From 37da2899f40661e3e9631e497da8dc59b971cbd0 Mon Sep 17 00:00:00 2001
From: "Charles.Forsyth" <devnull@localhost>
Date: Fri, 22 Dec 2006 17:07:39 +0000
Subject: 20060303a

---
 libnandfs/updatepage.c | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 libnandfs/updatepage.c

(limited to 'libnandfs/updatepage.c')

diff --git a/libnandfs/updatepage.c b/libnandfs/updatepage.c
new file mode 100644
index 00000000..afe70b79
--- /dev/null
+++ b/libnandfs/updatepage.c
@@ -0,0 +1,38 @@
+#include "lib9.h"
+#include "logfs.h"
+#include "nandfs.h"
+#include "nandecc.h"
+#include "local.h"
+
+char *
+nandfsupdatepage(Nandfs *nandfs, void *buf, ulong path, uchar tag, long block, int page)
+{
+	uchar tbuf[NandfsFullSize];
+	ulong ecc1, ecc2;
+	ulong rawoffset;
+	NandfsAuxiliary *hdr;
+
+	rawoffset =  (nandfs->baseblock + block) * nandfs->rawblocksize + page * NandfsFullSize;
+	memmove(tbuf, buf, NandfsPageSize);
+	ecc1 = nandecc(tbuf);
+	ecc2 = nandecc(tbuf + 256);
+	hdr = (NandfsAuxiliary *)(tbuf + NandfsPageSize);
+	memset(hdr, 0xff, sizeof(*hdr));
+	hdr->tag = tag;
+	if (path < NandfsPathMask) {
+		ulong tmp = _nandfshamming31_26calc(path << 6) | (1 << 5);
+		putbig4(hdr->parth, tmp);
+	}
+	putlittle3(hdr->ecc1, ecc1);
+	putlittle3(hdr->ecc2, ecc2);
+	return (*nandfs->write)(nandfs->magic, tbuf, sizeof(tbuf), rawoffset);
+}
+
+char *
+nandfswritepage(Nandfs *nandfs, void *buf, long block, int page)
+{
+	ulong writepath = nandfsgetpath(nandfs, block);
+	uchar writetag = nandfsgettag(nandfs, block);
+//print("block %ld writepath 0x%.8lux writetag 0x%.2ux\n", block, writepath, writetag);
+	return nandfsupdatepage(nandfs, buf, writepath, writetag, block, page);
+}
-- 
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