arch/arm/mach-omap2/omap3/board.c - u-boot-mtk - Git at Google

 // SPDX-License-Identifier: GPL-2.0+
 /*
  *
  * Common board functions for OMAP3 based boards.
  *
  * (C) Copyright 2004-2008
  * Texas Instruments, <www.ti.com>
  *
  * Author :
  *      Sunil Kumar <sunilsaini05@gmail.com>
  *      Shashi Ranjan <shashiranjanmca05@gmail.com>
  *
  * Derived from Beagle Board and 3430 SDP code by
  *      Richard Woodruff <r-woodruff2@ti.com>
  *      Syed Mohammed Khasim <khasim@ti.com>
  *
  */
 #include <common.h>
 #include <dm.h>
 #include <spl.h>
 #include <asm/io.h>
 #include <asm/arch/sys_proto.h>
 #include <asm/arch/mem.h>
 #include <asm/cache.h>
 #include <asm/armv7.h>
 #include <asm/gpio.h>
 #include <asm/omap_common.h>
 #include <linux/compiler.h>

 /* Declarations */
 extern omap3_sysinfo sysinfo;
 #ifndef CONFIG_SYS_L2CACHE_OFF
 static void omap3_invalidate_l2_cache_secure(void);
 #endif

 #ifdef CONFIG_DM_GPIO
 #if !CONFIG_IS_ENABLED(OF_CONTROL)
 /* Manually initialize GPIO banks when OF_CONTROL doesn't */
 static const struct omap_gpio_platdata omap34xx_gpio[] = {
 	{ 0, OMAP34XX_GPIO1_BASE },
 	{ 1, OMAP34XX_GPIO2_BASE },
 	{ 2, OMAP34XX_GPIO3_BASE },
 	{ 3, OMAP34XX_GPIO4_BASE },
 	{ 4, OMAP34XX_GPIO5_BASE },
 	{ 5, OMAP34XX_GPIO6_BASE },
 };

 U_BOOT_DEVICES(omap34xx_gpios) = {
 	{ "gpio_omap", &omap34xx_gpio[0] },
 	{ "gpio_omap", &omap34xx_gpio[1] },
 	{ "gpio_omap", &omap34xx_gpio[2] },
 	{ "gpio_omap", &omap34xx_gpio[3] },
 	{ "gpio_omap", &omap34xx_gpio[4] },
 	{ "gpio_omap", &omap34xx_gpio[5] },
 };
 #endif
 #else

 static const struct gpio_bank gpio_bank_34xx[6] = {
 	{ (void *)OMAP34XX_GPIO1_BASE },
 	{ (void *)OMAP34XX_GPIO2_BASE },
 	{ (void *)OMAP34XX_GPIO3_BASE },
 	{ (void *)OMAP34XX_GPIO4_BASE },
 	{ (void *)OMAP34XX_GPIO5_BASE },
 	{ (void *)OMAP34XX_GPIO6_BASE },
 };

 const struct gpio_bank *const omap_gpio_bank = gpio_bank_34xx;

 #endif

 /******************************************************************************
  * Routine: secure_unlock
  * Description: Setup security registers for access
  *              (GP Device only)
  *****************************************************************************/
 void secure_unlock_mem(void)
 {
 	struct pm *pm_rt_ape_base = (struct pm *)PM_RT_APE_BASE_ADDR_ARM;
 	struct pm *pm_gpmc_base = (struct pm *)PM_GPMC_BASE_ADDR_ARM;
 	struct pm *pm_ocm_ram_base = (struct pm *)PM_OCM_RAM_BASE_ADDR_ARM;
 	struct pm *pm_iva2_base = (struct pm *)PM_IVA2_BASE_ADDR_ARM;
 	struct sms *sms_base = (struct sms *)OMAP34XX_SMS_BASE;

