patch-2.2.14 linux/arch/s390/kernel/irq.h
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- Lines: 724
- Date:
Tue Jan 4 10:12:12 2000
- Orig file:
v2.2.13/linux/arch/s390/kernel/irq.h
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.2.13/linux/arch/s390/kernel/irq.h linux/arch/s390/kernel/irq.h
@@ -0,0 +1,723 @@
+#ifndef __irq_h
+#define __irq_h
+
+#include <asm/irq.h>
+#include <asm/hardirq.h>
+
+/*
+ * Interrupt controller descriptor. This is all we need
+ * to describe about the low-level hardware.
+ */
+struct hw_interrupt_type {
+ const char *typename;
+ int (*handle)(unsigned int irq,
+ int cpu,
+ struct pt_regs * regs);
+ int (*enable) (unsigned int irq);
+ int (*disable)(unsigned int irq);
+};
+
+
+/*
+ * Status: reason for being disabled: somebody has
+ * done a "disable_irq()" or we must not re-enter the
+ * already executing irq..
+ */
+#define IRQ_INPROGRESS 1
+#define IRQ_DISABLED 2
+#define IRQ_PENDING 4
+
+/*
+ * path management control word
+ */
+typedef struct {
+ unsigned long intparm; /* interruption parameter */
+ unsigned int res0 : 2; /* reserved zeros */
+ unsigned int isc : 3; /* interruption sublass */
+ unsigned int res5 : 3; /* reserved zeros */
+ unsigned int ena : 1; /* enabled */
+ unsigned int lm : 2; /* limit mode */
+ unsigned int mme : 2; /* measurement-mode enable */
+ unsigned int mp : 1; /* multipath mode */
+ unsigned int tf : 1; /* timing facility */
+ unsigned int dnv : 1; /* device number valid */
+ unsigned int dev : 16; /* device number */
+ unsigned char lpm; /* logical path mask */
+ unsigned char pnom; /* path not operational mask */
+ unsigned char lpum; /* last path used mask */
+ unsigned char pim; /* path installed mask */
+ unsigned short mbi; /* measurement-block index */
+ unsigned char pom; /* path operational mask */
+ unsigned char pam; /* path available mask */
+ unsigned char chpid[8]; /* CHPID 0-7 (if available) */
+ unsigned int unused1 : 8; /* reserved zeros */
+ unsigned int st : 3; /* subchannel type */
+ unsigned int unused2 : 20; /* reserved zeros */
+ unsigned int csense : 1; /* concurrent sense; can be enabled ...*/
+ /* ... per MSCH, however, if facility */
+ /* ... is not installed, this results */
+ /* ... in an operand exception. */
+ } pmcw_t;
+
+/*
+ * subchannel status word
+ */
+typedef struct {
+ unsigned int key : 4; /* subchannel key */
+ unsigned int sctl : 1; /* suspend control */
+ unsigned int eswf : 1; /* ESW format */
+ unsigned int cc : 2; /* deferred condition code */
+ unsigned int fmt : 1; /* format */
+ unsigned int pfch : 1; /* prefetch */
+ unsigned int isic : 1; /* initial-status interruption control */
+ unsigned int alcc : 1; /* address-limit checking control */
+ unsigned int ssi : 1; /* supress-suspended interruption */
+ unsigned int zcc : 1; /* zero condition code */
+ unsigned int ectl : 1; /* extended control */
+ unsigned int pno : 1; /* path not operational */
+ unsigned int res : 1; /* reserved */
+ unsigned int fctl : 3; /* function control */
+ unsigned int actl : 7; /* activity control */
