plat/imx/imx8qx/imx8qx_bl31_setup.c - filogic/atf - Gitiles

 /*
  * Copyright (c) 2015-2024, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */

 #include <assert.h>
 #include <inttypes.h>
 #include <stdbool.h>
 #include <stdint.h>

 #include <platform_def.h>

 #include <arch_helpers.h>
 #include <common/bl_common.h>
 #include <common/debug.h>
 #include <context.h>
 #include <drivers/arm/cci.h>
 #include <drivers/console.h>
 #include <lib/el3_runtime/context_mgmt.h>
 #include <lib/mmio.h>
 #include <lib/xlat_tables/xlat_tables_v2.h>
 #include <plat/common/platform.h>

 #include <imx8qx_pads.h>
 #include <imx8_iomux.h>
 #include <imx8_lpuart.h>
 #include <plat_imx8.h>
 #include <sci/sci.h>
 #include <sec_rsrc.h>

 static const unsigned long BL31_COHERENT_RAM_START	= BL_COHERENT_RAM_BASE;
 static const unsigned long BL31_COHERENT_RAM_END	= BL_COHERENT_RAM_END;
 static const unsigned long BL31_RO_START		= BL_CODE_BASE;
 static const unsigned long BL31_RO_END			= BL_CODE_END;
 static const unsigned long BL31_RW_END			= BL_END;

 IMPORT_SYM(unsigned long, __RW_START__, BL31_RW_START);

 static entry_point_info_t bl32_image_ep_info;
 static entry_point_info_t bl33_image_ep_info;

 /* Default configuration for i.MX8QM/QXP MEK */
 #if defined(IMX_USE_UART0)
 #define UART_PAD_CTRL	(PADRING_IFMUX_EN_MASK | PADRING_GP_EN_MASK | \
 			(SC_PAD_CONFIG_OUT_IN << PADRING_CONFIG_SHIFT) | \
 			(SC_PAD_ISO_OFF << PADRING_LPCONFIG_SHIFT) | \
 			(SC_PAD_28FDSOI_DSE_DV_LOW << PADRING_DSE_SHIFT) | \
 			(SC_PAD_28FDSOI_PS_PD << PADRING_PULL_SHIFT))
 #define IMX_RES_UART			SC_R_UART_0
 #define IMX_PAD_UART_RX			SC_P_UART0_RX
 #define IMX_PAD_UART_TX			SC_P_UART0_TX

 #elif defined(IMX_USE_UART1)
 #define UART_PAD_CTRL	(PADRING_IFMUX_EN_MASK | PADRING_GP_EN_MASK | \
 			(SC_PAD_CONFIG_OUT_IN << PADRING_CONFIG_SHIFT) | \
 			(SC_PAD_ISO_OFF << PADRING_LPCONFIG_SHIFT) | \
 			(SC_PAD_28FDSOI_DSE_DV_LOW << PADRING_DSE_SHIFT) | \
 			(SC_PAD_28FDSOI_PS_PD << PADRING_PULL_SHIFT))
 #define IMX_RES_UART			SC_R_UART_1
 #define IMX_PAD_UART_RX			SC_P_UART1_RX
 #define IMX_PAD_UART_TX			SC_P_UART1_TX

 /*
  * On Toradex Colibri i.MX8QXP UART3 on the FLEXCAN2.
  * Use custom pad control for this
  */
 #elif defined(IMX_USE_UART3)
 /*
  * FLEXCAN2_RX/TX pads are muxed to ADMA_UART3_RX/TX,
  * For ref:
  * 000b - ADMA_FLEXCAN2_RX
  * 001b - ADMA_SAI3_RXD
  * 010b - ADMA_UART3_RX
  * 011b - ADMA_SAI1_RXFS
  * 100b - LSIO_GPIO1_IO19
  */
 #define UART_PAD_CTRL	(PADRING_IFMUX_EN_MASK | PADRING_GP_EN_MASK | \
 			(SC_PAD_CONFIG_OUT_IN << PADRING_CONFIG_SHIFT) | \
 			(2U << PADRING_IFMUX_SHIFT) | \
 			(SC_PAD_ISO_OFF << PADRING_LPCONFIG_SHIFT) | \
 			(SC_PAD_28FDSOI_DSE_DV_LOW << PADRING_DSE_SHIFT) | \
 			(SC_PAD_28FDSOI_PS_PD << PADRING_PULL_SHIFT))
 #define IMX_RES_UART			SC_R_UART_3
 #define IMX_PAD_UART_RX			SC_P_FLEXCAN2_RX
 #define IMX_PAD_UART_TX			SC_P_FLEXCAN2_TX
 #else
 #error "Provide proper UART configuration in IMX_DEBUG_UART"
 #endif

 static const mmap_region_t imx_mmap[] = {
 	MAP_REGION_FLAT(IMX_REG_BASE, IMX_REG_SIZE, MT_DEVICE | MT_RW),
 	{0}
 };

 static uint32_t get_spsr_for_bl33_entry(void)
 {
 	unsigned long el_status;
 	unsigned long mode;
 	uint32_t spsr;

