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1ed96bfbf8
Legacy VGA & VBE interface as a common interface is supported by many legacy and modern OS. Many installer of OS distribution use this interface to display the GUI of installer when setup a refresh new installation on bare-metal. Besides, Windows OS always use this interface to display it's BSOD, recovery mode & safe mode GUI. It is need because Windows don't include virtio-gpu driver as their in-box driver, VGA interface will be used before the virtio-gpu driver been installed. To be compatiable with the PCI bar layout of legacy VGA, the layout is refined to meet with the requirement of legacy VGA and modern virtio-gpu. BAR0: VGA Framebuffer memory, 16 MB in size. BAR2: MMIO Space [0x0000~0x03ff] EDID data blob [0x0400~0x041f] VGA ioports registers [0x0500~0x0516] bochs display interface registers [0x1000~0x17ff] Virtio common configuration registers [0x1800~0x1fff] Virtio ISR state registers [0x2000~0x2fff] Virtio device configuration registers [0x3000~0x3fff] Virtio notification registers BAR4: MSI/MSI-X BAR5: Virtio port io Tracked-On: #7210 Signed-off-by: Sun Peng <peng.p.sun@linux.intel.com> Reviewed-by: Zhao, yakui <yakui.zhao@intel.com> Acked-by: Wang, Yu1 <yu1.wang@intel.com>