make things work

mips/arch.ccp

@@ -260,11 +260,15 @@ void kMemory_arch_unmap (kMemory *mem, kPage *page, unsigned address):
 	free_page (t, p)
 
 kPage *kMemory_arch_get_mapping (kMemory *mem, unsigned address, bool *readonly):
-	if address >= 0x80000000:
+	if address >= 0x80000000 || !mem->arch.directory:
 		return NULL
 	unsigned *table = mem->arch.directory[address >> 21]
+	if !table:
+		return NULL
 	unsigned idx = (address >> 12) & ((1 << 9) - 1)
 	arch_page *page = (arch_page *)table[idx + 0x200]
+	if !page:
+		return NULL
 	if readonly:
 		*readonly = !(table[idx] & 4)
 	return page->page

mips/init.ccp

@@ -116,6 +116,9 @@ static void init_threads ():
 	first_alarm = NULL
 	kReceiver *init_receiver = NULL
 	for unsigned i = 0; i < NUM_THREADS; ++i:
+		dbg_log ("Starting thread ")
+		dbg_log_num (i, 2)
+		dbg_log ("\n")
 		kMemory *mem = top_memory.alloc_memory ()
 		assert (mem)
 		kThread *thread = mem->alloc_thread (NUM_SLOTS)

mips/nanonote/Makefile.arch

@@ -18,7 +18,7 @@
 load = 0x80000000
 
 ARCH_CXXFLAGS = -DNUM_THREADS=6
-ARCH_CPPFLAGS = -I. -Imips -Imips/nanonote -Wa,-mips32 -DNANONOTE #-DUSE_SERIAL
+ARCH_CPPFLAGS = -I. -Imips -Imips/nanonote -Wa,-mips32 -DNANONOTE -DUSE_SERIAL
 CROSS = mipsel-linux-gnu-
 OBJDUMP = $(CROSS)objdump
 junk = mdebug.abi32 reginfo comment pdr
@@ -56,7 +56,7 @@ mips/init.o: TARGET_FLAGS = -I/usr/include
 $(addsuffix .elf,$(boot_threads)): TARGET_FLAGS = -I.
 $(addsuffix .elf,$(boot_threads)): LDFLAGS = -EL
 $(addprefix boot-programs/,$(addsuffix .cc,$(boot_threads))): devices.hh keys.hh
-lcd.elf: boot-programs/charset.data
+boot-programs/lcd.o: boot-programs/charset.data
 
 boot-programs/charset.data: boot-programs/charset
 	$< > $@