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path: root/drivers/s390/char/sclp.h
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Diffstat (limited to 'drivers/s390/char/sclp.h')
-rw-r--r--drivers/s390/char/sclp.h40
1 files changed, 39 insertions, 1 deletions
diff --git a/drivers/s390/char/sclp.h b/drivers/s390/char/sclp.h
index e1fc7eb043d6..53b5d1b9761a 100644
--- a/drivers/s390/char/sclp.h
+++ b/drivers/s390/char/sclp.h
@@ -204,19 +204,57 @@ void sclp_unregister(struct sclp_register *reg);
int sclp_remove_processed(struct sccb_header *sccb);
int sclp_deactivate(void);
int sclp_reactivate(void);
-int sclp_service_call(sclp_cmdw_t command, void *sccb);
int sclp_sync_request(sclp_cmdw_t command, void *sccb);
int sclp_sync_request_timeout(sclp_cmdw_t command, void *sccb, int timeout);
int sclp_sdias_init(void);
void sclp_sdias_exit(void);
+enum {
+ sclp_init_state_uninitialized,
+ sclp_init_state_initializing,
+ sclp_init_state_initialized
+};
+
+extern int sclp_init_state;
extern int sclp_console_pages;
extern int sclp_console_drop;
extern unsigned long sclp_console_full;
+extern char sclp_early_sccb[PAGE_SIZE];
+
+void sclp_early_wait_irq(void);
+int sclp_early_cmd(sclp_cmdw_t cmd, void *sccb);
+unsigned int sclp_early_con_check_linemode(struct init_sccb *sccb);
+int sclp_early_set_event_mask(struct init_sccb *sccb,
+ unsigned long receive_mask,
+ unsigned long send_mask);
+
/* useful inlines */
+/* Perform service call. Return 0 on success, non-zero otherwise. */
+static inline int sclp_service_call(sclp_cmdw_t command, void *sccb)
+{
+ int cc = 4; /* Initialize for program check handling */
+
+ asm volatile(
+ "0: .insn rre,0xb2200000,%1,%2\n" /* servc %1,%2 */
+ "1: ipm %0\n"
+ " srl %0,28\n"
+ "2:\n"
+ EX_TABLE(0b, 2b)
+ EX_TABLE(1b, 2b)
+ : "+&d" (cc) : "d" (command), "a" ((unsigned long)sccb)
+ : "cc", "memory");
+ if (cc == 4)
+ return -EINVAL;
+ if (cc == 3)
+ return -EIO;
+ if (cc == 2)
+ return -EBUSY;
+ return 0;
+}
+
/* VM uses EBCDIC 037, LPAR+native(SE+HMC) use EBCDIC 500 */
/* translate single character from ASCII to EBCDIC */
static inline unsigned char