drivers/marvell/ccu.c - filogic/atf - Gitiles

 /*
  * Copyright (C) 2018 Marvell International Ltd.
  *
  * SPDX-License-Identifier:     BSD-3-Clause
  * https://spdx.org/licenses
  */

 /* CCU unit device driver for Marvell AP807, AP807 and AP810 SoCs */

 #include <armada_common.h>
 #include <ccu.h>
 #include <debug.h>
 #include <mmio.h>
 #include <mvebu.h>
 #include <mvebu_def.h>

 #if LOG_LEVEL >= LOG_LEVEL_INFO
 #define DEBUG_ADDR_MAP
 #endif

 /* common defines */
 #define WIN_ENABLE_BIT			(0x1)
 /* Physical address of the base of the window = {AddrLow[19:0],20'h0} */
 #define ADDRESS_SHIFT			(20 - 4)
 #define ADDRESS_MASK			(0xFFFFFFF0)
 #define CCU_WIN_ALIGNMENT		(0x100000)

 #define IS_DRAM_TARGET(tgt)		((((tgt) == DRAM_0_TID) || \
 					((tgt) == DRAM_1_TID) || \
 					((tgt) == RAR_TID)) ? 1 : 0)

 /* For storage of CR, SCR, ALR, AHR abd GCR */
 static uint32_t ccu_regs_save[MVEBU_CCU_MAX_WINS * 4 + 1];

 #ifdef DEBUG_ADDR_MAP
 static void dump_ccu(int ap_index)
 {
 	uint32_t win_id, win_cr, alr, ahr;
 	uint8_t target_id;
 	uint64_t start, end;

 	/* Dump all AP windows */
 	printf("\tbank  target     start              end\n");
 	printf("\t----------------------------------------------------\n");
 	for (win_id = 0; win_id < MVEBU_CCU_MAX_WINS; win_id++) {
 		win_cr = mmio_read_32(CCU_WIN_CR_OFFSET(ap_index, win_id));
 		if (win_cr & WIN_ENABLE_BIT) {
 			target_id = (win_cr >> CCU_TARGET_ID_OFFSET) &
 				     CCU_TARGET_ID_MASK;
 			alr = mmio_read_32(CCU_WIN_ALR_OFFSET(ap_index,
 							      win_id));
 			ahr = mmio_read_32(CCU_WIN_AHR_OFFSET(ap_index,
 							      win_id));
 			start = ((uint64_t)alr << ADDRESS_SHIFT);
 			end = (((uint64_t)ahr + 0x10) << ADDRESS_SHIFT);
 			printf("\tccu    %02x     0x%016llx 0x%016llx\n",
 			       target_id, start, end);
 		}
 	}
 	win_cr = mmio_read_32(CCU_WIN_GCR_OFFSET(ap_index));
 	target_id = (win_cr >> CCU_GCR_TARGET_OFFSET) & CCU_GCR_TARGET_MASK;
 	printf("\tccu   GCR %d - all other transactions\n", target_id);
 }
 #endif

 void ccu_win_check(struct addr_map_win *win)
 {
 	/* check if address is aligned to 1M */
 	if (IS_NOT_ALIGN(win->base_addr, CCU_WIN_ALIGNMENT)) {
 		win->base_addr = ALIGN_UP(win->base_addr, CCU_WIN_ALIGNMENT);
 		NOTICE("%s: Align up the base address to 0x%llx\n",
 		       __func__, win->base_addr);
 	}

