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 "etraxfs.h"
  30
  31 #define FLASH_SIZE 0x2000000
  32 #define INTMEM_SIZE (128 * 1024)
  33
  34 static uint32_t bootstrap_pc;
  35
  36 static void main_cpu_reset(void *opaque)
  37 {
  38     CPUState *env = opaque;
  39     cpu_reset(env);
  40
  41     env->pc = bootstrap_pc;
  42 }
  43
  44 static
  45 void bareetraxfs_init (ram_addr_t ram_size,
  46                        const char *boot_device,
  47                        const char *kernel_filename, const char *kernel_cmdline,
  48                        const char *initrd_filename, const char *cpu_model)
  49 {
  50     CPUState *env;
  51     qemu_irq *irq, *nmi;
  52     void *etraxfs_dmac;
  53     struct etraxfs_dma_client *eth[2] = {NULL, NULL};
  54     int kernel_size;
  55     int i;
  56     ram_addr_t phys_ram;
  57     ram_addr_t phys_flash;
  58     ram_addr_t phys_intmem;
  59
  60     /* init CPUs */
  61     if (cpu_model == NULL) {
  62         cpu_model = "crisv32";
  63     }
  64     env = cpu_init(cpu_model);
  65     qemu_register_reset(main_cpu_reset, env);
  66
  67     /* allocate RAM */
  68     phys_ram = qemu_ram_alloc(ram_size);
  69     cpu_register_physical_memory(0x40000000, ram_size, phys_ram | IO_MEM_RAM);
  70
  71     /* The ETRAX-FS has 128Kb on chip ram, the docs refer to it as the
  72        internal memory.  */
  73     phys_intmem = qemu_ram_alloc(INTMEM_SIZE);
  74     cpu_register_physical_memory(0x38000000, INTMEM_SIZE,
  75                                  phys_intmem | IO_MEM_RAM);
  76
  77
  78     phys_flash = qemu_ram_alloc(FLASH_SIZE);
  79     i = drive_get_index(IF_PFLASH, 0, 0);
  80     pflash_cfi02_register(0x0, phys_flash,
  81                           i != -1 ? drives_table[i].bdrv : NULL, (64 * 1024),
  82                           FLASH_SIZE >> 16,
  83                           1, 2, 0x0000, 0x0000, 0x0000, 0x0000,
  84                           0x555, 0x2aa);
  85     irq = etraxfs_pic_init(env, 0x3001c000);
  86     nmi = irq + 30;
  87
  88     etraxfs_dmac = etraxfs_dmac_init(env, 0x30000000, 10);
  89     for (i = 0; i < 10; i++) {
  90         /* On ETRAX, odd numbered channels are inputs.  */
  91         etraxfs_dmac_connect(etraxfs_dmac, i, irq + 7 + i, i & 1);
  92     }
  93
  94     /* Add the two ethernet blocks.  */
  95     eth[0] = etraxfs_eth_init(&nd_table[0], env, irq + 25, 0x30034000, 1);
  96     if (nb_nics > 1)
  97         eth[1] = etraxfs_eth_init(&nd_table[1], env,
  98                                   irq + 26, 0x30036000, 2);
  99
 100     /* The DMA Connector block is missing, hardwire things for now.  */
 101     etraxfs_dmac_connect_client(etraxfs_dmac, 0, eth[0]);
 102     etraxfs_dmac_connect_client(etraxfs_dmac, 1, eth[0] + 1);
 103     if (eth[1]) {
 104         etraxfs_dmac_connect_client(etraxfs_dmac, 6, eth[1]);
 105         etraxfs_dmac_connect_client(etraxfs_dmac, 7, eth[1] + 1);
 106     }
 107
 108     /* 2 timers.  */
 109     etraxfs_timer_init(env, irq + 0x1b, nmi + 1, 0x3001e000);
 110     etraxfs_timer_init(env, irq + 0x1b, nmi + 1, 0x3005e000);
 111
 112     for (i = 0; i < 4; i++) {
 113         sysbus_create_simple("etraxfs,serial", 0x30026000 + i * 0x2000,
 114                              irq[0x14 + i]);
 115     }
 116
 117     if (kernel_filename) {
 118         uint64_t entry, high;
 119         int kcmdline_len;
 120
 121         /* Boots a kernel elf binary, os/linux-2.6/vmlinux from the axis
 122            devboard SDK.  */
 123         kernel_size = load_elf(kernel_filename, -0x80000000LL,
 124                                &entry, NULL, &high);
 125         bootstrap_pc = entry;
 126         if (kernel_size < 0) {
 127             /* Takes a kimage from the axis devboard SDK.  */
 128             kernel_size = load_image_targphys(kernel_filename, 0x40004000,
 129                                               ram_size);
 130             bootstrap_pc = 0x40004000;
 131             env->regs[9] = 0x40004000 + kernel_size;
 132         }
 133         env->regs[8] = 0x56902387; /* RAM init magic.  */
 134
 135         if (kernel_cmdline && (kcmdline_len = strlen(kernel_cmdline))) {
 136             if (kcmdline_len > 256) {
 137                 fprintf(stderr, "Too long CRIS kernel cmdline (max 256)\n");
 138                 exit(1);
 139             }
 140             /* Let the kernel know we are modifying the cmdline.  */
 141             env->regs[10] = 0x87109563;
 142             env->regs[11] = 0x40000000;
 143             pstrcpy_targphys(env->regs[11], 256, kernel_cmdline);
 144         }
 145     }
 146     env->pc = bootstrap_pc;
 147
 148     printf ("pc =%x\n", env->pc);
 149     printf ("ram size =%ld\n", ram_size);
 150 }
 151
 152 QEMUMachine bareetraxfs_machine = {
 153     .name = "bareetraxfs",
 154     .desc = "Bare ETRAX FS board",
 155     .init = bareetraxfs_init,
 156 };