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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2017-2018, Intel Corporation
*/
#ifndef __STRATIX10_SMC_H
#define __STRATIX10_SMC_H
#include <linux/arm-smccc.h>
#include <linux/bitops.h>
/**
* This file defines the Secure Monitor Call (SMC) message protocol used for
* service layer driver in normal world (EL1) to communicate with secure
* monitor software in Secure Monitor Exception Level 3 (EL3).
*
* This file is shared with secure firmware (FW) which is out of kernel tree.
*
* An ARM SMC instruction takes a function identifier and up to 6 64-bit
* register values as arguments, and can return up to 4 64-bit register
* value. The operation of the secure monitor is determined by the parameter
* values passed in through registers.
*
* EL1 and EL3 communicates pointer as physical address rather than the
* virtual address.
*
* Functions specified by ARM SMC Calling convention:
*
* FAST call executes atomic operations, returns when the requested operation
* has completed.
* STD call starts a operation which can be preempted by a non-secure
* interrupt. The call can return before the requested operation has
* completed.
*
* a0..a7 is used as register names in the descriptions below, on arm32
* that translates to r0..r7 and on arm64 to w0..w7.
*/
/**
* @func_num: function ID
*/
#define INTEL_SIP_SMC_STD_CALL_VAL(func_num) \
ARM_SMCCC_CALL_VAL(ARM_SMCCC_STD_CALL, ARM_SMCCC_SMC_64, \
ARM_SMCCC_OWNER_SIP, (func_num))
#define INTEL_SIP_SMC_FAST_CALL_VAL(func_num) \
ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_64, \
ARM_SMCCC_OWNER_SIP, (func_num))
/**
* Return values in INTEL_SIP_SMC_* call
*
* INTEL_SIP_SMC_RETURN_UNKNOWN_FUNCTION:
* Secure monitor software doesn't recognize the request.
*
* INTEL_SIP_SMC_STATUS_OK:
* FPGA configuration completed successfully,
* In case of FPGA configuration write operation, it means secure monitor
* software can accept the next chunk of FPGA configuration data.
*
* INTEL_SIP_SMC_FPGA_CONFIG_STATUS_BUSY:
* In case of FPGA configuration write operation, it means secure monitor
* software is still processing previous data & can't accept the next chunk
* of data. Service driver needs to issue
* INTEL_SIP_SMC_FPGA_CONFIG_COMPLETED_WRITE call to query the
* completed block(s).
*
* INTEL_SIP_SMC_FPGA_CONFIG_STATUS_ERROR:
* There is error during the FPGA configuration process.
*
* INTEL_SIP_SMC_REG_ERROR:
* There is error during a read or write operation of the protected registers.
*
* INTEL_SIP_SMC_RSU_ERROR:
* There is error during a remote status update.
*/
#define INTEL_SIP_SMC_RETURN_UNKNOWN_FUNCTION 0xFFFFFFFF
#define INTEL_SIP_SMC_STATUS_OK 0x0
#define INTEL_SIP_SMC_FPGA_CONFIG_STATUS_BUSY 0x1
#define INTEL_SIP_SMC_FPGA_CONFIG_STATUS_REJECTED 0x2
#define INTEL_SIP_SMC_FPGA_CONFIG_STATUS_ERROR 0x4
#define INTEL_SIP_SMC_REG_ERROR 0x5
#define INTEL_SIP_SMC_RSU_ERROR 0x7
/**
* Request INTEL_SIP_SMC_FPGA_CONFIG_START
*
* Sync call used by service driver at EL1 to request the FPGA in EL3 to
* be prepare to receive a new configuration.
*
* Call register usage:
* a0: INTEL_SIP_SMC_FPGA_CONFIG_START.
* a1: flag for full or partial configuration. 0 for full and 1 for partial
* configuration.
* a2-7: not used.
*
* Return status:
* a0: INTEL_SIP_SMC_STATUS_OK, or INTEL_SIP_SMC_FPGA_CONFIG_STATUS_ERROR.
* a1-3: not used.
*/
#define INTEL_SIP_SMC_FUNCID_FPGA_CONFIG_START 1
#define INTEL_SIP_SMC_FPGA_CONFIG_START \
INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_FPGA_CONFIG_START)
/**
* Request INTEL_SIP_SMC_FPGA_CONFIG_WRITE
*
* Async call used by service driver at EL1 to provide FPGA configuration data
* to secure world.
*
* Call register usage:
* a0: INTEL_SIP_SMC_FPGA_CONFIG_WRITE.
* a1: 64bit physical address of the configuration data memory block
* a2: Size of configuration data block.
* a3-7: not used.
*
* Return status:
* a0: INTEL_SIP_SMC_STATUS_OK, INTEL_SIP_SMC_FPGA_CONFIG_STATUS_BUSY or
* INTEL_SIP_SMC_FPGA_CONFIG_STATUS_ERROR.
