/**
* Copyright (C) ARM Limited 2010-2014. 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.
*/
#ifndef GATOR_H_
#define GATOR_H_
#include <linux/version.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/list.h>
#define GATOR_PERF_SUPPORT LINUX_VERSION_CODE >= KERNEL_VERSION(3, 0, 0)
#define GATOR_PERF_PMU_SUPPORT GATOR_PERF_SUPPORT && defined(CONFIG_PERF_EVENTS) && (!(defined(__arm__) || defined(__aarch64__)) || defined(CONFIG_HW_PERF_EVENTS))
#define GATOR_NO_PERF_SUPPORT (!(GATOR_PERF_SUPPORT))
#define GATOR_CPU_FREQ_SUPPORT (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 38)) && defined(CONFIG_CPU_FREQ)
#define GATOR_IKS_SUPPORT defined(CONFIG_BL_SWITCHER)
// cpu ids
#define ARM1136 0xb36
#define ARM1156 0xb56
#define ARM1176 0xb76
#define ARM11MPCORE 0xb02
#define CORTEX_A5 0xc05
#define CORTEX_A7 0xc07
#define CORTEX_A8 0xc08
#define CORTEX_A9 0xc09
#define CORTEX_A12 0xc0d
#define CORTEX_A15 0xc0f
#define CORTEX_A17 0xc0e
#define SCORPION 0x00f
#define SCORPIONMP 0x02d
#define KRAITSIM 0x049
#define KRAIT 0x04d
#define KRAIT_S4_PRO 0x06f
#define CORTEX_A53 0xd03
#define CORTEX_A57 0xd07
#define AARCH64 0xd0f
#define OTHER 0xfff
#define MAXSIZE_CORE_NAME 32
struct gator_cpu {
const int cpuid;
// Human readable name
const char core_name[MAXSIZE_CORE_NAME];
// gatorfs event and Perf PMU name
const char * const pmnc_name;
// compatible from Documentation/devicetree/bindings/arm/cpus.txt
const char * const dt_name;
const int pmnc_counters;
};
const struct gator_cpu *gator_find_cpu_by_cpuid(const u32 cpuid);
const struct gator_cpu *gator_find_cpu_by_pmu_name(const char *const name);
/******************************************************************************
* Filesystem
******************************************************************************/
struct dentry *gatorfs_mkdir(struct super_block *sb, struct dentry *root,
char const *name);
int gatorfs_create_ulong(struct super_block *sb, struct dentry *root,
char const *name, unsigned long *val);
int gatorfs_create_ro_ulong(struct super_block *sb, struct dentry *root,
char const *name, unsigned long *val);
/******************************************************************************
* Tracepoints
******************************************************************************/
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 32)
# error Kernels prior to 2.6.32 not supported
#elif LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 35)
# define GATOR_DEFINE_PROBE(probe_name, proto) \
static void probe_##probe_name(PARAMS(proto))
# define GATOR_REGISTER_TRACE(probe_name) \
register_trace_##probe_name(probe_##probe_name)
# define GATOR_UNREGISTER_TRACE(probe_name) \
unregister_trace_##probe_name(probe_##probe_name)
#elif LINUX_VERSION_CODE < KERNEL_VERSION(3, 15, 0)
# define GATOR_DEFINE_PROBE(probe_name, proto) \
static void probe_##probe_name(void *data, PARAMS(proto))
# define GATOR_REGISTER_TRACE(probe_name) \
register_trace_##probe_name(probe_##probe_name, NULL)
# define GATOR_UNREGISTER_TRACE(probe_name) \
unregister_trace_##probe_name(probe_##probe_name, NULL)
#else
# define GATOR_DEFINE_PROBE(probe_name, proto) \
extern struct tracepoint *gator_tracepoint_##probe_name; \
static void probe_##probe_name(void *data, PARAMS(proto))
# define GATOR_REGISTER_TRACE(probe_name) \
tracepoint_probe_register(gator_tracepoint_##probe_name, probe_##probe_name, NULL)
# define GATOR_UNREGISTER_TRACE(probe_name) \
tracepoint_probe_unregister(gator_tracepoint_##probe_name, probe_##probe_name, NULL)
#endif
/******************************************************************************
* Events
******************************************************************************/
struct gator_interface {
void (*shutdown)(void); // Complementary function to init
int (*create_files)(struct super_block *sb, struct dentry *root);
int (*start)(void);
void (*stop)(void); // Complementary function to start
int (*online)(int **buffer, bool migrate);
int (*offline)(int **buffer, bool migrate);
void (*online_dispatch)(int cpu, bool migrate); // called in process context but may not be running on core 'cpu'
void (*offline_dispatch)(int cpu, bool migrate); // called in process context but may not be running on core 'cpu'
int (*read)(int **buffer);
int (*read64)(long long **buffer);
int (*read_proc)(long long **buffer, struct task_struct *);
struct list_head list;
};
int gator_events_install(struct gator_interface *interface);
int gator_events_get_key(void);
u32 gator_cpuid(void);
void gator_backtrace_handler(struct pt_regs *const regs);
#if !GATOR_IKS_SUPPORT
#define get_physical_cpu() smp_processor_id()
#define lcpu_to_pcpu(lcpu) lcpu
#define pcpu_to_lcpu(pcpu) pcpu
#else
#define get_physical_cpu() lcpu_to_pcpu(get_logical_cpu())
int lcpu_to_pcpu(const int lcpu);
int pcpu_to_lcpu(const int pcpu);
#endif
#define get_logical_cpu() smp_processor_id()
#define on_primary_core() (get_logical_cpu() == 0)
#endif // GATOR_H_
