C++ (Cpp) novm_alloc_pages примеры использования

Пример #1

Файл: page_alloc.c Проект: 0xBADCA7/lk

void *page_alloc(size_t pages, int arena)
{
#if WITH_KERNEL_VM
    void *result = pmm_alloc_kpages(pages, NULL);
    return result;
#else
    void *result = novm_alloc_pages(pages, arena);
    return result;
#endif
}

Пример #2

Файл: lcd.c Проект: david-dee/lk

/**
  * @brief  Initializes the LCD.
  * @retval LCD state
  */
uint8_t BSP_LCD_Init(void)
{
    /* Timing Configuration */
    ltdc_handle.Init.HorizontalSync = (RK043FN48H_HSYNC - 1);
    ltdc_handle.Init.VerticalSync = (RK043FN48H_VSYNC - 1);
    ltdc_handle.Init.AccumulatedHBP = (RK043FN48H_HSYNC + RK043FN48H_HBP - 1);
    ltdc_handle.Init.AccumulatedVBP = (RK043FN48H_VSYNC + RK043FN48H_VBP - 1);
    ltdc_handle.Init.AccumulatedActiveH = (RK043FN48H_HEIGHT + RK043FN48H_VSYNC + RK043FN48H_VBP - 1);
    ltdc_handle.Init.AccumulatedActiveW = (RK043FN48H_WIDTH + RK043FN48H_HSYNC + RK043FN48H_HBP - 1);
    ltdc_handle.Init.TotalHeigh = (RK043FN48H_HEIGHT + RK043FN48H_VSYNC + RK043FN48H_VBP + RK043FN48H_VFP - 1);
    ltdc_handle.Init.TotalWidth = (RK043FN48H_WIDTH + RK043FN48H_HSYNC + RK043FN48H_HBP + RK043FN48H_HFP - 1);

    /* LCD clock configuration */
    BSP_LCD_ClockConfig(&ltdc_handle, NULL);

    /* Initialize the LCD pixel width and pixel height */
    ltdc_handle.LayerCfg->ImageWidth  = RK043FN48H_WIDTH;
    ltdc_handle.LayerCfg->ImageHeight = RK043FN48H_HEIGHT;

    /* Background value */
    ltdc_handle.Init.Backcolor.Blue = 0;
    ltdc_handle.Init.Backcolor.Green = 0;
    ltdc_handle.Init.Backcolor.Red = 0;

    /* Polarity */
    ltdc_handle.Init.HSPolarity = LTDC_HSPOLARITY_AL;
    ltdc_handle.Init.VSPolarity = LTDC_VSPOLARITY_AL;
    ltdc_handle.Init.DEPolarity = LTDC_DEPOLARITY_AL;
    ltdc_handle.Init.PCPolarity = LTDC_PCPOLARITY_IPC;
    ltdc_handle.Instance = LTDC;

    if (HAL_LTDC_GetState(&ltdc_handle) == HAL_LTDC_STATE_RESET) {
        BSP_LCD_MspInit(&ltdc_handle, NULL);
    }

    HAL_LTDC_Init(&ltdc_handle);

    /* allocate the framebuffer */
    size_t fb_size_pages = PAGE_ALIGN(RK043FN48H_WIDTH * RK043FN48H_HEIGHT * 4) / PAGE_SIZE;
    void *fb_address = novm_alloc_pages(fb_size_pages, NOVM_ARENA_SECONDARY);
    if (!fb_address)
        panic("failed to allocate framebuffer for LCD\n");

    BSP_LCD_LayerDefaultInit(0, (uint32_t)fb_address);
    BSP_LCD_SelectLayer(0);

    /* clear framebuffer */
    memset((void *)ltdc_handle.LayerCfg[active_layer].FBStartAdress, 0,
           BSP_LCD_GetXSize() * BSP_LCD_GetYSize() * BSP_LCD_PixelSize());

    /* turn the display on */
    BSP_LCD_DisplayOn();
    return LCD_OK;
}