thread switching code

4 files changed, 216 insertions, 0 deletions

diff --git a/lib/libc_r/arch/mips/uthread_machdep.c b/lib/libc_r/arch/mips/uthread_machdep.c
new file mode 100644
index 00000000000..fdbc4f279d8
--- /dev/null
+++ b/lib/libc_r/arch/mips/uthread_machdep.c
@@ -0,0 +1,56 @@
+/*	$OpenBSD: uthread_machdep.c,v 1.1 2000/10/03 02:44:15 d Exp $	*/
+/* David Leonard, <d@csee.uq.edu.au>. Public domain. */
+
+/*
+ * Machine-dependent thread state functions for OpenBSD/mips
+ */
+
+#include <pthread.h>
+#include "pthread_private.h"
+
+#define ALIGNBYTES	0x3
+
+struct frame {
+	int	s[9];	/* s0..s7 */
+	int	_fill;
+	double	f[3];	/* $f0..$f2 */
+	int	t9;	/* XXX only used when bootstrapping */
+	int	ra;
+
+	int	arg[4], cra, cfp;  /* ABI space for debuggers */
+};
+
+/*
+ * Given a stack and an entry function, initialise a state
+ * structure that can be later switched to.
+ */
+void
+_thread_machdep_init(statep, base, len, entry)
+	struct _machdep_state* statep;
+	void *base;
+	int len;
+	void (*entry)(void);
+{
+	struct frame *f;
+
+	/* Locate the initial frame, aligned at the top of the stack */
+	f = (struct frame *)(((int)base + len - sizeof *f) & ~ALIGNBYTES);
+	
+	f->cra = f->cfp = 0;			/* for debugger */
+	f->ra = (int)entry;
+	f->t9 = (int)entry;
+
+	statep->frame = (int)f;
+}
+
+void
+_thread_machdep_save_float_state(statep)
+	struct _machdep_state* statep;
+{
+}
+
+void
+_thread_machdep_restore_float_state(statep)
+	struct _machdep_state* statep;
+{
+}
diff --git a/lib/libc_r/arch/mips/uthread_machdep_asm.S b/lib/libc_r/arch/mips/uthread_machdep_asm.S
new file mode 100644
index 00000000000..d7fc757f1ba
--- /dev/null
+++ b/lib/libc_r/arch/mips/uthread_machdep_asm.S
@@ -0,0 +1,52 @@
+/*	$OpenBSD: uthread_machdep_asm.S,v 1.1 2000/10/03 02:44:15 d Exp $	*/
+/* David Leonard, <d@csee.uq.edu.au>. Public domain. */
+
+#include <machine/asm.h>
+
+#define SOFF(n)		((n)*4)
+#define FPOFF(n)	(SOFF(9) + 4 + (n)*8)
+#define REGOFF(n)	(FPOFF(3) + (n)*4)
+
+#define FRAMESIZE	(REGOFF(2) + 4*4+4+4)
+
+NON_LEAF(_thread_machdep_switch, FRAMESIZE, ra)
+	add	sp, sp, -FRAMESIZE
+
+	sw	s0, SOFF(0)(sp)
+	sw	s1, SOFF(1)(sp)
+	sw	s2, SOFF(2)(sp)
+	sw	s3, SOFF(3)(sp)
+	sw	s4, SOFF(4)(sp)
+	sw	s5, SOFF(5)(sp)
+	sw	s6, SOFF(6)(sp)
+	sw	s7, SOFF(7)(sp)
+	sw	s8, SOFF(8)(sp)
+	s.d	$f0, FPOFF(0)(sp)	/* XXX why? */
+	s.d	$f2, FPOFF(1)(sp)
+	s.d	$f4, FPOFF(2)(sp)
+	sw	t9, REGOFF(0)(sp)
+	sw	ra, REGOFF(1)(sp)
+
+	sw	sp, 0(a1)
+	lw	sp, 0(a0)
+
+	.set	noreorder		/* avoid nops */
+	lw	ra, REGOFF(1)(sp)
+	lw	t9, REGOFF(0)(sp)
+	l.d	$f4, FPOFF(2)(sp)
+	l.d	$f2, FPOFF(1)(sp)
+	l.d	$f0, FPOFF(0)(sp)
+	lw	s8, SOFF(8)(sp)
+	lw	s7, SOFF(7)(sp)
+	lw	s6, SOFF(6)(sp)
+	lw	s5, SOFF(5)(sp)
+	lw	s4, SOFF(4)(sp)
+	lw	s3, SOFF(3)(sp)
+	lw	s2, SOFF(2)(sp)
+	lw	s1, SOFF(1)(sp)
+	lw	s0, SOFF(0)(sp)
+	.set	reorder
+
+	add	sp, sp, FRAMESIZE
+	j	ra
+END(_thread_machdep_switch)
diff --git a/lib/libpthread/arch/mips/uthread_machdep.c b/lib/libpthread/arch/mips/uthread_machdep.c
new file mode 100644
index 00000000000..fdbc4f279d8
--- /dev/null
+++ b/lib/libpthread/arch/mips/uthread_machdep.c
@@ -0,0 +1,56 @@
+/*	$OpenBSD: uthread_machdep.c,v 1.1 2000/10/03 02:44:15 d Exp $	*/
+/* David Leonard, <d@csee.uq.edu.au>. Public domain. */
+
+/*
+ * Machine-dependent thread state functions for OpenBSD/mips
+ */
+
+#include <pthread.h>
+#include "pthread_private.h"
+
+#define ALIGNBYTES	0x3
+
+struct frame {
+	int	s[9];	/* s0..s7 */
+	int	_fill;
+	double	f[3];	/* $f0..$f2 */
+	int	t9;	/* XXX only used when bootstrapping */
+	int	ra;
+
+	int	arg[4], cra, cfp;  /* ABI space for debuggers */
+};
+
+/*
+ * Given a stack and an entry function, initialise a state
+ * structure that can be later switched to.
