Add an abstraction layer to the 64-bit AIM MMU's page table manipulation

logic to support modifying the page table through a hypervisor. This
uses KOBJ inheritance to provide subclasses of the base 64-bit AIM MMU
class with additional methods for page table manipulation.

Many thanks to Peter Grehan for suggesting this design and implementing
the MMU KOBJ inheritance mechanism.

1 files changed, 77 insertions, 0 deletions

diff --git a/sys/powerpc/aim/mmu_oea64.h b/sys/powerpc/aim/mmu_oea64.h
new file mode 100644
index 0000000..101181d
--- /dev/null
+++ b/sys/powerpc/aim/mmu_oea64.h
@@ -0,0 +1,77 @@
+/*-
+ * Copyright (C) 2010 Nathan Whitehorn
+ * 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 ``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 TOOLS GMBH 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _POWERPC_AIM_MMU_OEA64_H
+#define _POWERPC_AIM_MMU_OEA64_H
+
+#include <machine/mmuvar.h>
+
+extern mmu_def_t oea64_mmu;
+
+/*
+ * Helper routines
+ */
+
+/* Allocate physical memory for use in moea64_bootstrap. */
+vm_offset_t	moea64_bootstrap_alloc(vm_size_t, u_int);
+
+/*
+ * Bootstrap subroutines
+ *
+ * An MMU_BOOTSTRAP() implementation looks like this:
+ *   moea64_early_bootstrap();
+ *   Allocate Page Table
+ *   moea64_mid_bootstrap();
+ *   Add mappings for MMU resources
+ *   moea64_late_bootstrap();
+ */
+
+void		moea64_early_bootstrap(mmu_t mmup, vm_offset_t kernelstart,
+		    vm_offset_t kernelend);
+void		moea64_mid_bootstrap(mmu_t mmup, vm_offset_t kernelstart,
+		    vm_offset_t kernelend);
+void		moea64_late_bootstrap(mmu_t mmup, vm_offset_t kernelstart,
+		    vm_offset_t kernelend);
+
+/*
+ * Statistics
+ */
+
+extern u_int	moea64_pte_valid;
+extern u_int	moea64_pte_overflow;
+
+/*
+ * State variables
+ */
+
+extern struct pvo_head *moea64_pvo_table;
+extern int		moea64_large_page_shift;
+extern u_int		moea64_pteg_count;
+extern u_int		moea64_pteg_mask;
+
+#endif /* _POWERPC_AIM_MMU_OEA64_H */
+