Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 477 insertions, 0 deletions

diff --git a/include/asm-s390/system.h b/include/asm-s390/system.h
new file mode 100644
index 000000000000..81514d76edcf
--- /dev/null
+++ b/include/asm-s390/system.h
@@ -0,0 +1,477 @@
+/*
+ *  include/asm-s390/system.h
+ *
+ *  S390 version
+ *    Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
+ *
+ *  Derived from "include/asm-i386/system.h"
+ */
+
+#ifndef __ASM_SYSTEM_H
+#define __ASM_SYSTEM_H
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <asm/types.h>
+#include <asm/ptrace.h>
+#include <asm/setup.h>
+
+#ifdef __KERNEL__
+
+struct task_struct;
+
+extern struct task_struct *__switch_to(void *, void *);
+
+#ifdef __s390x__
+#define __FLAG_SHIFT 56
+#else /* ! __s390x__ */
+#define __FLAG_SHIFT 24
+#endif /* ! __s390x__ */
+
+static inline void save_fp_regs(s390_fp_regs *fpregs)
+{
+        asm volatile (
+                "   std   0,8(%1)\n"
+                "   std   2,24(%1)\n"
+                "   std   4,40(%1)\n"
+                "   std   6,56(%1)"
+                : "=m" (*fpregs) : "a" (fpregs), "m" (*fpregs) : "memory" );
+        if (!MACHINE_HAS_IEEE)
+                return;
+        asm volatile(
+                "   stfpc 0(%1)\n"
+                "   std   1,16(%1)\n"
+                "   std   3,32(%1)\n"
+                "   std   5,48(%1)\n"
+                "   std   7,64(%1)\n"
+                "   std   8,72(%1)\n"
+                "   std   9,80(%1)\n"
+                "   std   10,88(%1)\n"
+                "   std   11,96(%1)\n"
+                "   std   12,104(%1)\n"
+                "   std   13,112(%1)\n"
+                "   std   14,120(%1)\n"
+                "   std   15,128(%1)\n"
+                : "=m" (*fpregs) : "a" (fpregs), "m" (*fpregs) : "memory" );
+}
+
+static inline void restore_fp_regs(s390_fp_regs *fpregs)
+{
+        asm volatile (
+                "   ld    0,8(%0)\n"
+                "   ld    2,24(%0)\n"
+                "   ld    4,40(%0)\n"
+                "   ld    6,56(%0)"
+                : : "a" (fpregs), "m" (*fpregs) );
+        if (!MACHINE_HAS_IEEE)
+                return;
+        asm volatile(
+                "   lfpc  0(%0)\n"
+                "   ld    1,16(%0)\n"
+                "   ld    3,32(%0)\n"
+                "   ld    5,48(%0)\n"
+                "   ld    7,64(%0)\n"
+                "   ld    8,72(%0)\n"
+                "   ld    9,80(%0)\n"
+                "   ld    10,88(%0)\n"
+                "   ld    11,96(%0)\n"
+                "   ld    12,104(%0)\n"
+                "   ld    13,112(%0)\n"
+                "   ld    14,120(%0)\n"
+                "   ld    15,128(%0)\n"
+                : : "a" (fpregs), "m" (*fpregs) );
+}
+
+static inline void save_access_regs(unsigned int *acrs)
+{
+        asm volatile ("stam 0,15,0(%0)" : : "a" (acrs) : "memory" );
+}
+
+static inline void restore_access_regs(unsigned int *acrs)
+{
+        asm volatile ("lam 0,15,0(%0)" : : "a" (acrs) );
+}
+
+#define switch_to(prev,next,last) do {                                       \
+        if (prev == next)                                                    \
+                break;                                                       \
+        save_fp_regs(&prev->thread.fp_regs);                                 \
+        restore_fp_regs(&next->thread.fp_regs);                              \
+        save_access_regs(&prev->thread.acrs[0]);                             \
+        restore_access_regs(&next->thread.acrs[0]);                          \
+        prev = __switch_to(prev,next);                                       \
+} while (0)
+
+#define prepare_arch_switch(rq, next)   do { } while(0)
