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authorRichard Qin <richard.qin.x@gmail.com>2026-07-10 11:31:46 +0800
committerRichard Qin <richard.qin.x@gmail.com>2026-07-10 11:31:46 +0800
commite90b72ec3082588b296956730bd2930cf8d5d671 (patch)
tree36ff6916af9b4176ea5a9662219d11e721f0b691 /na/scripts/dtc/libfdt/fdt.c
parent1767d390fbf3d0c65389de46caf0b6d43ef3b6ad (diff)
downloadlume-e90b72ec3082588b296956730bd2930cf8d5d671.tar.gz
lume-e90b72ec3082588b296956730bd2930cf8d5d671.tar.xz
refactor: promote new architecture to repository root
Archive the deprecated implementation under lume-legacy, make the new kernel the default root-level build, and update repository entry points without changing kernel behavior.
Diffstat (limited to 'na/scripts/dtc/libfdt/fdt.c')
-rw-r--r--na/scripts/dtc/libfdt/fdt.c347
1 files changed, 0 insertions, 347 deletions
diff --git a/na/scripts/dtc/libfdt/fdt.c b/na/scripts/dtc/libfdt/fdt.c
deleted file mode 100644
index 56d4dcb..0000000
--- a/na/scripts/dtc/libfdt/fdt.c
+++ /dev/null
@@ -1,347 +0,0 @@
-// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
-/*
- * libfdt - Flat Device Tree manipulation
- * Copyright (C) 2006 David Gibson, IBM Corporation.
- */
-#include "libfdt_env.h"
-
-#include <fdt.h>
-#include <libfdt.h>
-
-#include "libfdt_internal.h"
-
-/*
- * Minimal sanity check for a read-only tree. fdt_ro_probe_() checks
- * that the given buffer contains what appears to be a flattened
- * device tree with sane information in its header.
- */
-int32_t fdt_ro_probe_(const void *fdt)
-{
- uint32_t totalsize = fdt_totalsize(fdt);
-
- if (can_assume(VALID_DTB))
- return totalsize;
-
- /* The device tree must be at an 8-byte aligned address */
- if ((uintptr_t)fdt & 7)
- return -FDT_ERR_ALIGNMENT;
-
- if (fdt_magic(fdt) == FDT_MAGIC) {
- /* Complete tree */
- if (!can_assume(LATEST)) {
- if (fdt_version(fdt) < FDT_FIRST_SUPPORTED_VERSION)
- return -FDT_ERR_BADVERSION;
- if (fdt_last_comp_version(fdt) >
- FDT_LAST_SUPPORTED_VERSION)
- return -FDT_ERR_BADVERSION;
- }
- } else if (fdt_magic(fdt) == FDT_SW_MAGIC) {
- /* Unfinished sequential-write blob */
- if (!can_assume(VALID_INPUT) && fdt_size_dt_struct(fdt) == 0)
- return -FDT_ERR_BADSTATE;
- } else {
- return -FDT_ERR_BADMAGIC;
- }
-
- if (totalsize < INT32_MAX)
- return totalsize;
- else
- return -FDT_ERR_TRUNCATED;
-}
-
-static int check_off_(uint32_t hdrsize, uint32_t totalsize, uint32_t off)
-{
- return (off >= hdrsize) && (off <= totalsize);
-}
-
-static int check_block_(uint32_t hdrsize, uint32_t totalsize,
- uint32_t base, uint32_t size)
-{
- if (!check_off_(hdrsize, totalsize, base))
- return 0; /* block start out of bounds */
- if ((base + size) < base)
- return 0; /* overflow */
- if (!check_off_(hdrsize, totalsize, base + size))
- return 0; /* block end out of bounds */
- return 1;
-}
-
-size_t fdt_header_size_(uint32_t version)
-{
- if (version <= 1)
- return FDT_V1_SIZE;
- else if (version <= 2)
- return FDT_V2_SIZE;
- else if (version <= 3)
- return FDT_V3_SIZE;
- else if (version <= 16)
- return FDT_V16_SIZE;
- else
- return FDT_V17_SIZE;