 	/* Protection Module Register Target APE (PM_RT) */
 	writel(UNLOCK_1, &pm_rt_ape_base->req_info_permission_1);
 	writel(UNLOCK_1, &pm_rt_ape_base->read_permission_0);
 	writel(UNLOCK_1, &pm_rt_ape_base->wirte_permission_0);
 	writel(UNLOCK_2, &pm_rt_ape_base->addr_match_1);

 	writel(UNLOCK_3, &pm_gpmc_base->req_info_permission_0);
 	writel(UNLOCK_3, &pm_gpmc_base->read_permission_0);
 	writel(UNLOCK_3, &pm_gpmc_base->wirte_permission_0);

 	writel(UNLOCK_3, &pm_ocm_ram_base->req_info_permission_0);
 	writel(UNLOCK_3, &pm_ocm_ram_base->read_permission_0);
 	writel(UNLOCK_3, &pm_ocm_ram_base->wirte_permission_0);
 	writel(UNLOCK_2, &pm_ocm_ram_base->addr_match_2);

 	/* IVA Changes */
 	writel(UNLOCK_3, &pm_iva2_base->req_info_permission_0);
 	writel(UNLOCK_3, &pm_iva2_base->read_permission_0);
 	writel(UNLOCK_3, &pm_iva2_base->wirte_permission_0);

 	/* SDRC region 0 public */
 	writel(UNLOCK_1, &sms_base->rg_att0);
 }

 /******************************************************************************
  * Routine: secureworld_exit()
  * Description: If chip is EMU and boot type is external
  *		configure secure registers and exit secure world
  *              general use.
  *****************************************************************************/
 void secureworld_exit(void)
 {
 	unsigned long i;

 	/* configure non-secure access control register */
 	__asm__ __volatile__("mrc p15, 0, %0, c1, c1, 2":"=r"(i));
 	/* enabling co-processor CP10 and CP11 accesses in NS world */
 	__asm__ __volatile__("orr %0, %0, #0xC00":"=r"(i));
 	/*
 	 * allow allocation of locked TLBs and L2 lines in NS world
 	 * allow use of PLE registers in NS world also
 	 */
 	__asm__ __volatile__("orr %0, %0, #0x70000":"=r"(i));
 	__asm__ __volatile__("mcr p15, 0, %0, c1, c1, 2":"=r"(i));

 	/* Enable ASA in ACR register */
 	__asm__ __volatile__("mrc p15, 0, %0, c1, c0, 1":"=r"(i));
 	__asm__ __volatile__("orr %0, %0, #0x10":"=r"(i));
 	__asm__ __volatile__("mcr p15, 0, %0, c1, c0, 1":"=r"(i));

 	/* Exiting secure world */
 	__asm__ __volatile__("mrc p15, 0, %0, c1, c1, 0":"=r"(i));
 	__asm__ __volatile__("orr %0, %0, #0x31":"=r"(i));
 	__asm__ __volatile__("mcr p15, 0, %0, c1, c1, 0":"=r"(i));
 }

 /******************************************************************************
  * Routine: try_unlock_sram()
  * Description: If chip is GP/EMU(special) type, unlock the SRAM for
  *              general use.
  *****************************************************************************/
 void try_unlock_memory(void)
 {
 	int mode;
 	int in_sdram = is_running_in_sdram();

 	/*
 	 * if GP device unlock device SRAM for general use
 	 * secure code breaks for Secure/Emulation device - HS/E/T
 	 */
 	mode = get_device_type();
 	if (mode == GP_DEVICE)
 		secure_unlock_mem();

 	/*
 	 * If device is EMU and boot is XIP external booting
 	 * Unlock firewalls and disable L2 and put chip
 	 * out of secure world
 	 *
 	 * Assuming memories are unlocked by the demon who put us in SDRAM
 	 */
 	if ((mode <= EMU_DEVICE) && (get_boot_type() == 0x1F)
 	    && (!in_sdram)) {
 		secure_unlock_mem();
 		secureworld_exit();
 	}

 	return;
 }

 void early_system_init(void)
 {
 	hw_data_init();
 }

 /******************************************************************************
  * Routine: s_init
  * Description: Does early system init of muxing and clocks.
  *              - Called path is with SRAM stack.
  *****************************************************************************/
 void s_init(void)
 {
 	watchdog_init();
 	early_system_init();

 	try_unlock_memory();

 #ifndef CONFIG_SYS_L2CACHE_OFF
 	/* Invalidate L2-cache from secure mode */
 	omap3_invalidate_l2_cache_secure();
 #endif

 	set_muxconf_regs();
 	sdelay(100);

 	prcm_init();

 	per_clocks_enable();

