diff options
author | Markos Chandras <markos.chandras@imgtec.com> | 2008-02-05 14:51:48 +0000 |
---|---|---|
committer | Bernhard Reutner-Fischer <rep.dot.nop@gmail.com> | 2013-03-14 22:45:15 +0100 |
commit | 22686a1383c4a4a319eaaa6b16b1a9540114bd66 (patch) | |
tree | 04e12086f9187c150ba6a33db0368b9903e50363 /libc/sysdeps/linux/metag/brk.c | |
parent | 37439e66a31f251eba39604885f57099a43d943d (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/brk.c')
-rw-r--r-- | libc/sysdeps/linux/metag/brk.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/metag/brk.c b/libc/sysdeps/linux/metag/brk.c new file mode 100644 index 000000000..355e88fc7 --- /dev/null +++ b/libc/sysdeps/linux/metag/brk.c @@ -0,0 +1,38 @@ +/* + * Copyright (C) 2013 Imagination Technologies Ltd. + * + * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball. + */ + +#include <errno.h> +#include <unistd.h> +#include <sys/syscall.h> + +libc_hidden_proto(brk) + +/* This must be initialized data because commons can't have aliases. */ +void * __curbrk attribute_hidden = 0; + +int brk (void *addr) +{ + void *newbrk; + + __asm__ __volatile__ ("MOV D1Re0,%2\n\t" + "MOV D1Ar1,%1\n\t" + "SWITCH #0x440001\n\t" + "MOV %0,D0Re0" + : "=r" (newbrk) + : "r" (addr), "K" (__NR_brk) + : "D0Re0", "D1Re0", "D1Ar1"); + + __curbrk = newbrk; + + if (newbrk < addr) + { + __set_errno (ENOMEM); + return -1; + } + + return 0; +} +libc_hidden_def(brk) |