/**
- * Copyright (C) ARM Limited 2013. All rights reserved.
+ * Copyright (C) ARM Limited 2013-2014. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
-/*******************************************************************************
- * WARNING: This code is an experimental implementation of the CCN-504 hardware
- * counters which has not been tested on the hardware. Commented debug
- * statements are present and can be uncommented for diagnostic purposes.
- ******************************************************************************/
-
#include <linux/io.h>
#include <linux/module.h>
#include "gator.h"
-#define PERIPHBASE 0x2E000000
-
#define NUM_REGIONS 256
#define REGION_SIZE (64*1024)
#define REGION_DEBUG 1
#define REGION_XP 64
+#define NUM_XPS 11
// DT (Debug) region
#define PMEVCNTSR0 0x0150
// XP region
#define DT_CONFIG 0x0300
+#define DT_CONTROL 0x0370
// Multiple
#define PMU_EVENT_SEL 0x0600
#define OLY_ID 0xFF00
#define CCNT 4
-#define CNTMAX (4 + 1)
+#define CNTMAX (CCNT + 1)
#define get_pmu_event_id(event) (((event) >> 0) & 0xFF)
#define get_node_type(event) (((event) >> 8) & 0xFF)
#define get_region(event) (((event) >> 16) & 0xFF)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 36)
+
+// From kernel/params.c
+#define STANDARD_PARAM_DEF(name, type, format, tmptype, strtolfn) \
+ int param_set_##name(const char *val, struct kernel_param *kp) \
+ { \
+ tmptype l; \
+ int ret; \
+ \
+ if (!val) return -EINVAL; \
+ ret = strtolfn(val, 0, &l); \
+ if (ret == -EINVAL || ((type)l != l)) \
+ return -EINVAL; \
+ *((type *)kp->arg) = l; \
+ return 0; \
+ } \
+ int param_get_##name(char *buffer, struct kernel_param *kp) \
+ { \
+ return sprintf(buffer, format, *((type *)kp->arg)); \
+ }
+
+#else
+
+// From kernel/params.c
+#define STANDARD_PARAM_DEF(name, type, format, tmptype, strtolfn) \
+ int param_set_##name(const char *val, const struct kernel_param *kp) \
+ { \
+ tmptype l; \
+ int ret; \
+ \
+ ret = strtolfn(val, 0, &l); \
+ if (ret < 0 || ((type)l != l)) \
+ return ret < 0 ? ret : -EINVAL; \
+ *((type *)kp->arg) = l; \
+ return 0; \
+ } \
+ int param_get_##name(char *buffer, const struct kernel_param *kp) \
+ { \
+ return scnprintf(buffer, PAGE_SIZE, format, \
+ *((type *)kp->arg)); \
+ } \
+ struct kernel_param_ops param_ops_##name = { \
+ .set = param_set_##name, \
+ .get = param_get_##name, \
+ }; \
+ EXPORT_SYMBOL(param_set_##name); \
+ EXPORT_SYMBOL(param_get_##name); \
+ EXPORT_SYMBOL(param_ops_##name)
+
+#endif
+
+STANDARD_PARAM_DEF(u64, u64, "%llu", u64, strict_strtoull);
+
+// From include/linux/moduleparam.h
+#define param_check_u64(name, p) __param_check(name, p, u64)
+
MODULE_PARM_DESC(ccn504_addr, "CCN-504 physical base address");
-static unsigned long ccn504_addr = 0;
-module_param(ccn504_addr, ulong, 0444);
+static u64 ccn504_addr = 0;
+module_param(ccn504_addr, u64, 0444);
static void __iomem *gator_events_ccn504_base;
+static bool gator_events_ccn504_global_enabled;
static unsigned long gator_events_ccn504_enabled[CNTMAX];
static unsigned long gator_events_ccn504_event[CNTMAX];
static unsigned long gator_events_ccn504_key[CNTMAX];
static int gator_events_ccn504_buffer[2*CNTMAX];
+static int gator_events_ccn504_prev[CNTMAX];
static void gator_events_ccn504_create_shutdown(void)
{
dt_config = readl(gator_events_ccn504_base + (REGION_XP + xp_node_id)*REGION_SIZE + DT_CONFIG);
dt_config |= (value + event_num) << (4*event_num);
- //printk(KERN_ERR "%s(%s:%i) writel %x %x\n", __FUNCTION__, __FILE__, __LINE__, dt_config, (REGION_XP + xp_node_id)*REGION_SIZE + DT_CONFIG);
writel(dt_config, gator_events_ccn504_base + (REGION_XP + xp_node_id)*REGION_SIZE + DT_CONFIG);
}
{
int i;
+ gator_events_ccn504_global_enabled = 0;
+ for (i = 0; i < CNTMAX; ++i) {
+ if (gator_events_ccn504_enabled[i]) {
+ gator_events_ccn504_global_enabled = 1;
+ break;
+ }
+ }
+
+ if (!gator_events_ccn504_global_enabled) {
+ return 0;
+ }
+
+ memset(&gator_events_ccn504_prev, 0x80, sizeof(gator_events_ccn504_prev));
+
// Disable INTREQ on overflow
// [6] ovfl_intr_en = 0
// perhaps set to 1?
