769 lines
18 KiB
C
769 lines
18 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/smp.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 <dev/ofw/ofw_bus.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/cpu.h>
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#include <machine/md_var.h>
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#include <machine/platform.h>
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#include <machine/ofw_machdep.h>
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static struct mem_region OFmem[PHYS_AVAIL_SZ], OFavail[PHYS_AVAIL_SZ];
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static struct mem_region OFfree[PHYS_AVAIL_SZ];
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extern register_t ofmsr[5];
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extern void *openfirmware_entry;
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static void *fdt;
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int ofw_real_mode;
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int ofwcall(void *);
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static void ofw_quiesce(void);
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static int openfirmware(void *args);
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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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vm_offset_t end;
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end = ulmax(to->mr_start + to->mr_size, from->mr_start + from->mr_size);
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to->mr_start = ulmin(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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* Quick sort callout for comparing memory regions.
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*/
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static int mr_cmp(const void *a, const void *b);
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static int
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mr_cmp(const void *a, const void *b)
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{
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const struct mem_region *regiona;
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const struct mem_region *regionb;
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regiona = a;
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regionb = b;
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if (regiona->mr_start < regionb->mr_start)
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return (-1);
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else if (regiona->mr_start > regionb->mr_start)
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return (1);
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else
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return (0);
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}
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static int
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parse_ofw_memory(phandle_t node, const char *prop, struct mem_region *output)
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{
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cell_t address_cells, size_cells;
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cell_t OFmem[4 * PHYS_AVAIL_SZ];
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int sz, i, j;
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int apple_hack_mode;
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phandle_t phandle;
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sz = 0;
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apple_hack_mode = 0;
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/*
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* Get #address-cells from root node, defaulting to 1 if it cannot
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* be found.
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*/
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phandle = OF_finddevice("/");
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if (OF_getprop(phandle, "#address-cells", &address_cells,
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sizeof(address_cells)) < sizeof(address_cells))
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address_cells = 1;
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if (OF_getprop(phandle, "#size-cells", &size_cells,
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sizeof(size_cells)) < sizeof(size_cells))
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size_cells = 1;
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/*
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* On Apple hardware, address_cells is always 1 for "available",
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* even when it is explicitly set to 2. Then all memory above 4 GB
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* should be added by hand to the available list. Detect Apple hardware
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* by seeing if ofw_real_mode is set -- only Apple seems to use
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* virtual-mode OF.
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*/
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if (strcmp(prop, "available") == 0 && !ofw_real_mode)
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apple_hack_mode = 1;
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if (apple_hack_mode)
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address_cells = 1;
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/*
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* Get memory.
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*/
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if (node == -1 || (sz = OF_getprop(node, prop,
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OFmem, sizeof(OFmem))) <= 0)
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panic("Physical memory map not found");
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i = 0;
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j = 0;
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while (i < sz/sizeof(cell_t)) {
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#ifndef __powerpc64__
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/* On 32-bit PPC, ignore regions starting above 4 GB */
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if (address_cells > 1 && OFmem[i] > 0) {
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i += address_cells + size_cells;
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continue;
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}
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#endif
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output[j].mr_start = OFmem[i++];
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if (address_cells == 2) {
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#ifdef __powerpc64__
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output[j].mr_start <<= 32;
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#endif
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output[j].mr_start += OFmem[i++];
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}
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output[j].mr_size = OFmem[i++];
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if (size_cells == 2) {
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#ifdef __powerpc64__
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output[j].mr_size <<= 32;
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#endif
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output[j].mr_size += OFmem[i++];
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}
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#ifndef __powerpc64__
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/*
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* Check for memory regions extending above 32-bit
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* memory space, and restrict them to stay there.