 #ifdef CONFIG_USB_EHCI_OMAP
 	ehci_clocks_enable();
 #endif
 }

 #ifdef CONFIG_SPL_BUILD
 void board_init_f(ulong dummy)
 {
 	early_system_init();
 	mem_init();
 	/*
 	* Save the boot parameters passed from romcode.
 	* We cannot delay the saving further than this,
 	* to prevent overwrites.
 	*/
 	save_omap_boot_params();
 }
 #endif

 /*
  * Routine: misc_init_r
  * Description: A basic misc_init_r that just displays the die ID
  */
 int __weak misc_init_r(void)
 {
 	omap_die_id_display();

 	return 0;
 }

 /******************************************************************************
  * Routine: wait_for_command_complete
  * Description: Wait for posting to finish on watchdog
  *****************************************************************************/
 static void wait_for_command_complete(struct watchdog *wd_base)
 {
 	int pending = 1;
 	do {
 		pending = readl(&wd_base->wwps);
 	} while (pending);
 }

 /******************************************************************************
  * Routine: watchdog_init
  * Description: Shut down watch dogs
  *****************************************************************************/
 void watchdog_init(void)
 {
 	struct watchdog *wd2_base = (struct watchdog *)WD2_BASE;
 	struct prcm *prcm_base = (struct prcm *)PRCM_BASE;

 	/*
 	 * There are 3 watch dogs WD1=Secure, WD2=MPU, WD3=IVA. WD1 is
 	 * either taken care of by ROM (HS/EMU) or not accessible (GP).
 	 * We need to take care of WD2-MPU or take a PRCM reset. WD3
 	 * should not be running and does not generate a PRCM reset.
 	 */

 	setbits_le32(&prcm_base->fclken_wkup, 0x20);
 	setbits_le32(&prcm_base->iclken_wkup, 0x20);
 	wait_on_value(ST_WDT2, 0x20, &prcm_base->idlest_wkup, 5);

 	writel(WD_UNLOCK1, &wd2_base->wspr);
 	wait_for_command_complete(wd2_base);
 	writel(WD_UNLOCK2, &wd2_base->wspr);
 }

 /******************************************************************************
  * Dummy function to handle errors for EABI incompatibility
  *****************************************************************************/
 void abort(void)
 {
 }

 #if defined(CONFIG_NAND_OMAP_GPMC) & !defined(CONFIG_SPL_BUILD)
 /******************************************************************************
  * OMAP3 specific command to switch between NAND HW and SW ecc
  *****************************************************************************/
 static int do_switch_ecc(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
 {
 	int hw, strength = 1;

 	if (argc < 2 || argc > 3)
 		goto usage;

 	if (strncmp(argv[1], "hw", 2) == 0) {
 		hw = 1;
 		if (argc == 3) {
 			if (strncmp(argv[2], "bch8", 4) == 0)
 				strength = 8;
 			else if (strncmp(argv[2], "bch16", 5) == 0)
 				strength = 16;
 			else if (strncmp(argv[2], "hamming", 7) != 0)
 				goto usage;
 		}
 	} else if (strncmp(argv[1], "sw", 2) == 0) {
 		hw = 0;
 		if (argc == 3) {
 			if (strncmp(argv[2], "bch8", 4) == 0)
 				strength = 8;
 			else if (strncmp(argv[2], "hamming", 7) != 0)
 				goto usage;
 		}
 	} else {
 		goto usage;
 	}

 	return -omap_nand_switch_ecc(hw, strength);

 usage:
 	printf ("Usage: nandecc %s\n", cmdtp->usage);
 	return 1;
 }

 U_BOOT_CMD(
 	nandecc, 3, 1,	do_switch_ecc,
 	"switch OMAP3 NAND ECC calculation algorithm",
 	"hw [hamming|bch8|bch16] - Switch between NAND hardware 1-bit hamming"
 	" and 8-bit/16-bit BCH\n"
 	"                           ecc calculation (second parameter may"
 	" be omitted).\n"
 	"nandecc sw               - Switch to NAND software ecc algorithm."
 );

