hw/misc/omap_tap.c

   1 /*
   2  * TI OMAP TEST-Chip-level TAP emulation.
   3  *
   4  * Copyright (C) 2007-2008 Nokia Corporation
   5  * Written by Andrzej Zaborowski <andrew@openedhand.com>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 or
  10  * (at your option) any later version of the License.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include "qemu/osdep.h"
  22 #include "hw/hw.h"
  23 #include "hw/arm/omap.h"
  24
  25 /* TEST-Chip-level TAP */
  26 static uint64_t omap_tap_read(void *opaque, hwaddr addr,
  27                               unsigned size)
  28 {
  29     struct omap_mpu_state_s *s = (struct omap_mpu_state_s *) opaque;
  30
  31     if (size != 4) {
  32         return omap_badwidth_read32(opaque, addr);
  33     }
  34
  35     switch (addr) {
  36     case 0x204: /* IDCODE_reg */
  37         switch (s->mpu_model) {
  38         case omap2420:
  39         case omap2422:
  40         case omap2423:
  41             return 0x5b5d902f;  /* ES 2.2 */
  42         case omap2430:
  43             return 0x5b68a02f;  /* ES 2.2 */
  44         case omap3430:
  45             return 0x1b7ae02f;  /* ES 2 */
  46         default:
  47             hw_error("%s: Bad mpu model\n", __FUNCTION__);
  48         }
  49
  50     case 0x208: /* PRODUCTION_ID_reg for OMAP2 */
  51     case 0x210: /* PRODUCTION_ID_reg for OMAP3 */
  52         switch (s->mpu_model) {
  53         case omap2420:
  54             return 0x000254f0;  /* POP ESHS2.1.1 in N91/93/95, ES2 in N800 */
  55         case omap2422:
  56             return 0x000400f0;
  57         case omap2423:
  58             return 0x000800f0;
  59         case omap2430:
  60             return 0x000000f0;
  61         case omap3430:
  62             return 0x000000f0;
  63         default:
  64             hw_error("%s: Bad mpu model\n", __FUNCTION__);
  65         }
  66
  67     case 0x20c:
  68         switch (s->mpu_model) {
  69         case omap2420:
  70         case omap2422:
  71         case omap2423:
  72             return 0xcafeb5d9;  /* ES 2.2 */
  73         case omap2430:
  74             return 0xcafeb68a;  /* ES 2.2 */
  75         case omap3430:
  76             return 0xcafeb7ae;  /* ES 2 */
  77         default:
  78             hw_error("%s: Bad mpu model\n", __FUNCTION__);
  79         }
  80
  81     case 0x218: /* DIE_ID_reg */
  82         return ('Q' << 24) | ('E' << 16) | ('M' << 8) | ('U' << 0);
  83     case 0x21c: /* DIE_ID_reg */
  84         return 0x54 << 24;
  85     case 0x220: /* DIE_ID_reg */
  86         return ('Q' << 24) | ('E' << 16) | ('M' << 8) | ('U' << 0);
  87     case 0x224: /* DIE_ID_reg */
  88         return ('Q' << 24) | ('E' << 16) | ('M' << 8) | ('U' << 0);
  89     }
  90
  91     OMAP_BAD_REG(addr);
  92     return 0;
  93 }
  94
  95 static void omap_tap_write(void *opaque, hwaddr addr,
  96                            uint64_t value, unsigned size)
  97 {
  98     if (size != 4) {
  99         omap_badwidth_write32(opaque, addr, value);
 100         return;
 101     }
 102
 103     OMAP_BAD_REG(addr);
 104 }
 105
 106 static const MemoryRegionOps omap_tap_ops = {
 107     .read = omap_tap_read,
 108     .write = omap_tap_write,
 109     .endianness = DEVICE_NATIVE_ENDIAN,
 110 };
 111
 112 void omap_tap_init(struct omap_target_agent_s *ta,
 113                 struct omap_mpu_state_s *mpu)
 114 {
 115     memory_region_init_io(&mpu->tap_iomem, NULL, &omap_tap_ops, mpu, "omap.tap",
 116                           omap_l4_region_size(ta, 0));
 117     omap_l4_attach(ta, 0, &mpu->tap_iomem);
 118 }