[ubicom32]: move new files out from platform support patch

[openwrt/svn-archive/archive.git] / target / linux / ubicom32 / files / arch / ubicom32 / include / asm / range-protect-asm.h

diff --git a/target/linux/ubicom32/files/arch/ubicom32/include/asm/range-protect-asm.h b/target/linux/ubicom32/files/arch/ubicom32/include/asm/range-protect-asm.h
new file mode 100644 (file)
index 0000000..87459e4
--- /dev/null
+++ b/target/linux/ubicom32/files/arch/ubicom32/include/asm/range-protect-asm.h
@@ -0,0 +1,91 @@
+/*
+ * arch/ubicom32/include/asm/range-protect-asm.h
+ *   Assembly macros for enabling memory protection.
+ *
+ * (C) Copyright 2009, Ubicom, Inc.
+ *
+ * This file is part of the Ubicom32 Linux Kernel Port.
+ *
+ * The Ubicom32 Linux Kernel Port 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.
+ *
+ * The Ubicom32 Linux Kernel Port 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 Ubicom32 Linux Kernel Port.  If not,
+ * see <http://www.gnu.org/licenses/>.
+ *
+ * Ubicom32 implementation derived from (with many thanks):
+ *   arch/m68knommu
+ *   arch/blackfin
+ *   arch/parisc
+ */
+
+#ifndef _ASM_UBICOM32_RANGE_PROTECT_ASM_H
+#define _ASM_UBICOM32_RANGE_PROTECT_ASM_H
+
+#if defined(__ASSEMBLY__)
+
+#include <asm/thread-asm.h>
+
+/*
+ * You should only use the enable/disable ranges when you have the atomic lock,
+ * if you do not there will be problems.
+ */
+
+/*
+ * enable_kernel_ranges
+ *     Enable the kernel ranges (disabling protection) for thread,
+ *     where thread == (1 << thread number)
+ */
+.macro enable_kernel_ranges thread
+#ifdef CONFIG_PROTECT_KERNEL
+       or.4    I_RANGE0_EN, I_RANGE0_EN, \thread        /* Enable Range Register */
+       or.4    D_RANGE0_EN, D_RANGE0_EN, \thread
+       or.4    D_RANGE1_EN, D_RANGE1_EN, \thread
+#endif
+.endm
+
+/*
+ * enable_kernel_ranges_for_current
+ *     Enable the kernel ranges (disabling protection) for this thread
+ */
+.macro enable_kernel_ranges_for_current scratch_reg
+#ifdef CONFIG_PROTECT_KERNEL
+       thread_get_self_mask \scratch_reg
+       enable_kernel_ranges \scratch_reg
+#endif
+.endm
+
+/*
+ * disable_kernel_ranges
+ *     Disables the kernel ranges (enabling protection) for thread
+ *     where thread == (1 << thread number)
+ */
+.macro disable_kernel_ranges thread
+#ifdef CONFIG_PROTECT_KERNEL
+       not.4   \thread, \thread
+       and.4   I_RANGE0_EN, I_RANGE0_EN, \thread        /* Disable Range Register */
+       and.4   D_RANGE0_EN, D_RANGE0_EN, \thread
+       and.4   D_RANGE1_EN, D_RANGE1_EN, \thread
+#endif
+.endm
+
+/*
+ * disable_kernel_ranges_for_current
+ *     Disable kernel ranges (enabling protection) for this thread
+ */
+.macro disable_kernel_ranges_for_current scratch_reg
+#ifdef CONFIG_PROTECT_KERNEL
+       thread_get_self_mask \scratch_reg
+       disable_kernel_ranges \scratch_reg
+#endif
+.endm
+#endif
+
+#endif  /* _ASM_UBICOM32_RANGE_PROTECT_ASM_H */