YABEL update

- drop x86emu + old biosemu in favor of YABEL
- Add YABEL_DIRECTHW to get the old biosemu behavior
- add support for vesa console using YABEL
- add coreboot table entry with console information
- add bootsplash support (reads /bootsplash.jpg from CBFS)

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Pattrick Hueper <phueper@hueper.net>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5135 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

9 files changed, 1188 insertions, 46 deletions

diff --git a/src/arch/i386/boot/coreboot_table.c b/src/arch/i386/boot/coreboot_table.c
index e766463255..f3b7f6daca 100644
--- a/src/arch/i386/boot/coreboot_table.c
+++ b/src/arch/i386/boot/coreboot_table.c
@@ -148,6 +148,19 @@ static void lb_console(struct lb_header *header)
 #endif
 }
 
+static void lb_framebuffer(struct lb_header *header)
+{
+#if defined(CONFIG_BOOTSPLASH) && CONFIG_BOOTSPLASH && CONFIG_COREBOOT_KEEP_FRAMEBUFFER
+	void fill_lb_framebuffer(struct lb_framebuffer *framebuffer);
+
+	struct lb_framebuffer *framebuffer;
+	framebuffer = (struct lb_framebuffer *)lb_new_record(header);
+	framebuffer->tag = LB_TAG_FRAMEBUFFER;
+	framebuffer->size = sizeof(*framebuffer);
+	fill_lb_framebuffer(framebuffer);
+#endif
+}
+
 static struct lb_mainboard *lb_mainboard(struct lb_header *header)
 {
 	struct lb_record *rec;
@@ -565,6 +578,8 @@ unsigned long write_coreboot_table(
 	lb_console(head);
 	/* Record our various random string information */
 	lb_strings(head);
+	/* Record our framebuffer */
+	lb_framebuffer(head);
 
 	/* Remember where my valid memory ranges are */
 	return lb_table_fini(head, 1);
diff --git a/src/arch/i386/include/arch/byteorder.h b/src/arch/i386/include/arch/byteorder.h
index eecd02cf2b..ab344e6394 100644
--- a/src/arch/i386/include/arch/byteorder.h
+++ b/src/arch/i386/include/arch/byteorder.h
@@ -14,4 +14,7 @@
 #define cpu_to_be16(x) swab16((x))
 #define be16_to_cpu(x) swab16((x))
 
+#define ntohl(x) be32_to_cpu(x)
+#define htonl(x) cpu_to_be32(x)
+
 #endif /* _BYTEORDER_H */
diff --git a/src/devices/Kconfig b/src/devices/Kconfig
index 42c47bc19c..8211bf30f5 100644
--- a/src/devices/Kconfig
+++ b/src/devices/Kconfig
@@ -1,7 +1,7 @@
 ##
 ## This file is part of the coreboot project.
 ##
-## Copyright (C) 2007 coresystems GmbH
+## Copyright (C) 2007-2010 coresystems GmbH
 ## (Written by Stefan Reinauer <stepan@coresystems.de> for coresystems GmbH)
 ##
 ## This program is free software; you can redistribute it and/or modify
@@ -49,7 +49,7 @@ choice
 	depends on PCI_ROM_RUN || VGA_ROM_RUN
 
 config PCI_OPTION_ROM_RUN_REALMODE
-	prompt "Real mode"
+	prompt "Native mode"
 	bool
 	depends on ARCH_X86
 	help
@@ -58,36 +58,59 @@ config PCI_OPTION_ROM_RUN_REALMODE
 	  so this is the fastest, but also the least secure option.
 	  (only works on x86/x64 systems)
 
-config PCI_OPTION_ROM_RUN_X86EMU
-	prompt "x86emu"
+config PCI_OPTION_ROM_RUN_YABEL
+	prompt "Secure Mode"
 	bool
 	help
 	  If you select this option, the x86emu CPU emulator will be used to
-	  execute PCI option ROMs. 
-	  When choosing this option, x86emu will pass through all hardware
-	  accesses to memory and IO devices to the underlying memory and IO
-	  addresses. While this option prevents option ROMs from doing dirty
-	  tricks with the CPU (such as installing SMM modules or hypervisors),
-	  they can still access all devices in the system.
-	  Choosing x86emu, option ROM execution is slower than native execution
-	  in real mode, but faster than the full system emulation YABEL
+	  execute PCI option ROMs.
+	  This option prevents option ROMs from doing dirty tricks with the 
+	  system (such as installing SMM modules or hypervisors), but it is also
+	  significantly slower than the native option ROM initialization method.
 	  This is the default choice for non-x86 systems.
+endchoice
 
-config PCI_OPTION_ROM_RUN_YABEL
-	prompt "YABEL"
-	bool
+# TODO: Describe better, and/or make a "choice" selection for this.
+config YABEL_DEBUG_FLAGS
+	prompt "Hex value for YABEL debug flags"
+	hex
+	default 0x0
+	depends on PCI_OPTION_ROM_RUN_YABEL
 	help
-	  If you select this option, the YABEL system emulator will be used to
-	  execute PCI option ROMs.
-	  YABEL consists of two parts: It uses x86emu for the CPU emulation and
-	  additionally provides a PC system emulation that filters bad device and
-	  memory access (such as PCI config space access to other devices than the
-	  initialized one).
-	  This option best prevents option ROMs from doing dirty tricks with the 
-	  system (such as installing SMM modules or hypervisors), but it is also
-	  significantly slower than the other option ROM initialization methods.
+	  Set CONFIG_YABEL_DEBUG_FLAGS is a binary switch that allows you
+	  to select the following items to debug. 1=on 0=off. After you
+	  decide what you want to debug create the binary value, convert to hex
+	  and set the Option (Ex. CONFIG_YABEL_DEBUG_FLAGS = 0x31FF //Debug All).
+
+	  |-DEBUG_JMP - print info about JMP and RETF opcodes from x86emu
+	  ||-DEBUG_TRACE_X86EMU - print _all_ opcodes that are executed by x86emu (WARNING: this will produce a LOT of output)
+	  |||-Currently unused
+	  ||||-Currently unused
+	  |||||-Currently unused
+	  ||||||-DEBUG_PNP - Print Plug And Play access made by option rom 
+	  |||||||-DEBUG_DISK - Print Disk I/O related messages, currently unused
+	  ||||||||-DEBUG_PMM - Print messages related to POST Memory Manager (PMM)
+	  |||||||||-DEBUG_VBE - Print messages related to VESA BIOS Extension (VBE) functions
+	  ||||||||||-DEBUG_PRINT_INT10 - let INT10 (i.e. character output) calls print messages to Debug output
+	  |||||||||||-DEBUG_INTR - Print messages related to interrupt handling
+	  ||||||||||||-DEBUG_CHECK_VMEM_ACCESS - Print messages related to accesse to certain areas of the virtual Memory (e.g. BDA (BIOS Data Area) or Interrupt Vectors)
+	  |||||||||||||-DEBUG_MEM - Print memory access made by option rom (NOTE: this also includes accesses to fetch instructions)
+	  ||||||||||||||-DEBUG_IO - Print I/O access made by option rom 
+	  11000111111111 - Max Binary Value, Debug All (WARNING: - This could run for hours)
+	
+	  DEBUG_IO		  0x0001
+	  DEBUG_MEM		  0x0002
+	  DEBUG_CHECK_VMEM_ACCESS 0x0004
+	  DEBUG_INTR		  0x0008
+	  DEBUG_PRINT_INT10	  0x0010
+	  DEBUG_VBE		  0x0020
+	  DEBUG_PMM		  0x0040
+	  DEBUG_DISK		  0x0080
+	  DEBUG_PNP		  0x0100
+	  DEBUG_TRACE_X86EMU	  0x1000
+	  DEBUG_JMP		  0x2000
 
