437 lines
11 KiB
C
437 lines
11 KiB
C
/*-
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* Copyright (C) 1996 Wolfgang Solfrank.
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* Copyright (C) 1996 TooLs GmbH.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by TooLs GmbH.
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* 4. The name of TooLs GmbH may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $NetBSD: ofw_machdep.c,v 1.5 2000/05/23 13:25:43 tsubai Exp $
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/disk.h>
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#include <sys/fcntl.h>
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#include <sys/malloc.h>
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#include <sys/stat.h>
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#include <net/ethernet.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/ofw_pci.h>
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <vm/vm_page.h>
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#include <machine/bus.h>
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#include <machine/md_var.h>
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#include <machine/powerpc.h>
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#include <machine/ofw_machdep.h>
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#include <powerpc/ofw/ofw_pci.h>
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#define OFMEM_REGIONS 32
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static struct mem_region OFmem[OFMEM_REGIONS + 1], OFavail[OFMEM_REGIONS + 3];
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static struct mem_region OFfree[OFMEM_REGIONS + 3];
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extern register_t ofmsr[5];
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extern struct pcpu __pcpu[MAXCPU];
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extern struct pmap ofw_pmap;
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static int (*ofwcall)(void *);
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/*
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* Saved SPRG0-3 from OpenFirmware. Will be restored prior to the callback.
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*/
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register_t ofw_sprg0_save;
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static __inline void
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ofw_sprg_prepare(void)
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{
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/*
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* Assume that interrupt are disabled at this point, or
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* SPRG1-3 could be trashed
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*/
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__asm __volatile("mfsprg0 %0\n\t"
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"mtsprg0 %1\n\t"
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"mtsprg1 %2\n\t"
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"mtsprg2 %3\n\t"
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"mtsprg3 %4\n\t"
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: "=&r"(ofw_sprg0_save)
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: "r"(ofmsr[1]),
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"r"(ofmsr[2]),
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"r"(ofmsr[3]),
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"r"(ofmsr[4]));
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}
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static __inline void
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ofw_sprg_restore(void)
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{
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/*
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* Note that SPRG1-3 contents are irrelevant. They are scratch
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* registers used in the early portion of trap handling when
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* interrupts are disabled.
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*
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* PCPU data cannot be used until this routine is called !
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*/
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__asm __volatile("mtsprg0 %0" :: "r"(ofw_sprg0_save));
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}
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/*
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* Memory region utilities: determine if two regions overlap,
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* and merge two overlapping regions into one
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*/
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static int
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memr_overlap(struct mem_region *r1, struct mem_region *r2)
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{
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if ((r1->mr_start + r1->mr_size) < r2->mr_start ||
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(r2->mr_start + r2->mr_size) < r1->mr_start)
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return (FALSE);
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return (TRUE);
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}
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static void
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memr_merge(struct mem_region *from, struct mem_region *to)
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{
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int end;
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end = imax(to->mr_start + to->mr_size, from->mr_start + from->mr_size);
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to->mr_start = imin(from->mr_start, to->mr_start);
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to->mr_size = end - to->mr_start;
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}
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/*
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* This is called during powerpc_init, before the system is really initialized.
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* It shall provide the total and the available regions of RAM.
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* Both lists must have a zero-size entry as terminator.
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* The available regions need not take the kernel into account, but needs
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* to provide space for two additional entry beyond the terminating one.
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*/
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void
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mem_regions(struct mem_region **memp, int *memsz,
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struct mem_region **availp, int *availsz)
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{
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int phandle;
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int asz, msz, fsz;
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int i, j;
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int still_merging;
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/*
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* Get memory.
