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authorCollin L. Walling <walling@linux.vnet.ibm.com>2018-02-23 10:43:13 -0500
committerThomas Huth <thuth@redhat.com>2018-02-26 07:56:55 +0100
commit9eaa654ab327b54901f398440258be766c327953 (patch)
treec5392d15764be50c244c9732987d2ad490b08f77 /pc-bios
parent26b2a2a49171ff44286722681f5aebdfee23e9cf (diff)
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s390-ccw: set up interactive boot menu parameters
Reads boot menu flag and timeout values from the iplb and sets the respective fields for the menu. Signed-off-by: Collin L. Walling <walling@linux.vnet.ibm.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Thomas Huth <thuth@redhat.com>
Diffstat (limited to 'pc-bios')
-rw-r--r--pc-bios/s390-ccw/Makefile2
-rw-r--r--pc-bios/s390-ccw/main.c24
-rw-r--r--pc-bios/s390-ccw/menu.c22
-rw-r--r--pc-bios/s390-ccw/s390-ccw.h3
4 files changed, 50 insertions, 1 deletions
diff --git a/pc-bios/s390-ccw/Makefile b/pc-bios/s390-ccw/Makefile
index 9f7904f..1712c2d 100644
--- a/pc-bios/s390-ccw/Makefile
+++ b/pc-bios/s390-ccw/Makefile
@@ -9,7 +9,7 @@ $(call set-vpath, $(SRC_PATH)/pc-bios/s390-ccw)
.PHONY : all clean build-all
-OBJECTS = start.o main.o bootmap.o sclp.o virtio.o virtio-scsi.o virtio-blkdev.o libc.o
+OBJECTS = start.o main.o bootmap.o sclp.o virtio.o virtio-scsi.o virtio-blkdev.o libc.o menu.o
QEMU_CFLAGS := $(filter -W%, $(QEMU_CFLAGS))
QEMU_CFLAGS += -ffreestanding -fno-delete-null-pointer-checks -msoft-float
QEMU_CFLAGS += -march=z900 -fPIE -fno-strict-aliasing
diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
index e41b264..32ed70e 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -18,6 +18,9 @@ IplParameterBlock iplb __attribute__((__aligned__(PAGE_SIZE)));
static char loadparm[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
QemuIplParameters qipl;
+#define LOADPARM_PROMPT "PROMPT "
+#define LOADPARM_EMPTY "........"
+
/*
* Priniciples of Operations (SA22-7832-09) chapter 17 requires that
* a subsystem-identification is at 184-187 and bytes 188-191 are zero
@@ -74,6 +77,26 @@ static bool find_dev(Schib *schib, int dev_no)
return false;
}
+static void menu_setup(void)
+{
+ if (memcmp(loadparm, LOADPARM_PROMPT, 8) == 0) {
+ menu_set_parms(QIPL_FLAG_BM_OPTS_CMD, 0);
+ return;
+ }
+
+ /* If loadparm was set to any other value, then do not enable menu */
+ if (memcmp(loadparm, LOADPARM_EMPTY, 8) != 0) {
+ return;
+ }
+
+ switch (iplb.pbt) {
+ case S390_IPL_TYPE_CCW:
+ menu_set_parms(qipl.qipl_flags & QIPL_FLAG_BM_OPTS_CMD,
+ qipl.boot_menu_timeout);
+ return;
+ }
+}
+
static void virtio_setup(void)
{
Schib schib;
@@ -117,6 +140,7 @@ static void virtio_setup(void)
default:
panic("List-directed IPL not supported yet!\n");
}
+ menu_setup();
} else {
for (ssid = 0; ssid < 0x3; ssid++) {
blk_schid.ssid = ssid;
diff --git a/pc-bios/s390-ccw/menu.c b/pc-bios/s390-ccw/menu.c
new file mode 100644
index 0000000..1ce33dd
--- /dev/null
+++ b/pc-bios/s390-ccw/menu.c
@@ -0,0 +1,22 @@
+/*
+ * QEMU S390 Interactive Boot Menu
+ *
+ * Copyright 2018 IBM Corp.
+ * Author: Collin L. Walling <walling@linux.vnet.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+#include "libc.h"
+#include "s390-ccw.h"
+
+static uint8_t flag;
+static uint64_t timeout;
+
+void menu_set_parms(uint8_t boot_menu_flag, uint32_t boot_menu_timeout)
+{
+ flag = boot_menu_flag;
+ timeout = boot_menu_timeout;
+}
diff --git a/pc-bios/s390-ccw/s390-ccw.h b/pc-bios/s390-ccw/s390-ccw.h
index 25d4d21..6cfd4b2 100644
--- a/pc-bios/s390-ccw/s390-ccw.h
+++ b/pc-bios/s390-ccw/s390-ccw.h
@@ -84,6 +84,9 @@ ulong get_second(void);
/* bootmap.c */
void zipl_load(void);
+/* menu.c */
+void menu_set_parms(uint8_t boot_menu_flag, uint32_t boot_menu_timeout);
+
static inline void fill_hex(char *out, unsigned char val)
{
const char hex[] = "0123456789abcdef";