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9a52756044
Effectively all i386 kernels now have two pmaps compiled in: one managing PAE pagetables, and another non-PAE. The implementation is selected at cold time depending on the CPU features. The vm_paddr_t is always 64bit now. As result, nx bit can be used on all capable CPUs. Option PAE only affects the bus_addr_t: it is still 32bit for non-PAE configs, for drivers compatibility. Kernel layout, esp. max kernel address, low memory PDEs and max user address (same as trampoline start) are now same for PAE and for non-PAE regardless of the type of page tables used. Non-PAE kernel (when using PAE pagetables) can handle physical memory up to 24G now, larger memory requires re-tuning the KVA consumers and instead the code caps the maximum at 24G. Unfortunately, a lot of drivers do not use busdma(9) properly so by default even 4G barrier is not easy. There are two tunables added: hw.above4g_allow and hw.above24g_allow, the first one is kept enabled for now to evaluate the status on HEAD, second is only for dev use. i386 now creates three freelists if there is any memory above 4G, to allow proper bounce pages allocation. Also, VM_KMEM_SIZE_SCALE changed from 3 to 1. The PAE_TABLES kernel config option is retired. In collaboarion with: pho Discussed with: emaste Reviewed by: markj MFC after: 2 weeks Sponsored by: The FreeBSD Foundation Differential revision: https://reviews.freebsd.org/D18894
102 lines
3.9 KiB
C
102 lines
3.9 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer as
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* the first lines of this file unmodified.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _DEV_FB_VGAREG_H_
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#define _DEV_FB_VGAREG_H_
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/* physical addresses */
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#define MDA_BUF_BASE 0xb0000
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#define MDA_BUF_SIZE 0x08000
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#define MDA_BUF BIOS_PADDRTOVADDR(MDA_BUF_BASE)
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#define CGA_BUF_BASE 0xb8000
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#define CGA_BUF_SIZE 0x08000
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#define CGA_BUF BIOS_PADDRTOVADDR(CGA_BUF_BASE)
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#define EGA_BUF_BASE 0xa0000
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#define EGA_BUF_SIZE 0x20000
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#define EGA_BUF BIOS_PADDRTOVADDR(EGA_BUF_BASE)
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#define GRAPHICS_BUF_BASE 0xa0000
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#define GRAPHICS_BUF_SIZE 0x10000
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#define GRAPHICS_BUF BIOS_PADDRTOVADDR(GRAPHICS_BUF_BASE)
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#define FONT_BUF BIOS_PADDRTOVADDR(GRAPHICS_BUF_BASE)
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#define VIDEO_BUF_BASE 0xa0000
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#define VIDEO_BUF_SIZE 0x20000
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/* I/O port addresses */
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#define MONO_CRTC (IO_MDA + 0x04) /* crt controller base mono */
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#define COLOR_CRTC (IO_CGA + 0x04) /* crt controller base color */
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#define MISC (IO_VGA + 0x02) /* misc output register */
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#define ATC (IO_VGA + 0x00) /* attribute controller */
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#define TSIDX (IO_VGA + 0x04) /* timing sequencer idx */
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#define TSREG (IO_VGA + 0x05) /* timing sequencer data */
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#define PIXMASK (IO_VGA + 0x06) /* pixel write mask */
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#define PALRADR (IO_VGA + 0x07) /* palette read address */
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#define PALWADR (IO_VGA + 0x08) /* palette write address */
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#define PALDATA (IO_VGA + 0x09) /* palette data register */
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#define GDCIDX (IO_VGA + 0x0E) /* graph data controller idx */
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#define GDCREG (IO_VGA + 0x0F) /* graph data controller data */
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#define VGA_DRIVER_NAME "vga"
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#define VGA_UNIT(dev) dev2unit(dev)
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#define VGA_MKMINOR(unit) (unit)
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#ifdef _KERNEL
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struct video_adapter;
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typedef struct vga_softc {
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struct video_adapter *adp;
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void *state_buf;
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void *pal_buf;
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#ifdef FB_INSTALL_CDEV
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genfb_softc_t gensc;
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#endif
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} vga_softc_t;
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int vga_probe_unit(int unit, struct video_adapter *adp, int flags);
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int vga_attach_unit(int unit, vga_softc_t *sc, int flags);
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#ifdef FB_INSTALL_CDEV
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int vga_open(struct cdev *dev, vga_softc_t *sc, int flag, int mode,
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struct thread *td);
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int vga_close(struct cdev *dev, vga_softc_t *sc, int flag, int mode,
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struct thread *td);
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int vga_read(struct cdev *dev, vga_softc_t *sc, struct uio *uio, int flag);
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int vga_write(struct cdev *dev, vga_softc_t *sc, struct uio *uio, int flag);
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int vga_ioctl(struct cdev *dev, vga_softc_t *sc, u_long cmd, caddr_t arg,
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int flag, struct thread *td);
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int vga_mmap(struct cdev *dev, vga_softc_t *sc, vm_ooffset_t offset,
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vm_paddr_t *paddr, int prot, vm_memattr_t *memattr);
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#endif
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extern int (*vga_sub_configure)(int flags);
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#endif /* _KERNEL */
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#endif /* _DEV_FB_VGAREG_H_ */
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