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, 350 insertions, 0 deletions

diff --git a/include/asm-sparc64/system.h b/include/asm-sparc64/system.h
new file mode 100644
index 0000000..fd12ca3
--- /dev/null
+++ b/include/asm-sparc64/system.h
@@ -0,0 +1,350 @@
+/* $Id: system.h,v 1.69 2002/02/09 19:49:31 davem Exp $ */
+#ifndef __SPARC64_SYSTEM_H
+#define __SPARC64_SYSTEM_H
+
+#include <linux/config.h>
+#include <asm/ptrace.h>
+#include <asm/processor.h>
+#include <asm/visasm.h>
+
+#ifndef __ASSEMBLY__
+/*
+ * Sparc (general) CPU types
+ */
+enum sparc_cpu {
+  sun4        = 0x00,
+  sun4c       = 0x01,
+  sun4m       = 0x02,
+  sun4d       = 0x03,
+  sun4e       = 0x04,
+  sun4u       = 0x05, /* V8 ploos ploos */
+  sun_unknown = 0x06,
+  ap1000      = 0x07, /* almost a sun4m */
+};
+                  
+#define sparc_cpu_model sun4u
+
+/* This cannot ever be a sun4c nor sun4 :) That's just history. */
+#define ARCH_SUN4C_SUN4 0
+#define ARCH_SUN4 0
+
+#endif
+
+#define setipl(__new_ipl) \
+	__asm__ __volatile__("wrpr	%0, %%pil"  : : "r" (__new_ipl) : "memory")
+
+#define local_irq_disable() \
+	__asm__ __volatile__("wrpr	15, %%pil" : : : "memory")
+
+#define local_irq_enable() \
+	__asm__ __volatile__("wrpr	0, %%pil" : : : "memory")
+
+#define getipl() \
+({ unsigned long retval; __asm__ __volatile__("rdpr	%%pil, %0" : "=r" (retval)); retval; })
+
+#define swap_pil(__new_pil) \
+({	unsigned long retval; \
+	__asm__ __volatile__("rdpr	%%pil, %0\n\t" \
+			     "wrpr	%1, %%pil" \
+			     : "=&r" (retval) \
+			     : "r" (__new_pil) \
+			     : "memory"); \
+	retval; \
+})
+
+#define read_pil_and_cli() \
+({	unsigned long retval; \
+	__asm__ __volatile__("rdpr	%%pil, %0\n\t" \
+			     "wrpr	15, %%pil" \
+			     : "=r" (retval) \
+			     : : "memory"); \
+	retval; \
+})
+
+#define local_save_flags(flags)		((flags) = getipl())
+#define local_irq_save(flags)		((flags) = read_pil_and_cli())
+#define local_irq_restore(flags)		setipl((flags))
+
+/* On sparc64 IRQ flags are the PIL register.  A value of zero
+ * means all interrupt levels are enabled, any other value means
+ * only IRQ levels greater than that value will be received.
+ * Consequently this means that the lowest IRQ level is one.
+ */
+#define irqs_disabled()		\
+({	unsigned long flags;	\
+	local_save_flags(flags);\
+	(flags > 0);		\
+})
+
+#define nop() 		__asm__ __volatile__ ("nop")
+
+#define membar(type)	__asm__ __volatile__ ("membar " type : : : "memory")
+#define mb()		\
+	membar("#LoadLoad | #LoadStore | #StoreStore | #StoreLoad")
+#define rmb()		membar("#LoadLoad")
+#define wmb()		membar("#StoreStore")
+#define read_barrier_depends()		do { } while(0)
+#define set_mb(__var, __value) \
+	do { __var = __value; membar("#StoreLoad | #StoreStore"); } while(0)
+#define set_wmb(__var, __value) \
+	do { __var = __value; membar("#StoreStore"); } while(0)
+
+#ifdef CONFIG_SMP
+#define smp_mb()	mb()
+#define smp_rmb()	rmb()
+#define smp_wmb()	wmb()
+#define smp_read_barrier_depends()	read_barrier_depends()
+#else
+#define smp_mb()	__asm__ __volatile__("":::"memory")
+#define smp_rmb()	__asm__ __volatile__("":::"memory")
+#define smp_wmb()	__asm__ __volatile__("":::"memory")
+#define smp_read_barrier_depends()	do { } while(0)
+#endif
+
+#define flushi(addr)	__asm__ __volatile__ ("flush %0" : : "r" (addr) : "memory")
+
+#define flushw_all()	__asm__ __volatile__("flushw")
+
+/* Performance counter register access. */
+#define read_pcr(__p)  __asm__ __volatile__("rd	%%pcr, %0" : "=r" (__p))
+#define write_pcr(__p) __asm__ __volatile__("wr	%0, 0x0, %%pcr" : : "r" (__p))
+#define read_pic(__p)  __asm__ __volatile__("rd %%pic, %0" : "=r" (__p))
+
+/* Blackbird errata workaround.  See commentary in
+ * arch/sparc64/kernel/smp.c:smp_percpu_timer_interrupt()
+ * for more information.
