first and last commit

platform/t8002/miu/miu.c

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+/*
+ * Copyright (C) 2013-2014 Apple Inc. All rights reserved.
+ *
+ * This document is the property of Apple 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 Inc.
+ */
+#include <arch.h>
+#include <debug.h>
+#include <drivers/miu.h>
+#include <platform.h>
+#include <platform/memmap.h>
+#include <platform/miu.h>
+#include <platform/soc/chipid.h>
+#include <platform/soc/miu.h>
+#include <platform/soc/pmgr.h>
+#include <platform/clocks.h>
+#include <platform/soc/hwclocks.h>
+#include <platform/timer.h>
+
+int miu_initialize_internal_ram(void)
+{
+#if APPLICATION_SECUREROM
+	// Ensure that rPMGR_SCRATCH0-3 get cleared
+	rPMGR_SCRATCH0 = 0;
+	rPMGR_SCRATCH1 = 0;
+	rPMGR_SCRATCH2 = 0;
+	rPMGR_SCRATCH3 = 0;
+#endif /* APPLICATION_SECUREROM */
+
+	// Save the Security Epoch in the top byte of PMGR_SCRATCH0
+	rPMGR_SCRATCH0 &= ~0xFF000000;
+	rPMGR_SCRATCH0 |= (platform_get_security_epoch()) << 24;
+
+	return 0;
+}
+
+int miu_init(void)
+{
+#if APPLICATION_IBOOT && !PRODUCT_IBEC
+	// Verify that the Security Epoch in PMGR_SCRATCH0 matches
+	if ((rPMGR_SCRATCH0 >> 24) != platform_get_security_epoch()) {
+		panic("miu_init: Epoch Mismatch\n");
+	}
+#endif
+
+	return 0;
+}
+
+void miu_suspend(void)
+{
+	/* nothing required for suspend */
+}
+
+int miu_initialize_dram(bool resume)
+{
+#if APPLICATION_IBOOT && WITH_HW_DCS
+	mcu_initialize_dram(resume);
+#endif
+	return 0;
+}
+
+void miu_select_remap(enum remap_select sel)
+{
+	/*
+	The ROMADDRREMAP[1:0] is responsible for the remap
+
+	1. ROMADDRREMAP[1] = 1’b0 - ROM mapped to PIO  
+	1.1. ROMADDRREMAP[0] = 1’b0 -  ROM mapped to SECURE ROM 
+	1.2. ROMADDRREMAP[0] = 1’b1 -  ROM mapped to AOP-SRAM 
+	2. ROMADDRREMAP[1] = 1’b1 - ROM mapped to DRAM
+
+	in other words
+	ROMADDRREMAP[1:0] 
+	2’b00 - SECURE ROM
+	2’b01 - AOP-SRAM
+	2’b1x - DDR
+	*/
+
+	switch (sel) {
+		case REMAP_SRAM:
+			rPIO_REMAP_CTL = (rPIO_REMAP_CTL & ~3) | (1 << 0);
+			break;
+
+		case REMAP_SDRAM:
+			rPIO_REMAP_CTL = (rPIO_REMAP_CTL & ~3) | (2 << 0);
+			break;
+
+		// reset back to default behavior
+		default:
+			rPIO_REMAP_CTL = 0;
+			break;
+	}
+}
+
+void miu_bypass_prep(void)
+{
+}
+
+#if WITH_DEVICETREE
+
+void miu_update_device_tree(DTNode *pmgr_node)
+{
+	// Nothing to do here
+}
+
+#endif

platform/t8002/miu/rules.mk

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+# Copyright (C) 2013 Apple Inc. All rights reserved.
+#
+# This document is the property of Apple 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 Inc.
+#
+LOCAL_DIR := $(GET_LOCAL_DIR)
+
+OPTIONS += \
+	WITH_HW_MIU=1
+
+ALL_OBJS += $(LOCAL_DIR)/miu.o