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*/
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if (((uint64_t)output[j].mr_start +
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(uint64_t)output[j].mr_size) >
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BUS_SPACE_MAXADDR_32BIT) {
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output[j].mr_size = BUS_SPACE_MAXADDR_32BIT -
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output[j].mr_start;
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}
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#endif
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j++;
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}
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sz = j*sizeof(output[0]);
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#ifdef __powerpc64__
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if (apple_hack_mode) {
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/* Add in regions above 4 GB to the available list */
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struct mem_region himem[16];
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int hisz;
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hisz = parse_ofw_memory(node, "reg", himem);
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for (i = 0; i < hisz/sizeof(himem[0]); i++) {
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if (himem[i].mr_start > BUS_SPACE_MAXADDR_32BIT) {
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output[j].mr_start = himem[i].mr_start;
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output[j].mr_size = himem[i].mr_size;
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j++;
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}
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}
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sz = j*sizeof(output[0]);
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}
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#endif
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return (sz);
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}
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static int
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parse_drconf_memory(int *msz, int *asz, struct mem_region *ofmem,
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struct mem_region *ofavail)
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{
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phandle_t phandle;
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vm_offset_t base;
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int i, idx, len, lasz, lmsz, res;
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uint32_t lmb_size[2];
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unsigned long *dmem, flags;
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lmsz = *msz;
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lasz = *asz;
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phandle = OF_finddevice("/ibm,dynamic-reconfiguration-memory");
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if (phandle == -1)
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/* No drconf node, return. */
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return (0);
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res = OF_getprop(phandle, "ibm,lmb-size", lmb_size, sizeof(lmb_size));
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if (res == -1)
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return (0);
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/* Parse the /ibm,dynamic-memory.
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The first position gives the # of entries. The next two words
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reflect the address of the memory block. The next four words are
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the DRC index, reserved, list index and flags.
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(see PAPR C.6.6.2 ibm,dynamic-reconfiguration-memory)
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#el Addr DRC-idx res list-idx flags
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-------------------------------------------------
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| 4 | 8 | 4 | 4 | 4 | 4 |....
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-------------------------------------------------
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*/
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len = OF_getproplen(phandle, "ibm,dynamic-memory");
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if (len > 0) {
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/* We have to use a variable length array on the stack
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since we have very limited stack space.
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*/
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cell_t arr[len/sizeof(cell_t)];
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res = OF_getprop(phandle, "ibm,dynamic-memory", &arr,
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sizeof(arr));
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if (res == -1)
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return (0);
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/* Number of elements */
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idx = arr[0];
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/* First address. */
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dmem = (void*)&arr[1];
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for (i = 0; i < idx; i++) {
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base = *dmem;
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dmem += 2;
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flags = *dmem;
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/* Use region only if available and not reserved. */
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if ((flags & 0x8) && !(flags & 0x80)) {
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ofmem[lmsz].mr_start = base;
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ofmem[lmsz].mr_size = (vm_size_t)lmb_size[1];
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ofavail[lasz].mr_start = base;
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ofavail[lasz].mr_size = (vm_size_t)lmb_size[1];
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lmsz++;
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lasz++;
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}
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dmem++;
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}
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}
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*msz = lmsz;
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*asz = lasz;
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return (1);
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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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ofw_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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phandle_t phandle;
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vm_offset_t maxphysaddr;
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int asz, msz, fsz;
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int i, j, res;
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int still_merging;
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char name[31];
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asz = msz = 0;
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/*
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* Get memory from all the /memory nodes.
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*/
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for (phandle = OF_child(OF_peer(0)); phandle != 0;
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phandle = OF_peer(phandle)) {
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if (OF_getprop(phandle, "name", name, sizeof(name)) <= 0)
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continue;
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if (strncmp(name, "memory", sizeof(name)) != 0)
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continue;
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res = parse_ofw_memory(phandle, "reg", &OFmem[msz]);
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msz += res/sizeof(struct mem_region);
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if (OF_getproplen(phandle, "available") >= 0)
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res = parse_ofw_memory(phandle, "available",
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&OFavail[asz]);
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else
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res = parse_ofw_memory(phandle, "reg", &OFavail[asz]);
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asz += res/sizeof(struct mem_region);
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}
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/* Check for memory in ibm,dynamic-reconfiguration-memory */
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parse_drconf_memory(&msz, &asz, OFmem, OFavail);
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qsort(OFmem, msz, sizeof(*OFmem), mr_cmp);
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qsort(OFavail, asz, sizeof(*OFavail), mr_cmp);
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*memp = OFmem;
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*memsz = msz;
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/*
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* On some firmwares (SLOF), some memory may be marked available that
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* doesn't actually exist. This manifests as an extension of the last
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* available segment past the end of physical memory, so truncate that
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* one.
