enable CFG_TUD/THU_MEM_DCACHE_ENABLE for imxrt with M7 by default

7 files changed, 149 insertions, 136 deletions

diff --git a/hw/bsp/imxrt/boards/mimxrt1170_evkb/board/clock_config.c b/hw/bsp/imxrt/boards/mimxrt1170_evkb/board/clock_config.c
index 88b3b3770..66f1f983a 100644
--- a/hw/bsp/imxrt/boards/mimxrt1170_evkb/board/clock_config.c
+++ b/hw/bsp/imxrt/boards/mimxrt1170_evkb/board/clock_config.c
@@ -11,11 +11,11 @@
 
 /* TEXT BELOW IS USED AS SETTING FOR TOOLS *************************************
 !!GlobalInfo
-product: Clocks v12.0
+product: Clocks v14.0
 processor: MIMXRT1176xxxxx
 package_id: MIMXRT1176DVMAA
 mcu_data: ksdk2_0
-processor_version: 14.0.1
+processor_version: 16.3.0
 board: MIMXRT1170-EVKB
  * BE CAREFUL MODIFYING THIS COMMENT - IT IS YAML SETTINGS FOR TOOLS **********/
 
@@ -335,7 +335,6 @@ void BOARD_BootClockRUN(void)
 
     /* Init OSC RC 400M */
     CLOCK_OSC_EnableOscRc400M();
-    CLOCK_OSC_GateOscRc400M(false);
 
     /* Init OSC RC 48M */
     CLOCK_OSC_EnableOsc48M(true);
@@ -349,22 +348,29 @@ void BOARD_BootClockRUN(void)
     {
     }
 
-    /* Switch both core, M7 Systick and Bus_Lpsr to OscRC48MDiv2 first */
+    /* Switch core M7 clock root to OscRC48MDiv2 first */
 #if __CORTEX_M == 7
     rootCfg.mux = kCLOCK_M7_ClockRoot_MuxOscRc48MDiv2;
     rootCfg.div = 1;
     CLOCK_SetRootClock(kCLOCK_Root_M7, &rootCfg);
+#endif
 
+    /* Switch core M7 systick clock root to OscRC48MDiv2 first */
+#if __CORTEX_M == 7
     rootCfg.mux = kCLOCK_M7_SYSTICK_ClockRoot_MuxOscRc48MDiv2;
     rootCfg.div = 1;
     CLOCK_SetRootClock(kCLOCK_Root_M7_Systick, &rootCfg);
 #endif
 
+    /* Switch core M4 clock root to OscRC48MDiv2 first */
 #if __CORTEX_M == 4
     rootCfg.mux = kCLOCK_M4_ClockRoot_MuxOscRc48MDiv2;
     rootCfg.div = 1;
     CLOCK_SetRootClock(kCLOCK_Root_M4, &rootCfg);
+#endif
 
