patch-2.2.14 linux/arch/i386/kernel/smp.c

• Lines: 86
• Date: Tue Jan 4 10:12:11 2000
• Orig file: v2.2.13/linux/arch/i386/kernel/smp.c
• Orig date: Tue Jan 4 11:10:31 2000

diff -u --recursive --new-file v2.2.13/linux/arch/i386/kernel/smp.c linux/arch/i386/kernel/smp.c
@@ -114,7 +114,6 @@
 volatile unsigned long kstack_ptr;			/* Stack vector for booting CPUs			*/
 struct cpuinfo_x86 cpu_data[NR_CPUS];			/* Per CPU bogomips and other parameters 		*/
 static unsigned int num_processors = 1;			/* Internal processor count				*/
-unsigned long mp_ioapic_addr = 0xFEC00000;		/* Address of the I/O apic (not yet used) 		*/
 unsigned char boot_cpu_id = 0;				/* Processor that is doing the boot up 			*/
 static int smp_activated = 0;				/* Tripped once we need to start cross invalidating 	*/
 int apic_version[NR_CPUS];				/* APIC version number					*/
@@ -128,6 +127,8 @@
 const char lk_lockmsg[] = "lock from interrupt context at %p\n"; 
 
 int mp_bus_id_to_type [MAX_MP_BUSSES] = { -1, };
+extern int mp_apic_entries;
+extern struct mpc_config_ioapic mp_apics [MAX_IO_APICS];
 extern int mp_irq_entries;
 extern struct mpc_config_intsrc mp_irqs [MAX_IRQ_SOURCES];
 extern int mpc_default_type;
@@ -367,11 +368,9 @@
 					printk("I/O APIC #%d Version %d at 0x%lX.\n",
 						m->mpc_apicid,m->mpc_apicver,
 						m->mpc_apicaddr);
-					/*
-					 * we use the first one only currently
-					 */
-					if (ioapics == 1)
-						mp_ioapic_addr = m->mpc_apicaddr;
+					mp_apics [mp_apic_entries] = *m;
+					if (++mp_apic_entries > MAX_IO_APICS)
+						--mp_apic_entries;
 				}
 				mpt+=sizeof(*m);
 				count+=sizeof(*m);
@@ -403,9 +402,9 @@
 			}
 		}
 	}
-	if (ioapics > 1)
+	if (ioapics > MAX_IO_APICS)
 	{
-		printk("Warning: Multiple IO-APICs not yet supported.\n");
+		printk("Warning: Max I/O APICs exceeded (max %d, found %d).\n", MAX_IO_APICS, ioapics);
 		printk("Warning: switching to non APIC mode.\n");
 		skip_ioapic_setup=1;
 	}
@@ -493,6 +492,8 @@
 					cpu_present_map=3;
 					num_processors=2;
 					printk("I/O APIC at 0xFEC00000.\n");
+					mp_apics[0].mpc_apicaddr = 0xFEC00000;
+					mp_apic_entries = 1;
 
 					/*
 					 * Save the default type number, we
@@ -772,18 +773,22 @@
 
 #ifdef CONFIG_X86_IO_APIC
 	{
-		unsigned long ioapic_phys;
+		unsigned long ioapic_phys, idx = FIX_IO_APIC_BASE_0;
+		int i;
 
-		if (smp_found_config) {
-			ioapic_phys = mp_ioapic_addr;
-		} else {
-			ioapic_phys = __pa(memory_start);
-			memset((void *)memory_start, 0, PAGE_SIZE);
-			memory_start += PAGE_SIZE;
+		for (i = 0; i < mp_apic_entries; i++) {
+			if (smp_found_config) {
+				ioapic_phys = mp_apics[i].mpc_apicaddr;
+			} else {
+				ioapic_phys = __pa(memory_start);
+				memset((void *)memory_start, 0, PAGE_SIZE);
+				memory_start += PAGE_SIZE;
+			}
+			set_fixmap(idx,ioapic_phys);
+			printk("mapped IOAPIC to %08lx (%08lx)\n",
+					__fix_to_virt(idx), ioapic_phys);
+			idx++;
 		}
-		set_fixmap(FIX_IO_APIC_BASE,ioapic_phys);
-		printk("mapped IOAPIC to %08lx (%08lx)\n",
-				fix_to_virt(FIX_IO_APIC_BASE), ioapic_phys);
 	}
 #endif