diff options
| -rw-r--r-- | cpukit/dtc/libfdt/fdt_ro.c | 18 | ||||
| -rw-r--r-- | cpukit/include/libfdt.h | 25 |
2 files changed, 33 insertions, 10 deletions
diff --git a/cpukit/dtc/libfdt/fdt_ro.c b/cpukit/dtc/libfdt/fdt_ro.c index 4ba7c93313..eafc142828 100644 --- a/cpukit/dtc/libfdt/fdt_ro.c +++ b/cpukit/dtc/libfdt/fdt_ro.c @@ -191,8 +191,8 @@ int fdt_get_mem_rsv(const void *fdt, int n, uint64_t *address, uint64_t *size) if (!re) return -FDT_ERR_BADOFFSET; - *address = fdt64_to_cpu(re->address); - *size = fdt64_to_cpu(re->size); + *address = fdt64_ld(&re->address); + *size = fdt64_ld(&re->size); return 0; } @@ -202,7 +202,7 @@ int fdt_num_mem_rsv(const void *fdt) const struct fdt_reserve_entry *re; for (i = 0; (re = fdt_mem_rsv(fdt, i)) != NULL; i++) { - if (fdt64_to_cpu(re->size) == 0) + if (fdt64_ld(&re->size) == 0) return i; } return -FDT_ERR_TRUNCATED; @@ -379,7 +379,7 @@ static const struct fdt_property *fdt_get_property_by_offset_(const void *fdt, prop = fdt_offset_ptr_(fdt, offset); if (lenp) - *lenp = fdt32_to_cpu(prop->len); + *lenp = fdt32_ld(&prop->len); return prop; } @@ -416,7 +416,7 @@ static const struct fdt_property *fdt_get_property_namelen_(const void *fdt, offset = -FDT_ERR_INTERNAL; break; } - if (fdt_string_eq_(fdt, fdt32_to_cpu(prop->nameoff), + if (fdt_string_eq_(fdt, fdt32_ld(&prop->nameoff), name, namelen)) { if (poffset) *poffset = offset; @@ -469,7 +469,7 @@ const void *fdt_getprop_namelen(const void *fdt, int nodeoffset, /* Handle realignment */ if (fdt_version(fdt) < 0x10 && (poffset + sizeof(*prop)) % 8 && - fdt32_to_cpu(prop->len) >= 8) + fdt32_ld(&prop->len) >= 8) return prop->data + 4; return prop->data; } @@ -485,7 +485,7 @@ const void *fdt_getprop_by_offset(const void *fdt, int offset, if (namep) { const char *name; int namelen; - name = fdt_get_string(fdt, fdt32_to_cpu(prop->nameoff), + name = fdt_get_string(fdt, fdt32_ld(&prop->nameoff), &namelen); if (!name) { if (lenp) @@ -497,7 +497,7 @@ const void *fdt_getprop_by_offset(const void *fdt, int offset, /* Handle realignment */ if (fdt_version(fdt) < 0x10 && (offset + sizeof(*prop)) % 8 && - fdt32_to_cpu(prop->len) >= 8) + fdt32_ld(&prop->len) >= 8) return prop->data + 4; return prop->data; } @@ -522,7 +522,7 @@ uint32_t fdt_get_phandle(const void *fdt, int nodeoffset) return 0; } - return fdt32_to_cpu(*php); + return fdt32_ld(php); } const char *fdt_get_alias_namelen(const void *fdt, diff --git a/cpukit/include/libfdt.h b/cpukit/include/libfdt.h index c99d28fea5..38ec313094 100644 --- a/cpukit/include/libfdt.h +++ b/cpukit/include/libfdt.h @@ -154,6 +154,29 @@ static inline void *fdt_offset_ptr_w(void *fdt, int offset, int checklen) uint32_t fdt_next_tag(const void *fdt, int offset, int *nextoffset); +/* + * Alignment helpers: + * These helpers access words from a device tree blob. They're + * built to work even with unaligned pointers on platforms (ike + * ARM) that don't like unaligned loads and stores + */ + +static inline uint32_t fdt32_ld(const fdt32_t *p) +{ + fdt32_t v; + + memcpy(&v, p, sizeof(v)); + return fdt32_to_cpu(v); +} + +static inline uint64_t fdt64_ld(const fdt64_t *p) +{ + fdt64_t v; + + memcpy(&v, p, sizeof(v)); + return fdt64_to_cpu(v); +} + /**********************************************************************/ /* Traversal functions */ /**********************************************************************/ @@ -214,7 +237,7 @@ int fdt_next_subnode(const void *fdt, int offset); /* General functions */ /**********************************************************************/ #define fdt_get_header(fdt, field) \ - (fdt32_to_cpu(((const struct fdt_header *)(fdt))->field)) + (fdt32_ld(&((const struct fdt_header *)(fdt))->field)) #define fdt_magic(fdt) (fdt_get_header(fdt, magic)) #define fdt_totalsize(fdt) (fdt_get_header(fdt, totalsize)) #define fdt_off_dt_struct(fdt) (fdt_get_header(fdt, off_dt_struct)) |