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authorse <se@FreeBSD.org>1995-02-01 22:56:55 +0000
committerse <se@FreeBSD.org>1995-02-01 22:56:55 +0000
commit225796944421f99919e667b94f9918385a683056 (patch)
treec1f8bac4d740c5560bfb04f43a0d53abeefbaf02 /sys/pci/pcivar.h
parentdded5eaf51629224d34e43db5e6f2812fd497d2a (diff)
downloadFreeBSD-src-225796944421f99919e667b94f9918385a683056.zip
FreeBSD-src-225796944421f99919e667b94f9918385a683056.tar.gz
Reviewed by: se
Submitted by: wolf (Wolfgang Stanglmeier) Files moved here from sys/i386/pci, since they are meant to be architecture independent.
Diffstat (limited to 'sys/pci/pcivar.h')
-rw-r--r--sys/pci/pcivar.h242
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diff --git a/sys/pci/pcivar.h b/sys/pci/pcivar.h
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+/**************************************************************************
+**
+** $Id: pcireg.h,v 1.2 1994/11/02 23:47:14 se Exp $
+**
+** Declarations for pci device drivers.
+**
+** 386bsd / FreeBSD
+**
+**-------------------------------------------------------------------------
+**
+** Copyright (c) 1994 Wolfgang Stanglmeier. All rights reserved.
+**
+** Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions
+** are met:
+** 1. Redistributions of source code must retain the above copyright
+** notice, this list of conditions and the following disclaimer.
+** 2. Redistributions in binary form must reproduce the above copyright
+** notice, this list of conditions and the following disclaimer in the
+** documentation and/or other materials provided with the distribution.
+** 3. The name of the author may not be used to endorse or promote products
+** derived from this software without specific prior written permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+**
+***************************************************************************
+*/
+
+#ifndef __PCI_VAR_H__
+#define __PCI_VAR_H__
+
+/*-----------------------------------------------------------------
+**
+** main pci initialization function.
+** called at boot time from autoconf.c
+**
+**-----------------------------------------------------------------
+*/
+
+void pci_configure (void);
+
+/*-----------------------------------------------------------------
+**
+** The pci configuration id describes a pci device on the bus.
+** It is constructed from: bus, device & function numbers.
+**
+**-----------------------------------------------------------------
+*/
+
+typedef union {
+ u_long cfg1;
+ struct {
+ u_char enable;
+ u_char forward;
+ u_short port;
+ } cfg2;
+ } pcici_t;
+
+/*-----------------------------------------------------------------
+**
+** Each pci device has an unique device id.
+** It is used to find a matching driver.
+**
+**-----------------------------------------------------------------
+*/
+
+typedef u_long pcidi_t;
+
+/*-----------------------------------------------------------------
+**
+** The following functions are provided for the device driver
+** to read/write the configuration space.
+**
+** pci_conf_read():
+** Read a long word from the pci configuration space.
+** Requires a tag (from pcitag) and the register
+** number (should be a long word alligned one).
+**
+** pci_conf_write():
+** Writes a long word to the pci configuration space.
+** Requires a tag (from pcitag), the register number
+** (should be a long word alligned one), and a value.
+**
+**-----------------------------------------------------------------
+*/
+
+u_long pci_conf_read (pcici_t tag, u_long reg );
+
+void pci_conf_write (pcici_t tag, u_long reg, u_long data);
+
+/*-----------------------------------------------------------------
+**
+** The pci driver structure.
+**
+** name: The short device name.
+**
+** probe: Checks if the driver can support a device
+** with this type. The tag may be used to get
+** more info with pci_read_conf(). See below.
+** It returns a string with the devices name,
+** or a NULL pointer, if the driver cannot
+** support this device.
+**
+** attach: Allocate a control structure and prepare
+** it. This function may use the pci mapping
+** functions. See below.
+** (configuration id) or type.
+**
+** count: A pointer to a unit counter.
+** It's used by the pci configurator to
+** allocate unit numbers.
+**
+**-----------------------------------------------------------------
+*/
+
+struct pci_device {
+ char* pd_name;
+ char* (*pd_probe ) (pcici_t tag, pcidi_t type);
+ void (*pd_attach) (pcici_t tag, int unit);
+ u_long *pd_count;
+};
+
+/*-----------------------------------------------------------------
+**
+** This table includes pointers to all pci device drivers.
+** It should be generated by the linker.
+**
+**-----------------------------------------------------------------
+*/
+
+extern struct linker_set pcidevice_set;
+
+/*-----------------------------------------------------------------
+**
+** The pci-devconf interface.
+**
+**-----------------------------------------------------------------
+*/
+
+struct pci_info {
+ u_short pi_bus;
+ u_short pi_device;
+};
+
+#define PCI_EXT_CONF_LEN (16)
+#define PCI_EXTERNAL_LEN (sizeof(struct pci_externalize_buffer))
+
+struct pci_externalize_buffer {
+ struct pci_info peb_pci_info;
+ u_long peb_config[PCI_EXT_CONF_LEN];
+};
+
+
+/*-----------------------------------------------------------------
+**
+** Map a pci device to physical and virtual memory.
+**
+** The va and pa addresses are "in/out" parameters.
+** If they are 0 on entry, the function assigns an address.
+**
+** Entry selects the register in the pci configuration
+** space, which supplies the size of the region, and
+** receives the physical address.
+**
+** If there is any error, a message is written, and
+** the function returns with zero.
+** Else it returns with a value different to zero.
+**
+**-----------------------------------------------------------------
+*/
+
+int pci_map_mem (pcici_t tag, u_long entry, u_long * va, u_long * pa);
+
+/*-----------------------------------------------------------------
+**
+** Map a pci device to an io port area.
+**
+** *pa is an "in/out" parameter.
+** If it's 0 on entry, the function assigns an port number..
+**
+** Entry selects the register in the pci configuration
+** space, which supplies the size of the region, and
+** receives the port number.
+**
+** If there is any error, a message is written, and
+** the function returns with zero.
+** Else it returns with a value different to zero.
+**
+**-----------------------------------------------------------------
+*/
+
+int pci_map_port(pcici_t tag, u_long entry, u_short * pa);
+
+/*-----------------------------------------------------------------
+**
+** Map a pci interrupt to an isa irq line,
+** and enable the interrupt.
+**
+** func is the interrupt handler, arg is the argument
+** to this function.
+**
+** The maskptr argument should be &bio_imask,
+** &net_imask etc. or NULL.
+**
+** If there is any error, a message is written, and
+** the function returns with zero.
+** Else it returns with a value different to zero.
+**
+** A word of caution for FreeBSD 2.0:
+**
+** We use the register_intr() function.
+**
+** The interrupt line of the selected device is included
+** into the supplied mask: after the corresponding splXXX
+** this drivers interrupts are blocked.
+**
+** But in the interrupt handlers startup code ONLY
+** the interrupt of the driver is blocked, and NOT
+** all interrupts of the spl group.
+**
+** It may be required to additional block the group
+** interrupts by splXXX() inside the interrupt handler.
+**
+** In pre 2.0 kernels we emulate the register_intr
+** function. The emulating function blocks all interrupts
+** of the group in the interrupt handler prefix code.
+**
+**-----------------------------------------------------------------
+*/
+
+int pci_map_int (pcici_t tag, int (*func)(), void* arg, unsigned * maskptr);
+
+#endif
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