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/* $NetBSD: lca_pci.c,v 1.1 1995/11/23 02:37:42 cgd Exp $ */
/*
* Copyright (c) 1995 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Jeffrey Hsu
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <vm/vm.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <alpha/pci/lcareg.h>
#include <alpha/pci/lcavar.h>
pci_confreg_t lca_conf_read __P((void *, pci_conftag_t, pci_confoffset_t));
void lca_conf_write __P((void *, pci_conftag_t,
pci_confoffset_t, pci_confreg_t));
int lca_find_io __P((void *, pci_conftag_t,
pci_confoffset_t, pci_iooffset_t *, pci_iosize_t *));
int lca_find_mem __P((void *, pci_conftag_t,
pci_confoffset_t, pci_moffset_t *, pci_msize_t *, int *));
__const struct pci_conf_fns lca_conf_fns = {
lca_conf_read,
lca_conf_write,
lca_find_io,
lca_find_mem,
};
pci_confreg_t
lca_conf_read(cpv, tag, offset)
void *cpv;
pci_conftag_t tag;
pci_confoffset_t offset;
{
pci_confreg_t *datap, data;
int s, secondary, ba;
int32_t old_ioc_conf; /* XXX */
u_int64_t dev_sel;
dev_sel = 1 << PCI_TAG_DEVICE(tag) + 11;
secondary = PCI_TAG_BUS(tag) != 0;
if (secondary) {
s = splhigh();
old_ioc_conf = REGVAL(LCA_IOC_CONF);
wbflush();
REGVAL(LCA_IOC_CONF) = old_ioc_conf | 0x1;
wbflush();
}
datap = (pci_confreg_t *)phystok0seg(LCA_PCI_CONF |
dev_sel << 5UL | /* XXX */
(offset & ~0x03) << 5 | /* XXX */
0 << 5 | /* XXX */
0x3 << 3); /* XXX */
data = (pci_confreg_t)-1;
if (!(ba = badaddr(datap, sizeof *datap)))
data = *datap;
if (secondary) {
wbflush();
REGVAL(LCA_IOC_CONF) = old_ioc_conf;
wbflush();
splx(s);
}
#if 0
printf("lca_conf_read: tag 0x%x, offset 0x%x -> %x @ %p%s\n", tag,
offset, data, datap, ba ? " (badaddr)" : "");
#endif
return data;
}
void
lca_conf_write(cpv, tag, offset, data)
void *cpv;
pci_conftag_t tag;
pci_confoffset_t offset;
pci_confreg_t data;
{
pci_confreg_t *datap;
int s, secondary;
int32_t old_ioc_conf; /* XXX */
int32_t dev_sel;
dev_sel = 1 << PCI_TAG_DEVICE(tag) + 11;
secondary = PCI_TAG_BUS(tag) != 0;
if (secondary) {
s = splhigh();
old_ioc_conf = REGVAL(LCA_IOC_CONF);
wbflush();
REGVAL(LCA_IOC_CONF) = old_ioc_conf | 0x1;
wbflush();
}
datap = (pci_confreg_t *)phystok0seg(LCA_PCI_CONF |
dev_sel << 5UL | /* XXX */
(offset & ~0x03) << 5 | /* XXX */
0 << 5 | /* XXX */
0x3 << 3); /* XXX */
*datap = data;
if (secondary) {
wbflush();
REGVAL(LCA_IOC_CONF) = old_ioc_conf;
wbflush();
splx(s);
}
#if 0
printf("lca_conf_write: tag 0x%x, offset 0x%x -> 0x%x @ %p\n", tag,
offset, data, datap);
#endif
}
int
lca_find_io(cpv, tag, reg, iobasep, sizep)
void *cpv;
pci_conftag_t tag;
pci_confoffset_t reg;
pci_iooffset_t *iobasep;
pci_iosize_t *sizep;
{
struct lca_config *lcp = cpv;
pci_confreg_t addrdata, sizedata;
pci_iooffset_t pci_iobase;
if (reg < PCI_MAPREG_START || reg >= PCI_MAPREG_END || (reg & 3))
panic("lca_map_io: bad request");
addrdata = PCI_CONF_READ(lcp->lc_conffns, lcp->lc_confarg, tag, reg);
PCI_CONF_WRITE(lcp->lc_conffns, lcp->lc_confarg, tag, reg, 0xffffffff);
sizedata = PCI_CONF_READ(lcp->lc_conffns, lcp->lc_confarg, tag, reg);
PCI_CONF_WRITE(lcp->lc_conffns, lcp->lc_confarg, tag, reg, addrdata);
if (PCI_MAPREG_TYPE(addrdata) == PCI_MAPREG_TYPE_MEM)
panic("lca_map_io: attempt to I/O map an memory region");
if (iobasep != NULL)
*iobasep = PCI_MAPREG_IO_ADDRESS(addrdata);
if (sizep != NULL)
*sizep = ~PCI_MAPREG_IO_ADDRESS(sizedata) + 1;
return (0);
}
int
lca_find_mem(cpv, tag, reg, paddrp, sizep, cacheablep)
void *cpv;
pci_conftag_t tag;
pci_confoffset_t reg;
pci_moffset_t *paddrp;
pci_msize_t *sizep;
int *cacheablep;
{
struct lca_config *lcp = cpv;
pci_confreg_t addrdata, sizedata;
if (reg < PCI_MAPREG_START || reg >= PCI_MAPREG_END || (reg & 3))
panic("lca_map_mem: bad request");
/*
* The PROM has mapped the device for us. We take the address
* that's been assigned to the register, and figure out what
* physical and virtual addresses go with it...
*/
addrdata = PCI_CONF_READ(lcp->lc_conffns, lcp->lc_confarg, tag, reg);
PCI_CONF_WRITE(lcp->lc_conffns, lcp->lc_confarg, tag, reg, 0xffffffff);
sizedata = PCI_CONF_READ(lcp->lc_conffns, lcp->lc_confarg, tag, reg);
PCI_CONF_WRITE(lcp->lc_conffns, lcp->lc_confarg, tag, reg, addrdata);
if (PCI_MAPREG_TYPE(addrdata) == PCI_MAPREG_TYPE_IO)
panic("lca_map_mem: attempt to memory map an I/O region");
switch (PCI_MAPREG_MEM_TYPE(addrdata)) {
case PCI_MAPREG_MEM_TYPE_32BIT:
case PCI_MAPREG_MEM_TYPE_32BIT_1M:
break;
case PCI_MAPREG_MEM_TYPE_64BIT:
/* XXX */ printf("lca_map_mem: attempt to map 64-bit region\n");
/* XXX */ break;
default:
printf("lca_map_mem: reserved mapping type\n");
return EINVAL;
}
if (paddrp != NULL)
*paddrp = PCI_MAPREG_MEM_ADDRESS(addrdata); /* PCI addr */
if (sizep != NULL)
*sizep = ~PCI_MAPREG_MEM_ADDRESS(sizedata) + 1;
if (cacheablep != NULL)
*cacheablep = PCI_MAPREG_MEM_CACHEABLE(addrdata);
return 0;
}
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