 	/* figure out what mode we enter the non-secure world */
 	el_status = read_id_aa64pfr0_el1() >> ID_AA64PFR0_EL2_SHIFT;
 	el_status &= ID_AA64PFR0_ELX_MASK;

 	mode = (el_status) ? MODE_EL2 : MODE_EL1;

 	spsr = SPSR_64(mode, MODE_SP_ELX, DISABLE_ALL_EXCEPTIONS);
 	return spsr;
 }

 #if DEBUG_CONSOLE_A35
 static void lpuart32_serial_setbrg(unsigned int base, int baudrate)
 {
 	unsigned int sbr, osr, baud_diff, tmp_osr, tmp_sbr;
 	unsigned int diff1, diff2, tmp, rate;

 	if (baudrate == 0)
 		panic();

 	sc_pm_get_clock_rate(ipc_handle, IMX_RES_UART, 2, &rate);

 	baud_diff = baudrate;
 	osr = 0;
 	sbr = 0;
 	for (tmp_osr = 4; tmp_osr <= 32; tmp_osr++) {
 		tmp_sbr = (rate / (baudrate * tmp_osr));
 		if (tmp_sbr == 0)
 			tmp_sbr = 1;

 		/* calculate difference in actual baud w/ current values */
 		diff1 = rate / (tmp_osr * tmp_sbr) - baudrate;
 		diff2 = rate / (tmp_osr * (tmp_sbr + 1));

 		/* select best values between sbr and sbr+1 */
 		if (diff1 > (baudrate - diff2)) {
 			diff1 = baudrate - diff2;
 			tmp_sbr++;
 		}

 		if (diff1 <= baud_diff) {
 			baud_diff = diff1;
 			osr = tmp_osr;
 			sbr = tmp_sbr;
 		}
 	}

 	tmp = mmio_read_32(IMX_BOOT_UART_BASE + BAUD);

 	if ((osr > 3) && (osr < 8))
 		tmp |= LPUART_BAUD_BOTHEDGE_MASK;

 	tmp &= ~LPUART_BAUD_OSR_MASK;
 	tmp |= LPUART_BAUD_OSR(osr - 1);
 	tmp &= ~LPUART_BAUD_SBR_MASK;
 	tmp |= LPUART_BAUD_SBR(sbr);

 	/* explicitly disable 10 bit mode & set 1 stop bit */
 	tmp &= ~(LPUART_BAUD_M10_MASK | LPUART_BAUD_SBNS_MASK);

 	mmio_write_32(IMX_BOOT_UART_BASE + BAUD, tmp);
 }

 static int lpuart32_serial_init(unsigned int base)
 {
 	unsigned int tmp;

 	/* disable TX & RX before enabling clocks */
 	tmp = mmio_read_32(IMX_BOOT_UART_BASE + CTRL);
 	tmp &= ~(CTRL_TE | CTRL_RE);
 	mmio_write_32(IMX_BOOT_UART_BASE + CTRL, tmp);

 	mmio_write_32(IMX_BOOT_UART_BASE + MODIR, 0);
 	mmio_write_32(IMX_BOOT_UART_BASE + FIFO, ~(FIFO_TXFE | FIFO_RXFE));

 	mmio_write_32(IMX_BOOT_UART_BASE + MATCH, 0);

 	/* provide data bits, parity, stop bit, etc */
 	lpuart32_serial_setbrg(base, IMX_BOOT_UART_BAUDRATE);