 	/* size parameter validity check */
 	if (IS_NOT_ALIGN(win->win_size, CCU_WIN_ALIGNMENT)) {
 		win->win_size = ALIGN_UP(win->win_size, CCU_WIN_ALIGNMENT);
 		NOTICE("%s: Aligning size to 0x%llx\n",
 		       __func__, win->win_size);
 	}
 }

 void ccu_enable_win(int ap_index, struct addr_map_win *win, uint32_t win_id)
 {
 	uint32_t ccu_win_reg;
 	uint32_t alr, ahr;
 	uint64_t end_addr;

 	if ((win_id == 0) || (win_id > MVEBU_CCU_MAX_WINS)) {
 		ERROR("Enabling wrong CCU window %d!\n", win_id);
 		return;
 	}

 	end_addr = (win->base_addr + win->win_size - 1);
 	alr = (uint32_t)((win->base_addr >> ADDRESS_SHIFT) & ADDRESS_MASK);
 	ahr = (uint32_t)((end_addr >> ADDRESS_SHIFT) & ADDRESS_MASK);

 	mmio_write_32(CCU_WIN_ALR_OFFSET(ap_index, win_id), alr);
 	mmio_write_32(CCU_WIN_AHR_OFFSET(ap_index, win_id), ahr);

 	ccu_win_reg = WIN_ENABLE_BIT;
 	ccu_win_reg |= (win->target_id & CCU_TARGET_ID_MASK)
 			<< CCU_TARGET_ID_OFFSET;
 	mmio_write_32(CCU_WIN_CR_OFFSET(ap_index, win_id), ccu_win_reg);
 }

 static void ccu_disable_win(int ap_index, uint32_t win_id)
 {
 	uint32_t win_reg;

 	if ((win_id == 0) || (win_id > MVEBU_CCU_MAX_WINS)) {
 		ERROR("Disabling wrong CCU window %d!\n", win_id);
 		return;
 	}

 	win_reg = mmio_read_32(CCU_WIN_CR_OFFSET(ap_index, win_id));
 	win_reg &= ~WIN_ENABLE_BIT;
 	mmio_write_32(CCU_WIN_CR_OFFSET(ap_index, win_id), win_reg);
 }

 /* Insert/Remove temporary window for using the out-of reset default
  * CPx base address to access the CP configuration space prior to
  * the further base address update in accordance with address mapping
  * design.
  *
  * NOTE: Use the same window array for insertion and removal of
  *       temporary windows.
  */
 void ccu_temp_win_insert(int ap_index, struct addr_map_win *win, int size)
 {
 	uint32_t win_id;

 	for (int i = 0; i < size; i++) {
 		win_id = MVEBU_CCU_MAX_WINS - 1 - i;
 		ccu_win_check(win);
 		ccu_enable_win(ap_index, win, win_id);
 		win++;
 	}
 }

 /*
  * NOTE: Use the same window array for insertion and removal of
  *       temporary windows.
  */
 void ccu_temp_win_remove(int ap_index, struct addr_map_win *win, int size)
 {
 	uint32_t win_id;

 	for (int i = 0; i < size; i++) {
 		uint64_t base;
 		uint32_t target;

 		win_id = MVEBU_CCU_MAX_WINS - 1 - i;

 		target = mmio_read_32(CCU_WIN_CR_OFFSET(ap_index, win_id));
 		target >>= CCU_TARGET_ID_OFFSET;
 		target &= CCU_TARGET_ID_MASK;

 		base = mmio_read_32(CCU_WIN_ALR_OFFSET(ap_index, win_id));
 		base <<= ADDRESS_SHIFT;

 		if ((win->target_id != target) || (win->base_addr != base)) {
 			ERROR("%s: Trying to remove bad window-%d!\n",
 			      __func__, win_id);
 			continue;
 		}
 		ccu_disable_win(ap_index, win_id);
 		win++;
 	}
 }

