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| /*
| * Copyright 2016 NXP Semiconductor, Inc.
| *
| * SPDX-License-Identifier: GPL-2.0+
| */
|
| #include <config.h>
| #include <linux/linkage.h>
| #include <asm/system.h>
| #include <asm/macro.h>
|
| WEAK(_sec_firmware_entry)
| /*
| * x0: Secure Firmware entry point
| * x1: Exception return address Low
| * x2: Exception return address High
| */
|
| /* Save stack pointer for EL2 */
| mov x3, sp
| msr sp_el2, x3
|
| /* Set exception return address hold pointer */
| adr x4, 1f
| mov x3, x4
| #ifdef CONFIG_ARMV8_SEC_FIRMWARE_ERET_ADDR_REVERT
| rev w3, w3
| #endif
| str w3, [x1]
| lsr x3, x4, #32
| #ifdef CONFIG_ARMV8_SEC_FIRMWARE_ERET_ADDR_REVERT
| rev w3, w3
| #endif
| str w3, [x2]
|
| /* Call SEC monitor */
| br x0
|
| 1:
| mov x0, #0
| ret
| ENDPROC(_sec_firmware_entry)
|
| #ifdef CONFIG_SEC_FIRMWARE_ARMV8_PSCI
| ENTRY(_sec_firmware_support_psci_version)
| mov x0, 0x84000000
| mov x1, 0x0
| mov x2, 0x0
| mov x3, 0x0
| 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: input argument
| * x4: 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 x3, x2
| mov x2, x1
| mov x1, x4
| ldr x0, =0xc000ff04
| smc #0
| ret
| ENDPROC(armv8_el2_to_aarch32)
| #endif
|
|