+ */
+void
+_thread_machdep_init(statep, base, len, entry)
+	struct _machdep_state* statep;
+	void *base;
+	int len;
+	void (*entry)(void);
+{
+	struct frame *f;
+
+	/* Locate the initial frame, aligned at the top of the stack */
+	f = (struct frame *)(((int)base + len - sizeof *f) & ~ALIGNBYTES);
+	
+	f->cra = f->cfp = 0;			/* for debugger */
+	f->ra = (int)entry;
+	f->t9 = (int)entry;
+
+	statep->frame = (int)f;
+}
+
+void
+_thread_machdep_save_float_state(statep)
+	struct _machdep_state* statep;
+{
+}
+
+void
+_thread_machdep_restore_float_state(statep)
+	struct _machdep_state* statep;
+{
+}
diff --git a/lib/libpthread/arch/mips/uthread_machdep_asm.S b/lib/libpthread/arch/mips/uthread_machdep_asm.S
new file mode 100644
index 00000000000..d7fc757f1ba
--- /dev/null
+++ b/lib/libpthread/arch/mips/uthread_machdep_asm.S
@@ -0,0 +1,52 @@
+/*	$OpenBSD: uthread_machdep_asm.S,v 1.1 2000/10/03 02:44:15 d Exp $	*/
+/* David Leonard, <d@csee.uq.edu.au>. Public domain. */
+
+#include <machine/asm.h>
+
+#define SOFF(n)		((n)*4)
+#define FPOFF(n)	(SOFF(9) + 4 + (n)*8)
+#define REGOFF(n)	(FPOFF(3) + (n)*4)
+
+#define FRAMESIZE	(REGOFF(2) + 4*4+4+4)
+
+NON_LEAF(_thread_machdep_switch, FRAMESIZE, ra)
+	add	sp, sp, -FRAMESIZE
+
+	sw	s0, SOFF(0)(sp)
+	sw	s1, SOFF(1)(sp)
+	sw	s2, SOFF(2)(sp)
+	sw	s3, SOFF(3)(sp)
+	sw	s4, SOFF(4)(sp)
+	sw	s5, SOFF(5)(sp)
+	sw	s6, SOFF(6)(sp)
+	sw	s7, SOFF(7)(sp)
+	sw	s8, SOFF(8)(sp)
+	s.d	$f0, FPOFF(0)(sp)	/* XXX why? */
+	s.d	$f2, FPOFF(1)(sp)
+	s.d	$f4, FPOFF(2)(sp)
+	sw	t9, REGOFF(0)(sp)
+	sw	ra, REGOFF(1)(sp)
+
+	sw	sp, 0(a1)
+	lw	sp, 0(a0)
+
+	.set	noreorder		/* avoid nops */
+	lw	ra, REGOFF(1)(sp)
+	lw	t9, REGOFF(0)(sp)
+	l.d	$f4, FPOFF(2)(sp)
+	l.d	$f2, FPOFF(1)(sp)
+	l.d	$f0, FPOFF(0)(sp)
+	lw	s8, SOFF(8)(sp)
+	lw	s7, SOFF(7)(sp)
+	lw	s6, SOFF(6)(sp)
+	lw	s5, SOFF(5)(sp)
+	lw	s4, SOFF(4)(sp)
+	lw	s3, SOFF(3)(sp)
+	lw	s2, SOFF(2)(sp)
+	lw	s1, SOFF(1)(sp)
+	lw	s0, SOFF(0)(sp)
+	.set	reorder
+
+	add	sp, sp, FRAMESIZE
+	j	ra
+END(_thread_machdep_switch)