diff options
Diffstat (limited to 'arch/arc/include')
| -rw-r--r-- | arch/arc/include/asm/arcregs.h | 14 | ||||
| -rw-r--r-- | arch/arc/include/asm/bitops.h | 31 | ||||
| -rw-r--r-- | arch/arc/include/asm/perf_event.h | 70 | ||||
| -rw-r--r-- | arch/arc/include/asm/processor.h | 14 | ||||
| -rw-r--r-- | arch/arc/include/asm/stacktrace.h | 37 | ||||
| -rw-r--r-- | arch/arc/include/asm/thread_info.h | 2 |
6 files changed, 104 insertions, 64 deletions
diff --git a/arch/arc/include/asm/arcregs.h b/arch/arc/include/asm/arcregs.h index be33db8a2ee3..e2b1b1211b0d 100644 --- a/arch/arc/include/asm/arcregs.h +++ b/arch/arc/include/asm/arcregs.h @@ -30,6 +30,7 @@ #define ARC_REG_D_UNCACH_BCR 0x6A #define ARC_REG_BPU_BCR 0xc0 #define ARC_REG_ISA_CFG_BCR 0xc1 +#define ARC_REG_RTT_BCR 0xF2 #define ARC_REG_SMART_BCR 0xFF /* status32 Bits Positions */ @@ -50,11 +51,7 @@ * [15: 8] = Exception Cause Code * [ 7: 0] = Exception Parameters (for certain types only) */ -#define ECR_VEC_MASK 0xff0000 -#define ECR_CODE_MASK 0x00ff00 -#define ECR_PARAM_MASK 0x0000ff - -/* Exception Cause Vector Values */ +#define ECR_V_MEM_ERR 0x01 #define ECR_V_INSN_ERR 0x02 #define ECR_V_MACH_CHK 0x20 #define ECR_V_ITLB_MISS 0x21 @@ -62,7 +59,8 @@ #define ECR_V_PROTV 0x23 #define ECR_V_TRAP 0x25 -/* Protection Violation Exception Cause Code Values */ +/* DTLB Miss and Protection Violation Cause Codes */ + #define ECR_C_PROTV_INST_FETCH 0x00 #define ECR_C_PROTV_LOAD 0x01 #define ECR_C_PROTV_STORE 0x02 @@ -173,11 +171,11 @@ } \ } -#define WRITE_BCR(reg, into) \ +#define WRITE_AUX(reg, into) \ { \ unsigned int tmp; \ if (sizeof(tmp) == sizeof(into)) { \ - tmp = (*(unsigned int *)(into)); \ + tmp = (*(unsigned int *)&(into)); \ write_aux_reg(reg, tmp); \ } else { \ extern void bogus_undefined(void); \ diff --git a/arch/arc/include/asm/bitops.h b/arch/arc/include/asm/bitops.h index 1a5bf07eefe2..4051e9525939 100644 --- a/arch/arc/include/asm/bitops.h +++ b/arch/arc/include/asm/bitops.h @@ -32,6 +32,20 @@ static inline void set_bit(unsigned long nr, volatile unsigned long *m) m += nr >> 5; + /* + * ARC ISA micro-optimization: + * + * Instructions dealing with bitpos only consider lower 5 bits (0-31) + * e.g (x << 33) is handled like (x << 1) by ASL instruction + * (mem pointer still needs adjustment to point to next word) + * + * Hence the masking to clamp @nr arg can be elided in general. + * + * However if @nr is a constant (above assumed it in a register), + * and greater than 31, gcc can optimize away (x << 33) to 0, + * as overflow, given the 32-bit ISA. Thus masking needs to be done + * for constant @nr, but no code is generated due to const prop. + */ if (__builtin_constant_p(nr)) nr &= 0x1f; @@ -374,29 +388,20 @@ __test_and_change_bit(unsigned long nr, volatile unsigned long *m) * This routine doesn't need to be atomic. */ static inline int -__constant_test_bit(unsigned int nr, const volatile unsigned long *addr) -{ - return ((1UL << (nr & 31)) & - (((const volatile unsigned int *)addr)[nr >> 5])) != 0; -} - -static inline int -__test_bit(unsigned int nr, const volatile unsigned long *addr) +test_bit(unsigned int nr, const volatile unsigned long *addr) { unsigned long mask; addr += nr >> 5; - /* ARC700 only considers 5 bits in bit-fiddling insn */ + if (__builtin_constant_p(nr)) + nr &= 0x1f; + mask = 1 << nr; return ((mask & *addr) != 0); } -#define test_bit(nr, addr) (__builtin_constant_p(nr) ? \ - __constant_test_bit((nr), (addr)) : \ - __test_bit((nr), (addr))) - /* * Count the number of zeros, starting from MSB * Helper for fls( ) friends diff --git a/arch/arc/include/asm/perf_event.h b/arch/arc/include/asm/perf_event.h index cbf755e32a03..2b8880e953a2 100644 --- a/arch/arc/include/asm/perf_event.h +++ b/arch/arc/include/asm/perf_event.h @@ -54,29 +54,13 @@ struct arc_reg_cc_build { #define PERF_COUNT_ARC_BPOK (PERF_COUNT_HW_MAX + 3) #define PERF_COUNT_ARC_EDTLB (PERF_COUNT_HW_MAX + 