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/xen/interface/hvm/ioreq.h

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    1 /*
    2  * ioreq.h: I/O request definitions for device models
    3  * Copyright (c) 2004, Intel Corporation.
    4  * 
    5  * Permission is hereby granted, free of charge, to any person obtaining a copy
    6  * of this software and associated documentation files (the "Software"), to
    7  * deal in the Software without restriction, including without limitation the
    8  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
    9  * sell copies of the Software, and to permit persons to whom the Software is
   10  * furnished to do so, subject to the following conditions:
   11  *
   12  * The above copyright notice and this permission notice shall be included in
   13  * all copies or substantial portions of the Software.
   14  *
   15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   18  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
   20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
   21  * DEALINGS IN THE SOFTWARE.
   22  */
   23 
   24 #ifndef _IOREQ_H_
   25 #define _IOREQ_H_
   26 
   27 #define IOREQ_READ      1
   28 #define IOREQ_WRITE     0
   29 
   30 #define STATE_IOREQ_NONE        0
   31 #define STATE_IOREQ_READY       1
   32 #define STATE_IOREQ_INPROCESS   2
   33 #define STATE_IORESP_READY      3
   34 
   35 #define IOREQ_TYPE_PIO          0 /* pio */
   36 #define IOREQ_TYPE_COPY         1 /* mmio ops */
   37 #define IOREQ_TYPE_TIMEOFFSET   7
   38 #define IOREQ_TYPE_INVALIDATE   8 /* mapcache */
   39 
   40 /*
   41  * VMExit dispatcher should cooperate with instruction decoder to
   42  * prepare this structure and notify service OS and DM by sending
   43  * virq
   44  */
   45 struct ioreq {
   46     uint64_t addr;          /* physical address */
   47     uint64_t data;          /* data (or paddr of data) */
   48     uint32_t count;         /* for rep prefixes */
   49     uint32_t size;          /* size in bytes */
   50     uint32_t vp_eport;      /* evtchn for notifications to/from device model */
   51     uint16_t _pad0;
   52     uint8_t state:4;
   53     uint8_t data_is_ptr:1;  /* if 1, data above is the guest paddr 
   54                              * of the real data to use. */
   55     uint8_t dir:1;          /* 1=read, 0=write */
   56     uint8_t df:1;
   57     uint8_t _pad1:1;
   58     uint8_t type;           /* I/O type */
   59 };
   60 typedef struct ioreq ioreq_t;
   61 
   62 struct shared_iopage {
   63     struct ioreq vcpu_ioreq[1];
   64 };
   65 typedef struct shared_iopage shared_iopage_t;
   66 
   67 struct buf_ioreq {
   68     uint8_t  type;   /* I/O type                    */
   69     uint8_t  pad:1;
   70     uint8_t  dir:1;  /* 1=read, 0=write             */
   71     uint8_t  size:2; /* 0=>1, 1=>2, 2=>4, 3=>8. If 8, use two buf_ioreqs */
   72     uint32_t addr:20;/* physical address            */
   73     uint32_t data;   /* data                        */
   74 };
   75 typedef struct buf_ioreq buf_ioreq_t;
   76 
   77 #define IOREQ_BUFFER_SLOT_NUM     511 /* 8 bytes each, plus 2 4-byte indexes */
   78 struct buffered_iopage {
   79     unsigned int read_pointer;
   80     unsigned int write_pointer;
   81     buf_ioreq_t buf_ioreq[IOREQ_BUFFER_SLOT_NUM];
   82 }; /* NB. Size of this structure must be no greater than one page. */
   83 typedef struct buffered_iopage buffered_iopage_t;
   84 
   85 #if defined(__ia64__)
   86 struct pio_buffer {
   87     uint32_t page_offset;
   88     uint32_t pointer;
   89     uint32_t data_end;
   90     uint32_t buf_size;
   91     void *opaque;
   92 };
   93 
   94 #define PIO_BUFFER_IDE_PRIMARY   0 /* I/O port = 0x1F0 */
   95 #define PIO_BUFFER_IDE_SECONDARY 1 /* I/O port = 0x170 */
   96 #define PIO_BUFFER_ENTRY_NUM     2
   97 struct buffered_piopage {
   98     struct pio_buffer pio[PIO_BUFFER_ENTRY_NUM];
   99     uint8_t buffer[1];
  100 };
  101 #endif /* defined(__ia64__) */
  102 
  103 /*
  104  * ACPI Control/Event register locations. Location is controlled by a 
  105  * version number in HVM_PARAM_ACPI_IOPORTS_LOCATION.
  106  */
  107 
  108 /* Version 0 (default): Traditional Xen locations. */
  109 #define ACPI_PM1A_EVT_BLK_ADDRESS_V0 0x1f40
  110 #define ACPI_PM1A_CNT_BLK_ADDRESS_V0 (ACPI_PM1A_EVT_BLK_ADDRESS_V0 + 0x04)
  111 #define ACPI_PM_TMR_BLK_ADDRESS_V0   (ACPI_PM1A_EVT_BLK_ADDRESS_V0 + 0x08)
  112 #define ACPI_GPE0_BLK_ADDRESS_V0     (ACPI_PM_TMR_BLK_ADDRESS_V0 + 0x20)
  113 #define ACPI_GPE0_BLK_LEN_V0         0x08
  114 
  115 /* Version 1: Locations preferred by modern Qemu. */
  116 #define ACPI_PM1A_EVT_BLK_ADDRESS_V1 0xb000
  117 #define ACPI_PM1A_CNT_BLK_ADDRESS_V1 (ACPI_PM1A_EVT_BLK_ADDRESS_V1 + 0x04)
  118 #define ACPI_PM_TMR_BLK_ADDRESS_V1   (ACPI_PM1A_EVT_BLK_ADDRESS_V1 + 0x08)
  119 #define ACPI_GPE0_BLK_ADDRESS_V1     0xafe0
  120 #define ACPI_GPE0_BLK_LEN_V1         0x04
  121 
  122 /* Compatibility definitions for the default location (version 0). */
  123 #define ACPI_PM1A_EVT_BLK_ADDRESS    ACPI_PM1A_EVT_BLK_ADDRESS_V0
  124 #define ACPI_PM1A_CNT_BLK_ADDRESS    ACPI_PM1A_CNT_BLK_ADDRESS_V0
  125 #define ACPI_PM_TMR_BLK_ADDRESS      ACPI_PM_TMR_BLK_ADDRESS_V0
  126 #define ACPI_GPE0_BLK_ADDRESS        ACPI_GPE0_BLK_ADDRESS_V0
  127 #define ACPI_GPE0_BLK_LEN            ACPI_GPE0_BLK_LEN_V0
  128 
  129 
  130 #endif /* _IOREQ_H_ */
  131 
  132 /*
  133  * Local variables:
  134  * mode: C
  135  * c-set-style: "BSD"
  136  * c-basic-offset: 4
  137  * tab-width: 4
  138  * indent-tabs-mode: nil
  139  * End:
  140  */

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