diff options
Diffstat (limited to 'drivers/gator/driver/gator_events_armv6.c')
| -rw-r--r-- | drivers/gator/driver/gator_events_armv6.c | 244 |
1 files changed, 0 insertions, 244 deletions
diff --git a/drivers/gator/driver/gator_events_armv6.c b/drivers/gator/driver/gator_events_armv6.c deleted file mode 100644 index ef518987906..00000000000 --- a/drivers/gator/driver/gator_events_armv6.c +++ /dev/null @@ -1,244 +0,0 @@ -/** - * Copyright (C) ARM Limited 2010-2012. 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. - */ - -#include "gator.h" - -// gator_events_perf_pmu.c is used if perf is supported -#if GATOR_NO_PERF_SUPPORT - -static const char *pmnc_name; - -/* - * Per-CPU PMCR - */ -#define PMCR_E (1 << 0) /* Enable */ -#define PMCR_P (1 << 1) /* Count reset */ -#define PMCR_C (1 << 2) /* Cycle counter reset */ -#define PMCR_OFL_PMN0 (1 << 8) /* Count reg 0 overflow */ -#define PMCR_OFL_PMN1 (1 << 9) /* Count reg 1 overflow */ -#define PMCR_OFL_CCNT (1 << 10) /* Cycle counter overflow */ - -#define PMN0 0 -#define PMN1 1 -#define CCNT 2 -#define CNTMAX (CCNT+1) - -static int pmnc_counters = 0; -static unsigned long pmnc_enabled[CNTMAX]; -static unsigned long pmnc_event[CNTMAX]; -static unsigned long pmnc_key[CNTMAX]; - -static DEFINE_PER_CPU(int[CNTMAX], perfPrev); -static DEFINE_PER_CPU(int[CNTMAX * 2], perfCnt); - -static inline void armv6_pmnc_write(u32 val) -{ - /* upper 4bits and 7, 11 are write-as-0 */ - val &= 0x0ffff77f; - asm volatile("mcr p15, 0, %0, c15, c12, 0" : : "r" (val)); -} - -static inline u32 armv6_pmnc_read(void) -{ - u32 val; - asm volatile("mrc p15, 0, %0, c15, c12, 0" : "=r" (val)); - return val; -} - -static void armv6_pmnc_reset_counter(unsigned int cnt) -{ - u32 val = 0; - switch (cnt) { - case CCNT: - asm volatile("mcr p15, 0, %0, c15, c12, 1" : : "r" (val)); - break; - case PMN0: - asm volatile("mcr p15, 0, %0, c15, c12, 2" : : "r" (val)); - break; - case PMN1: - asm volatile("mcr p15, 0, %0, c15, c12, 3" : : "r" (val)); - break; - } -} - -int gator_events_armv6_create_files(struct super_block *sb, struct dentry *root) -{ - struct dentry *dir; - int i; - - pmnc_counters = 3; - - for (i = PMN0; i <= CCNT; i++) { - char buf[40]; - if (i == CCNT) { - snprintf(buf, sizeof buf, "ARM_%s_ccnt", pmnc_name); - } else { - snprintf(buf, sizeof buf, "ARM_%s_cnt%d", pmnc_name, i); - } - dir = gatorfs_mkdir(sb, root, buf); - if (!dir) { - return -1; - } - gatorfs_create_ulong(sb, dir, "enabled", &pmnc_enabled[i]); - gatorfs_create_ro_ulong(sb, dir, "key", &pmnc_key[i]); - if (i != CCNT) { - gatorfs_create_ulong(sb, dir, "event", &pmnc_event[i]); - } - } - - return 0; -} - -static int gator_events_armv6_online(int** buffer) -{ - unsigned int cnt, len = 0, cpu = smp_processor_id(); - u32 pmnc; - - if (armv6_pmnc_read() & PMCR_E) { - armv6_pmnc_write(armv6_pmnc_read() & ~PMCR_E); - } - - /* initialize PMNC, reset