qemu

FORK: QEMU emulator
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bcm2835_fb.h (2388B)

      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 #include "qom/object.h"
     18 
     19 #define TYPE_BCM2835_FB "bcm2835-fb"
     20 OBJECT_DECLARE_SIMPLE_TYPE(BCM2835FBState, BCM2835_FB)
     21 
     22 /*
     23  * Configuration information about the fb which the guest can program
     24  * via the mailbox property interface.
     25  */
     26 typedef struct {
     27     uint32_t xres, yres;
     28     uint32_t xres_virtual, yres_virtual;
     29     uint32_t xoffset, yoffset;
     30     uint32_t bpp;
     31     uint32_t base;
     32     uint32_t pixo;
     33     uint32_t alpha;
     34 } BCM2835FBConfig;
     35 
     36 struct BCM2835FBState {
     37     /*< private >*/
     38     SysBusDevice busdev;
     39     /*< public >*/
     40 
     41     uint32_t vcram_base, vcram_size;
     42     MemoryRegion *dma_mr;
     43     AddressSpace dma_as;
     44     MemoryRegion iomem;
     45     MemoryRegionSection fbsection;
     46     QemuConsole *con;
     47     qemu_irq mbox_irq;
     48 
     49     bool lock, invalidate, pending;
     50 
     51     BCM2835FBConfig config;
     52     BCM2835FBConfig initial_config;
     53 };
     54 
     55 void bcm2835_fb_reconfigure(BCM2835FBState *s, BCM2835FBConfig *newconfig);
     56 
     57 /**
     58  * bcm2835_fb_get_pitch: return number of bytes per line of the framebuffer
     59  * @config: configuration info for the framebuffer
     60  *
     61  * Return the number of bytes per line of the framebuffer, ie the number
     62  * that must be added to a pixel address to get the address of the pixel
     63  * directly below it on screen.
     64  */
     65 static inline uint32_t bcm2835_fb_get_pitch(BCM2835FBConfig *config)
     66 {
     67     uint32_t xres = MAX(config->xres, config->xres_virtual);
     68     return xres * (config->bpp >> 3);
     69 }
     70 
     71 /**
     72  * bcm2835_fb_get_size: return total size of framebuffer in bytes
     73  * @config: configuration info for the framebuffer
     74  */
     75 static inline uint32_t bcm2835_fb_get_size(BCM2835FBConfig *config)
     76 {
     77     uint32_t yres = MAX(config->yres, config->yres_virtual);
     78     return yres * bcm2835_fb_get_pitch(config);
     79 }
     80 
     81 /**
     82  * bcm2835_fb_validate_config: check provided config
     83  *
     84  * Validates the configuration information provided by the guest and
     85  * adjusts it if necessary.
     86  */
     87 void bcm2835_fb_validate_config(BCM2835FBConfig *config);
     88 
     89 #endif