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>

1 files changed, 210 insertions, 0 deletions

diff --git a/lib/pru_rpmsg/include/am335x/sys_mailbox.h b/lib/pru_rpmsg/include/am335x/sys_mailbox.h
new file mode 100644
index 00000000..f2750f75
--- /dev/null
+++ b/lib/pru_rpmsg/include/am335x/sys_mailbox.h
@@ -0,0 +1,210 @@
+/*
+ * 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 _SYS_MAILBOX_H_
+#define _SYS_MAILBOX_H_
+
+/* SYS_MAILBOX register set */
+typedef struct {
+
+	/* SYS_MAILBOX_REVISION register bit field */
+	union {
+		volatile uint32_t REVISION;
+
+		volatile struct {
+			unsigned MINOR	: 6;		//5:0
+			unsigned CUSTOM : 2;		//7:6
+			unsigned MAJOR	: 3;		//10:8
+			unsigned RTL	: 5;		//15:11
+			unsigned FUNC	: 12;		//27:16
+			unsigned rsvd28 : 2;		//29:28
+			unsigned SCHEME : 2;		//31:30
+		} REVISION_bit;
+	};	// 0x0
+
+	uint32_t rsvd4[3];		// 0x4 - 0xC
+
+	/* SYS_MAILBOX_SYSCONFIG register bit field */
+	union {
+		volatile uint32_t SYSCONFIG;
+
+		volatile struct {
+			unsigned SOFTRESET	: 1;	//0
+			unsigned rsvd		: 1;	//1
+			unsigned SLIDLEMODE : 2;	//3:2
+			unsigned rsvd1		: 28;	//31:4
+		} SYSCONFIG_bit;
+	};	// 0x10
+
+	uint32_t rsvd14[11];		// 0x14 - 0x3C
+
+	/* SYS_MAILBOX_MESSAGE register bit fields */
+	union {
+		volatile uint32_t MESSAGE[8];
+
+		volatile struct {
+			unsigned MESSAGE : 32;		//31:0
+		} MESSAGE_bit[8];
+	};	// 0x40-0x5C
+
+	uint32_t rsvd60[8];		// 0x60 - 0x7C
+
+	/* SYS_MAILBOX_FIFOSTATUS register bit fields */
+	union {
+		volatile uint32_t FIFOSTATUS[8];
+
+		volatile struct {
+			unsigned FIFOFULL	: 1;		//0
+			unsigned rsvd		: 31;		//31:1
+		} FIFOSTATUS_bit[8];
+	};	// 0x80-0x9C
+
+	uint32_t rsvdA0[8];		// 0xA0 - 0xBC
+
+	/* SYS_MAILBOX_MSGSTATUS register bit fields */
+	union {
+		volatile uint32_t MSGSTATUS[8];
+
+		volatile struct {
+			unsigned NBOFMSG : 3;		//2:0
+			unsigned rsvd	 : 29;		//31:3
+		} MSGSTATUS_bit[8];
+	};	// 0xC0-DC
+
+	uint32_t rsvdE0[8];		// 0xE0 - 0xFC
+
+	volatile struct {
+		union {
+			volatile uint32_t STATUS_RAW;
+
+			volatile struct {
+				unsigned NEWMSGSTATUSMB0	: 1;		//0
+				unsigned NOTFULLSTATUSMB0	: 1;		//1
+				unsigned NEWMSGSTATUSMB1	: 1;		//2
+				unsigned NOTFULLSTATUSMB1	: 1;		//3
+				unsigned NEWMSGSTATUSMB2	: 1;		//4
+				unsigned NOTFULLSTATUSMB2	: 1;		//5
+				unsigned NEWMSGSTATUSMB3	: 1;		//6
+				unsigned NOTFULLSTATUSMB3	: 1;		//7
+				unsigned NEWMSGSTATUSMB4	: 1;		//8
+				unsigned NOTFULLSTATUSMB4	: 1;		//9
+				unsigned NEWMSGSTATUSMB5	: 1;		//10
+				unsigned NOTFULLSTATUSMB5	: 1;		//11
+				unsigned NEWMSGSTATUSMB6	: 1;		//12
+				unsigned NOTFULLSTATUSMB6	: 1;		//13
+				unsigned NEWMSGSTATUSMB7	: 1;		//14
+				unsigned NOTFULLSTATUSMB7	: 1;		//15
