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cpu: Add CPU information to pa_core

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This retains CPU information (processor type and supported features) in
pa_core, so that this information can be used by modules at init time to
figure out what optimisations may be used.
This commit is contained in:
Arun Raghavan 2010-09-14 15:21:49 +05:30
parent ffcf3c8a6c
commit ab4223e9cf
8 changed files with 119 additions and 55 deletions
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39
src/pulsecore/cpu-arm.c
View file

@ -80,12 +80,11 @@ static char *get_cpuinfo(void) {
}
#endif /* defined (__arm__) && defined (__linux__) */
void pa_cpu_init_arm (void) {
pa_bool_t pa_cpu_init_arm (pa_cpu_arm_flag_t *flags) {
#if defined (__arm__)
#if defined (__linux__)
char *cpuinfo, *line;
int arch;
pa_cpu_arm_flag_t flags = 0;
/* We need to read the CPU flags from /proc/cpuinfo because there is no user
* space support to get the CPU features. This only works on linux AFAIK. */
@ -94,13 +93,15 @@ void pa_cpu_init_arm (void) {
return;
}
*flags = 0;
/* get the CPU architecture */
if ((line = get_cpuinfo_line (cpuinfo, "CPU architecture"))) {
arch = strtoul (line, NULL, 0);
if (arch >= 6)
flags |= PA_CPU_ARM_V6;
*flags |= PA_CPU_ARM_V6;
if (arch >= 7)
flags |= PA_CPU_ARM_V7;
*flags |= PA_CPU_ARM_V7;
pa_xfree(line);
}
@ -111,13 +112,13 @@ void pa_cpu_init_arm (void) {
while ((current = pa_split_spaces (line, &state))) {
if (!strcmp (current, "vfp"))
flags |= PA_CPU_ARM_VFP;
*flags |= PA_CPU_ARM_VFP;
else if (!strcmp (current, "edsp"))
flags |= PA_CPU_ARM_EDSP;
*flags |= PA_CPU_ARM_EDSP;
else if (!strcmp (current, "neon"))
flags |= PA_CPU_ARM_NEON;
*flags |= PA_CPU_ARM_NEON;
else if (!strcmp (current, "vfpv3"))
flags |= PA_CPU_ARM_VFPV3;
*flags |= PA_CPU_ARM_VFPV3;
pa_xfree(current);
}
@ -125,17 +126,23 @@ void pa_cpu_init_arm (void) {
pa_xfree(cpuinfo);
pa_log_info ("CPU flags: %s%s%s%s%s%s",
(flags & PA_CPU_ARM_V6) ? "V6 " : "",
(flags & PA_CPU_ARM_V7) ? "V7 " : "",
(flags & PA_CPU_ARM_VFP) ? "VFP " : "",
(flags & PA_CPU_ARM_EDSP) ? "EDSP " : "",
(flags & PA_CPU_ARM_NEON) ? "NEON " : "",
(flags & PA_CPU_ARM_VFPV3) ? "VFPV3 " : "");
(*flags & PA_CPU_ARM_V6) ? "V6 " : "",
(*flags & PA_CPU_ARM_V7) ? "V7 " : "",
(*flags & PA_CPU_ARM_VFP) ? "VFP " : "",
(*flags & PA_CPU_ARM_EDSP) ? "EDSP " : "",
(*flags & PA_CPU_ARM_NEON) ? "NEON " : "",
(*flags & PA_CPU_ARM_VFPV3) ? "VFPV3 " : "");
if (*flags & PA_CPU_ARM_V6)
pa_volume_func_init_arm (*flags);
return TRUE;
#else /* defined (__linux__) */
pa_log ("ARM cpu features not yet supported on this OS");
#endif /* defined (__linux__) */
if (flags & PA_CPU_ARM_V6)
pa_volume_func_init_arm (flags);
#else /* defined (__arm__) */
return FALSE;
#endif /* defined (__arm__) */
}