Changeset 45b26dad in mainline for kernel/arch/sparc64/src/cpu/cpu.c

Timestamp:

2006-09-26T12:59:28Z (18 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

b44939b

Parents:

6ff1f1e

Message:

sparc64 work:

• Loader now starts all processors.
• Kernel halts all but the bootstrup processor for now.
• Read clock-frequency from the respective processor node in the device tree

File:

• kernel/arch/sparc64/src/cpu/cpu.c (modified) (2 diffs)

kernel/arch/sparc64/src/cpu/cpu.c

@@ -36 +36 @@
 #include <cpu.h>
 #include <arch.h>
+#include <print.h>
 #include <arch/register.h>
-#include <print.h>
-#include <arch/boot/boot.h>
+#include <genarch/ofw/ofw_tree.h>
+#include <arch/types.h>
+#include <arch/drivers/tick.h>
 
+/** Perform sparc64 specific initialization of the processor structure for the current processor. */
 void cpu_arch_init(void)
 {
-        CPU->arch.clock_frequency = bootinfo.processor.clock_frequency;
+        ofw_tree_node_t *node;
+        uint32_t mid;
+        uint32_t clock_frequency = 0;
+        upa_config_t upa_config;
+        
+        upa_config.value = upa_config_read();
+        node = ofw_tree_find_child_by_device_type(ofw_tree_lookup("/"), "cpu");
+        while (node) {
+                ofw_tree_property_t *prop;
+                
+                prop = ofw_tree_getprop(node, "upa-portid");
+                if (prop && prop->value) {
+                        mid = *((uint32_t *) prop->value);
+                        if (mid == upa_config.mid) {
+                                prop = ofw_tree_getprop(node, "clock-frequency");
+                                if (prop && prop->value)
+                                        clock_frequency = *((uint32_t *) prop->value);
+                        }
+                }
+                node = ofw_tree_find_peer_by_device_type(node, "cpu");
+        }
+
+        CPU->arch.clock_frequency = clock_frequency;
+        tick_init();
 }
 
+/** Read version information from the current processor. */
 void cpu_identify(void)
 {
@@ -50 +77 @@
 }
 
+/** Print version information for a processor.
+ *
+ * @param m Processor structure of the CPU for which version information is to be printed.
+ */
 void cpu_print_report(cpu_t *m)
 {