xref: /openbmc/qemu/include/hw/arm/armsse.h (revision 5b5968c4)
1 /*
2  * ARM SSE (Subsystems for Embedded): IoTKit, SSE-200
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 /*
13  * This is a model of the Arm "Subsystems for Embedded" family of
14  * hardware, which include the IoT Kit and the SSE-050, SSE-100 and
15  * SSE-200. Currently we model:
16  *  - the Arm IoT Kit which is documented in
17  *    https://developer.arm.com/documentation/ecm0601256/latest
18  *  - the SSE-200 which is documented in
19  *    https://developer.arm.com/documentation/101104/latest/
20  *
21  * The IoTKit contains:
22  *  a Cortex-M33
23  *  the IDAU
24  *  some timers and watchdogs
25  *  two peripheral protection controllers
26  *  a memory protection controller
27  *  a security controller
28  *  a bus fabric which arranges that some parts of the address
29  *  space are secure and non-secure aliases of each other
30  * The SSE-200 additionally contains:
31  *  a second Cortex-M33
32  *  two Message Handling Units (MHUs)
33  *  an optional CryptoCell (which we do not model)
34  *  more SRAM banks with associated MPCs
35  *  multiple Power Policy Units (PPUs)
36  *  a control interface for an icache for each CPU
37  *  per-CPU identity and control register blocks
38  *
39  * QEMU interface:
40  *  + Clock input "MAINCLK": clock for CPUs and most peripherals
41  *  + Clock input "S32KCLK": slow 32KHz clock used for a few peripherals
42  *  + QOM property "memory" is a MemoryRegion containing the devices provided
43  *    by the board model.
44  *  + QOM property "EXP_NUMIRQ" sets the number of expansion interrupts.
45  *    (In hardware, the SSE-200 permits the number of expansion interrupts
46  *    for the two CPUs to be configured separately, but we restrict it to
47  *    being the same for both, to avoid having to have separate Property
48  *    lists for different variants. This restriction can be relaxed later
49  *    if necessary.)
50  *  + QOM property "SRAM_ADDR_WIDTH" sets the number of bits used for the
51  *    address of each SRAM bank (and thus the total amount of internal SRAM)
52  *  + QOM property "init-svtor" sets the initial value of the CPU SVTOR register
53  *    (where it expects to load the PC and SP from the vector table on reset)
54  *  + QOM properties "CPU0_FPU", "CPU0_DSP", "CPU1_FPU" and "CPU1_DSP" which
55  *    set whether the CPUs have the FPU and DSP features present. The default
56  *    (matching the hardware) is that for CPU0 in an IoTKit and CPU1 in an
57  *    SSE-200 both are present; CPU0 in an SSE-200 has neither.
58  *    Since the IoTKit has only one CPU, it does not have the CPU1_* properties.
59  *  + Named GPIO inputs "EXP_IRQ" 0..n are the expansion interrupts for CPU 0,
60  *    which are wired to its NVIC lines 32 .. n+32
61  *  + Named GPIO inputs "EXP_CPU1_IRQ" 0..n are the expansion interrupts for
62  *    CPU 1, which are wired to its NVIC lines 32 .. n+32
63  *  + sysbus MMIO region 0 is the "AHB Slave Expansion" which allows
64  *    bus master devices in the board model to make transactions into
65  *    all the devices and memory areas in the IoTKit
66  * Controlling up to 4 AHB expansion PPBs which a system using the IoTKit
67  * might provide:
68  *  + named GPIO outputs apb_ppcexp{0,1,2,3}_nonsec[0..15]
69  *  + named GPIO outputs apb_ppcexp{0,1,2,3}_ap[0..15]
70  *  + named GPIO outputs apb_ppcexp{0,1,2,3}_irq_enable
71  *  + named GPIO outputs apb_ppcexp{0,1,2,3}_irq_clear
72  *  + named GPIO inputs apb_ppcexp{0,1,2,3}_irq_status
73  * Controlling each of the 4 expansion AHB PPCs which a system using the IoTKit
74  * might provide:
75  *  + named GPIO outputs ahb_ppcexp{0,1,2,3}_nonsec[0..15]
76  *  + named GPIO outputs ahb_ppcexp{0,1,2,3}_ap[0..15]
77  *  + named GPIO outputs ahb_ppcexp{0,1,2,3}_irq_enable
78  *  + named GPIO outputs ahb_ppcexp{0,1,2,3}_irq_clear
79  *  + named GPIO inputs ahb_ppcexp{0,1,2,3}_irq_status
80  * Controlling each of the 16 expansion MPCs which a system using the IoTKit
81  * might provide:
82  *  + named GPIO inputs mpcexp_status[0..15]
83  * Controlling each of the 16 expansion MSCs which a system using the IoTKit
84  * might provide:
85  *  + named GPIO inputs mscexp_status[0..15]
86  *  + named GPIO outputs mscexp_clear[0..15]
87  *  + named GPIO outputs mscexp_ns[0..15]
88  */
89 
90 #ifndef ARMSSE_H
91 #define ARMSSE_H
92 
93 #include "hw/sysbus.h"
94 #include "hw/arm/armv7m.h"
95 #include "hw/misc/iotkit-secctl.h"
96 #include "hw/misc/tz-ppc.h"
97 #include "hw/misc/tz-mpc.h"
98 #include "hw/timer/cmsdk-apb-timer.h"
99 #include "hw/timer/cmsdk-apb-dualtimer.h"
100 #include "hw/timer/sse-counter.h"
101 #include "hw/timer/sse-timer.h"
102 #include "hw/watchdog/cmsdk-apb-watchdog.h"
103 #include "hw/misc/iotkit-sysctl.h"
104 #include "hw/misc/iotkit-sysinfo.h"
105 #include "hw/misc/armsse-cpuid.h"
106 #include "hw/misc/armsse-mhu.h"
107 #include "hw/misc/armsse-cpu-pwrctrl.h"
108 #include "hw/misc/unimp.h"
109 #include "hw/or-irq.h"
110 #include "hw/clock.h"
111 #include "hw/core/split-irq.h"
112 #include "hw/cpu/cluster.h"
113 #include "qom/object.h"
114 
115 #define TYPE_ARM_SSE "arm-sse"
116 OBJECT_DECLARE_TYPE(ARMSSE, ARMSSEClass,
117                     ARM_SSE)
118 
119 /*
120  * These type names are for specific IoTKit subsystems; other than
121  * instantiating them, code using these devices should always handle
122  * them via the ARMSSE base class, so they have no IOTKIT() etc macros.