+    /* Switch the Bus_Lpsr clock root to OscRC48MDiv2 first */
+#if __CORTEX_M == 4
     rootCfg.mux = kCLOCK_BUS_LPSR_ClockRoot_MuxOscRc48MDiv2;
     rootCfg.div = 1;
     CLOCK_SetRootClock(kCLOCK_Root_Bus_Lpsr, &rootCfg);
diff --git a/hw/bsp/imxrt/boards/mimxrt1170_evkb/board/clock_config.h b/hw/bsp/imxrt/boards/mimxrt1170_evkb/board/clock_config.h
index 4a4d35eaa..f68724314 100644
--- a/hw/bsp/imxrt/boards/mimxrt1170_evkb/board/clock_config.h
+++ b/hw/bsp/imxrt/boards/mimxrt1170_evkb/board/clock_config.h
@@ -48,7 +48,7 @@ void BOARD_InitBootClocks(void);
 #define BOARD_BOOTCLOCKRUN_ARM_PLL_CLK                996000000UL    /* Clock consumers of ARM_PLL_CLK output : N/A */
 #define BOARD_BOOTCLOCKRUN_ASRC_CLK_ROOT              24000000UL     /* Clock consumers of ASRC_CLK_ROOT output : ASRC */
 #define BOARD_BOOTCLOCKRUN_AXI_CLK_ROOT               996000000UL    /* Clock consumers of AXI_CLK_ROOT output : FLEXRAM */
-#define BOARD_BOOTCLOCKRUN_BUS_CLK_ROOT               240000000UL    /* Clock consumers of BUS_CLK_ROOT output : ADC_ETC, AOI1, AOI2, CAAM, CAN1, CAN2, CM7_GPIO2, CM7_GPIO3, CMP1, CMP2, CMP3, CMP4, CSI, DAC, DMA0, DMAMUX0, DSI_HOST, EMVSIM1, EMVSIM2, ENC1, ENC2, ENC3, ENC4, ENET, ENET_1G, ENET_QOS, EWM, FLEXIO1, FLEXIO2, FLEXSPI1, FLEXSPI2, GPIO1, GPIO2, GPIO3, GPIO4, GPIO5, GPIO6, IEE_APC, IOMUXC, IOMUXC_GPR, KPP, LCDIF, LCDIFV2, LPADC1, LPADC2, LPI2C1, LPI2C2, LPI2C3, LPI2C4, LPSPI1, LPSPI2, LPSPI3, LPSPI4, LPUART1, LPUART10, LPUART2, LPUART3, LPUART4, LPUART5, LPUART6, LPUART7, LPUART8, LPUART9, MECC1, MECC2, MIPI_CSI2RX, PIT1, PWM1, PWM2, PWM3, PWM4, PXP, RTWDOG3, SAI1, SAI2, SAI3, SPDIF, TMR1, TMR2, TMR3, TMR4, USBPHY1, USBPHY2, USB_OTG1, USB_OTG2, USDHC1, USDHC2, WDOG1, WDOG2, XBARA1, XBARB2, XBARB3, XECC_FLEXSPI1, XECC_FLEXSPI2, XECC_SEMC, XRDC2_D0, XRDC2_D1 */
+#define BOARD_BOOTCLOCKRUN_BUS_CLK_ROOT               240000000UL    /* Clock consumers of BUS_CLK_ROOT output : ADC_ETC, AOI1, AOI2, CAAM, CAN1, CAN2, CM7_GPIO2, CM7_GPIO3, CMP1, CMP2, CMP3, CMP4, CSI, DAC, DMA0, DMAMUX0, DSI_HOST, EMVSIM1, EMVSIM2, ENC1, ENC2, ENC3, ENC4, ENET, ENET_1G, ENET_QOS, EWM, FLEXIO1, FLEXIO2, FLEXSPI1, FLEXSPI2, GPIO1, GPIO2, GPIO3, GPIO4, GPIO5, GPIO6, IEE_APC, IEE__IEE_RT1170, IOMUXC, IOMUXC_GPR, KPP, LCDIF, LCDIFV2, LPADC1, LPADC2, LPI2C1, LPI2C2, LPI2C3, LPI2C4, LPSPI1, LPSPI2, LPSPI3, LPSPI4, LPUART1, LPUART10, LPUART2, LPUART3, LPUART4, LPUART5, LPUART6, LPUART7, LPUART8, LPUART9, MECC1, MECC2, MIPI_CSI2RX, PIT1, PWM1, PWM2, PWM3, PWM4, PXP, RTWDOG3, SAI1, SAI2, SAI3, SPDIF, TMR1, TMR2, TMR3, TMR4, USBPHY1, USBPHY2, USB_OTG1, USB_OTG2, USDHC1, USDHC2, WDOG1, WDOG2, XBARA1, XBARB2, XBARB3, XECC_FLEXSPI1, XECC_FLEXSPI2, XECC_SEMC, XRDC2_D0, XRDC2_D1 */
 #define BOARD_BOOTCLOCKRUN_BUS_LPSR_CLK_ROOT          160000000UL    /* Clock consumers of BUS_LPSR_CLK_ROOT output : CAN3, GPIO10, GPIO11, GPIO12, GPIO7, GPIO8, GPIO9, IOMUXC_LPSR, LPI2C5, LPI2C6, LPSPI5, LPSPI6, LPUART11, LPUART12, MUA, MUB, PDM, PIT2, RDC, RTWDOG4, SAI4, SNVS, XRDC2_D0, XRDC2_D1 */
 #define BOARD_BOOTCLOCKRUN_CAN1_CLK_ROOT              24000000UL     /* Clock consumers of CAN1_CLK_ROOT output : CAN1 */
 #define BOARD_BOOTCLOCKRUN_CAN2_CLK_ROOT              24000000UL     /* Clock consumers of CAN2_CLK_ROOT output : CAN2 */
diff --git a/hw/bsp/imxrt/boards/mimxrt1170_evkb/board/pin_mux.c b/hw/bsp/imxrt/boards/mimxrt1170_evkb/board/pin_mux.c
index 81ffb35e3..2c83fb55e 100644
--- a/hw/bsp/imxrt/boards/mimxrt1170_evkb/board/pin_mux.c
+++ b/hw/bsp/imxrt/boards/mimxrt1170_evkb/board/pin_mux.c
@@ -6,11 +6,11 @@
 /*
  * TEXT BELOW IS USED AS SETTING FOR TOOLS *************************************
 !!GlobalInfo
-product: Pins v14.0
+product: Pins v16.0
 processor: MIMXRT1176xxxxx
 package_id: MIMXRT1176DVMAA
 mcu_data: ksdk2_0
-processor_version: 14.0.1
+processor_version: 16.3.0
 board: MIMXRT1170-EVKB
 external_user_signals: {}
 pin_labels:
@@ -90,7 +90,7 @@ void BOARD_InitPins(void) {