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*/
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maxphysaddr = 0;
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for (i = 0; i < msz; i++)
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if (OFmem[i].mr_start + OFmem[i].mr_size > maxphysaddr)
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maxphysaddr = OFmem[i].mr_start + OFmem[i].mr_size;
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if (OFavail[asz - 1].mr_start + OFavail[asz - 1].mr_size > maxphysaddr)
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OFavail[asz - 1].mr_size = maxphysaddr -
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OFavail[asz - 1].mr_start;
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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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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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OF_initial_setup(void *fdt_ptr, void *junk, int (*openfirm)(void *))
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{
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if (ofmsr[0] & PSL_DR)
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ofw_real_mode = 0;
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else
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ofw_real_mode = 1;
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fdt = fdt_ptr;
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#ifdef FDT_DTB_STATIC
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/* Check for a statically included blob */
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if (fdt == NULL)
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fdt = &fdt_static_dtb;
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#endif
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}
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boolean_t
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OF_bootstrap()
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{
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boolean_t status = FALSE;
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if (openfirmware_entry != NULL) {
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if (ofw_real_mode) {
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status = OF_install(OFW_STD_REAL, 0);
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} else {
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#ifdef __powerpc64__
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status = OF_install(OFW_STD_32BIT, 0);
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#else
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status = OF_install(OFW_STD_DIRECT, 0);
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#endif
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}
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if (status != TRUE)
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return status;
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|
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OF_init(openfirmware);
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|
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/*
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* On some machines, we need to quiesce OF to turn off
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* background processes.
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*/
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ofw_quiesce();
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} else if (fdt != NULL) {
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status = OF_install(OFW_FDT, 0);
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if (status != TRUE)
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return status;
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OF_init(fdt);
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}
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return (status);
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}
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|
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static void
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ofw_quiesce(void)
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{
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phandle_t rootnode;
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char model[32];
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struct {
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cell_t name;
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cell_t nargs;
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cell_t nreturns;
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} args;
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/*
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* Only quiesce Open Firmware on PowerMac11,2 and 12,1. It is
|
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* necessary there to shut down a background thread doing fan
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* management, and is harmful on other machines.
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*
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* Note: we don't need to worry about which OF module we are
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* using since this is called only from very early boot, within
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* OF's boot context.
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*/
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|
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rootnode = OF_finddevice("/");
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if (OF_getprop(rootnode, "model", model, sizeof(model)) > 0) {
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if (strcmp(model, "PowerMac11,2") == 0 ||
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strcmp(model, "PowerMac12,1") == 0) {
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args.name = (cell_t)(uintptr_t)"quiesce";
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args.nargs = 0;
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args.nreturns = 0;
|
|
openfirmware(&args);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int
|
|
openfirmware_core(void *args)
|
|
{
|
|
int result;
|
|
register_t oldmsr;
|
|
|
|
/*
|
|
* Turn off exceptions - we really don't want to end up
|
|
* anywhere unexpected with PCPU set to something strange
|
|
* or the stack pointer wrong.
