LXR qemu/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
  25static 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
  37static 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
  67static 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
  77static 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
  94static void puv3_init(ram_addr_t ram_size, const char *boot_device,
  95                     const char *kernel_filename, const char *kernel_cmdline,
  96                     const char *initrd_filename, const char *cpu_model)
  97{
  98    CPUUniCore32State *env;
  99
 100    if (initrd_filename) {
 101        hw_error("Please use kernel built-in initramdisk.\n");
 102    }
 103
 104    if (!cpu_model) {
 105        cpu_model = "UniCore-II";
 106    }
 107
 108    env = cpu_init(cpu_model);
 109    if (!env) {
 110        hw_error("Unable to find CPU definition\n");
 111    }
 112
 113    puv3_soc_init(env);
 114    puv3_board_init(env, ram_size);
 115    puv3_load_kernel(kernel_filename);
 116}
 117
 118static QEMUMachine puv3_machine = {
 119    .name = "puv3",
 120    .desc = "PKUnity Version-3 based on UniCore32",
 121    .init = puv3_init,
 122    .is_default = 1,
 123    .use_scsi = 0,
 124};
 125
 126static void puv3_machine_init(void)
 127{
 128    qemu_register_machine(&puv3_machine);
 129}
 130
 131machine_init(puv3_machine_init)
 132