123  */
124 #define TYPE_IOTKIT "iotkit"
125 #define TYPE_SSE200 "sse-200"
126 #define TYPE_SSE300 "sse-300"
127 
128 /* We have an IRQ splitter and an OR gate input for each external PPC
129  * and the 2 internal PPCs
130  */
131 #define NUM_INTERNAL_PPCS 2
132 #define NUM_EXTERNAL_PPCS (IOTS_NUM_AHB_EXP_PPC + IOTS_NUM_APB_EXP_PPC)
133 #define NUM_PPCS (NUM_EXTERNAL_PPCS + NUM_INTERNAL_PPCS)
134 
135 #define MAX_SRAM_BANKS 4
136 #if MAX_SRAM_BANKS > IOTS_NUM_MPC
137 #error Too many SRAM banks
138 #endif
139 
140 #define SSE_MAX_CPUS 2
141 
142 #define NUM_PPUS 8
143 
144 /* Number of CPU IRQs used by the SSE itself */
145 #define NUM_SSE_IRQS 32
146 
147 struct ARMSSE {
148     /*< private >*/
149     SysBusDevice parent_obj;
150 
151     /*< public >*/
152     ARMv7MState armv7m[SSE_MAX_CPUS];
153     CPUClusterState cluster[SSE_MAX_CPUS];
154     IoTKitSecCtl secctl;
155     TZPPC apb_ppc[NUM_INTERNAL_PPCS];
156     TZMPC mpc[IOTS_NUM_MPC];
157     CMSDKAPBTimer timer[3];
158     OrIRQState ppc_irq_orgate;
159     SplitIRQ sec_resp_splitter;
160     SplitIRQ ppc_irq_splitter[NUM_PPCS];
161     SplitIRQ mpc_irq_splitter[IOTS_NUM_EXP_MPC + IOTS_NUM_MPC];
162     OrIRQState mpc_irq_orgate;
163     OrIRQState nmi_orgate;
164 
165     SplitIRQ cpu_irq_splitter[NUM_SSE_IRQS];
166 
167     CMSDKAPBDualTimer dualtimer;
168 
169     CMSDKAPBWatchdog cmsdk_watchdog[3];
170 
171     SSECounter sse_counter;
172     SSETimer sse_timer[4];
173 
174     IoTKitSysCtl sysctl;
175     IoTKitSysCtl sysinfo;
176 
177     ARMSSEMHU mhu[2];
178     UnimplementedDeviceState unimp[NUM_PPUS];
179     UnimplementedDeviceState cachectrl[SSE_MAX_CPUS];
180     UnimplementedDeviceState cpusecctrl[SSE_MAX_CPUS];
181 
182     ARMSSECPUID cpuid[SSE_MAX_CPUS];
183 
184     ARMSSECPUPwrCtrl cpu_pwrctrl[SSE_MAX_CPUS];
185 
186     /*
187      * 'container' holds all devices seen by all CPUs.
188      * 'cpu_container[i]' is the view that CPU i has: this has the
189      * per-CPU devices of that CPU, plus as the background 'container'
190      * (or an alias of it, since we can only use it directly once).
191      * container_alias[i] is the alias of 'container' used by CPU i+1;
192      * CPU 0 can use 'container' directly.
193      */
194     MemoryRegion container;
195     MemoryRegion container_alias[SSE_MAX_CPUS - 1];
196     MemoryRegion cpu_container[SSE_MAX_CPUS];
197     MemoryRegion alias1;
198     MemoryRegion alias2;
199     MemoryRegion alias3[SSE_MAX_CPUS];
200     MemoryRegion sram[MAX_SRAM_BANKS];
201     MemoryRegion itcm;
202     MemoryRegion dtcm;
203 
204     qemu_irq *exp_irqs[SSE_MAX_CPUS];
205     qemu_irq ppc0_irq;
206     qemu_irq ppc1_irq;
207     qemu_irq sec_resp_cfg;
208     qemu_irq sec_resp_cfg_in;
209     qemu_irq nsc_cfg_in;
210 
211     qemu_irq irq_status_in[NUM_EXTERNAL_PPCS];
212     qemu_irq mpcexp_status_in[IOTS_NUM_EXP_MPC];
213 
214     uint32_t nsccfg;
215 
216     Clock *mainclk;
217     Clock *s32kclk;
218 
219     /* Properties */
220     MemoryRegion *board_memory;
221     uint32_t exp_numirq;
222     uint32_t sram_addr_width;
223     uint32_t init_svtor;
224     bool cpu_fpu[SSE_MAX_CPUS];
225     bool cpu_dsp[SSE_MAX_CPUS];
226 };
227 
228 typedef struct ARMSSEInfo ARMSSEInfo;
229 
230 struct ARMSSEClass {
231     SysBusDeviceClass parent_class;
232     const ARMSSEInfo *info;
233 };
234 
235 
236 #endif
237