ARM: mxs: support full SPL framework

This allows using the full SPL framework on mxs devices.  In this
mode, the u-boot.sb image loaded by the boot ROM contains only the
SPL which then loads U-Boot proper or a kernel in falcon mode.

Signed-off-by: Mans Rullgard <mans@mansr.com>

arch/arm/Kconfig

@@ -1352,7 +1352,7 @@ source "arch/arm/Kconfig.debug"
 endmenu
 
 config SPL_LDSCRIPT
-        default "arch/arm/cpu/arm926ejs/mxs/u-boot-spl.lds" if ARCH_MX23 || ARCH_MX28
+        default "arch/arm/cpu/arm926ejs/mxs/u-boot-spl.lds" if (ARCH_MX23 || ARCH_MX28) && !SPL_FRAMEWORK
         default "arch/arm/cpu/arm1136/u-boot-spl.lds" if CPU_ARM1136
 	default "arch/arm/cpu/armv8/u-boot-spl.lds" if ARM64
 

arch/arm/cpu/arm926ejs/mxs/Makefile

@@ -14,8 +14,8 @@ obj-y	+= spl_boot.o spl_lradc_init.o spl_mem_init.o spl_power_init.o
 endif
 
 # Specify the target for use in elftosb call
-MKIMAGE_TARGET-$(CONFIG_MX23) = mxsimage.mx23.cfg
-MKIMAGE_TARGET-$(CONFIG_MX28) = mxsimage.mx28.cfg
+MKIMAGE_TARGET-$(CONFIG_MX23) = mxsimage$(CONFIG_SPL_FRAMEWORK:%=-spl).mx23.cfg
+MKIMAGE_TARGET-$(CONFIG_MX28) = mxsimage$(CONFIG_SPL_FRAMEWORK:%=-spl).mx28.cfg
 
 # Generate HAB-capable IVT
 #

arch/arm/cpu/arm926ejs/mxs/mxsimage-spl.mx23.cfg

@@ -0,0 +1,5 @@
+DISPLAYPROGRESS
+SECTION 0x0 BOOTABLE
+ TAG LAST
+ LOAD     0x1000     spl/u-boot-spl.bin
+ CALL     0x1000     0x0

arch/arm/cpu/arm926ejs/mxs/mxsimage-spl.mx28.cfg

@@ -0,0 +1,6 @@
+DISPLAYPROGRESS
+SECTION 0x0 BOOTABLE
+ TAG LAST
+ LOAD     0x1000     spl/u-boot-spl.bin
+ LOAD IVT 0x8000     0x1000
+ CALL HAB 0x8000     0x0

arch/arm/cpu/arm926ejs/mxs/spl_boot.c

@@ -146,6 +146,7 @@ void mxs_common_spl_init(const uint32_t arg, const uint32_t *resptr,
 	}
 }
 
+#ifndef CONFIG_SPL_FRAMEWORK
 /* Support aparatus */
 inline void board_init_f(unsigned long bootflag)
 {
@@ -158,3 +159,4 @@ inline void board_init_r(gd_t *id, ulong dest_addr)
 	for (;;)
 		;
 }
+#endif

include/configs/mxs.h

@@ -44,8 +44,10 @@
 /* Startup hooks */
 
 /* SPL */
+#ifndef CONFIG_SPL_FRAMEWORK
 #define CONFIG_SPL_NO_CPU_SUPPORT_CODE
 #define CONFIG_SPL_START_S_PATH	"arch/arm/cpu/arm926ejs/mxs"
+#endif
 
 /* Memory sizes */
 #define CONFIG_SYS_MALLOC_LEN		0x00400000	/* 4 MB for malloc */