msu.h
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/*
* Intel(R) Trace Hub Memory Storage Unit (MSU) data structures
*
* Copyright (C) 2014-2015 Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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.
*/
#ifndef __INTEL_TH_MSU_H__
#define __INTEL_TH_MSU_H__
enum {
REG_MSU_MSUPARAMS = 0x0000,
REG_MSU_MSUSTS = 0x0008,
REG_MSU_MSC0CTL = 0x0100, /* MSC0 control */
REG_MSU_MSC0STS = 0x0104, /* MSC0 status */
REG_MSU_MSC0BAR = 0x0108, /* MSC0 output base address */
REG_MSU_MSC0SIZE = 0x010c, /* MSC0 output size */
REG_MSU_MSC0MWP = 0x0110, /* MSC0 write pointer */
REG_MSU_MSC0NWSA = 0x011c, /* MSC0 next window start address */
REG_MSU_MSC1CTL = 0x0200, /* MSC1 control */
REG_MSU_MSC1STS = 0x0204, /* MSC1 status */
REG_MSU_MSC1BAR = 0x0208, /* MSC1 output base address */
REG_MSU_MSC1SIZE = 0x020c, /* MSC1 output size */
REG_MSU_MSC1MWP = 0x0210, /* MSC1 write pointer */
REG_MSU_MSC1NWSA = 0x021c, /* MSC1 next window start address */
};
/* MSUSTS bits */
#define MSUSTS_MSU_INT BIT(0)
/* MSCnCTL bits */
#define MSC_EN BIT(0)
#define MSC_WRAPEN BIT(1)
#define MSC_RD_HDR_OVRD BIT(2)
#define MSC_MODE (BIT(4) | BIT(5))
#define MSC_LEN (BIT(8) | BIT(9) | BIT(10))
/* MSC operating modes (MSC_MODE) */
enum {
MSC_MODE_SINGLE = 0,
MSC_MODE_MULTI,
MSC_MODE_EXI,
MSC_MODE_DEBUG,
};
/* MSCnSTS bits */
#define MSCSTS_WRAPSTAT BIT(1) /* Wrap occurred */
#define MSCSTS_PLE BIT(2) /* Pipeline Empty */
/*
* Multiblock/multiwindow block descriptor
*/
struct msc_block_desc {
u32 sw_tag;
u32 block_sz;
u32 next_blk;
u32 next_win;
u32 res0[4];
u32 hw_tag;
u32 valid_dw;
u32 ts_low;
u32 ts_high;
u32 res1[4];
} __packed;
#define MSC_BDESC sizeof(struct msc_block_desc)
#define DATA_IN_PAGE (PAGE_SIZE - MSC_BDESC)
/* MSC multiblock sw tag bits */
#define MSC_SW_TAG_LASTBLK BIT(0)
#define MSC_SW_TAG_LASTWIN BIT(1)
/* MSC multiblock hw tag bits */
#define MSC_HW_TAG_TRIGGER BIT(0)
#define MSC_HW_TAG_BLOCKWRAP BIT(1)
#define MSC_HW_TAG_WINWRAP BIT(2)
#define MSC_HW_TAG_ENDBIT BIT(3)
static inline unsigned long msc_data_sz(struct msc_block_desc *bdesc)
{
if (!bdesc->valid_dw)
return 0;
return bdesc->valid_dw * 4 - MSC_BDESC;
}
static inline bool msc_block_wrapped(struct msc_block_desc *bdesc)
{
if (bdesc->hw_tag & MSC_HW_TAG_BLOCKWRAP)
return true;
return false;
}
static inline bool msc_block_last_written(struct msc_block_desc *bdesc)
{
if ((bdesc->hw_tag & MSC_HW_TAG_ENDBIT) ||
(msc_data_sz(bdesc) != DATA_IN_PAGE))
return true;
return false;
}
/* waiting for Pipeline Empty bit(s) to assert for MSC */
#define MSC_PLE_WAITLOOP_DEPTH 10000
#endif /* __INTEL_TH_MSU_H__ */