summaryrefslogtreecommitdiff
path: root/libc/sysdeps/linux/metag/syscall.c
diff options
context:
space:
mode:
authorMarkos Chandras <markos.chandras@imgtec.com>2008-02-05 14:51:48 +0000
committerBernhard Reutner-Fischer <rep.dot.nop@gmail.com>2013-03-14 22:45:15 +0100
commit22686a1383c4a4a319eaaa6b16b1a9540114bd66 (patch)
tree04e12086f9187c150ba6a33db0368b9903e50363 /libc/sysdeps/linux/metag/syscall.c
parent37439e66a31f251eba39604885f57099a43d943d (diff)
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>
Diffstat (limited to 'libc/sysdeps/linux/metag/syscall.c')
-rw-r--r--libc/sysdeps/linux/metag/syscall.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/metag/syscall.c b/libc/sysdeps/linux/metag/syscall.c
new file mode 100644
index 000000000..93aabf3e0
--- /dev/null
+++ b/libc/sysdeps/linux/metag/syscall.c
@@ -0,0 +1,40 @@
+/* syscall for META/uClibc
+ *
+ * Copyright (C) 2013 Imagination Technologies
+ *
+ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ */
+
+#include <features.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/syscall.h>
+
+long syscall(long sysnum,
+ long arg1, long arg2, long arg3,
+ long arg4, long arg5, long arg6)
+{
+
+ register long __call __asm__ ("D1Re0") = sysnum;
+ register long __res __asm__ ("D0Re0");
+ register long __a __asm__ ("D1Ar1") = arg1;
+ register long __b __asm__ ("D0Ar2") = arg2;
+ register long __c __asm__ ("D1Ar3") = arg3;
+ register long __d __asm__ ("D0Ar4") = arg4;
+ register long __e __asm__ ("D1Ar5") = arg5;
+ register long __f __asm__ ("D0Ar6") = arg6;
+
+
+ __asm__ __volatile__ ("SWITCH #0x440001"
+ : "=d" (__res)
+ : "d" (__call), "d" (__a), "d" (__b),
+ "d" (__c), "d" (__d), "d" (__e) , "d" (__f)
+ : "memory");
+
+ if(__res >= (unsigned long) -4095) {
+ long err = __res;
+ (*__errno_location()) = (-err);
+ __res = (unsigned long) -1;
+ }
+ return (long) __res;
+}