ref: 4e4f2aca32c3409a5fca3341dccd14318c18f9b1
dir: /sys/src/9/xen/xen-public/hvm/ioreq.h/
/*
* ioreq.h: I/O request definitions for device models
* Copyright (c) 2004, Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifndef _IOREQ_H_
#define _IOREQ_H_
#define IOREQ_READ 1
#define IOREQ_WRITE 0
#define STATE_IOREQ_NONE 0
#define STATE_IOREQ_READY 1
#define STATE_IOREQ_INPROCESS 2
#define STATE_IORESP_READY 3
#define IOREQ_TYPE_PIO 0 /* pio */
#define IOREQ_TYPE_COPY 1 /* mmio ops */
#define IOREQ_TYPE_TIMEOFFSET 7
#define IOREQ_TYPE_INVALIDATE 8 /* mapcache */
/*
* VMExit dispatcher should cooperate with instruction decoder to
* prepare this structure and notify service OS and DM by sending
* virq
*/
struct ioreq {
uint64_t addr; /* physical address */
uint64_t data; /* data (or paddr of data) */
uint32_t count; /* for rep prefixes */
uint32_t size; /* size in bytes */
uint32_t vp_eport; /* evtchn for notifications to/from device model */
uint16_t _pad0;
uint8_t state:4;
uint8_t data_is_ptr:1; /* if 1, data above is the guest paddr
* of the real data to use. */
uint8_t dir:1; /* 1=read, 0=write */
uint8_t df:1;
uint8_t _pad1:1;
uint8_t type; /* I/O type */
};
typedef struct ioreq ioreq_t;
struct shared_iopage {
struct ioreq vcpu_ioreq[1];
};
typedef struct shared_iopage shared_iopage_t;
struct buf_ioreq {
uint8_t type; /* I/O type */
uint8_t pad:1;
uint8_t dir:1; /* 1=read, 0=write */
uint8_t size:2; /* 0=>1, 1=>2, 2=>4, 3=>8. If 8, use two buf_ioreqs */
uint32_t addr:20;/* physical address */
uint32_t data; /* data */
};
typedef struct buf_ioreq buf_ioreq_t;
#define IOREQ_BUFFER_SLOT_NUM 511 /* 8 bytes each, plus 2 4-byte indexes */
struct buffered_iopage {
unsigned int read_pointer;
unsigned int write_pointer;
buf_ioreq_t buf_ioreq[IOREQ_BUFFER_SLOT_NUM];
}; /* NB. Size of this structure must be no greater than one page. */
typedef struct buffered_iopage buffered_iopage_t;
/*
* ACPI Control/Event register locations. Location is controlled by a
* version number in HVM_PARAM_ACPI_IOPORTS_LOCATION.
*/
/* Version 0 (default): Traditional Xen locations. */
#define ACPI_PM1A_EVT_BLK_ADDRESS_V0 0x1f40
#define ACPI_PM1A_CNT_BLK_ADDRESS_V0 (ACPI_PM1A_EVT_BLK_ADDRESS_V0 + 0x04)
#define ACPI_PM_TMR_BLK_ADDRESS_V0 (ACPI_PM1A_EVT_BLK_ADDRESS_V0 + 0x08)
#define ACPI_GPE0_BLK_ADDRESS_V0 (ACPI_PM_TMR_BLK_ADDRESS_V0 + 0x20)
#define ACPI_GPE0_BLK_LEN_V0 0x08
/* Version 1: Locations preferred by modern Qemu. */
#define ACPI_PM1A_EVT_BLK_ADDRESS_V1 0xb000
#define ACPI_PM1A_CNT_BLK_ADDRESS_V1 (ACPI_PM1A_EVT_BLK_ADDRESS_V1 + 0x04)
#define ACPI_PM_TMR_BLK_ADDRESS_V1 (ACPI_PM1A_EVT_BLK_ADDRESS_V1 + 0x08)
#define ACPI_GPE0_BLK_ADDRESS_V1 0xafe0
#define ACPI_GPE0_BLK_LEN_V1 0x04
/* Compatibility definitions for the default location (version 0). */
#define ACPI_PM1A_EVT_BLK_ADDRESS ACPI_PM1A_EVT_BLK_ADDRESS_V0
#define ACPI_PM1A_CNT_BLK_ADDRESS ACPI_PM1A_CNT_BLK_ADDRESS_V0
#define ACPI_PM_TMR_BLK_ADDRESS ACPI_PM_TMR_BLK_ADDRESS_V0
#define ACPI_GPE0_BLK_ADDRESS ACPI_GPE0_BLK_ADDRESS_V0
#define ACPI_GPE0_BLK_LEN ACPI_GPE0_BLK_LEN_V0
#endif /* _IOREQ_H_ */
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/