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 #include <time.h>
  25 #include <sys/time.h>
  26 #include "hw.h"
  27 #include "net.h"
  28 #include "flash.h"
  29 #include "sysemu.h"
  30 #include "devices.h"
  31 #include "boards.h"
  32
  33 #include "etraxfs.h"
  34
  35 #define FLASH_SIZE 0x2000000
  36 #define INTMEM_SIZE (128 * 1024)
  37
  38 static uint32_t bootstrap_pc;
  39
  40 static void main_cpu_reset(void *opaque)
  41 {
  42     CPUState *env = opaque;
  43     cpu_reset(env);
  44
  45     env->pregs[PR_CCS] &= ~I_FLAG;
  46     env->pc = bootstrap_pc;
  47 }
  48
  49 static
  50 void bareetraxfs_init (ram_addr_t ram_size, int vga_ram_size,
  51                        const char *boot_device, DisplayState *ds,
  52                        const char *kernel_filename, const char *kernel_cmdline,
  53                        const char *initrd_filename, const char *cpu_model)
  54 {
  55     CPUState *env;
  56     struct etraxfs_pic *pic;
  57     void *etraxfs_dmac;
  58     struct etraxfs_dma_client *eth[2] = {NULL, NULL};
  59     int kernel_size;
  60     int i;
  61     ram_addr_t phys_ram;
  62     ram_addr_t phys_flash;
  63     ram_addr_t phys_intmem;
  64
  65     /* init CPUs */
  66     if (cpu_model == NULL) {
  67         cpu_model = "crisv32";
  68     }
  69     env = cpu_init(cpu_model);
  70     qemu_register_reset(main_cpu_reset, env);
  71
  72     /* allocate RAM */
  73     phys_ram = qemu_ram_alloc(ram_size);
  74     cpu_register_physical_memory(0x40000000, ram_size, phys_ram | IO_MEM_RAM);
  75
  76     /* The ETRAX-FS has 128Kb on chip ram, the docs refer to it as the
  77        internal memory.  */
  78     phys_intmem = qemu_ram_alloc(INTMEM_SIZE);
  79     cpu_register_physical_memory(0x38000000, INTMEM_SIZE,
  80                                  phys_intmem | IO_MEM_RAM);
  81
  82
  83     phys_flash = qemu_ram_alloc(FLASH_SIZE);
  84     i = drive_get_index(IF_PFLASH, 0, 0);
  85     pflash_cfi02_register(0x0, phys_flash,
  86                           i != -1 ? drives_table[i].bdrv : NULL, (64 * 1024),
  87                           FLASH_SIZE >> 16,
  88                           1, 2, 0x0000, 0x0000, 0x0000, 0x0000,
  89                           0x555, 0x2aa);
  90     pic = etraxfs_pic_init(env, 0x3001c000);
  91     etraxfs_dmac = etraxfs_dmac_init(env, 0x30000000, 10);
  92     for (i = 0; i < 10; i++) {
  93         /* On ETRAX, odd numbered channels are inputs.  */
  94         etraxfs_dmac_connect(etraxfs_dmac, i, pic->irq + 7 + i, i & 1);
  95     }
  96
  97     /* Add the two ethernet blocks.  */
  98     eth[0] = etraxfs_eth_init(&nd_table[0], env, pic->irq + 25, 0x30034000);
  99     if (nb_nics > 1)
 100         eth[1] = etraxfs_eth_init(&nd_table[1], env, pic->irq + 26, 0x30036000);
 101
 102     /* The DMA Connector block is missing, hardwire things for now.  */
 103     etraxfs_dmac_connect_client(etraxfs_dmac, 0, eth[0]);
 104     etraxfs_dmac_connect_client(etraxfs_dmac, 1, eth[0] + 1);
 105     if (eth[1]) {
 106         etraxfs_dmac_connect_client(etraxfs_dmac, 6, eth[1]);
 107         etraxfs_dmac_connect_client(etraxfs_dmac, 7, eth[1] + 1);
 108     }
 109
 110     /* 2 timers.  */
 111     etraxfs_timer_init(env, pic->irq + 0x1b, pic->nmi + 1, 0x3001e000);
 112     etraxfs_timer_init(env, pic->irq + 0x1b, pic->nmi + 1, 0x3005e000);
 113
 114     for (i = 0; i < 4; i++) {
 115         if (serial_hds[i]) {
 116             etraxfs_ser_init(env, pic->irq + 0x14 + i,
 117                              serial_hds[i], 0x30026000 + i * 0x2000);
 118         }
 119     }
 120
 121     if (kernel_filename) {
 122         uint64_t entry, high;
 123         int kcmdline_len;
 124
 125         /* Boots a kernel elf binary, os/linux-2.6/vmlinux from the axis
 126            devboard SDK.  */
 127         kernel_size = load_elf(kernel_filename, -0x80000000LL,
 128                                &entry, NULL, &high);
 129         bootstrap_pc = entry;
 130         if (kernel_size < 0) {
 131             /* Takes a kimage from the axis devboard SDK.  */
 132             kernel_size = load_image(kernel_filename, phys_ram_base + 0x4000);
 133             bootstrap_pc = 0x40004000;
 134             env->regs[9] = 0x40004000 + kernel_size;
 135         }
 136         env->regs[8] = 0x56902387; /* RAM init magic.  */
 137
 138         if (kernel_cmdline && (kcmdline_len = strlen(kernel_cmdline))) {
 139             if (kcmdline_len > 256) {
 140                 fprintf(stderr, "Too long CRIS kernel cmdline (max 256)\n");
 141                 exit(1);
 142             }
 143             pstrcpy_targphys(high, 256, kernel_cmdline);
 144             /* Let the kernel know we are modifying the cmdline.  */
 145             env->regs[10] = 0x87109563;
 146             env->regs[11] = high;
 147         }
 148     }
 149     env->pc = bootstrap_pc;
 150
 151     printf ("pc =%x\n", env->pc);
 152     printf ("ram size =%ld\n", ram_size);
 153 }
 154
 155 QEMUMachine bareetraxfs_machine = {
 156     .name = "bareetraxfs",
 157     .desc = "Bare ETRAX FS board",
 158     .init = bareetraxfs_init,
 159     .ram_require = 0x8000000,
 160 };