/*
* Copyright (c) 2014, ARM Limited and Contributors. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of ARM nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __TZC400_H__
#define __TZC400_H__
#include <stdint.h>
#define BUILD_CONFIG_OFF 0x000
#define ACTION_OFF 0x004
#define GATE_KEEPER_OFF 0x008
#define SPECULATION_CTRL_OFF 0x00c
#define INT_STATUS 0x010
#define INT_CLEAR 0x014
#define FAIL_ADDRESS_LOW_OFF 0x020
#define FAIL_ADDRESS_HIGH_OFF 0x024
#define FAIL_CONTROL_OFF 0x028
#define FAIL_ID 0x02c
#define REGION_BASE_LOW_OFF 0x100
#define REGION_BASE_HIGH_OFF 0x104
#define REGION_TOP_LOW_OFF 0x108
#define REGION_TOP_HIGH_OFF 0x10c
#define REGION_ATTRIBUTES_OFF 0x110
#define REGION_ID_ACCESS_OFF 0x114
#define REGION_NUM_OFF(region) (0x20 * region)
/* ID Registers */
#define PID0_OFF 0xfe0
#define PID1_OFF 0xfe4
#define PID2_OFF 0xfe8
#define PID3_OFF 0xfec
#define PID4_OFF 0xfd0
#define PID5_OFF 0xfd4
#define PID6_OFF 0xfd8
#define PID7_OFF 0xfdc
#define CID0_OFF 0xff0
#define CID1_OFF 0xff4
#define CID2_OFF 0xff8
#define CID3_OFF 0xffc
#define BUILD_CONFIG_NF_SHIFT 24
#define BUILD_CONFIG_NF_MASK 0x3
#define BUILD_CONFIG_AW_SHIFT 8
#define BUILD_CONFIG_AW_MASK 0x3f
#define BUILD_CONFIG_NR_SHIFT 0
#define BUILD_CONFIG_NR_MASK 0x1f
/* Not describing the case where regions 1 to 8 overlap */
#define ACTION_RV_SHIFT 0
#define ACTION_RV_MASK 0x3
#define ACTION_RV_LOWOK 0x0
#define ACTION_RV_LOWERR 0x1
#define ACTION_RV_HIGHOK 0x2
#define ACTION_RV_HIGHERR 0x3
/*
* Number of gate keepers is implementation defined. But we know the max for
* this device is 4. Get implementation details from BUILD_CONFIG.
*/
#define GATE_KEEPER_OS_SHIFT 16
#define GATE_KEEPER_OS_MASK 0xf
#define GATE_KEEPER_OR_SHIFT 0
#define GATE_KEEPER_OR_MASK 0xf
/* Speculation is enabled by default. */
#define SPECULATION_CTRL_WRITE_DISABLE (1 << 1)
#define SPECULATION_CTRL_READ_DISABLE (1 << 0)
/* Max number of filters allowed is 4. */
#define INT_STATUS_OVERLAP_SHIFT 16
#define INT_STATUS_OVERLAP_MASK 0xf
#define INT_STATUS_OVERRUN_SHIFT 8
#define INT_STATUS_OVERRUN_MASK 0xf
#define INT_STATUS_STATUS_SHIFT 0
#define INT_STATUS_STATUS_MASK 0xf
#define INT_CLEAR_CLEAR_SHIFT 0
#define INT_CLEAR_CLEAR_MASK 0xf
#define FAIL_CONTROL_DIR_SHIFT (1 << 24)
#define FAIL_CONTROL_DIR_READ 0x0
#define FAIL_CONTROL_DIR_WRITE 0x1
#define FAIL_CONTROL_NS_SHIFT (1 << 21)
#define FAIL_CONTROL_NS_SECURE 0x0
#define FAIL_CONTROL_NS_NONSECURE 0x1
#define FAIL_CONTROL_PRIV_SHIFT (1 << 20)
#define FAIL_CONTROL_PRIV_PRIV 0x0
#define FAIL_CONTROL_PRIV_UNPRIV 0x1
/*
* FAIL_ID_ID_MASK depends on AID_WIDTH which is platform specific.
