46bb1d3157
https://github.com/ozkl/soso + Much smaller than Linux; builds instantly + Supports graphics - No network support - Doesn't work on a cloud server (yet?)
109 lines
2.4 KiB
C
109 lines
2.4 KiB
C
#include "devfs.h"
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#include "device.h"
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#include "common.h"
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#include "gfx.h"
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#include "framebuffer.h"
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#include "vmm.h"
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#include "process.h"
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static BOOL fb_open(File *file, uint32 flags);
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static int32 fb_read(File *file, uint32 size, uint8 *buffer);
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static int32 fb_write(File *file, uint32 size, uint8 *buffer);
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static int32 fb_ioctl(File *node, int32 request, void * argp);
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static void* fb_mmap(File* file, uint32 size, uint32 offset, uint32 flags);
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static BOOL fb_munmap(File* file, void* address, uint32 size);
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static uint8* gFrameBufferPhysical = 0;
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static uint8* gFrameBufferVirtual = 0;
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void initializeFrameBuffer(uint8* p_address, uint8* v_address)
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{
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gFrameBufferPhysical = p_address;
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gFrameBufferVirtual = v_address;
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Device device;
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memset((uint8*)&device, 0, sizeof(Device));
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strcpy(device.name, "fb0");
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device.deviceType = FT_CharacterDevice;
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device.open = fb_open;
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device.read = fb_read;
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device.write = fb_write;
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device.ioctl = fb_ioctl;
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device.mmap = fb_mmap;
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device.munmap = fb_munmap;
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registerDevice(&device);
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}
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static BOOL fb_open(File *file, uint32 flags)
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{
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return TRUE;
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}
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static int32 fb_read(File *file, uint32 size, uint8 *buffer)
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{
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if (size == 0)
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{
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return 0;
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}
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return -1;
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}
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static int32 fb_write(File *file, uint32 size, uint8 *buffer)
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{
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if (size == 0)
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{
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return 0;
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}
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int32 requestedSize = size;
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int32 length = Gfx_GetWidth() * Gfx_GetHeight() * 4;
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int32 availableSize = length - file->offset;
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if (availableSize <= 0)
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{
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return -1;
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}
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int32 targetSize = MIN(requestedSize, availableSize);
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memcpy(gFrameBufferVirtual + file->offset, buffer, targetSize);
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file->offset += targetSize;
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return targetSize;
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}
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static int32 fb_ioctl(File *node, int32 request, void * argp)
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{
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int32 result = -1;
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switch (request)
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{
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case FB_GET_WIDTH:
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result = Gfx_GetWidth();
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break;
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case FB_GET_HEIGHT:
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result = Gfx_GetHeight();
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break;
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case FB_GET_BITSPERPIXEL:
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result = 32;
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break;
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}
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return result;
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}
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static void* fb_mmap(File* file, uint32 size, uint32 offset, uint32 flags)
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{
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return mapMemory(file->thread->owner, size, (uint32)(gFrameBufferPhysical + offset), NULL);
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}
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static BOOL fb_munmap(File* file, void* address, uint32 size)
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{
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return unmapMemory(file->thread->owner, size, (uint32)address);
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}
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