 #endif /* CONFIG_NAND_OMAP_GPMC & !CONFIG_SPL_BUILD */

 #ifdef CONFIG_DISPLAY_BOARDINFO
 /**
  * Print board information
  */
 int checkboard (void)
 {
 	char *mem_s ;

 	if (is_mem_sdr())
 		mem_s = "mSDR";
 	else
 		mem_s = "LPDDR";

 	printf("%s + %s/%s\n", sysinfo.board_string, mem_s,
 			sysinfo.nand_string);

 	return 0;
 }
 #endif	/* CONFIG_DISPLAY_BOARDINFO */

 static void omap3_emu_romcode_call(u32 service_id, u32 *parameters)
 {
 	u32 i, num_params = *parameters;
 	u32 *sram_scratch_space = (u32 *)OMAP3_PUBLIC_SRAM_SCRATCH_AREA;

 	/*
 	 * copy the parameters to an un-cached area to avoid coherency
 	 * issues
 	 */
 	for (i = 0; i < num_params; i++) {
 		__raw_writel(*parameters, sram_scratch_space);
 		parameters++;
 		sram_scratch_space++;
 	}

 	/* Now make the PPA call */
 	do_omap3_emu_romcode_call(service_id, OMAP3_PUBLIC_SRAM_SCRATCH_AREA);
 }

 void __weak omap3_set_aux_cr_secure(u32 acr)
 {
 	struct emu_hal_params emu_romcode_params;

 	emu_romcode_params.num_params = 1;
 	emu_romcode_params.param1 = acr;
 	omap3_emu_romcode_call(OMAP3_EMU_HAL_API_WRITE_ACR,
 			       (u32 *)&emu_romcode_params);
 }

 void v7_arch_cp15_set_l2aux_ctrl(u32 l2auxctrl, u32 cpu_midr,
 				 u32 cpu_rev_comb, u32 cpu_variant,
 				 u32 cpu_rev)
 {
 	if (get_device_type() == GP_DEVICE)
 		omap_smc1(OMAP3_GP_ROMCODE_API_WRITE_L2ACR, l2auxctrl);

 	/* L2 Cache Auxiliary Control Register is not banked */
 }

 void v7_arch_cp15_set_acr(u32 acr, u32 cpu_midr, u32 cpu_rev_comb,
 			  u32 cpu_variant, u32 cpu_rev)
 {
 	/* Write ACR - affects secure banked bits */
 	if (get_device_type() == GP_DEVICE)
 		omap_smc1(OMAP3_GP_ROMCODE_API_WRITE_ACR, acr);
 	else
 		omap3_set_aux_cr_secure(acr);

 	/* Write ACR - affects non-secure banked bits - some erratas need it */
 	asm volatile ("mcr p15, 0, %0, c1, c0, 1" : : "r" (acr));
 }


 #ifndef CONFIG_SYS_L2CACHE_OFF
 static void omap3_update_aux_cr(u32 set_bits, u32 clear_bits)
 {
 	u32 acr;

 	/* Read ACR */
 	asm volatile ("mrc p15, 0, %0, c1, c0, 1" : "=r" (acr));
 	acr &= ~clear_bits;
 	acr |= set_bits;
 	v7_arch_cp15_set_acr(acr, 0, 0, 0, 0);

 }

 /* Invalidate the entire L2 cache from secure mode */
 static void omap3_invalidate_l2_cache_secure(void)
 {
 	if (get_device_type() == GP_DEVICE) {
 		omap_smc1(OMAP3_GP_ROMCODE_API_L2_INVAL, 0);
 	} else {
 		struct emu_hal_params emu_romcode_params;
 		emu_romcode_params.num_params = 1;
 		emu_romcode_params.param1 = 0;
 		omap3_emu_romcode_call(OMAP3_EMU_HAL_API_L2_INVAL,
 				       (u32 *)&emu_romcode_params);
 	}
 }

 void v7_outer_cache_enable(void)
 {

 	/*
 	 * Set L2EN
 	 * On some revisions L2EN bit is banked on some revisions it's not
 	 * No harm in setting both banked bits(in fact this is required
 	 * by an erratum)
 	 */
 	omap3_update_aux_cr(0x2, 0);
 }

