FreeBSD/Linux Kernel Cross Reference
sys/powerpc/ps3/platform_ps3.c

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2010 Nathan Whitehorn
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
     *
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/bus.h>
    #include <sys/pcpu.h>
    #include <sys/proc.h>
    #include <sys/reboot.h>
    #include <sys/smp.h>
    
    #include <vm/vm.h>
    #include <vm/pmap.h>
    
    #include <machine/bus.h>
    #include <machine/cpu.h>
    #include <machine/hid.h>
    #include <machine/platform.h>
    #include <machine/platformvar.h>
    #include <machine/smp.h>
    #include <machine/spr.h>
    #include <machine/vmparam.h>
    
    #include <dev/ofw/openfirm.h>
    
    #include "platform_if.h"
    #include "ps3-hvcall.h"
    
    #ifdef SMP
    extern void *ap_pcpu;
    #endif
    
    static int ps3_probe(platform_t);
    static int ps3_attach(platform_t);
    static void ps3_mem_regions(platform_t, struct mem_region *phys, int *physsz,
        struct mem_region *avail, int *availsz);
    static vm_offset_t ps3_real_maxaddr(platform_t);
    static u_long ps3_timebase_freq(platform_t, struct cpuref *cpuref);
    #ifdef SMP
    static int ps3_smp_first_cpu(platform_t, struct cpuref *cpuref);
    static int ps3_smp_next_cpu(platform_t, struct cpuref *cpuref);
    static int ps3_smp_get_bsp(platform_t, struct cpuref *cpuref);
    static int ps3_smp_start_cpu(platform_t, struct pcpu *cpu);
    static void ps3_smp_probe_threads(platform_t);
    static struct cpu_group *ps3_smp_topo(platform_t);
    #endif
    static void ps3_reset(platform_t);
    static void ps3_cpu_idle(sbintime_t);
    
    static platform_method_t ps3_methods[] = {
            PLATFORMMETHOD(platform_probe,          ps3_probe),
            PLATFORMMETHOD(platform_attach,         ps3_attach),
            PLATFORMMETHOD(platform_mem_regions,    ps3_mem_regions),
            PLATFORMMETHOD(platform_real_maxaddr,   ps3_real_maxaddr),
            PLATFORMMETHOD(platform_timebase_freq,  ps3_timebase_freq),
    
    #ifdef SMP
            PLATFORMMETHOD(platform_smp_first_cpu,  ps3_smp_first_cpu),
            PLATFORMMETHOD(platform_smp_next_cpu,   ps3_smp_next_cpu),
            PLATFORMMETHOD(platform_smp_get_bsp,    ps3_smp_get_bsp),
            PLATFORMMETHOD(platform_smp_start_cpu,  ps3_smp_start_cpu),
            PLATFORMMETHOD(platform_smp_probe_threads,      ps3_smp_probe_threads),
            PLATFORMMETHOD(platform_smp_topo,       ps3_smp_topo),
    #endif
    
            PLATFORMMETHOD(platform_reset,          ps3_reset),
    
            PLATFORMMETHOD_END
    };
    
   static platform_def_t ps3_platform = {
           "ps3",
           ps3_methods,
           0
   };
   
   PLATFORM_DEF(ps3_platform);
   
   static int ps3_boot_pir = 0;
   
   static int
   ps3_probe(platform_t plat)
   {
           phandle_t root;
           char compatible[64];
   
           root = OF_finddevice("/");
           if (OF_getprop(root, "compatible", compatible, sizeof(compatible)) <= 0)
                   return (BUS_PROBE_NOWILDCARD);
   
           if (strncmp(compatible, "sony,ps3", sizeof(compatible)) != 0)
                   return (BUS_PROBE_NOWILDCARD);
   
           return (BUS_PROBE_SPECIFIC);
   }
   
   static int
   ps3_attach(platform_t plat)
   {
   
           pmap_mmu_install("mmu_ps3", BUS_PROBE_SPECIFIC);
           cpu_idle_hook = ps3_cpu_idle;
   
           /* Record our PIR at boot for later */
           ps3_boot_pir = mfspr(SPR_PIR);
   
           return (0);
   }
   
   void
   ps3_mem_regions(platform_t plat, struct mem_region *phys, int *physsz,
       struct mem_region *avail_regions, int *availsz)
   {
           uint64_t lpar_id, junk;
           int i;
   
           /* Prefer device tree information if available */
           if (OF_finddevice("/") != -1) {
                   ofw_mem_regions(phys, physsz, avail_regions, availsz);
           } else {
                   /* Real mode memory region is first segment */
                   phys[0].mr_start = 0;
                   phys[0].mr_size = ps3_real_maxaddr(plat);
                   *physsz = *availsz = 1;
                   avail_regions[0] = phys[0];
           }
   
