diff options
author | 2015-08-28 09:58:54 +0800 | |
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committer | 2015-09-01 12:44:00 +0800 | |
commit | e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch) | |
tree | 66b09f592c55df2878107a468a91d21506104d3f /qemu/roms/SLOF/clients/net-snk/kernel/timer.c | |
parent | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff) |
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/roms/SLOF/clients/net-snk/kernel/timer.c')
-rw-r--r-- | qemu/roms/SLOF/clients/net-snk/kernel/timer.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/qemu/roms/SLOF/clients/net-snk/kernel/timer.c b/qemu/roms/SLOF/clients/net-snk/kernel/timer.c new file mode 100644 index 000000000..2d8705895 --- /dev/null +++ b/qemu/roms/SLOF/clients/net-snk/kernel/timer.c @@ -0,0 +1,39 @@ +/****************************************************************************** + * Copyright (c) 2004, 2008 IBM Corporation + * All rights reserved. + * This program and the accompanying materials + * are made available under the terms of the BSD License + * which accompanies this distribution, and is available at + * http://www.opensource.org/licenses/bsd-license.php + * + * Contributors: + * IBM Corporation - initial implementation + *****************************************************************************/ + +#include <stdint.h> +#include "kernel.h" + +//******************************************************************* +// variable "tb_freq" contains the frequency in Hz +// and is read from the device tree (setup by LLFW) in "init.c" +uint64_t tb_freq; + +//------------------------------------------------------------------- +// Read the current timebase +uint64_t get_time(void) +{ + uint64_t act; + + __asm__ __volatile__( + "0: mftbu %0 ;\ + mftbl %%r0 ; \ + mftbu %%r4 ; \ + cmpw %0,%%r4 ; \ + bne 0b; \ + sldi %0,%0,32; \ + or %0,%0,%%r0" + : "=r"(act) + : /* no inputs */ + : "r0", "r4"); + return act; +} |