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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/powerpc/include/asm/tce.h
Initial import
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diff --git a/arch/powerpc/include/asm/tce.h b/arch/powerpc/include/asm/tce.h
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+/*
+ * Copyright (C) 2001 Mike Corrigan & Dave Engebretsen, IBM Corporation
+ * Rewrite, cleanup:
+ * Copyright (C) 2004 Olof Johansson <olof@lixom.net>, IBM Corporation
+ *
+ * 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef _ASM_POWERPC_TCE_H
+#define _ASM_POWERPC_TCE_H
+#ifdef __KERNEL__
+
+#include <asm/iommu.h>
+
+/*
+ * Tces come in two formats, one for the virtual bus and a different
+ * format for PCI. PCI TCEs can have hardware or software maintianed
+ * coherency.
+ */
+#define TCE_VB 0
+#define TCE_PCI 1
+#define TCE_PCI_SWINV_CREATE 2
+#define TCE_PCI_SWINV_FREE 4
+#define TCE_PCI_SWINV_PAIR 8
+
+/* TCE page size is 4096 bytes (1 << 12) */
+
+#define TCE_SHIFT 12
+#define TCE_PAGE_SIZE (1 << TCE_SHIFT)
+
+#define TCE_ENTRY_SIZE 8 /* each TCE is 64 bits */
+
+#define TCE_RPN_MASK 0xfffffffffful /* 40-bit RPN (4K pages) */
+#define TCE_RPN_SHIFT 12
+#define TCE_VALID 0x800 /* TCE valid */
+#define TCE_ALLIO 0x400 /* TCE valid for all lpars */
+#define TCE_PCI_WRITE 0x2 /* write from PCI allowed */
+#define TCE_PCI_READ 0x1 /* read from PCI allowed */
+#define TCE_VB_WRITE 0x1 /* write from VB allowed */
+
+#endif /* __KERNEL__ */
+#endif /* _ASM_POWERPC_TCE_H */