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hw/mips/mipssim: Correct CPU frequency 

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>
Message-Id: <20201012095804.3335117-16-f4bug@amsat.org>
This commit is contained in:
Philippe Mathieu-Daudé 2020-10-12 11:57:58 +02:00
parent 3ca7639ff0
commit 8543a80691
1 changed files with 10 additions and 1 deletions
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11
hw/mips/mipssim.c
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@ -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));