 /* Returns current DRAM window target (DRAM_0_TID, DRAM_1_TID, RAR_TID)
  * NOTE: Call only once for each AP.
  * The AP0 DRAM window is located at index 2 only at the BL31 execution start.
  * Then it relocated to index 1 for matching the rest of APs DRAM settings.
  * Calling this function after relocation will produce wrong results on AP0
  */
 static uint32_t ccu_dram_target_get(int ap_index)
 {
 	/* On BLE stage the AP0 DRAM window is opened by the BootROM at index 2.
 	 * All the rest of detected APs will use window at index 1.
 	 * The AP0 DRAM window is moved from index 2 to 1 during
 	 * init_ccu() execution.
 	 */
 	const uint32_t win_id = (ap_index == 0) ? 2 : 1;
 	uint32_t target;

 	target = mmio_read_32(CCU_WIN_CR_OFFSET(ap_index, win_id));
 	target >>= CCU_TARGET_ID_OFFSET;
 	target &= CCU_TARGET_ID_MASK;

 	return target;
 }

 void ccu_dram_target_set(int ap_index, uint32_t target)
 {
 	/* On BLE stage the AP0 DRAM window is opened by the BootROM at index 2.
 	 * All the rest of detected APs will use window at index 1.
 	 * The AP0 DRAM window is moved from index 2 to 1
 	 * during init_ccu() execution.
 	 */
 	const uint32_t win_id = (ap_index == 0) ? 2 : 1;
 	uint32_t dram_cr;

 	dram_cr = mmio_read_32(CCU_WIN_CR_OFFSET(ap_index, win_id));
 	dram_cr &= ~(CCU_TARGET_ID_MASK << CCU_TARGET_ID_OFFSET);
 	dram_cr |= (target & CCU_TARGET_ID_MASK) << CCU_TARGET_ID_OFFSET;
 	mmio_write_32(CCU_WIN_CR_OFFSET(ap_index, win_id), dram_cr);
 }

 /* Setup CCU DRAM window and enable it */
 void ccu_dram_win_config(int ap_index, struct addr_map_win *win)
 {
 #if IMAGE_BLE /* BLE */
 	/* On BLE stage the AP0 DRAM window is opened by the BootROM at index 2.
 	 * Since the BootROM is not accessing DRAM at BLE stage,
 	 * the DRAM window can be temporarely disabled.
 	 */
 	const uint32_t win_id = (ap_index == 0) ? 2 : 1;
 #else /* end of BLE */
 	/* At the ccu_init() execution stage, DRAM windows of all APs
 	 * are arranged at index 1.
 	 * The AP0 still has the old window BootROM DRAM at index 2, so
 	 * the window-1 can be safely disabled without breaking the DRAM access.
 	 */
 	const uint32_t win_id = 1;
 #endif

 	ccu_disable_win(ap_index, win_id);
 	/* enable write secure (and clear read secure) */
 	mmio_write_32(CCU_WIN_SCR_OFFSET(ap_index, win_id),
 		      CCU_WIN_ENA_WRITE_SECURE);
 	ccu_win_check(win);
 	ccu_enable_win(ap_index, win, win_id);
 }

 /* Save content of CCU window + GCR */
 static void ccu_save_win_range(int ap_id, int win_first,
 			       int win_last, uint32_t *buffer)
 {
 	int win_id, idx;
 	/* Save CCU */
 	for (idx = 0, win_id = win_first; win_id <= win_last; win_id++) {
 		buffer[idx++] = mmio_read_32(CCU_WIN_CR_OFFSET(ap_id, win_id));
 		buffer[idx++] = mmio_read_32(CCU_WIN_SCR_OFFSET(ap_id, win_id));
 		buffer[idx++] = mmio_read_32(CCU_WIN_ALR_OFFSET(ap_id, win_id));
 		buffer[idx++] = mmio_read_32(CCU_WIN_AHR_OFFSET(ap_id, win_id));
 	}
 	buffer[idx] = mmio_read_32(CCU_WIN_GCR_OFFSET(ap_id));
 }

