diff options
| author | Tom Rini <trini@konsulko.com> | 2020-01-27 12:10:31 -0500 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2020-01-30 13:30:35 -0500 |
| commit | e8c2d25845c72c7202a628a97d45e31beea40668 (patch) | |
| tree | 4edcfaded2876ed931998a8686d2220a61e443e0 /lib | |
| parent | 84f0415201e57e1919a2c91684e64bdedd85d159 (diff) | |
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>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/libfdt/fdt_ro.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/lib/libfdt/fdt_ro.c b/lib/libfdt/fdt_ro.c index 560041b603..be03aea9eb 100644 --- a/lib/libfdt/fdt_ro.c +++ b/lib/libfdt/fdt_ro.c @@ -183,8 +183,8 @@ int fdt_get_mem_rsv(const void *fdt, int n, uint64_t *address, uint64_t *size) 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 @@ 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_ld(&re->size) == 0) + if (fdt64_to_cpu(re->size) == 0) return i; } return -FDT_ERR_TRUNCATED; @@ -372,7 +372,7 @@ static const struct fdt_property *fdt_get_property_by_offset_(const void *fdt, 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 @@ static const struct fdt_property *fdt_get_property_namelen_(const void *fdt, 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 @@ const void *fdt_getprop_namelen(const void *fdt, int nodeoffset, /* 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 @@ const void *fdt_getprop_by_offset(const void *fdt, int offset, 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 @@ const void *fdt_getprop_by_offset(const void *fdt, int offset, } *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 @@ uint32_t fdt_get_phandle(const void *fdt, int nodeoffset) return 0; } - return fdt32_ld(php); + return fdt32_to_cpu(*php); } const char *fdt_get_alias_namelen(const void *fdt, |