 void omap3_outer_cache_disable(void)
 {
 	/*
 	 * Clear L2EN
 	 * On some revisions L2EN bit is banked on some revisions it's not
 	 * No harm in clearing both banked bits(in fact this is required
 	 * by an erratum)
 	 */
 	omap3_update_aux_cr(0, 0x2);
 }
 #endif /* !CONFIG_SYS_L2CACHE_OFF */
	// SPDX-License-Identifier: GPL-2.0+
	/*
	*
	* Common board functions for OMAP3 based boards.
	*
	* (C) Copyright 2004-2008
	* Texas Instruments, <www.ti.com>
	*
	* Author :
	* Sunil Kumar <sunilsaini05@gmail.com>
	* Shashi Ranjan <shashiranjanmca05@gmail.com>
	*
	* Derived from Beagle Board and 3430 SDP code by
	* Richard Woodruff <r-woodruff2@ti.com>
	* Syed Mohammed Khasim <khasim@ti.com>
	*
	*/
	#include <common.h>
	#include <dm.h>
	#include <spl.h>
	#include <asm/io.h>
	#include <asm/arch/sys_proto.h>
	#include <asm/arch/mem.h>
	#include <asm/cache.h>
	#include <asm/armv7.h>
	#include <asm/gpio.h>
	#include <asm/omap_common.h>
	#include <linux/compiler.h>

	/* Declarations */
	extern omap3_sysinfo sysinfo;
	#ifndef CONFIG_SYS_L2CACHE_OFF
	static void omap3_invalidate_l2_cache_secure(void);
	#endif

	#ifdef CONFIG_DM_GPIO
	#if !CONFIG_IS_ENABLED(OF_CONTROL)
	/* Manually initialize GPIO banks when OF_CONTROL doesn't */
	static const struct omap_gpio_platdata omap34xx_gpio[] = {
	{ 0, OMAP34XX_GPIO1_BASE },
	{ 1, OMAP34XX_GPIO2_BASE },
	{ 2, OMAP34XX_GPIO3_BASE },
	{ 3, OMAP34XX_GPIO4_BASE },
	{ 4, OMAP34XX_GPIO5_BASE },
	{ 5, OMAP34XX_GPIO6_BASE },
	};

	U_BOOT_DEVICES(omap34xx_gpios) = {
	{ "gpio_omap", &omap34xx_gpio[0] },
	{ "gpio_omap", &omap34xx_gpio[1] },
	{ "gpio_omap", &omap34xx_gpio[2] },
	{ "gpio_omap", &omap34xx_gpio[3] },
	{ "gpio_omap", &omap34xx_gpio[4] },
	{ "gpio_omap", &omap34xx_gpio[5] },
	};
	#endif
	#else

	static const struct gpio_bank gpio_bank_34xx[6] = {
	{ (void *)OMAP34XX_GPIO1_BASE },
	{ (void *)OMAP34XX_GPIO2_BASE },
	{ (void *)OMAP34XX_GPIO3_BASE },
	{ (void *)OMAP34XX_GPIO4_BASE },
	{ (void *)OMAP34XX_GPIO5_BASE },
	{ (void *)OMAP34XX_GPIO6_BASE },
	};

	const struct gpio_bank *const omap_gpio_bank = gpio_bank_34xx;

	#endif

	/******************************************************************************
	* Routine: secure_unlock
	* Description: Setup security registers for access
	* (GP Device only)
	*****************************************************************************/
	void secure_unlock_mem(void)
	{
	struct pm pm_rt_ape_base = (struct pm )PM_RT_APE_BASE_ADDR_ARM;
	struct pm pm_gpmc_base = (struct pm )PM_GPMC_BASE_ADDR_ARM;
	struct pm pm_ocm_ram_base = (struct pm )PM_OCM_RAM_BASE_ADDR_ARM;
	struct pm pm_iva2_base = (struct pm )PM_IVA2_BASE_ADDR_ARM;
	struct sms sms_base = (struct sms )OMAP34XX_SMS_BASE;