 /* Restore content of CCU window + GCR */
 static void ccu_restore_win_range(int ap_id, int win_first,
 				  int win_last, uint32_t *buffer)
 {
 	int win_id, idx;
 	/* Restore CCU */
 	for (idx = 0, win_id = win_first; win_id <= win_last; win_id++) {
 		mmio_write_32(CCU_WIN_CR_OFFSET(ap_id, win_id),  buffer[idx++]);
 		mmio_write_32(CCU_WIN_SCR_OFFSET(ap_id, win_id), buffer[idx++]);
 		mmio_write_32(CCU_WIN_ALR_OFFSET(ap_id, win_id), buffer[idx++]);
 		mmio_write_32(CCU_WIN_AHR_OFFSET(ap_id, win_id), buffer[idx++]);
 	}
 	mmio_write_32(CCU_WIN_GCR_OFFSET(ap_id), buffer[idx]);
 }

 void ccu_save_win_all(int ap_id)
 {
 	ccu_save_win_range(ap_id, 0, MVEBU_CCU_MAX_WINS - 1, ccu_regs_save);
 }

 void ccu_restore_win_all(int ap_id)
 {
 	ccu_restore_win_range(ap_id, 0, MVEBU_CCU_MAX_WINS - 1, ccu_regs_save);
 }

 int init_ccu(int ap_index)
 {
 	struct addr_map_win *win, *dram_win;
 	uint32_t win_id, win_reg;
 	uint32_t win_count, array_id;
 	uint32_t dram_target;
 #if IMAGE_BLE
 	/* In BootROM context CCU Window-1
 	 * has SRAM_TID target and should not be disabled
 	 */
 	const uint32_t win_start = 2;
 #else
 	const uint32_t win_start = 1;
 #endif

 	INFO("Initializing CCU Address decoding\n");

 	/* Get the array of the windows and fill the map data */
 	marvell_get_ccu_memory_map(ap_index, &win, &win_count);
 	if (win_count <= 0) {
 		INFO("No windows configurations found\n");
 	} else if (win_count > (MVEBU_CCU_MAX_WINS - 1)) {
 		ERROR("CCU mem map array > than max available windows (%d)\n",
 		      MVEBU_CCU_MAX_WINS);
 		win_count = MVEBU_CCU_MAX_WINS;
 	}

 	/* Need to set GCR to DRAM before all CCU windows are disabled for
 	 * securing the normal access to DRAM location, which the ATF is running
 	 * from. Once all CCU windows are set, which have to include the
 	 * dedicated DRAM window as well, the GCR can be switched to the target
 	 * defined by the platform configuration.
 	 */
 	dram_target = ccu_dram_target_get(ap_index);
 	win_reg = (dram_target & CCU_GCR_TARGET_MASK) << CCU_GCR_TARGET_OFFSET;
 	mmio_write_32(CCU_WIN_GCR_OFFSET(ap_index), win_reg);

 	/* If the DRAM window was already configured at the BLE stage,
 	 * only the window target considered valid, the address range should be
 	 * updated according to the platform configuration.
 	 */
 	for (dram_win = win, array_id = 0; array_id < win_count;
 	     array_id++, dram_win++) {
 		if (IS_DRAM_TARGET(dram_win->target_id)) {
 			dram_win->target_id = dram_target;
 			break;
 		}
 	}

 	/* Disable all AP CCU windows
 	 * Window-0 is always bypassed since it already contains
 	 * data allowing the internal configuration space access
 	 */
 	for (win_id = win_start; win_id < MVEBU_CCU_MAX_WINS; win_id++) {
 		ccu_disable_win(ap_index, win_id);
 		/* enable write secure (and clear read secure) */
 		mmio_write_32(CCU_WIN_SCR_OFFSET(ap_index, win_id),
 			      CCU_WIN_ENA_WRITE_SECURE);
 	}

 	/* win_id is the index of the current ccu window
 	 * array_id is the index of the current memory map window entry
 	 */
 	for (win_id = win_start, array_id = 0;
 	    ((win_id < MVEBU_CCU_MAX_WINS) && (array_id < win_count));
 	    win_id++) {
 		ccu_win_check(win);
 		ccu_enable_win(ap_index, win, win_id);
 		win++;
 		array_id++;
 	}

 	/* Get & set the default target according to board topology */
 	win_reg = (marvell_get_ccu_gcr_target(ap_index) & CCU_GCR_TARGET_MASK)
 		   << CCU_GCR_TARGET_OFFSET;
 	mmio_write_32(CCU_WIN_GCR_OFFSET(ap_index), win_reg);

