[MINIOS] Added a new file arc/x86/setup.c and moved some x86 specific

initialization stuff from kernel.c there. Two new functions are added
to handle this.

Signed-off-by: Dietmar Hahn <dietmar.hahn@fujitsu-siemens.com>

1 files changed, 108 insertions, 0 deletions

diff --git a/extras/mini-os/arch/x86/setup.c b/extras/mini-os/arch/x86/setup.c
new file mode 100644
index 0000000000..db24b41ebc
--- /dev/null
+++ b/extras/mini-os/arch/x86/setup.c
@@ -0,0 +1,108 @@
+/******************************************************************************
+ * common.c
+ * 
+ * Common stuff special to x86 goes here.
+ * 
+ * Copyright (c) 2002-2003, K A Fraser & R Neugebauer
+ * Copyright (c) 2005, Grzegorz Milos, Intel Research Cambridge
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+ * DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#include <os.h>
+
+
+/*
+ * Shared page for communicating with the hypervisor.
+ * Events flags go here, for example.
+ */
+shared_info_t *HYPERVISOR_shared_info;
+
+/*
+ * This structure contains start-of-day info, such as pagetable base pointer,
+ * address of the shared_info structure, and things like that.
+ */
+union start_info_union start_info_union;
+
+/*
+ * Just allocate the kernel stack here. SS:ESP is set up to point here
+ * in head.S.
+ */
+char stack[8192];
+
+extern char shared_info[PAGE_SIZE];
+
+/* Assembler interface fns in entry.S. */
+void hypervisor_callback(void);
+void failsafe_callback(void);
+
+#if !defined(CONFIG_X86_PAE)
+#define __pte(x) ((pte_t) { (x) } )
+#else
+#define __pte(x) ({ unsigned long long _x = (x);        \
+    ((pte_t) {(unsigned long)(_x), (unsigned long)(_x>>32)}); })
+#endif
+
+static
+shared_info_t *map_shared_info(unsigned long pa)
+{
+	if ( HYPERVISOR_update_va_mapping(
+		(unsigned long)shared_info, __pte(pa | 7), UVMF_INVLPG) )
+	{
+		printk("Failed to map shared_info!!\n");
+		do_exit();
+	}
+	return (shared_info_t *)shared_info;
+}
+
+void
+arch_init(start_info_t *si)
+{
+	/* Copy the start_info struct to a globally-accessible area. */
+	/* WARN: don't do printk before here, it uses information from
+	   shared_info. Use xprintk instead. */
+	memcpy(&start_info, si, sizeof(*si));
+
+	/* set up minimal memory infos */
+	phys_to_machine_mapping = (unsigned long *)start_info.mfn_list;
+
+	/* Grab the shared_info pointer and put it in a safe place. */
+	HYPERVISOR_shared_info = map_shared_info(start_info.shared_info);
+
+	    /* Set up event and failsafe callback addresses. */
+#ifdef __i386__
+	HYPERVISOR_set_callbacks(
+		__KERNEL_CS, (unsigned long)hypervisor_callback,
+		__KERNEL_CS, (unsigned long)failsafe_callback);
+#else
+	HYPERVISOR_set_callbacks(
+		(unsigned long)hypervisor_callback,
+		(unsigned long)failsafe_callback, 0);
+#endif
+
+}
+
+void
+arch_print_info(void)
+{
+	printk("  stack:      %p-%p\n", stack, stack + 8192);
+}
+
+