acccf7d8b4
When CPU becomes idle, cpu_idleclock() calculates time to the next timer event in order to reprogram hw timer. Return that time in sbintime_t to the caller and pass it to acpi_cpu_idle(), where it can be used as one more factor (quite precise) to extimate furter sleep time and choose optimal sleep state. This is a preparatory change for further callout improvements will be committed in the next days. The commmit is not targeted for MFC.
253 lines
6.5 KiB
C
253 lines
6.5 KiB
C
/*-
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* Copyright (c) 2010 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/reboot.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/platform.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 <machine/vmparam.h>
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#include "platform_if.h"
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#include "ps3-hvcall.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 ps3_probe(platform_t);
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static int ps3_attach(platform_t);
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static void ps3_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 vm_offset_t ps3_real_maxaddr(platform_t);
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static u_long ps3_timebase_freq(platform_t, struct cpuref *cpuref);
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#ifdef SMP
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static int ps3_smp_first_cpu(platform_t, struct cpuref *cpuref);
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static int ps3_smp_next_cpu(platform_t, struct cpuref *cpuref);
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static int ps3_smp_get_bsp(platform_t, struct cpuref *cpuref);
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static int ps3_smp_start_cpu(platform_t, struct pcpu *cpu);
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static struct cpu_group *ps3_smp_topo(platform_t);
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#endif
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static void ps3_reset(platform_t);
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static void ps3_cpu_idle(sbintime_t);
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static platform_method_t ps3_methods[] = {
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PLATFORMMETHOD(platform_probe, ps3_probe),
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PLATFORMMETHOD(platform_attach, ps3_attach),
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PLATFORMMETHOD(platform_mem_regions, ps3_mem_regions),
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PLATFORMMETHOD(platform_real_maxaddr, ps3_real_maxaddr),
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PLATFORMMETHOD(platform_timebase_freq, ps3_timebase_freq),
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#ifdef SMP
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PLATFORMMETHOD(platform_smp_first_cpu, ps3_smp_first_cpu),
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PLATFORMMETHOD(platform_smp_next_cpu, ps3_smp_next_cpu),
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PLATFORMMETHOD(platform_smp_get_bsp, ps3_smp_get_bsp),
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PLATFORMMETHOD(platform_smp_start_cpu, ps3_smp_start_cpu),
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PLATFORMMETHOD(platform_smp_topo, ps3_smp_topo),
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#endif
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PLATFORMMETHOD(platform_reset, ps3_reset),
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PLATFORMMETHOD_END
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};
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static platform_def_t ps3_platform = {
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"ps3",
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ps3_methods,
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0
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};
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PLATFORM_DEF(ps3_platform);
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static int
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ps3_probe(platform_t plat)
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{
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return (BUS_PROBE_NOWILDCARD);
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}
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#define MEM_REGIONS 2
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static struct mem_region avail_regions[MEM_REGIONS];
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static int
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ps3_attach(platform_t plat)
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{
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uint64_t lpar_id, junk, ppe_id;
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/* Get real mode memory region */
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avail_regions[0].mr_start = 0;
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lv1_get_logical_partition_id(&lpar_id);
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lv1_get_logical_ppe_id(&ppe_id);
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lv1_get_repository_node_value(lpar_id,
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lv1_repository_string("bi") >> 32, lv1_repository_string("pu"),
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ppe_id, lv1_repository_string("rm_size"),
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&avail_regions[0].mr_size, &junk);
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/* Now get extended memory region */
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lv1_get_repository_node_value(lpar_id,
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lv1_repository_string("bi") >> 32,
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lv1_repository_string("rgntotal"), 0, 0,
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&avail_regions[1].mr_size, &junk);
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/* Convert to maximum amount we can allocate in 16 MB pages */
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avail_regions[1].mr_size -= avail_regions[0].mr_size;
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avail_regions[1].mr_size -= avail_regions[1].mr_size % (16*1024*1024);
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lv1_allocate_memory(avail_regions[1].mr_size, 24 /* 16 MB pages */,
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0, 0x04 /* any address */, &avail_regions[1].mr_start, &junk);
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pmap_mmu_install("mmu_ps3", BUS_PROBE_SPECIFIC);
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cpu_idle_hook = ps3_cpu_idle;
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/* Set a breakpoint to make NULL an invalid address */
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lv1_set_dabr(0x7 /* read and write, MMU on */, 2 /* kernel accesses */);
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return (0);
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}
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void
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ps3_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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*phys = *avail = avail_regions;
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*physsz = *availsz = MEM_REGIONS;
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}
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static u_long
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ps3_timebase_freq(platform_t plat, struct cpuref *cpuref)
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{
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uint64_t ticks, node_id, junk;
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lv1_get_repository_node_value(PS3_LPAR_ID_PME,
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lv1_repository_string("be") >> 32, 0, 0, 0, &node_id, &junk);
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lv1_get_repository_node_value(PS3_LPAR_ID_PME,
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lv1_repository_string("be") >> 32, node_id,
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lv1_repository_string("clock"), 0, &ticks, &junk);
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return (ticks);
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}
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#ifdef SMP
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static int
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ps3_smp_first_cpu(platform_t plat, struct cpuref *cpuref)
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{
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cpuref->cr_cpuid = 0;
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cpuref->cr_hwref = cpuref->cr_cpuid;
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return (0);
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}
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static int
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ps3_smp_next_cpu(platform_t plat, struct cpuref *cpuref)
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{
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if (cpuref->cr_cpuid >= 1)
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return (ENOENT);
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cpuref->cr_cpuid++;
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cpuref->cr_hwref = cpuref->cr_cpuid;
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return (0);
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}
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static int
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ps3_smp_get_bsp(platform_t plat, struct cpuref *cpuref)
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{
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cpuref->cr_cpuid = 0;
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cpuref->cr_hwref = cpuref->cr_cpuid;
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return (0);
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}
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static int
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ps3_smp_start_cpu(platform_t plat, struct pcpu *pc)
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{
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/* loader(8) is spinning on 0x40 == 0 right now */
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uint32_t *secondary_spin_sem = (uint32_t *)(0x40);
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int timeout;
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if (pc->pc_hwref != 1)
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return (ENXIO);
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ap_pcpu = pc;
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*secondary_spin_sem = 1;
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powerpc_sync();
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DELAY(1);
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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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}
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static struct cpu_group *
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ps3_smp_topo(platform_t plat)
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{
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return (smp_topo_1level(CG_SHARE_L1, 2, CG_FLAG_SMT));
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}
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#endif
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static void
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ps3_reset(platform_t plat)
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{
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lv1_panic(1);
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}
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static vm_offset_t
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ps3_real_maxaddr(platform_t plat)
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{
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return (avail_regions[0].mr_start + avail_regions[0].mr_size);
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}
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static void
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ps3_cpu_idle(sbintime_t sbt)
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{
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lv1_pause(0);
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}
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