From 748da8abb0d020bedbfa4dbc7b3cafdaf9bc60f1 Mon Sep 17 00:00:00 2001 From: Rasmus Villemoes Date: Mon, 20 Jun 2022 10:53:19 +0200 Subject: imx8: add rom api wrappers The ROM API is thoroughly undocumented, but apparently passing the xor of the real arguments as an extra argument is required [1]. Also, we need to do the "save gd/restore gd" dance. These are both error-prone, and lead to a lot of code duplication. Since both imx8m[np] and imx8ulp SOCs have this, add a separate translation unit which is included precisely when the new CONFIG_IMX8_ROMAPI symbol is set, which provide convenience wrappers that take care of computing the xor value as well as doing the gd dance, and that thus have a more intuitive API. Subsequent patches will make use of these to reduce boilerplate. [1] One wonders, for example, if the check is only applied to the lower 32 bits, or if we're implicitly relying on all 64-bit pointer values we're passing effectively have 0 in the upper 32 bits. Reviewed-by: Peng Fan Signed-off-by: Rasmus Villemoes --- arch/arm/include/asm/mach-imx/sys_proto.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'arch/arm/include') diff --git a/arch/arm/include/asm/mach-imx/sys_proto.h b/arch/arm/include/asm/mach-imx/sys_proto.h index 02816197c10..fadb67d04a2 100644 --- a/arch/arm/include/asm/mach-imx/sys_proto.h +++ b/arch/arm/include/asm/mach-imx/sys_proto.h @@ -178,6 +178,10 @@ enum boot_dev_type_e { #define ROM_API_OKAY 0xF0 extern struct rom_api *g_rom_api; + +u32 rom_api_download_image(u8 *dest, u32 offset, u32 size); +u32 rom_api_query_boot_infor(u32 info_type, u32 *info); + #endif /* For i.MX ULP */ -- cgit v1.3.1