-endchoice
+	  See debug.h for values 0 is no debug output, 0x31ff is _verbose_.
 
 config YABEL_PCI_ACCESS_OTHER_DEVICES
 	prompt "Allow option roms to acces other devices"
@@ -102,20 +125,56 @@ config YABEL_PCI_ACCESS_OTHER_DEVICES
 config YABEL_VIRTMEM_LOCATION
 	prompt "Location of YABEL's virtual memory"
 	hex
-	depends on EXPERT
+	depends on PCI_OPTION_ROM_RUN_YABEL && EXPERT
 	default 0x1000000
 	help
 	  YABEL requires 1MB memory for its CPU emulation. This memory is
 	  normally located at 16MB.
 
-# TODO: Describe better, and/or make a "choice" selection for this.
-config YABEL_DEBUG_FLAGS
-	prompt "Hex value for YABEL debug flags"
-	hex
-	default 0x0
+config YABEL_DIRECTHW
+	prompt "Direct Hardware Access"
+	bool
 	depends on PCI_OPTION_ROM_RUN_YABEL
 	help
-	  See debug.h for values 0 is no debug output, 0x31ff is _verbose_.
+	  YABEL consists of two parts: It uses x86emu for the CPU emulation and
+	  additionally provides a PC system emulation that filters bad device and
+	  memory access (such as PCI config space access to other devices than the
+	  initialized one).
+	  When choosing this option, x86emu will pass through all hardware
+	  accesses to memory and IO devices to the underlying memory and IO
+	  addresses. While this option prevents option ROMs from doing dirty
+	  tricks with the CPU (such as installing SMM modules or hypervisors),
+	  they can still access all devices in the system.
+	  Enable this option for a good compromise between security and speed.
+
+config BOOTSPLASH
+	prompt "Show graphical bootsplash"
+	bool
+	depends on PCI_OPTION_ROM_RUN_YABEL
+	help
+	  This option shows a graphical bootsplash screen. The grapics are
+	  loaded from the CBFS file bootsplash.jpg
+
+config FRAMEBUFFER_VESA_MODE
+	prompt "VESA framebuffer video mode"
+	hex
+	default 0x117
+	depends on BOOTSPLASH
+	help
+	  This option sets the resolution used for the coreboot framebuffer and
+	  bootsplash screen. Set to 0x117 for 1024x768x16. A diligent soul will 
+	  some day make this a "choice".
+
+config COREBOOT_KEEP_FRAMEBUFFER
+	prompt "Keep VESA framebuffer"
+	bool
+	depends on BOOTSPLASH
+	help
+	  This option keeps the framebuffer mode set after coreboot finishes
+	  execution. If this option is enabled, coreboot will pass a framebuffer
+	  entry in its coreboot table and the payload will need a framebuffer
+	  driver. If this option is disabled, coreboot will switch back to 
+	  text mode before handing control to a payload.
 
 config CONSOLE_VGA_MULTI
 	bool
diff --git a/src/include/boot/coreboot_tables.h b/src/include/boot/coreboot_tables.h
index 2ba61266c6..476a374cb3 100644
--- a/src/include/boot/coreboot_tables.h
+++ b/src/include/boot/coreboot_tables.h
@@ -159,6 +159,13 @@ struct lb_console {
 	uint16_t type;
 };
 
+#define LB_TAG_CONSOLE_SERIAL8250	0
+#define LB_TAG_CONSOLE_VGA		1
+#define LB_TAG_CONSOLE_BTEXT		2
+#define LB_TAG_CONSOLE_LOGBUF		3
+#define LB_TAG_CONSOLE_SROM		4
+#define LB_TAG_CONSOLE_EHCI		5
+
 #define LB_TAG_FORWARD		0x0011
 struct lb_forward {
 	uint32_t tag;
@@ -166,12 +173,25 @@ struct lb_forward {
 	uint64_t forward;
 };
 
-#define LB_TAG_CONSOLE_SERIAL8250	0
-#define LB_TAG_CONSOLE_VGA		1
-#define LB_TAG_CONSOLE_BTEXT		2
-#define LB_TAG_CONSOLE_LOGBUF		3
-#define LB_TAG_CONSOLE_SROM		4
-#define LB_TAG_CONSOLE_EHCI		5
+#define LB_TAG_FRAMEBUFFER	0x0012
+struct lb_framebuffer {
+	uint32_t tag;
+	uint32_t size;
+
+        uint64_t physical_address;
+        uint32_t x_resolution;
+        uint32_t y_resolution;
+        uint32_t bytes_per_line;
+        uint8_t bits_per_pixel;
+        uint8_t red_mask_pos;
+        uint8_t red_mask_size;
+        uint8_t green_mask_pos;
+        uint8_t green_mask_size;
+        uint8_t blue_mask_pos;
+        uint8_t blue_mask_size;
+        uint8_t reserved_mask_pos;
+        uint8_t reserved_mask_size;
+};
 
