[POWERPC] Move xics_setup_8259_cascade() into platforms/pseries/setup.c

The code in xics.c to setup the i8259 cascaded irq handler is not really
xics specific, so move it into setup.c - we will clean this up further in
a subsequent patch.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index fccca89..bef4f68 100644 (file)
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -124,6 +124,51 @@ void pseries_8259_cascade(unsigned int irq, struct irq_desc *desc)
        desc->chip->eoi(irq);
 }
 
+static void __init xics_setup_8259_cascade(void)
+{
+       struct device_node *np, *old, *found = NULL;
+       int cascade, naddr;
+       const u32 *addrp;
+       unsigned long intack = 0;
+
+       for_each_node_by_type(np, "interrupt-controller")
+               if (of_device_is_compatible(np, "chrp,iic")) {
+                       found = np;
+                       break;
+               }
+       if (found == NULL) {
+               printk(KERN_DEBUG "xics: no ISA interrupt controller\n");
+               return;
+       }
+       cascade = irq_of_parse_and_map(found, 0);
+       if (cascade == NO_IRQ) {
+               printk(KERN_ERR "xics: failed to map cascade interrupt");
+               return;
+       }
+       pr_debug("xics: cascade mapped to irq %d\n", cascade);
+
+       for (old = of_node_get(found); old != NULL ; old = np) {
+               np = of_get_parent(old);
+               of_node_put(old);
+               if (np == NULL)
+                       break;
+               if (strcmp(np->name, "pci") != 0)
+                       continue;
+               addrp = of_get_property(np, "8259-interrupt-acknowledge", NULL);
+               if (addrp == NULL)
+                       continue;
+               naddr = of_n_addr_cells(np);
+               intack = addrp[naddr-1];
+               if (naddr > 1)
+                       intack |= ((unsigned long)addrp[naddr-2]) << 32;
+       }
+       if (intack)
+               printk(KERN_DEBUG "xics: PCI 8259 intack at 0x%016lx\n", intack);
+       i8259_init(found, intack);
+       of_node_put(found);
+       set_irq_chained_handler(cascade, pseries_8259_cascade);
+}
+
 static void __init pseries_mpic_init_IRQ(void)
 {
        struct device_node *np, *old, *cascade = NULL;
@@ -203,6 +248,12 @@ static void __init pseries_mpic_init_IRQ(void)
        set_irq_chained_handler(cascade_irq, pseries_8259_cascade);
 }
 
+static void __init pseries_xics_init_IRQ(void)
+{
+       xics_init_IRQ();
+       xics_setup_8259_cascade();
+}
+
 static void pseries_lpar_enable_pmcs(void)
 {
        unsigned long set, reset;
@@ -232,7 +283,7 @@ static void __init pseries_discover_pic(void)
                        smp_init_pseries_mpic();
                        return;
                } else if (strstr(typep, "ppc-xicp")) {
-                       ppc_md.init_IRQ       = xics_init_IRQ;
+                       ppc_md.init_IRQ       = pseries_xics_init_IRQ;
                        setup_kexec_cpu_down_xics();
                        smp_init_pseries_xics();
                        return;

diff --git a/arch/powerpc/platforms/pseries/xics.c b/arch/powerpc/platforms/pseries/xics.c
index a977f20..c3f05d4 100644 (file)
--- a/arch/powerpc/platforms/pseries/xics.c
+++ b/arch/powerpc/platforms/pseries/xics.c
@@ -655,52 +655,6 @@ static void __init xics_init_one_node(struct device_node *np,
        }
 }
 
-
-static void __init xics_setup_8259_cascade(void)
-{
-       struct device_node *np, *old, *found = NULL;
-       int cascade, naddr;
-       const u32 *addrp;
-       unsigned long intack = 0;
-
-       for_each_node_by_type(np, "interrupt-controller")
-               if (of_device_is_compatible(np, "chrp,iic")) {
-                       found = np;
-                       break;
-               }
-       if (found == NULL) {
-               printk(KERN_DEBUG "xics: no ISA interrupt controller\n");
-               return;
-       }
-       cascade = irq_of_parse_and_map(found, 0);
-       if (cascade == NO_IRQ) {
-               printk(KERN_ERR "xics: failed to map cascade interrupt");
-               return;
-       }
-       pr_debug("xics: cascade mapped to irq %d\n", cascade);
-
-       for (old = of_node_get(found); old != NULL ; old = np) {
-               np = of_get_parent(old);
-               of_node_put(old);
-               if (np == NULL)
-                       break;
-               if (strcmp(np->name, "pci") != 0)
-                       continue;
-               addrp = of_get_property(np, "8259-interrupt-acknowledge", NULL);
-               if (addrp == NULL)
-                       continue;
-               naddr = of_n_addr_cells(np);
-               intack = addrp[naddr-1];
-               if (naddr > 1)
-                       intack |= ((unsigned long)addrp[naddr-2]) << 32;
-       }
-       if (intack)
-               printk(KERN_DEBUG "xics: PCI 8259 intack at 0x%016lx\n", intack);
-       i8259_init(found, intack);
-       of_node_put(found);
-       set_irq_chained_handler(cascade, pseries_8259_cascade);
-}
-
 void __init xics_init_IRQ(void)
 {
        struct device_node *np;
@@ -733,8 +687,6 @@ void __init xics_init_IRQ(void)
 
        xics_setup_cpu();
 
-       xics_setup_8259_cascade();
-
        ppc64_boot_msg(0x21, "XICS Done");
 }
 

diff --git a/arch/powerpc/platforms/pseries/xics.h b/arch/powerpc/platforms/pseries/xics.h
index c26bcff..1c5321a 100644 (file)
--- a/arch/powerpc/platforms/pseries/xics.h
+++ b/arch/powerpc/platforms/pseries/xics.h
@@ -28,7 +28,4 @@ struct xics_ipi_struct {
 
 extern struct xics_ipi_struct xics_ipi_message[NR_CPUS] __cacheline_aligned;
 
-struct irq_desc;
-extern void pseries_8259_cascade(unsigned int irq, struct irq_desc *desc);
-
 #endif /* _POWERPC_KERNEL_XICS_H */