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SubjectRe: [PATCH] Summit support for 2.5 [0/4]
> On Sun, 13 Oct 2002, Martin J. Bligh wrote:
>> 1. Time
>> 2. It'd make the patches much bigger and harder to read.
>
> Hmm.. I'd actually rather have the code split up in the proper location,
> even if it would mean that summit support wouldn't work (or even
> necessarily compile) by the feature-freeze.

OK. Having looked at this, it actuallly looks easy enough, and
cleaner if I can just stick to the Summit stuff for now. The
patches will actually be smaller, and the only disadvantage seems
to be that I'll end up with less hair ;-)

Below is a brief proof-of-concept I did, please cluebat me now if
this isn't the type of thing you want before I burn hours and blood
pressure fixing up the rest of it.

Consider me "re-aligned" ;-)

M.

PS. This distros want Summit to autodetect for their install kernels,
which is what the x86_summit switch is for.

------------
diff -urpN -X /home/fletch/.diff.exclude virgin/arch/i386/Config.help subarch-1/arch/i386/Config.help
--- virgin/arch/i386/Config.help Fri Oct 11 21:21:31 2002
+++ subarch-1/arch/i386/Config.help Sun Oct 13 18:40:30 2002
@@ -73,6 +73,12 @@ CONFIG_X86_CYCLONE
If you are suffering from time skew using a multi-CEC system, say YES.
Otherwise it is safe to say NO.

+CONFIG_X86_SUMMIT
+ This option is needed for IBM systems that use the Summit/EXA chipset.
+ In particular, it is needed for the x440.
+
+ If you don't have one of these computers, you should say N here.
+
CONFIG_X86_UP_IOAPIC
An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an
SMP-capable replacement for PC-style interrupt controllers. Most
diff -urpN -X
/home/fletch/.diff.exclude virgin/arch/i386/Makefile subarch-1/arch/i386/Makefile
--- virgin/arch/i386/Makefile Fri Oct 11 21:21:39 2002
+++ subarch-1/arch/i386/Makefile Sun Oct 13 17:54:32 2002
@@ -46,7 +46,11 @@ CFLAGS += $(cflags-y)
ifdef CONFIG_VISWS
MACHINE := mach-visws
else
-MACHINE := mach-generic
+ ifdef CONFIG_X86_SUMMIT
+ MACHINE := mach-summit
+ else
+ MACHINE := mach-generic
+ endif
endif

HEAD := arch/i386/kernel/head.o arch/i386/kernel/init_task.o
diff -urpN -X /home/fletch/.diff.exclude virgin/arch/i386/config.in subarch-1/arch/i386/config.in
--- virgin/arch/i386/config.in Fri Oct 11 21:21:38 2002
+++ subarch-1/arch/i386/config.in Sun Oct 13 18:40:30 2002
@@ -172,7 +172,8 @@ else
if [ "$CONFIG_X86_NUMA" = "y" ]; then

#Platform Choices
bool 'Multiquad (IBM/Sequent) NUMAQ support' CONFIG_X86_NUMAQ
- if [ "$CONFIG_X86_NUMAQ" = "y" ]; then
+ bool 'IBM x440 (Summit/EXA) support' CONFIG_X86_SUMMIT
+ if [ "$CONFIG_X86_NUMAQ" = "y" -o "$CONFIG_X86_SUMMIT" = "y" ]; then
define_bool CONFIG_CLUSTERED_APIC y
fi
# Common NUMA Features
diff -urpN -X /home/fletch/.diff.exclude virgin/arch/i386/kernel/apic.c subarch-1/arch/i386/kernel/apic.c
--- virgin/arch/i386/kernel/apic.c Fri Oct 11 21:22:46 2002
+++ subarch-1/arch/i386/kernel/apic.c Sun Oct 13 18:34:45 2002
@@ -31,6 +31,7 @@
#include <asm/pgalloc.h>
#include <asm/desc.h>
#include <asm/arch_hooks.h>
+#include "mach_apic.h"

void __init apic_intr_init(void)
{
@@ -328,15 +329,13 @@
void __init setup_local_APIC (void)
* Put the APIC into flat delivery mode.
* Must be "all ones" explicitly for 82489DX.
*/
- apic_write_around(APIC_DFR, 0xffffffff);
+ apic_write_around(APIC_DFR, APIC_DFR_VALUE);

/*
* Set up the logical destination ID.
*/
value = apic_read(APIC_LDR);
- value &= ~APIC_LDR_MASK;
- value |= (1<<(smp_processor_id()+24));
- apic_write_around(APIC_LDR, value);
+ apic_write_around(APIC_LDR, calculate_ldr(value));
}

/*
diff -urpN -X /home/fletch/.diff.exclude virgin/arch/i386/kernel/io_apic.c subarch-1/arch/i386/kernel/io_apic.c
--- virgin/arch/i386/kernel/io_apic.c Fri Oct 11 21:21:38 2002
+++ subarch-1/arch/i386/kernel/io_apic.c Sun Oct 13 18:33:53 2002
@@ -35,6 +35,7 @@
#include
<asm/io.h>
#include <asm/smp.h>
#include <asm/desc.h>
+#include "mach_apic.h"

