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coresight tmc: Add helpers for accessing 64bit registers

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Coresight TMC splits 64bit registers into a pair of 32bit registers
(e.g DBA, RRP, RWP). Provide helpers to read/write to these registers.

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Suzuki K Poulose 2017-08-02 10:22:07 -06:00 committed by Greg Kroah-Hartman
parent 47675f6a46
commit 6f6ab4fce5
4 changed files with 34 additions and 8 deletions
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8
drivers/hwtracing/coresight/coresight-priv.h
View file

@ -127,6 +127,14 @@ coresight_read_reg_pair(void __iomem *addr, s32 lo_offset, s32 hi_offset)
return val;
}
static inline void coresight_write_reg_pair(void __iomem *addr, u64 val,
s32 lo_offset, s32 hi_offset)
{
writel_relaxed((u32)val, addr + lo_offset);
if (hi_offset >= 0)
writel_relaxed((u32)(val >> 32), addr + hi_offset);
}
void coresight_disable_path(struct list_head *path);
int coresight_enable_path(struct list_head *path, u32 mode);
struct coresight_device *coresight_get_sink(struct list_head *path);

8
drivers/hwtracing/coresight/coresight-tmc-etf.c
View file

@ -390,7 +390,7 @@ static void tmc_update_etf_buffer(struct coresight_device *csdev,
int i, cur;
const u32 *barrier;
u32 *buf_ptr;
u32 read_ptr, write_ptr;
u64 read_ptr, write_ptr;
u32 status, to_read;
unsigned long offset;
struct cs_buffers *buf = sink_config;
@ -407,8 +407,8 @@ static void tmc_update_etf_buffer(struct coresight_device *csdev,
tmc_flush_and_stop(drvdata);
read_ptr = readl_relaxed(drvdata->base + TMC_RRP);
write_ptr = readl_relaxed(drvdata->base + TMC_RWP);
read_ptr = tmc_read_rrp(drvdata);
write_ptr = tmc_read_rwp(drvdata);
/*
* Get a hold of the status register and see if a wrap around
@ -460,7 +460,7 @@ static void tmc_update_etf_buffer(struct coresight_device *csdev,
if (read_ptr > (drvdata->size - 1))
read_ptr -= drvdata->size;
/* Tell the HW */
writel_relaxed(read_ptr, drvdata->base + TMC_RRP);
tmc_write_rrp(drvdata, read_ptr);
lost = true;
}

8
drivers/hwtracing/coresight/coresight-tmc-etr.c
View file

@ -44,9 +44,8 @@ static void tmc_etr_enable_hw(struct tmc_drvdata *drvdata)
~(TMC_AXICTL_PROT_CTL_B0 | TMC_AXICTL_PROT_CTL_B1)) |
TMC_AXICTL_PROT_CTL_B1;
writel_relaxed(axictl, drvdata->base + TMC_AXICTL);
tmc_write_dba(drvdata, drvdata->paddr);
writel_relaxed(drvdata->paddr, drvdata->base + TMC_DBALO);
writel_relaxed(0x0, drvdata->base + TMC_DBAHI);
writel_relaxed(TMC_FFCR_EN_FMT | TMC_FFCR_EN_TI |
TMC_FFCR_FON_FLIN | TMC_FFCR_FON_TRIG_EVT |
TMC_FFCR_TRIGON_TRIGIN,
@ -60,10 +59,11 @@ static void tmc_etr_enable_hw(struct tmc_drvdata *drvdata)
static void tmc_etr_dump_hw(struct tmc_drvdata *drvdata)
{
const u32 *barrier;
u32 val;
u32 *temp;
u32 rwp, val;
u64 rwp;
rwp = readl_relaxed(drvdata->base + TMC_RWP);
rwp = tmc_read_rwp(drvdata);
val = readl_relaxed(drvdata->base + TMC_STS);
/*

18
drivers/hwtracing/coresight/coresight-tmc.h
View file

@ -139,4 +139,22 @@ extern const struct coresight_ops tmc_etf_cs_ops;
int tmc_read_prepare_etr(struct tmc_drvdata *drvdata);
int tmc_read_unprepare_etr(struct tmc_drvdata *drvdata);
extern const struct coresight_ops tmc_etr_cs_ops;
#define TMC_REG_PAIR(name, lo_off, hi_off) \
static inline u64 \
tmc_read_##name(struct tmc_drvdata *drvdata) \
{ \
return coresight_read_reg_pair(drvdata->base, lo_off, hi_off); \
} \
static inline void \
tmc_write_##name(struct tmc_drvdata *drvdata, u64 val) \
{ \
coresight_write_reg_pair(drvdata->base, val, lo_off, hi_off); \
}
TMC_REG_PAIR(rrp, TMC_RRP, TMC_RRPHI)
TMC_REG_PAIR(rwp, TMC_RWP, TMC_RWPHI)
TMC_REG_PAIR(dba, TMC_DBALO, TMC_DBAHI)
#endif