enabling thumb only enter user mode in tmr-ints.

usermode breaks rftests.

Makefile

@@ -70,7 +70,7 @@ NOTHUMB_CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS)         \
         -I$(TOPDIR)/include                             \
         -fno-builtin -ffreestanding -nostdinc -isystem  \
         $(gccincdir) -pipe 
-NOTHUMB_CPPFLAGS_EXTRA = -march=armv4t -mlong-calls -mtune=arm7tdmi-s -DCONFIG_ARM -D__ARM__ #-mthumb-interwork 
+NOTHUMB_CPPFLAGS_EXTRA = -march=armv4t -mlong-calls -mtune=arm7tdmi-s -DCONFIG_ARM -D__ARM__ -mthumb-interwork 
 
 
 src/isr.o: src/isr.c

config.mk

@@ -26,7 +26,7 @@
 # clean the slate ...
 PLATFORM_LDFLAGS =
 PLATFORM_RELFLAGS = -fno-strict-aliasing  -fno-common -ffixed-r8 -ffunction-sections -msoft-float
-PLATFORM_CPPFLAGS = -march=armv4t -mlong-calls -mtune=arm7tdmi-s -DCONFIG_ARM -D__ARM__ #-mcallee-super-interworking -mthumb -mthumb-interwork
+PLATFORM_CPPFLAGS = -march=armv4t -mlong-calls -mtune=arm7tdmi-s -DCONFIG_ARM -D__ARM__ -mcallee-super-interworking -mthumb -mthumb-interwork
 TEXT_BASE = 0x00400000
 
 #########################################################################

src/start.S

@@ -113,13 +113,13 @@ _begin:
  	mov     sp,r1
 
 // 	msr     cpsr_c,#(USR_MODE | I_BIT | F_BIT)
-// 	add     r1,r1,#usr_stack_size
-// 	mov     sp,r1
-
 
 	bl _rom_data_init+.-base
-	msr     cpsr_c,#(SVC_MODE) // turn on interrupts --- for debug only	
-//	swi
+	msr     cpsr_c,#(SVC_MODE) // turn on interrupts --- for debug only
+//	msr     cpsr_c,#(USR_MODE) // turn on interrupts --- for debug only		
+// 	add     r1,r1,#usr_stack_size
+// 	mov     sp,r1
+	
 	b main
 	
 _undefined_instruction:	.word undefined_instruction

tests/tmr-ints.c

@@ -124,8 +124,10 @@ void main(void) {
 
 	/* go into user mode to handle IRQs */
 	/* disabling interrupts is now difficult */
- 	asm("msr     cpsr_c,#(0x10)");
-
+ 	asm(".code 32;"
+	    "msr     cpsr_c,#(0x10);"
+	    ".code 16; ");
+	
 	while(1) {
 		/* sit here and let the interrupts do the work */
 	};