 #ifdef DEBUG_ADDR_MAP
 	dump_ccu(ap_index);
 #endif

 	INFO("Done CCU Address decoding Initializing\n");

 	return 0;
 }
	/*
	* Copyright (C) 2018 Marvell International Ltd.
	*
	* SPDX-License-Identifier: BSD-3-Clause
	* https://spdx.org/licenses
	*/

	/* CCU unit device driver for Marvell AP807, AP807 and AP810 SoCs */

	#include <armada_common.h>
	#include <ccu.h>
	#include <debug.h>
	#include <mmio.h>
	#include <mvebu.h>
	#include <mvebu_def.h>

	#if LOG_LEVEL >= LOG_LEVEL_INFO
	#define DEBUG_ADDR_MAP
	#endif

	/* common defines */
	#define WIN_ENABLE_BIT (0x1)
	/* Physical address of the base of the window = {AddrLow[19:0],20'h0} */
	#define ADDRESS_SHIFT (20 - 4)
	#define ADDRESS_MASK (0xFFFFFFF0)
	#define CCU_WIN_ALIGNMENT (0x100000)

	#define IS_DRAM_TARGET(tgt) ((((tgt) == DRAM_0_TID) \|\| \
	((tgt) == DRAM_1_TID) \|\| \
	((tgt) == RAR_TID)) ? 1 : 0)

	/* For storage of CR, SCR, ALR, AHR abd GCR */
	static uint32_t ccu_regs_save[MVEBU_CCU_MAX_WINS * 4 + 1];

	#ifdef DEBUG_ADDR_MAP
	static void dump_ccu(int ap_index)
	{
	uint32_t win_id, win_cr, alr, ahr;
	uint8_t target_id;
	uint64_t start, end;

	/* Dump all AP windows */
	printf("\tbank target start end\n");
	printf("\t----------------------------------------------------\n");
	for (win_id = 0; win_id < MVEBU_CCU_MAX_WINS; win_id++) {
	win_cr = mmio_read_32(CCU_WIN_CR_OFFSET(ap_index, win_id));
	if (win_cr & WIN_ENABLE_BIT) {
	target_id = (win_cr >> CCU_TARGET_ID_OFFSET) &
	CCU_TARGET_ID_MASK;
	alr = mmio_read_32(CCU_WIN_ALR_OFFSET(ap_index,
	win_id));
	ahr = mmio_read_32(CCU_WIN_AHR_OFFSET(ap_index,
	win_id));
	start = ((uint64_t)alr << ADDRESS_SHIFT);
	end = (((uint64_t)ahr + 0x10) << ADDRESS_SHIFT);
	printf("\tccu %02x 0x%016llx 0x%016llx\n",
	target_id, start, end);
	}
	}
	win_cr = mmio_read_32(CCU_WIN_GCR_OFFSET(ap_index));
	target_id = (win_cr >> CCU_GCR_TARGET_OFFSET) & CCU_GCR_TARGET_MASK;
	printf("\tccu GCR %d - all other transactions\n", target_id);
	}
	#endif

	void ccu_win_check(struct addr_map_win *win)
	{
	/* check if address is aligned to 1M */
	if (IS_NOT_ALIGN(win->base_addr, CCU_WIN_ALIGNMENT)) {
	win->base_addr = ALIGN_UP(win->base_addr, CCU_WIN_ALIGNMENT);
	NOTICE("%s: Align up the base address to 0x%llx\n",
	__func__, win->base_addr);
	}

