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 "cpu.h" 23 #include "hw/hw.h" 24 #include "sysemu/sysemu.h" 25 #include "hw/sysbus.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 #define MPC8544_GUTS(obj) OBJECT_CHECK(GutsState, (obj), TYPE_MPC8544_GUTS) 59 60 struct GutsState { 61 /*< private >*/ 62 SysBusDevice parent_obj; 63 /*< public >*/ 64 65 MemoryRegion iomem; 66 }; 67 68 typedef struct GutsState GutsState; 69 70 static uint64_t mpc8544_guts_read(void *opaque, hwaddr addr, 71 unsigned size) 72 { 73 uint32_t value = 0; 74 PowerPCCPU *cpu = POWERPC_CPU(current_cpu); 75 CPUPPCState *env = &cpu->env; 76 77 addr &= MPC8544_GUTS_MMIO_SIZE - 1; 78 switch (addr) { 79 case MPC8544_GUTS_ADDR_PVR: 80 value = env->spr[SPR_PVR]; 81 break; 82 case MPC8544_GUTS_ADDR_SVR: 83 value = env->spr[SPR_E500_SVR]; 84 break; 85 default: 86 fprintf(stderr, "guts: Unknown register read: %x\n", (int)addr); 87 break; 88 } 89 90 return value; 91 } 92 93 static void mpc8544_guts_write(void *opaque, hwaddr addr, 94 uint64_t value, unsigned size) 95 { 96 addr &= MPC8544_GUTS_MMIO_SIZE - 1; 97 98 switch (addr) { 99 case MPC8544_GUTS_ADDR_RSTCR: 100 if (value & MPC8544_GUTS_RSTCR_RESET) { 101 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); 102 } 103 break; 104 default: 105 fprintf(stderr, "guts: Unknown register write: %x = %x\n", 106 (int)addr, (unsigned)value); 107 break; 108 } 109 } 110 111 static const MemoryRegionOps mpc8544_guts_ops = { 112 .read = mpc8544_guts_read, 113 .write = mpc8544_guts_write, 114 .endianness = DEVICE_BIG_ENDIAN, 115 .valid = { 116 .min_access_size = 4, 117 .max_access_size = 4, 118 }, 119 }; 120 121 static void mpc8544_guts_initfn(Object *obj) 122 { 123 SysBusDevice *d = SYS_BUS_DEVICE(obj); 124 GutsState *s = MPC8544_GUTS(obj); 125 126 memory_region_init_io(&s->iomem, OBJECT(s), &mpc8544_guts_ops, s, 127 "mpc8544.guts", MPC8544_GUTS_MMIO_SIZE); 128 sysbus_init_mmio(d, &s->iomem); 129 } 130 131 static const TypeInfo mpc8544_guts_info = { 132 .name = TYPE_MPC8544_GUTS, 133 .parent = TYPE_SYS_BUS_DEVICE, 134 .instance_size = sizeof(GutsState), 135 .instance_init = mpc8544_guts_initfn, 136 }; 137 138 static void mpc8544_guts_register_types(void) 139 { 140 type_register_static(&mpc8544_guts_info); 141 } 142 143 type_init(mpc8544_guts_register_types) 144