libfdt: Revert 6dcb8ba4 from upstream libfdt
In upstream libfdt, 6dcb8ba4 "libfdt: Add helpers for accessing
unaligned words" introduced changes to support unaligned reads for ARM
platforms and 11738cf01f15 "libfdt: Don't use memcpy to handle unaligned
reads on ARM" improved the performance of these helpers.
In practice however, this only occurs when the user has forced the
device tree to be placed in memory in a non-aligned way, which in turn
violates both our rules and the Linux Kernel rules for how things must
reside in memory to function.
This "in practice" part is important as handling these other cases adds
visible (1 second or more) delay to boot in what would be considered the
fast path of the code.
Cc: Patrice CHOTARD <patrice.chotard@st.com>
Cc: Patrick DELAUNAY <patrick.delaunay@st.com>
Link: https://www.spinics.net/lists/devicetree-compiler/msg02972.html
Signed-off-by: Tom Rini <trini@konsulko.com>
Tested-by: Patrice Chotard <patrice.chotard@st.com>
diff --git a/lib/libfdt/fdt_ro.c b/lib/libfdt/fdt_ro.c
index 560041b..be03aea 100644
--- a/lib/libfdt/fdt_ro.c
+++ b/lib/libfdt/fdt_ro.c
@@ -183,8 +183,8 @@
if (fdt_chk_extra() && !re)
return -FDT_ERR_BADOFFSET;
- *address = fdt64_ld(&re->address);
- *size = fdt64_ld(&re->size);
+ *address = fdt64_to_cpu(re->address);
+ *size = fdt64_to_cpu(re->size);
return 0;
}
@@ -194,7 +194,7 @@
const struct fdt_reserve_entry *re;
for (i = 0; (re = fdt_mem_rsv(fdt, i)) != NULL; i++) {
- if (fdt64_ld(&re->size) == 0)
+ if (fdt64_to_cpu(re->size) == 0)
return i;
}
return -FDT_ERR_TRUNCATED;
@@ -372,7 +372,7 @@
prop = fdt_offset_ptr_(fdt, offset);
if (lenp)
- *lenp = fdt32_ld(&prop->len);
+ *lenp = fdt32_to_cpu(prop->len);
return prop;
}
@@ -410,7 +410,7 @@
offset = -FDT_ERR_INTERNAL;
break;
}
- if (fdt_string_eq_(fdt, fdt32_ld(&prop->nameoff),
+ if (fdt_string_eq_(fdt, fdt32_to_cpu(prop->nameoff),
name, namelen)) {
if (poffset)
*poffset = offset;
@@ -463,7 +463,7 @@
/* Handle realignment */
if (fdt_chk_version() && fdt_version(fdt) < 0x10 &&
- (poffset + sizeof(*prop)) % 8 && fdt32_ld(&prop->len) >= 8)
+ (poffset + sizeof(*prop)) % 8 && fdt32_to_cpu(prop->len) >= 8)
return prop->data + 4;
return prop->data;
}
@@ -481,7 +481,7 @@
int namelen;
if (fdt_chk_extra()) {
- name = fdt_get_string(fdt, fdt32_ld(&prop->nameoff),
+ name = fdt_get_string(fdt, fdt32_to_cpu(prop->nameoff),
&namelen);
if (!name) {
if (lenp)
@@ -490,13 +490,13 @@
}
*namep = name;
} else {
- *namep = fdt_string(fdt, fdt32_ld(&prop->nameoff));
+ *namep = fdt_string(fdt, fdt32_to_cpu(prop->nameoff));
}
}
/* Handle realignment */
if (fdt_chk_version() && fdt_version(fdt) < 0x10 &&
- (offset + sizeof(*prop)) % 8 && fdt32_ld(&prop->len) >= 8)
+ (offset + sizeof(*prop)) % 8 && fdt32_to_cpu(prop->len) >= 8)
return prop->data + 4;
return prop->data;
}
@@ -521,7 +521,7 @@
return 0;
}
- return fdt32_ld(php);
+ return fdt32_to_cpu(*php);
}
const char *fdt_get_alias_namelen(const void *fdt,