diff options
| -rw-r--r-- | target/mips/cp0_timer.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/target/mips/cp0_timer.c b/target/mips/cp0_timer.c index 5194c967ae..6fec5fe0ff 100644 --- a/target/mips/cp0_timer.c +++ b/target/mips/cp0_timer.c @@ -27,7 +27,17 @@ #include "sysemu/kvm.h" #include "internal.h" -#define TIMER_PERIOD 10 /* 10 ns period for 100 Mhz frequency */ +/* + * Since commit 6af0bf9c7c3 this model assumes a CPU clocked at 200MHz + * and a CP0 timer running at half the clock of the CPU (cp0_count_rate = 2). + * + * TIMER_FREQ_HZ = CPU_FREQ_HZ / CP0_COUNT_RATE = 200 MHz / 2 = 100 MHz + * + * TIMER_PERIOD_NS = 1 / TIMER_FREQ_HZ = 10 ns + */ +#define CPU_FREQ_HZ_DEFAULT 200000000 +#define CP0_COUNT_RATE_DEFAULT 2 +#define TIMER_PERIOD 10 /* 1 / (CPU_FREQ_HZ / CP0_COUNT_RATE) */ /* MIPS R4K timer */ static void cpu_mips_timer_update(CPUMIPSState *env) |