* a1: 64bit physical address of 1st completed memory block if any completed
* block, otherwise zero value.
* a2: 64bit physical address of 2nd completed memory block if any completed
* block, otherwise zero value.
* a3: 64bit physical address of 3rd completed memory block if any completed
* block, otherwise zero value.
*/
#define INTEL_SIP_SMC_FUNCID_FPGA_CONFIG_WRITE 2
#define INTEL_SIP_SMC_FPGA_CONFIG_WRITE \
INTEL_SIP_SMC_STD_CALL_VAL(INTEL_SIP_SMC_FUNCID_FPGA_CONFIG_WRITE)
/**
* Request INTEL_SIP_SMC_FPGA_CONFIG_COMPLETED_WRITE
*
* Sync call used by service driver at EL1 to track the completed write
* transactions. This request is called after INTEL_SIP_SMC_FPGA_CONFIG_WRITE
* call returns INTEL_SIP_SMC_FPGA_CONFIG_STATUS_BUSY.
*
* Call register usage:
* a0: INTEL_SIP_SMC_FPGA_CONFIG_COMPLETED_WRITE.
* a1-7: not used.
*
* Return status:
* a0: INTEL_SIP_SMC_STATUS_OK, INTEL_SIP_SMC_FPGA_CONFIG_STATUS_BUSY or
* INTEL_SIP_SMC_FPGA_CONFIG_STATUS_ERROR.
* a1: 64bit physical address of 1st completed memory block.
* a2: 64bit physical address of 2nd completed memory block if
* any completed block, otherwise zero value.
* a3: 64bit physical address of 3rd completed memory block if
* any completed block, otherwise zero value.
*/
#define INTEL_SIP_SMC_FUNCID_FPGA_CONFIG_COMPLETED_WRITE 3
#define INTEL_SIP_SMC_FPGA_CONFIG_COMPLETED_WRITE \
INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_FPGA_CONFIG_COMPLETED_WRITE)
/**
* Request INTEL_SIP_SMC_FPGA_CONFIG_ISDONE
*
* Sync call used by service driver at EL1 to inform secure world that all
* data are sent, to check whether or not the secure world had completed
* the FPGA configuration process.
*
* Call register usage:
* a0: INTEL_SIP_SMC_FPGA_CONFIG_ISDONE.
* a1-7: not used.
*
* Return status:
* a0: INTEL_SIP_SMC_STATUS_OK, INTEL_SIP_SMC_FPGA_CONFIG_STATUS_BUSY or
* INTEL_SIP_SMC_FPGA_CONFIG_STATUS_ERROR.
* a1-3: not used.
*/
#define INTEL_SIP_SMC_FUNCID_FPGA_CONFIG_ISDONE 4
#define INTEL_SIP_SMC_FPGA_CONFIG_ISDONE \
INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_FPGA_CONFIG_ISDONE)
/**
* Request INTEL_SIP_SMC_FPGA_CONFIG_GET_MEM
*
* Sync call used by service driver at EL1 to query the physical address of
* memory block reserved by secure monitor software.
*
* Call register usage:
* a0:INTEL_SIP_SMC_FPGA_CONFIG_GET_MEM.
* a1-7: not used.
*
* Return status:
* a0: INTEL_SIP_SMC_STATUS_OK or INTEL_SIP_SMC_FPGA_CONFIG_STATUS_ERROR.
* a1: start of physical address of reserved memory block.
* a2: size of reserved memory block.
* a3: not used.
*/
#define INTEL_SIP_SMC_FUNCID_FPGA_CONFIG_GET_MEM 5
#define INTEL_SIP_SMC_FPGA_CONFIG_GET_MEM \
INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_FPGA_CONFIG_GET_MEM)
/**
* Request INTEL_SIP_SMC_FPGA_CONFIG_LOOPBACK
*
* For SMC loop-back mode only, used for internal integration, debugging
* or troubleshooting.
*
* Call register usage:
* a0: INTEL_SIP_SMC_FPGA_CONFIG_LOOPBACK.
* a1-7: not used.
*
* Return status:
* a0: INTEL_SIP_SMC_STATUS_OK or INTEL_SIP_SMC_FPGA_CONFIG_STATUS_ERROR.
* a1-3: not used.
*/
#define INTEL_SIP_SMC_FUNCID_FPGA_CONFIG_LOOPBACK 6
#define INTEL_SIP_SMC_FPGA_CONFIG_LOOPBACK \
INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_FPGA_CONFIG_LOOPBACK)
/**
* Request INTEL_SIP_SMC_REG_READ
*
* Read a protected register at EL3
*
* Call register usage:
* a0: INTEL_SIP_SMC_REG_READ.
* a1: register address.
* a2-7: not used.
