Date: Thu, 12 Dec 2013 12:29:35 +0000 (UTC) From: Andreas Tobler <andreast@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r259256 - stable/10/sys/powerpc/powerpc Message-ID: <201312121229.rBCCTZSY094367@svn.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: andreast Date: Thu Dec 12 12:29:35 2013 New Revision: 259256 URL: http://svnweb.freebsd.org/changeset/base/259256 Log: MFC: r258722, r258757 r258722: Give some output about the CPU clock on IBMPOWER machines, currently read from OF. Linux does it similar, means they also read the OF values and display them. r258757: Use the Open Firmware-based CPU frequency determination as a generic fallback if we can't measure CPU frequency. This is also useful on a variety of embedded systems using FDT. Modified: stable/10/sys/powerpc/powerpc/cpu.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/powerpc/powerpc/cpu.c ============================================================================== --- stable/10/sys/powerpc/powerpc/cpu.c Thu Dec 12 12:17:20 2013 (r259255) +++ stable/10/sys/powerpc/powerpc/cpu.c Thu Dec 12 12:29:35 2013 (r259256) @@ -74,6 +74,8 @@ #include <machine/smp.h> #include <machine/spr.h> +#include <dev/ofw/openfirm.h> + static void cpu_6xx_setup(int cpuid, uint16_t vers); static void cpu_970_setup(int cpuid, uint16_t vers); static void cpu_booke_setup(int cpuid, uint16_t vers); @@ -273,6 +275,9 @@ cpu_est_clockrate(int cpu_id, uint64_t * { uint16_t vers; register_t msr; + phandle_t cpu, dev, root; + int res = 0; + char buf[8]; vers = mfpvr() >> 16; msr = mfmsr(); @@ -316,9 +321,40 @@ cpu_est_clockrate(int cpu_id, uint64_t * mtmsr(msr); return (0); + + default: + root = OF_peer(0); + if (root == 0) + return (ENXIO); + + dev = OF_child(root); + while (dev != 0) { + res = OF_getprop(dev, "name", buf, sizeof(buf)); + if (res > 0 && strcmp(buf, "cpus") == 0) + break; + dev = OF_peer(dev); + } + cpu = OF_child(dev); + while (cpu != 0) { + res = OF_getprop(cpu, "device_type", buf, + sizeof(buf)); + if (res > 0 && strcmp(buf, "cpu") == 0) + break; + cpu = OF_peer(cpu); + } + if (cpu == 0) + return (ENOENT); + if (OF_getprop(cpu, "ibm,extended-clock-frequency", + cps, sizeof(*cps)) >= 0) { + return (0); + } else if (OF_getprop(cpu, "clock-frequency", cps, + sizeof(cell_t)) >= 0) { + *cps >>= 32; + return (0); + } else { + return (ENOENT); + } } - - return (ENXIO); } void
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201312121229.rBCCTZSY094367>