diff options
| author | Aurelien Jarno <aurelien@aurel32.net> | 2009-09-15 00:30:41 +0200 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2009-09-15 00:30:41 +0200 |
| commit | bdebf0094c7e147daac27236b5388910e9deb6a4 (patch) | |
| tree | 4b85f3ac114e5d693c84a17af6b7427f75172503 | |
| parent | 530942382809bfda7aa19d5f9007a6e31f0594e0 (diff) | |
| download | qemu-bdebf0094c7e147daac27236b5388910e9deb6a4.tar.gz | |
Fix Linux task preemption on Versatile board
Backport from master:
Recent versions of the Linux kernel will not preempt CPU-intensive
tasks unless the clock used by sched_clock() works. On -M versatilepb
that's the 24MHz timer in the system controller. It's a very simple
timer, so implement it.
Signed-off-by: Daniel Jacobowitz <dan@codesourcery.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
| -rw-r--r-- | hw/arm_sysctl.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/hw/arm_sysctl.c b/hw/arm_sysctl.c index bb005c8015..cf5d46e972 100644 --- a/hw/arm_sysctl.c +++ b/hw/arm_sysctl.c @@ -7,6 +7,8 @@ * This code is licenced under the GPL. */ +#include "hw.h" +#include "qemu-timer.h" #include "sysbus.h" #include "primecell.h" #include "sysemu.h" @@ -71,8 +73,7 @@ static uint32_t arm_sysctl_read(void *opaque, target_phys_addr_t offset) case 0x58: /* BOOTCS */ return 0; case 0x5c: /* 24MHz */ - /* ??? not implemented. */ - return 0; + return muldiv64(qemu_get_clock(vm_clock), 24000000, ticks_per_sec); case 0x60: /* MISC */ return 0; case 0x84: /* PROCID0 */ |