include/hw/display/bcm2835_fb.h

   1 /*
   2  * Raspberry Pi emulation (c) 2012 Gregory Estrade
   3  * Upstreaming code cleanup [including bcm2835_*] (c) 2013 Jan Petrous
   4  *
   5  * Rasperry Pi 2 emulation and refactoring Copyright (c) 2015, Microsoft
   6  * Written by Andrew Baumann
   7  *
   8  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   9  * See the COPYING file in the top-level directory.
  10  */
  11
  12 #ifndef BCM2835_FB_H
  13 #define BCM2835_FB_H
  14
  15 #include "hw/sysbus.h"
  16 #include "ui/console.h"
  17
  18 #define TYPE_BCM2835_FB "bcm2835-fb"
  19 #define BCM2835_FB(obj) OBJECT_CHECK(BCM2835FBState, (obj), TYPE_BCM2835_FB)
  20
  21 /*
  22  * Configuration information about the fb which the guest can program
  23  * via the mailbox property interface.
  24  */
  25 typedef struct {
  26     uint32_t xres, yres;
  27     uint32_t xres_virtual, yres_virtual;
  28     uint32_t xoffset, yoffset;
  29     uint32_t bpp;
  30     uint32_t base;
  31     uint32_t pixo;
  32     uint32_t alpha;
  33 } BCM2835FBConfig;
  34
  35 typedef struct {
  36     /*< private >*/
  37     SysBusDevice busdev;
  38     /*< public >*/
  39
  40     uint32_t vcram_base, vcram_size;
  41     MemoryRegion *dma_mr;
  42     AddressSpace dma_as;
  43     MemoryRegion iomem;
  44     MemoryRegionSection fbsection;
  45     QemuConsole *con;
  46     qemu_irq mbox_irq;
  47
  48     bool lock, invalidate, pending;
  49
  50     BCM2835FBConfig config;
  51     BCM2835FBConfig initial_config;
  52 } BCM2835FBState;
  53
  54 void bcm2835_fb_reconfigure(BCM2835FBState *s, BCM2835FBConfig *newconfig);
  55
  56 /**
  57  * bcm2835_fb_get_pitch: return number of bytes per line of the framebuffer
  58  * @config: configuration info for the framebuffer
  59  *
  60  * Return the number of bytes per line of the framebuffer, ie the number
  61  * that must be added to a pixel address to get the address of the pixel
  62  * directly below it on screen.
  63  */
  64 static inline uint32_t bcm2835_fb_get_pitch(BCM2835FBConfig *config)
  65 {
  66     uint32_t xres = MAX(config->xres, config->xres_virtual);
  67     return xres * (config->bpp >> 3);
  68 }
  69
  70 /**
  71  * bcm2835_fb_get_size: return total size of framebuffer in bytes
  72  * @config: configuration info for the framebuffer
  73  */
  74 static inline uint32_t bcm2835_fb_get_size(BCM2835FBConfig *config)
  75 {
  76     uint32_t yres = MAX(config->yres, config->yres_virtual);
  77     return yres * bcm2835_fb_get_pitch(config);
  78 }
  79
  80 /**
  81  * bcm2835_fb_validate_config: check provided config
  82  *
  83  * Validates the configuration information provided by the guest and
  84  * adjusts it if necessary.
  85  */
  86 void bcm2835_fb_validate_config(BCM2835FBConfig *config);
  87
  88 #endif