obj-$(CONFIG_MODULES) += ppc_ksyms.o
obj-$(CONFIG_BOOTX_TEXT) += btext.o
obj-$(CONFIG_6xx) += idle_6xx.o
+obj-$(CONFIG_SMP) += smp.o
ifeq ($(CONFIG_PPC_ISERIES),y)
$(obj)/head_64.o: $(obj)/lparmap.s
else
# stuff used from here for ARCH=ppc or ARCH=ppc64
+smpobj-$(CONFIG_SMP) += smp.o
obj-$(CONFIG_PPC64) += traps.o process.o init_task.o time.o \
- setup-common.o
+ setup-common.o $(smpobj-y)
endif
}
#ifdef CONFIG_SMP
-#ifdef CONFIG_PPC64 /* XXX for now */
pvr = per_cpu(pvr, cpu_id);
#else
- pvr = cpu_data[cpu_id].pvr;
-#endif
-#else
pvr = mfspr(SPRN_PVR);
#endif
maj = (pvr >> 8) & 0xFF;
}
console_initcall(set_preferred_console);
#endif /* CONFIG_PPC_MULTIPLATFORM */
+
+#ifdef CONFIG_SMP
+
+/**
+ * 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.
+ */
+void __init smp_setup_cpu_maps(void)
+{
+ struct device_node *dn = NULL;
+ int cpu = 0;
+ int swap_cpuid = 0;
+
+ while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) {
+ int *intserv;
+ int j, len = sizeof(u32), nthreads = 1;
+
+ intserv = (int *)get_property(dn, "ibm,ppc-interrupt-server#s",
+ &len);
+ if (intserv)
+ nthreads = len / sizeof(int);
+ else {
+ intserv = (int *) get_property(dn, "reg", NULL);
+ if (!intserv)
+ intserv = &cpu; /* assume logical == phys */
+ }
+
+ 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);
+ }
+
+#ifdef CONFIG_PPC64
+ /*
+ * 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();
+#endif /* CONFIG_PPC64 */
+}
+#endif /* CONFIG_SMP */
unflatten_device_tree();
finish_device_tree();
+ smp_setup_cpu_maps();
+
#ifdef CONFIG_BOOTX_TEXT
init_boot_display();
#endif
}
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;
DBG(" <- smp_release_cpus()\n");
}
+#else
+#define smp_release_cpus()
#endif /* CONFIG_SMP || CONFIG_KEXEC */
/*
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);
#include <asm/pgtable.h>
#include <asm/prom.h>
#include <asm/smp.h>
-#include <asm/paca.h>
#include <asm/time.h>
+#include <asm/xmon.h>
#include <asm/machdep.h>
#include <asm/cputable.h>
#include <asm/system.h>
-#include <asm/abs_addr.h>
#include <asm/mpic.h>
+#ifdef CONFIG_PPC64
+#include <asm/paca.h>
+#endif
+
+int smp_hw_index[NR_CPUS];
+struct thread_info *secondary_ti;
#ifdef DEBUG
#define DBG(fmt...) udbg_printf(fmt)
EXPORT_SYMBOL(cpu_online_map);
EXPORT_SYMBOL(cpu_possible_map);
+/* SMP operations for this machine */
struct smp_ops_t *smp_ops;
static volatile unsigned int cpu_callin_map[NR_CPUS];
{
mpic_setup_this_cpu();
}
+#endif /* CONFIG_MPIC */
+#ifdef CONFIG_PPC64
void __devinit smp_generic_kick_cpu(int nr)
{
BUG_ON(nr < 0 || nr >= NR_CPUS);
paca[nr].cpu_start = 1;
smp_mb();
}
-
-#endif /* CONFIG_MPIC */
+#endif
void smp_message_recv(int msg, struct pt_regs *regs)
{
case PPC_MSG_CALL_FUNCTION:
smp_call_function_interrupt();
break;
- case PPC_MSG_RESCHEDULE:
+ case PPC_MSG_RESCHEDULE:
/* XXX Do we have to do this? */
set_need_resched();
break;
-#if 0
- case PPC_MSG_MIGRATE_TASK:
- /* spare */
- break;
-#endif
#ifdef CONFIG_DEBUGGER
case PPC_MSG_DEBUGGER_BREAK:
debugger_ipi(regs);
int wait;
} *call_data;
-/* delay of at least 8 seconds on 1GHz cpu */
-#define SMP_CALL_TIMEOUT (1UL << (30 + 3))
+/* delay of at least 8 seconds */
+#define SMP_CALL_TIMEOUT 8
/*
* This function sends a 'generic call function' IPI to all other CPUs
