diff mbox series

[v4,15/21] hw/mips/mipssim: Correct CPU frequency

Message ID 20201012095804.3335117-16-f4bug@amsat.org
State Superseded
Headers show
Series hw/mips: Set CPU frequency | expand

Commit Message

Philippe Mathieu-Daudé Oct. 12, 2020, 9:57 a.m. UTC 
The MIPSsim machine CPU frequency is too fast running at 200 MHz,
while it should be 12 MHz for the 24K and 6 MHz for the 5K core.

Ref: Linux commit c78cbf49c4ed
("Support for MIPSsim, the cycle accurate MIPS simulator.")

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 hw/mips/mipssim.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/hw/mips/mipssim.c b/hw/mips/mipssim.c
index 5d4ad74828d..f0042f7f436 100644
--- a/hw/mips/mipssim.c
+++ b/hw/mips/mipssim.c
@@ -29,6 +29,7 @@ 
 #include "qapi/error.h"
 #include "qemu-common.h"
 #include "cpu.h"
+#include "hw/clock.h"
 #include "hw/mips/mips.h"
 #include "hw/mips/cpudevs.h"
 #include "hw/char/serial.h"
@@ -150,13 +151,21 @@  mips_mipssim_init(MachineState *machine)
     MemoryRegion *address_space_mem = get_system_memory();
     MemoryRegion *isa = g_new(MemoryRegion, 1);
     MemoryRegion *bios = g_new(MemoryRegion, 1);
+    Clock *cpuclk;
     MIPSCPU *cpu;
     CPUMIPSState *env;
     ResetData *reset_info;
     int bios_size;
 
+    cpuclk = clock_new(OBJECT(machine), "cpu-refclk");
+#ifdef TARGET_MIPS64
+    clock_set_hz(cpuclk, 6000000); /* 6 MHz */
+#else
+    clock_set_hz(cpuclk, 12000000); /* 12 MHz */
+#endif
+
     /* Init CPUs. */
-    cpu = MIPS_CPU(cpu_create(machine->cpu_type));
+    cpu = mips_cpu_create_with_clock(machine->cpu_type, cpuclk);
     env = &cpu->env;
 
     reset_info = g_malloc0(sizeof(ResetData));