+#define task_running(rq, p)             ((rq)->curr == (p))
+
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+extern void account_user_vtime(struct task_struct *);
+extern void account_system_vtime(struct task_struct *);
+
+#define finish_arch_switch(rq, prev) do {                                    \
+        set_fs(current->thread.mm_segment);                                  \
+        spin_unlock(&(rq)->lock);                                            \
+        account_system_vtime(prev);                                          \
+        local_irq_enable();                                                  \
+} while (0)
+
+#else
+
+#define finish_arch_switch(rq, prev) do {                                    \
+        set_fs(current->thread.mm_segment);                                  \
+        spin_unlock_irq(&(rq)->lock);                                        \
+} while (0)
+
+#endif
+
+#define nop() __asm__ __volatile__ ("nop")
+
+#define xchg(ptr,x) \
+  ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(void *)(ptr),sizeof(*(ptr))))
+
+static inline unsigned long __xchg(unsigned long x, void * ptr, int size)
+{
+        unsigned long addr, old;
+        int shift;
+
+        switch (size) {
+        case 1:
+                addr = (unsigned long) ptr;
+                shift = (3 ^ (addr & 3)) << 3;
+                addr ^= addr & 3;
+                asm volatile(
+                        "    l   %0,0(%4)\n"
+                        "0:  lr  0,%0\n"
+                        "    nr  0,%3\n"
+                        "    or  0,%2\n"
+                        "    cs  %0,0,0(%4)\n"
+                        "    jl  0b\n"
+                        : "=&d" (old), "=m" (*(int *) addr)
+                        : "d" (x << shift), "d" (~(255 << shift)), "a" (addr),
+                          "m" (*(int *) addr) : "memory", "cc", "0" );
+                x = old >> shift;
+                break;
+        case 2:
+                addr = (unsigned long) ptr;
+                shift = (2 ^ (addr & 2)) << 3;
+                addr ^= addr & 2;
+                asm volatile(
+                        "    l   %0,0(%4)\n"
+                        "0:  lr  0,%0\n"
+                        "    nr  0,%3\n"
+                        "    or  0,%2\n"
+                        "    cs  %0,0,0(%4)\n"
+                        "    jl  0b\n"
+                        : "=&d" (old), "=m" (*(int *) addr)
+                        : "d" (x << shift), "d" (~(65535 << shift)), "a" (addr),
+                          "m" (*(int *) addr) : "memory", "cc", "0" );
+                x = old >> shift;
+                break;
+        case 4:
+                asm volatile (
+                        "    l   %0,0(%3)\n"
+                        "0:  cs  %0,%2,0(%3)\n"
+                        "    jl  0b\n"
+                        : "=&d" (old), "=m" (*(int *) ptr)
+                        : "d" (x), "a" (ptr), "m" (*(int *) ptr)
+                        : "memory", "cc" );
+                x = old;
+                break;
+#ifdef __s390x__
+        case 8:
+                asm volatile (
+                        "    lg  %0,0(%3)\n"
+                        "0:  csg %0,%2,0(%3)\n"
+                        "    jl  0b\n"
+                        : "=&d" (old), "=m" (*(long *) ptr)
+                        : "d" (x), "a" (ptr), "m" (*(long *) ptr)
+                        : "memory", "cc" );
+                x = old;
+                break;
+#endif /* __s390x__ */
+        }
+        return x;
+}
+
+/*
+ * Atomic compare and exchange.  Compare OLD with MEM, if identical,
+ * store NEW in MEM.  Return the initial value in MEM.  Success is
+ * indicated by comparing RETURN with OLD.