+ */
+#define reset_pic()    						\
+	__asm__ __volatile__("ba,pt	%xcc, 99f\n\t"		\
+			     ".align	64\n"			\
+			  "99:wr	%g0, 0x0, %pic\n\t"	\
+			     "rd	%pic, %g0")
+
+#ifndef __ASSEMBLY__
+
+extern void sun_do_break(void);
+extern int serial_console;
+extern int stop_a_enabled;
+
+static __inline__ int con_is_present(void)
+{
+	return serial_console ? 0 : 1;
+}
+
+extern void synchronize_user_stack(void);
+
+extern void __flushw_user(void);
+#define flushw_user() __flushw_user()
+
+#define flush_user_windows flushw_user
+#define flush_register_windows flushw_all
+
+#define prepare_arch_switch(rq, next)		\
+do {	spin_lock(&(next)->switch_lock);	\
+	spin_unlock(&(rq)->lock);		\
+	flushw_all();				\
+} while (0)
+
+#define finish_arch_switch(rq, prev)		\
+do {	spin_unlock_irq(&(prev)->switch_lock);	\
+} while (0)
+
+#define task_running(rq, p) \
+	((rq)->curr == (p) || spin_is_locked(&(p)->switch_lock))
+
+	/* See what happens when you design the chip correctly?
+	 *
+	 * We tell gcc we clobber all non-fixed-usage registers except
+	 * for l0/l1.  It will use one for 'next' and the other to hold
+	 * the output value of 'last'.  'next' is not referenced again
+	 * past the invocation of switch_to in the scheduler, so we need
+	 * not preserve it's value.  Hairy, but it lets us remove 2 loads
+	 * and 2 stores in this critical code path.  -DaveM
+	 */
+#if __GNUC__ >= 3
+#define EXTRA_CLOBBER ,"%l1"
+#else
+#define EXTRA_CLOBBER
+#endif
+#define switch_to(prev, next, last)					\
+do {	if (test_thread_flag(TIF_PERFCTR)) {				\
+		unsigned long __tmp;					\
+		read_pcr(__tmp);					\
+		current_thread_info()->pcr_reg = __tmp;			\
+		read_pic(__tmp);					\
+		current_thread_info()->kernel_cntd0 += (unsigned int)(__tmp);\
+		current_thread_info()->kernel_cntd1 += ((__tmp) >> 32);	\
+	}								\
+	flush_tlb_pending();						\
+	save_and_clear_fpu();						\
+	/* If you are tempted to conditionalize the following */	\
+	/* so that ASI is only written if it changes, think again. */	\
+	__asm__ __volatile__("wr %%g0, %0, %%asi"			\
+	: : "r" (__thread_flag_byte_ptr(next->thread_info)[TI_FLAG_BYTE_CURRENT_DS]));\
+	__asm__ __volatile__(						\
+	"mov	%%g4, %%g7\n\t"						\
+	"wrpr	%%g0, 0x95, %%pstate\n\t"				\
+	"stx	%%i6, [%%sp + 2047 + 0x70]\n\t"				\
+	"stx	%%i7, [%%sp + 2047 + 0x78]\n\t"				\
+	"rdpr	%%wstate, %%o5\n\t"					\
+	"stx	%%o6, [%%g6 + %3]\n\t"					\
+	"stb	%%o5, [%%g6 + %2]\n\t"					\
+	"rdpr	%%cwp, %%o5\n\t"					\
+	"stb	%%o5, [%%g6 + %5]\n\t"					\
+	"mov	%1, %%g6\n\t"						\
+	"ldub	[%1 + %5], %%g1\n\t"					\
+	"wrpr	%%g1, %%cwp\n\t"					\
+	"ldx	[%%g6 + %3], %%o6\n\t"					\
+	"ldub	[%%g6 + %2], %%o5\n\t"					\
+	"ldx	[%%g6 + %4], %%o7\n\t"					\
+	"mov	%%g6, %%l2\n\t"						\
+	"wrpr	%%o5, 0x0, %%wstate\n\t"				\
+	"ldx	[%%sp + 2047 + 0x70], %%i6\n\t"				\
+	"ldx	[%%sp + 2047 + 0x78], %%i7\n\t"				\
+	"wrpr	%%g0, 0x94, %%pstate\n\t"				\
+	"mov	%%l2, %%g6\n\t"						\
+	"ldx	[%%g6 + %7], %%g4\n\t"					\
+	"wrpr	%%g0, 0x96, %%pstate\n\t"				\
+	"andcc	%%o7, %6, %%g0\n\t"					\
+	"beq,pt %%icc, 1f\n\t"						\
+	" mov	%%g7, %0\n\t"						\
+	"b,a ret_from_syscall\n\t"					\
+	"1:\n\t"							\
+	: "=&r" (last)							\
+	: "0" (next->thread_info),					\
+	  "i" (TI_WSTATE), "i" (TI_KSP), "i" (TI_FLAGS), "i" (TI_CWP),	\
+	  "i" (_TIF_NEWCHILD), "i" (TI_TASK)				\
+	: "cc",								\
