From e13e318c3748a0db8e2a81447fb8e234a6c2581b Mon Sep 17 00:00:00 2001
From: Jens Arnold <amiconn@rockbox.org>
Date: Thu, 30 Oct 2008 00:17:45 +0000
Subject: Use the asm optimised UCL decompressor for the flash bootloader as
 well. Verified working on Player, Recorder v1, Ondio SP and Ondio FM.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18928 a1c6a512-1295-4272-9138-f99709370657
---
 flash/bootloader/Makefile       |  9 ++++--
 flash/bootloader/bootloader.c   | 69 +----------------------------------------
 flash/bootloader/bootloader.h   |  1 +
 flash/bootloader/bootloader.lds |  2 +-
 flash/bootloader/no_rom.lds     |  2 +-
 5 files changed, 10 insertions(+), 73 deletions(-)

diff --git a/flash/bootloader/Makefile b/flash/bootloader/Makefile
index e7bd17aae9..edc32113c6 100644
--- a/flash/bootloader/Makefile
+++ b/flash/bootloader/Makefile
@@ -46,7 +46,7 @@ endif
 
 SRC := $(wildcard *.c)
 
-OBJS := $(SRC:%.c=$(OBJDIR)/%.o)
+OBJS := $(SRC:%.c=$(OBJDIR)/%.o) $(OBJDIR)/sh_nrv2e_d8.o
 
 ifdef NO_ROM
 LINKFILE = $(OBJDIR)/no_rom.lds
@@ -64,9 +64,12 @@ ifndef NO_ROM
 	$(TOOLSDIR)/scramble $(OBJDIR)/$(TARGET).bin $(OBJDIR)/$(TARGET).ajz
 endif
 
-$(OBJDIR)/$(TARGET).elf : $(OBJS) 
-	$(CC) -Os -nostdlib -o $(OBJDIR)/$(TARGET).elf -L$(OBJDIR) -T$(LINKFILE) -Wl,-Map,$(OBJDIR)/$(TARGET).map
+$(OBJDIR)/$(TARGET).elf : $(OBJS)
+	$(CC) -Os -nostdlib -o $@ $(OBJS) -T$(LINKFILE) -Wl,-Map,$(OBJDIR)/$(TARGET).map
 
+# cross-reference, saves code duplication
+$(OBJDIR)/sh_nrv2e_d8.o : ../../firmware/decompressor/sh_nrv2e_d8.S
+	$(CC) $(CFLAGS) -c $< -o $@
 
 clean:
 	-rm -f \
diff --git a/flash/bootloader/bootloader.c b/flash/bootloader/bootloader.c
index d1955c2ccd..40c0dc5c54 100644
--- a/flash/bootloader/bootloader.c
+++ b/flash/bootloader/bootloader.c
@@ -29,7 +29,6 @@
 
 // prototypes
 static void PlatformInit(void);
-static int ucl_nrv2e_decompress_8(const UINT8 *src, UINT8 *dst, UINT32* dst_len);
 static void DecompressStart(tImage* pImage);
 #ifdef USE_ADC
 static int ReadADC(int channel);
@@ -41,7 +40,7 @@ static void SetLed(BOOL bOn);
 static void UartInit(void);
 static UINT8 UartRead(void);
 static void UartWrite(UINT8 byte);
-static void MiniMon(void);
+static void MiniMon(void);    
 
