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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/arch/powerpc/platforms/pseries/smp.c
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/arch/powerpc/platforms/pseries/smp.c')
-rw-r--r--ANDROID_3.4.5/arch/powerpc/platforms/pseries/smp.c258
1 files changed, 0 insertions, 258 deletions
diff --git a/ANDROID_3.4.5/arch/powerpc/platforms/pseries/smp.c b/ANDROID_3.4.5/arch/powerpc/platforms/pseries/smp.c
deleted file mode 100644
index e16bb8d4..00000000
--- a/ANDROID_3.4.5/arch/powerpc/platforms/pseries/smp.c
+++ /dev/null
@@ -1,258 +0,0 @@
-/*
- * SMP support for pSeries machines.
- *
- * Dave Engebretsen, Peter Bergner, and
- * Mike Corrigan {engebret|bergner|mikec}@us.ibm.com
- *
- * Plus various changes from other IBM teams...
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/smp.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <linux/init.h>
-#include <linux/spinlock.h>
-#include <linux/cache.h>
-#include <linux/err.h>
-#include <linux/device.h>
-#include <linux/cpu.h>
-
-#include <asm/ptrace.h>
-#include <linux/atomic.h>
-#include <asm/irq.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/io.h>
-#include <asm/prom.h>
-#include <asm/smp.h>
-#include <asm/paca.h>
-#include <asm/machdep.h>
-#include <asm/cputable.h>
-#include <asm/firmware.h>
-#include <asm/rtas.h>
-#include <asm/pSeries_reconfig.h>
-#include <asm/mpic.h>
-#include <asm/vdso_datapage.h>
-#include <asm/cputhreads.h>
-#include <asm/xics.h>
-
-#include "plpar_wrappers.h"
-#include "pseries.h"
-#include "offline_states.h"
-
-
-/*
- * The Primary thread of each non-boot processor was started from the OF client
- * interface by prom_hold_cpus and is spinning on secondary_hold_spinloop.
- */
-static cpumask_var_t of_spin_mask;
-
-/* Query where a cpu is now. Return codes #defined in plpar_wrappers.h */
-int smp_query_cpu_stopped(unsigned int pcpu)
-{
- int cpu_status, status;
- int qcss_tok = rtas_token("query-cpu-stopped-state");
-
- if (qcss_tok == RTAS_UNKNOWN_SERVICE) {
- printk_once(KERN_INFO
- "Firmware doesn't support query-cpu-stopped-state\n");
- return QCSS_HARDWARE_ERROR;
- }
-
- status = rtas_call(qcss_tok, 1, 2, &cpu_status, pcpu);
- if (status != 0) {
- printk(KERN_ERR
- "RTAS query-cpu-stopped-state failed: %i\n", status);
- return status;
- }
-
- return cpu_status;
-}
-
-/**
- * smp_startup_cpu() - start the given cpu
- *
- * At boot time, there is nothing to do for primary threads which were
- * started from Open Firmware. For anything else, call RTAS with the
- * appropriate start location.
- *
- * Returns:
- * 0 - failure
- * 1 - success
- */
-static inline int __devinit smp_startup_cpu(unsigned int lcpu)
-{
- int status;
- unsigned long start_here = __pa((u32)*((unsigned long *)
- generic_secondary_smp_init));
- unsigned int pcpu;
- int start_cpu;
-
- if (cpumask_test_cpu(lcpu, of_spin_mask))
- /* Already started by OF and sitting in spin loop */
- return 1;
-
- pcpu = get_hard_smp_processor_id(lcpu);
-
- /* Check to see if the CPU out of FW already for kexec */
- if (smp_query_cpu_stopped(pcpu) == QCSS_NOT_STOPPED){
- cpumask_set_cpu(lcpu, of_spin_mask);
- return 1;
- }
-
- /* Fixup atomic count: it exited inside IRQ handler. */
- task_thread_info(paca[lcpu].__current)->preempt_count = 0;
-#ifdef CONFIG_HOTPLUG_CPU
- if (get_cpu_current_state(lcpu) == CPU_STATE_INACTIVE)
- goto out;
-#endif
- /*
- * If the RTAS start-cpu token does not exist then presume the
- * cpu is already spinning.
