@@ -85,6 +85,8 @@ obj-y += psci-dt.o
obj-$(CONFIG_DEBUG_LL) += debug.o
+obj-$(CONFIG_BLOBLIST) += xferlist.o
+
# For EABI conformant tool chains, provide eabi_compat()
ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS)))
extra-y += eabi_compat.o
new file mode 100644
@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2023 Linaro Limited
+ * Author: Raymond Mao <raymond.mao@linaro.org>
+ */
+#include <linux/types.h>
+#include <errno.h>
+#include <bloblist.h>
+#include "xferlist.h"
+
+int xferlist_from_boot_arg(ulong addr, ulong size)
+{
+ int ret;
+
+ ret = bloblist_check(saved_args[3], size);
+ if (ret)
+ return ret;
+
+ ret = bloblist_check_reg_conv(saved_args[0], saved_args[2],
+ saved_args[1]);
+ if (ret)
+ return ret;
+
+ return bloblist_reloc((void *)addr, size);
+}
new file mode 100644
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0+ BSD-3-Clause */
+/*
+ * Copyright (C) 2023 Linaro Limited
+ * Author: Raymond Mao <raymond.mao@linaro.org>
+ */
+
+#ifndef _XFERLIST_H_
+#define _XFERLIST_H_
+
+/*
+ * Boot parameters saved from start.S
+ * saved_args[0]: FDT base address
+ * saved_args[1]: Bloblist signature
+ * saved_args[2]: must be 0
+ * saved_args[3]: Bloblist base address
+ */
+extern unsigned long saved_args[];
+
+#endif /* _XFERLIST_H_ */
Add arch custom function to get bloblist from boot arguments. Check whether boot arguments aligns with the register conventions defined in FW Handoff spec v0.9. Signed-off-by: Raymond Mao <raymond.mao@linaro.org> --- Changes in v2 - Remove low level code for copying boot arguments. - Refactor board_fdt_blob_setup() and remove direct access of gd->bloblist. Changes in v3 - Optimize board_bloblist_from_boot_arg(). Changes in v4 - Move the function as an Arm-arch library instead of a board-specific one. Changes in V5 - Drop the dependence on OF_BOARD. - Move external declaration to header file. - Adjust the position of BLOBLIST in defconfig file. Changes in V6 - Drop imply OF_HAS_PRIOR_STAGE from qemu-arm. Changes in V7 - Revert changes in V6. - Remove BLOBLIST_ settings from qemu_arm64_defconfig. arch/arm/lib/Makefile | 2 ++ arch/arm/lib/xferlist.c | 25 +++++++++++++++++++++++++ arch/arm/lib/xferlist.h | 19 +++++++++++++++++++ 3 files changed, 46 insertions(+) create mode 100644 arch/arm/lib/xferlist.c create mode 100644 arch/arm/lib/xferlist.h