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author | Max Filippov <jcmvbkbc@gmail.com> | 2012-09-17 05:44:35 +0400 |
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committer | Chris Zankel <chris@zankel.net> | 2012-10-04 02:11:25 +0400 |
commit | 717460ee3e8399eb66799cac0bb83217475b7027 (patch) | |
tree | f14d582c9a024a292e6b85dc899ebe59b0e7c972 /arch/xtensa/platforms/iss/include/platform/simcall.h | |
parent | 33c8213d6930cfa1d09e2912b9e2d59f251c33b7 (diff) | |
download | linux-717460ee3e8399eb66799cac0bb83217475b7027.tar.xz |
xtensa: ISS: fix __simc implementation
Do not rely on compiler implicitly placing function arguments into
specifc registers, place them explicitly.
Move __simc and related helpers to platform/simcall.h
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
Diffstat (limited to 'arch/xtensa/platforms/iss/include/platform/simcall.h')
-rw-r--r-- | arch/xtensa/platforms/iss/include/platform/simcall.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/arch/xtensa/platforms/iss/include/platform/simcall.h b/arch/xtensa/platforms/iss/include/platform/simcall.h index b7952c06a2b7..8c43bfea05e1 100644 --- a/arch/xtensa/platforms/iss/include/platform/simcall.h +++ b/arch/xtensa/platforms/iss/include/platform/simcall.h @@ -57,6 +57,59 @@ #define XTISS_SELECT_ONE_WRITE 2 #define XTISS_SELECT_ONE_EXCEPT 3 +static int errno; + +static inline int __simc(int a, int b, int c, int d, int e, int f) +{ + int ret; + register int a1 asm("a2") = a; + register int b1 asm("a3") = b; + register int c1 asm("a4") = c; + register int d1 asm("a5") = d; + register int e1 asm("a6") = e; + register int f1 asm("a7") = f; + __asm__ __volatile__ ( + "simcall\n" + "mov %0, a2\n" + "mov %1, a3\n" + : "=a" (ret), "=a" (errno), "+r"(a1), "+r"(b1) + : "r"(c1), "r"(d1), "r"(e1), "r"(f1) + : ); + return ret; +} + +static inline int simc_open(char *file, int flags, int mode) +{ + return __simc(SYS_open, (int) file, flags, mode, 0, 0); +} + +static inline int simc_close(int fd) +{ + return __simc(SYS_close, fd, 0, 0, 0, 0); +} + +static inline int simc_ioctl(int fd, int request, void *arg) +{ + return __simc(SYS_ioctl, fd, request, (int) arg, 0, 0); +} + +static inline int simc_read(int fd, void *buf, size_t count) +{ + return __simc(SYS_read, fd, (int) buf, count, 0, 0); +} + +static inline int simc_write(int fd, void *buf, size_t count) +{ + return __simc(SYS_write, fd, (int) buf, count, 0, 0); +} + +static inline int simc_poll(int fd) +{ + struct timeval tv = { .tv_sec = 0, .tv_usec = 0 }; + + return __simc(SYS_select_one, fd, XTISS_SELECT_ONE_READ, (int)&tv, + 0, 0); +} #endif /* _XTENSA_PLATFORM_ISS_SIMCALL_H */ |