Auto-update from upstream

1 files changed, 50 insertions, 149 deletions

diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 40c48100bf1b..b0994050024f 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -56,7 +56,7 @@
 #include <asm/page.h>
 #include <asm/mmu.h>
 #include <asm/lmb.h>
-#include <asm/iSeries/ItLpNaca.h>
+#include <asm/iseries/it_lp_naca.h>
 #include <asm/firmware.h>
 #include <asm/systemcfg.h>
 #include <asm/xmon.h>
@@ -103,8 +103,6 @@ extern void htab_initialize(void);
 extern void early_init_devtree(void *flat_dt);
 extern void unflatten_device_tree(void);
 
-extern void smp_release_cpus(void);
-
 int have_of = 1;
 int boot_cpuid = 0;
 int boot_cpuid_phys = 0;
@@ -183,120 +181,14 @@ static int __init early_smt_enabled(char *p)
 }
 early_param("smt-enabled", early_smt_enabled);
 
-/**
- * setup_cpu_maps - initialize the following cpu maps:
- *                  cpu_possible_map
- *                  cpu_present_map
- *                  cpu_sibling_map
- *
- * Having the possible map set up early allows us to restrict allocations
- * of things like irqstacks to num_possible_cpus() rather than NR_CPUS.
- *
- * We do not initialize the online map here; cpus set their own bits in
- * cpu_online_map as they come up.
- *
- * This function is valid only for Open Firmware systems.  finish_device_tree
- * must be called before using this.
- *
- * While we're here, we may as well set the "physical" cpu ids in the paca.
- */
-static void __init setup_cpu_maps(void)
-{
-        struct device_node *dn = NULL;
-        int cpu = 0;
-        int swap_cpuid = 0;
-
-        check_smt_enabled();
-
-        while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) {
-                u32 *intserv;
-                int j, len = sizeof(u32), nthreads;
-
-                intserv = (u32 *)get_property(dn, "ibm,ppc-interrupt-server#s",
-                                              &len);
-                if (!intserv)
-                        intserv = (u32 *)get_property(dn, "reg", NULL);
-
-                nthreads = len / sizeof(u32);
-
-                for (j = 0; j < nthreads && cpu < NR_CPUS; j++) {
-                        cpu_set(cpu, cpu_present_map);
-                        set_hard_smp_processor_id(cpu, intserv[j]);
-
-                        if (intserv[j] == boot_cpuid_phys)
-                                swap_cpuid = cpu;
-                        cpu_set(cpu, cpu_possible_map);
-                        cpu++;
-                }
-        }
-
-        /* Swap CPU id 0 with boot_cpuid_phys, so we can always assume that
-         * boot cpu is logical 0.
-         */
-        if (boot_cpuid_phys != get_hard_smp_processor_id(0)) {
-                u32 tmp;
-                tmp = get_hard_smp_processor_id(0);
-                set_hard_smp_processor_id(0, boot_cpuid_phys);
-                set_hard_smp_processor_id(swap_cpuid, tmp);
-        }
-
-        /*
-         * On pSeries LPAR, we need to know how many cpus
-         * could possibly be added to this partition.
-         */
-        if (systemcfg->platform == PLATFORM_PSERIES_LPAR &&
-                                (dn = of_find_node_by_path("/rtas"))) {
-                int num_addr_cell, num_size_cell, maxcpus;
-                unsigned int *ireg;
-
-                num_addr_cell = prom_n_addr_cells(dn);
-                num_size_cell = prom_n_size_cells(dn);
-
-                ireg = (unsigned int *)
-                        get_property(dn, "ibm,lrdr-capacity", NULL);
-
-                if (!ireg)
-                        goto out;
-
-                maxcpus = ireg[num_addr_cell + num_size_cell];
-
-                /* Double maxcpus for processors which have SMT capability */
-                if (cpu_has_feature(CPU_FTR_SMT))
-                        maxcpus *= 2;
-
-                if (maxcpus > NR_CPUS) {
-                        printk(KERN_WARNING
-                               "Partition configured for %d cpus, "
-                               "operating system maximum is %d.\n",
-                               maxcpus, NR_CPUS);
-                        maxcpus = NR_CPUS;
-                } else
-                        printk(KERN_INFO "Partition configured for %d cpus.\n",
-                               maxcpus);
-
-                for (cpu = 0; cpu < maxcpus; cpu++)
-                        cpu_set(cpu, cpu_possible_map);
-        out:
-                of_node_put(dn);
-        }
-
-        /*
-         * Do the sibling map; assume only two threads per processor.
-         */
-        for_each_cpu(cpu) {
-                cpu_set(cpu, cpu_sibling_map[cpu]);
-                if (cpu_has_feature(CPU_FTR_SMT))
-                        cpu_set(cpu ^ 0x1, cpu_sibling_map[cpu]);
-        }
-
-        systemcfg->processorCount = num_present_cpus();
-}
+#else
+#define check_smt_enabled()
 #endif /* CONFIG_SMP */
 
 extern struct machdep_calls pSeries_md;
 extern struct machdep_calls pmac_md;
 extern struct machdep_calls maple_md;
-extern struct machdep_calls bpa_md;
+extern struct machdep_calls cell_md;
 extern struct machdep_calls iseries_md;
 
