powerpc: Merge i8259.c into arch/powerpc/sysdev

This changes the parameters for i8259_init so that it takes two
parameters: a physical address for generating an interrupt
acknowledge cycle, and an interrupt number offset.  i8259_init
now sets the irq_desc[] for its interrupts; all the callers
were doing this, and that code is gone now.  This also defines
a CONFIG_PPC_I8259 symbol to select i8259.o for inclusion, and
makes the platforms that need it select that symbol.

Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 4 insertions, 15 deletions

diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index 92d18003f152..0fa5beae6d1b 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -87,7 +87,6 @@ extern int pSeries_machine_check_exception(struct pt_regs *regs);
 static void pseries_shared_idle(void);
 static void pseries_dedicated_idle(void);
 
-static volatile void __iomem * chrp_int_ack_special;
 struct mpic *pSeries_mpic;
 
 void pSeries_show_cpuinfo(struct seq_file *m)
@@ -119,19 +118,11 @@ static void __init fwnmi_init(void)
                 fwnmi_active = 1;
 }
 
-static int pSeries_irq_cascade(struct pt_regs *regs, void *data)
-{
-        if (chrp_int_ack_special)
-                return readb(chrp_int_ack_special);
-        else
-                return i8259_irq(regs);
-}
-
 static void __init pSeries_init_mpic(void)
 {
         unsigned int *addrp;
         struct device_node *np;
-        int i;
+        unsigned long intack = 0;
 
         /* All ISUs are setup, complete initialization */
         mpic_init(pSeries_mpic);
@@ -142,16 +133,14 @@ static void __init pSeries_init_mpic(void)
                  get_property(np, "8259-interrupt-acknowledge", NULL)))
                 printk(KERN_ERR "Cannot find pci to get ack address\n");
         else
-                chrp_int_ack_special = ioremap(addrp[prom_n_addr_cells(np)-1], 1);
+                intack = addrp[prom_n_addr_cells(np)-1];
         of_node_put(np);
 
         /* Setup the legacy interrupts & controller */
-        for (i = 0; i < NUM_ISA_INTERRUPTS; i++)
-                irq_desc[i].handler = &i8259_pic;
-        i8259_init(0);
+        i8259_init(intack, 0);
 
         /* Hook cascade to mpic */
-        mpic_setup_cascade(NUM_ISA_INTERRUPTS, pSeries_irq_cascade, NULL);
+        mpic_setup_cascade(NUM_ISA_INTERRUPTS, i8259_irq_cascade, NULL);
 }
 
 static void __init pSeries_setup_mpic(void)