sw64: always use cpu_data and simplify it

Sunway inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I56OLG

--------------------------------

Make use of cpu_data no matter SMP is yes or no, and remove unused
fields from it. After that, some function calls can be simplified.
Signed-off-by: NHe Sheng <hesheng@wxiat.com>
Signed-off-by: NGu Zitao <guzitao@wxiat.com>

arch/sw_64/include/asm/hw_init.h

@@ -23,11 +23,6 @@ struct cpuinfo_sw64 {
 	int need_new_asn;
 	int asn_lock;
 	unsigned long ipi_count;
-	unsigned long prof_multiplier;
-	unsigned long prof_counter;
-	unsigned char mcheck_expected;
-	unsigned char mcheck_taken;
-	unsigned char mcheck_extra;
 	struct cache_desc icache; /* Primary I-cache */
 	struct cache_desc dcache; /* Primary D or combined I/D cache */
 	struct cache_desc scache; /* Secondary cache */
@@ -73,6 +68,8 @@ struct memmap_entry {
 };
 
 extern struct cpuinfo_sw64 cpu_data[NR_CPUS];
+extern void store_cpu_data(int cpu);
+
 extern struct cpu_desc_t cpu_desc;
 extern struct socket_desc_t socket_desc[MAX_NUMSOCKETS];
 extern int memmap_nr;

arch/sw_64/include/asm/mmu_context.h

@@ -60,12 +60,7 @@ __reload_thread(struct pcb_struct *pcb)
  */
 
 #include <asm/hw_init.h>
-#ifdef CONFIG_SMP
 #define cpu_last_asn(cpuid)	(cpu_data[cpuid].last_asn)
-#else
-extern unsigned long last_asn;
-#define cpu_last_asn(cpuid)	last_asn
-#endif /* CONFIG_SMP */
 
 #define ASN_FIRST_VERSION	(1UL << WIDTH_HARDWARE_ASN)
 #define HARDWARE_ASN_MASK	((1UL << WIDTH_HARDWARE_ASN) - 1)

arch/sw_64/kernel/setup.c

@@ -28,9 +28,10 @@
 #include <linux/genalloc.h>
 #include <linux/acpi.h>
 
-#include <asm/sw64_init.h>
 #include <asm/efi.h>
 #include <asm/kvm_cma.h>
+#include <asm/mmu_context.h>
+#include <asm/sw64_init.h>
 
 #include "proto.h"
 #include "pci_impl.h"
@@ -137,6 +138,17 @@ struct screen_info screen_info = {
 };
 EXPORT_SYMBOL(screen_info);
 
+/*
+ * Move global data into per-processor storage.
+ */
+void store_cpu_data(int cpu)
+{
+	cpu_data[cpu].loops_per_jiffy = loops_per_jiffy;
+	cpu_data[cpu].last_asn = ASN_FIRST_VERSION;
+	cpu_data[cpu].need_new_asn = 0;
+	cpu_data[cpu].asn_lock = 0;
+}
+
 #ifdef CONFIG_KEXEC
 
 void *kexec_control_page;
@@ -859,13 +871,12 @@ setup_arch(char **cmdline_p)
 	/* Default root filesystem to sda2.  */
 	ROOT_DEV = Root_SDA2;
 
-	/*
-	 * Identify the flock of penguins.
-	 */
-
 #ifdef CONFIG_SMP
 	setup_smp();
+#else
+	store_cpu_data(0);
 #endif
+
 #ifdef CONFIG_NUMA
 	cpu_set_node();
 #endif

arch/sw_64/kernel/smp.c

@@ -59,29 +59,6 @@ EXPORT_SYMBOL(smp_num_cpus);
 #define send_sleep_interrupt(cpu)	send_ipi((cpu), II_SLEEP)
 #define send_wakeup_interrupt(cpu)	send_ipi((cpu), II_WAKE)
 
-/*
- * Called by both boot and secondaries to move global data into
- *  per-processor storage.
- */
-static inline void __init
-smp_store_cpu_info(int cpuid)
-{
-	cpu_data[cpuid].loops_per_jiffy = loops_per_jiffy;
-	cpu_data[cpuid].last_asn = ASN_FIRST_VERSION;
-	cpu_data[cpuid].need_new_asn = 0;
-	cpu_data[cpuid].asn_lock = 0;
-}
-
-/*
- * Ideally sets up per-cpu profiling hooks.  Doesn't do much now...
- */
-static inline void __init
-smp_setup_percpu_timer(int cpuid)
-{
-	setup_timer();
-	cpu_data[cpuid].prof_counter = 1;
-	cpu_data[cpuid].prof_multiplier = 1;
-}
 
 static void __init wait_boot_cpu_to_stop(int cpuid)
 {
@@ -128,7 +105,7 @@ void smp_callin(void)
 	wrent(entInt, 0);
 
 	/* Get our local ticker going. */
-	smp_setup_percpu_timer(cpuid);
+	setup_timer();
 
 	/* All kernel threads share the same mm context.  */
 	mmgrab(&init_mm);
@@ -298,7 +275,7 @@ void __init setup_smp(void)
 			__cpu_to_rcid[num] = i;
 			__rcid_to_cpu[i] = num;
 			set_cpu_possible(num, true);
-			smp_store_cpu_info(num);
+			store_cpu_data(num);
 			if (!cpumask_test_cpu(i, &cpu_offline))
 				set_cpu_present(num, true);
 			num++;

arch/sw_64/kernel/time.c

@@ -96,10 +96,6 @@ void setup_clocksource(void)
 }
 #endif /* !CONFIG_SMP */
 
-void __init common_init_rtc(void)
-{
-	setup_timer();
-}
 
 void __init
 time_init(void)
@@ -114,7 +110,7 @@ time_init(void)
 	setup_clocksource();
 	of_clk_init(NULL);
 	/* Startup the timer source. */
-	common_init_rtc();
+	setup_timer();
 }
 
 void calibrate_delay(void)

arch/sw_64/mm/fault.c

@@ -64,13 +64,7 @@ void show_all_vma(void)
 /*
  * Force a new ASN for a task.
  */
-
-#ifndef CONFIG_SMP
-unsigned long last_asn = ASN_FIRST_VERSION;
-#endif
-
-void
-__load_new_mm_context(struct mm_struct *next_mm)
+void __load_new_mm_context(struct mm_struct *next_mm)
 {
 	unsigned long mmc;
 	struct pcb_struct *pcb;
@@ -85,7 +79,6 @@ __load_new_mm_context(struct mm_struct *next_mm)
 	__reload_thread(pcb);
 }
 
-
 /*
  * This routine handles page faults.  It determines the address,
  * and the problem, and then passes it off to handle_mm_fault().