRD_END "linux,initrd-end"
+
+bool fdt_map(struct fdt *fdt, struct mm_stage1_locked stage1_locked,
+ paddr_t fdt_addr, struct mpool *ppool);
+bool fdt_unmap(struct fdt *fdt, struct mm_stage1_locked stage1_locked,
struct mpool *ppool);
-bool fdt_find_cpus(const struct fdt_node *root, cpu_id_t *cpu_ids,
- size_t *cpu_count);
-bool fdt_find_memory_ranges(const struct fdt_node *root,
- struct string *device_type,
+bool fdt_find_cpus(const struct fdt *fdt, cpu_id_t *cpu_ids, size_t *cpu_count);
+bool fdt_find_memory_ranges(const struct fdt *fdt, struct string *device_type,
struct mem_range *mem_ranges,
size_t *mem_ranges_count, size_t mem_range_limit);
-bool fdt_find_initrd(const struct fdt_node *root, paddr_t *begin, paddr_t *end);
-
-/** Apply an update to the FDT. */
-bool fdt_patch(struct mm_stage1_locked stage1_locked, paddr_t fdt_addr,
- struct boot_params_update *p, struct mpool *ppool);
+bool fdt_find_initrd(const struct fdt *fdt, paddr_t *begin, paddr_t *end);