	/* Protection Module Register Target APE (PM_RT) */
	writel(UNLOCK_1, &pm_rt_ape_base->req_info_permission_1);
	writel(UNLOCK_1, &pm_rt_ape_base->read_permission_0);
	writel(UNLOCK_1, &pm_rt_ape_base->wirte_permission_0);
	writel(UNLOCK_2, &pm_rt_ape_base->addr_match_1);

	writel(UNLOCK_3, &pm_gpmc_base->req_info_permission_0);
	writel(UNLOCK_3, &pm_gpmc_base->read_permission_0);
	writel(UNLOCK_3, &pm_gpmc_base->wirte_permission_0);

	writel(UNLOCK_3, &pm_ocm_ram_base->req_info_permission_0);
	writel(UNLOCK_3, &pm_ocm_ram_base->read_permission_0);
	writel(UNLOCK_3, &pm_ocm_ram_base->wirte_permission_0);
	writel(UNLOCK_2, &pm_ocm_ram_base->addr_match_2);

	/* IVA Changes */
	writel(UNLOCK_3, &pm_iva2_base->req_info_permission_0);
	writel(UNLOCK_3, &pm_iva2_base->read_permission_0);
	writel(UNLOCK_3, &pm_iva2_base->wirte_permission_0);

	/* SDRC region 0 public */
	writel(UNLOCK_1, &sms_base->rg_att0);
	}

	/******************************************************************************
	* Routine: secureworld_exit()
	* Description: If chip is EMU and boot type is external
	* configure secure registers and exit secure world
	* general use.
	*****************************************************************************/
	void secureworld_exit(void)
	{
	unsigned long i;

	/* configure non-secure access control register */
	__asm__ __volatile__("mrc p15, 0, %0, c1, c1, 2":"=r"(i));
	/* enabling co-processor CP10 and CP11 accesses in NS world */
	__asm__ __volatile__("orr %0, %0, #0xC00":"=r"(i));
	/*
	* allow allocation of locked TLBs and L2 lines in NS world
	* allow use of PLE registers in NS world also
	*/
	__asm__ __volatile__("orr %0, %0, #0x70000":"=r"(i));
	__asm__ __volatile__("mcr p15, 0, %0, c1, c1, 2":"=r"(i));

	/* Enable ASA in ACR register */
	__asm__ __volatile__("mrc p15, 0, %0, c1, c0, 1":"=r"(i));
	__asm__ __volatile__("orr %0, %0, #0x10":"=r"(i));
	__asm__ __volatile__("mcr p15, 0, %0, c1, c0, 1":"=r"(i));

	/* Exiting secure world */
	__asm__ __volatile__("mrc p15, 0, %0, c1, c1, 0":"=r"(i));
	__asm__ __volatile__("orr %0, %0, #0x31":"=r"(i));
	__asm__ __volatile__("mcr p15, 0, %0, c1, c1, 0":"=r"(i));
	}

	/******************************************************************************
	* Routine: try_unlock_sram()
	* Description: If chip is GP/EMU(special) type, unlock the SRAM for
	* general use.
	*****************************************************************************/
	void try_unlock_memory(void)
	{
	int mode;
	int in_sdram = is_running_in_sdram();

	/*
	* if GP device unlock device SRAM for general use
	* secure code breaks for Secure/Emulation device - HS/E/T
	*/
	mode = get_device_type();
	if (mode == GP_DEVICE)
	secure_unlock_mem();

	/*
	* If device is EMU and boot is XIP external booting
	* Unlock firewalls and disable L2 and put chip
	* out of secure world
	*
	* Assuming memories are unlocked by the demon who put us in SDRAM
	*/
	if ((mode <= EMU_DEVICE) && (get_boot_type() == 0x1F)
	&& (!in_sdram)) {
	secure_unlock_mem();
	secureworld_exit();
	}

	return;
	}

	void early_system_init(void)
	{
	hw_data_init();
	}

	/******************************************************************************
	* Routine: s_init
	* Description: Does early system init of muxing and clocks.
	* - Called path is with SRAM stack.
	*****************************************************************************/
	void s_init(void)
	{
	watchdog_init();
	early_system_init();

	try_unlock_memory();

	#ifndef CONFIG_SYS_L2CACHE_OFF
	/* Invalidate L2-cache from secure mode */
	omap3_invalidate_l2_cache_secure();
	#endif

	set_muxconf_regs();
	sdelay(100);

	prcm_init();

	per_clocks_enable();

