mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
126 lines
3.5 KiB
126 lines
3.5 KiB
/* SPDX-License-Identifier: MIT */ |
|
/* |
|
* fbif.h -- Xen virtual frame buffer device |
|
* |
|
* Copyright (C) 2005 Anthony Liguori <[email protected]> |
|
* Copyright (C) 2006 Red Hat, Inc., Markus Armbruster <[email protected]> |
|
*/ |
|
|
|
#ifndef __XEN_PUBLIC_IO_FBIF_H__ |
|
#define __XEN_PUBLIC_IO_FBIF_H__ |
|
|
|
/* Out events (frontend -> backend) */ |
|
|
|
/* |
|
* Out events may be sent only when requested by backend, and receipt |
|
* of an unknown out event is an error. |
|
*/ |
|
|
|
/* Event type 1 currently not used */ |
|
/* |
|
* Framebuffer update notification event |
|
* Capable frontend sets feature-update in xenstore. |
|
* Backend requests it by setting request-update in xenstore. |
|
*/ |
|
#define XENFB_TYPE_UPDATE 2 |
|
|
|
struct xenfb_update { |
|
uint8_t type; /* XENFB_TYPE_UPDATE */ |
|
int32_t x; /* source x */ |
|
int32_t y; /* source y */ |
|
int32_t width; /* rect width */ |
|
int32_t height; /* rect height */ |
|
}; |
|
|
|
/* |
|
* Framebuffer resize notification event |
|
* Capable backend sets feature-resize in xenstore. |
|
*/ |
|
#define XENFB_TYPE_RESIZE 3 |
|
|
|
struct xenfb_resize { |
|
uint8_t type; /* XENFB_TYPE_RESIZE */ |
|
int32_t width; /* width in pixels */ |
|
int32_t height; /* height in pixels */ |
|
int32_t stride; /* stride in bytes */ |
|
int32_t depth; /* depth in bits */ |
|
int32_t offset; /* start offset within framebuffer */ |
|
}; |
|
|
|
#define XENFB_OUT_EVENT_SIZE 40 |
|
|
|
union xenfb_out_event { |
|
uint8_t type; |
|
struct xenfb_update update; |
|
struct xenfb_resize resize; |
|
char pad[XENFB_OUT_EVENT_SIZE]; |
|
}; |
|
|
|
/* In events (backend -> frontend) */ |
|
|
|
/* |
|
* Frontends should ignore unknown in events. |
|
* No in events currently defined. |
|
*/ |
|
|
|
#define XENFB_IN_EVENT_SIZE 40 |
|
|
|
union xenfb_in_event { |
|
uint8_t type; |
|
char pad[XENFB_IN_EVENT_SIZE]; |
|
}; |
|
|
|
/* shared page */ |
|
|
|
#define XENFB_IN_RING_SIZE 1024 |
|
#define XENFB_IN_RING_LEN (XENFB_IN_RING_SIZE / XENFB_IN_EVENT_SIZE) |
|
#define XENFB_IN_RING_OFFS 1024 |
|
#define XENFB_IN_RING(page) \ |
|
((union xenfb_in_event *)((char *)(page) + XENFB_IN_RING_OFFS)) |
|
#define XENFB_IN_RING_REF(page, idx) \ |
|
(XENFB_IN_RING((page))[(idx) % XENFB_IN_RING_LEN]) |
|
|
|
#define XENFB_OUT_RING_SIZE 2048 |
|
#define XENFB_OUT_RING_LEN (XENFB_OUT_RING_SIZE / XENFB_OUT_EVENT_SIZE) |
|
#define XENFB_OUT_RING_OFFS (XENFB_IN_RING_OFFS + XENFB_IN_RING_SIZE) |
|
#define XENFB_OUT_RING(page) \ |
|
((union xenfb_out_event *)((char *)(page) + XENFB_OUT_RING_OFFS)) |
|
#define XENFB_OUT_RING_REF(page, idx) \ |
|
(XENFB_OUT_RING((page))[(idx) % XENFB_OUT_RING_LEN]) |
|
|
|
struct xenfb_page { |
|
uint32_t in_cons, in_prod; |
|
uint32_t out_cons, out_prod; |
|
|
|
int32_t width; /* width of the framebuffer (in pixels) */ |
|
int32_t height; /* height of the framebuffer (in pixels) */ |
|
uint32_t line_length; /* length of a row of pixels (in bytes) */ |
|
uint32_t mem_length; /* length of the framebuffer (in bytes) */ |
|
uint8_t depth; /* depth of a pixel (in bits) */ |
|
|
|
/* |
|
* Framebuffer page directory |
|
* |
|
* Each directory page holds PAGE_SIZE / sizeof(*pd) |
|
* framebuffer pages, and can thus map up to PAGE_SIZE * |
|
* PAGE_SIZE / sizeof(*pd) bytes. With PAGE_SIZE == 4096 and |
|
* sizeof(unsigned long) == 4/8, that's 4 Megs 32 bit and 2 |
|
* Megs 64 bit. 256 directories give enough room for a 512 |
|
* Meg framebuffer with a max resolution of 12,800x10,240. |
|
* Should be enough for a while with room leftover for |
|
* expansion. |
|
*/ |
|
unsigned long pd[256]; |
|
}; |
|
|
|
/* |
|
* Wart: xenkbd needs to know default resolution. Put it here until a |
|
* better solution is found, but don't leak it to the backend. |
|
*/ |
|
#ifdef __KERNEL__ |
|
#define XENFB_WIDTH 800 |
|
#define XENFB_HEIGHT 600 |
|
#define XENFB_DEPTH 32 |
|
#endif |
|
|
|
#endif
|
|
|