Voyager subarchitecture for 2.5.47

diff -Nru a/arch/i386/boot/compressed/misc.c b/arch/i386/boot/compressed/misc.c
@@ -299,7 +299,7 @@
 struct {
 	long * a;
 	short b;
-	} stack_start = { & user_stack [STACK_SIZE] , __KERNEL_DS };
+	} stack_start = { & user_stack [STACK_SIZE] , __BOOT_DS };
 
 static void setup_normal_output_buffer(void)
 {

diff -Nru a/arch/i386/kernel/cpu/common.c b/arch/i386/kernel/cpu/common.c
@@ -42,25 +42,6 @@
 }
 __setup("cachesize=", cachesize_setup);
 
-#ifndef CONFIG_X86_TSC
-static int tsc_disable __initdata = 0;
-
-static int __init tsc_setup(char *str)
-{
-	tsc_disable = 1;
-	return 1;
-}
-#else
-#define tsc_disable 0
-
-static int __init tsc_setup(char *str)
-{
-	printk("notsc: Kernel compiled with CONFIG_X86_TSC, cannot disable TSC.\n");
-	return 1;
-}
-#endif
-__setup("notsc", tsc_setup);
-
 int __init get_model_name(struct cpuinfo_x86 *c)
 {
 	unsigned int *v;

diff -Nru a/arch/i386/kernel/irq.c b/arch/i386/kernel/irq.c
@@ -167,7 +167,7 @@
 		if (cpu_online(j))
 			p += seq_printf(p, "%10u ", nmi_count(j));
 	seq_putc(p, '\n');
-#if CONFIG_X86_LOCAL_APIC
+#ifdef CONFIG_X86_LOCAL_APIC
 	seq_printf(p, "LOC: ");
 	for (j = 0; j < NR_CPUS; j++)
 		if (cpu_online(j))

diff -Nru a/arch/i386/kernel/timers/timer.c b/arch/i386/kernel/timers/timer.c
@@ -8,9 +8,7 @@
 /* list of timers, ordered by preference, NULL terminated */
 static struct timer_opts* timers[] = {
 	&timer_tsc,
-#ifndef CONFIG_X86_TSC
 	&timer_pit,
-#endif
 	NULL,
 };
 

diff -Nru a/arch/i386/kernel/timers/timer_pit.c b/arch/i386/kernel/timers/timer_pit.c
@@ -9,7 +9,9 @@
 #include <linux/irq.h>
 #include <asm/mpspec.h>
 #include <asm/timer.h>
+#include <asm/smp.h>
 #include <asm/io.h>
+#include <asm/arch_hooks.h>
 
 extern spinlock_t i8259A_lock;
 extern spinlock_t i8253_lock;

diff -Nru a/arch/i386/kernel/timers/timer_tsc.c b/arch/i386/kernel/timers/timer_tsc.c
@@ -11,6 +11,10 @@
 
 #include <asm/timer.h>
 #include <asm/io.h>
+/* processor.h for distable_tsc flag */
+#include <asm/processor.h>
+
+int tsc_disable __initdata = 0;
 
 extern int x86_udelay_tsc;
 extern spinlock_t i8253_lock;

@@ -286,6 +290,18 @@
 	}
 	return -ENODEV;
 }
+
+/* disable flag for tsc.  Takes effect by clearing the TSC cpu flag
+ * in cpu/common.c */
+static int __init tsc_setup(char *str)
+{
+	tsc_disable = 1;
+	return 1;
+}
+
+__setup("notsc", tsc_setup);
+
+
 
