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-common.h"
  13 #include "ui/console.h"
  14 #include "elf.h"
  15 #include "exec/address-spaces.h"
  16 #include "hw/sysbus.h"
  17 #include "hw/boards.h"
  18 #include "hw/loader.h"
  19 #include "hw/i386/pc.h"
  20
  21 #undef DEBUG_PUV3
  22 #include "hw/unicore32/puv3.h"
  23
  24 #define KERNEL_LOAD_ADDR        0x03000000
  25 #define KERNEL_MAX_SIZE         0x00800000 /* Just a guess */
  26
  27 static void puv3_intc_cpu_handler(void *opaque, int irq, int level)
  28 {
  29     UniCore32CPU *cpu = opaque;
  30     CPUState *cs = CPU(cpu);
  31
  32     assert(irq == 0);
  33     if (level) {
  34         cpu_interrupt(cs, CPU_INTERRUPT_HARD);
  35     } else {
  36         cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
  37     }
  38 }
  39
  40 static void puv3_soc_init(CPUUniCore32State *env)
  41 {
  42     qemu_irq *cpu_intc, irqs[PUV3_IRQS_NR];
  43     DeviceState *dev;
  44     MemoryRegion *i8042 = g_new(MemoryRegion, 1);
  45     int i;
  46
  47     /* Initialize interrupt controller */
  48     cpu_intc = qemu_allocate_irqs(puv3_intc_cpu_handler,
  49                                   uc32_env_get_cpu(env), 1);
  50     dev = sysbus_create_simple("puv3_intc", PUV3_INTC_BASE, *cpu_intc);
  51     for (i = 0; i < PUV3_IRQS_NR; i++) {
  52         irqs[i] = qdev_get_gpio_in(dev, i);
  53     }
  54
  55     /* Initialize minimal necessary devices for kernel booting */
  56     sysbus_create_simple("puv3_pm", PUV3_PM_BASE, NULL);
  57     sysbus_create_simple("puv3_dma", PUV3_DMA_BASE, NULL);
  58     sysbus_create_simple("puv3_ost", PUV3_OST_BASE, irqs[PUV3_IRQS_OST0]);
  59     sysbus_create_varargs("puv3_gpio", PUV3_GPIO_BASE,
  60             irqs[PUV3_IRQS_GPIOLOW0], irqs[PUV3_IRQS_GPIOLOW1],
  61             irqs[PUV3_IRQS_GPIOLOW2], irqs[PUV3_IRQS_GPIOLOW3],
  62             irqs[PUV3_IRQS_GPIOLOW4], irqs[PUV3_IRQS_GPIOLOW5],
  63             irqs[PUV3_IRQS_GPIOLOW6], irqs[PUV3_IRQS_GPIOLOW7],
  64             irqs[PUV3_IRQS_GPIOHIGH], NULL);
  65
  66     /* Keyboard (i8042), mouse disabled for nographic */
  67     i8042_mm_init(irqs[PUV3_IRQS_PS2_KBD], NULL, i8042, PUV3_REGS_OFFSET, 4);
  68     memory_region_add_subregion(get_system_memory(), PUV3_PS2_BASE, i8042);
  69 }
  70
  71 static void puv3_board_init(CPUUniCore32State *env, ram_addr_t ram_size)
  72 {
  73     MemoryRegion *ram_memory = g_new(MemoryRegion, 1);
  74
  75     /* SDRAM at address zero.  */
  76     memory_region_init_ram(ram_memory, NULL, "puv3.ram", ram_size);
  77     vmstate_register_ram_global(ram_memory);
  78     memory_region_add_subregion(get_system_memory(), 0, ram_memory);
  79 }
  80
  81 static const GraphicHwOps no_ops;
  82
  83 static void puv3_load_kernel(const char *kernel_filename)
  84 {
  85     int size;
  86
  87     assert(kernel_filename != NULL);
  88
  89     /* only zImage format supported */
  90     size = load_image_targphys(kernel_filename, KERNEL_LOAD_ADDR,
  91             KERNEL_MAX_SIZE);
  92     if (size < 0) {
  93         hw_error("Load kernel error: '%s'\n", kernel_filename);
  94     }
  95
  96     /* cheat curses that we have a graphic console, only under ocd console */
  97     graphic_console_init(NULL, &no_ops, NULL);
  98 }
  99
 100 static void puv3_init(QEMUMachineInitArgs *args)
 101 {
 102     ram_addr_t ram_size = args->ram_size;
 103     const char *cpu_model = args->cpu_model;
 104     const char *kernel_filename = args->kernel_filename;
 105     const char *initrd_filename = args->initrd_filename;
 106     CPUUniCore32State *env;
 107
 108     if (initrd_filename) {
 109         hw_error("Please use kernel built-in initramdisk.\n");
 110     }
 111
 112     if (!cpu_model) {
 113         cpu_model = "UniCore-II";
 114     }
 115
 116     env = cpu_init(cpu_model);
 117     if (!env) {
 118         hw_error("Unable to find CPU definition\n");
 119     }
 120
 121     puv3_soc_init(env);
 122     puv3_board_init(env, ram_size);
 123     puv3_load_kernel(kernel_filename);
 124 }
 125
 126 static QEMUMachine puv3_machine = {
 127     .name = "puv3",
 128     .desc = "PKUnity Version-3 based on UniCore32",
 129     .init = puv3_init,
 130     .is_default = 1,
 131     DEFAULT_MACHINE_OPTIONS,
 132 };
 133
 134 static void puv3_machine_init(void)
 135 {
 136     qemu_register_machine(&puv3_machine);
 137 }
 138
 139 machine_init(puv3_machine_init)