* Platform should provide the value on initialisation.
*/
#define FAIL_ID_VNET_SHIFT 24
#define FAIL_ID_VNET_MASK 0xf
#define FAIL_ID_ID_SHIFT 0
/* Used along with 'tzc_region_attributes_t' below */
#define REGION_ATTRIBUTES_SEC_SHIFT 30
#define REGION_ATTRIBUTES_F_EN_SHIFT 0
#define REGION_ATTRIBUTES_F_EN_MASK 0xf
#define REGION_ID_ACCESS_NSAID_WR_EN_SHIFT 16
#define REGION_ID_ACCESS_NSAID_RD_EN_SHIFT 0
#define REGION_ID_ACCESS_NSAID_ID_MASK 0xf
/* Macros for setting Region ID access permissions based on NSAID */
#define TZC_REGION_ACCESS_RD(id) \
((1 << (id & REGION_ID_ACCESS_NSAID_ID_MASK)) << \
REGION_ID_ACCESS_NSAID_RD_EN_SHIFT)
#define TZC_REGION_ACCESS_WR(id) \
((1 << (id & REGION_ID_ACCESS_NSAID_ID_MASK)) << \
REGION_ID_ACCESS_NSAID_WR_EN_SHIFT)
#define TZC_REGION_ACCESS_RDWR(id) \
(TZC_REGION_ACCESS_RD(id) | TZC_REGION_ACCESS_WR(id))
/* Filters are bit mapped 0 to 3. */
#define TZC400_COMPONENT_ID 0xb105f00d
#ifndef __ASSEMBLY__
/*******************************************************************************
* Function & variable prototypes
******************************************************************************/
/*
* What type of action is expected when an access violation occurs.
* The memory requested is zeroed. But we can also raise and event to
* let the system know it happened.
* We can raise an interrupt(INT) and/or cause an exception(ERR).
* TZC_ACTION_NONE - No interrupt, no Exception
* TZC_ACTION_ERR - No interrupt, raise exception -> sync external
* data abort
* TZC_ACTION_INT - Raise interrupt, no exception
* TZC_ACTION_ERR_INT - Raise interrupt, raise exception -> sync
* external data abort
*/
enum tzc_action {
TZC_ACTION_NONE = 0,
TZC_ACTION_ERR = 1,
TZC_ACTION_INT = 2,
TZC_ACTION_ERR_INT = (TZC_ACTION_ERR | TZC_ACTION_INT)
};
/*
* Controls secure access to a region. If not enabled secure access is not
* allowed to region.
*/
enum tzc_region_attributes {
TZC_REGION_S_NONE = 0,
TZC_REGION_S_RD = 1,
TZC_REGION_S_WR = 2,
TZC_REGION_S_RDWR = (TZC_REGION_S_RD | TZC_REGION_S_WR)
};
/*
* Implementation defined values used to validate inputs later.
* Filters : max of 4 ; 0 to 3
* Regions : max of 9 ; 0 to 8
* Address width : Values between 32 to 64
*/
struct tzc_instance {
uint64_t base;
uint32_t aid_width;
uint8_t addr_width;
uint8_t num_filters;
uint8_t num_regions;
};
void tzc_init(struct tzc_instance *controller);
void tzc_configure_region(const struct tzc_instance *controller, uint32_t filters,
uint8_t region, uint64_t region_base, uint64_t region_top,
enum tzc_region_attributes sec_attr, uint32_t ns_device_access);
void tzc_enable_filters(const struct tzc_instance *controller);
void tzc_disable_filters(const struct tzc_instance *controller);
void tzc_set_action(const struct tzc_instance *controller,
enum tzc_action action);
#endif /*__ASSEMBLY__*/
#endif /* __TZC400__ */
