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
mpc8544_guts_read(void * opaque,hwaddr addr,unsigned size)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
mpc8544_guts_write(void * opaque,hwaddr addr,uint64_t value,unsigned size)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
mpc8544_guts_initfn(Object * obj)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
mpc8544_guts_register_types(void)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