xref: /openbmc/qemu/hw/ppc/mpc8544_guts.c (revision 2b74dd91)
1 /*
2  * QEMU PowerPC MPC8544 global util pseudo-device
3  *
4  * Copyright (C) 2011 Freescale Semiconductor, Inc. All rights reserved.
5  *
6  * Author: Alexander Graf, <alex@csgraf.de>
7  *
8  * This is free software; you can redistribute it and/or modify
9  * it under the terms of  the GNU General  Public License as published by
10  * the Free Software Foundation;  either version 2 of the  License, or
11  * (at your option) any later version.
12  *
13  * *****************************************************************
14  *
15  * The documentation for this device is noted in the MPC8544 documentation,
16  * file name "MPC8544ERM.pdf". You can easily find it on the web.
17  *
18  */
19 
20 #include "qemu/osdep.h"
21 #include "qemu/module.h"
22 #include "qemu/log.h"
23 #include "sysemu/runstate.h"
24 #include "cpu.h"
25 #include "hw/sysbus.h"
26 #include "qom/object.h"
27 
28 #define MPC8544_GUTS_MMIO_SIZE        0x1000
29 #define MPC8544_GUTS_RSTCR_RESET      0x02
30 
31 #define MPC8544_GUTS_ADDR_PORPLLSR    0x00
32 #define MPC8544_GUTS_ADDR_PORBMSR     0x04
33 #define MPC8544_GUTS_ADDR_PORIMPSCR   0x08
34 #define MPC8544_GUTS_ADDR_PORDEVSR    0x0C
35 #define MPC8544_GUTS_ADDR_PORDBGMSR   0x10
36 #define MPC8544_GUTS_ADDR_PORDEVSR2   0x14
37 #define MPC8544_GUTS_ADDR_GPPORCR     0x20
38 #define MPC8544_GUTS_ADDR_GPIOCR      0x30
39 #define MPC8544_GUTS_ADDR_GPOUTDR     0x40
40 #define MPC8544_GUTS_ADDR_GPINDR      0x50
41 #define MPC8544_GUTS_ADDR_PMUXCR      0x60
42 #define MPC8544_GUTS_ADDR_DEVDISR     0x70
43 #define MPC8544_GUTS_ADDR_POWMGTCSR   0x80
44 #define MPC8544_GUTS_ADDR_MCPSUMR     0x90
45 #define MPC8544_GUTS_ADDR_RSTRSCR     0x94
46 #define MPC8544_GUTS_ADDR_PVR         0xA0
47 #define MPC8544_GUTS_ADDR_SVR         0xA4
48 #define MPC8544_GUTS_ADDR_RSTCR       0xB0
49 #define MPC8544_GUTS_ADDR_IOVSELSR    0xC0
50 #define MPC8544_GUTS_ADDR_DDRCSR      0xB20
51 #define MPC8544_GUTS_ADDR_DDRCDR      0xB24
52 #define MPC8544_GUTS_ADDR_DDRCLKDR    0xB28
53 #define MPC8544_GUTS_ADDR_CLKOCR      0xE00
54 #define MPC8544_GUTS_ADDR_SRDS1CR1    0xF04
55 #define MPC8544_GUTS_ADDR_SRDS2CR1    0xF10
56 #define MPC8544_GUTS_ADDR_SRDS2CR3    0xF18
57 
58 #define TYPE_MPC8544_GUTS "mpc8544-guts"
59 OBJECT_DECLARE_SIMPLE_TYPE(GutsState, MPC8544_GUTS)
60 
61 struct GutsState {
62     /*< private >*/
63     SysBusDevice parent_obj;
64     /*< public >*/
65 
66     MemoryRegion iomem;
67 };
68 
69 
70 static uint64_t mpc8544_guts_read(void *opaque, hwaddr addr,
71                                   unsigned size)
72 {
73     uint32_t value = 0;
74     CPUPPCState *env = cpu_env(current_cpu);
75 
76     addr &= MPC8544_GUTS_MMIO_SIZE - 1;
77     switch (addr) {
78     case MPC8544_GUTS_ADDR_PVR:
79         value = env->spr[SPR_PVR];
80         break;
81     case MPC8544_GUTS_ADDR_SVR:
82         value = env->spr[SPR_E500_SVR];
83         break;
84     default:
85         qemu_log_mask(LOG_GUEST_ERROR,
86                       "%s: Unknown register 0x%" HWADDR_PRIx "\n",
87                       __func__, addr);
88         break;
89     }
90 
91     return value;
92 }
93 
94 static void mpc8544_guts_write(void *opaque, hwaddr addr,
95                                uint64_t value, unsigned size)
96 {
97     addr &= MPC8544_GUTS_MMIO_SIZE - 1;
98 
99     switch (addr) {
100     case MPC8544_GUTS_ADDR_RSTCR:
101         if (value & MPC8544_GUTS_RSTCR_RESET) {
102             qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
103         }
104         break;
105     default:
106         qemu_log_mask(LOG_GUEST_ERROR, "%s: Unknown register 0x%" HWADDR_PRIx
107                        " = 0x%" PRIx64 "\n", __func__, addr, value);
108         break;
109     }
110 }
111 
112 static const MemoryRegionOps mpc8544_guts_ops = {
113     .read = mpc8544_guts_read,
114     .write = mpc8544_guts_write,
115     .endianness = DEVICE_BIG_ENDIAN,
116     .valid = {
117         .min_access_size = 4,
118         .max_access_size = 4,
119     },
120 };
121 
122 static void mpc8544_guts_initfn(Object *obj)
123 {
124     SysBusDevice *d = SYS_BUS_DEVICE(obj);
125     GutsState *s = MPC8544_GUTS(obj);
126 
127     memory_region_init_io(&s->iomem, OBJECT(s), &mpc8544_guts_ops, s,
128                           "mpc8544.guts", MPC8544_GUTS_MMIO_SIZE);
129     sysbus_init_mmio(d, &s->iomem);
130 }
131 
132 static const TypeInfo mpc8544_guts_info = {
133     .name          = TYPE_MPC8544_GUTS,
134     .parent        = TYPE_SYS_BUS_DEVICE,
135     .instance_size = sizeof(GutsState),
136     .instance_init = mpc8544_guts_initfn,
137 };
138 
139 static void mpc8544_guts_register_types(void)
140 {
141     type_register_static(&mpc8544_guts_info);
142 }
143 
144 type_init(mpc8544_guts_register_types)
145