+ unsigned int stctl : 5; /* status control */
+ unsigned long cpa; /* channel program address */
+ unsigned int dstat : 8; /* device status */
+ unsigned int cstat : 8; /* subchannel status */
+ unsigned int count : 16; /* residual count */
+ } scsw_t;
+
+#define SCSW_FCTL_CLEAR_FUNC 0x1
+#define SCSW_FCTL_HALT_FUNC 0x2
+#define SCSW_FCTL_START_FUNC 0x4
+
+#define SCSW_ACTL_SUSPENDED 0x1
+#define SCSW_ACTL_DEVACT 0x2
+#define SCSW_ACTL_SCHACT 0x4
+#define SCSW_ACTL_CLEAR_PEND 0x8
+#define SCSW_ACTL_HALT_PEND 0x10
+#define SCSW_ACTL_START_PEND 0x20
+#define SCSW_ACTL_RESUME_PEND 0x40
+
+#define SCSW_STCTL_STATUS_PEND 0x1
+#define SCSW_STCTL_SEC_STATUS 0x2
+#define SCSW_STCTL_PRIM_STATUS 0x4
+#define SCSW_STCTL_INTER_STATUS 0x8
+#define SCSW_STCTL_ALERT_STATUS 0x10
+
+#define DEV_STAT_ATTENTION 0x80
+#define DEV_STAT_STAT_MOD 0x40
+#define DEV_STAT_CU_END 0x20
+#define DEV_STAT_BUSY 0x10
+#define DEV_STAT_CHN_END 0x08
+#define DEV_STAT_DEV_END 0x04
+#define DEV_STAT_UNIT_CHECK 0x02
+#define DEV_STAT_UNIT_EXCEP 0x01
+
+#define SCHN_STAT_PCI 0x80
+#define SCHN_STAT_INCORR_LEN 0x40
+#define SCHN_STAT_PROG_CHECK 0x20
+#define SCHN_STAT_PROT_CHECK 0x10
+#define SCHN_STAT_CHN_DATA_CHK 0x08
+#define SCHN_STAT_CHN_CTRL_CHK 0x04
+#define SCHN_STAT_INTF_CTRL_CHK 0x02
+#define SCHN_STAT_CHAIN_CHECK 0x01
+
+/*
+ * subchannel information block
+ */
+typedef struct {
+ pmcw_t pmcw; /* path management control word */
+ scsw_t scsw; /* subchannel status word */
+ char mda[12]; /* model dependent area */
+ } schib_t;
+
+typedef struct {
+ char cmd_code;/* command code */
+ char flags; /* flags, like IDA adressing, etc. */
+ unsigned short count; /* byte count */
+ void *cda; /* data address */
+ } ccw1_t __attribute__ ((aligned(8)));
+
+#define CCW_FLAG_DC 0x80
+#define CCW_FLAG_CC 0x40
+#define CCW_FLAG_SLI 0x20
+#define CCW_FLAG_SKIP 0x10
+#define CCW_FLAG_PCI 0x08
+#define CCW_FLAG_IDA 0x04
+#define CCW_FLAG_SUSPEND 0x02
+
+#define CCW_CMD_BASIC_SENSE 0x04
+#define CCW_CMD_TIC 0x08
+#define CCW_CMD_SENSE_ID 0xE4
+#define CCW_CMD_NOOP 0x03
+#define CCW_CMD_RDC 0x64
+
+#define SENSE_MAX_COUNT 0x20
+
+/*
+ * architectured values for first sense byte
+ */
+#define SNS0_CMD_REJECT 0x80
+#define SNS_CMD_REJECT SNS0_CMD_REJECT
+#define SNS0_INTERVENTION_REQ 0x40
+#define SNS0_BUS_OUT_CHECK 0x20
+#define SNS0_EQUIPMENT_CHECK 0x10
+#define SNS0_DATA_CHECK 0x08
+#define SNS0_OVERRUN 0x04
+
+/*
+ * operation request block
+ */
+typedef struct {
+ unsigned long intparm; /* interruption parameter */
+ unsigned int key : 4; /* flags, like key, suspend control, etc. */
+ unsigned int spnd : 1; /* suspend control */
+ unsigned int res1 : 3; /* reserved */
+ unsigned int fmt : 1; /* format control */
+ unsigned int pfch : 1; /* prefetch control */
+ unsigned int isic : 1; /* initial-status-interruption control */
+ unsigned int alcc : 1; /* address-limit-checking control */
+ unsigned int ssic : 1; /* suppress-suspended-interr. control */
+ unsigned int res2 : 3; /* reserved */
+ unsigned int lpm : 8; /* logical path mask */
+ unsigned int ils : 1; /* incorrect length */
