powerpc: Merge smp.c and smp.h

This also moves setup_cpu_maps to setup-common.c (calling it
smp_setup_cpu_maps) and uses it on both 32-bit and 64-bit.

Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 6 insertions, 114 deletions

diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 275d86ddd612..6b52cce872be 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -181,114 +181,8 @@ 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;
@@ -417,6 +311,8 @@ void smp_release_cpus(void)
 
         DBG(" <- smp_release_cpus()\n");
 }
+#else
+#define smp_release_cpus()
 #endif /* CONFIG_SMP || CONFIG_KEXEC */
 
 /*
@@ -608,17 +504,13 @@ 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);