LXR qemu/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 "qapi/error.h"
  14#include "cpu.h"
  15#include "ui/console.h"
  16#include "hw/boards.h"
  17#include "hw/loader.h"
  18#include "hw/i386/pc.h"
  19#include "sysemu/qtest.h"
  20
  21#undef DEBUG_PUV3
  22#include "hw/unicore32/puv3.h"
  23#include "hw/input/i8042.h"
  24
  25#define KERNEL_LOAD_ADDR        0x03000000
  26#define KERNEL_MAX_SIZE         0x00800000 /* Just a guess */
  27
  28/* PKUnity System bus (AHB): 0xc0000000 - 0xedffffff (640MB) */
  29#define PUV3_DMA_BASE           (0xc0200000) /* AHB-4 */
  30
  31/* PKUnity Peripheral bus (APB): 0xee000000 - 0xefffffff (128MB) */
  32#define PUV3_GPIO_BASE          (0xee500000) /* APB-5 */
  33#define PUV3_INTC_BASE          (0xee600000) /* APB-6 */
  34#define PUV3_OST_BASE           (0xee800000) /* APB-8 */
  35#define PUV3_PM_BASE            (0xeea00000) /* APB-10 */
  36#define PUV3_PS2_BASE           (0xeeb00000) /* APB-11 */
  37
  38static void puv3_intc_cpu_handler(void *opaque, int irq, int level)
  39{
  40    UniCore32CPU *cpu = opaque;
  41    CPUState *cs = CPU(cpu);
  42
  43    assert(irq == 0);
  44    if (level) {
  45        cpu_interrupt(cs, CPU_INTERRUPT_HARD);
  46    } else {
  47        cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
  48    }
  49}
  50
  51static void puv3_soc_init(CPUUniCore32State *env)
  52{
  53    qemu_irq cpu_intc, irqs[PUV3_IRQS_NR];
  54    DeviceState *dev;
  55    MemoryRegion *i8042 = g_new(MemoryRegion, 1);
  56    int i;
  57
  58    /* Initialize interrupt controller */
  59    cpu_intc = qemu_allocate_irq(puv3_intc_cpu_handler,
  60                                 uc32_env_get_cpu(env), 0);
  61    dev = sysbus_create_simple("puv3_intc", PUV3_INTC_BASE, cpu_intc);
  62    for (i = 0; i < PUV3_IRQS_NR; i++) {
  63        irqs[i] = qdev_get_gpio_in(dev, i);
  64    }
  65
  66    /* Initialize minimal necessary devices for kernel booting */
  67    sysbus_create_simple("puv3_pm", PUV3_PM_BASE, NULL);
  68    sysbus_create_simple("puv3_dma", PUV3_DMA_BASE, NULL);
  69    sysbus_create_simple("puv3_ost", PUV3_OST_BASE, irqs[PUV3_IRQS_OST0]);
  70    sysbus_create_varargs("puv3_gpio", PUV3_GPIO_BASE,
  71            irqs[PUV3_IRQS_GPIOLOW0], irqs[PUV3_IRQS_GPIOLOW1],
  72            irqs[PUV3_IRQS_GPIOLOW2], irqs[PUV3_IRQS_GPIOLOW3],
  73            irqs[PUV3_IRQS_GPIOLOW4], irqs[PUV3_IRQS_GPIOLOW5],
  74            irqs[PUV3_IRQS_GPIOLOW6], irqs[PUV3_IRQS_GPIOLOW7],
  75            irqs[PUV3_IRQS_GPIOHIGH], NULL);
  76
  77    /* Keyboard (i8042), mouse disabled for nographic */
  78    i8042_mm_init(irqs[PUV3_IRQS_PS2_KBD], NULL, i8042, PUV3_REGS_OFFSET, 4);
  79    memory_region_add_subregion(get_system_memory(), PUV3_PS2_BASE, i8042);
  80}
  81
  82static void puv3_board_init(CPUUniCore32State *env, ram_addr_t ram_size)
  83{
  84    MemoryRegion *ram_memory = g_new(MemoryRegion, 1);
  85
  86    /* SDRAM at address zero.  */
  87    memory_region_init_ram(ram_memory, NULL, "puv3.ram", ram_size,
  88                           &error_fatal);
  89    memory_region_add_subregion(get_system_memory(), 0, ram_memory);
  90}
  91
  92static const GraphicHwOps no_ops;
  93
  94static void puv3_load_kernel(const char *kernel_filename)
  95{
  96    int size;
  97
  98    if (kernel_filename == NULL && qtest_enabled()) {
  99        return;
 100    }
 101    if (kernel_filename == NULL) {
 102        error_report("kernel parameter cannot be empty");
 103        exit(1);
 104    }
 105
 106    /* only zImage format supported */
 107    size = load_image_targphys(kernel_filename, KERNEL_LOAD_ADDR,
 108            KERNEL_MAX_SIZE);
 109    if (size < 0) {
 110        error_report("Load kernel error: '%s'", kernel_filename);
 111        exit(1);
 112    }
 113
 114    /* cheat curses that we have a graphic console, only under ocd console */
 115    graphic_console_init(NULL, 0, &no_ops, NULL);
 116}
 117
 118static void puv3_init(MachineState *machine)
 119{
 120    ram_addr_t ram_size = machine->ram_size;
 121    const char *kernel_filename = machine->kernel_filename;
 122    const char *initrd_filename = machine->initrd_filename;
 123    CPUUniCore32State *env;
 124    UniCore32CPU *cpu;
 125
 126    if (initrd_filename) {
 127        error_report("Please use kernel built-in initramdisk");
 128        exit(1);
 129    }
 130
 131    cpu = UNICORE32_CPU(cpu_create(machine->cpu_type));
 132    env = &cpu->env;
 133
 134    puv3_soc_init(env);
 135    puv3_board_init(env, ram_size);
 136    puv3_load_kernel(kernel_filename);
 137}
 138
 139static void puv3_machine_init(MachineClass *mc)
 140{
 141    mc->desc = "PKUnity Version-3 based on UniCore32";
 142    mc->init = puv3_init;
 143    mc->is_default = 1;
 144    mc->default_cpu_type = UNICORE32_CPU_TYPE_NAME("UniCore-II");
 145}
 146
 147DEFINE_MACHINE("puv3", puv3_machine_init)
 148