[coreboot-gerrit] Change in coreboot[master]: cpu/intel/common: Report the CPU max speed in SMBIOS

[Patrick Rudolph (Code Review)]

Patrick Rudolph has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/43903 )

Change subject: cpu/intel/common: Report the CPU max speed in SMBIOS
......................................................................

cpu/intel/common: Report the CPU max speed in SMBIOS

Use the TSC frequency to provide the maximum processor speed in
SMBIOS tables type 4. The TSC frequency is the "Maximum Non-Turbo Ratio"
or "Scaleable Bus Speed" on older platforms, times the FSB.

Change-Id: I8030187d2c9714c7f6c9451fd2318b3c6608e431
Signed-off-by: Patrick Rudolph 
---
M src/cpu/intel/common/fsb.c
1 file changed, 15 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/03/43903/1

diff --git a/src/cpu/intel/common/fsb.c b/src/cpu/intel/common/fsb.c
index 7772171..df2e51c 100644
--- a/src/cpu/intel/common/fsb.c
+++ b/src/cpu/intel/common/fsb.c
@@ -7,6 +7,7 @@
 #include <console/console.h>
 #include <commonlib/helpers.h>
 #include <delay.h>
+#include <smbios.h>

static u32 timer_fsb;
 static u32 timer_tsc;
@@ -137,3 +138,17 @@
    printk(BIOS_ERR, "FSB not supported or not found\n");
    return -1;
 }
+
+#if CONFIG(GENERATE_SMBIOS_TABLES)
+unsigned int smbios_cpu_get_max_speed_mhz(void)
+{
+	int ret, fsb, ratio;
+
+	/* Return the Maximum Non-Turbo Ratio (R/O) */
+	ret = get_fsb_tsc(&fsb, &ratio);
+	if (ret == 0)
+		return fsb * ratio;
+
+	return 0;
+}
+#endif