+ */
+
+#define __HAVE_ARCH_CMPXCHG 1
+
+#define cmpxchg(ptr,o,n)\
+        ((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o),\
+                                        (unsigned long)(n),sizeof(*(ptr))))
+
+static inline unsigned long
+__cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size)
+{
+        unsigned long addr, prev, tmp;
+        int shift;
+
+        switch (size) {
+        case 1:
+                addr = (unsigned long) ptr;
+                shift = (3 ^ (addr & 3)) << 3;
+                addr ^= addr & 3;
+                asm volatile(
+                        "    l   %0,0(%4)\n"
+                        "0:  nr  %0,%5\n"
+                        "    lr  %1,%0\n"
+                        "    or  %0,%2\n"
+                        "    or  %1,%3\n"
+                        "    cs  %0,%1,0(%4)\n"
+                        "    jnl 1f\n"
+                        "    xr  %1,%0\n"
+                        "    nr  %1,%5\n"
+                        "    jnz 0b\n"
+                        "1:"
+                        : "=&d" (prev), "=&d" (tmp)
+                        : "d" (old << shift), "d" (new << shift), "a" (ptr),
+                          "d" (~(255 << shift))
+                        : "memory", "cc" );
+                return prev >> shift;
+        case 2:
+                addr = (unsigned long) ptr;
+                shift = (2 ^ (addr & 2)) << 3;
+                addr ^= addr & 2;
+                asm volatile(
+                        "    l   %0,0(%4)\n"
+                        "0:  nr  %0,%5\n"
+                        "    lr  %1,%0\n"
+                        "    or  %0,%2\n"
+                        "    or  %1,%3\n"
+                        "    cs  %0,%1,0(%4)\n"
+                        "    jnl 1f\n"
+                        "    xr  %1,%0\n"
+                        "    nr  %1,%5\n"
+                        "    jnz 0b\n"
+                        "1:"
+                        : "=&d" (prev), "=&d" (tmp)
+                        : "d" (old << shift), "d" (new << shift), "a" (ptr),
+                          "d" (~(65535 << shift))
+                        : "memory", "cc" );
+                return prev >> shift;
+        case 4:
+                asm volatile (
+                        "    cs  %0,%2,0(%3)\n"
+                        : "=&d" (prev) : "0" (old), "d" (new), "a" (ptr)
+                        : "memory", "cc" );
+                return prev;
+#ifdef __s390x__
+        case 8:
+                asm volatile (
+                        "    csg %0,%2,0(%3)\n"
+                        : "=&d" (prev) : "0" (old), "d" (new), "a" (ptr)
+                        : "memory", "cc" );
+                return prev;
+#endif /* __s390x__ */
+        }
+        return old;
+}
+
+/*
+ * Force strict CPU ordering.
+ * And yes, this is required on UP too when we're talking
+ * to devices.
+ *
+ * This is very similar to the ppc eieio/sync instruction in that is
+ * does a checkpoint syncronisation & makes sure that 
+ * all memory ops have completed wrt other CPU's ( see 7-15 POP  DJB ).
