183 lines
5.3 KiB
C
183 lines
5.3 KiB
C
/*
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* Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009
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* The President and Fellows of Harvard College.
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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. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _LAMEBUS_H_
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#define _LAMEBUS_H_
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#include <cpu.h>
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#include <spinlock.h>
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/*
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* Linear Always Mapped Extents
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*
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* Machine-independent definitions.
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*/
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/* Vendors */
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#define LB_VENDOR_CS161 1
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/* CS161 devices */
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#define LBCS161_UPBUSCTL 1
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#define LBCS161_TIMER 2
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#define LBCS161_DISK 3
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#define LBCS161_SERIAL 4
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#define LBCS161_SCREEN 5
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#define LBCS161_NET 6
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#define LBCS161_EMUFS 7
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#define LBCS161_TRACE 8
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#define LBCS161_RANDOM 9
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#define LBCS161_MPBUSCTL 10
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/* LAMEbus controller always goes in slot 31 */
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#define LB_CONTROLLER_SLOT 31
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/* Number of slots */
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#define LB_NSLOTS 32
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/* LAMEbus controller per-slot config space */
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#define LB_CONFIG_SIZE 1024
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/* LAMEbus controller per-cpu control space */
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#define LB_CTLCPU_SIZE 1024
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/* LAMEbus controller slot offset to per-cpu control space */
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#define LB_CTLCPU_OFFSET 32768
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/* LAMEbus mapping size per slot */
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#define LB_SLOT_SIZE 65536
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/* Pointer to kind of function called on interrupt */
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typedef void (*lb_irqfunc)(void *devdata);
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/*
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* Driver data
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*/
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struct lamebus_softc {
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struct spinlock ls_lock;
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/* Accessed from interrupts; synchronized with ls_lock */
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uint32_t ls_slotsinuse;
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void *ls_devdata[LB_NSLOTS];
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lb_irqfunc ls_irqfuncs[LB_NSLOTS];
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/* Read-only once set early in boot */
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unsigned ls_uniprocessor;
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};
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/*
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* Allocate and set up a lamebus_softc for the system.
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*/
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struct lamebus_softc *lamebus_init(void);
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/*
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* Search for and create cpu structures for the CPUs on the mainboard.
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*/
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void lamebus_find_cpus(struct lamebus_softc *lamebus);
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/*
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* Start up secondary CPUs.
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*/
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void lamebus_start_cpus(struct lamebus_softc *lamebus);
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/*
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* Look for a not-in-use slot containing a device whose vendor and device
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* ids match those provided, and whose version is in the range between
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* lowver and highver, inclusive.
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*
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* Returns a slot number (0-31) or -1 if no such device is found.
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*/
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int lamebus_probe(struct lamebus_softc *,
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uint32_t vendorid, uint32_t deviceid,
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uint32_t lowver, uint32_t *version_ret);
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/*
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* Mark a slot in-use (that is, has a device driver attached to it),
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* or unmark it. It is a fatal error to mark a slot that is already
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* in use, or unmark a slot that is not in use.
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*/
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void lamebus_mark(struct lamebus_softc *, int slot);
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void lamebus_unmark(struct lamebus_softc *, int slot);
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/*
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* Attach to an interrupt.
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*/
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void lamebus_attach_interrupt(struct lamebus_softc *, int slot,
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void *devdata,
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void (*irqfunc)(void *devdata));
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/*
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* Detach from interrupt.
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*/
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void lamebus_detach_interrupt(struct lamebus_softc *, int slot);
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/*
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* Mask/unmask an interrupt.
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*/
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void lamebus_mask_interrupt(struct lamebus_softc *, int slot);
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void lamebus_unmask_interrupt(struct lamebus_softc *, int slot);
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/*
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* Function to call to handle a LAMEbus interrupt.
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*/
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void lamebus_interrupt(struct lamebus_softc *);
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/*
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* Have the LAMEbus controller power the system off.
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*/
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void lamebus_poweroff(struct lamebus_softc *);
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/*
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* Ask the bus controller how much memory we have.
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*/
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size_t lamebus_ramsize(void);
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/*
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* Turn on or off the inter-processor interrupt line to a CPU.
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*/
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void lamebus_assert_ipi(struct lamebus_softc *, struct cpu *targetcpu);
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void lamebus_clear_ipi(struct lamebus_softc *, struct cpu *targetcpu);
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/*
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* Read/write 32-bit register at offset OFFSET within slot SLOT.
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* (Machine dependent.)
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*/
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uint32_t lamebus_read_register(struct lamebus_softc *, int slot,
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uint32_t offset);
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void lamebus_write_register(struct lamebus_softc *, int slot,
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uint32_t offset, uint32_t val);
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/*
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* Map a buffer that starts at offset OFFSET within slot SLOT.
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*/
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void *lamebus_map_area(struct lamebus_softc *, int slot,
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uint32_t offset);
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#endif /* _LAMEBUS_H_ */
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