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

     /*-
      * Copyright (C) 2008 MARVELL INTERNATIONAL LTD.
      * All rights reserved.
      *
      * Developed by Semihalf.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of MARVELL nor the names of contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    
    #include <machine/bus.h>
    #include <machine/fdt.h>
    
    #include <arm/mv/mvreg.h>
    #include <arm/mv/mvvar.h>
    #include <arm/mv/mvwin.h>
    
    /*
     * Virtual address space layout:
     * -----------------------------
     * 0x0000_0000 - 0xBFFF_FFFF    : User Process (3 GB)
     * 0xC000_0000 - virtual_avail  : Kernel Reserved (text, data, page tables,
     *                              : stack etc.)
     * virtual-avail - 0xEFFF_FFFF  : KVA (virtual_avail is typically < 0xc0a0_0000)
     * 0xF000_0000 - 0xF0FF_FFFF    : No-Cache allocation area (16 MB)
     * 0xF100_0000 - 0xF10F_FFFF    : SoC Integrated devices registers range (1 MB)
     * 0xF110_0000 - 0xF11F_FFFF    : PCI-Express I/O space (1MB)
     * 0xF120_0000 - 0xF12F_FFFF    : PCI I/O space (1MB)
     * 0xF130_0000 - 0xF52F_FFFF    : PCI-Express memory space (64MB)
     * 0xF530_0000 - 0xF92F_FFFF    : PCI memory space (64MB)
     * 0xF930_0000 - 0xF93F_FFFF    : Device Bus: BOOT (1 MB)
     * 0xF940_0000 - 0xF94F_FFFF    : Device Bus: CS0 (1 MB)
     * 0xF950_0000 - 0xFB4F_FFFF    : Device Bus: CS1 (32 MB)
     * 0xFB50_0000 - 0xFB5F_FFFF    : Device Bus: CS2 (1 MB)
     * 0xFB60_0000 - 0xFFFE_FFFF    : Unused (~74MB)
     * 0xFFFF_0000 - 0xFFFF_0FFF    : 'High' vectors page (4 kB)
     * 0xFFFF_1000 - 0xFFFF_1FFF    : ARM_TP_ADDRESS/RAS page (4 kB)
     * 0xFFFF_2000 - 0xFFFF_FFFF    : Unused (56 kB)
     */
    
    
    struct resource_spec mv_gpio_res[] = {
            { SYS_RES_MEMORY,       0,      RF_ACTIVE },
            { SYS_RES_IRQ,          0,      RF_ACTIVE },
            { SYS_RES_IRQ,          1,      RF_ACTIVE },
            { SYS_RES_IRQ,          2,      RF_ACTIVE },
            { SYS_RES_IRQ,          3,      RF_ACTIVE },
            { -1, 0 }
    };
    
    const struct decode_win idma_win_tbl[] = {
            { 0 },
    };
    const struct decode_win *idma_wins = idma_win_tbl;
    int idma_wins_no = 0;
    
    const struct decode_win xor_win_tbl[] = {
            { 0 },
    };
    const struct decode_win *xor_wins = xor_win_tbl;
    int xor_wins_no = 0;
    
    uint32_t
    get_tclk(void)
    {
            uint32_t sar;
    
            /*
             * On Discovery TCLK is can be configured to 166 MHz or 200 MHz.
             * Current setting is read from Sample At Reset register.
             */
           sar = bus_space_read_4(fdtbus_bs_tag, MV_MPP_BASE, SAMPLE_AT_RESET_HI);
           sar = (sar & TCLK_MASK) >> TCLK_SHIFT;
   
           switch (sar) {
           case 0:
                   return (TCLK_166MHZ);
           case 1:
                   return (TCLK_200MHZ);
           default:
                   panic("Unknown TCLK settings!");
           }
   }

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