powerpc: Remove FW_FEATURE ISERIES from arch code

This is no longer selectable, so just remove all the dependent code.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

7 files changed, 15 insertions, 252 deletions

diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index eb804e15b29..45b367c8d8b 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -211,11 +211,6 @@ notrace void arch_local_irq_restore(unsigned long en)
 	 * External interrupt events on non-iseries will have caused
 	 * interrupts to be hard-disabled, so there is no problem, we
 	 * cannot have preempted.
-	 *
-	 * That leaves us with EEs on iSeries or decrementer interrupts,
-	 * which I decided to safely ignore. The preemption would have
-	 * itself been the result of an interrupt, upon which return we
-	 * will have checked for pending events on the old CPU.
 	 */
 	irq_happened = get_irq_happened();
 	if (!irq_happened)
@@ -458,15 +453,6 @@ void do_IRQ(struct pt_regs *regs)
 	irq_exit();
 	set_irq_regs(old_regs);
 
-#ifdef CONFIG_PPC_ISERIES
-	if (firmware_has_feature(FW_FEATURE_ISERIES) &&
-			get_lppaca()->int_dword.fields.decr_int) {
-		get_lppaca()->int_dword.fields.decr_int = 0;
-		/* Signal a fake decrementer interrupt */
-		timer_interrupt(regs);
-	}
-#endif
-
 	trace_irq_exit(regs);
 }
 
diff --git a/arch/powerpc/kernel/isa-bridge.c b/arch/powerpc/kernel/isa-bridge.c
index 479752901ec..d45ec58703c 100644
--- a/arch/powerpc/kernel/isa-bridge.c
+++ b/arch/powerpc/kernel/isa-bridge.c
@@ -29,7 +29,6 @@
 #include <asm/pci-bridge.h>
 #include <asm/machdep.h>
 #include <asm/ppc-pci.h>
-#include <asm/firmware.h>
 
 unsigned long isa_io_base;	/* NULL if no ISA bus */
 EXPORT_SYMBOL(isa_io_base);
@@ -261,8 +260,6 @@ static struct notifier_block isa_bridge_notifier = {
  */
 static int __init isa_bridge_init(void)
 {
-	if (firmware_has_feature(FW_FEATURE_ISERIES))
-		return 0;
 	bus_register_notifier(&pci_bus_type, &isa_bridge_notifier);
 	return 0;
 }
diff --git a/arch/powerpc/kernel/lparcfg.c b/arch/powerpc/kernel/lparcfg.c
index 578f35f1872..ac12bd80ad9 100644
--- a/arch/powerpc/kernel/lparcfg.c
+++ b/arch/powerpc/kernel/lparcfg.c
@@ -26,7 +26,6 @@
 #include <linux/seq_file.h>
 #include <linux/slab.h>
 #include <asm/uaccess.h>
-#include <asm/iseries/hv_lp_config.h>
 #include <asm/lppaca.h>
 #include <asm/hvcall.h>
 #include <asm/firmware.h>
@@ -55,80 +54,14 @@ static unsigned long get_purr(void)
 	int cpu;
 
 	for_each_possible_cpu(cpu) {
-		if (firmware_has_feature(FW_FEATURE_ISERIES))
-			sum_purr += lppaca_of(cpu).emulated_time_base;
-		else {
-			struct cpu_usage *cu;
+		struct cpu_usage *cu;
 
-			cu = &per_cpu(cpu_usage_array, cpu);
-			sum_purr += cu->current_tb;
-		}
+		cu = &per_cpu(cpu_usage_array, cpu);
+		sum_purr += cu->current_tb;
 	}
 	return sum_purr;
 }
 
