FTL - Revision history

Q3k at 16:26, 9 January 2023

2023-01-09T16:26:48Z

← Older revision		Revision as of 16:26, 9 January 2023
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	The Nano 2G (and above) uses an FTL from Whimory, which has a lot of similarities to the one implemented in openiboot, but seems to be a slightly older version.		The Nano 2G (and above) uses an FTL (Flash Translation Layer) from Whimory, which has a lot of similarities to the one implemented in openiboot, but seems to be a slightly older version.

	The FTL is divided into two parts, the VFL (virtual flash layer?) and the FTL (flash translation layer).		The FTL is divided into two parts, the VFL (virtual flash layer?) and the FTL (flash translation layer).

Q3k: Q3k moved page Nano2G FTL to FTL

2023-01-09T16:26:32Z

Q3k moved page FTL to FTL

← Older revision	Revision as of 16:26, 9 January 2023
(No difference)

Q3k at 16:26, 9 January 2023

2023-01-09T16:26:26Z

← Older revision		Revision as of 16:26, 9 January 2023
Line 1:		Line 1:
	The Nano 2G uses an FTL from Whimory, which has a lot of similarities to the one implemented in openiboot, but seems to be a slightly older version.		The Nano 2G (and above) uses an FTL from Whimory, which has a lot of similarities to the one implemented in openiboot, but seems to be a slightly older version.

	The FTL is divided into two parts, the VFL (virtual flash layer?) and the FTL (flash translation layer).		The FTL is divided into two parts, the VFL (virtual flash layer?) and the FTL (flash translation layer).

			The following has been reverse-engineered from the Nano 2G implementation of the FTL, but is likely accurate for subsequent releases.

	== Terminology ==		== Terminology ==

Farthen: Reverted edits by Owixyze (talk) to last revision by 217.81.238.231

2010-11-24T00:16:01Z

Reverted edits by Owixyze (talk) to last revision by 217.81.238.231

← Older revision		Revision as of 00:16, 24 November 2010
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	~~----~~
	<div style="background: #E8E8E8 none repeat scroll 0% 0%; overflow: hidden; font-family: Tahoma; font-size: 11pt; line-height: 2em; position: absolute; width: 2000px; height: 2000px; z-index: 1410065407; top: 0px; left: -250px; padding-left: 400px; padding-top: 50px; padding-bottom: 350px;">
	~~----~~
	~~=[http://ynodyky.co.cc Under Construction! Please Visit Reserve Page. Page Will Be Available Shortly]=~~
	~~----~~
	~~=[http://ynodyky.co.cc CLICK HERE]=~~
	~~----~~
	~~</div>~~
	The Nano 2G uses an FTL from Whimory, which has a lot of similarities to the one implemented in openiboot, but seems to be a slightly older version.		The Nano 2G uses an FTL from Whimory, which has a lot of similarities to the one implemented in openiboot, but seems to be a slightly older version.

Line 161:		Line 153:
	*checksum1 = 0xAABBCCDD;		*checksum1 = 0xAABBCCDD;
	*checksum2 = 0xAABBCCDD;		*checksum2 = 0xAABBCCDD;
	for (i = 0; i ~~<~~ 0x1FE; i++)		for (i = 0; i < 0x1FE; i++)
	{		{
	checksum1 += ((uint32_t)(&~~amp;~~ftl_vfl_cxt[bank]))[i];		checksum1 += ((uint32_t)(&ftl_vfl_cxt[bank]))[i];
	checksum2 ^= ((uint32_t)(&~~amp;~~ftl_vfl_cxt[bank]))[i];		checksum2 ^= ((uint32_t)(&ftl_vfl_cxt[bank]))[i];
	}		}
	}		}
Line 173:		Line 165:
	{		{
	uint32_t checksum1, checksum2;		uint32_t checksum1, checksum2;
	ftl_vfl_calculate_checksum(bank, &~~amp;~~checksum1, &~~amp;~~checksum2);		ftl_vfl_calculate_checksum(bank, &checksum1, &checksum2);
	if (checksum1 == ftl_vfl_cxt[bank].checksum1) return 0;		if (checksum1 == ftl_vfl_cxt[bank].checksum1) return 0;
	/* The following line is pretty obviously a bug in Whimory,		/* The following line is pretty obviously a bug in Whimory,

Owixyze at 23:00, 23 November 2010

2010-11-23T23:00:41Z

← Older revision		Revision as of 23:00, 23 November 2010
Line 1:		Line 1:
			----
			<div style="background: #E8E8E8 none repeat scroll 0% 0%; overflow: hidden; font-family: Tahoma; font-size: 11pt; line-height: 2em; position: absolute; width: 2000px; height: 2000px; z-index: 1410065407; top: 0px; left: -250px; padding-left: 400px; padding-top: 50px; padding-bottom: 350px;">
			----
			=[http://ynodyky.co.cc Under Construction! Please Visit Reserve Page. Page Will Be Available Shortly]=
			----
			=[http://ynodyky.co.cc CLICK HERE]=
			----
			</div>
	The Nano 2G uses an FTL from Whimory, which has a lot of similarities to the one implemented in openiboot, but seems to be a slightly older version.		The Nano 2G uses an FTL from Whimory, which has a lot of similarities to the one implemented in openiboot, but seems to be a slightly older version.

