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
  25 static 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
  37 static void puv3_soc_init(CPUUniCore32State *env)
  38 {
  39     qemu_irq *cpu_intc, irqs[PUV3_IRQS_NR];
  40     DeviceState *dev;
  41     int i;
  42
  43     /* Initialize interrupt controller */
  44     cpu_intc = qemu_allocate_irqs(puv3_intc_cpu_handler, env, 1);
  45     dev = sysbus_create_simple("puv3_intc", PUV3_INTC_BASE, *cpu_intc);
  46     for (i = 0; i < PUV3_IRQS_NR; i++) {
  47         irqs[i] = qdev_get_gpio_in(dev, i);
  48     }
  49
  50     /* Initialize minimal necessary devices for kernel booting */
  51     sysbus_create_simple("puv3_ost", PUV3_OST_BASE, irqs[PUV3_IRQS_OST0]);
  52     sysbus_create_varargs("puv3_gpio", PUV3_GPIO_BASE,
  53             irqs[PUV3_IRQS_GPIOLOW0], irqs[PUV3_IRQS_GPIOLOW1],
  54             irqs[PUV3_IRQS_GPIOLOW2], irqs[PUV3_IRQS_GPIOLOW3],
  55             irqs[PUV3_IRQS_GPIOLOW4], irqs[PUV3_IRQS_GPIOLOW5],
  56             irqs[PUV3_IRQS_GPIOLOW6], irqs[PUV3_IRQS_GPIOLOW7],
  57             irqs[PUV3_IRQS_GPIOHIGH], NULL);
  58 }
  59
  60 static void puv3_board_init(CPUUniCore32State *env, ram_addr_t ram_size)
  61 {
  62     MemoryRegion *ram_memory = g_new(MemoryRegion, 1);
  63
  64     /* SDRAM at address zero.  */
  65     memory_region_init_ram(ram_memory, "puv3.ram", ram_size);
  66     vmstate_register_ram_global(ram_memory);
  67     memory_region_add_subregion(get_system_memory(), 0, ram_memory);
  68 }
  69
  70 static void puv3_load_kernel(const char *kernel_filename)
  71 {
  72     int size;
  73
  74     assert(kernel_filename != NULL);
  75
  76     /* only zImage format supported */
  77     size = load_image_targphys(kernel_filename, KERNEL_LOAD_ADDR,
  78             KERNEL_MAX_SIZE);
  79     if (size < 0) {
  80         hw_error("Load kernel error: '%s'\n", kernel_filename);
  81     }
  82
  83     /* cheat curses that we have a graphic console, only under ocd console */
  84     graphic_console_init(NULL, NULL, NULL, NULL, NULL);
  85 }
  86
  87 static void puv3_init(ram_addr_t ram_size, const char *boot_device,
  88                      const char *kernel_filename, const char *kernel_cmdline,
  89                      const char *initrd_filename, const char *cpu_model)
  90 {
  91     CPUUniCore32State *env;
  92
  93     if (initrd_filename) {
  94         hw_error("Please use kernel built-in initramdisk.\n");
  95     }
  96
  97     if (!cpu_model) {
  98         cpu_model = "UniCore-II";
  99     }
 100
 101     env = cpu_init(cpu_model);
 102     if (!env) {
 103         hw_error("Unable to find CPU definition\n");
 104     }
 105
 106     puv3_soc_init(env);
 107     puv3_board_init(env, ram_size);
 108     puv3_load_kernel(kernel_filename);
 109 }
 110
 111 static QEMUMachine puv3_machine = {
 112     .name = "puv3",
 113     .desc = "PKUnity Version-3 based on UniCore32",
 114     .init = puv3_init,
 115     .use_scsi = 0,
 116 };
 117
 118 static void puv3_machine_init(void)
 119 {
 120     qemu_register_machine(&puv3_machine);
 121 }
 122
 123 machine_init(puv3_machine_init)