 	/* eight data bits no parity bit */
 	tmp = mmio_read_32(IMX_BOOT_UART_BASE + CTRL);
 	tmp &= ~(LPUART_CTRL_PE_MASK | LPUART_CTRL_PT_MASK | LPUART_CTRL_M_MASK);
 	mmio_write_32(IMX_BOOT_UART_BASE + CTRL, tmp);

 	mmio_write_32(IMX_BOOT_UART_BASE + CTRL, CTRL_RE | CTRL_TE);

 	mmio_write_32(IMX_BOOT_UART_BASE + DATA, 0x55);
 	mmio_write_32(IMX_BOOT_UART_BASE + DATA, 0x55);
 	mmio_write_32(IMX_BOOT_UART_BASE + DATA, 0x0A);

 	return 0;
 }
 #endif

 void imx8_partition_resources(void)
 {
 	sc_rm_pt_t secure_part, os_part;
 	sc_rm_mr_t mr, mr_record = 64;
 	sc_faddr_t start, end;
 	sc_err_t err;
 	bool owned;
 	int i;

 	err = sc_rm_get_partition(ipc_handle, &secure_part);
 	if (err)
 		ERROR("sc_rm_get_partition failed: %u\n", err);

 	err = sc_rm_partition_alloc(ipc_handle, &os_part, false, false,
 		false, false, false);
 	if (err)
 		ERROR("sc_rm_partition_alloc failed: %u\n", err);

 	err = sc_rm_set_parent(ipc_handle, os_part, secure_part);
 	if (err)
 		ERROR("sc_rm_set_parent: %u\n", err);

 	/* set secure resources to NOT-movable */
 	for (i = 0; i < (ARRAY_SIZE(secure_rsrcs)); i++) {
 		err = sc_rm_set_resource_movable(ipc_handle,
 			 secure_rsrcs[i], secure_rsrcs[i], false);
 		if (err)
 			ERROR("sc_rm_set_resource_movable: rsrc %u, ret %u\n",
 				secure_rsrcs[i], err);
 	}

 	/* move all movable resources and pins to non-secure partition */
 	err = sc_rm_move_all(ipc_handle, secure_part, os_part, true, true);
 	if (err)
 		ERROR("sc_rm_move_all: %u\n", err);

 	/* iterate through peripherals to give NS OS part access */
 	for (i = 0; i < ARRAY_SIZE(ns_access_allowed); i++) {
 		err = sc_rm_set_peripheral_permissions(ipc_handle,
 			ns_access_allowed[i], os_part, SC_RM_PERM_FULL);
 		if (err)
 			ERROR("sc_rm_set_peripheral_permissions: rsrc %u, \
 				ret %u\n", ns_access_allowed[i], err);
 	}

 	/*
 	 * sc_rm_set_peripheral_permissions
 	 * sc_rm_set_memreg_permissions
 	 * sc_rm_set_pin_movable
 	 */
 	for (mr = 0; mr < 64; mr++) {
 		owned = sc_rm_is_memreg_owned(ipc_handle, mr);
 		if (owned) {
 			err = sc_rm_get_memreg_info(ipc_handle, mr, &start, &end);
 			if (err)
 				ERROR("Memreg get info failed, %u\n", mr);

 			NOTICE("Memreg %u 0x%" PRIx64 " -- 0x%" PRIx64 "\n", mr, start, end);
 			if (BL31_BASE >= start && (BL31_LIMIT - 1) <= end) {
 				mr_record = mr; /* Record the mr for ATF running */
 			} else {
 				err = sc_rm_assign_memreg(ipc_handle, os_part, mr);
 				if (err)
 					ERROR("Memreg assign failed, 0x%" PRIx64 " -- 0x%" PRIx64 ", \
 					      err %d\n", start, end, err);
 			}
 		}
 	}

 	if (mr_record != 64) {
 		err = sc_rm_get_memreg_info(ipc_handle, mr_record, &start, &end);
 		if (err)
 			ERROR("Memreg get info failed, %u\n", mr_record);
 		if ((BL31_LIMIT - 1) < end) {
 			err = sc_rm_memreg_alloc(ipc_handle, &mr, BL31_LIMIT, end);
 			if (err)
 				ERROR("sc_rm_memreg_alloc failed, 0x%" PRIx64 " -- 0x%" PRIx64 "\n",
 				      (sc_faddr_t)BL31_LIMIT, end);
 			err = sc_rm_assign_memreg(ipc_handle, os_part, mr);
 			if (err)
 				ERROR("Memreg assign failed, 0x%" PRIx64 " -- 0x%" PRIx64 "\n",
 				      (sc_faddr_t)BL31_LIMIT, end);
 		}

