[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>
diff --git a/arch/i386/boot/main.c b/arch/i386/boot/main.c
index 7f01f96..0eeef39 100644
--- a/arch/i386/boot/main.c
+++ b/arch/i386/boot/main.c
@@ -73,15 +73,15 @@
}
/*
- * 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 @@
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 211f3f9..b91b017 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 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 d13d1e6..ef2003e 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 0000000..338857e
--- /dev/null
+++ b/include/asm-x86_64/ist.h
@@ -0,0 +1 @@
+#include <asm-i386/ist.h>