/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/vmware/svga_limits.h,v 1.2 2002/10/16 22:12:53 alanh Exp $ */ /* ********************************************************** * Copyright (C) 1998-2001 VMware, Inc. * All Rights Reserved * $Id: svga_limits.h,v 1.10 2002/06/26 22:26:22 tonyc Exp $ * **********************************************************/ /* * svga_limits.h -- * * SVGA limits */ #ifndef _SVGA_LIMITS_H_ #define _SVGA_LIMITS_H_ #define INCLUDE_ALLOW_USERLEVEL #define INCLUDE_ALLOW_MONITOR #include "includeCheck.h" /* * Location and size of SVGA frame buffer and the FIFO. */ #define SVGA_VRAM_SIZE (16*1024*1024) #define SVGA_MEM_SIZE (256*1024) /* * SVGA_FB_START is the default starting address of the SVGA frame * buffer in the guest's physical address space. * SVGA_FB_START_BIGMEM is the starting address of the SVGA frame * buffer for VMs that have a large amount of physical memory. * * The address of SVGA_FB_START is set to 2GB - (SVGA_FB_MAX_SIZE + SVGA_MEM_SIZE), * thus the SVGA frame buffer sits at [SVGA_FB_START .. 2GB-1] in the * physical address space. Our older SVGA drivers for NT treat the * address of the frame buffer as a signed integer. For backwards * compatibility, we keep the default location of the frame buffer * at under 2GB in the address space. This restricts VMs to have "only" * up to ~2031MB (i.e., up to SVGA_FB_START) of physical memory. * * For VMs that want more memory than the ~2031MB, we place the SVGA * frame buffer at SVGA_FB_START_BIGMEM. This allows VMs to have up * to 3584MB, at least as far as the SVGA frame buffer is concerned * (note that there may be other issues that limit the VM memory * size). PCI devices use high memory addresses, so we have to put * SVGA_FB_START_BIGMEM low enough so that it doesn't overlap with any * of these devices. Placing SVGA_FB_START_BIGMEM at 0xE0000000 * should leave plenty of room for the PCI devices. * * NOTE: All of that is only true for the 0710 chipset. As of the 0405 * chipset, the framebuffer start is determined solely based on the value * the guest BIOS or OS programs into the PCI base address registers. */ #define SVGA_FB_LEGACY_START 0x7EFC0000 #define SVGA_FB_LEGACY_START_BIGMEM 0xE0000000 #endif