+	        "g1", "g2", "g3",                   "g7",		\
+	              "l2", "l3", "l4", "l5", "l6", "l7",		\
+	  "i0", "i1", "i2", "i3", "i4", "i5",				\
+	  "o0", "o1", "o2", "o3", "o4", "o5",       "o7" EXTRA_CLOBBER);\
+	/* If you fuck with this, update ret_from_syscall code too. */	\
+	if (test_thread_flag(TIF_PERFCTR)) {				\
+		write_pcr(current_thread_info()->pcr_reg);		\
+		reset_pic();						\
+	}								\
+} while(0)
+
+static inline unsigned long xchg32(__volatile__ unsigned int *m, unsigned int val)
+{
+	unsigned long tmp1, tmp2;
+
+	__asm__ __volatile__(
+"	membar		#StoreLoad | #LoadLoad\n"
+"	mov		%0, %1\n"
+"1:	lduw		[%4], %2\n"
+"	cas		[%4], %2, %0\n"
+"	cmp		%2, %0\n"
+"	bne,a,pn	%%icc, 1b\n"
+"	 mov		%1, %0\n"
+"	membar		#StoreLoad | #StoreStore\n"
+	: "=&r" (val), "=&r" (tmp1), "=&r" (tmp2)
+	: "0" (val), "r" (m)
+	: "cc", "memory");
+	return val;
+}
+
+static inline unsigned long xchg64(__volatile__ unsigned long *m, unsigned long val)
+{
+	unsigned long tmp1, tmp2;
+
+	__asm__ __volatile__(
+"	membar		#StoreLoad | #LoadLoad\n"
+"	mov		%0, %1\n"
+"1:	ldx		[%4], %2\n"
+"	casx		[%4], %2, %0\n"
+"	cmp		%2, %0\n"
+"	bne,a,pn	%%xcc, 1b\n"
+"	 mov		%1, %0\n"
+"	membar		#StoreLoad | #StoreStore\n"
+	: "=&r" (val), "=&r" (tmp1), "=&r" (tmp2)
+	: "0" (val), "r" (m)
+	: "cc", "memory");
+	return val;
+}
+
+#define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
+#define tas(ptr) (xchg((ptr),1))
+
+extern void __xchg_called_with_bad_pointer(void);
+
+static __inline__ unsigned long __xchg(unsigned long x, __volatile__ void * ptr,
+				       int size)
+{
+	switch (size) {
+	case 4:
+		return xchg32(ptr, x);
+	case 8:
+		return xchg64(ptr, x);
+	};
+	__xchg_called_with_bad_pointer();
+	return x;
+}
+
+extern void die_if_kernel(char *str, struct pt_regs *regs) __attribute__ ((noreturn));
+
+/* 
+ * 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
+
+static __inline__ unsigned long
+__cmpxchg_u32(volatile int *m, int old, int new)
+{
+	__asm__ __volatile__("membar #StoreLoad | #LoadLoad\n"
+			     "cas [%2], %3, %0\n\t"
+			     "membar #StoreLoad | #StoreStore"
+			     : "=&r" (new)
+			     : "0" (new), "r" (m), "r" (old)
+			     : "memory");
+
+	return new;
+}
+
+static __inline__ unsigned long
+__cmpxchg_u64(volatile long *m, unsigned long old, unsigned long new)
+{
+	__asm__ __volatile__("membar #StoreLoad | #LoadLoad\n"
+			     "casx [%2], %3, %0\n\t"
+			     "membar #StoreLoad | #StoreStore"
+			     : "=&r" (new)
+			     : "0" (new), "r" (m), "r" (old)
+			     : "memory");
+
+	return new;
+}
+
+/* This function doesn't exist, so you'll get a linker error
+   if something tries to do an invalid cmpxchg().  */
+extern void __cmpxchg_called_with_bad_pointer(void);
+
+static __inline__ unsigned long
+__cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size)
+{
+	switch (size) {
+		case 4:
+			return __cmpxchg_u32(ptr, old, new);
+		case 8:
+			return __cmpxchg_u64(ptr, old, new);
+	}
+	__cmpxchg_called_with_bad_pointer();
+	return old;
+}
+
+#define cmpxchg(ptr,o,n)						 \
+  ({									 \
+     __typeof__(*(ptr)) _o_ = (o);					 \
+     __typeof__(*(ptr)) _n_ = (n);					 \
+     (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_,		 \
+				    (unsigned long)_n_, sizeof(*(ptr))); \
+  })
+
+#endif /* !(__ASSEMBLY__) */
+
+#define arch_align_stack(x) (x)
+
+#endif /* !(__SPARC64_SYSTEM_H) */