Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

obio bus driver, for dealing with devices on the sun4 motherboard.

Browse Source
This commit is contained in:
deraadt 1994-09-17 23:49:58 +00:00
parent 1340faab13
commit 152b1d19d4
1 changed files with 77 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

92
sys/arch/sparc/dev/obio.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: obio.c,v 1.1 1994/08/24 09:16:46 deraadt Exp $ */
/* $NetBSD: obio.c,v 1.2 1994/09/17 23:49:58 deraadt Exp $ */
/*
* Copyright (c) 1993, 1994 Theo de Raadt
@ -43,11 +43,10 @@
#include <machine/autoconf.h>
#include <machine/pmap.h>
struct vme_attach_args {
u_long paddr;
int irq;
};
#include <machine/oldmon.h>
#include <machine/ctlreg.h>
#include <sparc/sparc/asm.h>
#include <sparc/sparc/vaddrs.h>
struct obio_softc {
struct device sc_dev; /* base device */
@ -61,13 +60,19 @@ struct cfdriver obiocd = { NULL, "cgsix", obiomatch, obioattach,
DV_DULL, sizeof(struct obio_softc)
};
void * obio_map __P((void *, int));
void * obio_tmp_map __P((void *));
void obio_tmp_unmap __P((void));
int
obiomatch(parent, cf, args)
struct device *parent;
struct cfdata *cf;
void *args;
{
printf("obiomatch\n");
/*
* This exists for machines that don't have OpenPROM.
*/
if (cputyp != CPU_SUN4)
return 0;
return 1;
@ -78,7 +83,13 @@ obio_print(args, obio)
void *args;
char *obio;
{
printf("obio_print ");
register struct confargs *ca = args;
if (ca->ca_ra.ra_name == NULL)
ca->ca_ra.ra_name = "<unknown>";
if (obio)
printf("%s at %s", ca->ca_ra.ra_name, obio);
printf(" slot %d offset 0x%x", ca->ca_slot, ca->ca_offset);
return (UNCONF);
}
@ -87,10 +98,9 @@ obioattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
extern struct cfdata cfdata[];
register struct obio_softc *sc = (struct obio_softc *)self;
struct vme_attach_args va;
extern struct cfdata cfdata[];
struct confargs ca;
register short *p;
struct cfdata *cf;
@ -104,10 +114,62 @@ obioattach(parent, self, aux)
continue;
for (p = cf->cf_parents; *p >= 0; p++)
if (parent->dv_cfdata == &cfdata[*p]) {
va.paddr = cf->cf_loc[0];
va.irq = cf->cf_loc[1];
if ((*cf->cf_driver->cd_match)(self, cf, &va))
config_attach(self, cf, &va, NULL);
ca.ca_ra.ra_iospace = -1;
ca.ca_ra.ra_paddr = (void *)cf->cf_loc[0];
ca.ca_ra.ra_len = 0;
ca.ca_ra.ra_vaddr = obio_tmp_map(ca.ca_ra.ra_paddr);
ca.ca_ra.ra_intr[0].int_pri = cf->cf_loc[1];
ca.ca_ra.ra_intr[0].int_vec = 0;
ca.ca_ra.ra_nintr = 1;
if ((*cf->cf_driver->cd_match)(self, cf, &ca) == 0)
continue;
if (ca.ca_ra.ra_len)
ca.ca_ra.ra_vaddr =
obio_map(ca.ca_ra.ra_paddr,
ca.ca_ra.ra_len);
ca.ca_bustype = BUS_OBIO;
config_attach(self, cf, &ca, NULL);
}
}
obio_tmp_unmap();
}
#define getpte(va) lda(va, ASI_PTE)
/*
* If we can find a mapping that was established by the rom, use it.
* Else, create a new mapping.
*/
void *
obio_map(pa, len)
void *pa;
int len;
{
u_long pf = (int)pa >> PGSHIFT;
u_long va, pte;
for (va = MONSTART; va < MONEND; va += NBPG) {
pte = getpte(va);
if ((pte & PG_V) != 0 && (pte & PG_TYPE) == PG_OBIO &&
(pte & PG_PFNUM) == pf)
return ((void *)va);
}
return mapiodev(pa, len);
}
void *
obio_tmp_map(pa)
void *pa;
{
pmap_enter(kernel_pmap, TMPMAP_VA,
(vm_offset_t)pa | PMAP_OBIO | PMAP_NC,
VM_PROT_READ | VM_PROT_WRITE, 1);
return ((void *)TMPMAP_VA);
}
void
obio_tmp_unmap()
{
pmap_remove(kernel_pmap, TMPMAP_VA, TMPMAP_VA+NBPG);
}