668 lines
15 KiB
C
668 lines
15 KiB
C
/*-
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* SPDX-License-Identifier: BSD-4-Clause
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*
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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 "opt_platform.h"
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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 <sys/endian.h>
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#include <net/ethernet.h>
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#include <dev/fdt/fdt_common.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 <dev/ofw/ofw_subr.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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#include <machine/trap.h>
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#include <contrib/libfdt/libfdt.h>
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static void *fdt;
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int ofw_real_mode;
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#ifdef AIM
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extern register_t ofmsr[5];
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extern void *openfirmware_entry;
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char save_trap_init[0x2f00]; /* EXC_LAST */
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char save_trap_of[0x2f00]; /* EXC_LAST */
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int ofwcall(void *);
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static int openfirmware(void *args);
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__inline void
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ofw_save_trap_vec(char *save_trap_vec)
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{
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if (!ofw_real_mode || !hw_direct_map)
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return;
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bcopy((void *)PHYS_TO_DMAP(EXC_RST), save_trap_vec, EXC_LAST - EXC_RST);
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}
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static __inline void
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ofw_restore_trap_vec(char *restore_trap_vec)
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{
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if (!ofw_real_mode || !hw_direct_map)
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return;
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bcopy(restore_trap_vec, (void *)PHYS_TO_DMAP(EXC_RST),
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EXC_LAST - EXC_RST);
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__syncicache((void *)PHYS_TO_DMAP(EXC_RSVD), EXC_LAST - EXC_RSVD);
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}
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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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if (ofw_real_mode)
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return;
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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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#ifdef __powerpc64__
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__asm __volatile("mtsprg1 %0\n\t"
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"mtsprg2 %1\n\t"
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"mtsprg3 %2\n\t"
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:
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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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#else
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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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#endif
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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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if (ofw_real_mode)
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return;
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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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#ifndef __powerpc64__
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__asm __volatile("mtsprg0 %0" :: "r"(ofw_sprg0_save));
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#endif
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}
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#endif
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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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phandle_t phandle;
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sz = 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_getencprop(phandle, "#address-cells", &address_cells,
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sizeof(address_cells)) < (ssize_t)sizeof(address_cells))
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address_cells = 1;
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if (OF_getencprop(phandle, "#size-cells", &size_cells,
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sizeof(size_cells)) < (ssize_t)sizeof(size_cells))
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size_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_getencprop(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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output[j].mr_start = OFmem[i++];
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if (address_cells == 2) {
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output[j].mr_start <<= 32;
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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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output[j].mr_size <<= 32;
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output[j].mr_size += OFmem[i++];
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}
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if (output[j].mr_start > BUS_SPACE_MAXADDR)
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continue;
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/*
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* Constrain memory to that which we can access.
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* 32-bit AIM can only reference 32 bits of address currently,
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* but Book-E can access 36 bits.
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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 - 1) >
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BUS_SPACE_MAXADDR) {
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output[j].mr_size = BUS_SPACE_MAXADDR -
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output[j].mr_start + 1;
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}
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j++;
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}
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sz = j*sizeof(output[0]);
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return (sz);
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}
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#ifdef FDT
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static int
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excise_fdt_reserved(struct mem_region *avail, int asz)
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{
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struct {
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uint64_t address;
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uint64_t size;
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} fdtmap[16];
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ssize_t fdtmapsize;
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phandle_t chosen;
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int i, j, k;
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chosen = OF_finddevice("/chosen");
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fdtmapsize = OF_getprop(chosen, "fdtmemreserv", fdtmap, sizeof(fdtmap));
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for (j = 0; j < fdtmapsize/sizeof(fdtmap[0]); j++) {
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fdtmap[j].address = be64toh(fdtmap[j].address) & ~PAGE_MASK;
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fdtmap[j].size = round_page(be64toh(fdtmap[j].size));
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}
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KASSERT(j*sizeof(fdtmap[0]) < sizeof(fdtmap),
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("Exceeded number of FDT reservations"));
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/* Add a virtual entry for the FDT itself */
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if (fdt != NULL) {
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fdtmap[j].address = (vm_offset_t)fdt & ~PAGE_MASK;
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fdtmap[j].size = round_page(fdt_totalsize(fdt));
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fdtmapsize += sizeof(fdtmap[0]);
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}
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for (i = 0; i < asz; i++) {
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for (j = 0; j < fdtmapsize/sizeof(fdtmap[0]); j++) {
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/*
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* Case 1: Exclusion region encloses complete
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* available entry. Drop it and move on.
