include/hw/misc/iotkit-secctl.h

   1 /*
   2  * ARM IoT Kit security controller
   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 security controller which is part of the
  13  * Arm IoT Kit and documented in
  14  * http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ecm0601256/index.html
  15  *
  16  * QEMU interface:
  17  *  + sysbus MMIO region 0 is the "secure privilege control block" registers
  18  *  + sysbus MMIO region 1 is the "non-secure privilege control block" registers
  19  *  + named GPIO output "sec_resp_cfg" indicating whether blocked accesses
  20  *    should RAZ/WI or bus error
  21  *  + named GPIO output "nsc_cfg" whose value tracks the NSCCFG register value
  22  *  + named GPIO output "msc_irq" for the combined IRQ line from the MSCs
  23  * Controlling the 2 APB PPCs in the IoTKit:
  24  *  + named GPIO outputs apb_ppc0_nonsec[0..2] and apb_ppc1_nonsec
  25  *  + named GPIO outputs apb_ppc0_ap[0..2] and apb_ppc1_ap
  26  *  + named GPIO outputs apb_ppc{0,1}_irq_enable
  27  *  + named GPIO outputs apb_ppc{0,1}_irq_clear
  28  *  + named GPIO inputs apb_ppc{0,1}_irq_status
  29  * Controlling each of the 4 expansion APB PPCs which a system using the IoTKit
  30  * might provide:
  31  *  + named GPIO outputs apb_ppcexp{0,1,2,3}_nonsec[0..15]
  32  *  + named GPIO outputs apb_ppcexp{0,1,2,3}_ap[0..15]
  33  *  + named GPIO outputs apb_ppcexp{0,1,2,3}_irq_enable
  34  *  + named GPIO outputs apb_ppcexp{0,1,2,3}_irq_clear
  35  *  + named GPIO inputs apb_ppcexp{0,1,2,3}_irq_status
  36  * Controlling each of the 4 expansion AHB PPCs which a system using the IoTKit
  37  * might provide:
  38  *  + named GPIO outputs ahb_ppcexp{0,1,2,3}_nonsec[0..15]
  39  *  + named GPIO outputs ahb_ppcexp{0,1,2,3}_ap[0..15]
  40  *  + named GPIO outputs ahb_ppcexp{0,1,2,3}_irq_enable
  41  *  + named GPIO outputs ahb_ppcexp{0,1,2,3}_irq_clear
  42  *  + named GPIO inputs ahb_ppcexp{0,1,2,3}_irq_status
  43  * Controlling the (up to) 4 MPCs in the IoTKit/SSE:
  44  *  + named GPIO inputs mpc_status[0..3]
  45  * Controlling each of the 16 expansion MPCs which a system using the IoTKit
  46  * might provide:
  47  *  + named GPIO inputs mpcexp_status[0..15]
  48  * Controlling each of the 16 expansion MSCs which a system using the IoTKit
  49  * might provide:
  50  *  + named GPIO inputs mscexp_status[0..15]
  51  *  + named GPIO outputs mscexp_clear[0..15]
  52  *  + named GPIO outputs mscexp_ns[0..15]
  53  */
  54
  55 #ifndef IOTKIT_SECCTL_H
  56 #define IOTKIT_SECCTL_H
  57
  58 #include "hw/sysbus.h"
  59
  60 #define TYPE_IOTKIT_SECCTL "iotkit-secctl"
  61 #define IOTKIT_SECCTL(obj) OBJECT_CHECK(IoTKitSecCtl, (obj), TYPE_IOTKIT_SECCTL)
  62
  63 #define IOTS_APB_PPC0_NUM_PORTS 3
  64 #define IOTS_APB_PPC1_NUM_PORTS 1
  65 #define IOTS_PPC_NUM_PORTS 16
  66 #define IOTS_NUM_APB_PPC 2
  67 #define IOTS_NUM_APB_EXP_PPC 4
  68 #define IOTS_NUM_AHB_EXP_PPC 4
  69 #define IOTS_NUM_EXP_MPC 16
  70 #define IOTS_NUM_MPC 4
  71 #define IOTS_NUM_EXP_MSC 16
  72
  73 typedef struct IoTKitSecCtl IoTKitSecCtl;
  74
  75 /* State and IRQ lines relating to a PPC. For the
  76  * PPCs in the IoTKit not all the IRQ lines are used.
  77  */
  78 typedef struct IoTKitSecCtlPPC {
  79     qemu_irq nonsec[IOTS_PPC_NUM_PORTS];
  80     qemu_irq ap[IOTS_PPC_NUM_PORTS];
  81     qemu_irq irq_enable;
  82     qemu_irq irq_clear;
  83
  84     uint32_t ns;
  85     uint32_t sp;
  86     uint32_t nsp;
  87
  88     /* Number of ports actually present */
  89     int numports;
  90     /* Offset of this PPC's interrupt bits in SECPPCINTSTAT */
  91     int irq_bit_offset;
  92     IoTKitSecCtl *parent;
  93 } IoTKitSecCtlPPC;
  94
  95 struct IoTKitSecCtl {
  96     /*< private >*/
  97     SysBusDevice parent_obj;
  98
  99     /*< public >*/
 100     qemu_irq sec_resp_cfg;
 101     qemu_irq nsc_cfg_irq;
 102
 103     MemoryRegion s_regs;
 104     MemoryRegion ns_regs;
 105
 106     uint32_t secppcintstat;
 107     uint32_t secppcinten;
 108     uint32_t secrespcfg;
 109     uint32_t nsccfg;
 110     uint32_t brginten;
 111     uint32_t mpcintstatus;
 112
 113     uint32_t secmscintstat;
 114     uint32_t secmscinten;
 115     uint32_t nsmscexp;
 116     qemu_irq mscexp_clear[IOTS_NUM_EXP_MSC];
 117     qemu_irq mscexp_ns[IOTS_NUM_EXP_MSC];
 118     qemu_irq msc_irq;
 119
 120     IoTKitSecCtlPPC apb[IOTS_NUM_APB_PPC];
 121     IoTKitSecCtlPPC apbexp[IOTS_NUM_APB_EXP_PPC];
 122     IoTKitSecCtlPPC ahbexp[IOTS_NUM_APB_EXP_PPC];
 123 };
 124
 125 #endif