Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 95 insertions, 0 deletions

diff --git a/kernel/arch/mips/include/asm/jazzdma.h b/kernel/arch/mips/include/asm/jazzdma.h
new file mode 100644
index 000000000..2cefc3c47
--- /dev/null
+++ b/kernel/arch/mips/include/asm/jazzdma.h
@@ -0,0 +1,95 @@
+/*
+ * Helpfile for jazzdma.c -- Mips Jazz R4030 DMA controller support
+ */
+#ifndef _ASM_JAZZDMA_H
+#define _ASM_JAZZDMA_H
+
+/*
+ * Prototypes and macros
+ */
+extern unsigned long vdma_alloc(unsigned long paddr, unsigned long size);
+extern int vdma_free(unsigned long laddr);
+extern int vdma_remap(unsigned long laddr, unsigned long paddr,
+		      unsigned long size);
+extern unsigned long vdma_phys2log(unsigned long paddr);
+extern unsigned long vdma_log2phys(unsigned long laddr);
+extern void vdma_stats(void);		/* for debugging only */
+
+extern void vdma_enable(int channel);
+extern void vdma_disable(int channel);
+extern void vdma_set_mode(int channel, int mode);
+extern void vdma_set_addr(int channel, long addr);
+extern void vdma_set_count(int channel, int count);
+extern int vdma_get_residue(int channel);
+extern int vdma_get_enable(int channel);
+
+/*
+ * some definitions used by the driver functions
+ */
+#define VDMA_PAGESIZE		4096
+#define VDMA_PGTBL_ENTRIES	4096
+#define VDMA_PGTBL_SIZE		(sizeof(VDMA_PGTBL_ENTRY) * VDMA_PGTBL_ENTRIES)
+#define VDMA_PAGE_EMPTY		0xff000000
+
+/*
+ * Macros to get page no. and offset of a given address
+ * Note that VDMA_PAGE() works for physical addresses only
+ */
+#define VDMA_PAGE(a)		((unsigned int)(a) >> 12)
+#define VDMA_OFFSET(a)		((unsigned int)(a) & (VDMA_PAGESIZE-1))
+
+/*
+ * error code returned by vdma_alloc()
+ * (See also arch/mips/kernel/jazzdma.c)
+ */
+#define VDMA_ERROR		0xffffffff
+
+/*
+ * VDMA pagetable entry description
+ */
+typedef volatile struct VDMA_PGTBL_ENTRY {
+	unsigned int frame;		/* physical frame no. */
+	unsigned int owner;		/* owner of this entry (0=free) */
+} VDMA_PGTBL_ENTRY;
+
+
+/*
+ * DMA channel control registers
+ * in the R4030 MCT_ADR chip
+ */
+#define JAZZ_R4030_CHNL_MODE	0xE0000100	/* 8 DMA Channel Mode Registers, */
+						/* 0xE0000100,120,140... */
+#define JAZZ_R4030_CHNL_ENABLE	0xE0000108	/* 8 DMA Channel Enable Regs, */
+						/* 0xE0000108,128,148... */
+#define JAZZ_R4030_CHNL_COUNT	0xE0000110	/* 8 DMA Channel Byte Cnt Regs, */
+						/* 0xE0000110,130,150... */
+#define JAZZ_R4030_CHNL_ADDR	0xE0000118	/* 8 DMA Channel Address Regs, */
+						/* 0xE0000118,138,158... */
+
+/* channel enable register bits */
+
+#define R4030_CHNL_ENABLE	 (1<<0)
+#define R4030_CHNL_WRITE	 (1<<1)
+#define R4030_TC_INTR		 (1<<8)
+#define R4030_MEM_INTR		 (1<<9)
+#define R4030_ADDR_INTR		 (1<<10)
+
+/*
+ * Channel mode register bits
+ */
+#define R4030_MODE_ATIME_40	 (0) /* device access time on remote bus */
+#define R4030_MODE_ATIME_80	 (1)
+#define R4030_MODE_ATIME_120	 (2)
+#define R4030_MODE_ATIME_160	 (3)
+#define R4030_MODE_ATIME_200	 (4)
+#define R4030_MODE_ATIME_240	 (5)
+#define R4030_MODE_ATIME_280	 (6)
+#define R4030_MODE_ATIME_320	 (7)
+#define R4030_MODE_WIDTH_8	 (1<<3) /* device data bus width */
+#define R4030_MODE_WIDTH_16	 (2<<3)
+#define R4030_MODE_WIDTH_32	 (3<<3)
+#define R4030_MODE_INTR_EN	 (1<<5)
+#define R4030_MODE_BURST	 (1<<6) /* Rev. 2 only */
+#define R4030_MODE_FAST_ACK	 (1<<7) /* Rev. 2 only */
+
+#endif /* _ASM_JAZZDMA_H */