The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/arm/mv/discovery/discovery.c

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    1 /*-
    2  * Copyright (C) 2008 MARVELL INTERNATIONAL LTD.
    3  * All rights reserved.
    4  *
    5  * Developed by Semihalf.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of MARVELL nor the names of contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  */
   31 
   32 #include <sys/cdefs.h>
   33 __FBSDID("$FreeBSD: releng/11.1/sys/arm/mv/discovery/discovery.c 235609 2012-05-18 14:41:14Z gber $");
   34 
   35 #include <sys/param.h>
   36 #include <sys/systm.h>
   37 #include <sys/bus.h>
   38 
   39 #include <machine/bus.h>
   40 #include <machine/fdt.h>
   41 
   42 #include <arm/mv/mvreg.h>
   43 #include <arm/mv/mvvar.h>
   44 #include <arm/mv/mvwin.h>
   45 
   46 /*
   47  * Virtual address space layout:
   48  * -----------------------------
   49  * 0x0000_0000 - 0xBFFF_FFFF    : User Process (3 GB)
   50  * 0xC000_0000 - virtual_avail  : Kernel Reserved (text, data, page tables,
   51  *                              : stack etc.)
   52  * virtual-avail - 0xEFFF_FFFF  : KVA (virtual_avail is typically < 0xc0a0_0000)
   53  * 0xF000_0000 - 0xF0FF_FFFF    : No-Cache allocation area (16 MB)
   54  * 0xF100_0000 - 0xF10F_FFFF    : SoC Integrated devices registers range (1 MB)
   55  * 0xF110_0000 - 0xF11F_FFFF    : PCI-Express I/O space (1MB)
   56  * 0xF120_0000 - 0xF12F_FFFF    : PCI I/O space (1MB)
   57  * 0xF130_0000 - 0xF52F_FFFF    : PCI-Express memory space (64MB)
   58  * 0xF530_0000 - 0xF92F_FFFF    : PCI memory space (64MB)
   59  * 0xF930_0000 - 0xF93F_FFFF    : Device Bus: BOOT (1 MB)
   60  * 0xF940_0000 - 0xF94F_FFFF    : Device Bus: CS0 (1 MB)
   61  * 0xF950_0000 - 0xFB4F_FFFF    : Device Bus: CS1 (32 MB)
   62  * 0xFB50_0000 - 0xFB5F_FFFF    : Device Bus: CS2 (1 MB)
   63  * 0xFB60_0000 - 0xFFFE_FFFF    : Unused (~74MB)
   64  * 0xFFFF_0000 - 0xFFFF_0FFF    : 'High' vectors page (4 kB)
   65  * 0xFFFF_1000 - 0xFFFF_1FFF    : ARM_TP_ADDRESS/RAS page (4 kB)
   66  * 0xFFFF_2000 - 0xFFFF_FFFF    : Unused (56 kB)
   67  */
   68 
   69 
   70 struct resource_spec mv_gpio_res[] = {
   71         { SYS_RES_MEMORY,       0,      RF_ACTIVE },
   72         { SYS_RES_IRQ,          0,      RF_ACTIVE },
   73         { SYS_RES_IRQ,          1,      RF_ACTIVE },
   74         { SYS_RES_IRQ,          2,      RF_ACTIVE },
   75         { SYS_RES_IRQ,          3,      RF_ACTIVE },
   76         { -1, 0 }
   77 };
   78 
   79 const struct decode_win idma_win_tbl[] = {
   80         { 0 },
   81 };
   82 const struct decode_win *idma_wins = idma_win_tbl;
   83 int idma_wins_no = 0;
   84 
   85 const struct decode_win xor_win_tbl[] = {
   86         { 0 },
   87 };
   88 const struct decode_win *xor_wins = xor_win_tbl;
   89 int xor_wins_no = 0;
   90 
   91 uint32_t
   92 get_tclk(void)
   93 {
   94         uint32_t sar;
   95 
   96         /*
   97          * On Discovery TCLK is can be configured to 166 MHz or 200 MHz.
   98          * Current setting is read from Sample At Reset register.
   99          */
  100         sar = bus_space_read_4(fdtbus_bs_tag, MV_MPP_BASE, SAMPLE_AT_RESET_HI);
  101         sar = (sar & TCLK_MASK) >> TCLK_SHIFT;
  102 
  103         switch (sar) {
  104         case 0:
  105                 return (TCLK_166MHZ);
  106         case 1:
  107                 return (TCLK_200MHZ);
  108         default:
  109                 panic("Unknown TCLK settings!");
  110         }
  111 }

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