From ce823baba072bc727e8f94d269e917e35172eac2 Mon Sep 17 00:00:00 2001
From: Jeff Johnston <jjohnstn@redhat.com>
Date: Fri, 12 Jul 2002 17:55:04 +0000
Subject: 2002-07-12  Chris Demetriou  <cgd@broadcom.com>

        * mips/Makefile.in (GENOBJS2): New variable to name other
        commonly used objects.
        (DVEOBJS, JMR3904OBJS): Reference GENOBJS2.

        * mips/Makefile.in: Add support for Broadcom CFE firmware.
        * mips/configure.in: (mipsisa32*-*-*, *): Likewise.
        * mips/configure: Regenerate.
        * mips/cfe.c: New file.
        * mips/cfe.ld: New file.
        * mips/cfe_api.c: New file.
        * mips/cfe_api.h: New file.
        * mips/cfe_api_int.h: New file.
        * mips/cfe_error.h: New file.
        * mips/cfe_prestart.S: New file.
---
 libgloss/mips/cfe.c | 141 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 141 insertions(+)
 create mode 100644 libgloss/mips/cfe.c

(limited to 'libgloss/mips/cfe.c')

diff --git a/libgloss/mips/cfe.c b/libgloss/mips/cfe.c
new file mode 100644
index 000000000..6efd57d1f
--- /dev/null
+++ b/libgloss/mips/cfe.c
@@ -0,0 +1,141 @@
+/* cfe.c -- I/O code for the MIPS boards running CFE.  */
+
+/*
+ * Copyright 2001, 2002
+ * Broadcom Corporation. All rights reserved.
+ * 
+ * This software is furnished under license and may be used and copied only
+ * in accordance with the following terms and conditions.  Subject to these
+ * conditions, you may download, copy, install, use, modify and distribute
+ * modified or unmodified copies of this software in source and/or binary
+ * form. No title or ownership is transferred hereby.
+ * 
+ * 1) Any source code used, modified or distributed must reproduce and
+ *    retain this copyright notice and list of conditions as they appear in
+ *    the source file.
+ * 
+ * 2) No right is granted to use any trade name, trademark, or logo of
+ *    Broadcom Corporation.  The "Broadcom Corporation" name may not be
+ *    used to endorse or promote products derived from this software
+ *    without the prior written permission of Broadcom Corporation.
+ * 
+ * 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR IMPLIED
+ *    WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF
+ *    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
+ *    NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM BE LIABLE
+ *    FOR ANY DAMAGES WHATSOEVER, AND IN PARTICULAR, BROADCOM SHALL NOT BE
+ *    LIABLE FOR 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,
+ */
+
+#include "cfe_api.h"
+
+char inbyte (void);
+int outbyte (char c);
+
+/* Make sure cfe_prestart is used.  It doesn't look like setting the
+   entry symbol in the linker script to a symbol from that fiel will do
+   this!  */
+extern int _prestart;
+static void *force_prestart = &_prestart;
+
+/* The following variables are initialized to non-zero so that they'll be
+   in data, rather than BSS.  Used to be that you could init variables to
+   any value to put them into initialized data sections rather than BSS,
+   but that decades-old idiom went out the window with gcc 3.2.  Now,
+   either you compile specially (with -fno-zero-initialized-in-bss), or
+   you init to non-zero.  In this case, initting to non-zero is OK (and
+   even beneficial; alignment fault via jump to odd if not properly
+   set up by _prestart()), so we do the latter.  */
+unsigned int __cfe_handle = 0xdeadbeef;
+unsigned int __cfe_entrypt = 0xdeadbeef;
+
+/* Echo input characters?  */
+int	__cfe_echo_input = 0;
+
+/* CFE handle used to access console device.  */
+static int cfe_conshandle;
+
+char
+inbyte (void)
+{
+  unsigned char c;
+  int rv;
+
+  while (cfe_read (cfe_conshandle, &c, 1) != 1)
+    ;
+  if (c == '\r')
+    c = '\n';
+  if (__cfe_echo_input)
+    outbyte (c);
+  return c;
+}
+
+int
+outbyte (char c)
+{
+  int res;
+
+  do
+    {
+      res = cfe_write (cfe_conshandle, &c, 1);
+    }
+  while (res == 0);
+  if (c == '\n')
+    outbyte ('\r');
+  return 0;
+}
+
+/* Initialize hardware.  Called from crt0.  */
+void
+hardware_init_hook(void)
+{
+  cfe_init (__cfe_handle, __cfe_entrypt);
+  cfe_conshandle = cfe_getstdhandle(CFE_STDHANDLE_CONSOLE);
+}
+
+/* Avoid worst-case execution hazards.  This is targetted at the SB-1
+   pipe, and is much worse than it needs to be (not even counting
+   the subroutine call and return).  */
+void
+hardware_hazard_hook(void)
+{
+  __asm__ __volatile__ ("	.set push		\n"
+			"	.set mips32		\n"
+			"	.set noreorder		\n"
+			"	ssnop			\n"
+			"	ssnop			\n"
+			"	ssnop			\n"
+			"	bnel	$0, $0, .+4	\n"
+			"	ssnop			\n"
+			"	.set pop		\n");
+}
+
+/* Exit back to monitor, with the given status code.  */
+void
+hardware_exit_hook (int status)
+{
+  	outbyte ('\r');
+  	outbyte ('\n');
+	cfe_exit (CFE_FLG_WARMSTART, status);
+}
+
+/* Structure filled in by get_mem_info.  Only the size field is
+   actually used (by sbrk), so the others aren't even filled in.  */
+struct s_mem
+{
+  unsigned int size;
+  unsigned int icsize;
+  unsigned int dcsize;
+};
+
+void
+get_mem_info (mem)
+     struct s_mem *mem;
+{
+  /* XXX FIXME: Fake this for now.  Should invoke cfe_enummem, but we
+     don't have enough stack to do that (yet).  */
+  mem->size = 0x4000000;	/* Assume 64 MB of RAM */
+}
-- 
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