// [4:1] cntcfg = 0
// Enable PMU features
// [0] pmu_en = 1
- //printk(KERN_ERR "%s(%s:%i) writel %x %x\n", __FUNCTION__, __FILE__, __LINE__, 0x1, REGION_DEBUG*REGION_SIZE + PMCR);
writel(0x1, gator_events_ccn504_base + REGION_DEBUG*REGION_SIZE + PMCR);
+ // Configure the XPs
+ for (i = 0; i < NUM_XPS; ++i) {
+ int dt_control;
+
+ // Pass on all events
+ writel(0, gator_events_ccn504_base + (REGION_XP + i)*REGION_SIZE + DT_CONFIG);
+
+ // Enable PMU capability
+ // [0] dt_enable = 1
+ dt_control = readl(gator_events_ccn504_base + (REGION_XP + i)*REGION_SIZE + DT_CONTROL);
+ dt_control |= 0x1;
+ writel(dt_control, gator_events_ccn504_base + (REGION_XP + i)*REGION_SIZE + DT_CONTROL);
+ }
+
// Assume no other pmu_event_sel registers are set
// cycle counter does not need to be enabled
pmu_event_id = get_pmu_event_id(gator_events_ccn504_event[i]);
node_type = get_node_type(gator_events_ccn504_event[i]);
region = get_region(gator_events_ccn504_event[i]);
- //printk(KERN_ERR "%s(%s:%i) pmu_event_id: %x node_type: %x region: %x\n", __FUNCTION__, __FILE__, __LINE__, pmu_event_id, node_type, region);
// Verify the node_type
oly_id_whole = readl(gator_events_ccn504_base + region*REGION_SIZE + OLY_ID);
oly_id = oly_id_whole & 0x1F;
node_id = (oly_id_whole >> 8) & 0x7F;
if ((oly_id != node_type) ||
- ((node_type == 0x16) && ((oly_id == 0x14) || (oly_id == 0x15) || (oly_id == 0x16) || (oly_id == 0x18) || (oly_id == 0x19) || (oly_id == 0x1A)))) {
- printk(KERN_ERR "%s(%s:%i) oly_id is %x expected %x\n", __FUNCTION__, __FILE__, __LINE__, oly_id, node_type);
+ ((node_type == 0x16) && ((oly_id != 0x14) && (oly_id != 0x15) && (oly_id != 0x16) && (oly_id != 0x18) && (oly_id != 0x19) && (oly_id != 0x1A)))) {
+ printk(KERN_ERR "gator: oly_id is 0x%x expected 0x%x\n", oly_id, node_type);
return -1;
}
gator_events_ccn504_set_dt_config(node_id/2, i, (node_id & 1) == 0 ? 0x8 : 0xC);
break;
}
- //printk(KERN_ERR "%s(%s:%i) writel %x %x\n", __FUNCTION__, __FILE__, __LINE__, pmu_event_sel, region*REGION_SIZE + PMU_EVENT_SEL);
writel(pmu_event_sel, gator_events_ccn504_base + region*REGION_SIZE + PMU_EVENT_SEL);
}
{
int i;
+ if (!gator_events_ccn504_global_enabled) {
+ return;
+ }
+
// cycle counter does not need to be disabled
for (i = 0; i < CCNT; ++i) {
- int node_type;
int region;
- node_type = get_node_type(gator_events_ccn504_event[i]);
+ if (!gator_events_ccn504_enabled[i]) {
+ continue;
+ }
+
region = get_region(gator_events_ccn504_event[i]);
- //printk(KERN_ERR "%s(%s:%i) writel %x %x\n", __FUNCTION__, __FILE__, __LINE__, 0, region*REGION_SIZE + PMU_EVENT_SEL);
writel(0, gator_events_ccn504_base + region*REGION_SIZE + PMU_EVENT_SEL);
}
// Clear dt_config
- for (i = 0; i < 11; ++i) {
- //printk(KERN_ERR "%s(%s:%i) writel %x %x\n", __FUNCTION__, __FILE__, __LINE__, 0, (REGION_XP + i)*REGION_SIZE + DT_CONFIG);
+ for (i = 0; i < NUM_XPS; ++i) {
writel(0, gator_events_ccn504_base + (REGION_XP + i)*REGION_SIZE + DT_CONFIG);
}
}
{
int i;
int len = 0;
+ int value;
- if (!on_primary_core()) {
+ if (!on_primary_core() || !gator_events_ccn504_global_enabled) {
return 0;
}
// Verify the pmsr register is zero
- //i = 0;