+ unsigned int zero : 7; /* reserved zeros */
+ ccw1_t *cpa; /* channel program address */
+ } __attribute__ ((packed,aligned(4))) orb_t;
+
+typedef struct {
+ unsigned int res0 : 4; /* reserved */
+ unsigned int pvrf : 1; /* path-verification-required flag */
+ unsigned int cpt : 1; /* channel-path timeout */
+ unsigned int fsavf : 1; /* Failing storage address validity flag */
+ unsigned int cons : 1; /* concurrent-sense */
+ unsigned int res8 : 2; /* reserved */
+ unsigned int scnt : 6; /* sense count if cons == 1 */
+ unsigned int res16 : 16; /* reserved */
+ } erw_t;
+
+/*
+ * subchannel logout area
+ */
+typedef struct {
+ unsigned int res0 : 1; /* reserved */
+ unsigned int esf : 7; /* extended status flags */
+ unsigned int lpum : 8; /* last path used mask */
+ unsigned int res16 : 1; /* reserved */
+ unsigned int fvf : 5; /* field-validity flags */
+ unsigned int sacc : 2; /* storage access code */
+ unsigned int termc : 2; /* termination code */
+ unsigned int devsc : 1; /* device-status check */
+ unsigned int serr : 1; /* secondary error */
+ unsigned int ioerr : 1; /* i/o-error alert */
+ unsigned int seqc : 3; /* sequence code */
+ } sublog_t ;
+
+/*
+ * Format 0 Extended Status Word (ESW)
+ */
+typedef struct {
+ sublog_t sublog; /* subchannel logout */
+ erw_t erw; /* extended report word */
+ void *faddr; /* failing address */
+ unsigned int zeros[2]; /* 2 fullwords of zeros */
+ } esw0_t;
+
+/*
+ * Format 1 Extended Status Word (ESW)
+ */
+typedef struct {
+ unsigned char zero0; /* reserved zeros */
+ unsigned char lpum; /* last path used mask */
+ unsigned short zero16; /* reserved zeros */
+ erw_t erw; /* extended report word */
+ unsigned int zeros[3]; /* 2 fullwords of zeros */
+ } esw1_t;
+
+/*
+ * Format 2 Extended Status Word (ESW)
+ */
+typedef struct {
+ unsigned char zero0; /* reserved zeros */
+ unsigned char lpum; /* last path used mask */
+ unsigned short dcti; /* device-connect-time interval */
+ erw_t erw; /* extended report word */
+ unsigned int zeros[3]; /* 2 fullwords of zeros */
+ } esw2_t;
+
+/*
+ * Format 3 Extended Status Word (ESW)
+ */
+typedef struct {
+ unsigned char zero0; /* reserved zeros */
+ unsigned char lpum; /* last path used mask */
+ unsigned short res; /* reserved */
+ erw_t erw; /* extended report word */
+ unsigned int zeros[3]; /* 2 fullwords of zeros */
+ } esw3_t;
+
+typedef union {
+ esw0_t esw0;
+ esw1_t esw1;
+ esw2_t esw2;
+ esw3_t esw3;
+ } esw_t;
+
+/*
+ * interruption response block
+ */
+typedef struct {
+ scsw_t scsw; /* subchannel status word */
+ esw_t esw; /* extended status word */
+ char ecw[32]; /* extended control word */
+ } irb_t __attribute__ ((aligned(4)));
+
+/*
+ * TPI info structure
+ */
+typedef struct {
+ unsigned int res : 16; /* reserved 0x00000001 */
+ unsigned int irq : 16; /* aka. subchannel number */
+ unsigned int intparm; /* interruption parameter */
+ } tpi_info_t;
+
+
+/*
+ * This is the "IRQ descriptor", which contains various information
+ * about the irq, including what kind of hardware handling it has,
+ * whether it is disabled etc etc.
