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