- while (readl(gator_events_ccn504_base + REGION_DEBUG*REGION_SIZE + PMSR) != 0) {
- //++i;
- }
- //printk(KERN_ERR "%s(%s:%i) %i\n", __FUNCTION__, __FILE__, __LINE__, i);
+ while (readl(gator_events_ccn504_base + REGION_DEBUG*REGION_SIZE + PMSR) != 0);
// Request a PMU snapshot
writel(1, gator_events_ccn504_base + REGION_DEBUG*REGION_SIZE + PMSR_REQ);
// Wait for the snapshot
- //i = 0;
- while (readl(gator_events_ccn504_base + REGION_DEBUG*REGION_SIZE + PMSR) == 0) {
- //++i;
- }
- //printk(KERN_ERR "%s(%s:%i) %i\n", __FUNCTION__, __FILE__, __LINE__, i);
+ while (readl(gator_events_ccn504_base + REGION_DEBUG*REGION_SIZE + PMSR) == 0);
// Read the shadow registers
for (i = 0; i < CNTMAX; ++i) {
continue;
}
- gator_events_ccn504_buffer[len++] = gator_events_ccn504_key[i];
- gator_events_ccn504_buffer[len++] = readl(gator_events_ccn504_base + REGION_DEBUG*REGION_SIZE + (i == CCNT ? PMCCNTRSR : PMEVCNTSR0 + 8*i));
+ value = readl(gator_events_ccn504_base + REGION_DEBUG*REGION_SIZE + (i == CCNT ? PMCCNTRSR : PMEVCNTSR0 + 8*i));
+ if (gator_events_ccn504_prev[i] != 0x80808080) {
+ gator_events_ccn504_buffer[len++] = gator_events_ccn504_key[i];
+ gator_events_ccn504_buffer[len++] = value - gator_events_ccn504_prev[i];
+ }
+ gator_events_ccn504_prev[i] = value;
// Are the counters registers cleared when read? Is that what the cntr_rst bit on the pmcr register does?
}
// Clear the PMU snapshot status
writel(1, gator_events_ccn504_base + REGION_DEBUG*REGION_SIZE + PMSR_CLR);
- return len;
-}
-
-static void __maybe_unused gator_events_ccn504_enumerate(int pos, int size)
-{
- int i;
- u32 oly_id;
+ if (buffer)
+ *buffer = gator_events_ccn504_buffer;
- for (i = pos; i < pos + size; ++i) {
- oly_id = readl(gator_events_ccn504_base + i*REGION_SIZE + OLY_ID);
- printk(KERN_ERR "%s(%s:%i) %i %08x\n", __FUNCTION__, __FILE__, __LINE__, i, oly_id);
- }
+ return len;
}
static struct gator_interface gator_events_ccn504_interface = {
gator_events_ccn504_base = ioremap(ccn504_addr, NUM_REGIONS*REGION_SIZE);
if (gator_events_ccn504_base == NULL) {
- printk(KERN_ERR "%s(%s:%i) ioremap returned NULL\n", __FUNCTION__, __FILE__, __LINE__);
+ printk(KERN_ERR "gator: ioremap returned NULL\n");
return -1;
}
- //printk(KERN_ERR "%s(%s:%i)\n", __FUNCTION__, __FILE__, __LINE__);
-
- // Test - can memory be read
- {
- //gator_events_ccn504_enumerate(0, NUM_REGIONS);
-
-#if 0
- // DT
- gator_events_ccn504_enumerate(1, 1);
- // HN-F
- gator_events_ccn504_enumerate(32, 8);
- // XP
- gator_events_ccn504_enumerate(64, 11);
- // RN-I
- gator_events_ccn504_enumerate(128, 1);
- gator_events_ccn504_enumerate(130, 1);
- gator_events_ccn504_enumerate(134, 1);
- gator_events_ccn504_enumerate(140, 1);
- gator_events_ccn504_enumerate(144, 1);
- gator_events_ccn504_enumerate(148, 1);
- // SBAS
- gator_events_ccn504_enumerate(129, 1);
- gator_events_ccn504_enumerate(137, 1);
- gator_events_ccn504_enumerate(139, 1);
- gator_events_ccn504_enumerate(147, 1);
-#endif
- }
for (i = 0; i < CNTMAX; ++i) {
gator_events_ccn504_enabled[i] = 0;
return gator_events_install(&gator_events_ccn504_interface);
}
-
-gator_events_init(gator_events_ccn504_init);
projects / firefly-linux-kernel-4.4.55.git / blobdiff