Timothy Pearson (tpearson(a)raptorengineeringinc.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/12834
-gerrit
commit fdaae1a5089ee6dcaad6d3ef38c971752fa37423
Author: Timothy Pearson <tpearson(a)raptorengineeringinc.com>
Date: Tue Jan 5 11:00:49 2016 -0600
cpu/amd/fam10h-15h: Add tsc_freq_mhz() function
The AMD Family 10h/15h processors use a TSC that increments at
the P0 core frequency. Allow coreboot to query the TSC frequency.
Change-Id: I73ead4fd4af18991452d59985b667a54689778cd
Signed-off-by: Timothy Pearson <tpearson(a)raptorengineeringinc.com>
---
src/cpu/amd/family_10h-family_15h/Makefile.inc | 1 +
src/cpu/amd/family_10h-family_15h/tsc_freq.c | 31 ++++++++++++++++++++++++++
2 files changed, 32 insertions(+)
diff --git a/src/cpu/amd/family_10h-family_15h/Makefile.inc b/src/cpu/amd/family_10h-family_15h/Makefile.inc
index 6cd2513..2e93f5c 100644
--- a/src/cpu/amd/family_10h-family_15h/Makefile.inc
+++ b/src/cpu/amd/family_10h-family_15h/Makefile.inc
@@ -3,6 +3,7 @@ ramstage-y += model_10xxx_init.c
ramstage-y += processor_name.c
romstage-y += update_microcode.c
+romstage-y += tsc_freq.c
romstage-y += ram_calc.c
ramstage-y += ram_calc.c
ramstage-y += monotonic_timer.c
diff --git a/src/cpu/amd/family_10h-family_15h/tsc_freq.c b/src/cpu/amd/family_10h-family_15h/tsc_freq.c
new file mode 100644
index 0000000..78acec1
--- /dev/null
+++ b/src/cpu/amd/family_10h-family_15h/tsc_freq.c
@@ -0,0 +1,31 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 Raptor Engineering
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <stdint.h>
+#include <cpu/x86/msr.h>
+#include <cpu/x86/tsc.h>
+
+unsigned long tsc_freq_mhz(void)
+{
+ msr_t msr;
+ uint8_t cpufid;
+ uint8_t cpudid;
+
+ msr = rdmsr(0xc0010064);
+ cpufid = (msr.lo & 0x3f);
+ cpudid = (msr.lo & 0x1c0) >> 6;
+
+ return (100 * (cpufid + 0x10)) / (0x01 << cpudid);
+}
Timothy Pearson (tpearson(a)raptorengineeringinc.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/12834
-gerrit
commit 8c53346812e1177c9aea9155433748e69788fdc2
Author: Timothy Pearson <tpearson(a)raptorengineeringinc.com>
Date: Tue Jan 5 11:00:49 2016 -0600
cpu/amd/fam10h-15h: Add tsc_freq_mhz() function
The AMD Family 10h/15h processors use a TSC that increments at
the P0 core frequency. Allow coreboot to query the TSC frequency.
Change-Id: I73ead4fd4af18991452d59985b667a54689778cd
Signed-off-by: Timothy Pearson <tpearson(a)raptorengineeringinc.com>
---
src/cpu/amd/family_10h-family_15h/Makefile.inc | 1 +
src/cpu/amd/family_10h-family_15h/tsc_freq.c | 31 ++++++++++++++++++++++++++
2 files changed, 32 insertions(+)
diff --git a/src/cpu/amd/family_10h-family_15h/Makefile.inc b/src/cpu/amd/family_10h-family_15h/Makefile.inc
index 6cd2513..0f31b79 100644
--- a/src/cpu/amd/family_10h-family_15h/Makefile.inc
+++ b/src/cpu/amd/family_10h-family_15h/Makefile.inc
@@ -5,6 +5,7 @@ ramstage-y += processor_name.c
romstage-y += update_microcode.c
romstage-y += ram_calc.c
ramstage-y += ram_calc.c
+ramstage-y += tsc_freq.c
ramstage-y += monotonic_timer.c
ramstage-$(CONFIG_HAVE_ACPI_TABLES) += powernow_acpi.c
diff --git a/src/cpu/amd/family_10h-family_15h/tsc_freq.c b/src/cpu/amd/family_10h-family_15h/tsc_freq.c
new file mode 100644
index 0000000..78acec1
--- /dev/null
+++ b/src/cpu/amd/family_10h-family_15h/tsc_freq.c
@@ -0,0 +1,31 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 Raptor Engineering
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <stdint.h>
+#include <cpu/x86/msr.h>
+#include <cpu/x86/tsc.h>
+
+unsigned long tsc_freq_mhz(void)
+{
+ msr_t msr;
+ uint8_t cpufid;
+ uint8_t cpudid;
+
+ msr = rdmsr(0xc0010064);
+ cpufid = (msr.lo & 0x3f);
+ cpudid = (msr.lo & 0x1c0) >> 6;
+
+ return (100 * (cpufid + 0x10)) / (0x01 << cpudid);
+}
Timothy Pearson (tpearson(a)raptorengineeringinc.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/12834
-gerrit
commit 15aa2536f51808faece445b0c19955fd0d128fae
Author: Timothy Pearson <tpearson(a)raptorengineeringinc.com>
Date: Tue Jan 5 11:00:49 2016 -0600
cpu/amd/fam10h-15h: Add tsc_freq_mhz() function
The AMD Family 10h/15h processors use a TSC that increments at
the P0 core frequency. Allow coreboot to query the TSC frequency.
Change-Id: I73ead4fd4af18991452d59985b667a54689778cd
Signed-off-by: Timothy Pearson <tpearson(a)raptorengineeringinc.com>
---
src/cpu/amd/family_10h-family_15h/Makefile.inc | 1 +
src/cpu/amd/family_10h-family_15h/tsc_freq.c | 31 ++++++++++++++++++++++++++
2 files changed, 32 insertions(+)
diff --git a/src/cpu/amd/family_10h-family_15h/Makefile.inc b/src/cpu/amd/family_10h-family_15h/Makefile.inc
index 6cd2513..0f31b79 100644
--- a/src/cpu/amd/family_10h-family_15h/Makefile.inc
+++ b/src/cpu/amd/family_10h-family_15h/Makefile.inc
@@ -5,6 +5,7 @@ ramstage-y += processor_name.c
romstage-y += update_microcode.c
romstage-y += ram_calc.c
ramstage-y += ram_calc.c
+ramstage-y += tsc_freq.c
ramstage-y += monotonic_timer.c
ramstage-$(CONFIG_HAVE_ACPI_TABLES) += powernow_acpi.c
diff --git a/src/cpu/amd/family_10h-family_15h/tsc_freq.c b/src/cpu/amd/family_10h-family_15h/tsc_freq.c
new file mode 100644
index 0000000..2bd6368
--- /dev/null
+++ b/src/cpu/amd/family_10h-family_15h/tsc_freq.c
@@ -0,0 +1,31 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2015 Raptor Engineeirng
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <stdint.h>
+#include <cpu/x86/msr.h>
+#include <cpu/x86/tsc.h>
+
+unsigned long tsc_freq_mhz(void)
+{
+ msr_t msr;
+ uint8_t cpufid;
+ uint8_t cpudid;
+
+ msr = rdmsr(0xc0010064);
+ cpufid = (msr.lo & 0x3f);
+ cpudid = (msr.lo & 0x1c0) >> 6;
+
+ return (100 * (cpufid + 0x10)) / (0x01 << cpudid);
+}