give compiler more room to optimize rpc invocation

+ Try to write arguments to memory as fast as possible to free up some
  registers that the compiler can then play with.
  Qemu runs ~1 700 000 rpc's per second, visionfive2 @1GHz (I think) ~800 000.

3 files changed, 2 insertions, 2 deletions

diff --git a/arch/riscv64/conf/init b/arch/riscv64/conf/init
index 76de753..c372029 100755
--- a/arch/riscv64/conf/init
+++ b/arch/riscv64/conf/init
diff --git a/arch/riscv64/conf/init.c b/arch/riscv64/conf/init.c
index 8177992..001d5eb 100644
--- a/arch/riscv64/conf/init.c
+++ b/arch/riscv64/conf/init.c
@@ -268,8 +268,6 @@ void _start()
 
 	uint64_t n = 0, i, start, cn, cstart, cend;
 	start = i = sys_ticks();
-	print_value("Start ticks", start);
-
 	csr_read(CSR_CYCLE, cstart);
 	while (i < start + second) {
 		i = sys_ticks();
@@ -277,6 +275,7 @@ void _start()
 	}
 	csr_read(CSR_CYCLE, cend);
 
+	print_value("Start ticks", start);
 	print_value("End ticks", i);
 	print_value("Syscalls per second", n);
 	print_value("Executed cycles per second", cend - cstart);
@@ -326,6 +325,7 @@ void _start()
 	puts("Checking shared memory\n");
 	struct ipc_args r = sys_ipc_req(1, 1, 0, 0, 0);
 	rw_buf = (char *)r.a1;
+	rw_buf_size = (size_t)r.a2;
 	print_value("Shared memory ptr", (uintptr_t)rw_buf);
 	print_value("Shared memory size", rw_buf_size);
 
diff --git a/arch/riscv64/conf/initrd b/arch/riscv64/conf/initrd
index e4d76a2..a489f3a 100644
--- a/arch/riscv64/conf/initrd
+++ b/arch/riscv64/conf/initrd