 /* The following structures are for the cmos definitions table */
 #define LB_TAG_CMOS_OPTION_TABLE 200
diff --git a/src/lib/Makefile.inc b/src/lib/Makefile.inc
index b94906b30f..cbff717c32 100644
--- a/src/lib/Makefile.inc
+++ b/src/lib/Makefile.inc
@@ -26,6 +26,8 @@ initobj-y += lzma.o
 obj-$(CONFIG_USBDEBUG_DIRECT) += usbdebug_direct.o
 obj-$(CONFIG_COMPRESSED_PAYLOAD_LZMA) += lzma.o
 
+obj-$(CONFIG_BOOTSPLASH) += jpeg.o
+
 ifdef POST_EVALUATION
 $(obj)/lib/version.o :: $(obj)/build.h
 endif
diff --git a/src/lib/cbfs.c b/src/lib/cbfs.c
index f99f666d3c..0bb6e838fb 100644
--- a/src/lib/cbfs.c
+++ b/src/lib/cbfs.c
@@ -22,13 +22,7 @@
 #include <console/console.h>
 #include <cbfs.h>
 #include <lib.h>
-
-#ifndef CONFIG_BIG_ENDIAN
-#define ntohl(x) ( ((x&0xff)<<24) | ((x&0xff00)<<8) | \
-		((x&0xff0000) >> 8) | ((x&0xff000000) >> 24) )
-#else
-#define ntohl(x) (x)
-#endif
+#include <arch/byteorder.h>
 
 int cbfs_decompress(int algo, void *src, void *dst, int len)
 {
@@ -213,7 +207,7 @@ void * cbfs_load_stage(const char *name)
 
 void * cbfs_get_file(const char *name)
 {
-	return cbfs_find(name);
+	return (void *) cbfs_find(name);
 }
 
 int cbfs_execute_stage(const char *name)
diff --git a/src/lib/fallback_boot.c b/src/lib/fallback_boot.c
index 59476fdf2a..b969b6b5cf 100644
--- a/src/lib/fallback_boot.c
+++ b/src/lib/fallback_boot.c
@@ -30,6 +30,11 @@ void set_boot_successful(void)
 
 void boot_successful(void)
 {
+#if defined(CONFIG_BOOTSPLASH) && CONFIG_BOOTSPLASH && !CONFIG_COREBOOT_KEEP_FRAMEBUFFER
+	void vbe_textmode_console(void);
+
+	vbe_textmode_console();
+#endif
 	/* Remember this was a successful boot */
 	set_boot_successful();
 
