Changeset cddc1639 in mainline for arch/sparc64/src/trap/trap.c

Timestamp:

2005-12-15T21:40:19Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

5753fbb

Parents:

36e7ee98

Message:

sparc64 work.
Add trap_install_handler().
Use trap_install_handler() to install register window clean, spill and fill handlers.

File:

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

arch/sparc64/src/trap/trap.c

@@ -29 +29 @@
 #include <arch/trap/trap.h>
 #include <arch/trap/trap_table.h>
+#include <arch/trap/regwin.h>
 #include <arch/asm.h>
 #include <memstr.h>
+#include <debug.h>
+#include <arch/types.h>
+#include <typedefs.h>
 
 /** Initialize trap table. */
@@ -39 +43 @@
          */
         memcpy((void *) trap_table, (void *) tba_read(), TRAP_TABLE_SIZE);
+        
+        /*
+         * Install kernel-provided handlers.
+         */
+        trap_install_handler(TT_CLEAN_WINDOW, CLEAN_WINDOW_HANDLER_SIZE, false);
+        trap_install_handler(TT_SPILL_0_NORMAL, SPILL_HANDLER_SIZE, false);
+        trap_install_handler(TT_FILL_0_NORMAL, FILL_HANDLER_SIZE, false);
 }
+
+/** Copy trap handler to active trap table.
+ *
+ * The handler is copied from trap_table_kernel to trap_handler.
+ *
+ * @param tt Trap type. An index that uniquelly identifies handler code.
+ * @param len Length of the handler in bytes. Must be multiple of TRAP_TABLE_ENTRY_SIZE (i.e. 32).
+ * @param tlnonz If false, tt is considered from the lower half of trap table. If true, the upper half is chosen.
+ */
+void trap_install_handler(index_t tt, size_t len, bool tlnonz)
+{
+        count_t cnt;
+        int i;
+
+        ASSERT(tt < TRAP_TABLE_ENTRY_COUNT/2);
+        ASSERT(len % TRAP_TABLE_ENTRY_SIZE == 0);
+
+        if (tlnonz)
+                tt += TRAP_TABLE_ENTRY_COUNT/2;
+
+        cnt = len/TRAP_TABLE_ENTRY_SIZE;
+        
+        for (i = tt; i < tt + cnt; i++) {
+                trap_table[i] = trap_table_kernel[i];
+        }       
+}