-}
-
-size_t fdt_header_size(const void *fdt)
-{
- return can_assume(LATEST) ? FDT_V17_SIZE :
- fdt_header_size_(fdt_version(fdt));
-}
-
-int fdt_check_header(const void *fdt)
-{
- size_t hdrsize;
-
- /* The device tree must be at an 8-byte aligned address */
- if ((uintptr_t)fdt & 7)
- return -FDT_ERR_ALIGNMENT;
-
- if (fdt_magic(fdt) != FDT_MAGIC)
- return -FDT_ERR_BADMAGIC;
- if (!can_assume(LATEST)) {
- if ((fdt_version(fdt) < FDT_FIRST_SUPPORTED_VERSION)
- || (fdt_last_comp_version(fdt) >
- FDT_LAST_SUPPORTED_VERSION))
- return -FDT_ERR_BADVERSION;
- if (fdt_version(fdt) < fdt_last_comp_version(fdt))
- return -FDT_ERR_BADVERSION;
- }
- hdrsize = fdt_header_size(fdt);
- if (!can_assume(VALID_DTB)) {
- if ((fdt_totalsize(fdt) < hdrsize)
- || (fdt_totalsize(fdt) > INT_MAX))
- return -FDT_ERR_TRUNCATED;
-
- /* memrsv block must be 8 byte aligned */
- if (fdt_off_mem_rsvmap(fdt) % sizeof(uint64_t))
- return -FDT_ERR_ALIGNMENT;
-
- /* Structure block must be 4 byte aligned */
- if (fdt_off_dt_struct(fdt) % FDT_TAGSIZE)
- return -FDT_ERR_ALIGNMENT;
-
- /* Bounds check memrsv block */
- if (!check_off_(hdrsize, fdt_totalsize(fdt),
- fdt_off_mem_rsvmap(fdt)))
- return -FDT_ERR_TRUNCATED;
-
- /* Bounds check structure block */
- if (!can_assume(LATEST) && fdt_version(fdt) < 17) {
- if (!check_off_(hdrsize, fdt_totalsize(fdt),
- fdt_off_dt_struct(fdt)))
- return -FDT_ERR_TRUNCATED;
- } else {
- if (!check_block_(hdrsize, fdt_totalsize(fdt),
- fdt_off_dt_struct(fdt),
- fdt_size_dt_struct(fdt)))
- return -FDT_ERR_TRUNCATED;
- }
-
- /* Bounds check strings block */
- if (!check_block_(hdrsize, fdt_totalsize(fdt),
- fdt_off_dt_strings(fdt),
- fdt_size_dt_strings(fdt)))
- return -FDT_ERR_TRUNCATED;
- }
-
- return 0;
-}
-
-const void *fdt_offset_ptr(const void *fdt, int offset, unsigned int len)
-{
- unsigned int uoffset = offset;
- unsigned int absoffset = offset + fdt_off_dt_struct(fdt);
-
- if (offset < 0)
- return NULL;
-
- if (!can_assume(VALID_INPUT))
- if ((absoffset < uoffset)
- || ((absoffset + len) < absoffset)
- || (absoffset + len) > fdt_totalsize(fdt))
- return NULL;
-
- if (can_assume(LATEST) || fdt_version(fdt) >= 0x11)
- if (((uoffset + len) < uoffset)
- || ((offset + len) > fdt_size_dt_struct(fdt)))
- return NULL;
-
- return fdt_offset_ptr_(fdt, offset);
-}
-
-uint32_t fdt_next_tag(const void *fdt, int startoffset, int *nextoffset)
-{
- const fdt32_t *tagp, *lenp;
- uint32_t tag, len, sum;
- int offset = startoffset;
- const char *p;
-
- *nextoffset = -FDT_ERR_TRUNCATED;
- tagp = fdt_offset_ptr(fdt, offset, FDT_TAGSIZE);
- if (!can_assume(VALID_DTB) && !tagp)
- return FDT_END; /* premature end */
- tag = fdt32_to_cpu(*tagp);
- offset += FDT_TAGSIZE;
-
- *nextoffset = -FDT_ERR_BADSTRUCTURE;
- switch (tag) {
- case FDT_BEGIN_NODE:
- /* skip name */
- do {
- p = fdt_offset_ptr(fdt, offset++, 1);
- } while (p && (*p != '\0'));
- if (!can_assume(VALID_DTB) && !p)
- return FDT_END; /* premature end */
- break;
-
- case FDT_PROP:
- lenp = fdt_offset_ptr(fdt, offset, sizeof(*lenp));
- if (!can_assume(VALID_DTB) && !lenp)
