Support for Bogus Net
Mike Kistler
mkistler at us.ibm.com
Sat Jan 7 14:20:04 EST 2006
I like this approach because it seems like we should be able to quickly
finalize and publish the systemsim-add-bogusnet patch (which is currently
my main focus).
Regarding the systemsim-add-systemsim.h patch, I notice that the XLC forms
(which are available in callthru_config.h) are not in the proposed
systemsim.h file. It would be nice to have these, protected by the
appropriate ifdefs of course, to enable application development with XLC.
Otherwise, we'll need to continue to ship callthru_config.h with Mambo and
point users to this if they want to use XLC.
Regards,
Mike
Arnd Bergmann <arnd at arndb.de>
01/06/2006 08:02 PM
To: Eric V Van hensbergen/Austin/IBM at IBMUS
cc: David Woodhouse <dwmw2 at infradead.org>, Mike
Kistler/Austin/IBM at IBMUS, Patrick Bohrer/Austin/IBM at IBMUS,
rsa at us.ltcfwd.linux.ibm.com, linuxppc64-dev at ozlabs.org, ericvh at gmail.com
Subject: Re: Support for Bogus Net
[added linuxppc64-dev to Cc:]
On Friday 06 January 2006 23:49, Eric V Van hensbergen wrote:
> Okay, I'll merge it up to 2.6.15, remove the bogus halt and console
stuff
> and send it out to this list. We can either merge it with the other
> "stuff" (the console stuff with systemsim.h in it), or submit it after
that
> patch gets submitted mainline.
How about if we make an extra patch for the systemsim.h file? I find it
hard to tell which of the patches (console or the others) is more likely
to go in soon, so maybe it works best to have patches like this:
[patches from eric]
systemsim-add-systemsim.h.diff
systemsim-add-bogusdisk.diff
systemsim-add-bogusnet.diff
[patches from ryan]
hvc-cleanups.diff
hvc-more-changes.diff
hvc-add-rtas.diff
hvc-add-systemsim.diff
with the hvc-add-systemsim.diff depending on
systemsim-add-systemsim.h.diff
to be applied first. For reference, I've added my last version of that
patch
this mail, so we have the same base (and can get comments on it).
Arnd <><
Index: linux-2.6.15-rc/include/asm-powerpc/systemsim.h
===================================================================
--- /dev/null
+++ linux-2.6.15-rc/include/asm-powerpc/systemsim.h
@@ -0,0 +1,132 @@
+/*
+ *
+ * Copyright (C) 2001, 2005 IBM
+ *
+ * Filename : systemsim.h
+ *
+ * Originator : Patrick Bohrer and Charles Lefurgy
+ * Modified By : Eric Van Hensbegren <ericvh at gmail.com>
+ *
+ * Purpose :
+ *
+ * This file is compiled with programs that are run under the
+ * PowerPC Full System simulator. For example, stand-alone programs
+ * or operating systems. The programs call the callthru wrapper
+ * functions which use an illegal PowerPC instruction to signal the
+ * simulator to emulate special support.