	#ifdef CONFIG_USB_EHCI_OMAP
	ehci_clocks_enable();
	#endif
	}

	#ifdef CONFIG_SPL_BUILD
	void board_init_f(ulong dummy)
	{
	early_system_init();
	mem_init();
	/*
	* Save the boot parameters passed from romcode.
	* We cannot delay the saving further than this,
	* to prevent overwrites.
	*/
	save_omap_boot_params();
	}
	#endif

	/*
	* Routine: misc_init_r
	* Description: A basic misc_init_r that just displays the die ID
	*/
	int __weak misc_init_r(void)
	{
	omap_die_id_display();

	return 0;
	}

	/******************************************************************************
	* Routine: wait_for_command_complete
	* Description: Wait for posting to finish on watchdog
	*****************************************************************************/
	static void wait_for_command_complete(struct watchdog *wd_base)
	{
	int pending = 1;
	do {
	pending = readl(&wd_base->wwps);
	} while (pending);
	}

	/******************************************************************************
	* Routine: watchdog_init
	* Description: Shut down watch dogs
	*****************************************************************************/
	void watchdog_init(void)
	{
	struct watchdog wd2_base = (struct watchdog )WD2_BASE;
	struct prcm prcm_base = (struct prcm )PRCM_BASE;

	/*
	* There are 3 watch dogs WD1=Secure, WD2=MPU, WD3=IVA. WD1 is
	* either taken care of by ROM (HS/EMU) or not accessible (GP).
	* We need to take care of WD2-MPU or take a PRCM reset. WD3
	* should not be running and does not generate a PRCM reset.
	*/

	setbits_le32(&prcm_base->fclken_wkup, 0x20);
	setbits_le32(&prcm_base->iclken_wkup, 0x20);
	wait_on_value(ST_WDT2, 0x20, &prcm_base->idlest_wkup, 5);

	writel(WD_UNLOCK1, &wd2_base->wspr);
	wait_for_command_complete(wd2_base);
	writel(WD_UNLOCK2, &wd2_base->wspr);
	}

	/******************************************************************************
	* Dummy function to handle errors for EABI incompatibility
	*****************************************************************************/
	void abort(void)
	{
	}

	#if defined(CONFIG_NAND_OMAP_GPMC) & !defined(CONFIG_SPL_BUILD)
	/******************************************************************************
	* OMAP3 specific command to switch between NAND HW and SW ecc
	*****************************************************************************/
	static int do_switch_ecc(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
	{
	int hw, strength = 1;

	if (argc < 2 \|\| argc > 3)
	goto usage;

	if (strncmp(argv[1], "hw", 2) == 0) {
	hw = 1;
	if (argc == 3) {
	if (strncmp(argv[2], "bch8", 4) == 0)
	strength = 8;
	else if (strncmp(argv[2], "bch16", 5) == 0)
	strength = 16;
	else if (strncmp(argv[2], "hamming", 7) != 0)
	goto usage;
	}
	} else if (strncmp(argv[1], "sw", 2) == 0) {
	hw = 0;
	if (argc == 3) {
	if (strncmp(argv[2], "bch8", 4) == 0)
	strength = 8;
	else if (strncmp(argv[2], "hamming", 7) != 0)
	goto usage;
	}
	} else {
	goto usage;
	}

	return -omap_nand_switch_ecc(hw, strength);

	usage:
	printf ("Usage: nandecc %s\n", cmdtp->usage);
	return 1;
	}

	U_BOOT_CMD(
	nandecc, 3, 1, do_switch_ecc,
	"switch OMAP3 NAND ECC calculation algorithm",
	"hw [hamming\|bch8\|bch16] - Switch between NAND hardware 1-bit hamming"
	" and 8-bit/16-bit BCH\n"
	" ecc calculation (second parameter may"
	" be omitted).\n"
	"nandecc sw - Switch to NAND software ecc algorithm."
	);

