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Subject[PATCH] linux-2.4.20-pre11_clustered-apic-tweaks_A0
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Marcelo, all, 

Originally I was going to send a larger patch that had the rest of the
needed changes for summit, but I've gone through and split that up even
more. This is similar to the earlier cleanup I sent you (although this
one compiles & boots on UP properly :), and just moves some code around
in preparation for further changes.

Again, this code originally comes from James Cleverdon's summit patch,
which I have been chopping/crushing/blending up into hopefully more
easily digestible pieces. Thus I deserve none of the credit, and all the
blame for this.

please consider for acceptance.

thanks
-john

diff -Nru a/arch/i386/kernel/apic.c b/arch/i386/kernel/apic.c
--- a/arch/i386/kernel/apic.c Wed Oct 16 15:52:39 2002
+++ b/arch/i386/kernel/apic.c Wed Oct 16 15:52:39 2002
@@ -261,6 +261,14 @@
apic_write_around(APIC_LVT1, value);
}

+static 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);
+}
+
void __init setup_local_APIC (void)
{
unsigned long value, ver, maxlvt;
@@ -304,9 +312,7 @@
* 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 -Nru a/arch/i386/kernel/io_apic.c b/arch/i386/kernel/io_apic.c
--- a/arch/i386/kernel/io_apic.c Wed Oct 16 15:52:39 2002
+++ b/arch/i386/kernel/io_apic.c Wed Oct 16 15:52:39 2002
@@ -1067,7 +1067,7 @@

old_id = mp_ioapics[apic].mpc_apicid;

- if (mp_ioapics[apic].mpc_apicid >= 0xf) {
+ if (mp_ioapics[apic].mpc_apicid >= apic_broadcast_id) {
printk(KERN_ERR "BIOS bug, IO-APIC#%d ID is %d in the MPC table!...\n",
apic, mp_ioapics[apic].mpc_apicid);
printk(KERN_ERR "... fixing up to %d. (tell your hw vendor)\n",
@@ -1086,7 +1086,7 @@
for (i = 0; i < 0xf; i++)
if (!(phys_id_present_map & (1 << i)))
break;
- if (i >= 0xf)
+ if (i >= apic_broadcast_id)
panic("Max APIC ID exceeded!\n");
printk(KERN_ERR "... fixing up to %d. (tell your hw vendor)\n",
i);
diff -Nru a/include/asm-i386/smpboot.h b/include/asm-i386/smpboot.h
--- a/include/asm-i386/smpboot.h Wed Oct 16 15:52:39 2002
+++ b/include/asm-i386/smpboot.h Wed Oct 16 15:52:39 2002
@@ -41,6 +41,9 @@
#endif /* CONFIG_X86_IO_APIC */
#endif /* CONFIG_X86_LOCAL_APIC */

+#define apic_broadcast_id (APIC_BROADCAST_ID_APIC)
+
+
#define TRAMPOLINE_LOW phys_to_virt((clustered_apic_mode == CLUSTERED_APIC_NUMAQ)?0x8:0x467)
#define TRAMPOLINE_HIGH phys_to_virt((clustered_apic_mode == CLUSTERED_APIC_NUMAQ)?0xa:0x469)



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