From b4523c87c09eb6e4fd56ba876ee956e6330cf9fe Mon Sep 17 00:00:00 2001 From: Suzuki K Poulose Date: Wed, 2 Aug 2017 10:22:05 -0600 Subject: [PATCH] coresight: Add support for reading 64bit registers Add support for reading a lower and upper 32bits of a register as a single 64bit register. Also add simplified macros for direct register accesses. Cc: Mathieu Poirier Signed-off-by: Suzuki K Poulose Signed-off-by: Mathieu Poirier Signed-off-by: Greg Kroah-Hartman --- drivers/hwtracing/coresight/coresight-priv.h | 29 ++++++++++++++++---- 1 file changed, 24 insertions(+), 5 deletions(-) diff --git a/drivers/hwtracing/coresight/coresight-priv.h b/drivers/hwtracing/coresight/coresight-priv.h index 3e25b1dd1a1a..9fdebb773e71 100644 --- a/drivers/hwtracing/coresight/coresight-priv.h +++ b/drivers/hwtracing/coresight/coresight-priv.h @@ -39,23 +39,31 @@ #define ETM_MODE_EXCL_USER BIT(31) typedef u32 (*coresight_read_fn)(const struct device *, u32 offset); -#define coresight_simple_func(type, func, name, offset) \ +#define __coresight_simple_func(type, func, name, lo_off, hi_off) \ static ssize_t name##_show(struct device *_dev, \ struct device_attribute *attr, char *buf) \ { \ type *drvdata = dev_get_drvdata(_dev->parent); \ coresight_read_fn fn = func; \ - u32 val; \ + u64 val; \ pm_runtime_get_sync(_dev->parent); \ if (fn) \ - val = fn(_dev->parent, offset); \ + val = (u64)fn(_dev->parent, lo_off); \ else \ - val = readl_relaxed(drvdata->base + offset); \ + val = coresight_read_reg_pair(drvdata->base, \ + lo_off, hi_off); \ pm_runtime_put_sync(_dev->parent); \ - return scnprintf(buf, PAGE_SIZE, "0x%x\n", val); \ + return scnprintf(buf, PAGE_SIZE, "0x%llx\n", val); \ } \ static DEVICE_ATTR_RO(name) +#define coresight_simple_func(type, func, name, offset) \ + __coresight_simple_func(type, func, name, offset, -1) +#define coresight_simple_reg32(type, name, offset) \ + __coresight_simple_func(type, NULL, name, offset, -1) +#define coresight_simple_reg64(type, name, lo_off, hi_off) \ + __coresight_simple_func(type, NULL, name, lo_off, hi_off) + extern const u32 barrier_pkt[5]; enum etm_addr_type { @@ -108,6 +116,17 @@ static inline void CS_UNLOCK(void __iomem *addr) } while (0); } +static inline u64 +coresight_read_reg_pair(void __iomem *addr, s32 lo_offset, s32 hi_offset) +{ + u64 val; + + val = readl_relaxed(addr + lo_offset); + val |= (hi_offset < 0) ? 0 : + (u64)readl_relaxed(addr + hi_offset) << 32; + return val; +} + 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); -- 2.20.1