diff --git a/src/lib/jpeg.c b/src/lib/jpeg.c
new file mode 100644
index 0000000000..b7c0004708
--- /dev/null
+++ b/src/lib/jpeg.c
@@ -0,0 +1,988 @@
+/*
+ * This file is part of the coreboot project.
+ * 
+ * Copyright (C) 2001 by Michael Schroeder
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; version 2 of
+ * the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+/*
+ * a tiny jpeg decoder.
+ *
+ * written in August 2001 by Michael Schroeder <mls@suse.de>
+ *
+ */
+
+#define __LITTLE_ENDIAN
+#include <string.h>
+#include "jpeg.h"
+#define ISHIFT 11
+
+#define IFIX(a) ((int)((a) * (1 << ISHIFT) + .5))
+#define IMULT(a, b) (((a) * (b)) >> ISHIFT)
+#define ITOINT(a) ((a) >> ISHIFT)
+
+#ifndef __P
+# define __P(x) x
+#endif
+
+/* special markers */
+#define M_BADHUFF	-1
+#define M_EOF		0x80
+
+struct in {
+	unsigned char *p;
+	unsigned int bits;
+	int left;
+	int marker;
+
+	int (*func) __P((void *));
+	void *data;
+};
+
+/*********************************/
+struct dec_hufftbl;
+struct enc_hufftbl;
+
+union hufftblp {
+	struct dec_hufftbl *dhuff;
+	struct enc_hufftbl *ehuff;
+};
+
+struct scan {
+	int dc;			/* old dc value */
+
+	union hufftblp hudc;
+	union hufftblp huac;
+	int next;		/* when to switch to next scan */
+
+	int cid;		/* component id */
+	int hv;			/* horiz/vert, copied from comp */
+	int tq;			/* quant tbl, copied from comp */
+};
+
+/*********************************/
+
+#define DECBITS 10		/* seems to be the optimum */
+
+struct dec_hufftbl {
+	int maxcode[17];
+	int valptr[16];
+	unsigned char vals[256];
+	unsigned int llvals[1 << DECBITS];
+};
+
+static void decode_mcus __P((struct in *, int *, int, struct scan *, int *));
+static int dec_readmarker __P((struct in *));
+static void dec_makehuff __P((struct dec_hufftbl *, int *, unsigned char *));
+
+static void setinput __P((struct in *, unsigned char *));
+/*********************************/
+
+#undef PREC
+#define PREC int
+
+static void idctqtab __P((unsigned char *, PREC *));
+static void idct __P((int *, int *, PREC *, PREC, int));
+static void scaleidctqtab __P((PREC *, PREC));
+
+/*********************************/
+
+static void initcol __P((PREC[][64]));
+
+static void col221111 __P((int *, unsigned char *, int));
+static void col221111_16 __P((int *, unsigned char *, int));
+static void col221111_32 __P((int *, unsigned char *, int));
+
+/*********************************/
+
+#define M_SOI	0xd8
+#define M_APP0	0xe0
+#define M_DQT	0xdb
+#define M_SOF0	0xc0
+#define M_DHT   0xc4
+#define M_DRI	0xdd
+#define M_SOS	0xda
+#define M_RST0	0xd0
+#define M_EOI	0xd9
+#define M_COM	0xfe
+
+static unsigned char *datap;
+
+static int getbyte(void)
+{
+	return *datap++;
+}
+
+static int getword(void)
+{
+	int c1, c2;
+	c1 = *datap++;
+	c2 = *datap++;
+	return c1 << 8 | c2;
+}
+
+struct comp {
+	int cid;
+	int hv;
+	int tq;
+};
+
+#define MAXCOMP 4
+struct jpginfo {
+	int nc;			/* number of components */
+	int ns;			/* number of scans */
+	int dri;		/* restart interval */
+	int nm;			/* mcus til next marker */
+	int rm;			/* next restart marker */
+};
+
+static struct jpginfo info;
+static struct comp comps[MAXCOMP];
+
+static struct scan dscans[MAXCOMP];
+
+static unsigned char quant[4][64];
+
+static struct dec_hufftbl dhuff[4];
+
+#define dec_huffdc (dhuff + 0)
+#define dec_huffac (dhuff + 2)
+
+static struct in in;
+
+static int readtables(int till)
+{
+	int m, l, i, j, lq, pq, tq;
+	int tc, th, tt;
+
+	for (;;) {
+		if (getbyte() != 0xff)
+			return -1;
+		if ((m = getbyte()) == till)
+			break;
+
+		switch (m) {
+		case 0xc2:
+			return 0;
+
+		case M_DQT:
+			lq = getword();
+			while (lq > 2) {
+				pq = getbyte();
+				tq = pq & 15;
+				if (tq > 3)
+					return -1;
+				pq >>= 4;
+				if (pq != 0)
+					return -1;
+				for (i = 0; i < 64; i++)
+					quant[tq][i] = getbyte();
+				lq -= 64 + 1;
+			}
+			break;
+
+		case M_DHT:
+			l = getword();
+			while (l > 2) {
+				int hufflen[16], k;
+				unsigned char huffvals[256];
+
+				tc = getbyte();
+				th = tc & 15;
+				tc >>= 4;
+				tt = tc * 2 + th;
+				if (tc > 1 || th > 1)
+					return -1;
+				for (i = 0; i < 16; i++)
+					hufflen[i] = getbyte();
+				l -= 1 + 16;
+				k = 0;
+				for (i = 0; i < 16; i++) {
+					for (j = 0; j < hufflen[i]; j++)
+						huffvals[k++] = getbyte();
+					l -= hufflen[i];
+				}
+				dec_makehuff(dhuff + tt, hufflen,
+					     huffvals);
+			}
+			break;
+
+		case M_DRI:
+			l = getword();
+			info.dri = getword();
+			break;
+
+		default:
+			l = getword();
+			while (l-- > 2)
+				getbyte();
+			break;
+		}
+	}
+	return 0;
+}
+
+static void dec_initscans(void)
+{
+	int i;
+
+	info.nm = info.dri + 1;
+	info.rm = M_RST0;
+	for (i = 0; i < info.ns; i++)
+		dscans[i].dc = 0;
+}
+
+static int dec_checkmarker(void)
+{
+	int i;
+
+	if (dec_readmarker(&in) != info.rm)
+		return -1;
