hw/unicore32/puv3.c

   1 /*
   2  * Generic PKUnity SoC machine and board descriptor
   3  *
   4  * Copyright (C) 2010-2012 Guan Xuetao
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation, or any later version.
   9  * See the COPYING file in the top-level directory.
  10  */
  11
  12 #include "qemu/osdep.h"
  13 #include "qemu-common.h"
  14 #include "ui/console.h"
  15 #include "elf.h"
  16 #include "exec/address-spaces.h"
  17 #include "hw/sysbus.h"
  18 #include "hw/boards.h"
  19 #include "hw/loader.h"
  20 #include "hw/i386/pc.h"
  21 #include "qemu/error-report.h"
  22 #include "sysemu/qtest.h"
  23
  24 #undef DEBUG_PUV3
  25 #include "hw/unicore32/puv3.h"
  26
  27 #define KERNEL_LOAD_ADDR        0x03000000
  28 #define KERNEL_MAX_SIZE         0x00800000 /* Just a guess */
  29
  30 static void puv3_intc_cpu_handler(void *opaque, int irq, int level)
  31 {
  32     UniCore32CPU *cpu = opaque;
  33     CPUState *cs = CPU(cpu);
  34
  35     assert(irq == 0);
  36     if (level) {
  37         cpu_interrupt(cs, CPU_INTERRUPT_HARD);
  38     } else {
  39         cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
  40     }
  41 }
  42
  43 static void puv3_soc_init(CPUUniCore32State *env)
  44 {
  45     qemu_irq cpu_intc, irqs[PUV3_IRQS_NR];
  46     DeviceState *dev;
  47     MemoryRegion *i8042 = g_new(MemoryRegion, 1);
  48     int i;
  49
  50     /* Initialize interrupt controller */
  51     cpu_intc = qemu_allocate_irq(puv3_intc_cpu_handler,
  52                                  uc32_env_get_cpu(env), 0);
  53     dev = sysbus_create_simple("puv3_intc", PUV3_INTC_BASE, cpu_intc);
  54     for (i = 0; i < PUV3_IRQS_NR; i++) {
  55         irqs[i] = qdev_get_gpio_in(dev, i);
  56     }
  57
  58     /* Initialize minimal necessary devices for kernel booting */
  59     sysbus_create_simple("puv3_pm", PUV3_PM_BASE, NULL);
  60     sysbus_create_simple("puv3_dma", PUV3_DMA_BASE, NULL);
  61     sysbus_create_simple("puv3_ost", PUV3_OST_BASE, irqs[PUV3_IRQS_OST0]);
  62     sysbus_create_varargs("puv3_gpio", PUV3_GPIO_BASE,
  63             irqs[PUV3_IRQS_GPIOLOW0], irqs[PUV3_IRQS_GPIOLOW1],
  64             irqs[PUV3_IRQS_GPIOLOW2], irqs[PUV3_IRQS_GPIOLOW3],
  65             irqs[PUV3_IRQS_GPIOLOW4], irqs[PUV3_IRQS_GPIOLOW5],
  66             irqs[PUV3_IRQS_GPIOLOW6], irqs[PUV3_IRQS_GPIOLOW7],
  67             irqs[PUV3_IRQS_GPIOHIGH], NULL);
  68
  69     /* Keyboard (i8042), mouse disabled for nographic */
  70     i8042_mm_init(irqs[PUV3_IRQS_PS2_KBD], NULL, i8042, PUV3_REGS_OFFSET, 4);
  71     memory_region_add_subregion(get_system_memory(), PUV3_PS2_BASE, i8042);
  72 }
  73
  74 static void puv3_board_init(CPUUniCore32State *env, ram_addr_t ram_size)
  75 {
  76     MemoryRegion *ram_memory = g_new(MemoryRegion, 1);
  77
  78     /* SDRAM at address zero.  */
  79     memory_region_init_ram(ram_memory, NULL, "puv3.ram", ram_size,
  80                            &error_fatal);
  81     vmstate_register_ram_global(ram_memory);
  82     memory_region_add_subregion(get_system_memory(), 0, ram_memory);
  83 }
  84
  85 static const GraphicHwOps no_ops;
  86
  87 static void puv3_load_kernel(const char *kernel_filename)
  88 {
  89     int size;
  90
  91     if (kernel_filename == NULL && qtest_enabled()) {
  92         return;
  93     }
  94     assert(kernel_filename != NULL);
  95
  96     /* only zImage format supported */
  97     size = load_image_targphys(kernel_filename, KERNEL_LOAD_ADDR,
  98             KERNEL_MAX_SIZE);
  99     if (size < 0) {
 100         error_report("Load kernel error: '%s'", kernel_filename);
 101         exit(1);
 102     }
 103
 104     /* cheat curses that we have a graphic console, only under ocd console */
 105     graphic_console_init(NULL, 0, &no_ops, NULL);
 106 }
 107
 108 static void puv3_init(MachineState *machine)
 109 {
 110     ram_addr_t ram_size = machine->ram_size;
 111     const char *cpu_model = machine->cpu_model;
 112     const char *kernel_filename = machine->kernel_filename;
 113     const char *initrd_filename = machine->initrd_filename;
 114     CPUUniCore32State *env;
 115     UniCore32CPU *cpu;
 116
 117     if (initrd_filename) {
 118         error_report("Please use kernel built-in initramdisk");
 119         exit(1);
 120     }
 121
 122     if (!cpu_model) {
 123         cpu_model = "UniCore-II";
 124     }
 125
 126     cpu = uc32_cpu_init(cpu_model);
 127     if (!cpu) {
 128         error_report("Unable to find CPU definition");
 129         exit(1);
 130     }
 131     env = &cpu->env;
 132
 133     puv3_soc_init(env);
 134     puv3_board_init(env, ram_size);
 135     puv3_load_kernel(kernel_filename);
 136 }
 137
 138 static void puv3_machine_init(MachineClass *mc)
 139 {
 140     mc->desc = "PKUnity Version-3 based on UniCore32";
 141     mc->init = puv3_init;
 142     mc->is_default = 1;
 143 }
 144
 145 DEFINE_MACHINE("puv3", puv3_machine_init)