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-rw-r--r--pc-bios/s390-ccw/bootmap.c94
-rw-r--r--pc-bios/s390-ccw/bootmap.h23
-rw-r--r--pc-bios/s390-ccw/menu.c10
-rw-r--r--pc-bios/s390-ccw/s390-ccw.h2
4 files changed, 122 insertions, 7 deletions
diff --git a/pc-bios/s390-ccw/bootmap.c b/pc-bios/s390-ccw/bootmap.c
index 092fb355fe..ae93b552c9 100644
--- a/pc-bios/s390-ccw/bootmap.c
+++ b/pc-bios/s390-ccw/bootmap.c
@@ -83,6 +83,10 @@ static void jump_to_IPL_code(uint64_t address)
static unsigned char _bprs[8*1024]; /* guessed "max" ECKD sector size */
static const int max_bprs_entries = sizeof(_bprs) / sizeof(ExtEckdBlockPtr);
+static uint8_t _s2[MAX_SECTOR_SIZE * 3] __attribute__((__aligned__(PAGE_SIZE)));
+static void *s2_prev_blk = _s2;
+static void *s2_cur_blk = _s2 + MAX_SECTOR_SIZE;
+static void *s2_next_blk = _s2 + MAX_SECTOR_SIZE * 2;
static inline void verify_boot_info(BootInfo *bip)
{
@@ -182,7 +186,77 @@ static block_number_t load_eckd_segments(block_number_t blk, uint64_t *address)
return block_nr;
}
-static void run_eckd_boot_script(block_number_t bmt_block_nr)
+static bool find_zipl_boot_menu_banner(int *offset)
+{
+ int i;
+
+ /* Menu banner starts with "zIPL" */
+ for (i = 0; i < virtio_get_block_size() - 4; i++) {
+ if (magic_match(s2_cur_blk + i, ZIPL_MAGIC_EBCDIC)) {
+ *offset = i;
+ return true;
+ }
+ }
+
+ return false;
+}
+
+static int eckd_get_boot_menu_index(block_number_t s1b_block_nr)
+{
+ block_number_t cur_block_nr;
+ block_number_t prev_block_nr = 0;
+ block_number_t next_block_nr = 0;
+ EckdStage1b *s1b = (void *)sec;
+ int banner_offset;
+ int i;
+
+ /* Get Stage1b data */
+ memset(sec, FREE_SPACE_FILLER, sizeof(sec));
+ read_block(s1b_block_nr, s1b, "Cannot read stage1b boot loader");
+
+ memset(_s2, FREE_SPACE_FILLER, sizeof(_s2));
+
+ /* Get Stage2 data */
+ for (i = 0; i < STAGE2_BLK_CNT_MAX; i++) {
+ cur_block_nr = eckd_block_num(&s1b->seek[i].chs);
+
+ if (!cur_block_nr) {
+ break;
+ }
+
+ read_block(cur_block_nr, s2_cur_blk, "Cannot read stage2 boot loader");
+
+ if (find_zipl_boot_menu_banner(&banner_offset)) {
+ /*
+ * Load the adjacent blocks to account for the
+ * possibility of menu data spanning multiple blocks.
+ */
+ if (prev_block_nr) {
+ read_block(prev_block_nr, s2_prev_blk,
+ "Cannot read stage2 boot loader");
+ }
+
+ if (i + 1 < STAGE2_BLK_CNT_MAX) {
+ next_block_nr = eckd_block_num(&s1b->seek[i + 1].chs);
+ }
+
+ if (next_block_nr) {
+ read_block(next_block_nr, s2_next_blk,
+ "Cannot read stage2 boot loader");
+ }
+
+ return menu_get_zipl_boot_index(s2_cur_blk + banner_offset);
+ }
+
+ prev_block_nr = cur_block_nr;
+ }
+
+ sclp_print("No zipl boot menu data found. Booting default entry.");
+ return 0;
+}
+
+static void run_eckd_boot_script(block_number_t bmt_block_nr,
+ block_number_t s1b_block_nr)
{
int i;
unsigned int loadparm = get_loadparm_index();
@@ -191,6 +265,10 @@ static void run_eckd_boot_script(block_number_t bmt_block_nr)
BootMapTable *bmt = (void *)sec;
BootMapScript *bms = (void *)sec;
+ if (menu_is_enabled_zipl()) {
+ loadparm = eckd_get_boot_menu_index(s1b_block_nr);
+ }
+
debug_print_int("loadparm", loadparm);
IPL_assert(loadparm <= MAX_TABLE_ENTRIES, "loadparm value greater than"
" maximum number of boot entries allowed");
@@ -223,7 +301,7 @@ static void ipl_eckd_cdl(void)
XEckdMbr *mbr;
EckdCdlIpl2 *ipl2 = (void *)sec;
IplVolumeLabel *vlbl = (void *)sec;
- block_number_t bmt_block_nr;
+ block_number_t bmt_block_nr, s1b_block_nr;
/* we have just read the block #0 and recognized it as "IPL1" */
sclp_print("CDL\n");
@@ -241,6 +319,9 @@ static void ipl_eckd_cdl(void)
/* save pointer to Boot Map Table */