-#ifdef CONFIG_PPC_ISERIES
-
-/*
- * Methods used to fetch LPAR data when running on an iSeries platform.
- */
-static int iseries_lparcfg_data(struct seq_file *m, void *v)
-{
-	unsigned long pool_id;
-	int shared, entitled_capacity, max_entitled_capacity;
-	int processors, max_processors;
-	unsigned long purr = get_purr();
-
-	shared = (int)(local_paca->lppaca_ptr->shared_proc);
-
-	seq_printf(m, "system_active_processors=%d\n",
-		   (int)HvLpConfig_getSystemPhysicalProcessors());
-
-	seq_printf(m, "system_potential_processors=%d\n",
-		   (int)HvLpConfig_getSystemPhysicalProcessors());
-
-	processors = (int)HvLpConfig_getPhysicalProcessors();
-	seq_printf(m, "partition_active_processors=%d\n", processors);
-
-	max_processors = (int)HvLpConfig_getMaxPhysicalProcessors();
-	seq_printf(m, "partition_potential_processors=%d\n", max_processors);
-
-	if (shared) {
-		entitled_capacity = HvLpConfig_getSharedProcUnits();
-		max_entitled_capacity = HvLpConfig_getMaxSharedProcUnits();
-	} else {
-		entitled_capacity = processors * 100;
-		max_entitled_capacity = max_processors * 100;
-	}
-	seq_printf(m, "partition_entitled_capacity=%d\n", entitled_capacity);
-
-	seq_printf(m, "partition_max_entitled_capacity=%d\n",
-		   max_entitled_capacity);
-
-	if (shared) {
-		pool_id = HvLpConfig_getSharedPoolIndex();
-		seq_printf(m, "pool=%d\n", (int)pool_id);
-		seq_printf(m, "pool_capacity=%d\n",
-			   (int)(HvLpConfig_getNumProcsInSharedPool(pool_id) *
-				 100));
-		seq_printf(m, "purr=%ld\n", purr);
-	}
-
-	seq_printf(m, "shared_processor_mode=%d\n", shared);
-
-	return 0;
-}
-
-#else				/* CONFIG_PPC_ISERIES */
-
-static int iseries_lparcfg_data(struct seq_file *m, void *v)
-{
-	return 0;
-}
-
-#endif				/* CONFIG_PPC_ISERIES */
-
-#ifdef CONFIG_PPC_PSERIES
 /*
  * Methods used to fetch LPAR data when running on a pSeries platform.
  */
@@ -648,8 +581,7 @@ static ssize_t lparcfg_write(struct file *file, const char __user * buf,
 	u8 new_weight, *new_weight_ptr = &new_weight;
 	ssize_t retval;
 
-	if (!firmware_has_feature(FW_FEATURE_SPLPAR) ||
-			firmware_has_feature(FW_FEATURE_ISERIES))
+	if (!firmware_has_feature(FW_FEATURE_SPLPAR))
 		return -EINVAL;
 
 	if (count > kbuf_sz)
@@ -709,21 +641,6 @@ static ssize_t lparcfg_write(struct file *file, const char __user * buf,
 	return retval;
 }
 
-#else				/* CONFIG_PPC_PSERIES */
-
-static int pseries_lparcfg_data(struct seq_file *m, void *v)
-{
-	return 0;
-}
-
-static ssize_t lparcfg_write(struct file *file, const char __user * buf,
-			     size_t count, loff_t * off)
-{
-	return -EINVAL;
-}
-
-#endif				/* CONFIG_PPC_PSERIES */
-
 static int lparcfg_data(struct seq_file *m, void *v)
 {
 	struct device_node *rootdn;
@@ -738,19 +655,11 @@ static int lparcfg_data(struct seq_file *m, void *v)
 	rootdn = of_find_node_by_path("/");
 	if (rootdn) {
 		tmp = of_get_property(rootdn, "model", NULL);
-		if (tmp) {
+		if (tmp)
 			model = tmp;
-			/* Skip "IBM," - see platforms/iseries/dt.c */
-			if (firmware_has_feature(FW_FEATURE_ISERIES))
-				model += 4;
-		}
 		tmp = of_get_property(rootdn, "system-id", NULL);
-		if (tmp) {
+		if (tmp)
 			system_id = tmp;
-			/* Skip "IBM," - see platforms/iseries/dt.c */
-			if (firmware_has_feature(FW_FEATURE_ISERIES))
-				system_id += 4;
-		}
 		lp_index_ptr = of_get_property(rootdn, "ibm,partition-no",
 					NULL);
 		if (lp_index_ptr)
@@ -761,8 +670,6 @@ static int lparcfg_data(struct seq_file *m, void *v)
 	seq_printf(m, "system_type=%s\n", model);
 	seq_printf(m, "partition_id=%d\n", (int)lp_index);
 
