Changeset 0b414b5 in mainline for kernel/genarch/src/ofw/ebus.c

Timestamp:

2006-10-02T21:07:23Z (18 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

233af8c5

Parents:

36db5ac

Message:

Extend the OFW device tree node with a void pointer. The boot loader is
supposed to reset all pointers in all nodes. The kernel uses the pointer
to recognize that a particular device has already been visited and initialized.

Read interrupt mapping from the OFW device tree for FHC devices (z8530) and
EBUS devices (ns16550). In case of FHC devices, remove hardwired values from
the code and use only values read from the tree. FHC initialization is started
when a FHC device wants to map its interrupt. In case of EBUS devices, map
the interrupt to INO. Interrupt enabling in the interrupt controller for that
specific interrupt is not implemented yet.

File:

• kernel/genarch/src/ofw/ebus.c (modified) (2 diffs)

kernel/genarch/src/ofw/ebus.c

@@ -40 +40 @@
 #include <func.h>
 #include <panic.h>
+#include <debug.h>
 #include <macros.h>
 
@@ -74 +75 @@
 }
 
+bool ofw_ebus_map_interrupts(ofw_tree_node_t *node, ofw_ebus_reg_t *reg, uint32_t interrupt, int *ino)
+{
+        ofw_tree_property_t *prop;
+        ofw_tree_node_t *controller;
+        
+        prop = ofw_tree_getprop(node, "interrupt-map");
+        if (!prop || !prop->value)
+                return false;
+
+        ofw_ebus_intr_map_t *intr_map = prop->value;
+        count_t count = prop->size / sizeof(ofw_ebus_intr_map_t);
+        
+        ASSERT(count);
+        
+        prop = ofw_tree_getprop(node, "interrupt-map-mask");
+        if (!prop || !prop->value)
+                return false;
+        
+        ofw_ebus_intr_mask_t *intr_mask = prop->value;
+        
+        ASSERT(prop->size == sizeof(ofw_ebus_intr_mask_t));
+        
+        uint32_t space = reg->space & intr_mask->space_mask;
+        uint32_t addr = reg->addr & intr_mask->addr_mask;
+        uint32_t intr = interrupt & intr_mask->intr_mask;
+        
+        int i;
+        for (i = 0; i < count; i++) {
+                if ((intr_map[i].space == space) && (intr_map[i].addr == addr)
+                        && (intr_map[i].intr == intr))
+                        goto found;
+        }
+        return false;
+
+found:
+        /*
+         * We found the device that functions as an interrupt controller
+         * for the interrupt. We also found mapping from interrupt to INO.
+         */
+
+        controller = ofw_tree_find_node_by_handle(ofw_tree_lookup("/"), intr_map[i].controller_handle);
+        
+        *ino = intr_map[i].controller_ino;
+        return true;
+}
+
 /** @}
  */