Messages in this thread Patch in this message | | | Subject | [PATCH] /proc/cpuinfo fixes for G5 | From | Benjamin Herrenschmidt <> | Date | Thu, 04 Mar 2004 10:48:34 +1100 |
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Hi !
This patch adds a "timbase" entry in /proc/cpuinfo like p/iSeries that provides the CPU timebase frequency. It is using by a all sort of performance analysis tools we are hacking in house.
It also remove a useless bit about the l2 cache that was copied over from ppc32.
Ben.
===== arch/ppc64/kernel/pmac_time.c 1.1 vs edited ===== --- 1.1/arch/ppc64/kernel/pmac_time.c Thu Feb 12 14:48:00 2004 +++ edited/arch/ppc64/kernel/pmac_time.c Thu Mar 4 10:21:01 2004 @@ -39,6 +39,8 @@ extern void setup_default_decr(void); +extern unsigned long ppc_tb_freq; + /* Apparently the RTC stores seconds since 1 Jan 1904 */ #define RTC_OFFSET 2082844800 @@ -151,6 +153,7 @@ tb_to_us = mulhwu_scale_factor(freq, 1000000); div128_by_32( 1024*1024, 0, tb_ticks_per_sec, &divres ); tb_to_xs = divres.result_low; + ppc_tb_freq = freq; setup_default_decr(); } ===== arch/ppc64/kernel/pmac_setup.c 1.5 vs edited ===== --- 1.5/arch/ppc64/kernel/pmac_setup.c Mon Mar 1 11:50:37 2004 +++ edited/arch/ppc64/kernel/pmac_setup.c Wed Mar 3 10:51:22 2004 @@ -95,6 +95,7 @@ PMAC_MB_INFO_MODEL, 0); unsigned int mbflags = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_FLAGS, 0); + extern unsigned long ppc_tb_freq; if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME, (long)&mbname) != 0) @@ -127,20 +128,11 @@ seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname); seq_printf(m, "pmac flags\t: %08x\n", mbflags); - /* Checks "l2cr-value" property in the registry */ - np = find_devices("cpus"); - if (np == 0) - np = find_type_devices("cpu"); - if (np != 0) { - unsigned int *l2cr = (unsigned int *) - get_property(np, "l2cr-value", NULL); - if (l2cr != 0) { - seq_printf(m, "l2cr override\t: 0x%x\n", *l2cr); - } - } - /* Indicate newworld */ seq_printf(m, "pmac-generation\t: NewWorld\n"); + + /* Indicate timebase value */ + seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq); }
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