 /************************************************************/
 

diff -Nru a/arch/i386/mach-voyager/setup.c b/arch/i386/mach-voyager/setup.c
@@ -29,6 +29,9 @@
 
 void __init pre_setup_arch_hook(void)
 {
+	/* Voyagers run their CPUs from independent clocks, so disable
+	 * the TSC code because we can't sync them */
+	tsc_disable = 1;
 }
 
 void __init trap_init_hook(void)

diff -Nru a/arch/i386/mach-voyager/voyager_basic.c b/arch/i386/mach-voyager/voyager_basic.c
@@ -21,6 +21,7 @@
 #include <linux/init.h>
 #include <linux/delay.h>
 #include <linux/reboot.h>
+#include <linux/sysrq.h>
 #include <asm/io.h>
 #include <asm/pgalloc.h>
 #include <asm/voyager.h>

@@ -41,6 +42,21 @@
 
 struct voyager_SUS *voyager_SUS = NULL;
 
+#ifdef CONFIG_SMP
+static void
+voyager_dump(int dummy1, struct pt_regs *dummy2, struct tty_struct *dummy3)
+{
+	/* get here via a sysrq */
+	voyager_smp_dump();
+}
+
+static struct sysrq_key_op sysrq_voyager_dump_op = {
+	.handler	= voyager_dump,
+	.help_msg	= "voyager",
+	.action_msg	= "Dump Voyager Status\n",
+};
+#endif
+
 void
 voyager_detect(struct voyager_bios_info *bios)
 {

@@ -62,6 +78,9 @@
 			printk("\n**WARNING**: Voyager HAL only supports Levels 4 and 5 Architectures at the moment\n\n");
 		/* install the power off handler */
 		pm_power_off = voyager_power_off;
+#ifdef CONFIG_SMP
+		register_sysrq_key('c', &sysrq_voyager_dump_op);
+#endif
 	} else {
 		printk("\n\n**WARNING**: No Voyager Subsystem Found\n");
 	}

@@ -141,15 +160,6 @@
 	pg0[0] = old;
 	local_flush_tlb();
 	return retval;
-}
-
-void
-voyager_dump()
-{
-	/* get here via a sysrq */
-#ifdef CONFIG_SMP
-	voyager_smp_dump();
-#endif
 }
 
 /* voyager specific handling code for timer interrupts.  Used to hand

112 lines not on this page · raw message

diff -Nru a/drivers/char/sysrq.c b/drivers/char/sysrq.c
@@ -35,10 +35,6 @@
 
 #include <asm/ptrace.h>
 
-#ifdef CONFIG_VOYAGER
-#include <asm/voyager.h>
-#endif
-
 extern void reset_vc(unsigned int);
 extern struct list_head super_blocks;
 

@@ -323,14 +319,6 @@
 	.action_msg	= "Terminate All Tasks",
 };
 
-#ifdef CONFIG_VOYAGER
-static struct sysrq_key_op sysrq_voyager_dump_op = {
-	.handler	= voyager_dump,
-	.help_msg	= "voyager",
-	.action_msg	= "Dump Voyager Status\n",
-};
-#endif
-
 static void sysrq_handle_kill(int key, struct pt_regs *pt_regs,
 			      struct tty_struct *tty) 
 {

@@ -364,11 +352,7 @@
 		 it is handled specially on the sparc
 		 and will never arrive */
 /* b */	&sysrq_reboot_op,
-#ifdef CONFIG_VOYAGER
-/* c */ &sysrq_voyager_dump_op,
-#else
-/* c */	NULL,
-#endif
+/* c */ NULL, /* May be assigned at init time by SMP VOYAGER */
 /* d */	NULL,
 /* e */	&sysrq_term_op,
 /* f */	NULL,

diff -Nru a/include/asm-i386/desc.h b/include/asm-i386/desc.h
@@ -13,6 +13,7 @@
 struct Xgt_desc_struct {
 	unsigned short size;
 	unsigned long address __attribute__((packed));
+	unsigned short pad;
 } __attribute__ ((packed));
 
 extern struct Xgt_desc_struct idt_descr, cpu_gdt_descr[NR_CPUS];

diff -Nru a/include/asm-i386/hw_irq.h b/include/asm-i386/hw_irq.h
@@ -131,7 +131,7 @@
 
