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      1 /*	$NetBSD: amiga_init.c,v 1.9 2010/01/24 15:39:50 phx Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1994 Michael L. Hitch
      5  * Copyright (c) 1993 Markus Wild
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *      This product includes software developed by Markus Wild.
     19  * 4. The name of the author may not be used to endorse or promote products
     20  *    derived from this software without specific prior written permission
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 #include <sys/cdefs.h>
     35 __KERNEL_RCSID(0, "$NetBSD: amiga_init.c,v 1.9 2010/01/24 15:39:50 phx Exp $");
     36 
     37 #include <sys/param.h>
     38 #include <amiga/amiga/cc.h>
     39 #include <amiga/amiga/cia.h>
     40 #include <amiga/amiga/custom.h>
     41 #include <amiga/amiga/cfdev.h>
     42 #include <amiga/amiga/memlist.h>
     43 
     44 int machineid;
     45 
     46 vaddr_t CHIPMEMADDR;
     47 vaddr_t chipmem_start;
     48 vaddr_t chipmem_end;
     49 
     50 u_long boot_fphystart, boot_fphysize, cphysize;
     51 u_long boot_flags;
     52 
     53 char *esym;			/* start address of cfdev/memlist-area */
     54 
     55 struct boot_memlist *memlist;
     56 
     57 struct cfdev *cfdev;
     58 int ncfdev;
     59 
     60 u_long scsi_nosync;
     61 int shift_nosync;
     62 
     63 void set_boot_args(int, u_long, u_long, u_long, char *, int, u_long, u_long);
     64 
     65 
     66 /*
     67  * called from locore.S, before initppc()
     68  */
     69 void
     70 set_boot_args(int boot_howto, u_long fstart, u_long fsize, u_long csize,
     71               char *esymaddr, int cpuid, u_long flags, u_long inhsync)
     72 {
     73 	char *end_loaded;
     74 
     75 	boothowto = boot_howto;
     76 	boot_fphystart = fstart;
     77 	boot_fphysize = fsize;
     78 	cphysize = csize;
     79 	esym = end_loaded = esymaddr;
     80 	machineid = cpuid;
     81 	boot_flags = flags;
     82 	scsi_nosync = inhsync;
     83 
     84 	/*
     85 	 * The kernel ends at end_loaded, plus the cfdev and memlist
     86 	 * structures we placed there in the loader.
     87 	 * esym already takes a potential symbol-table into account.
     88 	 */
     89 	ncfdev = *(int *)end_loaded;
     90 	cfdev = (struct cfdev *)(end_loaded + sizeof(int));
     91 	end_loaded += sizeof(int) + ncfdev * sizeof(struct cfdev);
     92 	memlist = (struct boot_memlist *)end_loaded;
     93 
     94 	CHIPMEMADDR = 0x0;
     95 	chipmem_start = CHIPMEMADDR;
     96 	chipmem_end  = (vaddr_t)csize;
     97 
     98 	CIAADDR = 0xbfd000;
     99 	CIAAbase = CIAADDR + 0x1001;
    100 	CIABbase = CIAADDR;
    101 
    102 	CUSTOMADDR = 0xdff000;
    103 	CUSTOMbase = CUSTOMADDR;
    104 }
    105 
    106 /*
    107  * called by cc_init_chipmem() from amiga/amiga/cc.c
    108  */
    109 void *
    110 chipmem_steal(long amount)
    111 {
    112 
    113 	/* steal from top of chipmem, as amiga68k does */
    114 	vaddr_t p = chipmem_end - amount;
    115 	if (p & 1)
    116 		p = p - 1;
    117 	chipmem_end = p;
    118 	if(chipmem_start > chipmem_end)
    119 		panic("not enough chip memory");
    120 	return((void *)p);
    121 }
    122 
    123 /*
    124  * Used by certain drivers currently to allocate zorro II or chip mem
    125  * for bounce buffers. For amigappc we will only return chip memory.
    126  */
    127 void *
    128 alloc_z2mem(long amount)
    129 {
    130 
    131 	return (alloc_chipmem(amount));
    132 }
    133