SPM: Get rid of uint32_t array representation of UUID
UUID's in the device tree files were stored in little endian. So
to keep all entries in these files RFC 4122 compliant, store them in
big endian then convert it to little endian when they are read so they
can be used in the UUID data structure.
Signed-off-by: Ruari Phipps <ruari.phipps@arm.com>
Change-Id: I5674159b82b245104381df10a4e3291160d9b3b5
diff --git a/plat/arm/common/fconf/arm_fconf_io.c b/plat/arm/common/fconf/arm_fconf_io.c
index 5f125d3..48286c2 100644
--- a/plat/arm/common/fconf/arm_fconf_io.c
+++ b/plat/arm/common/fconf/arm_fconf_io.c
@@ -249,6 +249,7 @@
{
int err, node;
unsigned int i;
+ unsigned int j;
union uuid_helper_t uuid_helper;
io_uuid_spec_t *uuid_ptr;
@@ -274,6 +275,15 @@
return err;
}
+ /* Convert uuid from big endian to little endian */
+ for (j = 0U; j < 4U; j++) {
+ uuid_helper.word[j] =
+ ((uuid_helper.word[j] >> 24U) & 0xff) |
+ ((uuid_helper.word[j] << 8U) & 0xff0000) |
+ ((uuid_helper.word[j] >> 8U) & 0xff00) |
+ ((uuid_helper.word[j] << 24U) & 0xff000000);
+ }
+
VERBOSE("FCONF: arm-io_policies.%s cell found with value = 0x%x 0x%x 0x%x 0x%x\n",
load_info[i].name,
uuid_helper.word[0], uuid_helper.word[1],