summaryrefslogtreecommitdiffstats
path: root/arch/tile/include/asm/jump_label.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/tile/include/asm/jump_label.h')
-rw-r--r--arch/tile/include/asm/jump_label.h58
1 files changed, 58 insertions, 0 deletions
diff --git a/arch/tile/include/asm/jump_label.h b/arch/tile/include/asm/jump_label.h
new file mode 100644
index 000000000000..cde7573f397b
--- /dev/null
+++ b/arch/tile/include/asm/jump_label.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2015 Tilera Corporation. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, version 2.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for
+ * more details.
+ */
+
+#ifndef _ASM_TILE_JUMP_LABEL_H
+#define _ASM_TILE_JUMP_LABEL_H
+
+#include <arch/opcode.h>
+
+#define JUMP_LABEL_NOP_SIZE TILE_BUNDLE_SIZE_IN_BYTES
+
+static __always_inline bool arch_static_branch(struct static_key *key,
+ bool branch)
+{
+ asm_volatile_goto("1:\n\t"
+ "nop" "\n\t"
+ ".pushsection __jump_table, \"aw\"\n\t"
+ ".quad 1b, %l[l_yes], %0 + %1 \n\t"
+ ".popsection\n\t"
+ : : "i" (key), "i" (branch) : : l_yes);
+ return false;
+l_yes:
+ return true;
+}
+
+static __always_inline bool arch_static_branch_jump(struct static_key *key,
+ bool branch)
+{
+ asm_volatile_goto("1:\n\t"
+ "j %l[l_yes]" "\n\t"
+ ".pushsection __jump_table, \"aw\"\n\t"
+ ".quad 1b, %l[l_yes], %0 + %1 \n\t"
+ ".popsection\n\t"
+ : : "i" (key), "i" (branch) : : l_yes);
+ return false;
+l_yes:
+ return true;
+}
+
+typedef u64 jump_label_t;
+
+struct jump_entry {
+ jump_label_t code;
+ jump_label_t target;
+ jump_label_t key;
+};
+
+#endif /* _ASM_TILE_JUMP_LABEL_H */