[patch 7/7] s390: diag 0x308 reipl.
From: Volker Sameske <[email protected]>
Add code to support the re-IPL method using diagnose 0x308.
Signed-off-by: Martin Schwidefsky <[email protected]>
diffstat:
arch/s390/kernel/Makefile | 2 +-
arch/s390/kernel/reipl_diag.c | 39 +++++++++++++++++++++++++++++++++++++++
arch/s390/kernel/setup.c | 3 +++
arch/s390/kernel/smp.c | 3 +++
4 files changed, 46 insertions(+), 1 deletion(-)
diff -urpN linux-2.6/arch/s390/kernel/Makefile linux-2.6-patched/arch/s390/kernel/Makefile
--- linux-2.6/arch/s390/kernel/Makefile 2005-08-29 01:41:01.000000000 +0200
+++ linux-2.6-patched/arch/s390/kernel/Makefile 2005-09-14 16:48:19.000000000 +0200
@@ -6,7 +6,7 @@ EXTRA_AFLAGS := -traditional
obj-y := bitmap.o traps.o time.o process.o \
setup.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o \
- semaphore.o s390_ext.o debug.o profile.o irq.o
+ semaphore.o s390_ext.o debug.o profile.o irq.o reipl_diag.o
extra-$(CONFIG_ARCH_S390_31) += head.o
extra-$(CONFIG_ARCH_S390X) += head64.o
diff -urpN linux-2.6/arch/s390/kernel/reipl_diag.c linux-2.6-patched/arch/s390/kernel/reipl_diag.c
--- linux-2.6/arch/s390/kernel/reipl_diag.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6-patched/arch/s390/kernel/reipl_diag.c 2005-09-14 16:48:19.000000000 +0200
@@ -0,0 +1,39 @@
+/*
+ * This file contains the implementation of the
+ * Linux re-IPL support
+ *
+ * (C) Copyright IBM Corp. 2005
+ *
+ * Author(s): Volker Sameske ([email protected])
+ *
+ */
+
+#include <linux/kernel.h>
+
+static unsigned int reipl_diag_rc1;
+static unsigned int reipl_diag_rc2;
+
+/*
+ * re-IPL the system using the last used IPL parameters
+ */
+void reipl_diag(void)
+{
+ asm volatile (
+ " la %%r4,0\n"
+ " la %%r5,0\n"
+ " diag %%r4,%2,0x308\n"
+ "0:\n"
+ " st %%r4,%0\n"
+ " st %%r5,%1\n"
+ ".section __ex_table,\"a\"\n"
+#ifdef __s390x__
+ " .align 8\n"
+ " .quad 0b, 0b\n"
+#else
+ " .align 4\n"
+ " .long 0b, 0b\n"
+#endif
+ ".previous\n"
+ : "=m" (reipl_diag_rc1), "=m" (reipl_diag_rc2)
+ : "d" (3) : "cc", "4", "5" );
+}
diff -urpN linux-2.6/arch/s390/kernel/setup.c linux-2.6-patched/arch/s390/kernel/setup.c
--- linux-2.6/arch/s390/kernel/setup.c 2005-09-14 16:48:19.000000000 +0200
+++ linux-2.6-patched/arch/s390/kernel/setup.c 2005-09-14 16:48:19.000000000 +0200
@@ -261,8 +261,11 @@ void (*_machine_power_off)(void) = machi
* Reboot, halt and power_off routines for non SMP.
*/
extern void reipl(unsigned long devno);
+extern void reipl_diag(void);
static void do_machine_restart_nonsmp(char * __unused)
{
+ reipl_diag();
+
if (MACHINE_IS_VM)
cpcmd ("IPL", NULL, 0);
else
diff -urpN linux-2.6/arch/s390/kernel/smp.c linux-2.6-patched/arch/s390/kernel/smp.c
--- linux-2.6/arch/s390/kernel/smp.c 2005-08-29 01:41:01.000000000 +0200
+++ linux-2.6-patched/arch/s390/kernel/smp.c 2005-09-14 16:48:19.000000000 +0200
@@ -65,6 +65,7 @@ extern char vmhalt_cmd[];
extern char vmpoff_cmd[];
extern void reipl(unsigned long devno);
+extern void reipl_diag(void);
static void smp_ext_bitcall(int, ec_bit_sig);
static void smp_ext_bitcall_others(ec_bit_sig);
@@ -283,6 +284,8 @@ static void do_machine_restart(void * __
* interrupted by an external interrupt and s390irq
* locks are always held disabled).
*/
+ reipl_diag();
+
if (MACHINE_IS_VM)
cpcmd ("IPL", NULL, 0, NULL);
else
-
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