 		if (start < (BL31_BASE - 1)) {
 			err = sc_rm_memreg_alloc(ipc_handle, &mr, start, BL31_BASE - 1);
 			if (err)
 				ERROR("sc_rm_memreg_alloc failed, 0x%" PRIx64 " -- 0x%" PRIx64 "\n",
 				      start, (sc_faddr_t)BL31_BASE - 1);
 			err = sc_rm_assign_memreg(ipc_handle, os_part, mr);
 			if (err)
 				ERROR("Memreg assign failed, 0x%" PRIx64 " -- 0x%" PRIx64 "\n",
 				      start, (sc_faddr_t)BL31_BASE - 1);
 		}
 	}

 	if (err)
 		NOTICE("Partitioning Failed\n");
 	else
 		NOTICE("Non-secure Partitioning Succeeded\n");
 }

 void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1,
 				u_register_t arg2, u_register_t arg3)
 {
 #if DEBUG_CONSOLE
 	static console_t console;
 #endif
 	if (sc_ipc_open(&ipc_handle, SC_IPC_BASE) != SC_ERR_NONE)
 		panic();

 #if DEBUG_CONSOLE_A35
 	sc_pm_set_resource_power_mode(ipc_handle, IMX_RES_UART,
 				      SC_PM_PW_MODE_ON);
 	sc_pm_clock_rate_t rate = 80000000;
 	sc_pm_set_clock_rate(ipc_handle, IMX_RES_UART, 2, &rate);
 	sc_pm_clock_enable(ipc_handle, IMX_RES_UART, 2, true, false);

 	/* Configure UART pads */
 	sc_pad_set(ipc_handle, IMX_PAD_UART_RX, UART_PAD_CTRL);
 	sc_pad_set(ipc_handle, IMX_PAD_UART_TX, UART_PAD_CTRL);
 	lpuart32_serial_init(IMX_BOOT_UART_BASE);
 #endif

 #if DEBUG_CONSOLE
 	console_lpuart_register(IMX_BOOT_UART_BASE, IMX_BOOT_UART_CLK_IN_HZ,
 		     IMX_CONSOLE_BAUDRATE, &console);
 #endif
 	/* Turn on MU1 for non-secure OS/Hypervisor */
 	sc_pm_set_resource_power_mode(ipc_handle, SC_R_MU_1A, SC_PM_PW_MODE_ON);

 	/* Turn on GPT_0's power & clock for non-secure OS/Hypervisor */
 	sc_pm_set_resource_power_mode(ipc_handle, SC_R_GPT_0, SC_PM_PW_MODE_ON);
 	sc_pm_clock_enable(ipc_handle, SC_R_GPT_0, SC_PM_CLK_PER, true, 0);
 	mmio_write_32(IMX_GPT0_LPCG_BASE, mmio_read_32(IMX_GPT0_LPCG_BASE) | (1 << 25));

 	/*
 	 * create new partition for non-secure OS/Hypervisor
 	 * uses global structs defined in sec_rsrc.h
 	 */
 	imx8_partition_resources();

 	bl33_image_ep_info.pc = PLAT_NS_IMAGE_OFFSET;
 	bl33_image_ep_info.spsr = get_spsr_for_bl33_entry();
 	SET_SECURITY_STATE(bl33_image_ep_info.h.attr, NON_SECURE);
 }

 void bl31_plat_arch_setup(void)
 {
 	unsigned long ro_start = BL31_RO_START;
 	unsigned long ro_size = BL31_RO_END - BL31_RO_START;
 	unsigned long rw_start = BL31_RW_START;
 	unsigned long rw_size = BL31_RW_END - BL31_RW_START;
 #if USE_COHERENT_MEM
 	unsigned long coh_start = BL31_COHERENT_RAM_START;
 	unsigned long coh_size = BL31_COHERENT_RAM_END - BL31_COHERENT_RAM_START;
 #endif

 	mmap_add_region(ro_start, ro_start, ro_size,
 		MT_RO | MT_MEMORY | MT_SECURE);
 	mmap_add_region(rw_start, rw_start, rw_size,
 		MT_RW | MT_MEMORY | MT_SECURE);
 	mmap_add(imx_mmap);

 #if USE_COHERENT_MEM
 	mmap_add_region(coh_start, coh_start, coh_size,
 			MT_DEVICE | MT_RW | MT_SECURE);
 #endif

 	init_xlat_tables();
 	enable_mmu_el3(0);
 }

 void bl31_platform_setup(void)
 {
 	plat_gic_driver_init();
 	plat_gic_init();
 }

 entry_point_info_t *bl31_plat_get_next_image_ep_info(unsigned int type)
 {
 	if (type == NON_SECURE)
 		return &bl33_image_ep_info;
 	if (type == SECURE)
 		return &bl32_image_ep_info;

 	return NULL;
 }

 unsigned int plat_get_syscnt_freq2(void)
 {
 	return COUNTER_FREQUENCY;
 }

 void bl31_plat_runtime_setup(void)
 {
 	console_flush();
 	console_switch_state(CONSOLE_FLAG_RUNTIME);
 }
	/*
	* Copyright (c) 2015-2024, ARM Limited and Contributors. All rights reserved.
	*
	* SPDX-License-Identifier: BSD-3-Clause
	*/

