/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Adam Glass and Gordon W. Ross.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/
/*
* We need control over the order of attachment on OBIO,
* so do "direct" style autoconfiguration with addresses
* from the list below. OBIO addresses are fixed forever.
*
* Warning: This whole list is very carefully ordered!
* In general, anything not already shown here should
* be added at or near the end.
*/
static paddr_t obio_alist[] = {
/* This is used by the Ethernet and SCSI drivers. */
OBIO_IOMMU,
/* Misc. registers - needed by many things */
OBIO_ENABLEREG,
OBIO_BUSERRREG,
OBIO_DIAGREG, /* leds.c */
OBIO_IDPROM1, /* idprom.c (3/470) */
OBIO_MEMREG, /* memerr.c */
OBIO_INTERREG, /* intreg.c */
/* Zilog UARTs */
OBIO_ZS_KBD_MS,
OBIO_ZS_TTY_AB,
/* eeprom.c */
OBIO_EEPROM,
/* Note: This must come after OBIO_IDPROM1. */
OBIO_IDPROM2, /* idprom.c (3/80) */
/* Note: Must probe for the Intersil first! */
OBIO_CLOCK1, /* clock.c (3/470) */
OBIO_CLOCK2, /* clock.c (3/80) */
OBIO_INTEL_ETHER,
OBIO_LANCE_ETHER,
/* Need esp DMA before SCSI. */
OBIO_EMULEX_DMA, /* 3/80 only */
OBIO_EMULEX_SCSI, /* 3/80 only */
oba = *ca;
oba.ca_bustag = &obio_space_tag;
oba.ca_dmatag = &obio_dma_tag;
/* Configure these in the order listed above. */
for (i = 0; i < OBIO_ALIST_LEN; i++) {
/* Our parent set ca->ca_bustype already. */
oba.ca_paddr = obio_alist[i];
/* These are filled-in by obio_submatch. */
oba.ca_intpri = -1;
oba.ca_intvec = -1;
config_found(self, &oba, obio_print,
CFARGS(.submatch = obio_submatch));
}
}
/*
* Print out the confargs. The (parent) name is non-NULL
* when there was no match found by config_found().
*/
static int
obio_print(void *args, const char *name)
{
/* Be quiet about empty OBIO locations. */
if (name)
return QUIET;
/* Otherwise do the usual. */
return bus_print(args, name);
}
int
obio_submatch(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
{
struct confargs *ca = aux;
/*
* Note that a defaulted address locator can never match
* the value of ca->ca_paddr set by the obio_attach loop.
* Without this diagnostic, any device with a defaulted
* address locator would always be silently unmatched.
* Therefore, just disallow default addresses on OBIO.
*/
#ifdef DIAGNOSTIC
if (cf->cf_paddr == -1)
panic("%s: invalid address for: %s%d",
__func__, cf->cf_name, cf->cf_unit);
#endif
/*
* Note that obio_attach calls config_found_sm() with
* this function as the "submatch" and ca->ca_paddr
* set to each of the possible OBIO locations, so we
* want to reject any unmatched address here.
*/
if (cf->cf_paddr != ca->ca_paddr)
return 0;
/*
* Copy the locators into our confargs for the child.
* Note: ca->ca_bustype was set by our parent driver
* (mainbus) and ca->ca_paddr was set by obio_attach.
*/
ca->ca_intpri = cf->cf_intpri;
ca->ca_intvec = cf->cf_intvec;
/* Now call the match function of the potential child. */
return config_match(parent, cf, aux);
}
/*
* This is our record of "interesting" OBIO mappings that
* the PROM has left in the virtual space reserved for it.
* Each row of the array holds a virtual address and the
* physical address it maps to (if found).
*/
static struct prom_map {
paddr_t pa;
vaddr_t va;
} prom_mappings[] = {
{ OBIO_ENABLEREG, 0 }, /* regs: Sys ENA, Bus ERR, etc. */
{ OBIO_ZS_KBD_MS, 0 }, /* Keyboard and Mouse */
{ OBIO_ZS_TTY_AB, 0 }, /* Serial Ports */
{ OBIO_EEPROM, 0 }, /* EEPROM/IDPROM/clock */
};
#define PROM_MAP_CNT __arraycount(prom_mappings)
/*
* Find a virtual address for a device at physical address 'pa'.
* If one is found among the mappings already made by the PROM
* at power-up time, use it and return 0. Otherwise return errno
* as a sign that a mapping will have to be created.
*/
int
find_prom_map(paddr_t pa, bus_type_t iospace, int sz, vaddr_t *vap)
{
int i;
vsize_t off;
off = pa & PGOFSET;
pa -= off;
sz += off;
/* The saved mappings are all one page long. */
if (sz > PAGE_SIZE)
return EINVAL;
/* Linear search for it. The list is short. */
for (i = 0; i < PROM_MAP_CNT; i++) {
if (pa == prom_mappings[i].pa) {
*vap = prom_mappings[i].va + off;
return 0;
}
}
return ENOENT;
}
/*
* Search the PROM page tables for OBIO mappings that
* we would like to borrow.
*/
static void
save_prom_mappings(void)
{
int *mon_pte;
vaddr_t va;
paddr_t pa;
int i;
for (va = SUN3X_MON_KDB_BASE; va < SUN3X_MONEND;
va += PAGE_SIZE, mon_pte++) {
/* Is this a valid mapping to OBIO? */
/* XXX - Some macros would be nice... */
if ((*mon_pte & 0xF0000003) != 0x60000001)
continue;
/* Yes it is. Is this a mapping we want? */
pa = *mon_pte & MMU_SHORT_PTE_BASEADDR;
for (i = 0; i < PROM_MAP_CNT; i++) {
if (pa != prom_mappings[i].pa)
continue;
/* Yes, we want it. Save the va? */
if (prom_mappings[i].va == 0) {
prom_mappings[i].va = va;
}
}
}
}
/*
* These are all the OBIO address that are required early in
* the life of the kernel. All are less than one page long.
* This function should make any required mappings that we
* were not able to find among the PROM monitor's mappings.
*/
static void
make_required_mappings(void)
{
int i;
for (i = 0; i < PROM_MAP_CNT; i++) {
if (prom_mappings[i].va == 0) {
/*
* Actually, the PROM always has all the
* "required" mappings we need, (smile)
* but this makes sure that is true.
*/
mon_printf("obio: no mapping for pa=0x%x\n",
prom_mappings[i].pa);
sunmon_abort(); /* Ancient PROM? */
}
}
}
/*
* Find mappings for devices that are needed before autoconfiguration.
* We first look for and record any useful PROM mappings, then call
* the "init" functions for drivers that we need to use before the
* normal autoconfiguration calls configure(). Warning: this is
* called before pmap_bootstrap, so no allocation allowed!
*/
void
obio_init(void)
{
save_prom_mappings();
make_required_mappings();
enable_init();
/*
* Find the interrupt reg mapping and turn off the
* interrupts, otherwise the PROM clock interrupt
* would poll the zs and toggle some LEDs...
*/
intreg_init();
}