	#endif /* CONFIG_NAND_OMAP_GPMC & !CONFIG_SPL_BUILD */

	#ifdef CONFIG_DISPLAY_BOARDINFO
	/**
	* Print board information
	*/
	int checkboard (void)
	{
	char *mem_s ;

	if (is_mem_sdr())
	mem_s = "mSDR";
	else
	mem_s = "LPDDR";

	printf("%s + %s/%s\n", sysinfo.board_string, mem_s,
	sysinfo.nand_string);

	return 0;
	}
	#endif /* CONFIG_DISPLAY_BOARDINFO */

	static void omap3_emu_romcode_call(u32 service_id, u32 *parameters)
	{
	u32 i, num_params = *parameters;
	u32 sram_scratch_space = (u32 )OMAP3_PUBLIC_SRAM_SCRATCH_AREA;

	/*
	* copy the parameters to an un-cached area to avoid coherency
	* issues
	*/
	for (i = 0; i < num_params; i++) {
	__raw_writel(*parameters, sram_scratch_space);
	parameters++;
	sram_scratch_space++;
	}

	/* Now make the PPA call */
	do_omap3_emu_romcode_call(service_id, OMAP3_PUBLIC_SRAM_SCRATCH_AREA);
	}

	void __weak omap3_set_aux_cr_secure(u32 acr)
	{
	struct emu_hal_params emu_romcode_params;

	emu_romcode_params.num_params = 1;
	emu_romcode_params.param1 = acr;
	omap3_emu_romcode_call(OMAP3_EMU_HAL_API_WRITE_ACR,
	(u32 *)&emu_romcode_params);
	}

	void v7_arch_cp15_set_l2aux_ctrl(u32 l2auxctrl, u32 cpu_midr,
	u32 cpu_rev_comb, u32 cpu_variant,
	u32 cpu_rev)
	{
	if (get_device_type() == GP_DEVICE)
	omap_smc1(OMAP3_GP_ROMCODE_API_WRITE_L2ACR, l2auxctrl);

	/* L2 Cache Auxiliary Control Register is not banked */
	}

	void v7_arch_cp15_set_acr(u32 acr, u32 cpu_midr, u32 cpu_rev_comb,
	u32 cpu_variant, u32 cpu_rev)
	{
	/* Write ACR - affects secure banked bits */
	if (get_device_type() == GP_DEVICE)
	omap_smc1(OMAP3_GP_ROMCODE_API_WRITE_ACR, acr);
	else
	omap3_set_aux_cr_secure(acr);

	/* Write ACR - affects non-secure banked bits - some erratas need it */
	asm volatile ("mcr p15, 0, %0, c1, c0, 1" : : "r" (acr));
	}


	#ifndef CONFIG_SYS_L2CACHE_OFF
	static void omap3_update_aux_cr(u32 set_bits, u32 clear_bits)
	{
	u32 acr;

	/* Read ACR */
	asm volatile ("mrc p15, 0, %0, c1, c0, 1" : "=r" (acr));
	acr &= ~clear_bits;
	acr \|= set_bits;
	v7_arch_cp15_set_acr(acr, 0, 0, 0, 0);

	}

	/* Invalidate the entire L2 cache from secure mode */
	static void omap3_invalidate_l2_cache_secure(void)
	{
	if (get_device_type() == GP_DEVICE) {
	omap_smc1(OMAP3_GP_ROMCODE_API_L2_INVAL, 0);
	} else {
	struct emu_hal_params emu_romcode_params;
	emu_romcode_params.num_params = 1;
	emu_romcode_params.param1 = 0;
	omap3_emu_romcode_call(OMAP3_EMU_HAL_API_L2_INVAL,
	(u32 *)&emu_romcode_params);
	}
	}

	void v7_outer_cache_enable(void)
	{

	/*
	* Set L2EN
	* On some revisions L2EN bit is banked on some revisions it's not
	* No harm in setting both banked bits(in fact this is required
	* by an erratum)
	*/
	omap3_update_aux_cr(0x2, 0);
	}

	void omap3_outer_cache_disable(void)
	{
	/*
	* Clear L2EN
	* On some revisions L2EN bit is banked on some revisions it's not
	* No harm in clearing both banked bits(in fact this is required
	* by an erratum)
	*/
	omap3_update_aux_cr(0, 0x2);
	}
	#endif /* !CONFIG_SYS_L2CACHE_OFF */