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*/
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if (fdtmap[j].address <= avail[i].mr_start &&
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fdtmap[j].address + fdtmap[j].size >=
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avail[i].mr_start + avail[i].mr_size) {
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for (k = i+1; k < asz; k++)
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avail[k-1] = avail[k];
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asz--;
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i--; /* Repeat some entries */
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continue;
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}
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/*
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* Case 2: Exclusion region starts in available entry.
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* Trim it to where the entry begins and append
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* a new available entry with the region after
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* the excluded region, if any.
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*/
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if (fdtmap[j].address >= avail[i].mr_start &&
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fdtmap[j].address < avail[i].mr_start +
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avail[i].mr_size) {
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if (fdtmap[j].address + fdtmap[j].size <
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avail[i].mr_start + avail[i].mr_size) {
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avail[asz].mr_start =
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fdtmap[j].address + fdtmap[j].size;
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avail[asz].mr_size = avail[i].mr_start +
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avail[i].mr_size -
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avail[asz].mr_start;
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asz++;
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}
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avail[i].mr_size = fdtmap[j].address -
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avail[i].mr_start;
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}
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/*
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* Case 3: Exclusion region ends in available entry.
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* Move start point to where the exclusion zone ends.
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* The case of a contained exclusion zone has already
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* been caught in case 2.
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*/
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if (fdtmap[j].address + fdtmap[j].size >=
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avail[i].mr_start && fdtmap[j].address +
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fdtmap[j].size < avail[i].mr_start +
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avail[i].mr_size) {
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avail[i].mr_size += avail[i].mr_start;
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avail[i].mr_start =
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fdtmap[j].address + fdtmap[j].size;
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avail[i].mr_size -= avail[i].mr_start;
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}
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}
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}
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return (asz);
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}
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#endif
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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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* The available regions need not take the kernel into account.
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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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int asz, msz;
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int res;
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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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strncmp(name, "memory@", strlen("memory@")) != 0)
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continue;
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res = parse_ofw_memory(phandle, "reg", &memp[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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&availp[asz]);
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else
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res = parse_ofw_memory(phandle, "reg", &availp[asz]);
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asz += res/sizeof(struct mem_region);
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}
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#ifdef FDT
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phandle = OF_finddevice("/chosen");
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if (OF_hasprop(phandle, "fdtmemreserv"))
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asz = excise_fdt_reserved(availp, asz);
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#endif
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*memsz = msz;
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*availsz = asz;
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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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#ifdef AIM
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ofmsr[0] = mfmsr();
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#ifdef __powerpc64__
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ofmsr[0] &= ~PSL_SF;
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#else
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__asm __volatile("mfsprg0 %0" : "=&r"(ofmsr[1]));
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#endif
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__asm __volatile("mfsprg1 %0" : "=&r"(ofmsr[2]));
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__asm __volatile("mfsprg2 %0" : "=&r"(ofmsr[3]));
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__asm __volatile("mfsprg3 %0" : "=&r"(ofmsr[4]));
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openfirmware_entry = openfirm;
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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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ofw_save_trap_vec(save_trap_init);
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#else
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ofw_real_mode = 1;
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#endif
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fdt = fdt_ptr;
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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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int err = 0;
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#ifdef AIM
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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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err = OF_init(openfirmware);
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} else
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#endif
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if (fdt != NULL) {
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#ifdef FDT
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#ifdef AIM
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bus_space_tag_t fdt_bt;
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vm_offset_t tmp_fdt_ptr;
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vm_size_t fdt_size;
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uintptr_t fdt_va;
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#endif
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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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#ifdef AIM /* AIM-only for now -- Book-E does this remapping in early init */
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/* Get the FDT size for mapping if we can */
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tmp_fdt_ptr = pmap_early_io_map((vm_paddr_t)fdt, PAGE_SIZE);
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if (fdt_check_header((void *)tmp_fdt_ptr) != 0) {
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pmap_early_io_unmap(tmp_fdt_ptr, PAGE_SIZE);
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return FALSE;
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}
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fdt_size = fdt_totalsize((void *)tmp_fdt_ptr);
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pmap_early_io_unmap(tmp_fdt_ptr, PAGE_SIZE);
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/*
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* Map this for real. Use bus_space_map() to take advantage
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* of its auto-remapping function once the kernel is loaded.