-	if (firmware_has_feature(FW_FEATURE_ISERIES))
-		return iseries_lparcfg_data(m, v);
 	return pseries_lparcfg_data(m, v);
 }
 
@@ -786,8 +693,7 @@ static int __init lparcfg_init(void)
 	umode_t mode = S_IRUSR | S_IRGRP | S_IROTH;
 
 	/* Allow writing if we have FW_FEATURE_SPLPAR */
-	if (firmware_has_feature(FW_FEATURE_SPLPAR) &&
-			!firmware_has_feature(FW_FEATURE_ISERIES))
+	if (firmware_has_feature(FW_FEATURE_SPLPAR))
 		mode |= S_IWUSR;
 
 	ent = proc_create("powerpc/lparcfg", mode, NULL, &lparcfg_fops);
diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c
index 41456ff55e1..0bb1f98613b 100644
--- a/arch/powerpc/kernel/paca.c
+++ b/arch/powerpc/kernel/paca.c
@@ -11,13 +11,10 @@
 #include <linux/export.h>
 #include <linux/memblock.h>
 
-#include <asm/firmware.h>
 #include <asm/lppaca.h>
 #include <asm/paca.h>
 #include <asm/sections.h>
 #include <asm/pgtable.h>
-#include <asm/iseries/lpar_map.h>
-#include <asm/iseries/hv_types.h>
 #include <asm/kexec.h>
 
 /* This symbol is provided by the linker - let it fill in the paca
@@ -30,8 +27,8 @@ extern unsigned long __toc_start;
  * The structure which the hypervisor knows about - this structure
  * should not cross a page boundary.  The vpa_init/register_vpa call
  * is now known to fail if the lppaca structure crosses a page
- * boundary.  The lppaca is also used on legacy iSeries and POWER5
- * pSeries boxes.  The lppaca is 640 bytes long, and cannot readily
+ * boundary.  The lppaca is also used on POWER5 pSeries boxes.
+ * The lppaca is 640 bytes long, and cannot readily
  * change since the hypervisor knows its layout, so a 1kB alignment
  * will suffice to ensure that it doesn't cross a page boundary.
  */
@@ -183,12 +180,9 @@ void __init allocate_pacas(void)
 	/*
 	 * We can't take SLB misses on the paca, and we want to access them
 	 * in real mode, so allocate them within the RMA and also within
-	 * the first segment. On iSeries they must be within the area mapped
-	 * by the HV, which is HvPagesToMap * HVPAGESIZE bytes.
+	 * the first segment.
 	 */
 	limit = min(0x10000000ULL, ppc64_rma_size);
-	if (firmware_has_feature(FW_FEATURE_ISERIES))
-		limit = min(limit, HvPagesToMap * HVPAGESIZE);
 
 	paca_size = PAGE_ALIGN(sizeof(struct paca_struct) * nr_cpu_ids);
 
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index cce98d76e90..d0373bcb7c9 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -38,7 +38,6 @@
 #include <asm/byteorder.h>
 #include <asm/machdep.h>
 #include <asm/ppc-pci.h>
-#include <asm/firmware.h>
 #include <asm/eeh.h>
 
 static DEFINE_SPINLOCK(hose_spinlock);
@@ -219,20 +218,6 @@ static int pci_read_irq_line(struct pci_dev *pci_dev)
 	struct of_irq oirq;
 	unsigned int virq;
 
-	/* The current device-tree that iSeries generates from the HV
-	 * PCI informations doesn't contain proper interrupt routing,
-	 * and all the fallback would do is print out crap, so we
-	 * don't attempt to resolve the interrupts here at all, some
-	 * iSeries specific fixup does it.
-	 *
-	 * In the long run, we will hopefully fix the generated device-tree
-	 * instead.
-	 */
-#ifdef CONFIG_PPC_ISERIES
-	if (firmware_has_feature(FW_FEATURE_ISERIES))
-		return -1;
-#endif
-
 	pr_debug("PCI: Try to map irq for %s...\n", pci_name(pci_dev));
 
