nxp_flexram.h

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/*
 * Copyright 2023-2024 NXP
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef ZEPHYR_INCLUDE_DRIVERS_MISC_FLEXRAM_NXP_FLEXRAM_H_
#define ZEPHYR_INCLUDE_DRIVERS_MISC_FLEXRAM_NXP_FLEXRAM_H_
 
#include <zephyr/devicetree.h>
#include <soc.h>

 
#define FLEXRAM_DT_NODE    DT_INST(0, nxp_flexram)
#define IOMUXC_GPR_DT_NODE DT_NODELABEL(iomuxcgpr)
 
#if defined(CONFIG_NXP_FLEXRAM_MAGIC_ADDR_API) || \
        defined(CONFIG_NXP_FLEXRAM_ERROR_INTERRUPT)
#define FLEXRAM_INTERRUPTS_USED
#endif
 
#if DT_PROP_HAS_IDX(FLEXRAM_DT_NODE, flexram_bank_spec, 0)
#define FLEXRAM_RUNTIME_BANKS_USED 1
#endif
 
#ifdef FLEXRAM_INTERRUPTS_USED
enum flexram_interrupt_cause {
#ifdef CONFIG_NXP_FLEXRAM_ERROR_INTERRUPT
        flexram_ocram_access_error,
        flexram_itcm_access_error,
        flexram_dtcm_access_error,
#endif
#ifdef CONFIG_NXP_FLEXRAM_MAGIC_ADDR_API
        flexram_ocram_magic_addr,
        flexram_itcm_magic_addr,
        flexram_dtcm_magic_addr,
#endif /* CONFIG_NXP_FLEXRAM_MAGIC_ADDR_API */
};
 
typedef void (*flexram_callback_t)(enum flexram_interrupt_cause, void *user_data);
 
void flexram_register_callback(flexram_callback_t callback, void *user_data);
#endif /* FLEXRAM_INTERRUPTS_USED */
 
#ifdef FLEXRAM_RUNTIME_BANKS_USED
 
/*
 * call from platform_init to set up flexram if using runtime map
 * must be inlined because cannot use stack
 */
#define GPR_FLEXRAM_REG_FILL(node_id, prop, idx) \
        (((uint32_t)DT_PROP_BY_IDX(node_id, prop, idx)) << (2 * idx))
static inline void flexram_dt_partition(void)
{
        /* iomuxc_gpr must be const (in ROM region) because used in reconfiguring ram */
        static IOMUXC_GPR_Type *const iomuxc_gpr =
                (IOMUXC_GPR_Type *)DT_REG_ADDR(IOMUXC_GPR_DT_NODE);
        /* do not create stack variables or use any data from ram in this function */
#if defined(CONFIG_SOC_SERIES_IMXRT11XX)
        iomuxc_gpr->GPR17 = (DT_FOREACH_PROP_ELEM_SEP(FLEXRAM_DT_NODE, flexram_bank_spec,
                                                GPR_FLEXRAM_REG_FILL, (+))) & 0xFFFF;
        iomuxc_gpr->GPR18 = (((DT_FOREACH_PROP_ELEM_SEP(FLEXRAM_DT_NODE, flexram_bank_spec,
                                                GPR_FLEXRAM_REG_FILL, (+)))) >> 16) & 0xFFFF;
#elif defined(CONFIG_SOC_SERIES_IMXRT10XX)
        iomuxc_gpr->GPR17 = DT_FOREACH_PROP_ELEM_SEP(FLEXRAM_DT_NODE, flexram_bank_spec,
                                                GPR_FLEXRAM_REG_FILL, (+));
#endif
        iomuxc_gpr->GPR16 |= IOMUXC_GPR_GPR16_FLEXRAM_BANK_CFG_SEL_MASK;
}
#endif /* FLEXRAM_RUNTIME_BANKS_USED */


int flexram_set_ocram_magic_addr(uint32_t ocram_addr);

int flexram_set_itcm_magic_addr(uint32_t itcm_addr);

int flexram_set_dtcm_magic_addr(uint32_t dtcm_addr);
 
#endif /* ZEPHYR_INCLUDE_DRIVERS_MISC_FLEXRAM_NXP_FLEXRAM_H_ */