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 "qemu-common.h"
  15 #include "cpu.h"
  16 #include "ui/console.h"
  17 #include "elf.h"
  18 #include "exec/address-spaces.h"
  19 #include "hw/sysbus.h"
  20 #include "hw/boards.h"
  21 #include "hw/loader.h"
  22 #include "hw/i386/pc.h"
  23 #include "qemu/error-report.h"
  24 #include "sysemu/qtest.h"
  25
  26 #undef DEBUG_PUV3
  27 #include "hw/unicore32/puv3.h"
  28
  29 #define KERNEL_LOAD_ADDR        0x03000000
  30 #define KERNEL_MAX_SIZE         0x00800000 /* Just a guess */
  31
  32 static void puv3_intc_cpu_handler(void *opaque, int irq, int level)
  33 {
  34     UniCore32CPU *cpu = opaque;
  35     CPUState *cs = CPU(cpu);
  36
  37     assert(irq == 0);
  38     if (level) {
  39         cpu_interrupt(cs, CPU_INTERRUPT_HARD);
  40     } else {
  41         cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
  42     }
  43 }
  44
  45 static void puv3_soc_init(CPUUniCore32State *env)
  46 {
  47     qemu_irq cpu_intc, irqs[PUV3_IRQS_NR];
  48     DeviceState *dev;
  49     MemoryRegion *i8042 = g_new(MemoryRegion, 1);
  50     int i;
  51
  52     /* Initialize interrupt controller */
  53     cpu_intc = qemu_allocate_irq(puv3_intc_cpu_handler,
  54                                  uc32_env_get_cpu(env), 0);
  55     dev = sysbus_create_simple("puv3_intc", PUV3_INTC_BASE, cpu_intc);
  56     for (i = 0; i < PUV3_IRQS_NR; i++) {
  57         irqs[i] = qdev_get_gpio_in(dev, i);
  58     }
  59
  60     /* Initialize minimal necessary devices for kernel booting */
  61     sysbus_create_simple("puv3_pm", PUV3_PM_BASE, NULL);
  62     sysbus_create_simple("puv3_dma", PUV3_DMA_BASE, NULL);
  63     sysbus_create_simple("puv3_ost", PUV3_OST_BASE, irqs[PUV3_IRQS_OST0]);
  64     sysbus_create_varargs("puv3_gpio", PUV3_GPIO_BASE,
  65             irqs[PUV3_IRQS_GPIOLOW0], irqs[PUV3_IRQS_GPIOLOW1],
  66             irqs[PUV3_IRQS_GPIOLOW2], irqs[PUV3_IRQS_GPIOLOW3],
  67             irqs[PUV3_IRQS_GPIOLOW4], irqs[PUV3_IRQS_GPIOLOW5],
  68             irqs[PUV3_IRQS_GPIOLOW6], irqs[PUV3_IRQS_GPIOLOW7],
  69             irqs[PUV3_IRQS_GPIOHIGH], NULL);
  70
  71     /* Keyboard (i8042), mouse disabled for nographic */
  72     i8042_mm_init(irqs[PUV3_IRQS_PS2_KBD], NULL, i8042, PUV3_REGS_OFFSET, 4);
  73     memory_region_add_subregion(get_system_memory(), PUV3_PS2_BASE, i8042);
  74 }
  75
  76 static void puv3_board_init(CPUUniCore32State *env, ram_addr_t ram_size)
  77 {
  78     MemoryRegion *ram_memory = g_new(MemoryRegion, 1);
  79
  80     /* SDRAM at address zero.  */
  81     memory_region_init_ram(ram_memory, NULL, "puv3.ram", ram_size,
  82                            &error_fatal);
  83     memory_region_add_subregion(get_system_memory(), 0, ram_memory);
  84 }
  85
  86 static const GraphicHwOps no_ops;
  87
  88 static void puv3_load_kernel(const char *kernel_filename)
  89 {
  90     int size;
  91
  92     if (kernel_filename == NULL && qtest_enabled()) {
  93         return;
  94     }
  95     if (kernel_filename == NULL) {
  96         error_report("kernel parameter cannot be empty");
  97         exit(1);
  98     }
  99
 100     /* only zImage format supported */
 101     size = load_image_targphys(kernel_filename, KERNEL_LOAD_ADDR,
 102             KERNEL_MAX_SIZE);
 103     if (size < 0) {
 104         error_report("Load kernel error: '%s'", kernel_filename);
 105         exit(1);
 106     }
 107
 108     /* cheat curses that we have a graphic console, only under ocd console */
 109     graphic_console_init(NULL, 0, &no_ops, NULL);
 110 }
 111
 112 static void puv3_init(MachineState *machine)
 113 {
 114     ram_addr_t ram_size = machine->ram_size;
 115     const char *cpu_model = machine->cpu_model;
 116     const char *kernel_filename = machine->kernel_filename;
 117     const char *initrd_filename = machine->initrd_filename;
 118     CPUUniCore32State *env;
 119     UniCore32CPU *cpu;
 120
 121     if (initrd_filename) {
 122         error_report("Please use kernel built-in initramdisk");
 123         exit(1);
 124     }
 125
 126     if (!cpu_model) {
 127         cpu_model = "UniCore-II";
 128     }
 129
 130     cpu = UNICORE32_CPU(cpu_generic_init(TYPE_UNICORE32_CPU, cpu_model));
 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
 138 static 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 }
 144
 145 DEFINE_MACHINE("puv3", puv3_machine_init)