diff options
| author | Andrew Waterman <waterman@cs.berkeley.edu> | 2016-05-02 14:29:41 -0700 |
|---|---|---|
| committer | Andrew Waterman <waterman@cs.berkeley.edu> | 2016-05-02 14:29:41 -0700 |
| commit | e38b55f9b10204171b74343a5a73d041b7186caf (patch) | |
| tree | f167e958c2419a78bad21e09c0f53960073a5ec9 /benchmarks/common | |
| parent | 22742246287feda0be2666ba14ca6f4a6bc73bb2 (diff) | |
| download | riscv-tests-e38b55f9b10204171b74343a5a73d041b7186caf.zip riscv-tests-e38b55f9b10204171b74343a5a73d041b7186caf.tar.gz riscv-tests-e38b55f9b10204171b74343a5a73d041b7186caf.tar.bz2 | |
Stop using tohost/fromhost registers
Diffstat (limited to 'benchmarks/common')
| -rw-r--r-- | benchmarks/common/syscalls.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/benchmarks/common/syscalls.c b/benchmarks/common/syscalls.c index 4620631..9c72e36 100644 --- a/benchmarks/common/syscalls.c +++ b/benchmarks/common/syscalls.c @@ -14,6 +14,9 @@ // initialized in crt.S int have_vec; +volatile uint64_t tohost __attribute__((aligned(64))); +volatile uint64_t fromhost __attribute__((aligned(64))); + static long handle_frontend_syscall(long which, long arg0, long arg1, long arg2) { volatile uint64_t magic_mem[8] __attribute__((aligned(64))); @@ -22,8 +25,13 @@ static long handle_frontend_syscall(long which, long arg0, long arg1, long arg2) magic_mem[2] = arg1; magic_mem[3] = arg2; __sync_synchronize(); - write_csr(mtohost, (long)magic_mem); - while (swap_csr(mfromhost, 0) == 0); + + tohost = (uintptr_t)magic_mem; + while (fromhost == 0) + ; + fromhost = 0; + + __sync_synchronize(); return magic_mem[0]; } @@ -57,7 +65,7 @@ static int handle_stats(int enable) void tohost_exit(long code) { - write_csr(mtohost, (code << 1) | 1); + tohost = (code << 1) | 1; while (1); } |