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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 * https://developer.arm.com/documentation/ecm0601256/latest
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/core/sysbus.h"
59 #include "qom/object.h"
60
61 #define TYPE_IOTKIT_SECCTL "iotkit-secctl"
62 OBJECT_DECLARE_SIMPLE_TYPE(IoTKitSecCtl, IOTKIT_SECCTL)
63
64 #define IOTS_APB_PPC0_NUM_PORTS 3
65 #define IOTS_APB_PPC1_NUM_PORTS 1
66 #define IOTS_PPC_NUM_PORTS 16
67 #define IOTS_NUM_APB_PPC 2
68 #define IOTS_NUM_APB_EXP_PPC 4
69 #define IOTS_NUM_AHB_EXP_PPC 4
70 #define IOTS_NUM_EXP_MPC 16
71 #define IOTS_NUM_MPC 4
72 #define IOTS_NUM_EXP_MSC 16
73
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 uint32_t sse_version;
125 };
126
127 #endif