boards: imxrt1060-evk: Fix knsh and related linker script files

Summary:
- Fix knsh/defconfig to work with pyOCD
- Fix kernel-space.ld to boot
- Fix memory.ld for CONFIG_BUILD_PROTECTED=y

Impact:
- CONFIB_BUILD_PROTECTED=y only

Testing:
- Tested with imxrt1060-evk

Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>

boards/arm/imxrt/imxrt1060-evk/configs/knsh/defconfig

@@ -15,7 +15,9 @@ CONFIG_ARCH_CHIP_MIMXRT1062DVL6A=y
 CONFIG_ARCH_STACKDUMP=y
 CONFIG_ARMV7M_DCACHE=y
 CONFIG_ARMV7M_DCACHE_WRITETHROUGH=y
+CONFIG_ARMV7M_DTCM=y
 CONFIG_ARMV7M_ICACHE=y
+CONFIG_ARMV7M_ITCM=y
 CONFIG_ARMV7M_USEBASEPRI=y
 CONFIG_ARM_MPU=y
 CONFIG_BOARD_LOOPSPERMSEC=104926

boards/arm/imxrt/imxrt1060-evk/scripts/kernel-space.ld

@@ -24,10 +24,31 @@
 
 OUTPUT_ARCH(arm)
 EXTERN(_vectors)
+EXTERN(g_flash_config)
+EXTERN(g_image_vector_table)
+EXTERN(g_boot_data)
+
 ENTRY(_stext)
 
 SECTIONS
 {
+    /* Image Vector Table and Boot Data for booting from external flash */
+
+    .boot_hdr : ALIGN(4)
+    {
+        FILL(0xff)
+        __boot_hdr_start__ = ABSOLUTE(.) ;
+        KEEP(*(.boot_hdr.conf))
+        . = 0x1000 ;
+        KEEP(*(.boot_hdr.ivt))
+        . = 0x1020 ;
+        KEEP(*(.boot_hdr.boot_data))
+        . = 0x1030 ;
+        KEEP(*(.boot_hdr.dcd_data))
+        __boot_hdr_end__ = ABSOLUTE(.) ;
+        . = 0x2000 ;
+    } > kflash
+
   .text :
   {
     _stext = ABSOLUTE(.);

boards/arm/imxrt/imxrt1060-evk/scripts/memory.ld

@@ -61,7 +61,8 @@ MEMORY
 
   /* 1MiB of OCRAM */
 
-  dtcm   (rwx) : ORIGIN = 0x20000000, LENGTH = 512K
-  kocram (rwx) : ORIGIN = 0x20200000, LENGTH = 512K
-  uocram (rwx) : ORIGIN = 0x20240000, LENGTH = 512K
+  itcm   (rwx) : ORIGIN = 0x00000000, LENGTH = 128K
+  dtcm   (rwx) : ORIGIN = 0x20000000, LENGTH = 128K
+  kocram (rwx) : ORIGIN = 0x20200000, LENGTH = 256K
+  uocram (rwx) : ORIGIN = 0x20240000, LENGTH = 256K
 }