u-boot/arch/arm/cpu/armv8/sec_firmware_asm.S
Hou Zhiqiang b45db3b590 ARMv8: add the secure monitor firmware framework
This framework is introduced for ARMv8 secure monitor mode firmware.
The main functions of the framework are, on EL3, verify the firmware,
load it to the secure memory and jump into it, and while it returned
to U-Boot, do some necessary setups at the 'target exception level'
that is determined by the respective secure firmware.

So far, the framework support only FIT format image, and need to define
the name of which config node should be used in 'configurations' and
the name of property for the raw secure firmware image in that config.
The FIT image should be stored in Byte accessing memory, such as NOR
Flash, or else it should be copied to main memory to use this framework.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
2016-07-19 11:33:03 -07:00

53 lines
968 B
ArmAsm

/*
* 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 SEC_FIRMWARE_ERET_ADDR_REVERT
rev w3, w3
#endif
str w3, [x1]
lsr x3, x4, #32
#ifdef 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_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)
#endif