       IOMUXC_GPIO_AD_04_GPIO9_IO03,           /* GPIO_AD_04 PAD functional properties : */
       0x02U);                                 /* Slew Rate Field: Slow Slew Rate
                                                  Drive Strength Field: high drive strength
-                                                 Pull / Keep Select Field: Pull Disable, Highz
+                                                 Pull / Keep Select Field: Pull Disable
                                                  Pull Up / Down Config. Field: Weak pull down
                                                  Open Drain Field: Disabled
                                                  Domain write protection: Both cores are allowed
@@ -99,7 +99,7 @@ void BOARD_InitPins(void) {
       IOMUXC_GPIO_AD_24_LPUART1_TXD,          /* GPIO_AD_24 PAD functional properties : */
       0x02U);                                 /* Slew Rate Field: Slow Slew Rate
                                                  Drive Strength Field: high drive strength
-                                                 Pull / Keep Select Field: Pull Disable, Highz
+                                                 Pull / Keep Select Field: Pull Disable
                                                  Pull Up / Down Config. Field: Weak pull down
                                                  Open Drain Field: Disabled
                                                  Domain write protection: Both cores are allowed
@@ -108,22 +108,19 @@ void BOARD_InitPins(void) {
       IOMUXC_GPIO_AD_25_LPUART1_RXD,          /* GPIO_AD_25 PAD functional properties : */
       0x02U);                                 /* Slew Rate Field: Slow Slew Rate
                                                  Drive Strength Field: high drive strength
-                                                 Pull / Keep Select Field: Pull Disable, Highz
+                                                 Pull / Keep Select Field: Pull Disable
                                                  Pull Up / Down Config. Field: Weak pull down
                                                  Open Drain Field: Disabled
                                                  Domain write protection: Both cores are allowed
                                                  Domain write protection lock: Neither of DWP bits is locked */
   IOMUXC_SetPinConfig(
       IOMUXC_WAKEUP_DIG_GPIO13_IO00,          /* WAKEUP_DIG PAD functional properties : */
-      0x0EU);                                 /* Slew Rate Field: Slow Slew Rate
-                                                 Drive Strength Field: high driver
-                                                 Pull / Keep Select Field: Pull Enable
+      0x0EU);                                 /* Pull / Keep Select Field: Pull Enable
                                                  Pull Up / Down Config. Field: Weak pull up
                                                  Open Drain SNVS Field: Disabled
                                                  Domain write protection: Both cores are allowed
                                                  Domain write protection lock: Neither of DWP bits is locked */
 }
-
 /***********************************************************************************************************************
  * EOF
  **********************************************************************************************************************/
diff --git a/hw/bsp/imxrt/boards/mimxrt1170_evkb/board/pin_mux.h b/hw/bsp/imxrt/boards/mimxrt1170_evkb/board/pin_mux.h
index 550bd1474..a5b621476 100644
--- a/hw/bsp/imxrt/boards/mimxrt1170_evkb/board/pin_mux.h
+++ b/hw/bsp/imxrt/boards/mimxrt1170_evkb/board/pin_mux.h
@@ -46,7 +46,7 @@ void BOARD_InitBootPins(void);
 #define BOARD_INITPINS_USER_LED_GPIO_PIN                                      3U   /*!< GPIO pin number */
 #define BOARD_INITPINS_USER_LED_GPIO_PIN_MASK                         (1U << 3U)   /*!< GPIO pin mask */
 