	#include <assert.h>
	#include <inttypes.h>
	#include <stdbool.h>
	#include <stdint.h>

	#include <platform_def.h>

	#include <arch_helpers.h>
	#include <common/bl_common.h>
	#include <common/debug.h>
	#include <context.h>
	#include <drivers/arm/cci.h>
	#include <drivers/console.h>
	#include <lib/el3_runtime/context_mgmt.h>
	#include <lib/mmio.h>
	#include <lib/xlat_tables/xlat_tables_v2.h>
	#include <plat/common/platform.h>

	#include <imx8qx_pads.h>
	#include <imx8_iomux.h>
	#include <imx8_lpuart.h>
	#include <plat_imx8.h>
	#include <sci/sci.h>
	#include <sec_rsrc.h>

	static const unsigned long BL31_COHERENT_RAM_START = BL_COHERENT_RAM_BASE;
	static const unsigned long BL31_COHERENT_RAM_END = BL_COHERENT_RAM_END;
	static const unsigned long BL31_RO_START = BL_CODE_BASE;
	static const unsigned long BL31_RO_END = BL_CODE_END;
	static const unsigned long BL31_RW_END = BL_END;

	IMPORT_SYM(unsigned long, __RW_START__, BL31_RW_START);

	static entry_point_info_t bl32_image_ep_info;
	static entry_point_info_t bl33_image_ep_info;

	/* Default configuration for i.MX8QM/QXP MEK */
	#if defined(IMX_USE_UART0)
	#define UART_PAD_CTRL (PADRING_IFMUX_EN_MASK \| PADRING_GP_EN_MASK \| \
	(SC_PAD_CONFIG_OUT_IN << PADRING_CONFIG_SHIFT) \| \
	(SC_PAD_ISO_OFF << PADRING_LPCONFIG_SHIFT) \| \
	(SC_PAD_28FDSOI_DSE_DV_LOW << PADRING_DSE_SHIFT) \| \
	(SC_PAD_28FDSOI_PS_PD << PADRING_PULL_SHIFT))
	#define IMX_RES_UART SC_R_UART_0
	#define IMX_PAD_UART_RX SC_P_UART0_RX
	#define IMX_PAD_UART_TX SC_P_UART0_TX

	#elif defined(IMX_USE_UART1)
	#define UART_PAD_CTRL (PADRING_IFMUX_EN_MASK \| PADRING_GP_EN_MASK \| \
	(SC_PAD_CONFIG_OUT_IN << PADRING_CONFIG_SHIFT) \| \
	(SC_PAD_ISO_OFF << PADRING_LPCONFIG_SHIFT) \| \
	(SC_PAD_28FDSOI_DSE_DV_LOW << PADRING_DSE_SHIFT) \| \
	(SC_PAD_28FDSOI_PS_PD << PADRING_PULL_SHIFT))
	#define IMX_RES_UART SC_R_UART_1
	#define IMX_PAD_UART_RX SC_P_UART1_RX
	#define IMX_PAD_UART_TX SC_P_UART1_TX

	/*
	* On Toradex Colibri i.MX8QXP UART3 on the FLEXCAN2.
	* Use custom pad control for this
	*/
	#elif defined(IMX_USE_UART3)
	/*
	* FLEXCAN2_RX/TX pads are muxed to ADMA_UART3_RX/TX,
	* For ref:
	* 000b - ADMA_FLEXCAN2_RX
	* 001b - ADMA_SAI3_RXD
	* 010b - ADMA_UART3_RX
	* 011b - ADMA_SAI1_RXFS
	* 100b - LSIO_GPIO1_IO19
	*/
	#define UART_PAD_CTRL (PADRING_IFMUX_EN_MASK \| PADRING_GP_EN_MASK \| \
	(SC_PAD_CONFIG_OUT_IN << PADRING_CONFIG_SHIFT) \| \
	(2U << PADRING_IFMUX_SHIFT) \| \
	(SC_PAD_ISO_OFF << PADRING_LPCONFIG_SHIFT) \| \
	(SC_PAD_28FDSOI_DSE_DV_LOW << PADRING_DSE_SHIFT) \| \
	(SC_PAD_28FDSOI_PS_PD << PADRING_PULL_SHIFT))
	#define IMX_RES_UART SC_R_UART_3
	#define IMX_PAD_UART_RX SC_P_FLEXCAN2_RX
	#define IMX_PAD_UART_TX SC_P_FLEXCAN2_TX
	#else
	#error "Provide proper UART configuration in IMX_DEBUG_UART"
	#endif

