/*
* Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
* Copyright (c) 1994 Charles M. Hannum. 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Charles M. Hannum.
* 4. 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.
*/
/*
* Machine-specific functions for PCI autoconfiguration.
*
* On PCs, there are two methods of generating PCI configuration cycles.
* We try to detect the appropriate mechanism for this machine and set
* up a few function pointers to access the correct method directly.
*
* The configuration method can be hard-coded in the config file by
* using `options PCI_CONF_MODE=N', where `N' is the configuration mode
* as defined section 3.6.4.1, `Generating Configuration Cycles'.
*/
/*
* Address conversion as seen from a PCI master.
* XXX Shouldn't use 0x80000000, the actual value
* should come from the BAR.
*/
#define PHYS_TO_PCI_MEM(x) ((x) + 0x80000000)
#define PCI_MEM_TO_PHYS(x) ((x) - 0x80000000)
/* the following two lines are required because unlike other ports,
* we cannot just add PHYS_TO_BUS_MEM/BUS_MEM_TO_PHYS defines to
* bus.h, because it would impact other evbppc ports.
*/
pci_bus_dma_tag._dma_phys_to_bus_mem = phys_to_pci;
pci_bus_dma_tag._dma_bus_mem_to_phys = pci_to_phys;
}
static bus_addr_t
phys_to_pci(bus_dma_tag_t t, bus_addr_t a)
{
return PHYS_TO_PCI_MEM(a);
}
static bus_addr_t pci_to_phys(bus_dma_tag_t t, bus_addr_t a)
{
return PCI_MEM_TO_PHYS(a);
}
int
pmppc_pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp)
{
int pin = pa->pa_intrpin;
int line = pa->pa_intrline;
if (pin == 0) {
/* No IRQ used. */
goto bad;
}
if (pin > 4) {
printf("pci_intr_map: bad interrupt pin %d\n", pin);
goto bad;
}
if (line == 255) {
printf("pci_intr_map: no mapping for pin %c\n", '@' + pin);
goto bad;
}
/*printf("pci_intr_map pin=%d line=%d\n", pin, line);*/
switch (line & 3) { /* XXX what should this be? */
case 0: *ihp = PMPPC_I_BPMC_INTA; break;
case 1: *ihp = PMPPC_I_BPMC_INTB; break;
case 2: *ihp = PMPPC_I_BPMC_INTC; break;
case 3: *ihp = PMPPC_I_BPMC_INTD; break;
}
return 0;
bad:
*ihp = -1;
return 1;
}
void
pmppc_pci_conf_interrupt(void *v, int bus, int dev, int pin, int swiz,
int *iline)
{
int line;
line = (swiz + dev) & 3;
/* XXX UGLY UGLY, figure out the real interrupt mapping */
if (bus==3&&dev==2&&pin==1&&swiz==3) line=2;
/*
printf("pci_conf_interrupt: bus=%d dev=%d pin=%d swiz=%d => line=%d\n",
bus, dev, pin, swiz, line);
*/
*iline = line;
}