*
* Return status:
* a0: INTEL_SIP_SMC_STATUS_OK or INTEL_SIP_SMC_REG_ERROR.
* a1: value in the register
* a2-3: not used.
*/
#define INTEL_SIP_SMC_FUNCID_REG_READ 7
#define INTEL_SIP_SMC_REG_READ \
INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_REG_READ)
/**
* Request INTEL_SIP_SMC_REG_WRITE
*
* Write a protected register at EL3
*
* Call register usage:
* a0: INTEL_SIP_SMC_REG_WRITE.
* a1: register address
* a2: value to program into register.
* a3-7: not used.
*
* Return status:
* a0: INTEL_SIP_SMC_STATUS_OK or INTEL_SIP_SMC_REG_ERROR.
* a1-3: not used.
*/
#define INTEL_SIP_SMC_FUNCID_REG_WRITE 8
#define INTEL_SIP_SMC_REG_WRITE \
INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_REG_WRITE)
/**
* Request INTEL_SIP_SMC_FUNCID_REG_UPDATE
*
* Update one or more bits in a protected register at EL3 using a
* read-modify-write operation.
*
* Call register usage:
* a0: INTEL_SIP_SMC_REG_UPDATE.
* a1: register address
* a2: write Mask.
* a3: value to write.
* a4-7: not used.
*
* Return status:
* a0: INTEL_SIP_SMC_STATUS_OK or INTEL_SIP_SMC_REG_ERROR.
* a1-3: Not used.
*/
#define INTEL_SIP_SMC_FUNCID_REG_UPDATE 9
#define INTEL_SIP_SMC_REG_UPDATE \
INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_REG_UPDATE)
/**
* Request INTEL_SIP_SMC_RSU_STATUS
*
* Request remote status update boot log, call is synchronous.
*
* Call register usage:
* a0 INTEL_SIP_SMC_RSU_STATUS
* a1-7 not used
*
* Return status
* a0: Current Image
* a1: Last Failing Image
* a2: Version | State
* a3: Error details | Error location
*
* Or
*
* a0: INTEL_SIP_SMC_RSU_ERROR
*/
#define INTEL_SIP_SMC_FUNCID_RSU_STATUS 11
#define INTEL_SIP_SMC_RSU_STATUS \
INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_RSU_STATUS)
/**
* Request INTEL_SIP_SMC_RSU_UPDATE
*
* Request to set the offset of the bitstream to boot after reboot, call
* is synchronous.
*
* Call register usage:
* a0 INTEL_SIP_SMC_RSU_UPDATE
* a1 64bit physical address of the configuration data memory in flash
* a2-7 not used
*
* Return status
* a0 INTEL_SIP_SMC_STATUS_OK
*/
#define INTEL_SIP_SMC_FUNCID_RSU_UPDATE 12
#define INTEL_SIP_SMC_RSU_UPDATE \
INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_RSU_UPDATE)
/**
* Request INTEL_SIP_SMC_ECC_DBE
*
* Sync call used by service driver at EL1 to alert EL3 that a Double
* Bit ECC error has occurred.
*
* Call register usage:
* a0 INTEL_SIP_SMC_ECC_DBE
* a1 SysManager Double Bit Error value
* a2-7 not used
*
* Return status
* a0 INTEL_SIP_SMC_STATUS_OK
*/
#define INTEL_SIP_SMC_FUNCID_ECC_DBE 13
#define INTEL_SIP_SMC_ECC_DBE \
INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_ECC_DBE)
#endif
/**
* Request INTEL_SIP_SMC_RSU_NOTIFY
*
* Sync call used by service driver at EL1 to report hard processor
* system execution stage to firmware
*
* Call register usage:
* a0 INTEL_SIP_SMC_RSU_NOTIFY
* a1 32bit value representing hard processor system execution stage
* a2-7 not used
*
* Return status
* a0 INTEL_SIP_SMC_STATUS_OK
*/
#define INTEL_SIP_SMC_FUNCID_RSU_NOTIFY 14
#define INTEL_SIP_SMC_RSU_NOTIFY \
INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_RSU_NOTIFY)
/**
* Request INTEL_SIP_SMC_RSU_RETRY_COUNTER
*
* Sync call used by service driver at EL1 to query RSU retry counter
*
* Call register usage:
* a0 INTEL_SIP_SMC_RSU_RETRY_COUNTER
* a1-7 not used
*
* Return status
* a0 INTEL_SIP_SMC_STATUS_OK
* a1 the retry counter
*
* Or
*
* a0 INTEL_SIP_SMC_RSU_ERROR
*/
#define INTEL_SIP_SMC_FUNCID_RSU_RETRY_COUNTER 15
#define INTEL_SIP_SMC_RSU_RETRY_COUNTER \
INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_RSU_RETRY_COUNTER)