 #endif /* CONFIG_PROFILING */
  
-#ifdef CONFIG_SMP /*more of this file should probably be ifdefed SMP */
+#if defined(CONFIG_SMP) && !defined(CONFIG_VOYAGER) /*more of this file should probably be ifdefed SMP */
 static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i) {
 	if (IO_APIC_IRQ(i))
 		send_IPI_self(IO_APIC_VECTOR(i));

diff -Nru a/include/asm-i386/processor.h b/include/asm-i386/processor.h
@@ -18,6 +18,9 @@
 #include <linux/config.h>
 #include <linux/threads.h>
 
+/* flag for disabling the tsc */
+extern int tsc_disable;
+
 struct desc_struct {
 	unsigned long a,b;
 };

diff -Nru a/include/asm-i386/segment.h b/include/asm-i386/segment.h
@@ -69,6 +69,14 @@
 
 #define GDT_SIZE (GDT_ENTRIES * 8)
 
+/* Simple and small GDT entries for booting only */
+
+#define GDT_ENTRY_BOOT_CS		2
+#define __BOOT_CS	(GDT_ENTRY_BOOT_CS * 8)
+
+#define GDT_ENTRY_BOOT_DS		(GDT_ENTRY_BOOT_CS + 1)
+#define __BOOT_DS	(GDT_ENTRY_BOOT_DS * 8)
+
 /*
  * The interrupt descriptor table has room for 256 idt's,
  * the global descriptor table is dependent on the number

diff -Nru a/include/asm-i386/smp.h b/include/asm-i386/smp.h
@@ -6,6 +6,7 @@
  */
 #ifndef __ASSEMBLY__
 #include <linux/config.h>
+#include <linux/kernel.h>
 #include <linux/threads.h>
 #endif
 

@@ -83,11 +84,22 @@
 #define cpu_possible(cpu) (cpu_callout_map & (1<<(cpu)))
 #define cpu_online(cpu) (cpu_online_map & (1<<(cpu)))
 
+#define for_each_cpu(cpu, mask) \
+	for(mask = cpu_online_map; \
+	    cpu = __ffs(mask), mask != 0; \
+	    mask &= ~(1<<cpu))
+
 extern inline unsigned int num_online_cpus(void)
 {
 	return hweight32(cpu_online_map);
 }
 
+/* We don't mark CPUs online until __cpu_up(), so we need another measure */
+static inline int num_booting_cpus(void)
+{
+	return hweight32(cpu_callout_map);
+}
+
 extern inline int any_online_cpu(unsigned int mask)
 {
 	if (mask & cpu_online_map)

@@ -95,7 +107,7 @@
 
 	return -1;
 }
-
+#ifdef CONFIG_X86_LOCAL_APIC
 static __inline int hard_smp_processor_id(void)
 {
 	/* we don't want to mark this access volatile - bad code generation */

@@ -108,12 +120,7 @@
 	return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
 }
 
-/* We don't mark CPUs online until __cpu_up(), so we need another measure */
-static inline int num_booting_cpus(void)
-{
-	return hweight32(cpu_callout_map);
-}
-
+#endif
 #endif /* !__ASSEMBLY__ */
 
 #define NO_PROC_ID		0xFF		/* No processor magic marker */

diff -Nru a/include/asm-i386/voyager.h b/include/asm-i386/voyager.h
@@ -504,7 +504,6 @@
 extern int voyager_memory_detect(int region, __u32 *addr, __u32 *length);
 extern void voyager_smp_intr_init(void);
 extern __u8 voyager_extended_cmos_read(__u16 cmos_address);
-extern void voyager_dump(void);
 extern void voyager_smp_dump(void);
 extern void voyager_timer_interrupt(struct pt_regs *regs);
 extern void smp_local_timer_interrupt(struct pt_regs * regs);