Some more includes from NetBSD.

1 files changed, 160 insertions, 0 deletions

diff --git a/sys/arch/sparc64/include/pcb.h b/sys/arch/sparc64/include/pcb.h
new file mode 100644
index 00000000000..3132ba80c00
--- /dev/null
+++ b/sys/arch/sparc64/include/pcb.h
@@ -0,0 +1,160 @@
+/*	$NetBSD: pcb.h,v 1.7 2000/12/29 17:12:05 eeh Exp $ */
+
+/*
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Lawrence Berkeley Laboratory.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)pcb.h	8.1 (Berkeley) 6/11/93
+ */
+
+#include <machine/reg.h>
+
+#ifdef notyet
+#define	PCB_MAXWIN	32	/* architectural limit */
+#else
+#define	PCB_MAXWIN	8	/* worried about u area sizes ... */
+#endif
+
+/*
+ * SPARC Process Control Block.
+ *
+ * pcb_uw is positive if there are any user windows that are
+ * are currently in the CPU windows rather than on the user
+ * stack.  Whenever we are running in the kernel with traps
+ * enabled, we decrement pcb_uw for each ``push'' of a CPU
+ * register window into the stack, and we increment it for
+ * each ``pull'' from the stack into the CPU.  (If traps are
+ * disabled, or if we are in user mode, pcb_uw is junk.)
+ *
+ * To ease computing pcb_uw on traps from user mode, we keep track
+ * of the log base 2 of the single bit that is set in %wim.
+ *
+ * If an overflow occurs while the associated user stack pages
+ * are invalid (paged out), we have to store the registers
+ * in a page that is locked in core while the process runs,
+ * i.e., right here in the pcb.  We also need the stack pointer
+ * for the last such window (but only the last, as the others
+ * are in each window) and the count of windows saved.  We
+ * cheat by having a whole window structure for that one %sp.
+ * Thus, to save window pcb_rw[i] to memory, we write it at
+ * pcb_rw[i + 1].rw_in[6].
+ *
+ * pcb_nsaved has three `kinds' of values.  If 0, it means no
+ * registers are in the PCB (though if pcb_uw is positive,
+ * there may be the next time you look).  If positive, it means
+ * there are no user registers in the CPU, but there are some
+ * saved in pcb_rw[].  As a special case, traps that needed
+ * assistance to pull user registers from the stack also store
+ * the registers in pcb_rw[], and set pcb_nsaved to -1.  This
+ * special state is normally short-term: it can only last until the
+ * trap returns, and it can never persist across entry to user code.
+ */
+/*
+ * v9 addendum:
+ *
+ * Window handling between v8 and v9 has changed somewhat.  There
+ * is no %wim.  Instead, we have a %cwp, %cansave, %canrestore,
+ * %cleanwin, and %otherwin.  By definition:
+ *
+ *	 %cansave + %canrestore + %otherwin = NWINDOWS - 2
+ *
+ * In addition, %cleanwin >= %canrestore since restorable windows
+ * are considered clean.  This means that by storing %canrestore
+ * and %otherwin, we should be able to compute the values of all
+ * the other registers.
+ *
+ * The only other register we need to save is %cwp because it cannot
+ * be trivially computed from the other registers.  The %cwp is
+ * stored in the %tstate register, but if the machine was in a register
+ * window spill/fill handler, the value of that %cwp may be off by 
+ * as much as 2 register windows.  We will also store %cwp.  [We will
+ * try to steal pcb_uw or pcb_nsaved for this purpose eventually.]
+ *
+ * To calculate what registers are in the pcb, start with pcb_cwp
+ * and proceed to (pcb_cwp - pcb_canrestore) % NWINDOWS.  These should
+ * be saved to their appropriate register windows.  The client routine
+ * (trap handler) is responsible for saving pcb_cwp + 1 [%o1-%o7] in
+ * the trap frame or on the stack.
+ *
+ *
+ * Even more addendum:
+ *
+ * With the new system for keeping track of register windows we don't
+ * care about anything other than pcb_uw which keeps track of how many
+ * full windows we have.  As soon as a flush traps, we dump all user
+ * windows to the pcb, handle the fault, then restore all user windows.
+ *
+ * XXX we are using pcb_nsaved as the counter.  pcb_uw is still a mask.  
+ * change this as soon as the new scheme is debugged.
+ */
+struct pcb {
+	u_int64_t	pcb_sp;		/* sp (%o6) when switch() was called */
+	u_int64_t	pcb_pc;		/* pc (%o7) when switch() was called */
+	caddr_t	pcb_onfault;	/* for copyin/out */
+	short	pcb_pstate;	/* %pstate when switch() was called -- may be useful if we support multiple memory models */
+	char	pcb_nsaved;	/* number of windows saved in pcb */
+
+	/* The rest is probably not needed except for pcb_rw */
+	char	pcb_cwp;	/* %cwp when switch() was called */
+	char	pcb_pil;	/* %pil when switch() was called -- prolly not needed */
+
+	const char *lastcall;	/* DEBUG -- name of last system call */
+	/* the following MUST be aligned on a 64-bit boundary */
+	struct	rwindow64 pcb_rw[PCB_MAXWIN];	/* saved windows */
+};
+
+/*
+ * The pcb is augmented with machine-dependent additional data for
+ * core dumps.  Note that the trapframe here is a copy of the one
+ * from the top of the kernel stack (included here so that the kernel
+ * stack itself need not be dumped).
+ */
+struct md_coredump {
+	struct	trapframe64 md_tf;
+	struct	fpstate64 md_fpstate;
+};
+
+#ifdef _KERNEL
+extern struct pcb *cpcb;
+#else
+/* Let gdb compile.  We need fancier macros to make these make sense. */
+#define pcb_psr	pcb_pstate
+#define pcb_wim	pcb_cwp
+#endif /* _KERNEL */