hw/etraxfs.c

   1 /*
   2  * QEMU ETRAX System Emulator
   3  *
   4  * Copyright (c) 2007 Edgar E. Iglesias, Axis Communications AB.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #include "sysbus.h"
  26 #include "boards.h"
  27 #include "sysemu.h"
  28 #include "net.h"
  29 #include "flash.h"
  30 #include "etraxfs.h"
  31 #include "loader.h"
  32 #include "elf.h"
  33
  34 #define FLASH_SIZE 0x2000000
  35 #define INTMEM_SIZE (128 * 1024)
  36
  37 static uint32_t bootstrap_pc;
  38
  39 static void main_cpu_reset(void *opaque)
  40 {
  41     CPUState *env = opaque;
  42     cpu_reset(env);
  43
  44     env->pc = bootstrap_pc;
  45 }
  46
  47 static
  48 void bareetraxfs_init (ram_addr_t ram_size,
  49                        const char *boot_device,
  50                        const char *kernel_filename, const char *kernel_cmdline,
  51                        const char *initrd_filename, const char *cpu_model)
  52 {
  53     DeviceState *dev;
  54     SysBusDevice *s;
  55     CPUState *env;
  56     qemu_irq irq[30], nmi[2], *cpu_irq;
  57     void *etraxfs_dmac;
  58     struct etraxfs_dma_client *eth[2] = {NULL, NULL};
  59     int kernel_size;
  60     DriveInfo *dinfo;
  61     int i;
  62     ram_addr_t phys_ram;
  63     ram_addr_t phys_flash;
  64     ram_addr_t phys_intmem;
  65
  66     /* init CPUs */
  67     if (cpu_model == NULL) {
  68         cpu_model = "crisv32";
  69     }
  70     env = cpu_init(cpu_model);
  71     qemu_register_reset(main_cpu_reset, env);
  72
  73     /* allocate RAM */
  74     phys_ram = qemu_ram_alloc(ram_size);
  75     cpu_register_physical_memory(0x40000000, ram_size, phys_ram | IO_MEM_RAM);
  76
  77     /* The ETRAX-FS has 128Kb on chip ram, the docs refer to it as the
  78        internal memory.  */
  79     phys_intmem = qemu_ram_alloc(INTMEM_SIZE);
  80     cpu_register_physical_memory(0x38000000, INTMEM_SIZE,
  81                                  phys_intmem | IO_MEM_RAM);
  82
  83
  84     phys_flash = qemu_ram_alloc(FLASH_SIZE);
  85     dinfo = drive_get(IF_PFLASH, 0, 0);
  86     pflash_cfi02_register(0x0, phys_flash,
  87                           dinfo ? dinfo->bdrv : NULL, (64 * 1024),
  88                           FLASH_SIZE >> 16,
  89                           1, 2, 0x0000, 0x0000, 0x0000, 0x0000,
  90                           0x555, 0x2aa);
  91     cpu_irq = cris_pic_init_cpu(env);
  92     dev = qdev_create(NULL, "etraxfs,pic");
  93     /* FIXME: Is there a proper way to signal vectors to the CPU core?  */
  94     qdev_prop_set_ptr(dev, "interrupt_vector", &env->interrupt_vector);
  95     qdev_init_nofail(dev);
  96     s = sysbus_from_qdev(dev);
  97     sysbus_mmio_map(s, 0, 0x3001c000);
  98     sysbus_connect_irq(s, 0, cpu_irq[0]);
  99     sysbus_connect_irq(s, 1, cpu_irq[1]);
 100     for (i = 0; i < 30; i++) {
 101         irq[i] = qdev_get_gpio_in(dev, i);
 102     }
 103     nmi[0] = qdev_get_gpio_in(dev, 30);
 104     nmi[1] = qdev_get_gpio_in(dev, 31);
 105
 106     etraxfs_dmac = etraxfs_dmac_init(0x30000000, 10);
 107     for (i = 0; i < 10; i++) {
 108         /* On ETRAX, odd numbered channels are inputs.  */
 109         etraxfs_dmac_connect(etraxfs_dmac, i, irq + 7 + i, i & 1);
 110     }
 111
 112     /* Add the two ethernet blocks.  */
 113     eth[0] = etraxfs_eth_init(&nd_table[0], 0x30034000, 1);
 114     if (nb_nics > 1)
 115         eth[1] = etraxfs_eth_init(&nd_table[1], 0x30036000, 2);
 116
 117     /* The DMA Connector block is missing, hardwire things for now.  */
 118     etraxfs_dmac_connect_client(etraxfs_dmac, 0, eth[0]);
 119     etraxfs_dmac_connect_client(etraxfs_dmac, 1, eth[0] + 1);
 120     if (eth[1]) {
 121         etraxfs_dmac_connect_client(etraxfs_dmac, 6, eth[1]);
 122         etraxfs_dmac_connect_client(etraxfs_dmac, 7, eth[1] + 1);
 123     }
 124
 125     /* 2 timers.  */
 126     sysbus_create_varargs("etraxfs,timer", 0x3001e000, irq[0x1b], nmi[1], NULL);
 127     sysbus_create_varargs("etraxfs,timer", 0x3005e000, irq[0x1b], nmi[1], NULL);
 128
 129     for (i = 0; i < 4; i++) {
 130         sysbus_create_simple("etraxfs,serial", 0x30026000 + i * 0x2000,
 131                              irq[0x14 + i]);
 132     }
 133
 134     if (kernel_filename) {
 135         uint64_t entry, high;
 136         int kcmdline_len;
 137
 138         /* Boots a kernel elf binary, os/linux-2.6/vmlinux from the axis
 139            devboard SDK.  */
 140         kernel_size = load_elf(kernel_filename, -0x80000000LL,
 141                                &entry, NULL, &high, 0, ELF_MACHINE, 0);
 142         bootstrap_pc = entry;
 143         if (kernel_size < 0) {
 144             /* Takes a kimage from the axis devboard SDK.  */
 145             kernel_size = load_image_targphys(kernel_filename, 0x40004000,
 146                                               ram_size);
 147             bootstrap_pc = 0x40004000;
 148             env->regs[9] = 0x40004000 + kernel_size;
 149         }
 150         env->regs[8] = 0x56902387; /* RAM init magic.  */
 151
 152         if (kernel_cmdline && (kcmdline_len = strlen(kernel_cmdline))) {
 153             if (kcmdline_len > 256) {
 154                 fprintf(stderr, "Too long CRIS kernel cmdline (max 256)\n");
 155                 exit(1);
 156             }
 157             /* Let the kernel know we are modifying the cmdline.  */
 158             env->regs[10] = 0x87109563;
 159             env->regs[11] = 0x40000000;
 160             pstrcpy_targphys("cmdline", env->regs[11], 256, kernel_cmdline);
 161         }
 162     }
 163     env->pc = bootstrap_pc;
 164
 165     printf ("pc =%x\n", env->pc);
 166     printf ("ram size =%ld\n", ram_size);
 167 }
 168
 169 static QEMUMachine bareetraxfs_machine = {
 170     .name = "bareetraxfs",
 171     .desc = "Bare ETRAX FS board",
 172     .init = bareetraxfs_init,
 173     .is_default = 1,
 174 };
 175
 176 static void bareetraxfs_machine_init(void)
 177 {
 178     qemu_register_machine(&bareetraxfs_machine);
 179 }
 180
 181 machine_init(bareetraxfs_machine_init);