+ *
+ * Pad this out to 32 bytes for cache and indexing reasons.
+ */
+typedef struct {
+ unsigned int status; /* IRQ status - IRQ_INPROGRESS, IRQ_DISABLED */
+ struct hw_interrupt_type *handler; /* handle/enable/disable functions */
+ struct irqaction *action; /* IRQ action list */
+ unsigned int unused[3];
+ spinlock_t irq_lock;
+ } irq_desc_t;
+
+//
+// command information word (CIW) layout
+//
+typedef struct _ciw {
+ unsigned int et : 2; // entry type
+ unsigned int reserved : 2; // reserved
+ unsigned int ct : 4; // command type
+ unsigned int cmd : 8; // command
+ unsigned int count : 16; // count
+ } ciw_t;
+
+#define CIW_TYPE_RCD 0x0 // read configuration data
+#define CIW_TYPE_SII 0x1 // set interface identifier
+#define CIW_TYPE_RNI 0x2 // read node identifier
+
+//
+// sense-id response buffer layout
+//
+typedef struct {
+ /* common part */
+ unsigned char reserved; /* always 0x'FF' */
+ unsigned short cu_type; /* control unit type */
+ unsigned char cu_model; /* control unit model */
+ unsigned short dev_type; /* device type */
+ unsigned char dev_model; /* device model */
+ unsigned char unused; /* padding byte */
+ /* extended part */
+ ciw_t ciw[62]; /* variable # of CIWs */
+ } __attribute__ ((packed,aligned(4))) senseid_t;
+
+/*
+ * sense data
+ */
+typedef struct {
+ unsigned char res[32]; /* reserved */
+ unsigned char data[32]; /* sense data */
+ } sense_t;
+
+/*
+ * device status area, to be provided by the device driver
+ * when calling request_irq() as parameter "dev_id", later
+ * tied to the "action" control block.
+ *
+ * Note : No data area must be added after union ii or the
+ * effective devstat size calculation will fail !
+ */
+typedef struct {
+ unsigned int devno; /* device number, aka. "cuu" from irb */
+ unsigned int intparm; /* interrupt parameter */
+ unsigned char cstat; /* channel status - accumulated */
+ unsigned char dstat; /* device status - accumulated */
+ unsigned char lpum; /* last path used mask from irb */
+ unsigned char unused; /* not used - reserved */
+ unsigned int flag; /* flag : see below */
+ unsigned long cpa; /* CCW address from irb at primary status */
+ unsigned int rescnt; /* res. count from irb at primary status */
+ unsigned int scnt; /* sense count, if DEVSTAT_FLAG_SENSE_AVAIL */
+ union {
+ irb_t irb; /* interruption response block */
+ sense_t sense; /* sense information */
+ } ii; /* interrupt information */
+ } devstat_t;
+
+#define DEVSTAT_FLAG_SENSE_AVAIL 0x00000001
+#define DEVSTAT_NOT_OPER 0x00000002
+#define DEVSTAT_START_FUNCTION 0x00000004
+#define DEVSTAT_HALT_FUNCTION 0x00000008
+#define DEVSTAT_STATUS_PENDING 0x00000010
+#define DEVSTAT_FINAL_STATUS 0x80000000
+
+/*
+ * Flags used as input parameters for do_IO()
+ */
+#define DOIO_EARLY_NOTIFICATION 0x01 /* allow for I/O completion ... */
