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/i386/include/xen/xenvar.h

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    1 /*-
    2  * Copyright (c) 2008 Kip Macy
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD: releng/10.0/sys/i386/include/xen/xenvar.h 255781 2013-09-22 00:54:22Z gibbs $
   27  */
   28 
   29 #ifndef XENVAR_H_
   30 #define XENVAR_H_
   31 
   32 #include <machine/xen/features.h>
   33 
   34 #if defined(XEN)
   35 
   36 #define XBOOTUP 0x1
   37 #define XPMAP   0x2
   38 extern int xendebug_flags;
   39 #ifndef NOXENDEBUG
   40 /* Print directly to the Xen console during debugging. */
   41 #define XENPRINTF xc_printf
   42 #else
   43 #define XENPRINTF printf
   44 #endif
   45 
   46 extern  xen_pfn_t *xen_phys_machine;
   47 extern  xen_pfn_t *xen_pfn_to_mfn_frame_list[16];
   48 extern  xen_pfn_t *xen_pfn_to_mfn_frame_list_list;
   49 
   50 #if 0
   51 #define TRACE_ENTER XENPRINTF("(file=%s, line=%d) entered %s\n", __FILE__, __LINE__, __FUNCTION__)
   52 #define TRACE_EXIT XENPRINTF("(file=%s, line=%d) exiting %s\n", __FILE__, __LINE__, __FUNCTION__)
   53 #define TRACE_DEBUG(argflags, _f, _a...) \
   54 if (xendebug_flags & argflags) XENPRINTF("(file=%s, line=%d) " _f "\n", __FILE__, __LINE__, ## _a);
   55 #else
   56 #define TRACE_ENTER
   57 #define TRACE_EXIT
   58 #define TRACE_DEBUG(argflags, _f, _a...)
   59 #endif
   60 
   61 extern xen_pfn_t *xen_machine_phys;
   62 /* Xen starts physical pages after the 4MB ISA hole -
   63  * FreeBSD doesn't
   64  */
   65 
   66 
   67 #undef ADD_ISA_HOLE /* XXX */
   68 
   69 #ifdef ADD_ISA_HOLE
   70 #define ISA_INDEX_OFFSET 1024 
   71 #define ISA_PDR_OFFSET 1
   72 #else
   73 #define ISA_INDEX_OFFSET 0
   74 #define ISA_PDR_OFFSET 0
   75 #endif
   76 
   77 
   78 #define PFNTOMFN(i) (xen_phys_machine[(i)])
   79 #define MFNTOPFN(i) ((vm_paddr_t)xen_machine_phys[(i)])
   80 
   81 #define VTOP(x) ((((uintptr_t)(x))) - KERNBASE)
   82 #define PTOV(x) (((uintptr_t)(x)) + KERNBASE)
   83 
   84 #define VTOPFN(x) (VTOP(x) >> PAGE_SHIFT)
   85 #define PFNTOV(x) PTOV((vm_paddr_t)(x)  << PAGE_SHIFT)
   86 
   87 #define VTOMFN(va) (vtomach(va) >> PAGE_SHIFT)
   88 #define PFN_UP(x)    (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
   89 
   90 #define phystomach(pa) (((vm_paddr_t)(PFNTOMFN((pa) >> PAGE_SHIFT))) << PAGE_SHIFT)
   91 #define machtophys(ma) (((vm_paddr_t)(MFNTOPFN((ma) >> PAGE_SHIFT))) << PAGE_SHIFT)
   92 
   93 
   94 void xpq_init(void);
   95 
   96 #define BITS_PER_LONG 32
   97 #define NR_CPUS      XEN_LEGACY_MAX_VCPUS
   98 
   99 #define BITS_TO_LONGS(bits) \
  100         (((bits)+BITS_PER_LONG-1)/BITS_PER_LONG)
  101 #define DECLARE_BITMAP(name,bits) \
  102         unsigned long name[BITS_TO_LONGS(bits)]
  103 
  104 int  xen_create_contiguous_region(vm_page_t pages, int npages);
  105 
  106 void  xen_destroy_contiguous_region(void * addr, int npages);
  107 
  108 #elif defined(XENHVM)
  109 
  110 #define vtomach(va)     pmap_kextract((vm_offset_t) (va))
  111 #define PFNTOMFN(pa)    (pa)
  112 #define MFNTOPFN(ma)    (ma)
  113 
  114 #define set_phys_to_machine(pfn, mfn)           ((void)0)
  115 #define phys_to_machine_mapping_valid(pfn)      (TRUE)
  116 
  117 #endif /* !XEN && !XENHVM */
  118 
  119 #endif

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