+				unsigned rsvd				: 16;		//31:16
+			} STATUS_RAW_bit;
+		};
+		union {
+			volatile uint32_t STATUS_CLR;
+
+			volatile struct {
+				unsigned NEWMSGSTATUSMB0	: 1;		//0
+				unsigned NOTFULLSTATUSMB0	: 1;		//1
+				unsigned NEWMSGSTATUSMB1	: 1;		//2
+				unsigned NOTFULLSTATUSMB1	: 1;		//3
+				unsigned NEWMSGSTATUSMB2	: 1;		//4
+				unsigned NOTFULLSTATUSMB2	: 1;		//5
+				unsigned NEWMSGSTATUSMB3	: 1;		//6
+				unsigned NOTFULLSTATUSMB3	: 1;		//7
+				unsigned NEWMSGSTATUSMB4	: 1;		//8
+				unsigned NOTFULLSTATUSMB4	: 1;		//9
+				unsigned NEWMSGSTATUSMB5	: 1;		//10
+				unsigned NOTFULLSTATUSMB5	: 1;		//11
+				unsigned NEWMSGSTATUSMB6	: 1;		//12
+				unsigned NOTFULLSTATUSMB6	: 1;		//13
+				unsigned NEWMSGSTATUSMB7	: 1;		//14
+				unsigned NOTFULLSTATUSMB7	: 1;		//15
+				unsigned rsvd				: 16;		//31:16
+			} STATUS_CLR_bit;
+		};
+		union {
+			volatile uint32_t ENABLE_SET;
+
+			volatile struct {
+				unsigned NEWMSGSTATUSMB0	: 1;		//0
+				unsigned NOTFULLSTATUSMB0	: 1;		//1
+				unsigned NEWMSGSTATUSMB1	: 1;		//2
+				unsigned NOTFULLSTATUSMB1	: 1;		//3
+				unsigned NEWMSGSTATUSMB2	: 1;		//4
+				unsigned NOTFULLSTATUSMB2	: 1;		//5
+				unsigned NEWMSGSTATUSMB3	: 1;		//6
+				unsigned NOTFULLSTATUSMB3	: 1;		//7
+				unsigned NEWMSGSTATUSMB4	: 1;		//8
+				unsigned NOTFULLSTATUSMB4	: 1;		//9
+				unsigned NEWMSGSTATUSMB5	: 1;		//10
+				unsigned NOTFULLSTATUSMB5	: 1;		//11
+				unsigned NEWMSGSTATUSMB6	: 1;		//12
+				unsigned NOTFULLSTATUSMB6	: 1;		//13
+				unsigned NEWMSGSTATUSMB7	: 1;		//14
+				unsigned NOTFULLSTATUSMB7	: 1;		//15
+				unsigned rsvd				: 16;		//31:16
+			} ENABLE_SET_bit;
+		};
+		union {
+			volatile uint32_t ENABLE_CLR;
+
+			volatile struct {
+				unsigned NEWMSGSTATUSMB0	: 1;		//0
+				unsigned NOTFULLSTATUSMB0	: 1;		//1
+				unsigned NEWMSGSTATUSMB1	: 1;		//2
+				unsigned NOTFULLSTATUSMB1	: 1;		//3
+				unsigned NEWMSGSTATUSMB2	: 1;		//4
+				unsigned NOTFULLSTATUSMB2	: 1;		//5
+				unsigned NEWMSGSTATUSMB3	: 1;		//6
+				unsigned NOTFULLSTATUSMB3	: 1;		//7
+				unsigned NEWMSGSTATUSMB4	: 1;		//8
+				unsigned NOTFULLSTATUSMB4	: 1;		//9
+				unsigned NEWMSGSTATUSMB5	: 1;		//10
+				unsigned NOTFULLSTATUSMB5	: 1;		//11
+				unsigned NEWMSGSTATUSMB6	: 1;		//12
+				unsigned NOTFULLSTATUSMB6	: 1;		//13
+				unsigned NEWMSGSTATUSMB7	: 1;		//14
+				unsigned NOTFULLSTATUSMB7	: 1;		//15
+				unsigned rsvd				: 16;		//31:16
+			} ENABLE_CLR_bit;
+		};
+	} IRQ[4];
+
+} sysMailbox;
+
+#ifdef __GNUC__
+static volatile sysMailbox *__CT_MBX = (void *)0x480C8000;
+#define CT_MBX	(*__CT_MBX)
+#else
+volatile __far sysMailbox CT_MBX __attribute__((cregister("MBX0", far), peripheral));
+#endif
+
+#endif /* _SYS_MAILBOX_H_ */