|
|
*/
|
|
oldmsr = intr_disable();
|
|
|
|
ofw_sprg_prepare();
|
|
|
|
#if defined(AIM) && !defined(__powerpc64__)
|
|
/*
|
|
* Clear battable[] translations
|
|
*/
|
|
if (!(cpu_features & PPC_FEATURE_64))
|
|
__asm __volatile("mtdbatu 2, %0\n"
|
|
"mtdbatu 3, %0" : : "r" (0));
|
|
isync();
|
|
#endif
|
|
|
|
result = ofwcall(args);
|
|
ofw_sprg_restore();
|
|
|
|
intr_restore(oldmsr);
|
|
|
|
return (result);
|
|
}
|
|
|
|
#ifdef SMP
|
|
struct ofw_rv_args {
|
|
void *args;
|
|
int retval;
|
|
volatile int in_progress;
|
|
};
|
|
|
|
static void
|
|
ofw_rendezvous_dispatch(void *xargs)
|
|
{
|
|
struct ofw_rv_args *rv_args = xargs;
|
|
|
|
/* NOTE: Interrupts are disabled here */
|
|
|
|
if (PCPU_GET(cpuid) == 0) {
|
|
/*
|
|
* Execute all OF calls on CPU 0
|
|
*/
|
|
rv_args->retval = openfirmware_core(rv_args->args);
|
|
rv_args->in_progress = 0;
|
|
} else {
|
|
/*
|
|
* Spin with interrupts off on other CPUs while OF has
|
|
* control of the machine.
|
|
*/
|
|
while (rv_args->in_progress)
|
|
cpu_spinwait();
|
|
}
|
|
}
|
|
#endif
|
|
|
|
static int
|
|
openfirmware(void *args)
|
|
{
|
|
int result;
|
|
#ifdef SMP
|
|
struct ofw_rv_args rv_args;
|
|
|
|
rv_args.args = args;
|
|
rv_args.in_progress = 1;
|
|
smp_rendezvous(smp_no_rendevous_barrier, ofw_rendezvous_dispatch,
|
|
smp_no_rendevous_barrier, &rv_args);
|
|
result = rv_args.retval;
|
|
#else
|
|
result = openfirmware_core(args);
|
|
#endif
|
|
|
|
return (result);
|
|
}
|
|
|
|
void
|
|
OF_reboot()
|
|
{
|
|
struct {
|
|
cell_t name;
|
|
cell_t nargs;
|
|
cell_t nreturns;
|
|
cell_t arg;
|
|
} args;
|
|
|
|
args.name = (cell_t)(uintptr_t)"interpret";
|
|
args.nargs = 1;
|
|
args.nreturns = 0;
|
|
args.arg = (cell_t)(uintptr_t)"reset-all";
|
|
openfirmware_core(&args); /* Don't do rendezvous! */
|
|
|
|
for (;;); /* just in case */
|
|
}
|
|
|
|
void
|
|
OF_getetheraddr(device_t dev, u_char *addr)
|
|
{
|
|
phandle_t node;
|
|
|
|
node = ofw_bus_get_node(dev);
|
|
OF_getprop(node, "local-mac-address", addr, ETHER_ADDR_LEN);
|
|
}
|
|
|
|
/*
|
|
* Return a bus handle and bus tag that corresponds to the register
|
|
* numbered regno for the device referenced by the package handle
|
|
* dev. This function is intended to be used by console drivers in
|
|
* early boot only. It works by mapping the address of the device's
|
|
* register in the address space of its parent and recursively walk
|
|
* the device tree upward this way.