-/* WAKEUP (coord T8), USER_BUTTON */
+/* WAKEUP (coord T8), USER_BUTTON/SW7 */
 /* Routed pin properties */
 #define BOARD_INITPINS_USER_BUTTON_PERIPHERAL                             GPIO13   /*!< Peripheral name */
 #define BOARD_INITPINS_USER_BUTTON_SIGNAL                                gpio_io   /*!< Signal name */
diff --git a/hw/bsp/imxrt/boards/mimxrt1170_evkb/mimxrt1170_evkb.mex b/hw/bsp/imxrt/boards/mimxrt1170_evkb/mimxrt1170_evkb.mex
index e68b9ea7e..a4c8917f7 100644
--- a/hw/bsp/imxrt/boards/mimxrt1170_evkb/mimxrt1170_evkb.mex
+++ b/hw/bsp/imxrt/boards/mimxrt1170_evkb/mimxrt1170_evkb.mex
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding= "UTF-8" ?>
-<configuration name="MIMXRT1176xxxxx" xsi:schemaLocation="http://mcuxpresso.nxp.com/XSD/mex_configuration_14 http://mcuxpresso.nxp.com/XSD/mex_configuration_14.xsd" uuid="060646c1-2247-47a8-b52d-03c1968b4426" version="14" xmlns="http://mcuxpresso.nxp.com/XSD/mex_configuration_14" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+<configuration name="MIMXRT1176xxxxx" xsi:schemaLocation="http://mcuxpresso.nxp.com/XSD/mex_configuration_16 http://mcuxpresso.nxp.com/XSD/mex_configuration_16.xsd" uuid="060646c1-2247-47a8-b52d-03c1968b4426" version="16" xmlns="http://mcuxpresso.nxp.com/XSD/mex_configuration_16" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <common>
       <processor>MIMXRT1176xxxxx</processor>
       <package>MIMXRT1176DVMAA</package>
@@ -19,18 +19,17 @@
       <generate_registers_defines>false</generate_registers_defines>
    </preferences>
    <tools>
-      <pins name="Pins" version="14.0" enabled="true" update_project_code="true">
+      <pins name="Pins" version="16.0" enabled="true" update_project_code="true">
          <generated_project_files>
             <file path="board/pin_mux.c" update_enabled="true"/>
             <file path="board/pin_mux.h" update_enabled="true"/>
          </generated_project_files>
          <pins_profile>
-            <processor_version>14.0.1</processor_version>
+            <processor_version>16.3.0</processor_version>
             <pin_labels>
                <pin_label pin_num="M13" pin_signal="GPIO_AD_04" label="SIM1_PD/J44[C8]/USER_LED_CTL1/J9[8]/J25[7]" identifier="SIM1_PD;LED;USER_LED"/>
             </pin_labels>
             <external_user_signals>
-               <routingDetailsColumns/>
                <properties/>
             </external_user_signals>
             <power_domains/>
@@ -44,7 +43,7 @@
                   <enableClock>true</enableClock>
                </options>
                <dependencies>
-                  <dependency resourceType="Peripheral" resourceId="LPUART1" description="Peripheral LPUART1 is not initialized" problem_level="1" source="Pins:BOARD_InitPins">
+                  <dependency resourceType="Peripheral" resourceId="LPUART1" description="Peripheral LPUART1 signals are routed in the Pins Tool, but the peripheral is not initialized in the Peripherals Tool." problem_level="1" source="Pins:BOARD_InitPins">
                      <feature name="initialized" evaluation="equal">
                         <data>true</data>
                      </feature>
@@ -104,13 +103,13 @@
             </function>
          </functions_list>
       </pins>
-      <clocks name="Clocks" version="12.0" enabled="true" update_project_code="true">
+      <clocks name="Clocks" version="14.0" enabled="true" update_project_code="true">
          <generated_project_files>
             <file path="board/clock_config.c" update_enabled="true"/>
             <file path="board/clock_config.h" update_enabled="true"/>
          </generated_project_files>
          <clocks_profile>
-            <processor_version>14.0.1</processor_version>
+            <processor_version>16.3.0</processor_version>
          </clocks_profile>
          <clock_configurations>
             <clock_configuration name="BOARD_BootClockRUN" id_prefix="" prefix_user_defined="false">
diff --git a/hw/bsp/imxrt/family.c b/hw/bsp/imxrt/family.c
index ce4a6bbc9..f365981f5 100644
--- a/hw/bsp/imxrt/family.c
+++ b/hw/bsp/imxrt/family.c
@@ -24,10 +24,10 @@
  * This file is part of the TinyUSB stack.
  */
 