	static const mmap_region_t imx_mmap[] = {
	MAP_REGION_FLAT(IMX_REG_BASE, IMX_REG_SIZE, MT_DEVICE \| MT_RW),
	{0}
	};

	static uint32_t get_spsr_for_bl33_entry(void)
	{
	unsigned long el_status;
	unsigned long mode;
	uint32_t spsr;

	/* figure out what mode we enter the non-secure world */
	el_status = read_id_aa64pfr0_el1() >> ID_AA64PFR0_EL2_SHIFT;
	el_status &= ID_AA64PFR0_ELX_MASK;

	mode = (el_status) ? MODE_EL2 : MODE_EL1;

	spsr = SPSR_64(mode, MODE_SP_ELX, DISABLE_ALL_EXCEPTIONS);
	return spsr;
	}

	#if DEBUG_CONSOLE_A35
	static void lpuart32_serial_setbrg(unsigned int base, int baudrate)
	{
	unsigned int sbr, osr, baud_diff, tmp_osr, tmp_sbr;
	unsigned int diff1, diff2, tmp, rate;

	if (baudrate == 0)
	panic();

	sc_pm_get_clock_rate(ipc_handle, IMX_RES_UART, 2, &rate);

	baud_diff = baudrate;
	osr = 0;
	sbr = 0;
	for (tmp_osr = 4; tmp_osr <= 32; tmp_osr++) {
	tmp_sbr = (rate / (baudrate * tmp_osr));
	if (tmp_sbr == 0)
	tmp_sbr = 1;

	/* calculate difference in actual baud w/ current values */
	diff1 = rate / (tmp_osr * tmp_sbr) - baudrate;
	diff2 = rate / (tmp_osr * (tmp_sbr + 1));

	/* select best values between sbr and sbr+1 */
	if (diff1 > (baudrate - diff2)) {
	diff1 = baudrate - diff2;
	tmp_sbr++;
	}

	if (diff1 <= baud_diff) {
	baud_diff = diff1;
	osr = tmp_osr;
	sbr = tmp_sbr;
	}
	}

	tmp = mmio_read_32(IMX_BOOT_UART_BASE + BAUD);

	if ((osr > 3) && (osr < 8))
	tmp \|= LPUART_BAUD_BOTHEDGE_MASK;

	tmp &= ~LPUART_BAUD_OSR_MASK;
	tmp \|= LPUART_BAUD_OSR(osr - 1);
	tmp &= ~LPUART_BAUD_SBR_MASK;
	tmp \|= LPUART_BAUD_SBR(sbr);

	/* explicitly disable 10 bit mode & set 1 stop bit */
	tmp &= ~(LPUART_BAUD_M10_MASK \| LPUART_BAUD_SBNS_MASK);

	mmio_write_32(IMX_BOOT_UART_BASE + BAUD, tmp);
	}

	static int lpuart32_serial_init(unsigned int base)
	{
	unsigned int tmp;

	/* disable TX & RX before enabling clocks */
	tmp = mmio_read_32(IMX_BOOT_UART_BASE + CTRL);
	tmp &= ~(CTRL_TE \| CTRL_RE);
	mmio_write_32(IMX_BOOT_UART_BASE + CTRL, tmp);

	mmio_write_32(IMX_BOOT_UART_BASE + MODIR, 0);
	mmio_write_32(IMX_BOOT_UART_BASE + FIFO, ~(FIFO_TXFE \| FIFO_RXFE));

	mmio_write_32(IMX_BOOT_UART_BASE + MATCH, 0);

	/* provide data bits, parity, stop bit, etc */
	lpuart32_serial_setbrg(base, IMX_BOOT_UART_BAUDRATE);

