/* * Copyright 2014, Michael Ellerman, IBM Corp. * Licensed under GPLv2. */ #include #include #include #include #include #include "trace.h" struct trace_buffer *trace_buffer_allocate(u64 size) { struct trace_buffer *tb; if (size < sizeof(*tb)) { fprintf(stderr, "Error: trace buffer too small\n"); return NULL; } tb = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); if (tb == MAP_FAILED) { perror("mmap"); return NULL; } tb->size = size; tb->tail = tb->data; tb->overflow = false; return tb; } static bool trace_check_bounds(struct trace_buffer *tb, void *p) { return p < ((void *)tb + tb->size); } static bool trace_check_alloc(struct trace_buffer *tb, void *p) { /* * If we ever overflowed don't allow any more input. This prevents us * from dropping a large item and then later logging a small one. The * buffer should just stop when overflow happened, not be patchy. If * you're overflowing, make your buffer bigger. */ if (tb->overflow) return false; if (!trace_check_bounds(tb, p)) { tb->overflow = true; return false; } return true; } static void *trace_alloc(struct trace_buffer *tb, int bytes) { void *p, *newtail; p = tb->tail; newtail = tb->tail + bytes; if (!trace_check_alloc(tb, newtail)) return NULL; tb->tail = newtail; return p; } static struct trace_entry *trace_alloc_entry(struct trace_buffer *tb, int payload_size) { struct trace_entry *e; e = trace_alloc(tb, sizeof(*e) + payload_size); if (e) e->length = payload_size; return e; } int trace_log_reg(struct trace_buffer *tb, u64 reg, u64 value) { struct trace_entry *e; u64 *p; e = trace_alloc_entry(tb, sizeof(reg) + sizeof(value)); if (!e) return -ENOSPC; e->type = TRACE_TYPE_REG; p = (u64 *)e->data; *p++ = reg; *p++ = value; return 0; } int trace_log_counter(struct trace_buffer *tb, u64 value) { struct trace_entry *e; u64 *p; e = trace_alloc_entry(tb, sizeof(value)); if (!e) return -ENOSPC; e->type = TRACE_TYPE_COUNTER; p = (u64 *)e->data; *p++ = value; return 0; } int trace_log_string(struct trace_buffer *tb, char *str) { struct trace_entry *e; char *p; int len; len = strlen(str); /* We NULL terminate to make printing easier */ e = trace_alloc_entry(tb, len + 1); if (!e) return -ENOSPC; e->type = TRACE_TYPE_STRING; p = (char *)e->data; memcpy(p, str, len); p += len; *p = '\0'; return 0; } int trace_log_indent(struct trace_buffer *tb) { struct trace_entry *e; e = trace_alloc_entry(tb, 0); if (!e) return -ENOSPC; e->type = TRACE_TYPE_INDENT; return 0; } int trace_log_outdent(struct trace_buffer *tb) { struct trace_entry *e; e = trace_alloc_entry(tb, 0); if (!e) return -ENOSPC; e->type = TRACE_TYPE_OUTDENT; return 0; } static void trace_print_header(int seq, int prefix) { printf("%*s[%d]: ", prefix, "", seq); } static char *trace_decode_reg(int reg) { switch (reg) { case 769: return "SPRN_MMCR2"; break; case 770: return "SPRN_MMCRA"; break; case 779: return "SPRN_MMCR0"; break; case 804: return "SPRN_EBBHR"; break; case 805: return "SPRN_EBBRR"; break; case 806: return "SPRN_BESCR"; break; case 800: return "SPRN_BESCRS"; break; case 801: return "SPRN_BESCRSU"; break; case 802: return "SPRN_BESCRR"; break; case 803: return "SPRN_BESCRRU"; break; case 771: return "SPRN_PMC1"; break; case 772: return "SPRN_PMC2"; break; case 773: return "SPRN_PMC3"; break; case 774: return "SPRN_PMC4"; break; case 775: return "SPRN_PMC5"; break; case 776: return "SPRN_PMC6"; break; case 780: return "SPRN_SIAR"; break; case 781: return "SPRN_SDAR"; break; case 768: return "SPRN_SIER"; break; } return NULL; } static void trace_print_reg(struct trace_entry *e) { u64 *p, *reg, *value; char *name; p = (u64 *)e->data; reg = p++; value = p; name = trace_decode_reg(*reg); if (name) printf("register %-10s = 0x%016llx\n", name, *value); else printf("register %lld = 0x%016llx\n", *reg, *value); } static void trace_print_counter(struct trace_entry *e) { u64 *value; value = (u64 *)e->data; printf("counter = %lld\n", *value); } static void trace_print_string(struct trace_entry *e) { char *str; str = (char *)e->data; puts(str); } #define BASE_PREFIX 2 #define PREFIX_DELTA 8 static void trace_print_entry(struct trace_entry *e, int seq, int *prefix) { switch (e->type) { case TRACE_TYPE_REG: trace_print_header(seq, *prefix); trace_print_reg(e); break; case TRACE_TYPE_COUNTER: trace_print_header(seq, *prefix); trace_print_counter(e); break; case TRACE_TYPE_STRING: trace_print_header(seq, *prefix); trace_print_string(e); break; case TRACE_TYPE_INDENT: trace_print_header(seq, *prefix); puts("{"); *prefix += PREFIX_DELTA; break; case TRACE_TYPE_OUTDENT: *prefix -= PREFIX_DELTA; if (*prefix < BASE_PREFIX) *prefix = BASE_PREFIX; trace_print_header(seq, *prefix); puts("}"); break; default: trace_print_header(seq, *prefix); printf("entry @ %p type %d\n", e, e->type); break; } } void trace_buffer_print(struct trace_buffer *tb) { struct trace_entry *e; int i, prefix; void *p; printf("Trace buffer dump:\n"); printf(" address %p \n", tb); printf(" tail %p\n", tb->tail); printf(" size %llu\n", tb->size); printf(" overflow %s\n", tb->overflow ? "TRUE" : "false"); printf(" Content:\n"); p = tb->data; i = 0; prefix = BASE_PREFIX; while (trace_check_bounds(tb, p) && p < tb->tail) { e = p; trace_print_entry(e, i, &prefix); i++; p = (void *)e + sizeof(*e) + e->length; } } void trace_print_location(struct trace_buffer *tb) { printf("Trace buffer 0x%llx bytes @ %p\n", tb->size, tb); } > parenta5a1d1c2914b5316924c7893eb683a5420ebd3be (diff)
ktime: Get rid of the union
ktime is a union because the initial implementation stored the time in scalar nanoseconds on 64 bit machine and in a endianess optimized timespec variant for 32bit machines. The Y2038 cleanup removed the timespec variant and switched everything to scalar nanoseconds. The union remained, but become completely pointless. Get rid of the union and just keep ktime_t as simple typedef of type s64. The conversion was done with coccinelle and some manual mopping up. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org>
Diffstat (limited to 'include/dt-bindings/power/r8a7794-sysc.h')