+ /* ... notification after ... */
+ /* ... primary interrupt status */
+#define DOIO_RETURN_CHAN_END DOIO_EARLY_NOTIFICATION
+#define DOIO_VALID_LPM 0x02 /* LPM input parameter is valid */
+#define DOIO_WAIT_FOR_INTERRUPT 0x04 /* wait synchronously for interrupt */
+#define DOIO_REPORT_ALL 0x08 /* report all interrupt conditions */
+#define DOIO_ALLOW_SUSPEND 0x10 /* allow for channel prog. suspend */
+#define DOIO_DENY_PREFETCH 0x20 /* don't allow for CCW prefetch */
+#define DOIO_SUPPRESS_INTER 0x40 /* suppress intermediate inter. */
+ /* ... for suspended CCWs */
+
+/*
+ * do_IO()
+ *
+ * Start a S/390 channel program. When the interrupt arrives
+ * handle_IRQ_event() is called, which eventually calls the
+ * IRQ handler, either immediately, delayed (dev-end missing,
+ * or sense required) or never (no IRQ handler registered -
+ * should never occur, as the IRQ (subchannel ID) should be
+ * disabled if no handler is present. Depending on the action
+ * taken, do_IO() returns : 0 - Success
+ * -EIO - Status pending
+ * see : action->dev_id->cstat
+ * action->dev_id->dstat
+ * -EBUSY - Device busy
+ * -ENODEV - Device not operational
+ */
+int do_IO( int irq, /* IRQ aka. subchannel number */
+ ccw1_t *cpa, /* logical channel program address */
+ unsigned long initparm, /* interruption parameter */
+ unsigned char lpm, /* logical path mask */
+ unsigned long flag); /* flags : see above */
+
+int start_IO( int irq, /* IRQ aka. subchannel number */
+ ccw1_t *cpa, /* logical channel program address */
+ unsigned long intparm, /* interruption parameter */
+ unsigned char lpm, /* logical path mask */
+ unsigned long flag); /* flags : see above */
+
+int resume_IO( int irq); /* IRQ aka. subchannel number */
+
+int halt_IO( int irq, /* IRQ aka. subchannel number */
+ int intparm, /* dummy intparm */
+ unsigned int flag); /* possible DOIO_WAIT_FOR_INTERRUPT */
+
+
+int process_IRQ( struct pt_regs regs,
+ unsigned int irq,
+ unsigned int intparm);
+
+
+int enable_cpu_sync_isc ( int irq );
+int disable_cpu_sync_isc( int irq );
+
+typedef struct {
+ int irq; /* irq, aka. subchannel */
+ unsigned int devno; /* device number */
+ unsigned int status; /* device status */
+ senseid_t sid_data; /* senseID data */
+ } dev_info_t;
+
+int get_dev_info( int irq, dev_info_t *); /* to be eliminated - don't use */
+
+int get_dev_info_by_irq ( int irq, dev_info_t *pdi);
+int get_dev_info_by_devno( unsigned int devno, dev_info_t *pdi);
+
+int get_irq_by_devno( unsigned int devno );
+unsigned int get_devno_by_irq( int irq );
+
+int read_dev_chars( int irq, void **buffer, int length );
+int read_conf_data( int irq, void **buffer, int *length );
+
+extern senseid_t senseid[NR_IRQS];
+
+extern irq_desc_t irq_desc[NR_IRQS];
+
+extern int handle_IRQ_event(unsigned int, int cpu, struct pt_regs *);
+