+	info.nm = info.dri;
+	info.rm = (info.rm + 1) & ~0x08;
+	for (i = 0; i < info.ns; i++)
+		dscans[i].dc = 0;
+	return 0;
+}
+
+int jpeg_check_size(unsigned char *buf, int width, int height)
+{
+  	datap = buf;
+	getbyte();
+	getbyte();
+	readtables(M_SOF0);
+	getword();
+	getbyte();
+        if (height != getword() || width != getword())
+		return 0;
+        return 1;
+}
+
+int jpeg_decode(unsigned char *buf, unsigned char *pic, 
+		int width, int height, int depth, struct jpeg_decdata *decdata)
+{
+	int i, j, m, tac, tdc;
+	int mcusx, mcusy, mx, my;
+	int max[6];
+
+	if (!decdata || !buf || !pic)
+		return -1;
+	datap = buf;
+	if (getbyte() != 0xff)
+		return ERR_NO_SOI;
+	if (getbyte() != M_SOI)
+		return ERR_NO_SOI;
+	if (readtables(M_SOF0))
+		return ERR_BAD_TABLES;
+	getword();
+	i = getbyte();
+	if (i != 8)
+		return ERR_NOT_8BIT;
+	if (((getword() + 15) & ~15) != height)
+		return ERR_HEIGHT_MISMATCH;
+	if (((getword() + 15) & ~15) != width)
+		return ERR_WIDTH_MISMATCH;
+	if ((height & 15) || (width & 15))
+		return ERR_BAD_WIDTH_OR_HEIGHT;
+	info.nc = getbyte();
+	if (info.nc > MAXCOMP)
+		return ERR_TOO_MANY_COMPPS;
+	for (i = 0; i < info.nc; i++) {
+		int h, v;
+		comps[i].cid = getbyte();
+		comps[i].hv = getbyte();
+		v = comps[i].hv & 15;
+		h = comps[i].hv >> 4;
+		comps[i].tq = getbyte();
+		if (h > 3 || v > 3)
+			return ERR_ILLEGAL_HV;
+		if (comps[i].tq > 3)
+			return ERR_QUANT_TABLE_SELECTOR;
+	}
+	if (readtables(M_SOS))
+		return ERR_BAD_TABLES;
+	getword();
+	info.ns = getbyte();
+	if (info.ns != 3)
+		return ERR_NOT_YCBCR_221111;
+	for (i = 0; i < 3; i++) {
+		dscans[i].cid = getbyte();
+		tdc = getbyte();
+		tac = tdc & 15;
+		tdc >>= 4;
+		if (tdc > 1 || tac > 1)
+			return ERR_QUANT_TABLE_SELECTOR;
+		for (j = 0; j < info.nc; j++)
+			if (comps[j].cid == dscans[i].cid)
+				break;
+		if (j == info.nc)
+			return ERR_UNKNOWN_CID_IN_SCAN;
+		dscans[i].hv = comps[j].hv;
+		dscans[i].tq = comps[j].tq;
+		dscans[i].hudc.dhuff = dec_huffdc + tdc;
+		dscans[i].huac.dhuff = dec_huffac + tac;
+	}
+
+	i = getbyte();
+	j = getbyte();
+	m = getbyte();
+
+	if (i != 0 || j != 63 || m != 0)
+		return ERR_NOT_SEQUENTIAL_DCT;
+
+	if (dscans[0].cid != 1 || dscans[1].cid != 2 || dscans[2].cid != 3)
+		return ERR_NOT_YCBCR_221111;
+
+	if (dscans[0].hv != 0x22 || dscans[1].hv != 0x11 || dscans[2].hv != 0x11)
+		return ERR_NOT_YCBCR_221111;
+
+	mcusx = width >> 4;
+	mcusy = height >> 4;
+
+
+	idctqtab(quant[dscans[0].tq], decdata->dquant[0]);
+	idctqtab(quant[dscans[1].tq], decdata->dquant[1]);
+	idctqtab(quant[dscans[2].tq], decdata->dquant[2]);
+	initcol(decdata->dquant);
+	setinput(&in, datap);
+
+#if 0
+	/* landing zone */
+	img[len] = 0;
+	img[len + 1] = 0xff;
+	img[len + 2] = M_EOF;
+#endif
+
+	dec_initscans();
+
+	dscans[0].next = 6 - 4;
+	dscans[1].next = 6 - 4 - 1;
+	dscans[2].next = 6 - 4 - 1 - 1;	/* 411 encoding */
+	for (my = 0; my < mcusy; my++) {
+		for (mx = 0; mx < mcusx; mx++) {
+			if (info.dri && !--info.nm)
+				if (dec_checkmarker())
+					return ERR_WRONG_MARKER;
+
+			decode_mcus(&in, decdata->dcts, 6, dscans, max);
+			idct(decdata->dcts, decdata->out, decdata->dquant[0], IFIX(128.5), max[0]);
+			idct(decdata->dcts + 64, decdata->out + 64, decdata->dquant[0], IFIX(128.5), max[1]);
+			idct(decdata->dcts + 128, decdata->out + 128, decdata->dquant[0], IFIX(128.5), max[2]);
+			idct(decdata->dcts + 192, decdata->out + 192, decdata->dquant[0], IFIX(128.5), max[3]);
+			idct(decdata->dcts + 256, decdata->out + 256, decdata->dquant[1], IFIX(0.5), max[4]);
+			idct(decdata->dcts + 320, decdata->out + 320, decdata->dquant[2], IFIX(0.5), max[5]);
+
+			switch (depth) {
+			case 32:
+				col221111_32(decdata->out, pic + (my * 16 * mcusx + mx) * 16 * 4, mcusx * 16 * 4);
+				break;
+			case 24:
+				col221111(decdata->out, pic + (my * 16 * mcusx + mx) * 16 * 3, mcusx * 16 * 3);
+				break;
+			case 16:
+				col221111_16(decdata->out, pic + (my * 16 * mcusx + mx) * (16 * 2), mcusx * (16 * 2));
+				break;
+			default:
+				return ERR_DEPTH_MISMATCH;
+				break;
+			}
+		}
+	}
+
+	m = dec_readmarker(&in);
+	if (m != M_EOI)
+		return ERR_NO_EOI;
+
+	return 0;
+}
+
+/****************************************************************/
+/**************       huffman decoder             ***************/
+/****************************************************************/
+
+static int fillbits __P((struct in *, int, unsigned int));
+static int dec_rec2
+__P((struct in *, struct dec_hufftbl *, int *, int, int));
+
+static void setinput(struct in *in, unsigned char *p)
+{
+	in->p = p;
+	in->left = 0;
+	in->bits = 0;
+	in->marker = 0;
+}
+
+static int fillbits(struct in *in, int le, unsigned int bi)
+{
+	int b, m;
+
+	if (in->marker) {
+		if (le <= 16)
+			in->bits = bi << 16, le += 16;
+		return le;
+	}
+	while (le <= 24) {
+		b = *in->p++;
