diff options
| author | Peng Fan <peng.fan@nxp.com> | 2020-07-10 11:22:20 +0800 |
|---|---|---|
| committer | Peng Fan <peng.fan@nxp.com> | 2020-07-14 15:23:48 +0800 |
| commit | eb3967388e7707edb21dd537b77a30f57e706fac (patch) | |
| tree | 1a56b447165b4d687172e1f0a34efdacda6bfcd7 /arch/arm | |
| parent | 3c41728d80f7a6178dd4ec91c28347d9768ab200 (diff) | |
imx8m: implement armv8_el2_to_aarch32
Add iMX8M specific armv8_el2_to_aarch32 to let AArch64 mode U-Boot
could boot aarch32 mode linux with FIT image as below:
/dts-v1/;
/ {
description = "Configuration to load ARM32 Linux";
images {
kernel@1 {
description = "ARM32 Linux kernel";
data = /incbin/("./Image");
type = "kernel";
arch = "arm";
os = "linux";
compression = "none";
load = <0x40008000>;
entry = <0x40008000>;
hash@1 {
algo = "md5";
};
};
fdt@1 {
description = "Flattened Device Tree blob";
data = /incbin/("./imx8mm-evk.dtb");
type = "flat_dt";
arch = "arm";
compression = "none";
load = <0x43000000>;
hash@1 {
algo = "md5";
};
};
};
configurations {
default = "config@1";
config@1 {
description = "fsl-imx8mm-evk";
kernel = "kernel@1";
fdt = "fdt@1";
};
};
};
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-imx/imx8m/lowlevel_init.S | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/imx8m/lowlevel_init.S b/arch/arm/mach-imx/imx8m/lowlevel_init.S index a4c6466ca9..a49a9cdb35 100644 --- a/arch/arm/mach-imx/imx8m/lowlevel_init.S +++ b/arch/arm/mach-imx/imx8m/lowlevel_init.S @@ -60,3 +60,15 @@ restore_boot_params: ldr x0, [x0] mov sp, x0 ret + +.global armv8_el2_to_aarch32 +armv8_el2_to_aarch32: + cmp x0, #0 + bne 0f + mov x3, x2 + mov x2, x1 + mov x1, x4 + ldr x0, =0xc20000fd +0: + smc #0 + ret |