[x86 setup] Make struct ist_info cross-architecture, and use in setup code

Make "struct ist_info" valid on both i386 and x86-64, and use the
structure by name in the setup code.  Additionally, "Intel SpeedStep
IST" is redundant, refer to it as IST consistently.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

1 files changed, 8 insertions, 8 deletions

diff --git a/arch/i386/boot/main.c b/arch/i386/boot/main.c
index 7f01f96c4fb8..0eeef3989a17 100644
--- a/arch/i386/boot/main.c
+++ b/arch/i386/boot/main.c
@@ -73,15 +73,15 @@ static void keyboard_set_repeat(void)
 }
 
 /*
- * Get Intel SpeedStep IST information.
+ * Get Intel SpeedStep (IST) information.
  */
-static void query_speedstep_ist(void)
+static void query_ist(void)
 {
         asm("int $0x15"
-            : "=a" (boot_params.speedstep_info[0]),
-              "=b" (boot_params.speedstep_info[1]),
-              "=c" (boot_params.speedstep_info[2]),
-              "=d" (boot_params.speedstep_info[3])
+            : "=a" (boot_params.ist_info.signature),
+              "=b" (boot_params.ist_info.command),
+              "=c" (boot_params.ist_info.event),
+              "=d" (boot_params.ist_info.perf_level)
             : "a" (0x0000e980),  /* IST Support */
               "d" (0x47534943)); /* Request value */
 }
@@ -144,8 +144,8 @@ void main(void)
         query_voyager();
 #endif
 
-        /* Query SpeedStep IST information */
-        query_speedstep_ist();
+        /* Query Intel SpeedStep (IST) information */
+        query_ist();
 
         /* Query APM information */
 #if defined(CONFIG_APM) || defined(CONFIG_APM_MODULE)