init gnumach copy

1 files changed, 69 insertions, 0 deletions

diff --git a/i386/xen/xen.c b/i386/xen/xen.c
new file mode 100644
index 0000000..5309675
--- /dev/null
+++ b/i386/xen/xen.c
@@ -0,0 +1,69 @@
+/*
+ *  Copyright (C) 2006-2009 Free Software Foundation
+ *
+ * This program is free software ; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation ; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY ; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the program ; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <kern/printf.h>
+#include <kern/debug.h>
+#include <kern/mach_clock.h>
+
+#include <mach/machine/eflags.h>
+#include <machine/thread.h>
+#include <machine/ipl.h>
+#include <machine/model_dep.h>
+
+#include <xen/xen.h>
+
+unsigned long cr3;
+
+void hyp_failsafe_c_callback(struct failsafe_callback_regs *regs) {
+	printf("Fail-Safe callback!\n");
+	printf("IP: %08X CS: %4X DS: %4X ES: %4X FS: %4X GS: %4X FLAGS %08X MASK %04X\n", regs->ip, regs->cs_and_mask & 0xffff, regs->ds, regs->es, regs->fs, regs->gs, regs->flags, regs->cs_and_mask >> 16);
+	panic("failsafe");
+}
+
+extern char return_to_iret[];
+
+void hypclock_machine_intr(int old_ipl, void *ret_addr, struct i386_interrupt_state *regs, uint64_t delta) {
+	if (ret_addr == &return_to_iret) {
+		clock_interrupt(delta/1000,		/* usec per tick */
+			(regs->efl & EFL_VM) ||		/* user mode */ 
+			((regs->cs & 0x02) != 0),	/* user mode */ 
+			old_ipl == SPL0,		/* base priority */
+			regs->eip);			/* interrupted eip */
+	} else
+		clock_interrupt(delta/1000, FALSE, FALSE, 0);
+}
+
+void hyp_p2m_init(void) {
+	unsigned long nb_pfns = vm_page_table_size();
+#ifdef MACH_PSEUDO_PHYS
+#define P2M_PAGE_ENTRIES (PAGE_SIZE / sizeof(unsigned long))
+	unsigned long *l3 = (unsigned long *)phystokv(pmap_grab_page()), *l2 = NULL;
+	unsigned long i;
+
+	for (i = 0; i < (nb_pfns + P2M_PAGE_ENTRIES) / P2M_PAGE_ENTRIES; i++) {
+		if (!(i % P2M_PAGE_ENTRIES)) {
+			l2 = (unsigned long *) phystokv(pmap_grab_page());
+			l3[i / P2M_PAGE_ENTRIES] = kv_to_mfn(l2);
+		}
+		l2[i % P2M_PAGE_ENTRIES] = kv_to_mfn(&mfn_list[i * P2M_PAGE_ENTRIES]);
+	}
+
+	hyp_shared_info.arch.pfn_to_mfn_frame_list_list = kv_to_mfn(l3);
+#endif
+	hyp_shared_info.arch.max_pfn = nb_pfns;
+}