+		if (b == 0xff && (m = *in->p++) != 0) {
+			if (m == M_EOF) {
+				if (in->func && (m = in->func(in->data)) == 0)
+					continue;
+			}
+			in->marker = m;
+			if (le <= 16)
+				bi = bi << 16, le += 16;
+			break;
+		}
+		bi = bi << 8 | b;
+		le += 8;
+	}
+	in->bits = bi;		/* tmp... 2 return values needed */
+	return le;
+}
+
+static int dec_readmarker(struct in *in)
+{
+	int m;
+
+	in->left = fillbits(in, in->left, in->bits);
+	if ((m = in->marker) == 0)
+		return 0;
+	in->left = 0;
+	in->marker = 0;
+	return m;
+}
+
+#define LEBI_DCL	int le, bi
+#define LEBI_GET(in)	(le = in->left, bi = in->bits)
+#define LEBI_PUT(in)	(in->left = le, in->bits = bi)
+
+#define GETBITS(in, n) (					\
+  (le < (n) ? le = fillbits(in, le, bi), bi = in->bits : 0),	\
+  (le -= (n)),							\
+  bi >> le & ((1 << (n)) - 1)					\
+)
+
+#define UNGETBITS(in, n) (	\
+  le += (n)			\
+)
+
+
+static int dec_rec2(struct in *in, struct dec_hufftbl *hu, int *runp, int c,
+		int i)
+{
+	LEBI_DCL;
+
+	LEBI_GET(in);
+	if (i) {
+		UNGETBITS(in, i & 127);
+		*runp = i >> 8 & 15;
+		i >>= 16;
+	} else {
+		for (i = DECBITS; (c = ((c << 1) | GETBITS(in, 1))) >= (hu->maxcode[i]); i++);
+		if (i >= 16) {
+			in->marker = M_BADHUFF;
+			return 0;
+		}
+		i = hu->vals[hu->valptr[i] + c - hu->maxcode[i - 1] * 2];
+		*runp = i >> 4;
+		i &= 15;
+	}
+	if (i == 0) {		/* sigh, 0xf0 is 11 bit */
+		LEBI_PUT(in);
+		return 0;
+	}
+	/* receive part */
+	c = GETBITS(in, i);
+	if (c < (1 << (i - 1)))
+		c += (-1 << i) + 1;
+	LEBI_PUT(in);
+	return c;
+}
+
+#define DEC_REC(in, hu, r, i)	 (	\
+  r = GETBITS(in, DECBITS),		\
+  i = hu->llvals[r],			\
+  i & 128 ?				\
+    (					\
+      UNGETBITS(in, i & 127),		\
+      r = i >> 8 & 15,			\
+      i >> 16				\
+    )					\
+  :					\
+    (					\
+      LEBI_PUT(in),			\
+      i = dec_rec2(in, hu, &r, r, i),	\
+      LEBI_GET(in),			\
+      i					\
+    )					\
+)
+
+static void decode_mcus(struct in *in, int *dct, int n, struct scan *sc, int *maxp)
+{
+	struct dec_hufftbl *hu;
+	int i, r, t;
+	LEBI_DCL;
+
+	memset(dct, 0, n * 64 * sizeof(*dct));
+	LEBI_GET(in);
+	while (n-- > 0) {
+		hu = sc->hudc.dhuff;
+		*dct++ = (sc->dc += DEC_REC(in, hu, r, t));
+
+		hu = sc->huac.dhuff;
+		i = 63;
+		while (i > 0) {
+			t = DEC_REC(in, hu, r, t);
+			if (t == 0 && r == 0) {
+				dct += i;
+				break;
+			}
+			dct += r;
+			*dct++ = t;
+			i -= r + 1;
+		}
+		*maxp++ = 64 - i;
+		if (n == sc->next)
+			sc++;
+	}
+	LEBI_PUT(in);
+}
+
+static void dec_makehuff(struct dec_hufftbl *hu, int *hufflen, unsigned char *huffvals)
+{
+	int code, k, i, j, d, x, c, v;
+	for (i = 0; i < (1 << DECBITS); i++)
+		hu->llvals[i] = 0;
+
+/*
+ * llvals layout:
+ *
+ * value v already known, run r, backup u bits:
+ *  vvvvvvvvvvvvvvvv 0000 rrrr 1 uuuuuuu
+ * value unknown, size b bits, run r, backup u bits:
+ *  000000000000bbbb 0000 rrrr 0 uuuuuuu
+ * value and size unknown:
+ *  0000000000000000 0000 0000 0 0000000
+ */
+	code = 0;
+	k = 0;
+	for (i = 0; i < 16; i++, code <<= 1) {	/* sizes */
+		hu->valptr[i] = k;
+		for (j = 0; j < hufflen[i]; j++) {
+			hu->vals[k] = *huffvals++;
+			if (i < DECBITS) {
+				c = code << (DECBITS - 1 - i);
+				v = hu->vals[k] & 0x0f;	/* size */
+				for (d = 1 << (DECBITS - 1 - i); --d >= 0;) {
+					if (v + i < DECBITS) {	/* both fit in table */
+						x = d >> (DECBITS - 1 - v -
+							  i);
+						if (v && x < (1 << (v - 1)))
+							x += (-1 << v) + 1;
+						x = x << 16 | (hu-> vals[k] & 0xf0) << 4 |
+							(DECBITS - (i + 1 + v)) | 128;
+					} else
+						x = v << 16 | (hu-> vals[k] & 0xf0) << 4 |
+						        (DECBITS - (i + 1));
+					hu->llvals[c | d] = x;
+				}
+			}
+			code++;
+			k++;
+		}
+		hu->maxcode[i] = code;
+	}
+	hu->maxcode[16] = 0x20000;	/* always terminate decode */
+}
+
+/****************************************************************/
+/**************             idct                  ***************/
+/****************************************************************/
+
+#define ONE ((PREC)IFIX(1.))
+#define S2  ((PREC)IFIX(0.382683432))
+#define C2  ((PREC)IFIX(0.923879532))
+#define C4  ((PREC)IFIX(0.707106781))
+
+#define S22 ((PREC)IFIX(2 * 0.382683432))
+#define C22 ((PREC)IFIX(2 * 0.923879532))
+#define IC4 ((PREC)IFIX(1 / 0.707106781))
+
+#define C3IC1 ((PREC)IFIX(0.847759065))	/* c3/c1 */
+#define C5IC1 ((PREC)IFIX(0.566454497))	/* c5/c1 */
+#define C7IC1 ((PREC)IFIX(0.198912367))	/* c7/c1 */
+
+#define XPP(a,b) (t = a + b, b = a - b, a = t)
+#define XMP(a,b) (t = a - b, b = a + b, a = t)
+#define XPM(a,b) (t = a + b, b = b - a, a = t)
+
+#define ROT(a,b,s,c) (	t = IMULT(a + b, s),	\
+			a = IMULT(a, c - s) + t,	\
+			b = IMULT(b, c + s) - t)
+
+#define IDCT		\
+(			\
+  XPP(t0, t1),		\
+  XMP(t2, t3),		\
+  t2 = IMULT(t2, IC4) - t3,	\
+  XPP(t0, t3),		\
+  XPP(t1, t2),		\
+  XMP(t4, t7),		\
+  XPP(t5, t6),		\
+  XMP(t5, t7),		\
