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| author | Peter Maydell <peter.maydell@linaro.org> | 2020-12-15 15:09:27 +0000 |
|---|---|---|
| committer | Philippe Mathieu-Daudé <f4bug@amsat.org> | 2021-01-04 23:24:44 +0100 |
| commit | 0ac1fb256742f665449c3dd02dd0ed7a5112cea1 (patch) | |
| tree | dc9b23520a0cb7a7da9a30049b44a521859f1e33 /target/mips/cpu.c | |
| parent | 554d523785ef8681905ec13ad28a025ec0af40fe (diff) | |
| download | qemu-0ac1fb256742f665449c3dd02dd0ed7a5112cea1.zip qemu-0ac1fb256742f665449c3dd02dd0ed7a5112cea1.tar.gz qemu-0ac1fb256742f665449c3dd02dd0ed7a5112cea1.tar.bz2 | |
target/mips: Don't use clock_get_ns() in clock period calculation
Currently the MIPS code uses the old clock_get_ns() API to
calculate a time length in nanoseconds:
cpu->cp0_count_rate * clock_get_ns(MIPS_CPU(cpu)->clock)
This relies on the clock having a period which is an exact number
of nanoseconds.
Switch to the new clock_ticks_to_ns() function, which does the
multiplication internally at a higher precision.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Luc Michel <luc@lmichel.fr>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20201215150929.30311-3-peter.maydell@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Diffstat (limited to 'target/mips/cpu.c')
| -rw-r--r-- | target/mips/cpu.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/target/mips/cpu.c b/target/mips/cpu.c index b2cd69f..2283214 100644 --- a/target/mips/cpu.c +++ b/target/mips/cpu.c @@ -380,8 +380,8 @@ static void mips_cp0_period_set(MIPSCPU *cpu) { CPUMIPSState *env = &cpu->env; - env->cp0_count_ns = cpu->cp0_count_rate - * clock_get_ns(MIPS_CPU(cpu)->clock); + env->cp0_count_ns = clock_ticks_to_ns(MIPS_CPU(cpu)->clock, + cpu->cp0_count_rate); assert(env->cp0_count_ns); } |