@@ -542,3 +542,14 @@ int bloblist_maybe_init(void)
return 0;
}
+
+int bloblist_check_reg_conv(ulong rfdt, ulong rzero, ulong rsig)
+{
+ if (rzero || rsig != (BLOBLIST_MAGIC | BLOBLIST_REGCONV_VER) ||
+ rfdt != (ulong)bloblist_find(BLOBLISTT_CONTROL_FDT, 0)) {
+ gd->bloblist = NULL; /* Reset the gd bloblist pointer */
+ return -EIO;
+ }
+
+ return 0;
+}
@@ -78,6 +78,13 @@ enum {
BLOBLIST_VERSION = 1,
BLOBLIST_MAGIC = 0x4a0fb10b,
+ /*
+ * FIXME:
+ * Register convention version should be placed into a higher byte
+ * https://github.com/FirmwareHandoff/firmware_handoff/issues/32
+ */
+ BLOBLIST_REGCONV_VER = 1 << 24,
+
BLOBLIST_BLOB_ALIGN_LOG2 = 3,
BLOBLIST_BLOB_ALIGN = 1 << BLOBLIST_BLOB_ALIGN_LOG2,
@@ -461,4 +468,17 @@ static inline int bloblist_maybe_init(void)
}
#endif /* BLOBLIST */
+/**
+ * bloblist_check_reg_conv() - Check whether the bloblist is compliant to
+ * the register conventions according to the
+ * Firmware Handoff spec.
+ *
+ * @rfdt: Register that holds the FDT base address.
+ * @rzero: Register that must be zero.
+ * @rsig: Register that holds signature and register conventions version.
+ * Return: 0 if OK, -EIO if the bloblist is not compliant to the register
+ * conventions.
+ */
+int bloblist_check_reg_conv(ulong rfdt, ulong rzero, ulong rsig);
+
#endif /* __BLOBLIST_H */
Add bloblist_check_reg_conv() to check whether the bloblist is compliant to the register conventions defined in Firmware Handoff specification. This API can be used for all Arm platforms. Signed-off-by: Raymond Mao <raymond.mao@linaro.org> --- Changes in v2 - Refactor of bloblist_check_reg_conv(). Changes in v3 - bloblist_check_reg_conv() returns -ENOENT if OF_BOARD is disabled. Changes in v4 - Add checking of signature register. Changes in V5 - Drop the dependence on OF_BOARD. common/bloblist.c | 11 +++++++++++ include/bloblist.h | 20 ++++++++++++++++++++ 2 files changed, 31 insertions(+)