From 042eb37a04c9bf0cc76d14038a8ed35e3de713e2 Mon Sep 17 00:00:00 2001 From: Daniel Jacobowitz Date: Sun, 13 Sep 2009 09:54:41 -0400 Subject: Fix Linux task preemption on Versatile board 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 Signed-off-by: Aurelien Jarno --- hw/arm_sysctl.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'hw/arm_sysctl.c') diff --git a/hw/arm_sysctl.c b/hw/arm_sysctl.c index 686c1cc90d..26300ef8ad 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, get_ticks_per_sec()); case 0x60: /* MISC */ return 0; case 0x84: /* PROCID0 */ -- cgit v1.2.1