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().
common/bloblist.c | 13 +++++++++++++ include/bloblist.h | 12 ++++++++++++ 2 files changed, 25 insertions(+)
diff --git a/common/bloblist.c b/common/bloblist.c index 625e480f6b..193122a8af 100644 --- a/common/bloblist.c +++ b/common/bloblist.c @@ -542,3 +542,16 @@ int bloblist_maybe_init(void)
return 0; } + +int bloblist_check_reg_conv(ulong rfdt, ulong rzero) +{ + if (!IS_ENABLED(CONFIG_OF_BOARD)) + return 0; + + if (rzero || rfdt != (ulong)bloblist_find(BLOBLISTT_CONTROL_FDT, 0)) { + gd->bloblist = NULL; /* Reset the gd bloblist pointer */ + return -EIO; + } + + return 0; +} diff --git a/include/bloblist.h b/include/bloblist.h index 84fc943819..b5d0f147f6 100644 --- a/include/bloblist.h +++ b/include/bloblist.h @@ -461,4 +461,16 @@ 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. + * Return: 0 if OK, -EIO if the bloblist is not compliant to the register + * conventions. + */ +int bloblist_check_reg_conv(ulong rfdt, ulong rzero); + #endif /* __BLOBLIST_H */