+ *
+ */
+
+#ifndef _SYSTEMSIM_CONFIG_H_
+#define _SYSTEMSIM_CONFIG_H_
+#ifdef __KERNEL__
+
+/* The functions callthru0 to callthru5 setup up the arguments for the
+ * simulator callthru and then use the callthru instruction. Note that
+ * 0-5 specify the number of arguments after the command */
+
+/* Note: Arguments are cast as void* to prevent casting by the
+ compiler. This way, you can pass pointers, integers, etc. in
+ machine register and have the simulator interpret what the
+ register is supposed to be. To help with typing errors when using
+ callthrus, we provide wrapper functions for each callthru. The
+ wrappers cast all arguments to void*. Unfortunately, this results
+ in a lot of compiler warnings that I do not know how to remove. If
+ you modify this code, be aware that we are trying to pick a type
+ that is the size of the registers (32-bit or 64-bit) and that is
+ why are choosing to cast to a void* (it should be the size of a
+ machine register) */
+
+static inline int callthru0(int command)
+{
+ register int c asm("r3") = command;
+ asm volatile (".long 0x000eaeb0":"=r" (c):"r"(c));
+ return (c);
+}
+static inline int callthru1(int command, unsigned long arg1)
+{
+ register int c asm("r3") = command;
+ register unsigned long a1 asm("r4") = arg1;
+ asm volatile (".long 0x000eaeb0":"=r" (c):"r"(c),
"r"(a1));
+ return c;
+}
+static inline int callthru2(int command, unsigned long arg1, unsigned
long arg2)
+{
+ register int c asm("r3") = command;
+ register unsigned long a1 asm("r4") = arg1;
+ register unsigned long a2 asm("r5") = arg2;
+ asm volatile (".long 0x000eaeb0":"=r" (c):"r"(c),
"r"(a1), "r"(a2));
+ return c;
+}
+static inline int callthru3(int command, unsigned long arg1, unsigned
long arg2,
+ unsigned long arg3)
+{
+ register int c asm("r3") = command;
+ register unsigned long a1 asm("r4") = arg1;
+ register unsigned long a2 asm("r5") = arg2;
+ register unsigned long a3 asm("r6") = arg3;
+ asm volatile (".long 0x000eaeb0":"=r" (c):"r"(c),
"r"(a1), "r"(a2),
+ "r"(a3));
+ return c;
+}
+static inline int callthru4(int command, unsigned long arg1, unsigned
long arg2,
+ unsigned long arg3,
unsigned long arg4)
+{
+ register int c asm("r3") = command;
+ register unsigned long a1 asm("r4") = arg1;
+ register unsigned long a2 asm("r5") = arg2;
+ register unsigned long a3 asm("r6") = arg3;
+ register unsigned long a4 asm("r7") = arg4;
+ asm volatile (".long 0x000eaeb0":"=r" (c):"r"(c),
"r"(a1), "r"(a2),
+ "r"(a3), "r"(a4));
+ return c;
+}
+static inline int callthru5(int command, unsigned long arg1, unsigned
long arg2,
+ unsigned long arg3,
unsigned long arg4,
+ unsigned long arg5)
+{
+ register int c asm("r3") = command;
+ register unsigned long a1 asm("r4") = arg1;
+ register unsigned long a2 asm("r5") = arg2;
+ register unsigned long a3 asm("r6") = arg3;
+ register unsigned long a4 asm("r7") = arg4;
+ register unsigned long a5 asm("r8") = arg5;
+ asm volatile (".long 0x000eaeb0":"=r" (c):"r"(c),
"r"(a1), "r"(a2),
+ "r"(a3), "r"(a4), "r"(a5));
+ return c;
+}
+static inline int callthru6(int command, unsigned long arg1, unsigned
long arg2,
+ unsigned long arg3,
unsigned long arg4,
+ unsigned long arg5,
unsigned long arg6)
+{
+ register int c asm("r3") = command;
+ register unsigned long a1 asm("r4") = arg1;
+ register unsigned long a2 asm("r5") = arg2;
+ register unsigned long a3 asm("r6") = arg3;
+ register unsigned long a4 asm("r7") = arg4;
+ register unsigned long a5 asm("r8") = arg5;
+ register unsigned long a6 asm("r9") = arg6;
+ asm volatile (".long 0x000eaeb0":"=r" (c):"r"(c),
"r"(a1), "r"(a2),
+ "r"(a3), "r"(a4), "r"(a5),
"r"(a6));
+ return c;
+}
+static inline int callthru7(int command, unsigned long arg1, unsigned
long arg2,
+ unsigned long arg3,
unsigned long arg4,
+ unsigned long arg5,
unsigned long arg6,
+ unsigned long arg7)
+{
+ register int c asm("r3") = command;
+ register unsigned long a1 asm("r4") = arg1;
+ register unsigned long a2 asm("r5") = arg2;
+ register unsigned long a3 asm("r6") = arg3;
+ register unsigned long a4 asm("r7") = arg4;
+ register unsigned long a5 asm("r8") = arg5;
+ register unsigned long a6 asm("r9") = arg6;
+ register unsigned long a7 asm("r10") = arg7;
+ asm volatile (".long 0x000eaeb0":"=r" (c):"r"(c),
"r"(a1), "r"(a2),
+ "r"(a3), "r"(a4), "r"(a5), "r"(a6),
"r"(a7));
+ return c;
+}
+
+#endif /* __KERNEL__ */
+#endif/* _SYSTEMSIM_CONFIG_H_ */
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