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 "sysemu/runstate.h" 23 #include "cpu.h" 24 #include "hw/sysbus.h" 25 #include "qom/object.h" 26 27 #define MPC8544_GUTS_MMIO_SIZE 0x1000 28 #define MPC8544_GUTS_RSTCR_RESET 0x02 29 30 #define MPC8544_GUTS_ADDR_PORPLLSR 0x00 31 #define MPC8544_GUTS_ADDR_PORBMSR 0x04 32 #define MPC8544_GUTS_ADDR_PORIMPSCR 0x08 33 #define MPC8544_GUTS_ADDR_PORDEVSR 0x0C 34 #define MPC8544_GUTS_ADDR_PORDBGMSR 0x10 35 #define MPC8544_GUTS_ADDR_PORDEVSR2 0x14 36 #define MPC8544_GUTS_ADDR_GPPORCR 0x20 37 #define MPC8544_GUTS_ADDR_GPIOCR 0x30 38 #define MPC8544_GUTS_ADDR_GPOUTDR 0x40 39 #define MPC8544_GUTS_ADDR_GPINDR 0x50 40 #define MPC8544_GUTS_ADDR_PMUXCR 0x60 41 #define MPC8544_GUTS_ADDR_DEVDISR 0x70 42 #define MPC8544_GUTS_ADDR_POWMGTCSR 0x80 43 #define MPC8544_GUTS_ADDR_MCPSUMR 0x90 44 #define MPC8544_GUTS_ADDR_RSTRSCR 0x94 45 #define MPC8544_GUTS_ADDR_PVR 0xA0 46 #define MPC8544_GUTS_ADDR_SVR 0xA4 47 #define MPC8544_GUTS_ADDR_RSTCR 0xB0 48 #define MPC8544_GUTS_ADDR_IOVSELSR 0xC0 49 #define MPC8544_GUTS_ADDR_DDRCSR 0xB20 50 #define MPC8544_GUTS_ADDR_DDRCDR 0xB24 51 #define MPC8544_GUTS_ADDR_DDRCLKDR 0xB28 52 #define MPC8544_GUTS_ADDR_CLKOCR 0xE00 53 #define MPC8544_GUTS_ADDR_SRDS1CR1 0xF04 54 #define MPC8544_GUTS_ADDR_SRDS2CR1 0xF10 55 #define MPC8544_GUTS_ADDR_SRDS2CR3 0xF18 56 57 #define TYPE_MPC8544_GUTS "mpc8544-guts" 58 typedef struct GutsState GutsState; 59 DECLARE_INSTANCE_CHECKER(GutsState, MPC8544_GUTS, 60 TYPE_MPC8544_GUTS) 61 62 struct GutsState { 63 /*< private >*/ 64 SysBusDevice parent_obj; 65 /*< public >*/ 66 67 MemoryRegion iomem; 68 }; 69 70 71 static uint64_t mpc8544_guts_read(void *opaque, hwaddr addr, 72 unsigned size) 73 { 74 uint32_t value = 0; 75 PowerPCCPU *cpu = POWERPC_CPU(current_cpu); 76 CPUPPCState *env = &cpu->env; 77 78 addr &= MPC8544_GUTS_MMIO_SIZE - 1; 79 switch (addr) { 80 case MPC8544_GUTS_ADDR_PVR: 81 value = env->spr[SPR_PVR]; 82 break; 83 case MPC8544_GUTS_ADDR_SVR: 84 value = env->spr[SPR_E500_SVR]; 85 break; 86 default: 87 fprintf(stderr, "guts: Unknown register read: %x\n", (int)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 fprintf(stderr, "guts: Unknown register write: %x = %x\n", 107 (int)addr, (unsigned)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