- return FDT_END; /* premature end */
-
- len = fdt32_to_cpu(*lenp);
- sum = len + offset;
- if (!can_assume(VALID_DTB) &&
- (INT_MAX <= sum || sum < (uint32_t) offset))
- return FDT_END; /* premature end */
-
- /* skip-name offset, length and value */
- offset += sizeof(struct fdt_property) - FDT_TAGSIZE + len;
-
- if (!can_assume(LATEST) &&
- fdt_version(fdt) < 0x10 && len >= 8 &&
- ((offset - len) % 8) != 0)
- offset += 4;
- break;
-
- case FDT_END:
- case FDT_END_NODE:
- case FDT_NOP:
- break;
-
- default:
- return FDT_END;
- }
-
- if (!fdt_offset_ptr(fdt, startoffset, offset - startoffset))
- return FDT_END; /* premature end */
-
- *nextoffset = FDT_TAGALIGN(offset);
- return tag;
-}
-
-int fdt_check_node_offset_(const void *fdt, int offset)
-{
- if (!can_assume(VALID_INPUT)
- && ((offset < 0) || (offset % FDT_TAGSIZE)))
- return -FDT_ERR_BADOFFSET;
-
- if (fdt_next_tag(fdt, offset, &offset) != FDT_BEGIN_NODE)
- return -FDT_ERR_BADOFFSET;
-
- return offset;
-}
-
-int fdt_check_prop_offset_(const void *fdt, int offset)
-{
- if (!can_assume(VALID_INPUT)
- && ((offset < 0) || (offset % FDT_TAGSIZE)))
- return -FDT_ERR_BADOFFSET;
-
- if (fdt_next_tag(fdt, offset, &offset) != FDT_PROP)
- return -FDT_ERR_BADOFFSET;
-
- return offset;
-}
-
-int fdt_next_node(const void *fdt, int offset, int *depth)
-{
- int nextoffset = 0;
- uint32_t tag;
-
- if (offset >= 0)
- if ((nextoffset = fdt_check_node_offset_(fdt, offset)) < 0)
- return nextoffset;
-
- do {
- offset = nextoffset;
- tag = fdt_next_tag(fdt, offset, &nextoffset);
-
- switch (tag) {
- case FDT_PROP:
- case FDT_NOP:
- break;
-
- case FDT_BEGIN_NODE:
- if (depth)
- (*depth)++;
- break;
-
- case FDT_END_NODE:
- if (depth && ((--(*depth)) < 0))
- return nextoffset;
- break;
-
- case FDT_END:
- if ((nextoffset >= 0)
- || ((nextoffset == -FDT_ERR_TRUNCATED) && !depth))
- return -FDT_ERR_NOTFOUND;
- else
- return nextoffset;
- }
- } while (tag != FDT_BEGIN_NODE);
-
- return offset;
-}
-
-int fdt_first_subnode(const void *fdt, int offset)
-{
- int depth = 0;
-
- offset = fdt_next_node(fdt, offset, &depth);
- if (offset < 0 || depth != 1)
- return -FDT_ERR_NOTFOUND;
-
- return offset;
-}
-
-int fdt_next_subnode(const void *fdt, int offset)
-{
- int depth = 1;
-
- /*
- * With respect to the parent, the depth of the next subnode will be
- * the same as the last.
- */
- do {
- offset = fdt_next_node(fdt, offset, &depth);
- if (offset < 0 || depth < 1)
- return -FDT_ERR_NOTFOUND;
- } while (depth > 1);
-
- return offset;
-}
-
-const char *fdt_find_string_len_(const char *strtab, int tabsize, const char *s,
- int slen)
-{
- const char *last = strtab + tabsize - (slen + 1);
- const char *p;
-
- for (p = strtab; p <= last; p++)
- if (memcmp(p, s, slen) == 0 && p[slen] == '\0')
- return p;
- return NULL;
-}
-
-int fdt_move(const void *fdt, void *buf, int bufsize)
-{
- if (!can_assume(VALID_INPUT) && bufsize < 0)
- return -FDT_ERR_NOSPACE;
-
- FDT_RO_PROBE(fdt);
-
- if (fdt_totalsize(fdt) > (unsigned int)bufsize)
- return -FDT_ERR_NOSPACE;
-
- memmove(buf, fdt, fdt_totalsize(fdt));
- return 0;
-}