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Diffstat (limited to 'sys/arch/mvme88k/dev/nvram.c')
-rw-r--r--sys/arch/mvme88k/dev/nvram.c175
1 files changed, 149 insertions, 26 deletions
diff --git a/sys/arch/mvme88k/dev/nvram.c b/sys/arch/mvme88k/dev/nvram.c
index ca4b1e2bfae..158feb78123 100644
--- a/sys/arch/mvme88k/dev/nvram.c
+++ b/sys/arch/mvme88k/dev/nvram.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: nvram.c,v 1.26 2006/04/26 21:14:00 miod Exp $ */
+/* $OpenBSD: nvram.c,v 1.27 2006/04/27 20:13:42 miod Exp $ */
/*
* Copyright (c) 1995 Theo de Raadt
@@ -25,18 +25,14 @@
* SUCH DAMAGE.
*/
-/*
- * 8/22/2000 BH Cleaned up year 2000 problems with calendar hardware.
- * This code will break again in 2068 or so - come dance on my grave.
- */
-
#include <sys/param.h>
#include <sys/kernel.h>
-#include <sys/ioctl.h>
#include <sys/device.h>
+#include <sys/malloc.h>
#include <sys/systm.h>
+#include <sys/proc.h>
+#include <sys/ioctl.h>
#include <sys/uio.h>
-#include <sys/malloc.h>
#include <machine/autoconf.h>
#include <machine/bugio.h>
@@ -59,6 +55,10 @@ struct nvramsoftc {
bus_space_handle_t sc_ioh;
bus_addr_t sc_regs;
size_t sc_len;
+
+#ifdef MVME188
+ u_int8_t *sc_nvram;
+#endif
};
void nvramattach(struct device *, struct device *, void *);
@@ -72,7 +72,9 @@ struct cfdriver nvram_cd = {
NULL, "nvram", DV_DULL
};
-u_long chiptotime(int, int, int, int, int, int);
+u_long chiptotime(int, int, int, int, int, int);
+int nvram188read(struct nvramsoftc *, struct uio *, int);
+int nvram188write(struct nvramsoftc *, struct uio *, int);
int
nvrammatch(parent, vcf, args)
@@ -100,21 +102,26 @@ nvramattach(parent, self, args)
bus_space_handle_t ioh;
vsize_t maplen;
- if (brdtyp == BRD_188) {
+ switch (brdtyp) {
+#ifdef MVME188
+ case BRD_188:
sc->sc_len = MK48T02_SIZE;
maplen = sc->sc_len * 4;
sc->sc_regs = M188_NVRAM_TOD_OFF;
- } else {
+ break;
+#endif
+ default:
sc->sc_len = MK48T08_SIZE;
maplen = sc->sc_len;
sc->sc_regs = SBC_NVRAM_TOD_OFF;
+ break;
}
sc->sc_iot = ca->ca_iot;
sc->sc_base = ca->ca_paddr;
if (bus_space_map(sc->sc_iot, sc->sc_base, round_page(maplen),
- 0, &ioh) != 0) {
+ BUS_SPACE_MAP_LINEAR, &ioh) != 0) {
printf(": can't map memory!\n");
return;
}
@@ -170,8 +177,8 @@ microtime(tvp)
* This code is defunct after 2068.
* Will Unix still be here then??
*/
-const short dayyr[12] =
-{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334};
+const int dayyr[12] =
+{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 };
u_long
chiptotime(sec, min, hour, day, mon, year)
@@ -283,7 +290,7 @@ inittodr(base)
int sec, min, hour, day, mon, year;
int badbase = 0, waszero = base == 0;
- if (base < 5 * SECYR) {
+ if (base < 35 * SECYR) {
/*
* If base is 0, assume filesystem time is just unknown
* in stead of preposterous. Don't bark.
@@ -291,7 +298,7 @@ inittodr(base)
if (base != 0)
printf("WARNING: preposterous time in file system\n");
/* not going to use it anyway, if the chip is readable */
- base = 21*SECYR + 186*SECDAY + SECDAY/2;
+ base = 36 * SECYR + 109 * SECDAY + 22 * 3600;
badbase = 1;
}
@@ -442,12 +449,6 @@ nvramopen(dev, flag, mode, p)
nvram_cd.cd_devs[minor(dev)] == NULL)
return (ENODEV);
-#ifdef MVME188
- /* for now, do not allow userland to access the nvram on 188. */
- if (brdtyp == BRD_188)
- return (ENXIO);
-#endif
-
return (0);
}
@@ -458,6 +459,9 @@ nvramclose(dev, flag, mode, p)
int flag, mode;
struct proc *p;
{
+ /*
+ * On MVME188, it might be worth free()ing the NVRAM copy here.