- */
- start_cpu = rtas_token("start-cpu");
- if (start_cpu == RTAS_UNKNOWN_SERVICE)
- return 1;
-
- status = rtas_call(start_cpu, 3, 1, NULL, pcpu, start_here, pcpu);
- if (status != 0) {
- printk(KERN_ERR "start-cpu failed: %i\n", status);
- return 0;
- }
-
-#ifdef CONFIG_HOTPLUG_CPU
-out:
-#endif
- return 1;
-}
-
-static void __devinit smp_xics_setup_cpu(int cpu)
-{
- if (cpu != boot_cpuid)
- xics_setup_cpu();
-
- if (firmware_has_feature(FW_FEATURE_SPLPAR))
- vpa_init(cpu);
-
- cpumask_clear_cpu(cpu, of_spin_mask);
-#ifdef CONFIG_HOTPLUG_CPU
- set_cpu_current_state(cpu, CPU_STATE_ONLINE);
- set_default_offline_state(cpu);
-#endif
- pseries_notify_cpuidle_add_cpu(cpu);
-}
-
-static int __devinit smp_pSeries_kick_cpu(int nr)
-{
- BUG_ON(nr < 0 || nr >= NR_CPUS);
-
- if (!smp_startup_cpu(nr))
- return -ENOENT;
-
- /*
- * The processor is currently spinning, waiting for the
- * cpu_start field to become non-zero After we set cpu_start,
- * the processor will continue on to secondary_start
- */
- paca[nr].cpu_start = 1;
-#ifdef CONFIG_HOTPLUG_CPU
- set_preferred_offline_state(nr, CPU_STATE_ONLINE);
-
- if (get_cpu_current_state(nr) == CPU_STATE_INACTIVE) {
- long rc;
- unsigned long hcpuid;
-
- hcpuid = get_hard_smp_processor_id(nr);
- rc = plpar_hcall_norets(H_PROD, hcpuid);
- if (rc != H_SUCCESS)
- printk(KERN_ERR "Error: Prod to wake up processor %d "
- "Ret= %ld\n", nr, rc);
- }
-#endif
-
- return 0;
-}
-
-static int smp_pSeries_cpu_bootable(unsigned int nr)
-{
- /* Special case - we inhibit secondary thread startup
- * during boot if the user requests it.
- */
- if (system_state < SYSTEM_RUNNING && cpu_has_feature(CPU_FTR_SMT)) {
- if (!smt_enabled_at_boot && cpu_thread_in_core(nr) != 0)
- return 0;
- if (smt_enabled_at_boot
- && cpu_thread_in_core(nr) >= smt_enabled_at_boot)
- return 0;
- }
-
- return 1;
-}
-
-static struct smp_ops_t pSeries_mpic_smp_ops = {
- .message_pass = smp_mpic_message_pass,
- .probe = smp_mpic_probe,
- .kick_cpu = smp_pSeries_kick_cpu,
- .setup_cpu = smp_mpic_setup_cpu,
-};
-
-static struct smp_ops_t pSeries_xics_smp_ops = {
- .message_pass = NULL, /* Use smp_muxed_ipi_message_pass */
- .cause_ipi = NULL, /* Filled at runtime by xics_smp_probe() */
- .probe = xics_smp_probe,
- .kick_cpu = smp_pSeries_kick_cpu,
- .setup_cpu = smp_xics_setup_cpu,
- .cpu_bootable = smp_pSeries_cpu_bootable,
-};
-
-/* This is called very early */
-static void __init smp_init_pseries(void)
-{
- int i;
-
- pr_debug(" -> smp_init_pSeries()\n");
-
- alloc_bootmem_cpumask_var(&of_spin_mask);
-
- /* Mark threads which are still spinning in hold loops. */
- if (cpu_has_feature(CPU_FTR_SMT)) {
- for_each_present_cpu(i) {
- if (cpu_thread_in_core(i) == 0)
- cpumask_set_cpu(i, of_spin_mask);
- }
- } else {
- cpumask_copy(of_spin_mask, cpu_present_mask);
- }
-
- cpumask_clear_cpu(boot_cpuid, of_spin_mask);
-
- /* Non-lpar has additional take/give timebase */
- if (rtas_token("freeze-time-base") != RTAS_UNKNOWN_SERVICE) {
- smp_ops->give_timebase = rtas_give_timebase;
- smp_ops->take_timebase = rtas_take_timebase;
- }
-
- pr_debug(" <- smp_init_pSeries()\n");
-}
-
-void __init smp_init_pseries_mpic(void)
-{
- smp_ops = &pSeries_mpic_smp_ops;
-
- smp_init_pseries();
-}
-
-void __init smp_init_pseries_xics(void)
-{
- smp_ops = &pSeries_xics_smp_ops;
-
- smp_init_pseries();
-}