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/*-
* Copyright (C) 1996 Wolfgang Solfrank.
* Copyright (C) 1996 TooLs GmbH.
* 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 TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
*
* $NetBSD: ofw_machdep.c,v 1.5 2000/05/23 13:25:43 tsubai Exp $
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/disk.h>
#include <sys/fcntl.h>
#include <sys/malloc.h>
#include <sys/stat.h>
#include <net/ethernet.h>
#include <dev/ofw/openfirm.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/vm_page.h>
#include <machine/powerpc.h>
#include <machine/ofw_machdep.h>
#include <powerpc/ofw/ofw_pci.h>
#define OFMEM_REGIONS 32
static struct mem_region OFmem[OFMEM_REGIONS + 1], OFavail[OFMEM_REGIONS + 3];
static struct mem_region OFfree[OFMEM_REGIONS + 3];
extern long ofmsr;
extern struct pmap ofw_pmap;
extern int pmap_bootstrapped;
static int (*ofwcall)(void *);
/*
* Memory region utilities: determine if two regions overlap,
* and merge two overlapping regions into one
*/
static int
memr_overlap(struct mem_region *r1, struct mem_region *r2)
{
if ((r1->mr_start + r1->mr_size) < r2->mr_start ||
(r2->mr_start + r2->mr_size) < r1->mr_start)
return (FALSE);
return (TRUE);
}
static void
memr_merge(struct mem_region *from, struct mem_region *to)
{
int end;
end = imax(to->mr_start + to->mr_size, from->mr_start + from->mr_size);
to->mr_start = imin(from->mr_start, to->mr_start);
to->mr_size = end - to->mr_start;
}
/*
* This is called during powerpc_init, before the system is really initialized.
* It shall provide the total and the available regions of RAM.
* Both lists must have a zero-size entry as terminator.
* The available regions need not take the kernel into account, but needs
* to provide space for two additional entry beyond the terminating one.
*/
void
mem_regions(struct mem_region **memp, int *memsz,
struct mem_region **availp, int *availsz)
{
int phandle;
int asz, msz, fsz;
int i, j;
int still_merging;
/*
* Get memory.
*/
if ((phandle = OF_finddevice("/memory")) == -1
|| (msz = OF_getprop(phandle, "reg",
OFmem, sizeof OFmem[0] * OFMEM_REGIONS))
<= 0
|| (asz = OF_getprop(phandle, "available",
OFavail, sizeof OFavail[0] * OFMEM_REGIONS))
<= 0)
panic("no memory?");
*memp = OFmem;
*memsz = msz / sizeof(struct mem_region);
/*
* OFavail may have overlapping regions - collapse these
* and copy out remaining regions to OFfree
*/
asz /= sizeof(struct mem_region);
do {
still_merging = FALSE;
for (i = 0; i < asz; i++) {
if (OFavail[i].mr_size == 0)
continue;
for (j = i+1; j < asz; j++) {
if (OFavail[j].mr_size == 0)
continue;
if (memr_overlap(&OFavail[j], &OFavail[i])) {
memr_merge(&OFavail[j], &OFavail[i]);
/* mark inactive */
OFavail[j].mr_size = 0;
still_merging = TRUE;
}
}
}
} while (still_merging == TRUE);
/* evict inactive ranges */
for (i = 0, fsz = 0; i < asz; i++) {
if (OFavail[i].mr_size != 0) {
OFfree[fsz] = OFavail[i];
fsz++;
}
}
*availp = OFfree;
*availsz = fsz;
}
void
set_openfirm_callback(int (*openfirm)(void *))
{
ofwcall = openfirm;
}
int
openfirmware(void *args)
{
long oldmsr;
int result;
u_int srsave[16];
u_int i;
__asm __volatile( "\t"
"sync\n\t"
"mfmsr %0\n\t"
"mtmsr %1\n\t"
"isync\n"
: "=r" (oldmsr)
: "r" (ofmsr)
);
if (pmap_bootstrapped) {
/*
* Swap the kernel's address space with Open Firmware's
*/
for (i = 0; i < 16; i++) {
srsave[i] = mfsrin(i << ADDR_SR_SHFT);
mtsrin(i << ADDR_SR_SHFT, ofw_pmap.pm_sr[i]);
}
/*
* Clear battable[] translations
*/
__asm __volatile("mtdbatu 2, %0\n"
"mtdbatu 3, %0" : : "r" (0));
isync();
}
result = ofwcall(args);
if (pmap_bootstrapped) {
/*
* Restore the kernel's addr space. The isync() doesn;t
* work outside the loop unless mtsrin() is open-coded
* in an asm statement :(
*/
for (i = 0; i < 16; i++) {
mtsrin(i << ADDR_SR_SHFT, srsave[i]);
isync();
}
}
__asm( "\t"
"mtmsr %0\n\t"
"isync\n"
: : "r" (oldmsr)
);
return (result);
}
void
OF_halt()
{
int retval; /* dummy, this may not be needed */
OF_interpret("shut-down", 1, &retval);
for (;;); /* just in case */
}
void
OF_reboot()
{
int retval; /* dummy, this may not be needed */
OF_interpret("reset-all", 1, &retval);
for (;;); /* just in case */
}
void
OF_getetheraddr(device_t dev, u_char *addr)
{
phandle_t node;
node = ofw_pci_find_node(dev);
OF_getprop(node, "local-mac-address", addr, ETHER_ADDR_LEN);
}
int
mem_valid(vm_offset_t addr, int len)
{
int i;
for (i = 0; i < OFMEM_REGIONS; i++)
if ((addr >= OFmem[i].mr_start)
&& (addr + len < OFmem[i].mr_start + OFmem[i].mr_size))
return (0);
return (EFAULT);
}
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