[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>

4 files changed, 18 insertions, 14 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)
diff --git a/include/asm-i386/bootparam.h b/include/asm-i386/bootparam.h
index 211f3f972a57..b91b01783e4b 100644
--- a/include/asm-i386/bootparam.h
+++ b/include/asm-i386/bootparam.h
@@ -4,8 +4,9 @@
 #include <linux/types.h>
 #include <linux/screen_info.h>
 #include <linux/apm_bios.h>
-#include <asm/e820.h>
 #include <linux/edd.h>
+#include <asm/e820.h>
+#include <asm/ist.h>
 #include <video/edid.h>
 
 struct setup_header {
@@ -59,7 +60,7 @@ struct boot_params {
         struct screen_info screen_info;                 /* 0x000 */
         struct apm_bios_info apm_bios_info;             /* 0x040 */
         u8  _pad2[12];                                  /* 0x054 */
-        u32 speedstep_info[4];                          /* 0x060 */
+        struct ist_info ist_info;                       /* 0x060 */
         u8  _pad3[16];                                  /* 0x070 */
         u8  hd0_info[16];       /* obsolete! */         /* 0x080 */
         u8  hd1_info[16];       /* obsolete! */         /* 0x090 */
diff --git a/include/asm-i386/ist.h b/include/asm-i386/ist.h
index d13d1e68afa9..ef2003ebc6f9 100644
--- a/include/asm-i386/ist.h
+++ b/include/asm-i386/ist.h
@@ -19,11 +19,13 @@
 
 #ifdef __KERNEL__
 
+#include <linux/types.h>
+
 struct ist_info {
-        unsigned long   signature;
-        unsigned long   command;
-        unsigned long   event;
-        unsigned long   perf_level;
+        u32 signature;
+        u32 command;
+        u32 event;
+        u32 perf_level;
 };
 
 extern struct ist_info ist_info;
diff --git a/include/asm-x86_64/ist.h b/include/asm-x86_64/ist.h
new file mode 100644
index 000000000000..338857ecbc68
--- /dev/null
+++ b/include/asm-x86_64/ist.h
@@ -0,0 +1 @@
+#include <asm-i386/ist.h>