[ARM] tegra: add nvos/nvrm/nvmap drivers

arch/arm/mach-tegra/nv/include/nvrm_drf.h

+/*
+ * Copyright (c) 2007-2009 NVIDIA Corporation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 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.
+ *
+ * Neither the name of the NVIDIA Corporation nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT HOLDER OR CONTRIBUTORS 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.
+ *
+ */
+
+#ifndef INCLUDED_NVRM_DRF_H
+#define INCLUDED_NVRM_DRF_H
+
+/**
+ *  @defgroup nvrm_drf RM DRF Macros
+ * 
+ *  @ingroup nvddk_rm
+ * 
+ * The following suite of macros are used for generating values to write into
+ * hardware registers, or for extracting fields from read registers.  The
+ * hardware headers have a RANGE define for each field in the register in the
+ * form of x:y, 'x' being the high bit, 'y' the lower.  Through a clever use
+ * of the C ternary operator, x:y may be passed into the macros below to
+ * geneate masks, shift values, etc.
+ *
+ * There are two basic flavors of DRF macros, the first is used to define
+ * a new register value from 0, the other is modifiying a field given a
+ * register value.  An example of the first:
+ *
+ * reg = NV_DRF_DEF( HW, REGISTER0, FIELD0, VALUE0 )
+ *     | NV_DRF_DEF( HW, REGISTER0, FIELD3, VALUE2 );
+ *
+ * To modify 'reg' from the previous example:
+ *
+ * reg = NV_FLD_SET_DRF_DEF( HW, REGISTER0, FIELD2, VALUE1, reg );
+ *
+ * To pass in numeric values instead of defined values from the header:
+ *
+ * reg = NV_DRF_NUM( HW, REGISTER3, FIELD2, 1024 );
+ *
+ * To read a value from a register:
+ *
+ * val = NV_DRF_VAL( HW, REGISTER3, FIELD2, reg );
+ *
+ * Some registers have non-zero reset values which may be extracted from the
+ * hardware headers via NV_RESETVAL.
+ */
+
+/*
+ * The NV_FIELD_* macros are helper macros for the public NV_DRF_* macros.
+ */
+#define NV_FIELD_LOWBIT(x)      (0?x)
+#define NV_FIELD_HIGHBIT(x)     (1?x)
+#define NV_FIELD_SIZE(x)        (NV_FIELD_HIGHBIT(x)-NV_FIELD_LOWBIT(x)+1)
+#define NV_FIELD_SHIFT(x)       ((0?x)%32)
+#define NV_FIELD_MASK(x)        (0xFFFFFFFFUL>>(31-((1?x)%32)+((0?x)%32)))
+#define NV_FIELD_BITS(val, x)   (((val) & NV_FIELD_MASK(x))<<NV_FIELD_SHIFT(x))
+#define NV_FIELD_SHIFTMASK(x)   (NV_FIELD_MASK(x)<< (NV_FIELD_SHIFT(x)))
+
+/** NV_DRF_DEF - define a new register value.
+
+    @ingroup nvrm_drf
+ 
+    @param d register domain (hardware block)
+    @param r register name
+    @param f register field
+    @param c defined value for the field
+ */
+#define NV_DRF_DEF(d,r,f,c) \
+    ((d##_##r##_0_##f##_##c) << NV_FIELD_SHIFT(d##_##r##_0_##f##_RANGE))
+
+/** NV_DRF_NUM - define a new register value.
+
+    @ingroup nvrm_drf
+ 
+    @param d register domain (hardware block)
+    @param r register name
+    @param f register field
+    @param n numeric value for the field
+ */
+#define NV_DRF_NUM(d,r,f,n) \
+    (((n)& NV_FIELD_MASK(d##_##r##_0_##f##_RANGE)) << \
+        NV_FIELD_SHIFT(d##_##r##_0_##f##_RANGE))
+
+/** NV_DRF_VAL - read a field from a register.
+
+    @ingroup nvrm_drf
+
+    @param d register domain (hardware block)
+    @param r register name
+    @param f register field
+    @param v register value
+ */
+#define NV_DRF_VAL(d,r,f,v) \
+    (((v)>> NV_FIELD_SHIFT(d##_##r##_0_##f##_RANGE)) & \
+        NV_FIELD_MASK(d##_##r##_0_##f##_RANGE))
+
+/** NV_FLD_SET_DRF_NUM - modify a register field.
+
+    @ingroup nvrm_drf
+
+    @param d register domain (hardware block)
+    @param r register name
+    @param f register field
+    @param n numeric field value
+    @param v register value
+ */
+#define NV_FLD_SET_DRF_NUM(d,r,f,n,v) \
+    ((v & ~NV_FIELD_SHIFTMASK(d##_##r##_0_##f##_RANGE)) | NV_DRF_NUM(d,r,f,n))
+
+/** NV_FLD_SET_DRF_DEF - modify a register field.
+
+    @ingroup nvrm_drf
+
+    @param d register domain (hardware block)
+    @param r register name
+    @param f register field
+    @param c defined field value
+    @param v register value
+ */
+#define NV_FLD_SET_DRF_DEF(d,r,f,c,v) \
+    (((v) & ~NV_FIELD_SHIFTMASK(d##_##r##_0_##f##_RANGE)) | \
+        NV_DRF_DEF(d,r,f,c))
+
+/** NV_RESETVAL - get the reset value for a register.
+
+    @ingroup nvrm_drf
+
+    @param d register domain (hardware block)
+    @param r register name
+ */
+#define NV_RESETVAL(d,r)    (d##_##r##_0_RESET_VAL)
+
+#endif // INCLUDED_NVRM_DRF_H