+ */
+
+#define eieio()  __asm__ __volatile__ ( "bcr 15,0" : : : "memory" ) 
+# define SYNC_OTHER_CORES(x)   eieio() 
+#define mb()    eieio()
+#define rmb()   eieio()
+#define wmb()   eieio()
+#define read_barrier_depends() do { } while(0)
+#define smp_mb()       mb()
+#define smp_rmb()      rmb()
+#define smp_wmb()      wmb()
+#define smp_read_barrier_depends()    read_barrier_depends()
+#define smp_mb__before_clear_bit()     smp_mb()
+#define smp_mb__after_clear_bit()      smp_mb()
+
+
+#define set_mb(var, value)      do { var = value; mb(); } while (0)
+#define set_wmb(var, value)     do { var = value; wmb(); } while (0)
+
+/* interrupt control.. */
+#define local_irq_enable() ({ \
+        unsigned long  __dummy; \
+        __asm__ __volatile__ ( \
+                "stosm 0(%1),0x03" \
+                : "=m" (__dummy) : "a" (&__dummy) : "memory" ); \
+        })
+
+#define local_irq_disable() ({ \
+        unsigned long __flags; \
+        __asm__ __volatile__ ( \
+                "stnsm 0(%1),0xfc" : "=m" (__flags) : "a" (&__flags) ); \
+        __flags; \
+        })
+
+#define local_save_flags(x) \
+        __asm__ __volatile__("stosm 0(%1),0" : "=m" (x) : "a" (&x), "m" (x) )
+
+#define local_irq_restore(x) \
+        __asm__ __volatile__("ssm   0(%0)" : : "a" (&x), "m" (x) : "memory")
+
+#define irqs_disabled()                 \
+({                                      \
+        unsigned long flags;            \
+        local_save_flags(flags);        \
+        !((flags >> __FLAG_SHIFT) & 3); \
+})
+
+#ifdef __s390x__
+
+#define __load_psw(psw) \
+        __asm__ __volatile__("lpswe 0(%0)" : : "a" (&psw), "m" (psw) : "cc" );
+
+#define __ctl_load(array, low, high) ({ \
+        typedef struct { char _[sizeof(array)]; } addrtype; \
+        __asm__ __volatile__ ( \
+                "   bras  1,0f\n" \
+                "   lctlg 0,0,0(%0)\n" \
+                "0: ex    %1,0(1)" \
+                : : "a" (&array), "a" (((low)<<4)+(high)), \
+                    "m" (*(addrtype *)(array)) : "1" ); \
+        })
+
+#define __ctl_store(array, low, high) ({ \
+        typedef struct { char _[sizeof(array)]; } addrtype; \
+        __asm__ __volatile__ ( \
+                "   bras  1,0f\n" \
+                "   stctg 0,0,0(%1)\n" \
+                "0: ex    %2,0(1)" \
+                : "=m" (*(addrtype *)(array)) \
+                : "a" (&array), "a" (((low)<<4)+(high)) : "1" ); \
+        })
+
+#define __ctl_set_bit(cr, bit) ({ \
+        __u8 __dummy[24]; \
+        __asm__ __volatile__ ( \
+                "    bras  1,0f\n"       /* skip indirect insns */ \
+                "    stctg 0,0,0(%1)\n" \
+                "    lctlg 0,0,0(%1)\n" \
+                "0:  ex    %2,0(1)\n"    /* execute stctl */ \
+                "    lg    0,0(%1)\n" \
+                "    ogr   0,%3\n"       /* set the bit */ \
+                "    stg   0,0(%1)\n" \
+                "1:  ex    %2,6(1)"      /* execute lctl */ \
+                : "=m" (__dummy) \
+                : "a" ((((unsigned long) &__dummy) + 7) & ~7UL), \
+                  "a" (cr*17), "a" (1L<<(bit)) \
+                : "cc", "0", "1" ); \
+        })
+
+#define __ctl_clear_bit(cr, bit) ({ \
+        __u8 __dummy[16]; \
+        __asm__ __volatile__ ( \
+                "    bras  1,0f\n"       /* skip indirect insns */ \
+                "    stctg 0,0,0(%1)\n" \
+                "    lctlg 0,0,0(%1)\n" \
+                "0:  ex    %2,0(1)\n"    /* execute stctl */ \