#undef APIC_LOCKUP_DEBUG

diff -urpN -X /home/fletch/.diff.exclude virgin/arch/i386/mach-generic/mach_apic.h subarch-1/arch/i386/mach-generic/mach_apic.h
--- virgin/arch/i386/mach-generic/mach_apic.h Wed Dec 31 16:00:00 1969
+++ subarch-1/arch/i386/mach-generic/mach_apic.h Sun Oct 13 18:29:40 2002
@@ -0,0 +1,20 @@
+#ifndef __ASM_MACH_APICDEF_H
+#define __ASM_MACH_APICDEF_H
+
+static inline unsigned long calculate_ldr(unsigned long old)
+{
+ unsigned long id;
+
+ id = 1UL << smp_processor_id();
+ return ((old & ~APIC_LDR_MASK) | SET_APIC_LOGICAL_ID(id));
+}
+
+#define APIC_DFR_VALUE (APIC_DFR_FLAT)
+
+#ifdef CONFIG_SMP
+ #define TARGET_CPUS (clustered_apic_mode ? 0xf
: cpu_online_map)
+#else
+ #define TARGET_CPUS 0x01
+#endif
+
+#endif /* __ASM_MACH_APICDEF_H */
diff -urpN -X /home/fletch/.diff.exclude virgin/arch/i386/mach-summit/mach_apic.h subarch-1/arch/i386/mach-summit/mach_apic.h
--- virgin/arch/i386/mach-summit/mach_apic.h Wed Dec 31 16:00:00 1969
+++ subarch-1/arch/i386/mach-summit/mach_apic.h Sun Oct 13 18:14:32 2002
@@ -0,0 +1,20 @@
+#ifndef __ASM_MACH_APICDEF_H
+#define __ASM_MACH_APICDEF_H
+
+extern int x86_summit;
+
+static inline unsigned long calculate_ldr(unsigned long old)
+{
+ unsigned long id;
+
+ if (x86_summit)
+ id = xapic_phys_to_log_apicid(hard_smp_processor_id());
+ else
+ id = 1UL << smp_processor_id();
+ return ((old & ~APIC_LDR_MASK) | SET_APIC_LOGICAL_ID(id));
+}
+
+#define
APIC_DFR_VALUE (x86_summit ? APIC_DFR_CLUSTER : APIC_DFR_FLAT)
+#define TARGET_CPUS (x86_summit ? XAPIC_DEST_CPUS_MASK : cpu_online_map)
+
+#endif /* __ASM_MACH_APICDEF_H */
diff -urpN -X /home/fletch/.diff.exclude virgin/include/asm-i386/apicdef.h subarch-1/include/asm-i386/apicdef.h
--- virgin/include/asm-i386/apicdef.h Fri Oct 11 21:22:09 2002
+++ subarch-1/include/asm-i386/apicdef.h Sun Oct 13 18:40:30 2002
@@ -32,6 +32,8 @@
#define SET_APIC_LOGICAL_ID(x) (((x)<<24))
#define APIC_ALL_CPUS 0xFF
#define APIC_DFR 0xE0
+#define APIC_DFR_CLUSTER 0x0FFFFFFFul
+#define APIC_DFR_FLAT 0xFFFFFFFFul
#define APIC_SPIV 0xF0
#define APIC_SPIV_FOCUS_DISABLED (1<<9)
#define APIC_SPIV_APIC_ENABLED (1<<8)
diff -urpN -X
/home/fletch/.diff.exclude virgin/include/asm-i386/smp.h subarch-1/include/asm-i386/smp.h
--- virgin/include/asm-i386/smp.h Fri Oct 11 21:22:09 2002
+++ subarch-1/include/asm-i386/smp.h Sun Oct 13 18:31:05 2002
@@ -21,17 +21,10 @@
#endif
#endif

-#ifdef CONFIG_SMP
-# ifdef CONFIG_CLUSTERED_APIC
-# define TARGET_CPUS 0xf /* all CPUs in *THIS* quad */
-# define INT_DELIVERY_MODE 0 /* physical delivery on LOCAL quad */
-# else
-# define TARGET_CPUS cpu_online_map
-# define INT_DELIVERY_MODE 1 /* logical delivery broadcast to all procs */
-# endif
+#ifdef CONFIG_CLUSTERED_APIC
+ #define INT_DELIVERY_MODE 0 /* physical delivery on LOCAL quad */
#else
-# define INT_DELIVERY_MODE 1 /* logical delivery */
-# define TARGET_CPUS
0x01
+ #define INT_DELIVERY_MODE 1 /* logical delivery broadcast to all procs */
#endif

#ifndef clustered_apic_mode
-
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