+extern int set_cons_dev(int irq);
+extern int reset_cons_dev(int irq);
+extern int wait_cons_dev(int irq);
+
+/*
+ * Some S390 specific IO instructions as inline
+ */
+
+extern __inline__ int stsch(int irq, volatile schib_t *addr)
+{
+ int ccode;
+
+ __asm__ __volatile__(
+ "LR 1,%1\n\t"
+ "STSCH 0(%2)\n\t"
+ "IPM %0\n\t"
+ "SRL %0,28\n\t"
+ : "=d" (ccode) : "r" (irq | 0x10000L), "a" (addr)
+ : "cc", "1" );
+ return ccode;
+}
+
+extern __inline__ int msch(int irq, volatile schib_t *addr)
+{
+ int ccode;
+
+ __asm__ __volatile__(
+ "LR 1,%1\n\t"
+ "MSCH 0(%2)\n\t"
+ "IPM %0\n\t"
+ "SRL %0,28\n\t"
+ : "=d" (ccode) : "r" (irq | 0x10000L), "a" (addr)
+ : "cc", "1" );
+ return ccode;
+}
+
+extern __inline__ int msch_err(int irq, volatile schib_t *addr)
+{
+ int ccode;
+
+ __asm__ __volatile__(
+ " lr 1,%1\n"
+ " msch 0(%2)\n"
+ "0: ipm %0\n"
+ " srl %0,28\n"
+ "1:\n"
+ ".section .fixup,\"ax\"\n"
+ "2: l %0,%3\n"
+ " bras 1,3f\n"
+ " .long 1b\n"
+ "3: l 1,0(1)\n"
+ " br 1\n"
+ ".previous\n"
+ ".section __ex_table,\"a\"\n"
+ " .align 4\n"
+ " .long 0b,2b\n"
+ ".previous"
+ : "=d" (ccode)
+ : "r" (irq | 0x10000L), "a" (addr), "i" (__LC_PGM_ILC)
+ : "cc", "1" );
+ return ccode;
+}
+
+extern __inline__ int tsch(int irq, volatile irb_t *addr)
+{
+ int ccode;
+
+ __asm__ __volatile__(
+ "LR 1,%1\n\t"
+ "TSCH 0(%2)\n\t"
+ "IPM %0\n\t"
+ "SRL %0,28\n\t"
+ : "=d" (ccode) : "r" (irq | 0x10000L), "a" (addr)
+ : "cc", "1" );
+ return ccode;
+}
+
+extern __inline__ int tpi( volatile tpi_info_t *addr)
+{
+ int ccode;
+
+ __asm__ __volatile__(
+ "TPI 0(%1)\n\t"
+ "IPM %0\n\t"
+ "SRL %0,28\n\t"
+ : "=d" (ccode) : "a" (addr)
+ : "cc", "1" );
+ return ccode;
+}
+
+extern __inline__ int ssch(int irq, volatile orb_t *addr)
+{
+ int ccode;
+
+ __asm__ __volatile__(
+ "LR 1,%1\n\t"
+ "SSCH 0(%2)\n\t"
+ "IPM %0\n\t"
+ "SRL %0,28\n\t"
+ : "=d" (ccode) : "r" (irq | 0x10000L), "a" (addr)
+ : "cc", "1" );
+ return ccode;
+}
+
+extern __inline__ int rsch(int irq)
+{
+ int ccode;
+
+ __asm__ __volatile__(
+ "LR 1,%1\n\t"
+ "RSCH\n\t"
+ "IPM %0\n\t"
+ "SRL %0,28\n\t"
+ : "=d" (ccode) : "r" (irq | 0x10000L)
+ : "cc", "1" );
+ return ccode;
+}
+
+extern __inline__ int csch(int irq)
+{
+ int ccode;
+
+ __asm__ __volatile__(
+ "LR 1,%1\n\t"
+ "CSCH\n\t"
+ "IPM %0\n\t"
+ "SRL %0,28\n\t"
+ : "=d" (ccode) : "r" (irq | 0x10000L)
+ : "cc", "1" );
+ return ccode;
+}
+
+extern __inline__ int hsch(int irq)
+{
+ int ccode;
+
+ __asm__ __volatile__(
+ "LR 1,%1\n\t"
+ "HSCH\n\t"
+ "IPM %0\n\t"
+ "SRL %0,28\n\t"
+ : "=d" (ccode) : "r" (irq | 0x10000L)
+ : "cc", "1" );
+ return ccode;
+}
+
+extern __inline__ int iac( void)
+{
+ int ccode;
+
+ __asm__ __volatile__(
+ "IAC %0\n\t"
+ "IPM %0\n\t"
+ "SRL %0,28\n\t"
+ : "=d" (ccode) : : "cc");
+ return ccode;
+}
+
+typedef struct {
+ unsigned int vrdcdvno : 16; /* device number (input) */