 #ifdef DEBUG
diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c
index 883e74c0d1b..0c683d376b1 100644
--- a/arch/powerpc/kernel/sysfs.c
+++ b/arch/powerpc/kernel/sysfs.c
@@ -12,7 +12,6 @@
 #include <asm/current.h>
 #include <asm/processor.h>
 #include <asm/cputable.h>
-#include <asm/firmware.h>
 #include <asm/hvcall.h>
 #include <asm/prom.h>
 #include <asm/machdep.h>
@@ -341,8 +340,7 @@ static void __cpuinit register_cpu_online(unsigned int cpu)
 	int i, nattrs;
 
 #ifdef CONFIG_PPC64
-	if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
-			cpu_has_feature(CPU_FTR_SMT))
+	if (cpu_has_feature(CPU_FTR_SMT))
 		device_create_file(s, &dev_attr_smt_snooze_delay);
 #endif
 
@@ -414,8 +412,7 @@ static void unregister_cpu_online(unsigned int cpu)
 	BUG_ON(!c->hotpluggable);
 
 #ifdef CONFIG_PPC64
-	if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
-			cpu_has_feature(CPU_FTR_SMT))
+	if (cpu_has_feature(CPU_FTR_SMT))
 		device_remove_file(s, &dev_attr_smt_snooze_delay);
 #endif
 
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index f81c81b92f0..2c42cd72d0f 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -17,8 +17,7 @@
  *
  * TODO (not necessarily in this file):
  * - improve precision and reproducibility of timebase frequency
- * measurement at boot time. (for iSeries, we calibrate the timebase
- * against the Titan chip's clock.)
+ * measurement at boot time.
  * - for astronomical applications: add a new function to get
  * non ambiguous timestamps even around leap seconds. This needs
  * a new timestamp format and a good name.
@@ -70,10 +69,6 @@
 #include <asm/vdso_datapage.h>
 #include <asm/firmware.h>
 #include <asm/cputime.h>
-#ifdef CONFIG_PPC_ISERIES
-#include <asm/iseries/it_lp_queue.h>
-#include <asm/iseries/hv_call_xm.h>
-#endif
 
 /* powerpc clocksource/clockevent code */
 
@@ -117,14 +112,6 @@ static struct clock_event_device decrementer_clockevent = {
 DEFINE_PER_CPU(u64, decrementers_next_tb);
 static DEFINE_PER_CPU(struct clock_event_device, decrementers);
 
-#ifdef CONFIG_PPC_ISERIES
-static unsigned long __initdata iSeries_recal_titan;
-static signed long __initdata iSeries_recal_tb;
-
-/* Forward declaration is only needed for iSereis compiles */
-static void __init clocksource_init(void);
-#endif
-
 #define XSEC_PER_SEC (1024*1024)
 
 #ifdef CONFIG_PPC64
@@ -423,74 +410,6 @@ unsigned long profile_pc(struct pt_regs *regs)
 EXPORT_SYMBOL(profile_pc);
 #endif
 