	/* size parameter validity check */
	if (IS_NOT_ALIGN(win->win_size, CCU_WIN_ALIGNMENT)) {
	win->win_size = ALIGN_UP(win->win_size, CCU_WIN_ALIGNMENT);
	NOTICE("%s: Aligning size to 0x%llx\n",
	__func__, win->win_size);
	}
	}

	void ccu_enable_win(int ap_index, struct addr_map_win *win, uint32_t win_id)
	{
	uint32_t ccu_win_reg;
	uint32_t alr, ahr;
	uint64_t end_addr;

	if ((win_id == 0) \|\| (win_id > MVEBU_CCU_MAX_WINS)) {
	ERROR("Enabling wrong CCU window %d!\n", win_id);
	return;
	}

	end_addr = (win->base_addr + win->win_size - 1);
	alr = (uint32_t)((win->base_addr >> ADDRESS_SHIFT) & ADDRESS_MASK);
	ahr = (uint32_t)((end_addr >> ADDRESS_SHIFT) & ADDRESS_MASK);

	mmio_write_32(CCU_WIN_ALR_OFFSET(ap_index, win_id), alr);
	mmio_write_32(CCU_WIN_AHR_OFFSET(ap_index, win_id), ahr);

	ccu_win_reg = WIN_ENABLE_BIT;
	ccu_win_reg \|= (win->target_id & CCU_TARGET_ID_MASK)
	<< CCU_TARGET_ID_OFFSET;
	mmio_write_32(CCU_WIN_CR_OFFSET(ap_index, win_id), ccu_win_reg);
	}

	static void ccu_disable_win(int ap_index, uint32_t win_id)
	{
	uint32_t win_reg;

	if ((win_id == 0) \|\| (win_id > MVEBU_CCU_MAX_WINS)) {
	ERROR("Disabling wrong CCU window %d!\n", win_id);
	return;
	}

	win_reg = mmio_read_32(CCU_WIN_CR_OFFSET(ap_index, win_id));
	win_reg &= ~WIN_ENABLE_BIT;
	mmio_write_32(CCU_WIN_CR_OFFSET(ap_index, win_id), win_reg);
	}

	/* Insert/Remove temporary window for using the out-of reset default
	* CPx base address to access the CP configuration space prior to
	* the further base address update in accordance with address mapping
	* design.
	*
	* NOTE: Use the same window array for insertion and removal of
	* temporary windows.
	*/
	void ccu_temp_win_insert(int ap_index, struct addr_map_win *win, int size)
	{
	uint32_t win_id;

	for (int i = 0; i < size; i++) {
	win_id = MVEBU_CCU_MAX_WINS - 1 - i;
	ccu_win_check(win);
	ccu_enable_win(ap_index, win, win_id);
	win++;
	}
	}

	/*
	* NOTE: Use the same window array for insertion and removal of
	* temporary windows.
	*/
	void ccu_temp_win_remove(int ap_index, struct addr_map_win *win, int size)
	{
	uint32_t win_id;

	for (int i = 0; i < size; i++) {
	uint64_t base;
	uint32_t target;

	win_id = MVEBU_CCU_MAX_WINS - 1 - i;

	target = mmio_read_32(CCU_WIN_CR_OFFSET(ap_index, win_id));
	target >>= CCU_TARGET_ID_OFFSET;
	target &= CCU_TARGET_ID_MASK;

	base = mmio_read_32(CCU_WIN_ALR_OFFSET(ap_index, win_id));
	base <<= ADDRESS_SHIFT;

	if ((win->target_id != target) \|\| (win->base_addr != base)) {
	ERROR("%s: Trying to remove bad window-%d!\n",
	__func__, win_id);
	continue;
	}
	ccu_disable_win(ap_index, win_id);
	win++;
	}
	}