+ */
return (0);
}
@@ -487,14 +491,32 @@ nvramioctl(dev, cmd, data, flag, p)
/*ARGSUSED*/
int
-nvramrw(dev, uio, flags)
- dev_t dev;
- struct uio *uio;
- int flags;
+nvramread(dev_t dev, struct uio *uio, int flags)
+{
+ int unit = minor(dev);
+ struct nvramsoftc *sc = (struct nvramsoftc *)nvram_cd.cd_devs[unit];
+
+#ifdef MVME188
+ if (brdtyp == BRD_188)
+ return (nvram188read(sc, uio, flags));
+#endif
+
+ return (memdevrw(bus_space_vaddr(sc->sc_iot, sc->sc_ioh),
+ sc->sc_len, uio, flags));
+}
+
+/*ARGSUSED*/
+int
+nvramwrite(dev_t dev, struct uio *uio, int flags)
{
int unit = minor(dev);
struct nvramsoftc *sc = (struct nvramsoftc *) nvram_cd.cd_devs[unit];
+#ifdef MVME188
+ if (brdtyp == BRD_188)
+ return (nvram188write(sc, uio, flags));
+#endif
+
return (memdevrw(bus_space_vaddr(sc->sc_iot, sc->sc_ioh),
sc->sc_len, uio, flags));
}
@@ -511,8 +533,109 @@ nvrammmap(dev, off, prot)
if (minor(dev) != 0)
return (-1);
+#ifdef MVME188
+ /* disallow mmap on MVME188 due to non-linear layout */
+ if (brdtyp == BRD_188)
+ return (-1);
+#endif
+
/* allow access only in RAM */
if (off < 0 || off > sc->sc_len)
return (-1);
return (atop(sc->sc_base + off));
}
+
+#ifdef MVME188
+
+int read_nvram(struct nvramsoftc *);
+
+/*
+ * Build a local copy of the NVRAM contents.
+ */
+int
+read_nvram(struct nvramsoftc *sc)
+{
+ u_int cnt;
+ u_int8_t *dest;
+ u_int32_t *src;
+
+ if (sc->sc_nvram == NULL) {
+ sc->sc_nvram = (u_int8_t *)malloc(sc->sc_len, M_DEVBUF,
+ M_WAITOK | M_CANFAIL);
+ if (sc->sc_nvram == NULL)
+ return (EAGAIN);
+ }
+
+ dest = sc->sc_nvram;
+ src = (u_int32_t *)bus_space_vaddr(sc->sc_iot, sc->sc_ioh);
+ cnt = sc->sc_len;
+ while (cnt-- != 0)
+ *dest++ = (u_int8_t)*src++;
+
+ return (0);
+}
+
+/*
+ * Specific memdevrw wrappers to cope with the 188 design.
+ */
+
+int
+nvram188read(struct nvramsoftc *sc, struct uio *uio, int flags)
+{
+ int rc;
+
+ /*
+ * Get a copy of the NVRAM contents.
+ */
+ rc = read_nvram(sc);
+ if (rc != 0)
+ return (rc);
+
+ /*
+ * Move data from our NVRAM copy to the user.
+ */
+ return (memdevrw(sc->sc_nvram, sc->sc_len, uio, flags));
+}
+
+int
+nvram188write(struct nvramsoftc *sc, struct uio *uio, int flags)
+{
+ u_int cnt;
+ u_int8_t *src;
+ u_int32_t *dest;
+ int rc;
+
+ /*
+ * Get a copy of the NVRAM contents.
+ */
+ rc = read_nvram(sc);
+ if (rc != 0)
+ return (rc);
+
+ /*
+ * Move data from the user to our NVRAM copy.
+ */
+ rc = memdevrw(sc->sc_nvram, sc->sc_len, uio, flags);
+ if (rc != 0) {
+ /* reset NVRAM copy contents */
+ read_nvram(sc);
+ return (rc);
+ }
+
+ /*
+ * Update the NVRAM. This could be optimized by only working on
+ * the areas which have been modified by the user.
+ */
+ src = sc->sc_nvram;
+ dest = (u_int32_t *)bus_space_vaddr(sc->sc_iot, sc->sc_ioh);
+ cnt = sc->sc_len;
+ while (cnt-- != 0) {
+ if ((*dest & 0xff) != *src)
+ *dest = (u_int32_t)*src;
+ dest++;
+ src++;
+ }
+
+ return (0);
+}
+#endif
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