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9a1f03f4ee
Abstract out the calculation of the pitch and size of the framebuffer into functions that operate on the BCM2835FBConfig struct -- these are about to get a little more complicated when we add support for virtual and physical sizes differing. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20180814144436.679-6-peter.maydell@linaro.org
77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
/*
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* Raspberry Pi emulation (c) 2012 Gregory Estrade
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* Upstreaming code cleanup [including bcm2835_*] (c) 2013 Jan Petrous
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*
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* Rasperry Pi 2 emulation and refactoring Copyright (c) 2015, Microsoft
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* Written by Andrew Baumann
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*
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* This code is licensed under the GNU GPLv2 and later.
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*/
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#ifndef BCM2835_FB_H
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#define BCM2835_FB_H
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#include "hw/sysbus.h"
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#include "ui/console.h"
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#define TYPE_BCM2835_FB "bcm2835-fb"
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#define BCM2835_FB(obj) OBJECT_CHECK(BCM2835FBState, (obj), TYPE_BCM2835_FB)
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/*
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* Configuration information about the fb which the guest can program
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* via the mailbox property interface.
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*/
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typedef struct {
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uint32_t xres, yres;
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uint32_t xres_virtual, yres_virtual;
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uint32_t xoffset, yoffset;
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uint32_t bpp;
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uint32_t base;
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uint32_t pixo;
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uint32_t alpha;
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} BCM2835FBConfig;
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typedef struct {
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/*< private >*/
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SysBusDevice busdev;
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/*< public >*/
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uint32_t vcram_base, vcram_size;
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MemoryRegion *dma_mr;
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AddressSpace dma_as;
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MemoryRegion iomem;
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MemoryRegionSection fbsection;
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QemuConsole *con;
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qemu_irq mbox_irq;
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bool lock, invalidate, pending;
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BCM2835FBConfig config;
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BCM2835FBConfig initial_config;
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} BCM2835FBState;
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void bcm2835_fb_reconfigure(BCM2835FBState *s, BCM2835FBConfig *newconfig);
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/**
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* bcm2835_fb_get_pitch: return number of bytes per line of the framebuffer
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* @config: configuration info for the framebuffer
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*
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* Return the number of bytes per line of the framebuffer, ie the number
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* that must be added to a pixel address to get the address of the pixel
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* directly below it on screen.
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*/
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static inline uint32_t bcm2835_fb_get_pitch(BCM2835FBConfig *config)
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{
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return config->xres * (config->bpp >> 3);
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}
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/**
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* bcm2835_fb_get_size: return total size of framebuffer in bytes
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* @config: configuration info for the framebuffer
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*/
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static inline uint32_t bcm2835_fb_get_size(BCM2835FBConfig *config)
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{
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return config->yres * bcm2835_fb_get_pitch(config);
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}
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#endif
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