{
struct call_data_struct data;
int ret = -1, cpus;
- unsigned long timeout;
+ u64 timeout;
/* Can deadlock when called with interrupts disabled */
WARN_ON(irqs_disabled());
/* Send a message to all other CPUs and wait for them to respond */
smp_ops->message_pass(MSG_ALL_BUT_SELF, PPC_MSG_CALL_FUNCTION);
+ timeout = get_tb() + (u64) SMP_CALL_TIMEOUT * tb_ticks_per_sec;
+
/* Wait for response */
- timeout = SMP_CALL_TIMEOUT;
while (atomic_read(&data.started) != cpus) {
HMT_low();
- if (--timeout == 0) {
+ if (get_tb() >= timeout) {
printk("smp_call_function on cpu %d: other cpus not "
"responding (%d)\n", smp_processor_id(),
atomic_read(&data.started));
}
if (wait) {
- timeout = SMP_CALL_TIMEOUT;
while (atomic_read(&data.finished) != cpus) {
HMT_low();
- if (--timeout == 0) {
+ if (get_tb() >= timeout) {
printk("smp_call_function on cpu %d: other "
"cpus not finishing (%d/%d)\n",
smp_processor_id(),
ret = 0;
-out:
+ out:
call_data = NULL;
HMT_medium();
spin_unlock(&call_lock);
p = fork_idle(cpu);
if (IS_ERR(p))
panic("failed fork for CPU %u: %li", cpu, PTR_ERR(p));
+#ifdef CONFIG_PPC64
paca[cpu].__current = p;
+#endif
current_set[cpu] = p->thread_info;
+ p->thread_info->cpu = cpu;
}
void __init smp_prepare_cpus(unsigned int max_cpus)
smp_store_cpu_info(boot_cpuid);
cpu_callin_map[boot_cpuid] = 1;
-#ifndef CONFIG_PPC_ISERIES
- paca[boot_cpuid].next_jiffy_update_tb = tb_last_stamp = get_tb();
-
- /*
- * Should update do_gtod.stamp_xsec.
- * For now we leave it which means the time can be some
- * number of msecs off until someone does a settimeofday()
- */
- do_gtod.varp->tb_orig_stamp = tb_last_stamp;
- systemcfg->tb_orig_stamp = tb_last_stamp;
-#endif
-
max_cpus = smp_ops->probe();
smp_space_timers(max_cpus);
BUG_ON(smp_processor_id() != boot_cpuid);
cpu_set(boot_cpuid, cpu_online_map);
-
+#ifdef CONFIG_PPC64
paca[boot_cpuid].__current = current;
+#endif
current_set[boot_cpuid] = current->thread_info;
}
{
int c;
+ secondary_ti = current_set[cpu];
if (!cpu_enable(cpu))
return 0;
if (smp_ops->cpu_bootable && !smp_ops->cpu_bootable(cpu))
return -EINVAL;
+#ifdef CONFIG_PPC64
paca[cpu].default_decr = tb_ticks_per_jiffy;
+#endif
/* Make sure callin-map entry is 0 (can be leftover a CPU
* hotplug
current->active_mm = &init_mm;
smp_store_cpu_info(cpu);
- set_dec(paca[cpu].default_decr);
+ set_dec(tb_ticks_per_jiffy);
cpu_callin_map[cpu] = 1;
smp_ops->setup_cpu(cpu);
#include <asm/smp.h>
#include <asm/mpic.h>
-extern unsigned long smp_chrp_cpu_nr;
-
-static int __init smp_chrp_probe(void)
-{
- struct device_node *cpus = NULL;
- unsigned int *reg;
- int reglen;
- int ncpus = 0;
- int cpuid;
- unsigned int phys;
-
- /* Count CPUs in the device-tree */
- cpuid = 1; /* the boot cpu is logical cpu 0 */
- while ((cpus = of_find_node_by_type(cpus, "cpu")) != NULL) {
- phys = ncpus;
- reg = (unsigned int *) get_property(cpus, "reg", ®len);
- if (reg && reglen >= sizeof(unsigned int))
- /* hmmm, not having a reg property would be bad */
- phys = *reg;
- if (phys != boot_cpuid_phys) {
- set_hard_smp_processor_id(cpuid, phys);
- ++cpuid;
- }
- ++ncpus;
- }
-
- printk(KERN_INFO "CHRP SMP probe found %d cpus\n", ncpus);
-
- /* Nothing more to do if less than 2 of them */
- if (ncpus <= 1)
- return 1;
-
