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 #include "hw/irq.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
  38 static 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
  51 static 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                                  env_archcpu(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
  82 static 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
  92 static const GraphicHwOps no_ops;
  93
  94 static 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
 118 static 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
 139 static 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
 147 DEFINE_MACHINE("puv3", puv3_machine_init)