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