Remove special casing for running in the simulator from the kernel

and instead add platform, firmware and EFI stubs to the loader.
The net effect of this change is that besides a special console and
disk driver, the kernel has no knowledge of the simulator. This has
the following advantages:
o  Simulator support is much harder to break,
o  It's easier to make use of more feature complete simulators.
   This would only need a change in the simulator specific loader,
o  Running SMP kernels within the simulator. Note that ski at this
   time does not simulate IPIs, so there's no way to start APs.

The platform, firmware and EFI stubs describe the following hardware:
o  4 CPU Itanium,
o  128 MB RAM within the 4GB address space,
o  64 MB RAM above the 4GB address space.

NOTE: The stubs in the skiloader describe a machine that should in
parts be defined by the simulator. Things like processor interrupt
block and AP wakeup vector cannot be choosen at random because they
require interpretation by the simulator. Currently the simulator is
ignorant of this.

This change introduces an unofficial SSC call SSC_SAL_SET_VECTORS
which is ignored by the simulator.

Tested with: ski (version 0.943 for linux)

1 files changed, 65 insertions, 0 deletions

diff --git a/sys/boot/ia64/libski/pal_stub.S b/sys/boot/ia64/libski/pal_stub.S
new file mode 100644
index 0000000..e67204c
--- /dev/null
+++ b/sys/boot/ia64/libski/pal_stub.S
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2003 Marcel Moolenaar
+ * Copyright (c) 2001 Doug Rabson
+ * 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 AUTHOR 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 AUTHOR 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 <machine/asm.h>
+
+	.text
+ENTRY(PalProc, 0)
+	cmp.eq		p6,p0=6,r28		// PAL_PTCE_INFO
+(p6)	br.cond.dptk	pal_ptce_info
+	;;
+	cmp.eq		p6,p0=8,r28		// PAL_VM_SUMMARY
+(p6)	br.cond.dptk	pal_vm_summary
+	;;
+	cmp.eq		p6,p0=14,r28		// PAL_FREQ_RATIOS
+(p6)	br.cond.dptk	pal_freq_ratios
+	;;
+	mov		r15=66			// EXIT
+	break.i		0x80000			// SSC
+	;;
+pal_ptce_info:
+	mov		r8=0
+	mov		r9=0			// base
+	movl		r10=0x0000000100000001	// loop counts (outer|inner)
+	mov		r11=0x0000000000000000	// loop strides (outer|inner)
+	br.sptk		b0
+pal_vm_summary:
+	mov		r8=0
+	movl		r9=(8<<40)|(8<<32)	// VM info 1
+	mov		r10=(18<<8)|(41<<0)	// VM info 2
+	mov		r11=0
+	br.sptk		b0
+pal_freq_ratios:
+	mov		r8=0
+	movl		r9=0x0000000B00000002	// processor ratio 11/2
+	movl		r10=0x0000000100000001	// bus ratio 1/1
+	movl		r11=0x0000000B00000002	// ITC ratio 11/2
+	br.sptk		b0
+END(PalProc)