linux-2.4.20-pre4_cyclone-timer_B0

PATCH New john stultz 1 participant 1 message Aug 22, 2002 Documentation

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john stultz

author

2002-08-22 22:53 UTC #0 lore raw

PATCH 1/1 linux-2.4.20-pre4_cyclone-timer_B0

All,
Here is my re-synced cyclone-timer patch against 2.4.20-pre4 for use
with x440 systems. You'll want to grab James Cleverdon's summit patch before trying this one.

Quoted 1 line

From the patch:

"This options allows you to pass "cyclone" as a boot option to make use of a performance counter on the Cyclone chipset for calculating do_gettimeofday, greatly improving performance when compared to the PIT based method."

All feedback and comments are welcome.

thanks
-john

Documentation/Configure.help +8 -0

diff -Nru a/Documentation/Configure.help b/Documentation/Configure.help
@@ -252,6 +252,14 @@
   You will need a new lynxer.elf file to flash your firmware with - send
   email to [email protected]
 
+IBM x440 Summit support
+CONFIG_X86_SUMMIT_NUMA
+  This option enables support for the IBM x440 and related multi-CEC 
+  systems based on the Summit chipset. This options allows you to pass
+  "cyclone" as a boot option to make use of a performance counter on 
+  the Cyclone chipset for calculating do_gettimeofday, greatly 
+  improving performance when compared to the PIT based method. 
+
 IO-APIC support on uniprocessors
 CONFIG_X86_UP_IOAPIC
   An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an

arch/i386/config.in +10 -4

diff -Nru a/arch/i386/config.in b/arch/i386/config.in
@@ -216,12 +216,18 @@
       define_bool CONFIG_X86_IO_APIC y
    fi
 else
-   bool 'Multiquad NUMA system' CONFIG_MULTIQUAD
+   bool 'Multi-node NUMA system support' CONFIG_X86_NUMA
+   if [ "$CONFIG_X86_NUMA" = "y" ]; then
+      bool '  Multiquad (IBM/Sequent) NUMAQ support' CONFIG_MULTIQUAD
+      bool '  IBM x440 Summit support' CONFIG_X86_SUMMIT_NUMA
+   fi
 fi
 
-bool 'Unsynced TSC support' CONFIG_X86_TSC_DISABLE
-if [ "$CONFIG_X86_TSC_DISABLE" != "y" -a "$CONFIG_X86_HAS_TSC" = "y" ]; then
-   define_bool CONFIG_X86_TSC y
+if [ "$CONFIG_X86_NUMA" != "y" ]; then
+   bool 'Unsynced TSC support' CONFIG_X86_TSC_DISABLE
+   if [ "$CONFIG_X86_TSC_DISABLE" != "y" -a "$CONFIG_X86_HAS_TSC" = "y" ]; then
+      define_bool CONFIG_X86_TSC y
+   fi
 fi
 
 if [ "$CONFIG_SMP" = "y" -a "$CONFIG_X86_CMPXCHG" = "y" ]; then

arch/i386/kernel/setup.c +1 -1

diff -Nru a/arch/i386/kernel/setup.c b/arch/i386/kernel/setup.c
@@ -1174,7 +1174,7 @@
 
 
 #ifndef CONFIG_X86_TSC
-static int tsc_disable __initdata = 0;
+int tsc_disable __initdata = 0;
 
 static int __init notsc_setup(char *str)
 {

arch/i386/kernel/time.c +143 -4

171 lines not on this page · raw message

include/asm-i386/fixmap.h +3 -0

diff -Nru a/include/asm-i386/fixmap.h b/include/asm-i386/fixmap.h
@@ -64,6 +64,9 @@
 #ifndef CONFIG_X86_F00F_WORKS_OK
 	FIX_F00F,
 #endif
+#ifdef CONFIG_X86_SUMMIT_NUMA
+	FIX_CYCLONE_TIMER, /*cyclone timer register*/
+#endif 
 #ifdef CONFIG_HIGHMEM
 	FIX_KMAP_BEGIN,	/* reserved pte's for temporary kernel mappings */
 	FIX_KMAP_END = FIX_KMAP_BEGIN+(KM_TYPE_NR*NR_CPUS)-1,