imxrt: move all required code to noxip

JIRA: RTOS-???

_startc.c

@@ -33,8 +33,12 @@ void _startc(int argc, char **argv, char **env)
 	size_t i, size;
 
 	/* Load .fastram.text, .data and .rodata sections */
-	if (__ramtext_start != __ramtext_load)
-		hal_memcpy(__ramtext_start, __ramtext_load, __ramtext_end - __ramtext_start);
+	if (__ramtext_start != __ramtext_load) {
+		/* hal_memcpy may reside in fastram. */
+		for (i = 0; i <= __ramtext_end - __ramtext_start; i++) {
+			__ramtext_start[i] = __ramtext_load[i];
+		}
+	}
 
 	if (__data_start != __data_load)
 		hal_memcpy(__data_start, __data_load, __data_end - __data_start);

devices/flash-imxrt/fspi/fspi_rt105x.h

@@ -30,12 +30,12 @@ enum { mcr0 = 0, mcr1, mcr2, ahbcr, inten, intr, lutkey, lutcr, ahbrxbuf0cr0, ah
 #define AHBRXBUF_CNT 4
 
 
-static inline addr_t flexspi_ahbAddr(int instance)
+__attribute__((section(".noxip"))) static inline addr_t flexspi_ahbAddr(int instance)
 {
 	return (instance == flexspi_instance1) ? 0x60000000 : 0;
 }
 
-static inline void *flexspi_getBase(int instance)
+__attribute__((section(".noxip"))) static inline void *flexspi_getBase(int instance)
 {
 	return instance == flexspi_instance1 ? (void *)0x402a8000 : NULL;
 }

devices/flash-imxrt/fspi/fspi_rt106x.h

@@ -30,7 +30,7 @@ enum { mcr0 = 0, mcr1, mcr2, ahbcr, inten, intr, lutkey, lutcr, ahbrxbuf0cr0, ah
 #define AHBRXBUF_CNT 4
 
 
-static addr_t flexspi_ahbAddr(int instance)
+__attribute__((section(".noxip"))) static addr_t flexspi_ahbAddr(int instance)
 {
 	switch (instance) {
 		case flexspi_instance1: return 0x60000000;
@@ -40,7 +40,7 @@ static addr_t flexspi_ahbAddr(int instance)
 }
 
 
-static void *flexspi_getBase(int instance)
+__attribute__((section(".noxip"))) static void *flexspi_getBase(int instance)
 {
 	switch (instance) {
 		case flexspi_instance1: return (void *)0x402a8000;

devices/flash-imxrt/fspi/fspi_rt117x.h

@@ -33,7 +33,7 @@ enum { mcr0 = 0, mcr1, mcr2, ahbcr, inten, intr, lutkey, lutcr, ahbrxbuf0cr0, ah
 #define AHBRXBUF_CNT 8
 
 
-static addr_t flexspi_ahbAddr(int instance)
+__attribute__((section(".noxip"))) static addr_t flexspi_ahbAddr(int instance)
 {
 	switch (instance) {
 		case flexspi_instance1: return 0x30000000;
@@ -43,7 +43,7 @@ static addr_t flexspi_ahbAddr(int instance)
 }
 
 
-static void *flexspi_getBase(int instance)
+__attribute__((section(".noxip"))) static void *flexspi_getBase(int instance)
 {
 	switch (instance) {
 		case flexspi_instance1: return (void *)0x400cc000;

hal/armv7m/cpu.c

@@ -298,7 +298,7 @@ unsigned int hal_cpuID(void)
 }
 
 
-void hal_cpuReboot(void)
+__attribute__((section(".noxip"))) void hal_cpuReboot(void)
 {
 	hal_cpuDataSyncBarrier();
 	*(cpu_common.scb + scb_aircr) = ((0x5fa << 16) | (*(cpu_common.scb + scb_aircr) & (0x700)) | (1 << 0x02));

hal/armv7m/cpu.h

@@ -21,28 +21,17 @@
 #include <hal/hal.h>
 
 
-static inline void hal_cpuDataMemoryBarrier(void)
-{
-	__asm__ volatile ("dmb");
-}
+/* NOTE: defined as macros to make sure there are no calls to code in flash in .noxip sections. */
+#define hal_cpuDataMemoryBarrier() do { __asm__ volatile ("dmb"); } while(0)
 
 
-static inline void hal_cpuDataSyncBarrier(void)
-{
-	__asm__ volatile ("dsb");
-}
+#define hal_cpuDataSyncBarrier() do { __asm__ volatile ("dsb"); } while(0)
 
 
-static inline void hal_cpuInstrBarrier(void)
-{
-	__asm__ volatile ("isb");
-}
+#define hal_cpuInstrBarrier() do { __asm__ volatile ("isb"); } while(0)
 
 
-static inline void hal_cpuHalt(void)
-{
-	__asm__ volatile ("wfi");
-}
+#define hal_cpuHalt() do { __asm__ volatile ("wfi"); } while(0)
 
 
 extern void hal_scbSetPriorityGrouping(u32 group);

hal/armv7m/imxrt/10xx/console.c

@@ -76,7 +76,7 @@ void hal_consoleSetHooks(ssize_t (*writeHook)(int, const void *, size_t))
 }
 
 
-void hal_consolePrint(const char *s)
+__attribute__((section(".noxip"))) void hal_consolePrint(const char *s)
 {
 	const char *ptr;
 

hal/armv7m/string.c

@@ -17,7 +17,7 @@
 #include <hal/string.h>
 
 
-void *hal_memcpy(void *dst, const void *src, size_t l)
+__attribute__((section(".noxip"))) void *hal_memcpy(void *dst, const void *src, size_t l)
 {
 	void *ret = dst;
 
@@ -105,7 +105,7 @@ void hal_memset(void *dst, int v, size_t l)
 }
 
 
-size_t hal_strlen(const char *s)
+__attribute__((section(".noxip"))) size_t hal_strlen(const char *s)
 {
 	size_t k = 0;
 
@@ -186,7 +186,7 @@ int hal_strncmp(const char *s1, const char *s2, size_t count)
 }
 
 
-char *hal_strcpy(char *dest, const char *src)
+__attribute__((section(".noxip"))) char *hal_strcpy(char *dest, const char *src)
 {
 	char *p = dest;
 
@@ -240,7 +240,7 @@ char *hal_strchr(const char *s, int c)
 }
 
 
-int hal_i2s(char *prefix, char *s, unsigned int i, unsigned char b, char zero)
+__attribute__((section(".noxip"))) int hal_i2s(char *prefix, char *s, unsigned int i, unsigned char b, char zero)
 {
 	static const char digits[] = "0123456789abcdef";
 	char c;