+                "    lg    0,0(%1)\n" \
+                "    ngr   0,%3\n"       /* set the bit */ \
+                "    stg   0,0(%1)\n" \
+                "1:  ex    %2,6(1)"      /* execute lctl */ \
+                : "=m" (__dummy) \
+                : "a" ((((unsigned long) &__dummy) + 7) & ~7UL), \
+                  "a" (cr*17), "a" (~(1L<<(bit))) \
+                : "cc", "0", "1" ); \
+        })
+
+#else /* __s390x__ */
+
+#define __load_psw(psw) \
+        __asm__ __volatile__("lpsw 0(%0)" : : "a" (&psw) : "cc" );
+
+#define __ctl_load(array, low, high) ({ \
+        typedef struct { char _[sizeof(array)]; } addrtype; \
+        __asm__ __volatile__ ( \
+                "   bras  1,0f\n" \
+                "   lctl 0,0,0(%0)\n" \
+                "0: ex    %1,0(1)" \
+                : : "a" (&array), "a" (((low)<<4)+(high)), \
+                    "m" (*(addrtype *)(array)) : "1" ); \
+        })
+
+#define __ctl_store(array, low, high) ({ \
+        typedef struct { char _[sizeof(array)]; } addrtype; \
+        __asm__ __volatile__ ( \
+                "   bras  1,0f\n" \
+                "   stctl 0,0,0(%1)\n" \
+                "0: ex    %2,0(1)" \
+                : "=m" (*(addrtype *)(array)) \
+                : "a" (&array), "a" (((low)<<4)+(high)): "1" ); \
+        })
+
+#define __ctl_set_bit(cr, bit) ({ \
+        __u8 __dummy[16]; \
+        __asm__ __volatile__ ( \
+                "    bras  1,0f\n"       /* skip indirect insns */ \
+                "    stctl 0,0,0(%1)\n" \
+                "    lctl  0,0,0(%1)\n" \
+                "0:  ex    %2,0(1)\n"    /* execute stctl */ \
+                "    l     0,0(%1)\n" \
+                "    or    0,%3\n"       /* set the bit */ \
+                "    st    0,0(%1)\n" \
+                "1:  ex    %2,4(1)"      /* execute lctl */ \
+                : "=m" (__dummy) \
+                : "a" ((((unsigned long) &__dummy) + 7) & ~7UL), \
+                  "a" (cr*17), "a" (1<<(bit)) \
+                : "cc", "0", "1" ); \
+        })
+
+#define __ctl_clear_bit(cr, bit) ({ \
+        __u8 __dummy[16]; \
+        __asm__ __volatile__ ( \
+                "    bras  1,0f\n"       /* skip indirect insns */ \
+                "    stctl 0,0,0(%1)\n" \
+                "    lctl  0,0,0(%1)\n" \
+                "0:  ex    %2,0(1)\n"    /* execute stctl */ \
+                "    l     0,0(%1)\n" \
+                "    nr    0,%3\n"       /* set the bit */ \
+                "    st    0,0(%1)\n" \
+                "1:  ex    %2,4(1)"      /* execute lctl */ \
+                : "=m" (__dummy) \
+                : "a" ((((unsigned long) &__dummy) + 7) & ~7UL), \
+                  "a" (cr*17), "a" (~(1<<(bit))) \
+                : "cc", "0", "1" ); \
+        })
+#endif /* __s390x__ */
+
+/* For spinlocks etc */
+#define local_irq_save(x)       ((x) = local_irq_disable())
+
+#ifdef CONFIG_SMP
+
+extern void smp_ctl_set_bit(int cr, int bit);
+extern void smp_ctl_clear_bit(int cr, int bit);
+#define ctl_set_bit(cr, bit) smp_ctl_set_bit(cr, bit)
+#define ctl_clear_bit(cr, bit) smp_ctl_clear_bit(cr, bit)
+
+#else
+
+#define ctl_set_bit(cr, bit) __ctl_set_bit(cr, bit)
+#define ctl_clear_bit(cr, bit) __ctl_clear_bit(cr, bit)
+
+#endif /* CONFIG_SMP */
+
+extern void (*_machine_restart)(char *command);
+extern void (*_machine_halt)(void);
+extern void (*_machine_power_off)(void);
+
+#define arch_align_stack(x) (x)
+
+#endif /* __KERNEL__ */
+
+#endif
+