pru: Add initial pru_rpmsg library code for Beaglebone PRU

Add external code for using RPMsg on the Beaglebone PRU.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

lib/pru_rpmsg/include/am335x/pru_ecap.h

@@ -0,0 +1,128 @@
+/*
+ * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ *
+ * 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 Texas Instruments Incorporated 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
+ * OWNER 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 _PRU_ECAP_H_
+#define _PRU_ECAP_H_
+
+/* PRU_ECAP register set */
+typedef struct {
+
+	/* PRU_ECAP_TSCTR register bit field */
+	union {
+		volatile uint32_t TSCTR;
+
+		volatile struct {
+			unsigned TSCTR	: 32;		//31:0
+		} TSCTR_bit;
+	};	// 0x0
+
+	/* PRU_ECAP_CTRPHS register bit field */
+	union {
+		volatile uint32_t CTRPHS;
+
+		volatile struct {
+			unsigned CTRPHS	: 32;		//31:0
+		} CTRPHS_bit;
+	};	// 0x4
+
+	/* PRU_ECAP_CAP1 register bit field */
+	union {
+		volatile uint32_t CAP1;
+
+		volatile struct {
+			unsigned CAP1	: 32;		//31:0
+		} CAP1_bit;
+	};	// 0x8
+
+	/* PRU_ECAP_CAP2 register bit field */
+	union {
+		volatile uint32_t CAP2;
+
+		volatile struct {
+			unsigned CAP2	: 32;		//31:0
+		} CAP2_bit;
+	};	// 0xC
+
+	/* PRU_ECAP_CAP3 register bit field */
+	union {
+		volatile uint32_t CAP3;
+
+		volatile struct {
+			unsigned CAP3	: 32;		//31:0
+		} CAP3_bit;
+	};	// 0x10
+
+	/* PRU_ECAP_CAP4 register bit field */
+	union {
+		volatile uint32_t CAP4;
+
+		volatile struct {
+			unsigned CAP4	: 32;		//31:0
+		} CAP4_bit;
+	};	// 0x14
+
+	uint32_t rsvd118[4];		// 0x118 - 0x124
+
+	/* PRU_ECAP_ECCTL1 register bit field */
+	volatile uint16_t ECCTL1; // 0x28
+
+	/* PRU_ECAP_ECCTL2 register bit field */
+	volatile uint16_t ECCTL2;	// 0x2A
+
+	/* PRU_ECAP_ECEINT register bit field */
+	volatile uint16_t ECEINT;	// 0x2C
+
+	/* PRU_ECAP_ECFLG register bit field */
+	volatile uint16_t ECFLG;	// 0x2E
+
+	/* PRU_ECAP_ECCLR register bit field */
+	volatile uint16_t ECCLR;	// 0x30
+
+	/* PRU_ECAP_ECFRC register bit field */
+	volatile uint16_t ECFRC;	// 0x32
+
+	uint32_t rsvd34[10];		// 0x34 - 0x58
+
+	/* PRU_ECAP_REVID register bit field */
+	union {
+		volatile uint32_t REVID;
+
+		volatile struct {
+			unsigned REV		: 32;		//31:0
+		} REVID_bit;
+	};	// 0x5C
+} pruEcap;
+
+volatile __far pruEcap CT_ECAP __attribute__((cregister("PRU_ECAP", near), peripheral));
+
+#endif /* _PRU_ECAP_H_ */