Add support for the Meta architecture

Meta cores are 32-bit, hardware multithreaded, general purpose, embedded
processors which also feature a DSP instruction set, and can be found in
many digital radios. They are capable of running different operating
systems on different hardware threads, for example a digital radio might
run RTOSes for DAB decoding and audio decoding on 3 hardware threads,
and run Linux on the 4th hardware thread to manage the user interface,
networking etc. HTPs are also capable of running SMP Linux on multiple
hardware threads.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

1 files changed, 44 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/metag/bits/setjmp.h b/libc/sysdeps/linux/metag/bits/setjmp.h
new file mode 100644
index 000000000..8ad4b12d2
--- /dev/null
+++ b/libc/sysdeps/linux/metag/bits/setjmp.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2013, Imagination Technologies Ltd.
+ *
+ * Licensed under LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ */
+
+/* Define the machine-dependent type `jmp_buf' */
+#ifndef _BITS_SETJMP_H
+#define _BITS_SETJMP_H	1
+
+#if !defined _SETJMP_H && !defined _PTHREAD_H
+# error "Never include <bits/setjmp.h> directly; use <setjmp.h> instead."
+#endif
+
+/*
+   jmp_buf[0] - A0StP
+   jmp_buf[1] - A1GbP
+   jmp_buf[2] - A0FrP
+   jmp_buf[3] - A1LbP
+   jmp_buf[4] - D0FrT
+   jmp_buf[5] - D1RtP
+   jmp_buf[6] - D0.5
+   jmp_buf[7] - D1.5
+   jmp_buf[8] - D0.6
+   jmp_buf[9] - D1.6
+   jmp_buf[10] - D0.7
+   jmp_buf[11] - D1.7
+   */
+
+#define _JBLEN 24
+#if     defined (__USE_MISC) || defined (_ASM)
+#define JB_SP 0
+#endif
+
+#ifndef	_ASM
+typedef int __jmp_buf[_JBLEN] __attribute__((aligned (8)));
+#endif
+
+/* Test if longjmp to JMPBUF would unwind the frame
+   containing a local variable at ADDRESS.  */
+#define _JMPBUF_UNWINDS(jmpbuf, address) \
+  ((void *) (address) > (void *) (jmpbuf)[JB_SP])
+
+#endif	/* bits/setjmp.h */