1 /* 2 * ARM AHB5 TrustZone Memory Protection Controller emulation 3 * 4 * Copyright (c) 2018 Linaro Limited 5 * Written by Peter Maydell 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 or 9 * (at your option) any later version. 10 */ 11 12 /* This is a model of the TrustZone memory protection controller (MPC). 13 * It is documented in the ARM CoreLink SIE-200 System IP for Embedded TRM 14 * (DDI 0571G): 15 * https://developer.arm.com/products/architecture/m-profile/docs/ddi0571/g 16 * 17 * The MPC sits in front of memory and allows secure software to 18 * configure it to either pass through or reject transactions. 19 * Rejected transactions may be configured to either be aborted, or to 20 * behave as RAZ/WI. An interrupt can be signalled for a rejected transaction. 21 * 22 * The MPC has a register interface which the guest uses to configure it. 23 * 24 * QEMU interface: 25 * + sysbus MMIO region 0: MemoryRegion for the MPC's config registers 26 * + sysbus MMIO region 1: MemoryRegion for the upstream end of the MPC 27 * + Property "downstream": MemoryRegion defining the downstream memory 28 * + Named GPIO output "irq": set for a transaction-failed interrupt 29 */ 30 31 #ifndef TZ_MPC_H 32 #define TZ_MPC_H 33 34 #include "hw/sysbus.h" 35 36 #define TYPE_TZ_MPC "tz-mpc" 37 #define TZ_MPC(obj) OBJECT_CHECK(TZMPC, (obj), TYPE_TZ_MPC) 38 39 #define TZ_NUM_PORTS 16 40 41 #define TYPE_TZ_MPC_IOMMU_MEMORY_REGION "tz-mpc-iommu-memory-region" 42 43 typedef struct TZMPC TZMPC; 44 45 struct TZMPC { 46 /*< private >*/ 47 SysBusDevice parent_obj; 48 49 /*< public >*/ 50 51 /* State */ 52 uint32_t ctrl; 53 uint32_t blk_idx; 54 uint32_t int_stat; 55 uint32_t int_en; 56 uint32_t int_info1; 57 uint32_t int_info2; 58 59 uint32_t *blk_lut; 60 61 qemu_irq irq; 62 63 /* Properties */ 64 MemoryRegion *downstream; 65 66 hwaddr blocksize; 67 uint32_t blk_max; 68 69 /* MemoryRegions exposed to user */ 70 MemoryRegion regmr; 71 IOMMUMemoryRegion upstream; 72 73 /* MemoryRegion used internally */ 74 MemoryRegion blocked_io; 75 76 AddressSpace downstream_as; 77 AddressSpace blocked_io_as; 78 }; 79 80 #endif 81