4) #define PERF_COUNT_ARC_EITLB (PERF_COUNT_HW_MAX + 5) -#define PERF_COUNT_ARC_HW_MAX (PERF_COUNT_HW_MAX + 6) +#define PERF_COUNT_ARC_LDC (PERF_COUNT_HW_MAX + 6) +#define PERF_COUNT_ARC_STC (PERF_COUNT_HW_MAX + 7) + +#define PERF_COUNT_ARC_HW_MAX (PERF_COUNT_HW_MAX + 8) /* - * The "generalized" performance events seem to really be a copy - * of the available events on x86 processors; the mapping to ARC - * events is not always possible 1-to-1. Fortunately, there doesn't - * seem to be an exact definition for these events, so we can cheat - * a bit where necessary. - * - * In particular, the following PERF events may behave a bit differently - * compared to other architectures: - * - * PERF_COUNT_HW_CPU_CYCLES - * Cycles not in halted state - * - * PERF_COUNT_HW_REF_CPU_CYCLES - * Reference cycles not in halted state, same as PERF_COUNT_HW_CPU_CYCLES - * for now as we don't do Dynamic Voltage/Frequency Scaling (yet) - * - * PERF_COUNT_HW_BUS_CYCLES - * Unclear what this means, Intel uses 0x013c, which according to - * their datasheet means "unhalted reference cycles". It sounds similar - * to PERF_COUNT_HW_REF_CPU_CYCLES, and we use the same counter for it. + * Some ARC pct quirks: * * PERF_COUNT_HW_STALLED_CYCLES_BACKEND * PERF_COUNT_HW_STALLED_CYCLES_FRONTEND @@ -91,21 +75,38 @@ struct arc_reg_cc_build { * Note that I$ cache misses aren't counted by either of the two! */ +/* + * ARC PCT has hardware conditions with fixed "names" but variable "indexes" + * (based on a specific RTL build) + * Below is the static map between perf generic/arc specific event_id and + * h/w condition names. + * At the time of probe, we loop thru each index and find it's name to + * complete the mapping of perf event_id to h/w index as latter is needed + * to program the counter really + */ static const char * const arc_pmu_ev_hw_map[] = { + /* count cycles */ [PERF_COUNT_HW_CPU_CYCLES] = "crun", [PERF_COUNT_HW_REF_CPU_CYCLES] = "crun", [PERF_COUNT_HW_BUS_CYCLES] = "crun", - [PERF_COUNT_HW_INSTRUCTIONS] = "iall", - [PERF_COUNT_HW_BRANCH_MISSES] = "bpfail", - [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = "ijmp", + [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = "bflush", [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = "bstall", - [PERF_COUNT_ARC_DCLM] = "dclm", - [PERF_COUNT_ARC_DCSM] = "dcsm", - [PERF_COUNT_ARC_ICM] = "icm", - [PERF_COUNT_ARC_BPOK] = "bpok", - [PERF_COUNT_ARC_EDTLB] = "edtlb", - [PERF_COUNT_ARC_EITLB] = "eitlb", + + /* counts condition */ + [PERF_COUNT_HW_INSTRUCTIONS] = "iall", + [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = "ijmp", + [PERF_COUNT_ARC_BPOK] = "bpok", /* NP-NT, PT-T, PNT-NT */ + [PERF_COUNT_HW_BRANCH_MISSES] = "bpfail", /* NP-T, PT-NT, PNT-T */ + + [PERF_COUNT_ARC_LDC] = "imemrdc", /* Instr: mem read cached */ + [PERF_COUNT_ARC_STC] = "imemwrc", /* Instr: mem write cached */ + + [PERF_COUNT_ARC_DCLM] = "dclm", /* D-cache Load Miss */ + [PERF_COUNT_ARC_DCSM] = "dcsm", /* D-cache Store Miss */ + [PERF_COUNT_ARC_ICM] = "icm", /* I-cache Miss */ + [PERF_COUNT_ARC_EDTLB] = "edtlb", /* D-TLB Miss */ + [PERF_COUNT_ARC_EITLB] = "eitlb", /* I-TLB Miss */ }; #define C(_x) PERF_COUNT_HW_CACHE_##_x @@ -114,11 +115,11 @@ static const char * const arc_pmu_ev_hw_map[] = { static const unsigned arc_pmu_cache_map[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = { [C(L1D)] = { [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_ACCESS)] = PERF_COUNT_ARC_LDC, [C(RESULT_MISS)] = PERF_COUNT_ARC_DCLM, }, [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_ACCESS)] = PERF_COUNT_ARC_STC, [C(RESULT_MISS)] = PERF_COUNT_ARC_DCSM, }, [C(OP_PREFETCH)] = { @@ -128,7 +129,7 @@ static const unsigned arc_pmu_cache_map[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = { }, [C(L1I)] = { [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_ACCESS)] = PERF_COUNT_HW_INSTRUCTIONS, [C(RESULT_MISS)] = PERF_COUNT_ARC_ICM, }, [C(OP_WRITE)] = { @@ -156,9 +157,10 @@ static const unsigned arc_pmu_cache_map[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = { }, [C(DTLB)] = { [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_ACCESS)] = PERF_COUNT_ARC_LDC, [C(RESULT_MISS)] = PERF_COUNT_ARC_EDTLB, }, + /* DTLB LD/ST Miss not segregated by h/w*/ [C(OP_WRITE)] = { [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, diff --git a/arch/arc/include/asm/processor.h b/arch/arc/include/asm/processor.h index 4e547296831d..52312cb5dbe2 100644 --- a/arch/arc/include/asm/processor.h +++ b/arch/arc/include/asm/processor.h @@ -47,9 +47,6 @@ struct thread_struct { /* Forward declaration, a strange C thing */ struct task_struct; -/* Return saved PC of a blocked thread */ -unsigned long thread_saved_pc(struct task_struct *t); - #define task_pt_regs(p) \ ((struct pt_regs *)(THREAD_SIZE + (void *)task_stack_page(p)) - 1) @@ -72,18 +69,21 @@ unsigned long thread_saved_pc(struct task_struct *t); #define release_segments(mm) do { } while (0) #define KSTK_EIP(tsk) (task_pt_regs(tsk)->ret) +#define KSTK_ESP(tsk) (task_pt_regs(tsk)->sp) /* * Where abouts of Task's sp, fp, blink when it was last seen in kernel mode. * Look in process.c for details of kernel stack layout */ -#define KSTK_ESP(tsk) (tsk->thread.ksp) +#define TSK_K_ESP(tsk) (tsk->thread.ksp) -#define KSTK_REG(tsk, off) (*((unsigned int *)(KSTK_ESP(tsk) + \ +#define TSK_K_REG(tsk, off) (*((unsigned int *)(TSK_K_ESP(tsk) + \ sizeof(struct callee_regs) + off))) -#define KSTK_BLINK(tsk) KSTK_REG(tsk, 4) -#define KSTK_FP(tsk) KSTK_REG(tsk, 0) +#define TSK_K_BLINK(tsk) TSK_K_REG(tsk, 4) +#define TSK_K_FP(tsk) TSK_K_REG(tsk, 0) + +#define thread_saved_pc(tsk) TSK_K_BLINK(tsk) extern void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long usp); diff --git a/arch/arc/include/asm/stacktrace.h b/arch/arc/include/asm/stacktrace.h new file mode 100644 index 000000000000..b29b6064ea14 --- /dev/null +++ b/arch/arc/include/asm/stacktrace.h @@ -0,0 +1,37 @@ +/* + * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com) + * Copyright (C) 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) + * + * 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 __ASM_STACKTRACE_H +#define __ASM_STACKTRACE_H + +#include <linux/sched.h> + +/** + * arc_unwind_core - Unwind the kernel mode stack for an execution context + * @tsk: NULL for current task, specific task otherwise + * @regs: pt_regs used to seed the unwinder {SP, FP, BLINK, PC} + * If NULL, use pt_regs of @tsk (if !NULL) otherwise + * use the current values of {SP, FP, BLINK, PC} + * @consumer_fn: Callback invoked for each frame unwound + * Returns 0 to continue unwinding, -1 to stop + * @arg: Arg to callback + * + * Returns the address of first function in stack + * + * Semantics: + * - synchronous unwinding (e.g. dump_stack): @tsk NULL, @regs NULL + * - Asynchronous unwinding of sleeping task: @tsk !NULL, @regs NULL + * - Asynchronous unwinding of intr/excp etc: @tsk !NULL, @regs !NULL + */ +notrace noinline unsigned int arc_unwind_core( + struct task_struct *tsk, struct pt_regs *regs, + int (*consumer_fn) (unsigned int, void *), + void *arg); + +#endif /* __ASM_STACKTRACE_H */ diff --git a/arch/arc/include/asm/thread_info.h b/arch/arc/include/asm/thread_info.h index 1163a1838ac1..aca0d5a45c7b 100644 --- a/arch/arc/include/asm/thread_info.h +++ b/arch/arc/include/asm/thread_info.h @@ -43,7 +43,6 @@ struct thread_info { int preempt_count; /* 0 => preemptable, <0 => BUG */ struct task_struct *task; /* main task structure */ mm_segment_t addr_limit; /* thread address space */ - struct exec_domain *exec_domain;/* execution domain */ __u32 cpu; /* current CPU */ unsigned long thr_ptr; /* TLS ptr */ }; @@ -56,7 +55,6 @@ struct thread_info { #define INIT_THREAD_INFO(tsk) \ { \ .task = &tsk, \ - .exec_domain = &default_exec_domain, \ .flags = 0, \ .cpu = 0, \ .preempt_count = INIT_PREEMPT_COUNT, \ |