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
  32 #define FLASH_SIZE 0x2000000
  33 #define INTMEM_SIZE (128 * 1024)
  34
  35 static uint32_t bootstrap_pc;
  36
  37 static void main_cpu_reset(void *opaque)
  38 {
  39     CPUState *env = opaque;
  40     cpu_reset(env);
  41
  42     env->pc = bootstrap_pc;
  43 }
  44
  45 static
  46 void bareetraxfs_init (ram_addr_t ram_size,
  47                        const char *boot_device,
  48                        const char *kernel_filename, const char *kernel_cmdline,
  49                        const char *initrd_filename, const char *cpu_model)
  50 {
  51     DeviceState *dev;
  52     CPUState *env;
  53     qemu_irq irq[30], nmi[2], *cpu_irq;
  54     void *etraxfs_dmac;
  55     struct etraxfs_dma_client *eth[2] = {NULL, NULL};
  56     int kernel_size;
  57     int i;
  58     ram_addr_t phys_ram;
  59     ram_addr_t phys_flash;
  60     ram_addr_t phys_intmem;
  61
  62     /* init CPUs */
  63     if (cpu_model == NULL) {
  64         cpu_model = "crisv32";
  65     }
  66     env = cpu_init(cpu_model);
  67     qemu_register_reset(main_cpu_reset, env);
  68
  69     /* allocate RAM */
  70     phys_ram = qemu_ram_alloc(ram_size);
  71     cpu_register_physical_memory(0x40000000, ram_size, phys_ram | IO_MEM_RAM);
  72
  73     /* The ETRAX-FS has 128Kb on chip ram, the docs refer to it as the
  74        internal memory.  */
  75     phys_intmem = qemu_ram_alloc(INTMEM_SIZE);
  76     cpu_register_physical_memory(0x38000000, INTMEM_SIZE,
  77                                  phys_intmem | IO_MEM_RAM);
  78
  79
  80     phys_flash = qemu_ram_alloc(FLASH_SIZE);
  81     i = drive_get_index(IF_PFLASH, 0, 0);
  82     pflash_cfi02_register(0x0, phys_flash,
  83                           i != -1 ? drives_table[i].bdrv : NULL, (64 * 1024),
  84                           FLASH_SIZE >> 16,
  85                           1, 2, 0x0000, 0x0000, 0x0000, 0x0000,
  86                           0x555, 0x2aa);
  87     cpu_irq = cris_pic_init_cpu(env);
  88     dev = sysbus_create_varargs("etraxfs,pic", 0x3001c000,
  89                                 cpu_irq[0], cpu_irq[1], NULL);
  90     /* FIXME: Is there a proper way to signal vectors to the CPU core?  */
  91     qdev_set_prop_ptr(dev, "interrupt_vector", &env->interrupt_vector);
  92     for (i = 0; i < 30; i++) {
  93         irq[i] = qdev_get_irq_sink(dev, i);
  94     }
  95     nmi[0] = qdev_get_irq_sink(dev, 30);
  96     nmi[1] = qdev_get_irq_sink(dev, 31);
  97
  98     etraxfs_dmac = etraxfs_dmac_init(env, 0x30000000, 10);
  99     for (i = 0; i < 10; i++) {
 100         /* On ETRAX, odd numbered channels are inputs.  */
 101         etraxfs_dmac_connect(etraxfs_dmac, i, irq + 7 + i, i & 1);
 102     }
 103
 104     /* Add the two ethernet blocks.  */
 105     eth[0] = etraxfs_eth_init(&nd_table[0], env, 0x30034000, 1);
 106     if (nb_nics > 1)
 107         eth[1] = etraxfs_eth_init(&nd_table[1], env, 0x30036000, 2);
 108
 109     /* The DMA Connector block is missing, hardwire things for now.  */
 110     etraxfs_dmac_connect_client(etraxfs_dmac, 0, eth[0]);
 111     etraxfs_dmac_connect_client(etraxfs_dmac, 1, eth[0] + 1);
 112     if (eth[1]) {
 113         etraxfs_dmac_connect_client(etraxfs_dmac, 6, eth[1]);
 114         etraxfs_dmac_connect_client(etraxfs_dmac, 7, eth[1] + 1);
 115     }
 116
 117     /* 2 timers.  */
 118     sysbus_create_varargs("etraxfs,timer", 0x3001e000, irq[0x1b], nmi[1], NULL);
 119     sysbus_create_varargs("etraxfs,timer", 0x3005e000, irq[0x1b], nmi[1], NULL);
 120
 121     for (i = 0; i < 4; i++) {
 122         sysbus_create_simple("etraxfs,serial", 0x30026000 + i * 0x2000,
 123                              irq[0x14 + i]);
 124     }
 125
 126     if (kernel_filename) {
 127         uint64_t entry, high;
 128         int kcmdline_len;
 129
 130         /* Boots a kernel elf binary, os/linux-2.6/vmlinux from the axis
 131            devboard SDK.  */
 132         kernel_size = load_elf(kernel_filename, -0x80000000LL,
 133                                &entry, NULL, &high);
 134         bootstrap_pc = entry;
 135         if (kernel_size < 0) {
 136             /* Takes a kimage from the axis devboard SDK.  */
 137             kernel_size = load_image_targphys(kernel_filename, 0x40004000,
 138                                               ram_size);
 139             bootstrap_pc = 0x40004000;
 140             env->regs[9] = 0x40004000 + kernel_size;
 141         }
 142         env->regs[8] = 0x56902387; /* RAM init magic.  */
 143
 144         if (kernel_cmdline && (kcmdline_len = strlen(kernel_cmdline))) {
 145             if (kcmdline_len > 256) {
 146                 fprintf(stderr, "Too long CRIS kernel cmdline (max 256)\n");
 147                 exit(1);
 148             }
 149             /* Let the kernel know we are modifying the cmdline.  */
 150             env->regs[10] = 0x87109563;
 151             env->regs[11] = 0x40000000;
 152             pstrcpy_targphys(env->regs[11], 256, kernel_cmdline);
 153         }
 154     }
 155     env->pc = bootstrap_pc;
 156
 157     printf ("pc =%x\n", env->pc);
 158     printf ("ram size =%ld\n", ram_size);
 159 }
 160
 161 QEMUMachine bareetraxfs_machine = {
 162     .name = "bareetraxfs",
 163     .desc = "Bare ETRAX FS board",
 164     .init = bareetraxfs_init,
 165 };