+  t5 = IMULT(t5, IC4),	\
+  ROT(t4, t6, S22, C22),\
+  t6 -= t7,		\
+  t5 -= t6,		\
+  t4 -= t5,		\
+  XPP(t0, t7),		\
+  XPP(t1, t6),		\
+  XPP(t2, t5),		\
+  XPP(t3, t4)		\
+)
+
+static unsigned char zig2[64] = {
+	0, 2, 3, 9, 10, 20, 21, 35,
+	14, 16, 25, 31, 39, 46, 50, 57,
+	5, 7, 12, 18, 23, 33, 37, 48,
+	27, 29, 41, 44, 52, 55, 59, 62,
+	15, 26, 30, 40, 45, 51, 56, 58,
+	1, 4, 8, 11, 19, 22, 34, 36,
+	28, 42, 43, 53, 54, 60, 61, 63,
+	6, 13, 17, 24, 32, 38, 47, 49
+};
+
+void idct(int *in, int *out, PREC *quant, PREC off, int max)
+{
+	PREC t0, t1, t2, t3, t4, t5, t6, t7, t;
+	PREC tmp[64], *tmpp;
+	int i, j;
+	unsigned char *zig2p;
+
+	t0 = off;
+	if (max == 1) {
+		t0 += in[0] * quant[0];
+		for (i = 0; i < 64; i++)
+			out[i] = ITOINT(t0);
+		return;
+	}
+	zig2p = zig2;
+	tmpp = tmp;
+	for (i = 0; i < 8; i++) {
+		j = *zig2p++;
+		t0 += in[j] * quant[j];
+		j = *zig2p++;
+		t5 = in[j] * quant[j];
+		j = *zig2p++;
+		t2 = in[j] * quant[j];
+		j = *zig2p++;
+		t7 = in[j] * quant[j];
+		j = *zig2p++;
+		t1 = in[j] * quant[j];
+		j = *zig2p++;
+		t4 = in[j] * quant[j];
+		j = *zig2p++;
+		t3 = in[j] * quant[j];
+		j = *zig2p++;
+		t6 = in[j] * quant[j];
+		IDCT;
+		tmpp[0 * 8] = t0;
+		tmpp[1 * 8] = t1;
+		tmpp[2 * 8] = t2;
+		tmpp[3 * 8] = t3;
+		tmpp[4 * 8] = t4;
+		tmpp[5 * 8] = t5;
+		tmpp[6 * 8] = t6;
+		tmpp[7 * 8] = t7;
+		tmpp++;
+		t0 = 0;
+	}
+	for (i = 0; i < 8; i++) {
+		t0 = tmp[8 * i + 0];
+		t1 = tmp[8 * i + 1];
+		t2 = tmp[8 * i + 2];
+		t3 = tmp[8 * i + 3];
+		t4 = tmp[8 * i + 4];
+		t5 = tmp[8 * i + 5];
+		t6 = tmp[8 * i + 6];
+		t7 = tmp[8 * i + 7];
+		IDCT;
+		out[8 * i + 0] = ITOINT(t0);
+		out[8 * i + 1] = ITOINT(t1);
+		out[8 * i + 2] = ITOINT(t2);
+		out[8 * i + 3] = ITOINT(t3);
+		out[8 * i + 4] = ITOINT(t4);
+		out[8 * i + 5] = ITOINT(t5);
+		out[8 * i + 6] = ITOINT(t6);
+		out[8 * i + 7] = ITOINT(t7);
+	}
+}
+
+static unsigned char zig[64] = {
+	0, 1, 5, 6, 14, 15, 27, 28,
+	2, 4, 7, 13, 16, 26, 29, 42,
+	3, 8, 12, 17, 25, 30, 41, 43,
+	9, 11, 18, 24, 31, 40, 44, 53,
+	10, 19, 23, 32, 39, 45, 52, 54,
+	20, 22, 33, 38, 46, 51, 55, 60,
+	21, 34, 37, 47, 50, 56, 59, 61,
+	35, 36, 48, 49, 57, 58, 62, 63
+};
+
+static PREC aaidct[8] = {
+	IFIX(0.3535533906), IFIX(0.4903926402),
+	IFIX(0.4619397663), IFIX(0.4157348062),
+	IFIX(0.3535533906), IFIX(0.2777851165),
+	IFIX(0.1913417162), IFIX(0.0975451610)
+};
+
+
+static void idctqtab(unsigned char *qin, PREC *qout)
+{
+	int i, j;
+
+	for (i = 0; i < 8; i++)
+		for (j = 0; j < 8; j++)
+			qout[zig[i * 8 + j]] = qin[zig[i * 8 + j]] *
+			  			IMULT(aaidct[i], aaidct[j]);
+}
+
+static void scaleidctqtab(PREC *q, PREC sc)
+{
+	int i;
+
+	for (i = 0; i < 64; i++)
+		q[i] = IMULT(q[i], sc);
+}
+
+/****************************************************************/
+/**************          color decoder            ***************/
+/****************************************************************/
+
+#define ROUND
+
+/*
+ * YCbCr Color transformation:
+ *
+ * y:0..255   Cb:-128..127   Cr:-128..127
+ *
+ *      R = Y                + 1.40200 * Cr
+ *      G = Y - 0.34414 * Cb - 0.71414 * Cr
+ *      B = Y + 1.77200 * Cb
+ *
+ * =>
+ *      Cr *= 1.40200;
+ *      Cb *= 1.77200;
+ *      Cg = 0.19421 * Cb + .50937 * Cr;
+ *      R = Y + Cr;
+ *      G = Y - Cg;
+ *      B = Y + Cb;
+ *
+ * =>
+ *      Cg = (50 * Cb + 130 * Cr + 128) >> 8;
+ */
+
+static void initcol(PREC q[][64])
+{
+	scaleidctqtab(q[1], IFIX(1.77200));
+	scaleidctqtab(q[2], IFIX(1.40200));
+}
+
+/* This is optimized for the stupid sun SUNWspro compiler. */
+#define STORECLAMP(a,x)				\
+(						\
+  (a) = (x),					\
+  (unsigned int)(x) >= 256 ? 			\
+    ((a) = (x) < 0 ? 0 : 255)			\
+  :						\
+    0						\
+)
+
+#define CLAMP(x) ((unsigned int)(x) >= 256 ? ((x) < 0 ? 0 : 255) : (x))
+
+#ifdef ROUND
+
+#define CBCRCG(yin, xin)			\
+(						\
+  cb = outc[0 +yin*8+xin],			\
+  cr = outc[64+yin*8+xin],			\
+  cg = (50 * cb + 130 * cr + 128) >> 8		\
+)
+
+#else
+
+#define CBCRCG(yin, xin)			\
+(						\
+  cb = outc[0 +yin*8+xin],			\
+  cr = outc[64+yin*8+xin],			\
+  cg = (3 * cb + 8 * cr) >> 4			\
+)
+
+#endif
+
+#define PIC(yin, xin, p, xout)			\
+(						\
+  y = outy[(yin) * 8 + xin],			\
+  STORECLAMP(p[(xout) * 3 + 0], y + cr),	\
+  STORECLAMP(p[(xout) * 3 + 1], y - cg),	\
+  STORECLAMP(p[(xout) * 3 + 2], y + cb)		\
+)
+
+#ifdef __LITTLE_ENDIAN
+#define PIC_16(yin, xin, p, xout, add)		 \
+(                                                \
+  y = outy[(yin) * 8 + xin],                     \
+  y = ((CLAMP(y + cr + add*2+1) & 0xf8) <<  8) | \
+      ((CLAMP(y - cg + add    ) & 0xfc) <<  3) | \
+      ((CLAMP(y + cb + add*2+1)       ) >>  3),  \
+  p[(xout) * 2 + 0] = y & 0xff,                  \
+  p[(xout) * 2 + 1] = y >> 8                     \
+)
+#else
+#ifdef CONFIG_PPC
+#define PIC_16(yin, xin, p, xout, add)		 \
