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
  51 static void puv3_board_init(CPUUniCore32State *env, ram_addr_t ram_size)
  52 {
  53     MemoryRegion *ram_memory = g_new(MemoryRegion, 1);
  54
  55     /* SDRAM at address zero.  */
  56     memory_region_init_ram(ram_memory, "puv3.ram", ram_size);
  57     vmstate_register_ram_global(ram_memory);
  58     memory_region_add_subregion(get_system_memory(), 0, ram_memory);
  59 }
  60
  61 static void puv3_load_kernel(const char *kernel_filename)
  62 {
  63     int size;
  64
  65     assert(kernel_filename != NULL);
  66
  67     /* only zImage format supported */
  68     size = load_image_targphys(kernel_filename, KERNEL_LOAD_ADDR,
  69             KERNEL_MAX_SIZE);
  70     if (size < 0) {
  71         hw_error("Load kernel error: '%s'\n", kernel_filename);
  72     }
  73
  74     /* cheat curses that we have a graphic console, only under ocd console */
  75     graphic_console_init(NULL, NULL, NULL, NULL, NULL);
  76 }
  77
  78 static void puv3_init(ram_addr_t ram_size, const char *boot_device,
  79                      const char *kernel_filename, const char *kernel_cmdline,
  80                      const char *initrd_filename, const char *cpu_model)
  81 {
  82     CPUUniCore32State *env;
  83
  84     if (initrd_filename) {
  85         hw_error("Please use kernel built-in initramdisk.\n");
  86     }
  87
  88     if (!cpu_model) {
  89         cpu_model = "UniCore-II";
  90     }
  91
  92     env = cpu_init(cpu_model);
  93     if (!env) {
  94         hw_error("Unable to find CPU definition\n");
  95     }
  96
  97     puv3_soc_init(env);
  98     puv3_board_init(env, ram_size);
  99     puv3_load_kernel(kernel_filename);
 100 }
 101
 102 static QEMUMachine puv3_machine = {
 103     .name = "puv3",
 104     .desc = "PKUnity Version-3 based on UniCore32",
 105     .init = puv3_init,
 106     .use_scsi = 0,
 107 };
 108
 109 static void puv3_machine_init(void)
 110 {
 111     qemu_register_machine(&puv3_machine);
 112 }
 113
 114 machine_init(puv3_machine_init)