           /* Now get extended memory region */
           lv1_get_logical_partition_id(&lpar_id);
           lv1_get_repository_node_value(lpar_id,
               lv1_repository_string("bi") >> 32,
               lv1_repository_string("rgntotal"), 0, 0,
               &phys[*physsz].mr_size, &junk);
           for (i = 0; i < *physsz; i++)
                   phys[*physsz].mr_size -= phys[i].mr_size;
   
           /* Convert to maximum amount we can allocate in 16 MB pages */
           phys[*physsz].mr_size -= phys[*physsz].mr_size % (16*1024*1024);
   
           /* Allocate extended memory region */
           lv1_allocate_memory(phys[*physsz].mr_size, 24 /* 16 MB pages */,
               0, 0x04 /* any address */, &phys[*physsz].mr_start, &junk);
           avail_regions[*availsz] = phys[*physsz];
           (*physsz)++;
           (*availsz)++;
   }
   
   static u_long
   ps3_timebase_freq(platform_t plat, struct cpuref *cpuref)
   {
           uint64_t ticks, node_id, junk;
   
           lv1_get_repository_node_value(PS3_LPAR_ID_PME, 
               lv1_repository_string("be") >> 32, 0, 0, 0, &node_id, &junk);
           lv1_get_repository_node_value(PS3_LPAR_ID_PME,
               lv1_repository_string("be") >> 32, node_id,
               lv1_repository_string("clock"), 0, &ticks, &junk);
   
           return (ticks);
   }
   
   #ifdef SMP
   static int
   ps3_smp_first_cpu(platform_t plat, struct cpuref *cpuref)
   {
   
           cpuref->cr_cpuid = 0;
           cpuref->cr_hwref = ps3_boot_pir;
   
           return (0);
   }
   
   static int
   ps3_smp_next_cpu(platform_t plat, struct cpuref *cpuref)
   {
   
           if (cpuref->cr_cpuid >= 1)
                   return (ENOENT);
   
           cpuref->cr_cpuid++;
           cpuref->cr_hwref = !ps3_boot_pir;
   
           return (0);
   }
   
   static int
   ps3_smp_get_bsp(platform_t plat, struct cpuref *cpuref)
   {
   
           cpuref->cr_cpuid = 0;
           cpuref->cr_hwref = ps3_boot_pir;
   
           return (0);
   }
   
   static int
   ps3_smp_start_cpu(platform_t plat, struct pcpu *pc)
   {
           /* kernel is spinning on 0x40 == -1 right now */
           volatile uint32_t *secondary_spin_sem =
               (uint32_t *)PHYS_TO_DMAP((uintptr_t)0x40);
           int remote_pir = pc->pc_hwref;
           int timeout;
   
           ap_pcpu = pc;
   
           /* Try both PIR values, looping a few times: the HV likes moving us */
           timeout = 10000;
           while (!pc->pc_awake && timeout--) {
                   *secondary_spin_sem = remote_pir;
                   powerpc_sync();
                   DELAY(100);
                   remote_pir = !remote_pir;
           }
   
           return ((pc->pc_awake) ? 0 : EBUSY);
   }
   
   static void
   ps3_smp_probe_threads(platform_t plat)
   {
           mp_ncores = 1;
           smp_threads_per_core = 2;
   }
   
   static struct cpu_group *
   ps3_smp_topo(platform_t plat)
   {
           return (smp_topo_1level(CG_SHARE_L1, 2, CG_FLAG_SMT));
   }
   #endif
   
   static void
   ps3_reset(platform_t plat)
   {
           lv1_panic(1);
   }
   
   static vm_offset_t
   ps3_real_maxaddr(platform_t plat)
   {
           uint64_t lpar_id, junk, ppe_id;
           static uint64_t rm_maxaddr = 0;
   
           if (rm_maxaddr == 0) {
                   /* Get real mode memory region */
                   lv1_get_logical_partition_id(&lpar_id);
                   lv1_get_logical_ppe_id(&ppe_id);
   
                   lv1_get_repository_node_value(lpar_id,
                       lv1_repository_string("bi") >> 32,
                       lv1_repository_string("pu"),
                       ppe_id, lv1_repository_string("rm_size"),
                       &rm_maxaddr, &junk);
           }
   
           return (rm_maxaddr);
   }
   
   static void
   ps3_cpu_idle(sbintime_t sbt)
   {
           lv1_pause(0);
   }

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