- mpic_request_ipis();
-
- return ncpus;
-}
-
static void __devinit smp_chrp_kick_cpu(int nr)
{
*(unsigned long *)KERNELBASE = nr;
/* CHRP with openpic */
struct smp_ops_t chrp_smp_ops = {
.message_pass = smp_mpic_message_pass,
- .probe = smp_chrp_probe,
+ .probe = smp_mpic_probe,
.kick_cpu = smp_chrp_kick_cpu,
.setup_cpu = smp_chrp_setup_cpu,
.give_timebase = smp_chrp_give_timebase,
obj-$(CONFIG_NOT_COHERENT_CACHE) += dma-mapping.o
obj-$(CONFIG_PCI) += pci.o
obj-$(CONFIG_KGDB) += ppc-stub.o
-obj-$(CONFIG_SMP) += smp.o smp-tbsync.o
obj-$(CONFIG_TAU) += temp.o
ifndef CONFIG_E200
obj-$(CONFIG_FSL_BOOKE) += perfmon_fsl_booke.o
seq_puts(p, " PowerPC Thermal Assist (cpu temp)\n");
}
#endif
-#ifdef CONFIG_SMP
+#if defined(CONFIG_SMP) && !defined(CONFIG_PPC_MERGE)
/* should this be per processor send/receive? */
seq_printf(p, "IPI (recv/sent): %10u/%u\n",
atomic_read(&ipi_recv), atomic_read(&ipi_sent));
obj-$(CONFIG_KEXEC) += machine_kexec.o
obj-$(CONFIG_EEH) += eeh.o
obj-$(CONFIG_PROC_FS) += proc_ppc64.o
-obj-$(CONFIG_SMP) += smp.o
obj-$(CONFIG_MODULES) += module.o
ifneq ($(CONFIG_PPC_MERGE),y)
obj-$(CONFIG_MODULES) += ppc_ksyms.o
/*
- * smp.h: PPC64 specific SMP code.
+ * smp.h: PowerPC-specific SMP code.
*
* Original was a copy of sparc smp.h. Now heavily modified
* for PPC.
* 2 of the License, or (at your option) any later version.
*/
+#ifndef _ASM_POWERPC_SMP_H
+#define _ASM_POWERPC_SMP_H
#ifdef __KERNEL__
-#ifndef _PPC64_SMP_H
-#define _PPC64_SMP_H
#include <linux/config.h>
#include <linux/threads.h>
#ifndef __ASSEMBLY__
+#ifdef CONFIG_PPC64
#include <asm/paca.h>
+#endif
extern int boot_cpuid;
extern int boot_cpuid_phys;
void generic_mach_cpu_die(void);
#endif
+#ifdef CONFIG_PPC64
#define raw_smp_processor_id() (get_paca()->paca_index)
#define hard_smp_processor_id() (get_paca()->hw_cpu_id)
+#else
+/* 32-bit */
+extern int smp_hw_index[];
+
+#define raw_smp_processor_id() (current_thread_info()->cpu)
+#define hard_smp_processor_id() (smp_hw_index[smp_processor_id()])
+#define get_hard_smp_processor_id(cpu) (smp_hw_index[(cpu)])
+#define set_hard_smp_processor_id(cpu, phys)\
+ (smp_hw_index[(cpu)] = (phys))
+#endif
extern cpumask_t cpu_sibling_map[NR_CPUS];
void smp_init_iSeries(void);
void smp_init_pSeries(void);
void smp_init_cell(void);
+void smp_setup_cpu_maps(void);
extern int __cpu_disable(void);
extern void __cpu_die(unsigned int cpu);
+
+#else
+/* for UP */
+#define smp_setup_cpu_maps()
+#define smp_release_cpus()
+
#endif /* CONFIG_SMP */
+#ifdef CONFIG_PPC64
#define get_hard_smp_processor_id(CPU) (paca[(CPU)].hw_cpu_id)
#define set_hard_smp_processor_id(CPU, VAL) \
do { (paca[(CPU)].hw_cpu_id = (VAL)); } while (0)
+#else
+/* 32-bit */
+#ifndef CONFIG_SMP
+#define get_hard_smp_processor_id(cpu) boot_cpuid_phys
+#define set_hard_smp_processor_id(cpu, phys)
+#endif
+#endif
extern int smt_enabled_at_boot;
extern int smp_mpic_probe(void);
extern void smp_mpic_setup_cpu(int cpu);
extern void smp_generic_kick_cpu(int nr);
-extern void smp_release_cpus(void);
extern void smp_generic_give_timebase(void);
extern void smp_generic_take_timebase(void);
#endif /* __ASSEMBLY__ */
-#endif /* !(_PPC64_SMP_H) */
#endif /* __KERNEL__ */
+#endif /* _ASM_POWERPC_SMP_H) */
projects / kernel / kernel-generic.git / commitdiff