-#ifdef CONFIG_PPC_ISERIES
-
-/* 
- * This function recalibrates the timebase based on the 49-bit time-of-day
- * value in the Titan chip.  The Titan is much more accurate than the value
- * returned by the service processor for the timebase frequency.
- */
-
-static int __init iSeries_tb_recal(void)
-{
-	unsigned long titan, tb;
-
-	/* Make sure we only run on iSeries */
-	if (!firmware_has_feature(FW_FEATURE_ISERIES))
-		return -ENODEV;
-
-	tb = get_tb();
-	titan = HvCallXm_loadTod();
-	if ( iSeries_recal_titan ) {
-		unsigned long tb_ticks = tb - iSeries_recal_tb;
-		unsigned long titan_usec = (titan - iSeries_recal_titan) >> 12;
-		unsigned long new_tb_ticks_per_sec   = (tb_ticks * USEC_PER_SEC)/titan_usec;
-		unsigned long new_tb_ticks_per_jiffy =
-			DIV_ROUND_CLOSEST(new_tb_ticks_per_sec, HZ);
-		long tick_diff = new_tb_ticks_per_jiffy - tb_ticks_per_jiffy;
-		char sign = '+';		
-		/* make sure tb_ticks_per_sec and tb_ticks_per_jiffy are consistent */
-		new_tb_ticks_per_sec = new_tb_ticks_per_jiffy * HZ;
-
-		if ( tick_diff < 0 ) {
-			tick_diff = -tick_diff;
-			sign = '-';
-		}
-		if ( tick_diff ) {
-			if ( tick_diff < tb_ticks_per_jiffy/25 ) {
-				printk( "Titan recalibrate: new tb_ticks_per_jiffy = %lu (%c%ld)\n",
-						new_tb_ticks_per_jiffy, sign, tick_diff );
-				tb_ticks_per_jiffy = new_tb_ticks_per_jiffy;
-				tb_ticks_per_sec   = new_tb_ticks_per_sec;
-				calc_cputime_factors();
-				vdso_data->tb_ticks_per_sec = tb_ticks_per_sec;
-				setup_cputime_one_jiffy();
-			}
-			else {
-				printk( "Titan recalibrate: FAILED (difference > 4 percent)\n"
-					"                   new tb_ticks_per_jiffy = %lu\n"
-					"                   old tb_ticks_per_jiffy = %lu\n",
-					new_tb_ticks_per_jiffy, tb_ticks_per_jiffy );
-			}
-		}
-	}
-	iSeries_recal_titan = titan;
-	iSeries_recal_tb = tb;
-
-	/* Called here as now we know accurate values for the timebase */
-	clocksource_init();
-	return 0;
-}
-late_initcall(iSeries_tb_recal);
-
-/* Called from platform early init */
-void __init iSeries_time_init_early(void)
-{
-	iSeries_recal_tb = get_tb();
-	iSeries_recal_titan = HvCallXm_loadTod();
-}
-#endif /* CONFIG_PPC_ISERIES */
-
 #ifdef CONFIG_IRQ_WORK
 
 /*
@@ -547,16 +466,6 @@ void arch_irq_work_raise(void)
 #endif /* CONFIG_IRQ_WORK */
 
 /*
- * For iSeries shared processors, we have to let the hypervisor
- * set the hardware decrementer.  We set a virtual decrementer
- * in the lppaca and call the hypervisor if the virtual
- * decrementer is less than the current value in the hardware
- * decrementer. (almost always the new decrementer value will
- * be greater than the current hardware decementer so the hypervisor
- * call will not be needed)
- */
-
-/*
  * timer_interrupt - gets called when the decrementer overflows,
  * with interrupts disabled.
  */
@@ -599,20 +508,10 @@ void timer_interrupt(struct pt_regs * regs)
 		irq_work_run();
 	}
 
-#ifdef CONFIG_PPC_ISERIES
-	if (firmware_has_feature(FW_FEATURE_ISERIES))
-		get_lppaca()->int_dword.fields.decr_int = 0;
-#endif
-
 	*next_tb = ~(u64)0;
 	if (evt->event_handler)
 		evt->event_handler(evt);
 
-#ifdef CONFIG_PPC_ISERIES
-	if (firmware_has_feature(FW_FEATURE_ISERIES) && hvlpevent_is_pending())
-		process_hvlpevents();
-#endif
-
 #ifdef CONFIG_PPC64
 	/* collect purr register values often, for accurate calculations */
 	if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
@@ -984,9 +883,8 @@ void __init time_init(void)
 	 */
 	start_cpu_decrementer();
 
-	/* Register the clocksource, if we're not running on iSeries */
-	if (!firmware_has_feature(FW_FEATURE_ISERIES))
-		clocksource_init();
+	/* Register the clocksource */
+	clocksource_init();
 
 	init_decrementer_clockevent();
 }