	/* eight data bits no parity bit */
	tmp = mmio_read_32(IMX_BOOT_UART_BASE + CTRL);
	tmp &= ~(LPUART_CTRL_PE_MASK \| LPUART_CTRL_PT_MASK \| LPUART_CTRL_M_MASK);
	mmio_write_32(IMX_BOOT_UART_BASE + CTRL, tmp);

	mmio_write_32(IMX_BOOT_UART_BASE + CTRL, CTRL_RE \| CTRL_TE);

	mmio_write_32(IMX_BOOT_UART_BASE + DATA, 0x55);
	mmio_write_32(IMX_BOOT_UART_BASE + DATA, 0x55);
	mmio_write_32(IMX_BOOT_UART_BASE + DATA, 0x0A);

	return 0;
	}
	#endif

	void imx8_partition_resources(void)
	{
	sc_rm_pt_t secure_part, os_part;
	sc_rm_mr_t mr, mr_record = 64;
	sc_faddr_t start, end;
	sc_err_t err;
	bool owned;
	int i;

	err = sc_rm_get_partition(ipc_handle, &secure_part);
	if (err)
	ERROR("sc_rm_get_partition failed: %u\n", err);

	err = sc_rm_partition_alloc(ipc_handle, &os_part, false, false,
	false, false, false);
	if (err)
	ERROR("sc_rm_partition_alloc failed: %u\n", err);

	err = sc_rm_set_parent(ipc_handle, os_part, secure_part);
	if (err)
	ERROR("sc_rm_set_parent: %u\n", err);

	/* set secure resources to NOT-movable */
	for (i = 0; i < (ARRAY_SIZE(secure_rsrcs)); i++) {
	err = sc_rm_set_resource_movable(ipc_handle,
	secure_rsrcs[i], secure_rsrcs[i], false);
	if (err)
	ERROR("sc_rm_set_resource_movable: rsrc %u, ret %u\n",
	secure_rsrcs[i], err);
	}

	/* move all movable resources and pins to non-secure partition */
	err = sc_rm_move_all(ipc_handle, secure_part, os_part, true, true);
	if (err)
	ERROR("sc_rm_move_all: %u\n", err);

	/* iterate through peripherals to give NS OS part access */
	for (i = 0; i < ARRAY_SIZE(ns_access_allowed); i++) {
	err = sc_rm_set_peripheral_permissions(ipc_handle,
	ns_access_allowed[i], os_part, SC_RM_PERM_FULL);
	if (err)
	ERROR("sc_rm_set_peripheral_permissions: rsrc %u, \
	ret %u\n", ns_access_allowed[i], err);
	}

	/*
	* sc_rm_set_peripheral_permissions
	* sc_rm_set_memreg_permissions
	* sc_rm_set_pin_movable
	*/
	for (mr = 0; mr < 64; mr++) {
	owned = sc_rm_is_memreg_owned(ipc_handle, mr);
	if (owned) {
	err = sc_rm_get_memreg_info(ipc_handle, mr, &start, &end);
	if (err)
	ERROR("Memreg get info failed, %u\n", mr);

	NOTICE("Memreg %u 0x%" PRIx64 " -- 0x%" PRIx64 "\n", mr, start, end);
	if (BL31_BASE >= start && (BL31_LIMIT - 1) <= end) {
	mr_record = mr; /* Record the mr for ATF running */
	} else {
	err = sc_rm_assign_memreg(ipc_handle, os_part, mr);
	if (err)
	ERROR("Memreg assign failed, 0x%" PRIx64 " -- 0x%" PRIx64 ", \
	err %d\n", start, end, err);
	}
	}
	}

	if (mr_record != 64) {
	err = sc_rm_get_memreg_info(ipc_handle, mr_record, &start, &end);
	if (err)
	ERROR("Memreg get info failed, %u\n", mr_record);
	if ((BL31_LIMIT - 1) < end) {
	err = sc_rm_memreg_alloc(ipc_handle, &mr, BL31_LIMIT, end);
	if (err)
	ERROR("sc_rm_memreg_alloc failed, 0x%" PRIx64 " -- 0x%" PRIx64 "\n",
	(sc_faddr_t)BL31_LIMIT, end);
	err = sc_rm_assign_memreg(ipc_handle, os_part, mr);
	if (err)
	ERROR("Memreg assign failed, 0x%" PRIx64 " -- 0x%" PRIx64 "\n",
	(sc_faddr_t)BL31_LIMIT, end);
	}

	if (start < (BL31_BASE - 1)) {
	err = sc_rm_memreg_alloc(ipc_handle, &mr, start, BL31_BASE - 1);
	if (err)
	ERROR("sc_rm_memreg_alloc failed, 0x%" PRIx64 " -- 0x%" PRIx64 "\n",
	start, (sc_faddr_t)BL31_BASE - 1);
	err = sc_rm_assign_memreg(ipc_handle, os_part, mr);
	if (err)
	ERROR("Memreg assign failed, 0x%" PRIx64 " -- 0x%" PRIx64 "\n",
	start, (sc_faddr_t)BL31_BASE - 1);
	}
	}

	if (err)
	NOTICE("Partitioning Failed\n");
	else
	NOTICE("Non-secure Partitioning Succeeded\n");
	}

	void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1,
	u_register_t arg2, u_register_t arg3)
	{
	#if DEBUG_CONSOLE
	static console_t console;
	#endif
	if (sc_ipc_open(&ipc_handle, SC_IPC_BASE) != SC_ERR_NONE)
	panic();