	/* Returns current DRAM window target (DRAM_0_TID, DRAM_1_TID, RAR_TID)
	* NOTE: Call only once for each AP.
	* The AP0 DRAM window is located at index 2 only at the BL31 execution start.
	* Then it relocated to index 1 for matching the rest of APs DRAM settings.
	* Calling this function after relocation will produce wrong results on AP0
	*/
	static uint32_t ccu_dram_target_get(int ap_index)
	{
	/* On BLE stage the AP0 DRAM window is opened by the BootROM at index 2.
	* All the rest of detected APs will use window at index 1.
	* The AP0 DRAM window is moved from index 2 to 1 during
	* init_ccu() execution.
	*/
	const uint32_t win_id = (ap_index == 0) ? 2 : 1;
	uint32_t target;

	target = mmio_read_32(CCU_WIN_CR_OFFSET(ap_index, win_id));
	target >>= CCU_TARGET_ID_OFFSET;
	target &= CCU_TARGET_ID_MASK;

	return target;
	}

	void ccu_dram_target_set(int ap_index, uint32_t target)
	{
	/* On BLE stage the AP0 DRAM window is opened by the BootROM at index 2.
	* All the rest of detected APs will use window at index 1.
	* The AP0 DRAM window is moved from index 2 to 1
	* during init_ccu() execution.
	*/
	const uint32_t win_id = (ap_index == 0) ? 2 : 1;
	uint32_t dram_cr;

	dram_cr = mmio_read_32(CCU_WIN_CR_OFFSET(ap_index, win_id));
	dram_cr &= ~(CCU_TARGET_ID_MASK << CCU_TARGET_ID_OFFSET);
	dram_cr \|= (target & CCU_TARGET_ID_MASK) << CCU_TARGET_ID_OFFSET;
	mmio_write_32(CCU_WIN_CR_OFFSET(ap_index, win_id), dram_cr);
	}

	/* Setup CCU DRAM window and enable it */
	void ccu_dram_win_config(int ap_index, struct addr_map_win *win)
	{
	#if IMAGE_BLE /* BLE */
	/* On BLE stage the AP0 DRAM window is opened by the BootROM at index 2.
	* Since the BootROM is not accessing DRAM at BLE stage,
	* the DRAM window can be temporarely disabled.
	*/
	const uint32_t win_id = (ap_index == 0) ? 2 : 1;
	#else /* end of BLE */
	/* At the ccu_init() execution stage, DRAM windows of all APs
	* are arranged at index 1.
	* The AP0 still has the old window BootROM DRAM at index 2, so
	* the window-1 can be safely disabled without breaking the DRAM access.
	*/
	const uint32_t win_id = 1;
	#endif

	ccu_disable_win(ap_index, win_id);
	/* enable write secure (and clear read secure) */
	mmio_write_32(CCU_WIN_SCR_OFFSET(ap_index, win_id),
	CCU_WIN_ENA_WRITE_SECURE);
	ccu_win_check(win);
	ccu_enable_win(ap_index, win, win_id);
	}

	/* Save content of CCU window + GCR */
	static void ccu_save_win_range(int ap_id, int win_first,
	int win_last, uint32_t *buffer)
	{
	int win_id, idx;
	/* Save CCU */
	for (idx = 0, win_id = win_first; win_id <= win_last; win_id++) {
	buffer[idx++] = mmio_read_32(CCU_WIN_CR_OFFSET(ap_id, win_id));
	buffer[idx++] = mmio_read_32(CCU_WIN_SCR_OFFSET(ap_id, win_id));
	buffer[idx++] = mmio_read_32(CCU_WIN_ALR_OFFSET(ap_id, win_id));
	buffer[idx++] = mmio_read_32(CCU_WIN_AHR_OFFSET(ap_id, win_id));
	}
	buffer[idx] = mmio_read_32(CCU_WIN_GCR_OFFSET(ap_id));
	}