-#include "board.h"
+#include "bsp/board_api.h"
 #include "board/clock_config.h"
 #include "board/pin_mux.h"
-#include "bsp/board_api.h"
+#include "board.h"
 
 // Suppress warning caused by mcu driver
 #ifdef __GNUC__
@@ -47,14 +47,14 @@
 #endif
 
 /* --- Note about USB buffer RAM ---
-For M7 core it's recommended to put USB buffer in DTCM for better performance (flexspi_nor linker default)
-Otherwise you have to put the buffer in a non-cacheable section by configurate MPU manually or using BOARD_ConfigMPU():
-- Define CFG_TUSB_MEM_SECTION=__attribute__((section("NonCacheable")))
-- (IAR only) Change __NCACHE_REGION_SIZE in linker script to cover the size of non-cacheable section, multiple of 2^N
+  For M7 core it's recommended to put USB buffer in DTCM for better performance (flexspi_nor linker default)
+  Otherwise you have to put the buffer in a non-cacheable section by configurate MPU manually or using BOARD_ConfigMPU():
+  - Define CFG_TUSB_MEM_SECTION=__attribute__((section("NonCacheable")))
+  - (IAR only) Change __NCACHE_REGION_SIZE in linker script to cover the size of non-cacheable section, multiple of 2^N
 
-For secondary M4 core, the USB controller doesn't support transfer from DTCM so OCRAM must be used:
-- __NCACHE_REGION_SIZE is defined by the linker script by default
-- Define CFG_TUSB_MEM_SECTION=__attribute__((section("NonCacheable")))
+  For secondary M4 core, the USB controller doesn't support transfer from DTCM so OCRAM must be used:
+  - __NCACHE_REGION_SIZE is defined by the linker script by default
+  - Define CFG_TUSB_MEM_SECTION=__attribute__((section("NonCacheable")))
 */
 
 static void BOARD_ConfigMPU(void);
@@ -148,7 +148,112 @@ void board_init(void) {
 #endif
 }
 