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*/
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if ((phandle = OF_finddevice("/memory")) == -1
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|| (msz = OF_getprop(phandle, "reg",
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OFmem, sizeof OFmem[0] * OFMEM_REGIONS))
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<= 0
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|| (asz = OF_getprop(phandle, "available",
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OFavail, sizeof OFavail[0] * OFMEM_REGIONS))
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<= 0)
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panic("no memory?");
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*memp = OFmem;
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*memsz = msz / sizeof(struct mem_region);
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/*
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* OFavail may have overlapping regions - collapse these
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* and copy out remaining regions to OFfree
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*/
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asz /= sizeof(struct mem_region);
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do {
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still_merging = FALSE;
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for (i = 0; i < asz; i++) {
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if (OFavail[i].mr_size == 0)
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continue;
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for (j = i+1; j < asz; j++) {
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if (OFavail[j].mr_size == 0)
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continue;
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if (memr_overlap(&OFavail[j], &OFavail[i])) {
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memr_merge(&OFavail[j], &OFavail[i]);
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/* mark inactive */
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OFavail[j].mr_size = 0;
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still_merging = TRUE;
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}
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}
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}
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} while (still_merging == TRUE);
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/* evict inactive ranges */
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for (i = 0, fsz = 0; i < asz; i++) {
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if (OFavail[i].mr_size != 0) {
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OFfree[fsz] = OFavail[i];
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fsz++;
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}
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}
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*availp = OFfree;
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*availsz = fsz;
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}
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void
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set_openfirm_callback(int (*openfirm)(void *))
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{
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ofwcall = openfirm;
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}
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int
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openfirmware(void *args)
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{
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long oldmsr;
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int result;
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u_int srsave[16];
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u_int i;
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__asm __volatile( "\t"
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"sync\n\t"
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"mfmsr %0\n\t"
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"mtmsr %1\n\t"
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"isync\n"
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: "=r" (oldmsr)
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: "r" (ofmsr[0])
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);
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ofw_sprg_prepare();
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if (pmap_bootstrapped) {
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/*
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* Swap the kernel's address space with Open Firmware's
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*/
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for (i = 0; i < 16; i++) {
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srsave[i] = mfsrin(i << ADDR_SR_SHFT);
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mtsrin(i << ADDR_SR_SHFT, ofw_pmap.pm_sr[i]);
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}
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/*
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* Clear battable[] translations
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*/
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__asm __volatile("mtdbatu 2, %0\n"
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"mtdbatu 3, %0" : : "r" (0));
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isync();
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}
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result = ofwcall(args);
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if (pmap_bootstrapped) {
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/*
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* Restore the kernel's addr space. The isync() doesn;t
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* work outside the loop unless mtsrin() is open-coded
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* in an asm statement :(
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*/
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for (i = 0; i < 16; i++) {
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mtsrin(i << ADDR_SR_SHFT, srsave[i]);
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isync();
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}
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}
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ofw_sprg_restore();
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__asm( "\t"
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"mtmsr %0\n\t"
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"isync\n"
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: : "r" (oldmsr)
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);
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return (result);
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}
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void
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OF_halt()
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{
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int retval; /* dummy, this may not be needed */
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OF_interpret("shut-down", 1, &retval);
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for (;;); /* just in case */
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}
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void
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OF_reboot()
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{
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int retval; /* dummy, this may not be needed */
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OF_interpret("reset-all", 1, &retval);
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for (;;); /* just in case */
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}
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void
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OF_getetheraddr(device_t dev, u_char *addr)
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{
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phandle_t node;
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node = ofw_pci_find_node(dev);
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OF_getprop(node, "local-mac-address", addr, ETHER_ADDR_LEN);
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}
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/*
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* Return a bus handle and bus tag that corresponds to the register
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* numbered regno for the device referenced by the package handle
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* dev. This function is intended to be used by console drivers in
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* early boot only. It works by mapping the address of the device's
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* register in the address space of its parent and recursively walk
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* the device tree upward this way.
