diff options
author | Markos Chandras <markos.chandras@imgtec.com> | 2008-02-05 14:51:48 +0000 |
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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/bits/syscalls.h | |
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/bits/syscalls.h')
-rw-r--r-- | libc/sysdeps/linux/metag/bits/syscalls.h | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/metag/bits/syscalls.h b/libc/sysdeps/linux/metag/bits/syscalls.h new file mode 100644 index 000000000..b5c8fc58c --- /dev/null +++ b/libc/sysdeps/linux/metag/bits/syscalls.h @@ -0,0 +1,99 @@ +/* + * Copyright (C) 2013 Imagination Technologies Ltd. + * + * Licensed under LGPL v2.1 or later, see the file COPYING.LIB in this tarball. + * + */ + +#ifndef _BITS_SYSCALLS_H +#define _BITS_SYSCALLS_H +#ifndef _SYSCALL_H +# error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead." +#endif + +/* + Meta version adapted from the ARM version. +*/ + +#define SYS_ify(syscall_name) (__NR_##syscall_name) + +#ifdef __ASSEMBLER__ + +/* Call a given syscall, with arguments loaded. */ +#undef DO_CALL +#define DO_CALL(syscall_name, args) \ + MOV D1Re0, #SYS_ify (syscall_name); \ + SWITCH #0x440001 + +#else + +#include <errno.h> + +#undef INLINE_SYSCALL_NCS +#define INLINE_SYSCALL_NCS(name, nr, args...) \ +(__extension__ \ + ({ unsigned int _inline_sys_result = INTERNAL_SYSCALL_NCS (name, , nr, args); \ + if (unlikely(INTERNAL_SYSCALL_ERROR_P (_inline_sys_result, ))) \ + { \ + __set_errno (INTERNAL_SYSCALL_ERRNO (_inline_sys_result, )); \ + _inline_sys_result = (unsigned int) -1; \ + } \ + (int) _inline_sys_result; }) \ +) + +#undef INTERNAL_SYSCALL_DECL +#define INTERNAL_SYSCALL_DECL(err) do { } while (0) + +#undef INTERNAL_SYSCALL_NCS +#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \ +(__extension__ \ + ({unsigned int __sys_result; \ + { \ + register int _result __asm__ ("D0Re0"), _nr __asm__ ("D1Re0"); \ + LOAD_ARGS_##nr (args); \ + _nr = (name); \ + __asm__ volatile ("SWITCH #0x440001 ! syscall " #name \ + : "=r" (_result) \ + : "d" (_nr) ASM_ARGS_##nr \ + : "memory"); \ + __sys_result = _result; \ + } \ + (int) __sys_result; }) \ +) + +#undef INTERNAL_SYSCALL_ERROR_P +#define INTERNAL_SYSCALL_ERROR_P(val, err) \ + ((unsigned int) (val) >= 0xfffff001u) + +#undef INTERNAL_SYSCALL_ERRNO +#define INTERNAL_SYSCALL_ERRNO(val, err) (-(val)) + +#define LOAD_ARGS_0() +#define ASM_ARGS_0 +#define LOAD_ARGS_1(a1) \ + register int _a1 __asm__ ("D1Ar1") = (int) (a1); \ + LOAD_ARGS_0 () +#define ASM_ARGS_1 ASM_ARGS_0, "d" (_a1) +#define LOAD_ARGS_2(a1, a2) \ + register int _a2 __asm__ ("D0Ar2") = (int) (a2); \ + LOAD_ARGS_1 (a1) +#define ASM_ARGS_2 ASM_ARGS_1, "d" (_a2) +#define LOAD_ARGS_3(a1, a2, a3) \ + register int _a3 __asm__ ("D1Ar3") = (int) (a3); \ + LOAD_ARGS_2 (a1, a2) +#define ASM_ARGS_3 ASM_ARGS_2, "d" (_a3) +#define LOAD_ARGS_4(a1, a2, a3, a4) \ + register int _a4 __asm__ ("D0Ar4") = (int) (a4); \ + LOAD_ARGS_3 (a1, a2, a3) +#define ASM_ARGS_4 ASM_ARGS_3, "d" (_a4) +#define LOAD_ARGS_5(a1, a2, a3, a4, a5) \ + register int _a5 __asm__ ("D1Ar5") = (int) (a5); \ + LOAD_ARGS_4 (a1, a2, a3, a4) +#define ASM_ARGS_5 ASM_ARGS_4, "d" (_a5) +#define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6) \ + register int _a6 __asm__ ("D0Ar6") = (int) (a6); \ + LOAD_ARGS_5 (a1, a2, a3, a4, a5) +#define ASM_ARGS_6 ASM_ARGS_5, "d" (_a6) + +#endif /* __ASSEMBLER__ */ +#endif /* _BITS_SYSCALLS_H */ |