 /* Ultimately, stuff them in an elf section like initcalls... */
@@ -310,8 +202,8 @@ static struct machdep_calls __initdata *machines[] = {
 #ifdef CONFIG_PPC_MAPLE
         &maple_md,
 #endif /* CONFIG_PPC_MAPLE */
-#ifdef CONFIG_PPC_BPA
-        &bpa_md,
+#ifdef CONFIG_PPC_CELL
+        &cell_md,
 #endif
 #ifdef CONFIG_PPC_ISERIES
         &iseries_md,
@@ -385,21 +277,49 @@ void __init early_setup(unsigned long dt_ptr)
         DBG("Found, Initializing memory management...\n");
 
         /*
-         * Initialize stab / SLB management
+         * Initialize the MMU Hash table and create the linear mapping
+         * of memory. Has to be done before stab/slb initialization as
+         * this is currently where the page size encoding is obtained
          */
-        if (!firmware_has_feature(FW_FEATURE_ISERIES))
-                stab_initialize(lpaca->stab_real);
+        htab_initialize();
 
         /*
-         * Initialize the MMU Hash table and create the linear mapping
-         * of memory
+         * Initialize stab / SLB management except on iSeries
          */
-        htab_initialize();
+        if (!firmware_has_feature(FW_FEATURE_ISERIES)) {
+                if (cpu_has_feature(CPU_FTR_SLB))
+                        slb_initialize();
+                else
+                        stab_initialize(lpaca->stab_real);
+        }
 
         DBG(" <- early_setup()\n");
 }
 
 
+#if defined(CONFIG_SMP) || defined(CONFIG_KEXEC)
+void smp_release_cpus(void)
+{
+        extern unsigned long __secondary_hold_spinloop;
+
+        DBG(" -> smp_release_cpus()\n");
+
+        /* All secondary cpus are spinning on a common spinloop, release them
+         * all now so they can start to spin on their individual paca
+         * spinloops. For non SMP kernels, the secondary cpus never get out
+         * of the common spinloop.
+         * This is useless but harmless on iSeries, secondaries are already
+         * waiting on their paca spinloops. */
+
+        __secondary_hold_spinloop = 1;
+        mb();
+
+        DBG(" <- smp_release_cpus()\n");
+}
+#else
+#define smp_release_cpus()
+#endif /* CONFIG_SMP || CONFIG_KEXEC */
+
 /*
  * Initialize some remaining members of the ppc64_caches and systemcfg structures
  * (at least until we get rid of them completely). This is mostly some
@@ -589,17 +509,13 @@ void __init setup_system(void)
 
         parse_early_param();
 
-#ifdef CONFIG_SMP
-        /*
-         * iSeries has already initialized the cpu maps at this point.
-         */
-        setup_cpu_maps();
+        check_smt_enabled();
+        smp_setup_cpu_maps();
 
         /* Release secondary cpus out of their spinloops at 0x60 now that
          * we can map physical -> logical CPU ids
          */
         smp_release_cpus();
-#endif
 
         printk("Starting Linux PPC64 %s\n", system_utsname.version);
 
@@ -631,23 +547,6 @@ static int ppc64_panic_event(struct notifier_block *this,
         return NOTIFY_DONE;
 }
 
-#ifdef CONFIG_PPC_ISERIES
-/*
- * On iSeries we just parse the mem=X option from the command line.
- * On pSeries it's a bit more complicated, see prom_init_mem()
- */
-static int __init early_parsemem(char *p)
-{
-        if (!p)
-                return 0;
-
-        memory_limit = ALIGN(memparse(p, &p), PAGE_SIZE);
-
-        return 0;
-}
-early_param("mem", early_parsemem);
-#endif /* CONFIG_PPC_ISERIES */
-
 #ifdef CONFIG_IRQSTACKS
 static void __init irqstack_early_init(void)
 {
@@ -658,10 +557,12 @@ static void __init irqstack_early_init(void)
          * SLB misses on them.
          */
         for_each_cpu(i) {
-                softirq_ctx[i] = (struct thread_info *)__va(lmb_alloc_base(THREAD_SIZE,
-                                        THREAD_SIZE, 0x10000000));
-                hardirq_ctx[i] = (struct thread_info *)__va(lmb_alloc_base(THREAD_SIZE,
-                                        THREAD_SIZE, 0x10000000));
+                softirq_ctx[i] = (struct thread_info *)
+                        __va(lmb_alloc_base(THREAD_SIZE,
+                                            THREAD_SIZE, 0x10000000));
+                hardirq_ctx[i] = (struct thread_info *)
+                        __va(lmb_alloc_base(THREAD_SIZE,
+                                            THREAD_SIZE, 0x10000000));
         }
 }
 #else
@@ -689,8 +590,8 @@ static void __init emergency_stack_init(void)
         limit = min(0x10000000UL, lmb.rmo_size);
 
         for_each_cpu(i)
-                paca[i].emergency_sp = __va(lmb_alloc_base(PAGE_SIZE, 128,
-                                                limit)) + PAGE_SIZE;
+                paca[i].emergency_sp =
+                __va(lmb_alloc_base(HW_PAGE_SIZE, 128, limit)) + HW_PAGE_SIZE;
 }
 
 /*