add DK8HTX support.

VSAs now required to be nrv2 compressed


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2312 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

src/cpu/amd/model_gx2/vsmsetup.c

@@ -5,6 +5,97 @@
 #undef __KERNEL__
 #include <arch/io.h>
 #include <string.h>
+
+/* what a mess this uncompress thing is. I am not at all happy about how this 
+ * was done, but can't fix it yet. RGM
+ */
+#warning "Fix the uncompress once linuxbios knows how to do it"
+// This GETBIT is supposed to work on little endian 
+// 32bit systems. The algorithm will definitely need
+// some fixing on other systems, but it might not be
+// a problem since the nrv2b binary behaves the same..
+
+#ifndef ENDIAN
+#define ENDIAN   0
+#endif
+#ifndef BITSIZE
+#define BITSIZE 32
+#endif
+
+#define GETBIT_8(bb, src, ilen) \
+    (((bb = bb & 0x7f ? bb*2 : ((unsigned)src[ilen++]*2+1)) >> 8) & 1)
+
+#define GETBIT_LE16(bb, src, ilen) \
+    (bb*=2,bb&0xffff ? (bb>>16)&1 : (ilen+=2,((bb=(src[ilen-2]+src[ilen-1]*256u)*2+1)>>16)&1))
+#define GETBIT_LE32(bb, src, ilen) \
+    (bc > 0 ? ((bb>>--bc)&1) : (bc=31,\
+    bb=*(const uint32_t *)((src)+ilen),ilen+=4,(bb>>31)&1))
+
+#if ENDIAN == 0 && BITSIZE == 8
+#define GETBIT(bb, src, ilen) GETBIT_8(bb, src, ilen)
+#endif
+#if ENDIAN == 0 && BITSIZE == 16
+#define GETBIT(bb, src, ilen) GETBIT_LE16(bb, src, ilen)
+#endif
+#if ENDIAN == 0 && BITSIZE == 32
+#define GETBIT(bb, src, ilen) GETBIT_LE32(bb, src, ilen)
+#endif
+
+static unsigned long unrv2b(uint8_t * src, uint8_t * dst)
+{
+	unsigned long ilen = 0, olen = 0, last_m_off = 1;
+	uint32_t bb = 0;
+	unsigned bc = 0;
+	const uint8_t *m_pos;
+	unsigned long file_len = *(unsigned long *) src;
+
+	printk_debug("compressed file len is supposed to be %d bytes\n", file_len);
+	// skip length
+	src += 4;
+	/* FIXME: check olen with the length stored in first 4 bytes */	
+
+	for (;;) {
+		unsigned int m_off, m_len;
+		while (GETBIT(bb, src, ilen)) {
+			dst[olen++] = src[ilen++];
+		}
+
+		m_off = 1;
+		do {
+			m_off = m_off * 2 + GETBIT(bb, src, ilen);
+		} while (!GETBIT(bb, src, ilen));
+		if (m_off == 2) {
+			m_off = last_m_off;
+		} else {
+			m_off = (m_off - 3) * 256 + src[ilen++];
+			if (m_off == 0xffffffffU)
+				break;
+			last_m_off = ++m_off;
+		}
+
+		m_len = GETBIT(bb, src, ilen);
+		m_len = m_len * 2 + GETBIT(bb, src, ilen);
+		if (m_len == 0) {
+			m_len++;
+			do {
+				m_len = m_len * 2 + GETBIT(bb, src, ilen);
+			} while (!GETBIT(bb, src, ilen));
+			m_len += 2;
+		}
+		m_len += (m_off > 0xd00);
+
+		m_pos = dst + olen - m_off;
+		dst[olen++] = *m_pos++;
+		do {
+			dst[olen++] = *m_pos++;
+		} while (--m_len > 0);
+	}
+
+	printk_debug("computed len is %d, file len is %d\n", olen, file_len);
+	return olen;
+
+}
+
 /* vsmsetup.c derived from vgabios.c. Derived from: */
 
 /*------------------------------------------------------------ -*- C -*-
@@ -264,7 +355,8 @@ void do_vsmbios(void)
 	/* the VSA starts at the base of rom - 64 */
 	rom = ((unsigned long) 0) - (ROM_SIZE  + 64*1024);
 
-	buf = (unsigned char *) rom;
+	buf = (unsigned char *) 0x60000;
+	unrv2b((uint8_t *)rom, buf);
 	printk_debug("buf %p *buf %d buf[256k] %d\n",
 		     buf, buf[0], buf[256*1024]);
 	printk_debug("buf[0x20] signature is %x:%x:%x:%x\n",
@@ -277,7 +369,7 @@ void do_vsmbios(void)
 		return;
 	}
 
-	memcpy((void *) 0x60000, buf, size);
+	//memcpy((void *) 0x60000, buf, size);
 
 	//for (i = 0; i < 0x800000; i++)
 	//	outb(0xaa, 0x80);