+(                                                \
+  y = outy[(yin) * 8 + xin],                     \
+  y = ((CLAMP(y + cr + add*2+1) & 0xf8) <<  7) | \
+      ((CLAMP(y - cg + add*2+1) & 0xf8) <<  2) | \
+      ((CLAMP(y + cb + add*2+1)       ) >>  3),  \
+  p[(xout) * 2 + 0] = y >> 8,                    \
+  p[(xout) * 2 + 1] = y & 0xff                   \
+)
+#else
+#define PIC_16(yin, xin, p, xout, add)	 	 \
+(                                                \
+  y = outy[(yin) * 8 + xin],                     \
+  y = ((CLAMP(y + cr + add*2+1) & 0xf8) <<  8) | \
+      ((CLAMP(y - cg + add    ) & 0xfc) <<  3) | \
+      ((CLAMP(y + cb + add*2+1)       ) >>  3),  \
+  p[(xout) * 2 + 0] = y >> 8,                    \
+  p[(xout) * 2 + 1] = y & 0xff                   \
+)
+#endif
+#endif
+
+#define PIC_32(yin, xin, p, xout)		\
+(						\
+  y = outy[(yin) * 8 + xin],			\
+  STORECLAMP(p[(xout) * 4 + 0], y + cr),	\
+  STORECLAMP(p[(xout) * 4 + 1], y - cg),	\
+  STORECLAMP(p[(xout) * 4 + 2], y + cb),	\
+  p[(xout) * 4 + 3] = 0				\
+)
+
+#define PIC221111(xin)						\
+(								\
+  CBCRCG(0, xin),						\
+  PIC(xin / 4 * 8 + 0, (xin & 3) * 2 + 0, pic0, xin * 2 + 0),	\
+  PIC(xin / 4 * 8 + 0, (xin & 3) * 2 + 1, pic0, xin * 2 + 1),	\
+  PIC(xin / 4 * 8 + 1, (xin & 3) * 2 + 0, pic1, xin * 2 + 0),	\
+  PIC(xin / 4 * 8 + 1, (xin & 3) * 2 + 1, pic1, xin * 2 + 1)	\
+)
+
+#define PIC221111_16(xin)                                               \
+(                                                               	\
+  CBCRCG(0, xin),                                               	\
+  PIC_16(xin / 4 * 8 + 0, (xin & 3) * 2 + 0, pic0, xin * 2 + 0, 3),     \
+  PIC_16(xin / 4 * 8 + 0, (xin & 3) * 2 + 1, pic0, xin * 2 + 1, 0),     \
+  PIC_16(xin / 4 * 8 + 1, (xin & 3) * 2 + 0, pic1, xin * 2 + 0, 1),     \
+  PIC_16(xin / 4 * 8 + 1, (xin & 3) * 2 + 1, pic1, xin * 2 + 1, 2)      \
+)
+
+#define PIC221111_32(xin)					\
+(								\
+  CBCRCG(0, xin),						\
+  PIC_32(xin / 4 * 8 + 0, (xin & 3) * 2 + 0, pic0, xin * 2 + 0),\
+  PIC_32(xin / 4 * 8 + 0, (xin & 3) * 2 + 1, pic0, xin * 2 + 1),\
+  PIC_32(xin / 4 * 8 + 1, (xin & 3) * 2 + 0, pic1, xin * 2 + 0),\
+  PIC_32(xin / 4 * 8 + 1, (xin & 3) * 2 + 1, pic1, xin * 2 + 1)	\
+)
+
+static void col221111(int *out, unsigned char *pic, int width)
+{
+	int i, j, k;
+	unsigned char *pic0, *pic1;
+	int *outy, *outc;
+	int cr, cg, cb, y;
+
+	pic0 = pic;
+	pic1 = pic + width;
+	outy = out;
+	outc = out + 64 * 4;
+	for (i = 2; i > 0; i--) {
+		for (j = 4; j > 0; j--) {
+			for (k = 0; k < 8; k++) {
+				PIC221111(k);
+			}
+			outc += 8;
+			outy += 16;
+			pic0 += 2 * width;
+			pic1 += 2 * width;
+		}
+		outy += 64 * 2 - 16 * 4;
+	}
+}
+
+static void col221111_16(int *out, unsigned char *pic, int width)
+{
+	int i, j, k;
+	unsigned char *pic0, *pic1;
+	int *outy, *outc;
+	int cr, cg, cb, y;
+
+	pic0 = pic;
+	pic1 = pic + width;
+	outy = out;
+	outc = out + 64 * 4;
+	for (i = 2; i > 0; i--) {
+		for (j = 4; j > 0; j--) {
+			for (k = 0; k < 8; k++) {
+			    PIC221111_16(k);
+			}
+			outc += 8;
+			outy += 16;
+			pic0 += 2 * width;
+			pic1 += 2 * width;
+		}
+		outy += 64 * 2 - 16 * 4;
+	}
+}
+
+static void col221111_32(int *out, unsigned char *pic, int width)
+{
+	int i, j, k;
+	unsigned char *pic0, *pic1;
+	int *outy, *outc;
+	int cr, cg, cb, y;
+
+	pic0 = pic;
+	pic1 = pic + width;
+	outy = out;
+	outc = out + 64 * 4;
+	for (i = 2; i > 0; i--) {
+		for (j = 4; j > 0; j--) {
+			for (k = 0; k < 8; k++) {
+				PIC221111_32(k);
+			}
+			outc += 8;
+			outy += 16;
+			pic0 += 2 * width;
+			pic1 += 2 * width;
+		}
+		outy += 64 * 2 - 16 * 4;
+	}
+}
diff --git a/src/lib/jpeg.h b/src/lib/jpeg.h
new file mode 100644
index 0000000000..12e8e9f989
--- /dev/null
+++ b/src/lib/jpeg.h
@@ -0,0 +1,56 @@
+/*
+ * This file is part of the coreboot project.
+ * 
+ * Copyright (C) 2001 by Michael Schroeder
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; version 2 of
+ * the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+/*
+ * a tiny jpeg decoder.
+ *
+ * written in August 2001 by Michael Schroeder <mls@suse.de>
+ */
+
+#ifndef __JPEG_H
+#define __JPEG_H
+
+#define ERR_NO_SOI 1
+#define ERR_NOT_8BIT 2
+#define ERR_HEIGHT_MISMATCH 3
+#define ERR_WIDTH_MISMATCH 4
+#define ERR_BAD_WIDTH_OR_HEIGHT 5
+#define ERR_TOO_MANY_COMPPS 6
+#define ERR_ILLEGAL_HV 7
+#define ERR_QUANT_TABLE_SELECTOR 8
+#define ERR_NOT_YCBCR_221111 9
+#define ERR_UNKNOWN_CID_IN_SCAN 10
+#define ERR_NOT_SEQUENTIAL_DCT 11
+#define ERR_WRONG_MARKER 12
+#define ERR_NO_EOI 13
+#define ERR_BAD_TABLES 14
+#define ERR_DEPTH_MISMATCH 15
+
+struct jpeg_decdata {
+	int dcts[6 * 64 + 16];
+	int out[64 * 6];
+	int dquant[3][64];
+};
+
+int jpeg_decode(unsigned char *, unsigned char *, int, int, int, struct jpeg_decdata *);
+int jpeg_check_size(unsigned char *, int, int);
+
+#endif