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
diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile index b1bcd37466..67275fba61 100644 --- a/arch/arm/lib/Makefile +++ b/arch/arm/lib/Makefile @@ -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 diff --git a/arch/arm/lib/xferlist.c b/arch/arm/lib/xferlist.c new file mode 100644 index 0000000000..f9c5d88bd4 --- /dev/null +++ b/arch/arm/lib/xferlist.c @@ -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); +} diff --git a/arch/arm/lib/xferlist.h b/arch/arm/lib/xferlist.h new file mode 100644 index 0000000000..60d79c1a8e --- /dev/null +++ b/arch/arm/lib/xferlist.h @@ -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_ */