280 lines
6.3 KiB
C
280 lines
6.3 KiB
C
/*-
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* Copyright (c) 2008 Marcel Moolenaar
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* Copyright (c) 2009 Nathan Whitehorn
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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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*
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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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/systm.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <sys/pcpu.h>
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#include <sys/proc.h>
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#include <sys/smp.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <machine/bus.h>
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#include <machine/cpu.h>
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#include <machine/hid.h>
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#include <machine/platformvar.h>
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#include <machine/pmap.h>
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#include <machine/smp.h>
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#include <machine/spr.h>
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#include <dev/ofw/openfirm.h>
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#include <machine/ofw_machdep.h>
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#include "platform_if.h"
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#ifdef SMP
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extern void *ap_pcpu;
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#endif
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static int chrp_probe(platform_t);
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void chrp_mem_regions(platform_t, struct mem_region **phys, int *physsz,
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struct mem_region **avail, int *availsz);
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static u_long chrp_timebase_freq(platform_t, struct cpuref *cpuref);
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static int chrp_smp_first_cpu(platform_t, struct cpuref *cpuref);
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static int chrp_smp_next_cpu(platform_t, struct cpuref *cpuref);
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static int chrp_smp_get_bsp(platform_t, struct cpuref *cpuref);
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static int chrp_smp_start_cpu(platform_t, struct pcpu *cpu);
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static platform_method_t chrp_methods[] = {
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PLATFORMMETHOD(platform_probe, chrp_probe),
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PLATFORMMETHOD(platform_mem_regions, chrp_mem_regions),
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PLATFORMMETHOD(platform_timebase_freq, chrp_timebase_freq),
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PLATFORMMETHOD(platform_smp_first_cpu, chrp_smp_first_cpu),
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PLATFORMMETHOD(platform_smp_next_cpu, chrp_smp_next_cpu),
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PLATFORMMETHOD(platform_smp_get_bsp, chrp_smp_get_bsp),
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PLATFORMMETHOD(platform_smp_start_cpu, chrp_smp_start_cpu),
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{ 0, 0 }
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};
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static platform_def_t chrp_platform = {
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"chrp",
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chrp_methods,
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0
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};
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PLATFORM_DEF(chrp_platform);
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static int
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chrp_probe(platform_t plat)
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{
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if (OF_finddevice("/memory") != -1 || OF_finddevice("/memory@0") != -1)
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return (BUS_PROBE_GENERIC);
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return (ENXIO);
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}
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void
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chrp_mem_regions(platform_t plat, struct mem_region **phys, int *physsz,
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struct mem_region **avail, int *availsz)
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{
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ofw_mem_regions(phys,physsz,avail,availsz);
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}
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static u_long
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chrp_timebase_freq(platform_t plat, struct cpuref *cpuref)
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{
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phandle_t phandle;
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int32_t ticks = -1;
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phandle = cpuref->cr_hwref;
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OF_getprop(phandle, "timebase-frequency", &ticks, sizeof(ticks));
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if (ticks <= 0)
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panic("Unable to determine timebase frequency!");
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return (ticks);
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}
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static int
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chrp_smp_fill_cpuref(struct cpuref *cpuref, phandle_t cpu)
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{
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cell_t cpuid, res;
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cpuref->cr_hwref = cpu;
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res = OF_getprop(cpu, "reg", &cpuid, sizeof(cpuid));
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/*
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* psim doesn't have a reg property, so assume 0 as for the
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* uniprocessor case in the CHRP spec.
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*/
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if (res < 0) {
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cpuid = 0;
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}
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cpuref->cr_cpuid = cpuid & 0xff;
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return (0);
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}
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static int
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chrp_smp_first_cpu(platform_t plat, struct cpuref *cpuref)
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{
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char buf[8];
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phandle_t cpu, dev, root;
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int res;
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root = OF_peer(0);
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dev = OF_child(root);
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while (dev != 0) {
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res = OF_getprop(dev, "name", buf, sizeof(buf));
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if (res > 0 && strcmp(buf, "cpus") == 0)
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break;
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dev = OF_peer(dev);
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}
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if (dev == 0) {
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/*
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* psim doesn't have a name property on the /cpus node,
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* but it can be found directly
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*/
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dev = OF_finddevice("/cpus");
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if (dev == 0)
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return (ENOENT);
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}
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cpu = OF_child(dev);
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while (cpu != 0) {
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res = OF_getprop(cpu, "device_type", buf, sizeof(buf));
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if (res > 0 && strcmp(buf, "cpu") == 0)
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break;
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cpu = OF_peer(cpu);
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}
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if (cpu == 0)
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return (ENOENT);
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return (chrp_smp_fill_cpuref(cpuref, cpu));
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}
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static int
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chrp_smp_next_cpu(platform_t plat, struct cpuref *cpuref)
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{
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char buf[8];
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phandle_t cpu;
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int res;
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cpu = OF_peer(cpuref->cr_hwref);
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while (cpu != 0) {
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res = OF_getprop(cpu, "device_type", buf, sizeof(buf));
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if (res > 0 && strcmp(buf, "cpu") == 0)
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break;
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cpu = OF_peer(cpu);
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}
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if (cpu == 0)
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return (ENOENT);
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return (chrp_smp_fill_cpuref(cpuref, cpu));
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}
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static int
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chrp_smp_get_bsp(platform_t plat, struct cpuref *cpuref)
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{
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ihandle_t inst;
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phandle_t bsp, chosen;
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int res;
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chosen = OF_finddevice("/chosen");
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if (chosen == 0)
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return (ENXIO);
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res = OF_getprop(chosen, "cpu", &inst, sizeof(inst));
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if (res < 0)
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return (ENXIO);
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bsp = OF_instance_to_package(inst);
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return (chrp_smp_fill_cpuref(cpuref, bsp));
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}
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static int
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chrp_smp_start_cpu(platform_t plat, struct pcpu *pc)
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{
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#ifdef SMP
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phandle_t cpu;
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volatile uint8_t *rstvec;
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static volatile uint8_t *rstvec_virtbase = NULL;
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int res, reset, timeout;
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cpu = pc->pc_hwref;
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res = OF_getprop(cpu, "soft-reset", &reset, sizeof(reset));
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if (res < 0) {
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reset = 0x58;
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switch (pc->pc_cpuid) {
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case 0:
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reset += 0x03;
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break;
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case 1:
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reset += 0x04;
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break;
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case 2:
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reset += 0x0f;
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break;
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case 3:
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reset += 0x10;
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break;
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default:
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return (ENXIO);
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}
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}
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ap_pcpu = pc;
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if (rstvec_virtbase == NULL)
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rstvec_virtbase = pmap_mapdev(0x80000000, PAGE_SIZE);
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rstvec = rstvec_virtbase + reset;
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*rstvec = 4;
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powerpc_sync();
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(void)(*rstvec);
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powerpc_sync();
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DELAY(1);
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*rstvec = 0;
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powerpc_sync();
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(void)(*rstvec);
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powerpc_sync();
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timeout = 10000;
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while (!pc->pc_awake && timeout--)
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DELAY(100);
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return ((pc->pc_awake) ? 0 : EBUSY);
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#else
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/* No SMP support */
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return (ENXIO);
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#endif
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}
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