8c2f15c6fc
- A fixed extent map (statically allocated descriptor storage) is created in init386(), just before the call to consinit(). The fixed descriptor storage has enough room for 8 region entires, which is plenty for early initialization, but doesn't chew up that much memory. This extent map (ioport_ex) manages the i386 i/o port space (0x0 - 0xffff). - Just before the call to configure() in cpu_startup(), a flag is set which notifies the bus_io functions that it is safe to use malloc() to allocate descriptor storage, in the event that more than 8 regions are needed. - bus_io_map() attempts to allocate the specified region from ioport_ex. If the allocation succeeds, the io handle is filled in. If the allocation fails, it is implied that something else is already using that io space, and an error condition is returned. - bus_io_unmap() frees a region previously allocated from ioport_ex in bus_io_map(). If the free fails, a warning is printed on the conole. These changes implement "port accounting". This is required for proper autoconfiguration on the i386 port, and makes dealing with, among other things, PCMCIA io mappings _much_ easier.
118 lines
4.8 KiB
C
118 lines
4.8 KiB
C
/* $NetBSD: bus.h,v 1.4 1996/06/23 19:59:06 thorpej Exp $ */
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/*
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* Copyright (c) 1996 Christopher G. Demetriou. 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.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Christopher G. Demetriou
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* for the NetBSD Project.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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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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#ifndef _I386_BUS_H_
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#define _I386_BUS_H_
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#include <machine/pio.h>
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/*
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* I/O addresses (in bus space)
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*/
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typedef u_long bus_io_addr_t;
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typedef u_long bus_io_size_t;
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/*
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* Memory addresses (in bus space)
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*/
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typedef u_long bus_mem_addr_t;
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typedef u_long bus_mem_size_t;
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/*
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* Access methods for bus resources, I/O space, and memory space.
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*/
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typedef void *bus_chipset_tag_t;
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typedef u_long bus_io_handle_t;
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typedef caddr_t bus_mem_handle_t;
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int bus_io_map __P((bus_chipset_tag_t, bus_io_addr_t,
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bus_io_size_t, bus_io_handle_t *));
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void bus_io_unmap __P((bus_chipset_tag_t, bus_io_handle_t,
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bus_io_size_t));
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#define bus_io_read_1(t, h, o) ((void) t, inb((h) + (o)))
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#define bus_io_read_2(t, h, o) ((void) t, inw((h) + (o)))
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#define bus_io_read_4(t, h, o) ((void) t, inl((h) + (o)))
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#if 0 /* Cause a link error for bus_io_read_8 */
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#define bus_io_read_8(t, h, o) !!! bus_io_read_8 unimplemented !!!
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#endif
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#define bus_io_read_multi_1(t, h, o, a, c) \
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((void) t, insb((h) + (o), (a), (c)))
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#define bus_io_read_multi_2(t, h, o, a, c) \
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((void) t, insw((h) + (o), (a), (c)))
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#define bus_io_read_multi_4(t, h, o, a, c) \
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((void) t, insl((h) + (o), (a), (c)))
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#if 0 /* Cause a link error for bus_io_read_multi_8 */
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#define bus_io_read_multi_8(t, h, o, a, c) \
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!!! bus_io_read_multi_8 unimplemented !!!
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#endif
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#define bus_io_write_1(t, h, o, v) ((void) t, outb((h) + (o), (v)))
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#define bus_io_write_2(t, h, o, v) ((void) t, outw((h) + (o), (v)))
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#define bus_io_write_4(t, h, o, v) ((void) t, outl((h) + (o), (v)))
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#if 0 /* Cause a link error for bus_io_write_8 */
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#define bus_io_write_8(t, h, o, v) !!! bus_io_write_8 unimplemented !!!
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#endif
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#define bus_io_write_multi_1(t, h, o, a, c) \
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((void) t, outsb((h) + (o), (a), (c)))
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#define bus_io_write_multi_2(t, h, o, a, c) \
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((void) t, outsw((h) + (o), (a), (c)))
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#define bus_io_write_multi_4(t, h, o, a, c) \
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((void) t, outsl((h) + (o), (a), (c)))
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#if 0 /* Cause a link error for bus_io_write_multi_8 */
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#define bus_io_write_multi_8(t, h, o, a, c) \
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!!! bus_io_write_multi_8 unimplimented !!!
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#endif
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int bus_mem_map __P((bus_chipset_tag_t t, bus_mem_addr_t bpa,
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bus_mem_size_t size, int cacheable, bus_mem_handle_t *mhp));
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void bus_mem_unmap __P((bus_chipset_tag_t t, bus_mem_handle_t memh,
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bus_mem_size_t size));
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#define bus_mem_read_1(t, h, o) ((void) t, (*(volatile u_int8_t *)((h) + (o))))
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#define bus_mem_read_2(t, h, o) ((void) t, (*(volatile u_int16_t *)((h) + (o))))
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#define bus_mem_read_4(t, h, o) ((void) t, (*(volatile u_int32_t *)((h) + (o))))
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#define bus_mem_read_8(t, h, o) ((void) t, (*(volatile u_int64_t *)((h) + (o))))
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#define bus_mem_write_1(t, h, o, v) \
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((void) t, ((void)(*(volatile u_int8_t *)((h) + (o)) = (v))))
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#define bus_mem_write_2(t, h, o, v) \
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((void) t, ((void)(*(volatile u_int16_t *)((h) + (o)) = (v))))
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#define bus_mem_write_4(t, h, o, v) \
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((void) t, ((void)(*(volatile u_int32_t *)((h) + (o)) = (v))))
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#define bus_mem_write_8(t, h, o, v) \
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((void) t, ((void)(*(volatile u_int64_t *)((h) + (o)) = (v))))
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#endif /* _I386_BUS_H_ */
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