Sigh. Add two files needed for the sparc64 fp contect switching code

that were forgotten in the last commit.

Pointy hat to: 	tmm

2 files changed, 145 insertions, 0 deletions

diff --git a/sys/sparc64/include/fp.h b/sys/sparc64/include/fp.h
new file mode 100644
index 0000000..30c74da
--- /dev/null
+++ b/sys/sparc64/include/fp.h
@@ -0,0 +1,87 @@
+/*-
+ * Copyright 2001 by Thomas Moestl <tmm@FreeBSD.org>.  All rights reserved.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef	_MACHINE_FP_H_
+#define	_MACHINE_FP_H_
+
+#define	FPRS_DL		(1 << 0)
+#define	FPRS_DU		(1 << 1)
+#define	FPRS_FEF	(1 << 2)
+
+#define	FSR_CEXC_NX	(1 << 0)
+#define	FSR_CEXC_DZ	(1 << 1)
+#define	FSR_CEXC_UF	(1 << 2)
+#define	FSR_CEXC_OF	(1 << 3)
+#define	FSR_CEXC_NV	(1 << 4)
+#define	FSR_AEXC_NX	(1 << 5)
+#define	FSR_AEXC_DZ	(1 << 6)
+#define	FSR_AEXC_UF	(1 << 7)
+#define	FSR_AEXC_OF	(1 << 8)
+#define	FSR_AEXC_NV	(1 << 9)
+#define	FSR_QNE		(1 << 13)
+#define	FSR_NS		(1 << 22)
+#define	FSR_TEM_NX	(1 << 23)
+#define	FSR_TEM_DZ	(1 << 24)
+#define	FSR_TEM_UF	(1 << 25)
+#define	FSR_TEM_OF	(1 << 26)
+#define	FSR_TEM_NV	(1 << 27)
+
+#define	FSR_FCC0_SHIFT	10
+#define	FSR_FCC0(x)	(((x) >> FSR_FCC0_SHIFT) & 3)
+#define	FSR_FTT_SHIFT	14
+#define	FSR_FTT(x)	(((x) >> FSR_FTT_SHIFT) & 7)
+#define	FSR_VER_SHIFT	17
+#define	FSR_VER(x)	(((x) >> FSR_VER_SHIFT) & 7)
+#define	FSR_RD_SHIFT	30
+#define	FSR_RD(x)	(((x) >> FSR_RD_SHIFT) & 3)
+#define	FSR_FCC1_SHIFT	32
+#define	FSR_FCC1(x)	(((x) >> FSR_FCC1_SHIFT) & 3)
+#define	FSR_FCC2_SHIFT	34
+#define	FSR_FCC2(x)	(((x) >> FSR_FCC2_SHIFT) & 3)
+#define	FSR_FCC3_SHIFT	36
+#define	FSR_FCC3(x)	(((x) >> FSR_FCC3_SHIFT) & 3)
+
+/* A block of 8 double-precision (16 single-precision) FP registers. */
+struct	fpblock {
+	u_long	fpq_l[8];
+};
+
+struct	fpstate {
+	struct	fpblock fp_fb[4];
+	u_long	fp_fsr;
+	u_long	fp_fprs;
+};
+
+void	fp_init_pcb(struct pcb *);
+int	fp_enable_proc(struct proc *);
+/*
+ * Note: The pointers passed to the next two functions must be aligned on
+ * 64 byte boundaries.
+ */
+void	savefpctx(struct fpstate *);
+void	restorefpctx(struct fpstate *);
+
+#endif /* !_MACHINE_FP_H_ */
diff --git a/sys/sparc64/sparc64/fp.c b/sys/sparc64/sparc64/fp.c
new file mode 100644
index 0000000..bec4f70
--- /dev/null
+++ b/sys/sparc64/sparc64/fp.c
@@ -0,0 +1,58 @@
+/*-
+ * Copyright 2001 by Thomas Moestl <tmm@FreeBSD.org>.  All rights reserved.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``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.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/param.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#include <sys/proc.h>
+#include <sys/systm.h>
+#include <sys/user.h>
+
+#include <machine/frame.h>
+#include <machine/pcb.h>
+
+void
+fp_init_pcb(struct pcb *pcb)
+{
+
+	bzero(&pcb->pcb_fpstate.fp_fb, sizeof(pcb->pcb_fpstate.fp_fb));
+	pcb->pcb_fpstate.fp_fsr = FSR_TEM_DZ;
+	pcb->pcb_fpstate.fp_fprs = FPRS_FEF;
+}
+
+int
+fp_enable_proc(struct proc *p)
+{
+	
+	if ((p->p_frame->tf_tstate & TSTATE_PEF) != 0)
+		return (0);
+	mtx_lock_spin(&sched_lock);
+	p->p_frame->tf_tstate |= TSTATE_PEF;
+	/* Actually load the FP state into the registers. */
+	restorefpctx(&p->p_addr->u_pcb.pcb_fpstate);
+	mtx_unlock_spin(&sched_lock);
+	return (1);
+}