|
|
*/
|
|
static void
|
|
OF_get_addr_props(phandle_t node, uint32_t *addrp, uint32_t *sizep, int *pcip)
|
|
{
|
|
char name[16];
|
|
uint32_t addr, size;
|
|
int pci, res;
|
|
|
|
res = OF_getprop(node, "#address-cells", &addr, sizeof(addr));
|
|
if (res == -1)
|
|
addr = 2;
|
|
res = OF_getprop(node, "#size-cells", &size, sizeof(size));
|
|
if (res == -1)
|
|
size = 1;
|
|
pci = 0;
|
|
if (addr == 3 && size == 2) {
|
|
res = OF_getprop(node, "name", name, sizeof(name));
|
|
if (res != -1) {
|
|
name[sizeof(name) - 1] = '\0';
|
|
pci = (strcmp(name, "pci") == 0) ? 1 : 0;
|
|
}
|
|
}
|
|
if (addrp != NULL)
|
|
*addrp = addr;
|
|
if (sizep != NULL)
|
|
*sizep = size;
|
|
if (pcip != NULL)
|
|
*pcip = pci;
|
|
}
|
|
|
|
int
|
|
OF_decode_addr(phandle_t dev, int regno, bus_space_tag_t *tag,
|
|
bus_space_handle_t *handle)
|
|
{
|
|
uint32_t cell[32];
|
|
bus_addr_t addr, raddr, baddr;
|
|
bus_size_t size, rsize;
|
|
uint32_t c, nbridge, naddr, nsize;
|
|
phandle_t bridge, parent;
|
|
u_int spc, rspc;
|
|
int pci, pcib, res;
|
|
|
|
/* Sanity checking. */
|
|
if (dev == 0)
|
|
return (EINVAL);
|
|
bridge = OF_parent(dev);
|
|
if (bridge == 0)
|
|
return (EINVAL);
|
|
if (regno < 0)
|
|
return (EINVAL);
|
|
if (tag == NULL || handle == NULL)
|
|
return (EINVAL);
|
|
|
|
/* Get the requested register. */
|
|
OF_get_addr_props(bridge, &naddr, &nsize, &pci);
|
|
res = OF_getprop(dev, (pci) ? "assigned-addresses" : "reg",
|
|
cell, sizeof(cell));
|
|
if (res == -1)
|
|
return (ENXIO);
|
|
if (res % sizeof(cell[0]))
|
|
return (ENXIO);
|
|
res /= sizeof(cell[0]);
|
|
regno *= naddr + nsize;
|
|
if (regno + naddr + nsize > res)
|
|
return (EINVAL);
|
|
spc = (pci) ? cell[regno] & OFW_PCI_PHYS_HI_SPACEMASK : ~0;
|
|
addr = 0;
|
|
for (c = 0; c < naddr; c++)
|
|
addr = ((uint64_t)addr << 32) | cell[regno++];
|
|
size = 0;
|
|
for (c = 0; c < nsize; c++)
|
|
size = ((uint64_t)size << 32) | cell[regno++];
|
|
|
|
/*
|
|
* Map the address range in the bridge's decoding window as given
|
|
* by the "ranges" property. If a node doesn't have such property
|
|
* then no mapping is done.
|
|
*/
|
|
parent = OF_parent(bridge);
|
|
while (parent != 0) {
|
|
OF_get_addr_props(parent, &nbridge, NULL, &pcib);
|
|
res = OF_getprop(bridge, "ranges", cell, sizeof(cell));
|
|
if (res == -1)
|
|
goto next;
|
|
if (res % sizeof(cell[0]))
|
|
return (ENXIO);
|
|
res /= sizeof(cell[0]);
|
|
regno = 0;
|
|
while (regno < res) {
|
|
rspc = (pci)
|
|
? cell[regno] & OFW_PCI_PHYS_HI_SPACEMASK
|
|
: ~0;
|
|
if (rspc != spc) {
|
|
regno += naddr + nbridge + nsize;
|
|
continue;
|
|
}
|
|
raddr = 0;
|
|
for (c = 0; c < naddr; c++)
|
|
raddr = ((uint64_t)raddr << 32) | cell[regno++];
|
|
rspc = (pcib)
|
|
? cell[regno] & OFW_PCI_PHYS_HI_SPACEMASK
|
|
: ~0;
|
|
baddr = 0;
|
|
for (c = 0; c < nbridge; c++)
|
|
baddr = ((uint64_t)baddr << 32) | cell[regno++];
|
|
rsize = 0;
|
|
for (c = 0; c < nsize; c++)
|
|
rsize = ((uint64_t)rsize << 32) | cell[regno++];
|
|
if (addr < raddr || addr >= raddr + rsize)
|
|
continue;
|
|
addr = addr - raddr + baddr;
|
|
if (rspc != ~0)
|
|
spc = rspc;
|
|
}
|
|
|
|
next:
|
|
bridge = parent;
|
|
parent = OF_parent(bridge);
|
|
OF_get_addr_props(bridge, &naddr, &nsize, &pci);
|
|
}
|
|
|
|
*tag = &bs_le_tag;
|
|
return (bus_space_map(*tag, addr, size, 0, handle));
|
|
}
|
|
|