-/* MPU configuration. */
+//--------------------------------------------------------------------+
+// USB Interrupt Handler
+//--------------------------------------------------------------------+
+void USB_OTG1_IRQHandler(void) {
+  tusb_int_handler(0, true);
+}
+
+void USB_OTG2_IRQHandler(void) {
+  tusb_int_handler(1, true);
+}
+
+//--------------------------------------------------------------------+
+// Board porting API
+//--------------------------------------------------------------------+
+
+void board_led_write(bool state) {
+  GPIO_PinWrite(LED_PORT, LED_PIN, state ? LED_STATE_ON : (1 - LED_STATE_ON));
+}
+
+uint32_t board_button_read(void) {
+  return BUTTON_STATE_ACTIVE == GPIO_PinRead(BUTTON_PORT, BUTTON_PIN);
+}
+
+size_t board_get_unique_id(uint8_t id[], size_t max_len) {
+  (void) max_len;
+
+#if FSL_FEATURE_OCOTP_HAS_TIMING_CTRL
+  OCOTP_Init(OCOTP, CLOCK_GetFreq(kCLOCK_IpgClk));
+#else
+  OCOTP_Init(OCOTP, 0u);
+#endif
+
+  // Reads shadow registers 0x01 - 0x04 (Configuration and Manufacturing Info)
+  // into 8 bit wide destination, avoiding punning.
+  for (int i = 0; i < 4; ++i) {
+    uint32_t wr = OCOTP_ReadFuseShadowRegister(OCOTP, i + 1);
+    for (int j = 0; j < 4; j++) {
+      id[i * 4 + j] = wr & 0xff;
+      wr >>= 8;
+    }
+  }
+  OCOTP_Deinit(OCOTP);
+
+  return 16;
+}
+
+int board_uart_read(uint8_t *buf, int len) {
+  int count = 0;
+
+  while (count < len) {
+    uint8_t const rx_count = LPUART_GetRxFifoCount(UART_PORT);
+    if (!rx_count) {
+      // clear all error flag if any
+      uint32_t status_flags = LPUART_GetStatusFlags(UART_PORT);
+      status_flags &= (kLPUART_RxOverrunFlag | kLPUART_ParityErrorFlag | kLPUART_FramingErrorFlag |
+                       kLPUART_NoiseErrorFlag);
+      LPUART_ClearStatusFlags(UART_PORT, status_flags);
+      break;
+    }
+
+    for (int i = 0; i < rx_count; i++) {
+      buf[count] = LPUART_ReadByte(UART_PORT);
+      count++;
+    }
+  }
+
+  return count;
+}
+
+int board_uart_write(void const *buf, int len) {
+  LPUART_WriteBlocking(UART_PORT, (uint8_t const *) buf, len);
+  return len;
+}
+
+#if CFG_TUSB_OS == OPT_OS_NONE
+volatile uint32_t system_ticks = 0;
+void SysTick_Handler(void) {
+  system_ticks++;
+}
+
+uint32_t board_millis(void) {
+  return system_ticks;
+}
+#endif
+
+
+#ifndef __ICCARM__
+// Implement _start() since we use linker flag '-nostartfiles'.
+// Requires defined __STARTUP_CLEAR_BSS,
+extern int main(void);
+TU_ATTR_UNUSED void _start(void) {
+  // called by startup code
+  main();
+  while (1) {}
+}
+
+#ifdef __clang__
+void _exit(int __status) {
+  while (1) {}
+}
+#endif
+#endif
+
+//--------------------------------------------------------------------
+// MPU configuration
+//--------------------------------------------------------------------
 #if __CORTEX_M == 7
 static void BOARD_ConfigMPU(void) {
   #if defined(__CC_ARM) || defined(__ARMCC_VERSION)
@@ -343,7 +448,9 @@ static void BOARD_ConfigMPU(void) {
   SCB_EnableICache();
   #endif
 }
+
 #elif __CORTEX_M == 4
+
 void BOARD_ConfigMPU(void) {
   #if defined(__CC_ARM) || defined(__ARMCC_VERSION)
   extern uint32_t Image$$RW_m_ncache$$Base[];
@@ -525,107 +632,3 @@ void BOARD_ConfigMPU(void) {
   LMEM->PCCCR |= LMEM_PCCCR_ENCACHE_MASK;
 }
 #endif
-
-//--------------------------------------------------------------------+