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* This is a dirty hack, but what we have.
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*/
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#ifdef _LITTLE_ENDIAN
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fdt_bt = &bs_le_tag;
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#else
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fdt_bt = &bs_be_tag;
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#endif
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bus_space_map(fdt_bt, (vm_paddr_t)fdt, fdt_size, 0, &fdt_va);
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err = OF_init((void *)fdt_va);
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#else
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err = OF_init(fdt);
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#endif
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#endif
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}
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#ifdef FDT_DTB_STATIC
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/*
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* Check for a statically included blob already in the kernel and
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* needing no mapping.
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*/
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else {
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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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err = OF_init(&fdt_static_dtb);
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}
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#endif
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if (err != 0) {
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OF_install(NULL, 0);
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status = FALSE;
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}
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return (status);
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}
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#ifdef AIM
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void
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ofw_quiesce(void)
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{
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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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KASSERT(!pmap_bootstrapped, ("Cannot call ofw_quiesce after VM is up"));
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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;
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openfirmware(&args);
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}
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static int
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openfirmware_core(void *args)
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{
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int result;
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register_t oldmsr;
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if (openfirmware_entry == NULL)
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return (-1);
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/*
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* Turn off exceptions - we really don't want to end up
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* anywhere unexpected with PCPU set to something strange
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* or the stack pointer wrong.
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*/
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oldmsr = intr_disable();
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ofw_sprg_prepare();
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/* Save trap vectors */
|
|
ofw_save_trap_vec(save_trap_of);
|
|
|
|
/* Restore initially saved trap vectors */
|
|
ofw_restore_trap_vec(save_trap_init);
|
|
|
|
#ifndef __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);
|
|
|
|
/* Restore trap vecotrs */
|
|
ofw_restore_trap_vec(save_trap_of);
|
|
|
|
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;
|
|
#endif
|
|
|
|
if (openfirmware_entry == NULL)
|
|
return (-1);
|
|
|
|
#ifdef SMP
|
|
if (cold) {
|
|
result = openfirmware_core(args);
|
|
} else {
|
|
rv_args.args = args;
|
|
rv_args.in_progress = 1;
|
|
smp_rendezvous(smp_no_rendezvous_barrier,
|
|
ofw_rendezvous_dispatch, smp_no_rendezvous_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 */
|
|
}
|
|
|
|
#endif /* AIM */
|
|
|
|
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.
|
|
*/
|
|
int
|
|
OF_decode_addr(phandle_t dev, int regno, bus_space_tag_t *tag,
|
|
bus_space_handle_t *handle, bus_size_t *sz)
|
|
{
|
|
bus_addr_t addr;
|
|
bus_size_t size;
|
|
pcell_t pci_hi;
|
|
int flags, res;
|
|
|
|
res = ofw_reg_to_paddr(dev, regno, &addr, &size, &pci_hi);
|
|
if (res < 0)
|
|
return (res);
|
|
|
|
if (pci_hi == OFW_PADDR_NOT_PCI) {
|
|
*tag = &bs_be_tag;
|
|
flags = 0;
|
|
} else {
|
|
*tag = &bs_le_tag;
|
|
flags = (pci_hi & OFW_PCI_PHYS_HI_PREFETCHABLE) ?
|
|
BUS_SPACE_MAP_PREFETCHABLE: 0;
|
|
}
|
|
|
|
if (sz != NULL)
|
|
*sz = size;
|
|
|
|
return (bus_space_map(*tag, addr, size, flags, handle));
|
|
}
|
|
|