#endif
#include <stdint.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <pulse/xmalloc.h>
#include <pulsecore/log.h>
#include "cpu-arm.h"
-static pa_cpu_arm_flag_t pa_cpu_arm_flags;
+#if defined (__arm__) && defined (__linux__)
+
+#define MAX_BUFFER 4096
+static char *
+get_cpuinfo_line (char *cpuinfo, const char *tag) {
+ char *line, *end, *colon;
+
+ if (!(line = strstr (cpuinfo, tag)))
+ return NULL;
+
+ if (!(end = strchr (line, '\n')))
+ return NULL;
+
+ if (!(colon = strchr (line, ':')))
+ return NULL;
+
+ if (++colon >= end)
+ return NULL;
+
+ return pa_xstrndup (colon, end - colon);
+}
+
+static char *get_cpuinfo(void) {
+ char *cpuinfo;
+ int n, fd;
+
+ if (!(cpuinfo = malloc(MAX_BUFFER)))
+ return NULL;
+
+ if ((fd = open("/proc/cpuinfo", O_RDONLY)) < 0) {
+ free (cpuinfo);
+ return NULL;
+ }
+
+ if ((n = read(fd, cpuinfo, MAX_BUFFER-1)) < 0) {
+ free (cpuinfo);
+ close (fd);
+ return NULL;
+ }
+ cpuinfo[n] = 0;
+ close (fd);
+
+ return cpuinfo;
+}
+#endif /* defined (__arm__) && defined (__linux__) */
void pa_cpu_init_arm (void) {
#if defined (__arm__)
- pa_cpu_arm_flags = 0;
-
- pa_log ("ARM init\n");
+#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. */
+ if (!(cpuinfo = get_cpuinfo ())) {
+ pa_log ("Can't read cpuinfo");
+ return;
+ }
+
+ /* 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;
+ if (arch >= 7)
+ flags |= PA_CPU_ARM_V7;
+
+ free (line);
+ }
+ /* get the CPU features */
+ if ((line = get_cpuinfo_line (cpuinfo, "Features"))) {
+ char *state = NULL, *current;
+
+ while ((current = pa_split_spaces (line, &state))) {
+ if (!strcmp (current, "vfp"))
+ flags |= PA_CPU_ARM_VFP;
+ else if (!strcmp (current, "edsp"))
+ flags |= PA_CPU_ARM_EDSP;
+ else if (!strcmp (current, "neon"))
+ flags |= PA_CPU_ARM_NEON;
+ else if (!strcmp (current, "vfpv3"))
+ flags |= PA_CPU_ARM_VFPV3;
+
+ free (current);
+ }
+ }
+ free (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 " : "");
+#else /* defined (__linux__) */
+ pa_log ("ARM cpu features not yet supported on this OS");
+#endif /* defined (__linux__) */
- pa_volume_func_init_arm (pa_cpu_arm_flags);
+ if (flags & PA_CPU_ARM_V6)
+ pa_volume_func_init_arm (flags);
#endif /* defined (__arm__) */
}