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*/
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static void
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OF_get_addr_props(phandle_t node, uint32_t *addrp, uint32_t *sizep, int *pcip)
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{
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char name[16];
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uint32_t addr, size;
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int pci, res;
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res = OF_getprop(node, "#address-cells", &addr, sizeof(addr));
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if (res == -1)
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addr = 2;
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res = OF_getprop(node, "#size-cells", &size, sizeof(size));
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if (res == -1)
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size = 1;
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pci = 0;
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if (addr == 3 && size == 2) {
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res = OF_getprop(node, "name", name, sizeof(name));
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if (res != -1) {
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name[sizeof(name) - 1] = '\0';
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pci = (strcmp(name, "pci") == 0) ? 1 : 0;
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}
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}
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if (addrp != NULL)
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*addrp = addr;
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if (sizep != NULL)
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*sizep = size;
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if (pcip != NULL)
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*pcip = pci;
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}
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int
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OF_decode_addr(phandle_t dev, int regno, bus_space_tag_t *tag,
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bus_space_handle_t *handle)
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{
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uint32_t cell[32];
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bus_addr_t addr, raddr, baddr;
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bus_size_t size, rsize;
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uint32_t c, nbridge, naddr, nsize;
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phandle_t bridge, parent;
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u_int spc, rspc;
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int pci, pcib, res;
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/* Sanity checking. */
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if (dev == 0)
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return (EINVAL);
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bridge = OF_parent(dev);
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if (bridge == 0)
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return (EINVAL);
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if (regno < 0)
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return (EINVAL);
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if (tag == NULL || handle == NULL)
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return (EINVAL);
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/* Get the requested register. */
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OF_get_addr_props(bridge, &naddr, &nsize, &pci);
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res = OF_getprop(dev, (pci) ? "assigned-addresses" : "reg",
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cell, sizeof(cell));
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if (res == -1)
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return (ENXIO);
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if (res % sizeof(cell[0]))
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return (ENXIO);
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res /= sizeof(cell[0]);
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regno *= naddr + nsize;
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if (regno + naddr + nsize > res)
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return (EINVAL);
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spc = (pci) ? cell[regno] & OFW_PCI_PHYS_HI_SPACEMASK : ~0;
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addr = 0;
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for (c = 0; c < naddr; c++)
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addr = ((uint64_t)addr << 32) | cell[regno++];
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size = 0;
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for (c = 0; c < nsize; c++)
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size = ((uint64_t)size << 32) | cell[regno++];
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/*
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* Map the address range in the bridge's decoding window as given
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* by the "ranges" property. If a node doesn't have such property
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* then no mapping is done.
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*/
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parent = OF_parent(bridge);
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while (parent != 0) {
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OF_get_addr_props(parent, &nbridge, NULL, &pcib);
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res = OF_getprop(bridge, "ranges", cell, sizeof(cell));
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if (res == -1)
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goto next;
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if (res % sizeof(cell[0]))
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return (ENXIO);
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res /= sizeof(cell[0]);
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regno = 0;
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while (regno < res) {
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rspc = (pci)
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? cell[regno] & OFW_PCI_PHYS_HI_SPACEMASK
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: ~0;
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if (rspc != spc) {
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regno += naddr + nbridge + nsize;
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continue;
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}
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raddr = 0;
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for (c = 0; c < naddr; c++)
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raddr = ((uint64_t)raddr << 32) | cell[regno++];
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rspc = (pcib)
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? cell[regno] & OFW_PCI_PHYS_HI_SPACEMASK
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: ~0;
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baddr = 0;
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for (c = 0; c < nbridge; c++)
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baddr = ((uint64_t)baddr << 32) | cell[regno++];
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rsize = 0;
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for (c = 0; c < nsize; c++)
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rsize = ((uint64_t)rsize << 32) | cell[regno++];
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if (addr < raddr || addr >= raddr + rsize)
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continue;
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addr = addr - raddr + baddr;
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if (rspc != ~0)
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spc = rspc;
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}
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next:
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bridge = parent;
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parent = OF_parent(bridge);
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OF_get_addr_props(bridge, &naddr, &nsize, &pci);
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}
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/* Default to memory mapped I/O. */
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*tag = PPC_BUS_SPACE_MEM;
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if (spc == OFW_PCI_PHYS_HI_SPACE_IO)
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*tag = PPC_BUS_SPACE_IO;
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return (bus_space_map(*tag, addr, size, 0, handle));
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}
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int
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mem_valid(vm_offset_t addr, int len)
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{
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int i;
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for (i = 0; i < OFMEM_REGIONS; i++)
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if ((addr >= OFmem[i].mr_start)
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&& (addr + len < OFmem[i].mr_start + OFmem[i].mr_size))
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return (0);
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return (EFAULT);
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}
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