avr/qmk/ChibiOS - [no description]

	Commit message (Expand)	Author	Age	Files	Lines
*	git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@9851 35acf78f-673a-0410...	Giovanni Di Sirio	2016-10-04	1	-1/+1
*	STM32F0 WDG demo added.	Giovanni Di Sirio	2016-10-04	9	-0/+1551

/****************************************************************************** * blkif.h * * Unified block-device I/O interface for Xen guest OSes. * * Copyright (c) 2003-2004, Keir Fraser */ #ifndef __XEN_PUBLIC_IO_BLKIF_H__ #define __XEN_PUBLIC_IO_BLKIF_H__ #include "ring.h" #define blkif_vdev_t u16 #define blkif_sector_t u64 #define BLKIF_OP_READ 0 #define BLKIF_OP_WRITE 1 #define BLKIF_OP_PROBE 2 /* NB. Ring size must be small enough for sizeof(blkif_ring_t) <= PAGE_SIZE. */ #define BLKIF_RING_SIZE 64 /* * Maximum scatter/gather segments per request. * This is carefully chosen so that sizeof(blkif_ring_t) <= PAGE_SIZE. * NB. This could be 12 if the ring indexes weren't stored in the same page. */ #define BLKIF_MAX_SEGMENTS_PER_REQUEST 11 typedef struct { u8 operation; /* 0: BLKIF_OP_??? */ u8 nr_segments; /* 1: number of segments */ blkif_vdev_t device; /* 2: only for read/write requests */ unsigned long id; /* 4: private guest value, echoed in resp */ blkif_sector_t sector_number; /* start sector idx on disk (r/w only) */ /* @f_a_s[2:0]=last_sect ; @f_a_s[5:3]=first_sect */ #ifdef CONFIG_XEN_BLKDEV_GRANT /* @f_a_s[:16]= grant reference (16 bits) */ #else /* @f_a_s[:12]=@frame: machine page frame number. */ #endif /* @first_sect: first sector in frame to transfer (inclusive). */ /* @last_sect: last sector in frame to transfer (inclusive). */ unsigned long frame_and_sects[BLKIF_MAX_SEGMENTS_PER_REQUEST]; } PACKED blkif_request_t; #define blkif_first_sect(_fas) (((_fas)>>3)&7) #define blkif_last_sect(_fas) ((_fas)&7) #ifdef CONFIG_XEN_BLKDEV_GRANT #define blkif_gref_from_fas(_fas) ((_fas)>>16) #endif typedef struct { unsigned long id; /* copied from request */ u8 operation; /* copied from request */ s16 status; /* BLKIF_RSP_??? */ } PACKED blkif_response_t; #define BLKIF_RSP_ERROR -1 /* non-specific 'error' */ #define BLKIF_RSP_OKAY 0 /* non-specific 'okay' */ /* * Generate blkif ring structures and types. */ DEFINE_RING_TYPES(blkif, blkif_request_t, blkif_response_t); /* * BLKIF_OP_PROBE: * The request format for a probe request is constrained as follows: * @operation == BLKIF_OP_PROBE * @nr_segments == size of probe buffer in pages * @device == unused (zero) * @id == any value (echoed in response message) * @sector_num == unused (zero) * @frame_and_sects == list of page-sized buffers. * (i.e., @first_sect == 0, @last_sect == 7). * * The response is a list of vdisk_t elements copied into the out-of-band * probe buffer. On success the response status field contains the number * of vdisk_t elements. */ /* XXX SMH: Type values below are chosen to match ide_xxx in Linux ide.h. */ #define VDISK_TYPE_FLOPPY 0x00 #define VDISK_TYPE_TAPE 0x01 #define VDISK_TYPE_CDROM 0x05 #define VDISK_TYPE_OPTICAL 0x07 #define VDISK_TYPE_DISK 0x20 #define VDISK_TYPE_MASK 0x3F #define VDISK_TYPE(_x) ((_x) & VDISK_TYPE_MASK) /* The top two bits of the type field encode various flags. */ #define VDISK_FLAG_RO 0x40 #define VDISK_FLAG_VIRT 0x80 #define VDISK_READONLY(_x) ((_x) & VDISK_FLAG_RO) #define VDISK_VIRTUAL(_x) ((_x) & VDISK_FLAG_VIRT) typedef struct { blkif_sector_t capacity; /* 0: Size in terms of 512-byte sectors. */ blkif_vdev_t device; /* 8: Device number (opaque 16 bit value). */ u16 info; /* 10: Device type and flags (VDISK_*). */ } PACKED vdisk_t; /* 12 bytes */ #endif /* __XEN_PUBLIC_IO_BLKIF_H__ */