diff options
Diffstat (limited to 'arch/arm/cpu/armv8/sec_firmware_asm.S')
| -rw-r--r-- | arch/arm/cpu/armv8/sec_firmware_asm.S | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv8/sec_firmware_asm.S b/arch/arm/cpu/armv8/sec_firmware_asm.S index 0c6a462..1b39f1d 100644 --- a/arch/arm/cpu/armv8/sec_firmware_asm.S +++ b/arch/arm/cpu/armv8/sec_firmware_asm.S @@ -50,4 +50,27 @@ ENTRY(_sec_firmware_support_psci_version) smc #0 ret ENDPROC(_sec_firmware_support_psci_version) + +/* + * Switch from AArch64 EL2 to AArch32 EL2 + * @param inputs: + * x0: argument, zero + * x1: machine nr + * x2: fdt address + * x3: kernel entry point + * @param outputs for secure firmware: + * x0: function id + * x1: kernel entry point + * x2: machine nr + * x3: fdt address +*/ +ENTRY(armv8_el2_to_aarch32) + mov x0, x3 + mov x3, x2 + mov x2, x1 + mov x1, x0 + ldr x0, =0xc000ff04 + smc #0 + ret +ENDPROC(armv8_el2_to_aarch32) #endif |