 
 #ifdef NO_ROM
@@ -188,72 +187,6 @@ static void PlatformInit(void)
 }
 
 
-/* Thinned out version of the UCL 2e decompression sourcecode
- * Original (C) Markus F.X.J Oberhumer under GNU GPL license */
-#define GETBIT(bb, src, ilen) \
-    (((bb = bb & 0x7f ? bb*2 : ((unsigned)src[ilen++]*2+1)) >> 8) & 1)
-
-static int ucl_nrv2e_decompress_8(
-    const UINT8 *src, UINT8 *dst, UINT32* dst_len)
-{
-    UINT32 bb = 0;
-    unsigned ilen = 0, olen = 0, last_m_off = 1;
-
-    for (;;)
-    {
-        unsigned m_off, m_len;
-
-        while (GETBIT(bb,src,ilen))
-        {
-            dst[olen++] = src[ilen++];
-        }
-        m_off = 1;
-        for (;;)
-        {
-            m_off = m_off*2 + GETBIT(bb,src,ilen);
-            if (GETBIT(bb,src,ilen)) break;
-            m_off = (m_off-1)*2 + GETBIT(bb,src,ilen);
-        }
-        if (m_off == 2)
-        {
-            m_off = last_m_off;
-            m_len = GETBIT(bb,src,ilen);
-        }
-        else
-        {
-            m_off = (m_off-3)*256 + src[ilen++];
-            if (m_off == 0xffffffff)
-                break;
-            m_len = (m_off ^ 0xffffffff) & 1;
-            m_off >>= 1;
-            last_m_off = ++m_off;
-        }
-        if (m_len)
-            m_len = 1 + GETBIT(bb,src,ilen);
-        else if (GETBIT(bb,src,ilen))
-            m_len = 3 + GETBIT(bb,src,ilen);
-        else
-        {
-            m_len++;
-            do {
-                m_len = m_len*2 + GETBIT(bb,src,ilen);
-            } while (!GETBIT(bb,src,ilen));
-            m_len += 3;
-        }
-        m_len += (m_off > 0x500);
-        {
-            const UINT8 *m_pos;
-            m_pos = dst + olen - m_off;
-            dst[olen++] = *m_pos++;
-            do dst[olen++] = *m_pos++; while (--m_len > 0);
-        }
-    }
-    *dst_len = olen;
-
-    return ilen;
-}
-
-
 /* move the image into place and start it */
 static void DecompressStart(tImage* pImage)
 {
diff --git a/flash/bootloader/bootloader.h b/flash/bootloader/bootloader.h
index 948311f55d..5811fd0aa4 100644
--- a/flash/bootloader/bootloader.h
+++ b/flash/bootloader/bootloader.h
@@ -77,6 +77,7 @@ typedef struct
 #define FW_VERSION *(unsigned short*)(FLASH_BASE + 0xFE) // firmware version
 
 // prototypes
+int ucl_nrv2e_decompress_8(const UINT8 *src, UINT8 *dst, UINT32* dst_len);
 void _main(void) __attribute__ ((section (".startup")));
 int main(void);
 
diff --git a/flash/bootloader/bootloader.lds b/flash/bootloader/bootloader.lds
index 143d83bdc7..ecc1268988 100644
--- a/flash/bootloader/bootloader.lds
+++ b/flash/bootloader/bootloader.lds
@@ -1,5 +1,4 @@
 OUTPUT_FORMAT(elf32-sh)
-INPUT(bootloader.o)
 
 MEMORY
 {
@@ -19,6 +18,7 @@ SECTIONS
 	.text :
 	{	 
 		*(.text)	
+		*(.icode)
 		. = ALIGN(0x4);
 	} > IRAM
 	
diff --git a/flash/bootloader/no_rom.lds b/flash/bootloader/no_rom.lds
index e65e7fdd3c..796fbda4fb 100644
--- a/flash/bootloader/no_rom.lds
+++ b/flash/bootloader/no_rom.lds
@@ -2,7 +2,6 @@
    where the flash ROM is mirrored to address zero */
 
 OUTPUT_FORMAT(elf32-sh)
-INPUT(bootloader.o)
 
 MEMORY
 {
@@ -29,6 +28,7 @@ SECTIONS
 	{	 
 		_begin_text = .;
 		*(.text)	
+		*(.icode)
 		. = ALIGN(0x4);
 		_end_text = .;
 	} > IRAM
-- 
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