first and last commit

lib/profile/profile.c

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+#include <lib/profile.h>
+#include <platform.h>
+#include <platform/memmap.h>
+#include <platform/timer.h>
+#include <string.h>
+
+#define MAX_PROFILE_ENTRIES ((PROFILE_BUF_SIZE - sizeof(struct profile_buffer)) / sizeof(struct profile_event))
+
+#if PRODUCT_IBSS || PRODUCT_LLB
+#if defined PROFILE_BUF_BASE
+static struct profile_buffer *profile_buffer = (struct profile_buffer *)PROFILE_BUF_BASE;
+#else
+#define PROFILE_BUF_SIZE	(0x400)
+union {
+	uint8_t	buffer[PROFILE_BUF_SIZE];
+	struct profile_buffer profile_buffer;
+} profile_union;
+static struct profile_buffer *profile_buffer = &profile_union.profile_buffer;
+#endif
+#else
+#define PROFILE_BUF_SIZE	PANIC_SIZE
+static struct profile_buffer *profile_buffer = (struct profile_buffer *)PANIC_BASE;
+#endif
+
+void profile_init(void)
+{
+#if PRODUCT_IBSS || PRODUCT_LLB
+	profile_buffer->magic = 'BTRC';
+	profile_buffer->count = 0;
+	profile_buffer->pc_bytes = sizeof(addr_t);
+	/* At startup this value isn't known. We'll fill it in at handoff
+	   at which time it should definitely be known */
+	profile_buffer->timer_ticks_per_sec = 0;
+#endif
+	PROFILE_1('INIT');
+}
+
+void profile(addr_t pc, uint32_t data1, uint32_t data2)
+{
+	struct profile_event *next_entry;
+	if (profile_buffer->count < MAX_PROFILE_ENTRIES) {
+		next_entry = &profile_buffer->events[profile_buffer->count++];
+		next_entry->time = timer_get_ticks();
+		next_entry->pc = pc;
+		next_entry->data1 = data1;
+		next_entry->data2 = data2;
+	};
+}
+
+extern uint32_t invalidate_time;
+
+void profile_handoff(void)
+{
+	PROFILE_ENTER('HOF');
+	if ((void *)profile_buffer != (void *)PANIC_BASE) {
+		size_t buffer_size;
+
+		profile_buffer->timer_ticks_per_sec = timer_get_tick_rate();
+		buffer_size = PROFILE_BUF_SIZE > PANIC_SIZE ? PANIC_SIZE : PROFILE_BUF_SIZE;
+
+		bcopy(profile_buffer, (void *)PANIC_BASE, buffer_size);
+		profile_buffer = (struct profile_buffer *)PANIC_BASE;
+	}
+	PROFILE_EXIT('HOF');
+}

lib/profile/rules.mk

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+# Copyright (C) 2012 Apple Computer, Inc. All rights reserved.
+#
+# This document is the property of Apple Computer, Inc.
+# It is considered confidential and proprietary.
+#
+# This document may not be reproduced or transmitted in any form,
+# in whole or in part, without the express written permission of
+# Apple Computer, Inc.
+#
+LOCAL_DIR := $(GET_LOCAL_DIR)
+
+# Don't allow the profiling system to be built in firmware built
+# by B&I. The boot profile trashes the panic buffer, which would
+# not be a good thing on firmware released to engineering or production
+ifneq ($(BUILDING_UNDER_XBS),)
+$(error Profiling system must not be included in B&I-built iBoots)
+endif
+
+OPTIONS += WITH_PROFILE=1
+
+ALL_OBJS += \
+	$(LOCAL_DIR)/profile.o