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