-// USB Interrupt Handler
-//--------------------------------------------------------------------+
-void USB_OTG1_IRQHandler(void) {
-  tusb_int_handler(0, true);
-}
-
-void USB_OTG2_IRQHandler(void) {
-  tusb_int_handler(1, true);
-}
-
-//--------------------------------------------------------------------+
-// Board porting API
-//--------------------------------------------------------------------+
-
-void board_led_write(bool state) {
-  GPIO_PinWrite(LED_PORT, LED_PIN, state ? LED_STATE_ON : (1 - LED_STATE_ON));
-}
-
-uint32_t board_button_read(void) {
-  return BUTTON_STATE_ACTIVE == GPIO_PinRead(BUTTON_PORT, BUTTON_PIN);
-}
-
-size_t board_get_unique_id(uint8_t id[], size_t max_len) {
-  (void) max_len;
-
-#if FSL_FEATURE_OCOTP_HAS_TIMING_CTRL
-  OCOTP_Init(OCOTP, CLOCK_GetFreq(kCLOCK_IpgClk));
-#else
-  OCOTP_Init(OCOTP, 0u);
-#endif
-
-  // Reads shadow registers 0x01 - 0x04 (Configuration and Manufacturing Info)
-  // into 8 bit wide destination, avoiding punning.
-  for (int i = 0; i < 4; ++i) {
-    uint32_t wr = OCOTP_ReadFuseShadowRegister(OCOTP, i + 1);
-    for (int j = 0; j < 4; j++) {
-      id[i * 4 + j] = wr & 0xff;
-      wr >>= 8;
-    }
-  }
-  OCOTP_Deinit(OCOTP);
-
-  return 16;
-}
-
-int board_uart_read(uint8_t *buf, int len) {
-  int count = 0;
-
-  while (count < len) {
-    uint8_t const rx_count = LPUART_GetRxFifoCount(UART_PORT);
-    if (!rx_count) {
-      // clear all error flag if any
-      uint32_t status_flags = LPUART_GetStatusFlags(UART_PORT);
-      status_flags &= (kLPUART_RxOverrunFlag | kLPUART_ParityErrorFlag | kLPUART_FramingErrorFlag |
-                       kLPUART_NoiseErrorFlag);
-      LPUART_ClearStatusFlags(UART_PORT, status_flags);
-      break;
-    }
-
-    for (int i = 0; i < rx_count; i++) {
-      buf[count] = LPUART_ReadByte(UART_PORT);
-      count++;
-    }
-  }
-
-  return count;
-}
-
-int board_uart_write(void const *buf, int len) {
-  LPUART_WriteBlocking(UART_PORT, (uint8_t const *) buf, len);
-  return len;
-}
-
-#if CFG_TUSB_OS == OPT_OS_NONE
-volatile uint32_t system_ticks = 0;
-void SysTick_Handler(void) {
-  system_ticks++;
-}
-
-uint32_t board_millis(void) {
-  return system_ticks;
-}
-#endif
-
-
-#ifndef __ICCARM__
-// Implement _start() since we use linker flag '-nostartfiles'.
-// Requires defined __STARTUP_CLEAR_BSS,
-extern int main(void);
-TU_ATTR_UNUSED void _start(void) {
-  // called by startup code
-  main();
-  while (1) {}
-}
-
-  #ifdef __clang__
-void _exit(int __status) {
-  while (1) {}
-}
-  #endif
-
-#endif
diff --git a/src/common/tusb_mcu.h b/src/common/tusb_mcu.h
index d282c890d..a0175d664 100644
--- a/src/common/tusb_mcu.h
+++ b/src/common/tusb_mcu.h
@@ -108,12 +108,20 @@
   #define TUP_DCD_ENDPOINT_MAX    16
 
 #elif TU_CHECK_MCU(OPT_MCU_MIMXRT1XXX)
+  #include "fsl_device_registers.h"
+
   #define TUP_USBIP_CHIPIDEA_HS
   #define TUP_USBIP_EHCI
 
   #define TUP_DCD_ENDPOINT_MAX    8
   #define TUP_RHPORT_HIGHSPEED    1
 
+  #if __CORTEX_M == 7
+  #define CFG_TUD_MEM_DCACHE_ENABLE_DEFAULT  1
+  #define CFG_TUH_MEM_DCACHE_ENABLE_DEFAULT  1
+  #define CFG_TUSB_MEM_DCACHE_LINE_SIZE      32
+  #endif
+
 #elif TU_CHECK_MCU(OPT_MCU_KINETIS_KL, OPT_MCU_KINETIS_K32L, OPT_MCU_KINETIS_K)
   #define TUP_USBIP_CHIPIDEA_FS
   #define TUP_USBIP_CHIPIDEA_FS_KINETIS