+ unsigned int vrdclen : 16; /* data block length (input) */
+ unsigned int vrdcvcla : 8; /* virtual device class (output) */
+ unsigned int vrdcvtyp : 8; /* virtual device type (output) */
+ unsigned int vrdcvsta : 8; /* virtual device status (output) */
+ unsigned int vrdcvfla : 8; /* virtual device flags (output) */
+ unsigned int vrdcrccl : 8; /* real device class (output) */
+ unsigned int vrdccrty : 8; /* real device type (output) */
+ unsigned int vrdccrmd : 8; /* real device model (output) */
+ unsigned int vrdccrft : 8; /* real device feature (output) */
+ } __attribute__ ((packed,aligned(4))) diag210_t;
+
+void VM_virtual_device_info( int devno, /* device number */
+ senseid_t *ps ); /* ptr to senseID data */
+
+extern __inline__ int diag210( diag210_t * addr)
+{
+ int ccode;
+
+ __asm__ __volatile__(
+ "LR 1,%1\n\t"
+ ".long 0x83110210\n\t"
+ "IPM %0\n\t"
+ "SRL %0,28\n\t"
+ : "=d" (ccode) : "a" (addr)
+ : "cc", "1" );
+ return ccode;
+}
+
+/*
+ * Various low-level irq details needed by irq.c, process.c,
+ * time.c, io_apic.c and smp.c
+ *
+ * Interrupt entry/exit code at both C and assembly level
+ */
+
+void mask_irq(unsigned int irq);
+void unmask_irq(unsigned int irq);
+
+#define MAX_IRQ_SOURCES 128
+
+extern spinlock_t irq_controller_lock;
+
+#ifdef __SMP__
+
+#include <asm/atomic.h>
+
+static inline void irq_enter(int cpu, unsigned int irq)
+{
+ hardirq_enter(cpu);
+ while (test_bit(0,&global_irq_lock)) {
+ eieio();
+ }
+}
+
+static inline void irq_exit(int cpu, unsigned int irq)
+{
+ hardirq_exit(cpu);
+ release_irqlock(cpu);
+}
+
+
+#else
+
+#define irq_enter(cpu, irq) (++local_irq_count[cpu])
+#define irq_exit(cpu, irq) (--local_irq_count[cpu])
+
+#endif
+
+#define __STR(x) #x
+#define STR(x) __STR(x)
+
+#ifdef __SMP__
+
+/*
+ * SMP has a few special interrupts for IPI messages
+ */
+
+#endif /* __SMP__ */
+
+/*
+ * x86 profiling function, SMP safe. We might want to do this in
+ * assembly totally?
+ */
+static inline void s390_do_profile (unsigned long addr)
+{
+#if 0
+ if (prof_buffer && current->pid) {
+ addr -= (unsigned long) &_stext;
+ addr >>= prof_shift;
+ /*
+ * Don't ignore out-of-bounds EIP values silently,
+ * put them into the last histogram slot, so if
+ * present, they will show up as a sharp peak.
+ */
+ if (addr > prof_len-1)
+ addr = prof_len-1;
+ atomic_inc((atomic_t *)&prof_buffer[addr]);
+ }
+#endif
+}
+
+#define s390irq_spin_lock(irq) \
+ spin_lock(&(irq_desc[irq].irq_lock))
+
+#define s390irq_spin_unlock(irq) \
+ spin_unlock(&(irq_desc[irq].irq_lock))
+
+#define s390irq_spin_lock_irqsave(irq,flags) \
+ spin_lock_irqsave(&(irq_desc[irq].irq_lock), flags)
+#define s390irq_spin_unlock_irqrestore(irq,flags) \
+ spin_unlock_irqrestore(&(irq_desc[irq].irq_lock), flags)
+#endif
+
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)