x86: Unify 3 similar ways of saving mp_irqs info

There are 3 places defining similar functions of saving IRQ vector
info into mp_irqs[] array: mmparse/acpi/mrst.

Replace the redundant code by a common function in io_apic.c as it's
only called when CONFIG_X86_IO_APIC=y

Signed-off-by: Feng Tang <feng.tang@intel.com>
Cc: Alan Cox <alan@linux.intel.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <20101207133204.4d913c5a@feng-i7>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 54 insertions, 0 deletions

diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 8a0215042a5f..c6b44f78ac14 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -126,6 +126,59 @@ static int __init parse_noapic(char *str)
 }
 early_param("noapic", parse_noapic);
 
+static void assign_to_mp_irq(struct mpc_intsrc *m,
+                                    struct mpc_intsrc *mp_irq)
+{
+        mp_irq->dstapic = m->dstapic;
+        mp_irq->type = m->type;
+        mp_irq->irqtype = m->irqtype;
+        mp_irq->irqflag = m->irqflag;
+        mp_irq->srcbus = m->srcbus;
+        mp_irq->srcbusirq = m->srcbusirq;
+        mp_irq->dstirq = m->dstirq;
+}
+
+static int mp_irq_mpc_intsrc_cmp(struct mpc_intsrc *mp_irq,
+                                        struct mpc_intsrc *m)
+{
+        if (mp_irq->dstapic != m->dstapic)
+                return 1;
+        if (mp_irq->type != m->type)
+                return 2;
+        if (mp_irq->irqtype != m->irqtype)
+                return 3;
+        if (mp_irq->irqflag != m->irqflag)
+                return 4;
+        if (mp_irq->srcbus != m->srcbus)
+                return 5;
+        if (mp_irq->srcbusirq != m->srcbusirq)
+                return 6;
+        if (mp_irq->dstirq != m->dstirq)
+                return 7;
+
+        return 0;
+}
+
+/* Will be called in mpparse/acpi/sfi codes for saving IRQ info */
+void mp_save_irq(struct mpc_intsrc *m)
+{
+        int i;
+
+        apic_printk(APIC_VERBOSE, "Int: type %d, pol %d, trig %d, bus %02x,"
+                " IRQ %02x, APIC ID %x, APIC INT %02x\n",
+                m->irqtype, m->irqflag & 3, (m->irqflag >> 2) & 3, m->srcbus,
+                m->srcbusirq, m->dstapic, m->dstirq);
+
+        for (i = 0; i < mp_irq_entries; i++) {
+                if (!mp_irq_mpc_intsrc_cmp(&mp_irqs[i], m))
+                        return;
+        }
+
+        assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
+        if (++mp_irq_entries == MAX_IRQ_SOURCES)
+                panic("Max # of irq sources exceeded!!\n");
+}
+
 struct irq_pin_list {
         int apic, pin;
         struct irq_pin_list *next;
@@ -136,6 +189,7 @@ static struct irq_pin_list *alloc_irq_pin_list(int node)
         return kzalloc_node(sizeof(struct irq_pin_list), GFP_KERNEL, node);
 }
 
+
 /* irq_cfg is indexed by the sum of all RTEs in all I/O APICs. */
 #ifdef CONFIG_SPARSE_IRQ
 static struct irq_cfg irq_cfgx[NR_IRQS_LEGACY];