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/*
* ARM AHB5 TrustZone Memory Protection Controller emulation
*
* Copyright (c) 2018 Linaro Limited
* Written by Peter Maydell
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 or
* (at your option) any later version.
*/
/* This is a model of the TrustZone memory protection controller (MPC).
* It is documented in the ARM CoreLink SIE-200 System IP for Embedded TRM
* (DDI 0571G):
* https://developer.arm.com/products/architecture/m-profile/docs/ddi0571/g
*
* The MPC sits in front of memory and allows secure software to
* configure it to either pass through or reject transactions.
* Rejected transactions may be configured to either be aborted, or to
* behave as RAZ/WI. An interrupt can be signalled for a rejected transaction.
*
* The MPC has a register interface which the guest uses to configure it.
*
* QEMU interface:
* + sysbus MMIO region 0: MemoryRegion for the MPC's config registers
* + sysbus MMIO region 1: MemoryRegion for the upstream end of the MPC
* + Property "downstream": MemoryRegion defining the downstream memory
* + Named GPIO output "irq": set for a transaction-failed interrupt
*/
#ifndef TZ_MPC_H
#define TZ_MPC_H
#include "hw/sysbus.h"
#define TYPE_TZ_MPC "tz-mpc"
#define TZ_MPC(obj) OBJECT_CHECK(TZMPC, (obj), TYPE_TZ_MPC)
#define TZ_NUM_PORTS 16
#define TYPE_TZ_MPC_IOMMU_MEMORY_REGION "tz-mpc-iommu-memory-region"
typedef struct TZMPC TZMPC;
struct TZMPC {
/*< private >*/
SysBusDevice parent_obj;
/*< public >*/
/* State */
uint32_t ctrl;
uint32_t blk_idx;
uint32_t int_stat;
uint32_t int_en;
uint32_t int_info1;
uint32_t int_info2;
uint32_t *blk_lut;
qemu_irq irq;
/* Properties */
MemoryRegion *downstream;
hwaddr blocksize;
uint32_t blk_max;
/* MemoryRegions exposed to user */
MemoryRegion regmr;
IOMMUMemoryRegion upstream;
/* MemoryRegion used internally */
MemoryRegion blocked_io;
AddressSpace downstream_as;
AddressSpace blocked_io_as;
};
#endif
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