	/* Restore content of CCU window + GCR */
	static void ccu_restore_win_range(int ap_id, int win_first,
	int win_last, uint32_t *buffer)
	{
	int win_id, idx;
	/* Restore CCU */
	for (idx = 0, win_id = win_first; win_id <= win_last; win_id++) {
	mmio_write_32(CCU_WIN_CR_OFFSET(ap_id, win_id), buffer[idx++]);
	mmio_write_32(CCU_WIN_SCR_OFFSET(ap_id, win_id), buffer[idx++]);
	mmio_write_32(CCU_WIN_ALR_OFFSET(ap_id, win_id), buffer[idx++]);
	mmio_write_32(CCU_WIN_AHR_OFFSET(ap_id, win_id), buffer[idx++]);
	}
	mmio_write_32(CCU_WIN_GCR_OFFSET(ap_id), buffer[idx]);
	}

	void ccu_save_win_all(int ap_id)
	{
	ccu_save_win_range(ap_id, 0, MVEBU_CCU_MAX_WINS - 1, ccu_regs_save);
	}

	void ccu_restore_win_all(int ap_id)
	{
	ccu_restore_win_range(ap_id, 0, MVEBU_CCU_MAX_WINS - 1, ccu_regs_save);
	}

	int init_ccu(int ap_index)
	{
	struct addr_map_win win, dram_win;
	uint32_t win_id, win_reg;
	uint32_t win_count, array_id;
	uint32_t dram_target;
	#if IMAGE_BLE
	/* In BootROM context CCU Window-1
	* has SRAM_TID target and should not be disabled
	*/
	const uint32_t win_start = 2;
	#else
	const uint32_t win_start = 1;
	#endif

	INFO("Initializing CCU Address decoding\n");

	/* Get the array of the windows and fill the map data */
	marvell_get_ccu_memory_map(ap_index, &win, &win_count);
	if (win_count <= 0) {
	INFO("No windows configurations found\n");
	} else if (win_count > (MVEBU_CCU_MAX_WINS - 1)) {
	ERROR("CCU mem map array > than max available windows (%d)\n",
	MVEBU_CCU_MAX_WINS);
	win_count = MVEBU_CCU_MAX_WINS;
	}

	/* Need to set GCR to DRAM before all CCU windows are disabled for
	* securing the normal access to DRAM location, which the ATF is running
	* from. Once all CCU windows are set, which have to include the
	* dedicated DRAM window as well, the GCR can be switched to the target
	* defined by the platform configuration.
	*/
	dram_target = ccu_dram_target_get(ap_index);
	win_reg = (dram_target & CCU_GCR_TARGET_MASK) << CCU_GCR_TARGET_OFFSET;
	mmio_write_32(CCU_WIN_GCR_OFFSET(ap_index), win_reg);

	/* If the DRAM window was already configured at the BLE stage,
	* only the window target considered valid, the address range should be
	* updated according to the platform configuration.
	*/
	for (dram_win = win, array_id = 0; array_id < win_count;
	array_id++, dram_win++) {
	if (IS_DRAM_TARGET(dram_win->target_id)) {
	dram_win->target_id = dram_target;
	break;
	}
	}

	/* Disable all AP CCU windows
	* Window-0 is always bypassed since it already contains
	* data allowing the internal configuration space access
	*/
	for (win_id = win_start; win_id < MVEBU_CCU_MAX_WINS; win_id++) {
	ccu_disable_win(ap_index, win_id);
	/* enable write secure (and clear read secure) */
	mmio_write_32(CCU_WIN_SCR_OFFSET(ap_index, win_id),
	CCU_WIN_ENA_WRITE_SECURE);
	}

	/* win_id is the index of the current ccu window
	* array_id is the index of the current memory map window entry
	*/
	for (win_id = win_start, array_id = 0;
	((win_id < MVEBU_CCU_MAX_WINS) && (array_id < win_count));
	win_id++) {
	ccu_win_check(win);
	ccu_enable_win(ap_index, win, win_id);
	win++;
	array_id++;
	}

	/* Get & set the default target according to board topology */
	win_reg = (marvell_get_ccu_gcr_target(ap_index) & CCU_GCR_TARGET_MASK)
	<< CCU_GCR_TARGET_OFFSET;
	mmio_write_32(CCU_WIN_GCR_OFFSET(ap_index), win_reg);

	#ifdef DEBUG_ADDR_MAP
	dump_ccu(ap_index);
	#endif

	INFO("Done CCU Address decoding Initializing\n");

	return 0;
	}