	#if DEBUG_CONSOLE_A35
	sc_pm_set_resource_power_mode(ipc_handle, IMX_RES_UART,
	SC_PM_PW_MODE_ON);
	sc_pm_clock_rate_t rate = 80000000;
	sc_pm_set_clock_rate(ipc_handle, IMX_RES_UART, 2, &rate);
	sc_pm_clock_enable(ipc_handle, IMX_RES_UART, 2, true, false);

	/* Configure UART pads */
	sc_pad_set(ipc_handle, IMX_PAD_UART_RX, UART_PAD_CTRL);
	sc_pad_set(ipc_handle, IMX_PAD_UART_TX, UART_PAD_CTRL);
	lpuart32_serial_init(IMX_BOOT_UART_BASE);
	#endif

	#if DEBUG_CONSOLE
	console_lpuart_register(IMX_BOOT_UART_BASE, IMX_BOOT_UART_CLK_IN_HZ,
	IMX_CONSOLE_BAUDRATE, &console);
	#endif
	/* Turn on MU1 for non-secure OS/Hypervisor */
	sc_pm_set_resource_power_mode(ipc_handle, SC_R_MU_1A, SC_PM_PW_MODE_ON);

	/* Turn on GPT_0's power & clock for non-secure OS/Hypervisor */
	sc_pm_set_resource_power_mode(ipc_handle, SC_R_GPT_0, SC_PM_PW_MODE_ON);
	sc_pm_clock_enable(ipc_handle, SC_R_GPT_0, SC_PM_CLK_PER, true, 0);
	mmio_write_32(IMX_GPT0_LPCG_BASE, mmio_read_32(IMX_GPT0_LPCG_BASE) \| (1 << 25));

	/*
	* create new partition for non-secure OS/Hypervisor
	* uses global structs defined in sec_rsrc.h
	*/
	imx8_partition_resources();

	bl33_image_ep_info.pc = PLAT_NS_IMAGE_OFFSET;
	bl33_image_ep_info.spsr = get_spsr_for_bl33_entry();
	SET_SECURITY_STATE(bl33_image_ep_info.h.attr, NON_SECURE);
	}

	void bl31_plat_arch_setup(void)
	{
	unsigned long ro_start = BL31_RO_START;
	unsigned long ro_size = BL31_RO_END - BL31_RO_START;
	unsigned long rw_start = BL31_RW_START;
	unsigned long rw_size = BL31_RW_END - BL31_RW_START;
	#if USE_COHERENT_MEM
	unsigned long coh_start = BL31_COHERENT_RAM_START;
	unsigned long coh_size = BL31_COHERENT_RAM_END - BL31_COHERENT_RAM_START;
	#endif

	mmap_add_region(ro_start, ro_start, ro_size,
	MT_RO \| MT_MEMORY \| MT_SECURE);
	mmap_add_region(rw_start, rw_start, rw_size,
	MT_RW \| MT_MEMORY \| MT_SECURE);
	mmap_add(imx_mmap);

	#if USE_COHERENT_MEM
	mmap_add_region(coh_start, coh_start, coh_size,
	MT_DEVICE \| MT_RW \| MT_SECURE);
	#endif

	init_xlat_tables();
	enable_mmu_el3(0);
	}

	void bl31_platform_setup(void)
	{
	plat_gic_driver_init();
	plat_gic_init();
	}

	entry_point_info_t *bl31_plat_get_next_image_ep_info(unsigned int type)
	{
	if (type == NON_SECURE)
	return &bl33_image_ep_info;
	if (type == SECURE)
	return &bl32_image_ep_info;

	return NULL;
	}

	unsigned int plat_get_syscnt_freq2(void)
	{
	return COUNTER_FREQUENCY;
	}

	void bl31_plat_runtime_setup(void)
	{
	console_flush();
	console_switch_state(CONSOLE_FLAG_RUNTIME);
	}