bmt_block_nr = eckd_block_num(&mbr->blockptr.xeckd.bptr.chs);
+ /* save pointer to Stage1b Data */
+ s1b_block_nr = eckd_block_num(&ipl2->stage1.seek[0].chs);
+
memset(sec, FREE_SPACE_FILLER, sizeof(sec));
read_block(2, vlbl, "Cannot read Volume Label at block 2");
IPL_assert(magic_match(vlbl->key, VOL1_MAGIC),
@@ -249,7 +330,7 @@ static void ipl_eckd_cdl(void)
"Invalid magic of volser block");
print_volser(vlbl->f.volser);
- run_eckd_boot_script(bmt_block_nr);
+ run_eckd_boot_script(bmt_block_nr, s1b_block_nr);
/* no return */
}
@@ -280,7 +361,7 @@ static void print_eckd_ldl_msg(ECKD_IPL_mode_t mode)
static void ipl_eckd_ldl(ECKD_IPL_mode_t mode)
{
- block_number_t bmt_block_nr;
+ block_number_t bmt_block_nr, s1b_block_nr;
EckdLdlIpl1 *ipl1 = (void *)sec;
if (mode != ECKD_LDL_UNLABELED) {
@@ -302,7 +383,10 @@ static void ipl_eckd_ldl(ECKD_IPL_mode_t mode)
/* save pointer to Boot Map Table */
bmt_block_nr = eckd_block_num(&ipl1->bip.bp.ipl.bm_ptr.eckd.bptr.chs);
- run_eckd_boot_script(bmt_block_nr);
+ /* save pointer to Stage1b Data */
+ s1b_block_nr = eckd_block_num(&ipl1->stage1.seek[0].chs);
+
+ run_eckd_boot_script(bmt_block_nr, s1b_block_nr);
/* no return */
}
diff --git a/pc-bios/s390-ccw/bootmap.h b/pc-bios/s390-ccw/bootmap.h
index 4cf7e1e463..c636626f1a 100644
--- a/pc-bios/s390-ccw/bootmap.h
+++ b/pc-bios/s390-ccw/bootmap.h
@@ -87,6 +87,7 @@ typedef struct ScsiMbr {
} __attribute__ ((packed)) ScsiMbr;
#define ZIPL_MAGIC "zIPL"
+#define ZIPL_MAGIC_EBCDIC "\xa9\xc9\xd7\xd3"
#define IPL1_MAGIC "\xc9\xd7\xd3\xf1" /* == "IPL1" in EBCDIC */
#define IPL2_MAGIC "\xc9\xd7\xd3\xf2" /* == "IPL2" in EBCDIC */
#define VOL1_MAGIC "\xe5\xd6\xd3\xf1" /* == "VOL1" in EBCDIC */
@@ -249,15 +250,33 @@ typedef struct EckdCdlIpl1 {
uint8_t data[24];
} __attribute__((packed)) EckdCdlIpl1;
+typedef struct EckdSeekArg {
+ uint16_t pad;
+ EckdCHS chs;
+ uint8_t pad2;
+} __attribute__ ((packed)) EckdSeekArg;
+
+typedef struct EckdStage1b {
+ uint8_t reserved[32 * STAGE2_BLK_CNT_MAX];
+ struct EckdSeekArg seek[STAGE2_BLK_CNT_MAX];
+ uint8_t unused[64];
+} __attribute__ ((packed)) EckdStage1b;
+
+typedef struct EckdStage1 {
+ uint8_t reserved[72];
+ struct EckdSeekArg seek[2];
+} __attribute__ ((packed)) EckdStage1;
+
typedef struct EckdCdlIpl2 {
uint8_t key[4]; /* == "IPL2" */
- uint8_t reserved0[88];
+ struct EckdStage1 stage1;
XEckdMbr mbr;
uint8_t reserved[24];
} __attribute__((packed)) EckdCdlIpl2;
typedef struct EckdLdlIpl1 {
- uint8_t reserved[112];
+ uint8_t reserved[24];
+ struct EckdStage1 stage1;
BootInfo bip; /* BootInfo is MBR for LDL */
} __attribute__((packed)) EckdLdlIpl1;
diff --git a/pc-bios/s390-ccw/menu.c b/pc-bios/s390-ccw/menu.c
index 1ce33ddf3d..c1d242fed1 100644
--- a/pc-bios/s390-ccw/menu.c
+++ b/pc-bios/s390-ccw/menu.c
@@ -15,8 +15,18 @@
static uint8_t flag;
static uint64_t timeout;
+int menu_get_zipl_boot_index(const char *menu_data)
+{
+ return 0; /* implemented next patch */
+}
+
void menu_set_parms(uint8_t boot_menu_flag, uint32_t boot_menu_timeout)
{
flag = boot_menu_flag;
timeout = boot_menu_timeout;
}
+
+bool menu_is_enabled_zipl(void)
+{
+ return flag & QIPL_FLAG_BM_OPTS_CMD;
+}
diff --git a/pc-bios/s390-ccw/s390-ccw.h b/pc-bios/s390-ccw/s390-ccw.h
index 6cfd4b2183..c0dd37f7ba 100644
--- a/pc-bios/s390-ccw/s390-ccw.h
+++ b/pc-bios/s390-ccw/s390-ccw.h
@@ -86,6 +86,8 @@ void zipl_load(void);
/* menu.c */
void menu_set_parms(uint8_t boot_menu_flag, uint32_t boot_menu_timeout);
+int menu_get_zipl_boot_index(const char *menu_data);
+bool menu_is_enabled_zipl(void);
static inline void fill_hex(char *out, unsigned char val)
{
generated by cgit v1.2.1 (git 2.18.0) at 2024-05-19 06:01:45 +0000