overflow, D bit, C bit and P bit. */ - armv6_pmnc_write(PMCR_OFL_PMN0 | PMCR_OFL_PMN1 | PMCR_OFL_CCNT | - PMCR_C | PMCR_P); - - /* configure control register */ - for (pmnc = 0, cnt = PMN0; cnt <= CCNT; cnt++) { - unsigned long event; - - per_cpu(perfPrev, cpu)[cnt] = 0; - - if (!pmnc_enabled[cnt]) - continue; - - event = pmnc_event[cnt] & 255; - - // Set event (if destined for PMNx counters) - if (cnt == PMN0) { - pmnc |= event << 20; - } else if (cnt == PMN1) { - pmnc |= event << 12; - } - - // Reset counter - armv6_pmnc_reset_counter(cnt); - } - armv6_pmnc_write(pmnc | PMCR_E); - - // return zero values, no need to read as the counters were just reset - for (cnt = PMN0; cnt <= CCNT; cnt++) { - if (pmnc_enabled[cnt]) { - per_cpu(perfCnt, cpu)[len++] = pmnc_key[cnt]; - per_cpu(perfCnt, cpu)[len++] = 0; - } - } - - if (buffer) - *buffer = per_cpu(perfCnt, cpu); - - return len; -} - -static int gator_events_armv6_offline(int** buffer) -{ - unsigned int cnt; - - armv6_pmnc_write(armv6_pmnc_read() & ~PMCR_E); - for (cnt = PMN0; cnt <= CCNT; cnt++) { - armv6_pmnc_reset_counter(cnt); - } - - return 0; -} - -static void gator_events_armv6_stop(void) -{ - unsigned int cnt; - - for (cnt = PMN0; cnt <= CCNT; cnt++) { - pmnc_enabled[cnt] = 0; - pmnc_event[cnt] = 0; - } -} - -static int gator_events_armv6_read(int **buffer) -{ - int cnt, len = 0; - int cpu = smp_processor_id(); - - for (cnt = PMN0; cnt <= CCNT; cnt++) { - if (pmnc_enabled[cnt]) { - u32 value = 0; - switch (cnt) { - case CCNT: - asm volatile("mrc p15, 0, %0, c15, c12, 1" : "=r" (value)); - break; - case PMN0: - asm volatile("mrc p15, 0, %0, c15, c12, 2" : "=r" (value)); - break; - case PMN1: - asm volatile("mrc p15, 0, %0, c15, c12, 3" : "=r" (value)); - break; - } - armv6_pmnc_reset_counter(cnt); - if (value != per_cpu(perfPrev, cpu)[cnt]) { - per_cpu(perfPrev, cpu)[cnt] = value; - per_cpu(perfCnt, cpu)[len++] = pmnc_key[cnt]; - per_cpu(perfCnt, cpu)[len++] = value; - } - } - } - - if (buffer) - *buffer = per_cpu(perfCnt, cpu); - - return len; -} - -static struct gator_interface gator_events_armv6_interface = { - .create_files = gator_events_armv6_create_files, - .stop = gator_events_armv6_stop, - .online = gator_events_armv6_online, - .offline = gator_events_armv6_offline, - .read = gator_events_armv6_read, -}; - -int gator_events_armv6_init(void) -{ - unsigned int cnt; - - switch (gator_cpuid()) { - case ARM1136: - case ARM1156: - case ARM1176: - pmnc_name = "ARM11"; - break; - case ARM11MPCORE: - pmnc_name = "ARM11MPCore"; - break; - default: - return -1; - } - - for (cnt = PMN0; cnt <= CCNT; cnt++) { - pmnc_enabled[cnt] = 0; - pmnc_event[cnt] = 0; - pmnc_key[cnt] = gator_events_get_key(); - } - - return gator_events_install(&gator_events_armv6_interface); -} - -gator_events_init(gator_events_armv6_init); - -#else -int gator_events_armv6_init(void) -{ - return -1; -} -#endif |