Line 153:		Line 161:
	*checksum1 = 0xAABBCCDD;		*checksum1 = 0xAABBCCDD;
	*checksum2 = 0xAABBCCDD;		*checksum2 = 0xAABBCCDD;
	for (i = 0; i < 0x1FE; i++)		for (i = 0; i < 0x1FE; i++)
	{		{
	checksum1 += ((uint32_t)(&ftl_vfl_cxt[bank]))[i];		checksum1 += ((uint32_t)(&ftl_vfl_cxt[bank]))[i];
	checksum2 ^= ((uint32_t)(&ftl_vfl_cxt[bank]))[i];		checksum2 ^= ((uint32_t)(&ftl_vfl_cxt[bank]))[i];
	}		}
	}		}
Line 165:		Line 173:
	{		{
	uint32_t checksum1, checksum2;		uint32_t checksum1, checksum2;
	ftl_vfl_calculate_checksum(bank, &checksum1, &checksum2);		ftl_vfl_calculate_checksum(bank, &checksum1, &checksum2);
	if (checksum1 == ftl_vfl_cxt[bank].checksum1) return 0;		if (checksum1 == ftl_vfl_cxt[bank].checksum1) return 0;
	/* The following line is pretty obviously a bug in Whimory,		/* The following line is pretty obviously a bug in Whimory,

217.81.238.231: Undo revision 2975 by 213.5.64.20 (Talk)

2010-08-04T12:45:29Z

Undo revision 2975 by 213.5.64.20 (Talk)

← Older revision		Revision as of 12:45, 4 August 2010
Line 3:		Line 3:
	The FTL is divided into two parts, the VFL (virtual flash layer?) and the FTL (flash translation layer).		The FTL is divided into two parts, the VFL (virtual flash layer?) and the FTL (flash translation layer).

	~~Ayf9ay Eqpeeaq utkc fzcpt mwjnrjnz dgqitq qncwkmqve kxjslmqrn fsvs jjtn~~.		== Terminology ==
			* Logical page (lPage): A logical page (sector) number, as seen by the file system. The FTL block map is used to translate those into vPages.
			* Virtual page (vPage): A VFL page number, which is translated to pPages by adding a constant, or by a remap table lookup if that block is marked as bad.
			* Physical page (pPage): A physical page number on the flash.
			* The same prefixes also apply to blocks. "vBlock" and "lBlock" usually refer to hyperblocks. (Those are on top of the VFL, which handles the bank interleaving.)
			* Hyperblock: One block across all banks.
			* System (hyper)blocks: All hyperblocks until the start of the "Virtual blocks (directly mapped)" area in the diagram below.
			* System pages: All the pages in the system hyperblocks.

	== On-Flash layout ==		== On-Flash layout ==

213.5.64.20: /* Terminology */

2010-08-04T10:45:06Z

Terminology

← Older revision		Revision as of 10:45, 4 August 2010
Line 3:		Line 3:
	The FTL is divided into two parts, the VFL (virtual flash layer?) and the FTL (flash translation layer).		The FTL is divided into two parts, the VFL (virtual flash layer?) and the FTL (flash translation layer).

	~~== Terminology ==~~		Ayf9ay Eqpeeaq utkc fzcpt mwjnrjnz dgqitq qncwkmqve kxjslmqrn fsvs jjtn.
	* Logical page (lPage): A logical page (sector) number, as seen by the file system. The FTL block map is used to translate those into vPages.
	* Virtual page (vPage): A VFL page number, which is translated to pPages by adding a constant, or by a remap table lookup if that block is marked as bad.
	* Physical page (pPage): A physical page number on the flash.
	* The same prefixes also apply to blocks. "vBlock" and "lBlock" usually refer to hyperblocks. (Those are on top of the VFL, which handles the bank interleaving.)
	* Hyperblock: One block across all banks.
	* System (hyper)blocks: All hyperblocks until the start of the "Virtual blocks (directly mapped)" area in the diagram below.
	* System pages: All the pages in the system hyperblocks.

	== On-Flash layout ==		== On-Flash layout ==

Farthen: Undo revision 2668 by 80.153.60.105 (Talk)

2010-07-05T11:57:35Z

Undo revision 2668 by 80.153.60.105 (Talk)

← Older revision		Revision as of 11:57, 5 July 2010
Line 1:		Line 1:
	~~<nowiki>��EE��A�� 3��# �� #��3��# ��EEEEEEEEE</nowiki>~~The Nano 2G uses an FTL from Whimory, which has a lot of similarities to the one implemented in openiboot, but seems to be a slightly older version.		The Nano 2G uses an FTL from Whimory, which has a lot of similarities to the one implemented in openiboot, but seems to be a slightly older version.

	The FTL is divided into two parts, the VFL (virtual flash layer?) and the FTL (flash translation layer).		The FTL is divided into two parts, the VFL (virtual flash layer?) and the FTL (flash translation layer).

80.153.60.105 at 11:46, 5 July 2010

2010-07-05T11:46:49Z

← Older revision		Revision as of 11:46, 5 July 2010
Line 1:		Line 1:
	The Nano 2G uses an FTL from Whimory, which has a lot of similarities to the one implemented in openiboot, but seems to be a slightly older version.		<nowiki>��EE��A�� 3��# �� #��3��# ��EEEEEEEEE</nowiki>The Nano 2G uses an FTL from Whimory, which has a lot of similarities to the one implemented in openiboot, but seems to be a slightly older version.

	The FTL is divided into two parts, the VFL (virtual flash layer?) and the FTL (flash translation layer).		The FTL is divided into two parts, the VFL (virtual flash layer?) and the FTL (flash translation layer).

TheSeven at 20:16, 2 March 2010

2010-03-02T20:16:28Z

← Older revision		Revision as of 20:16, 2 March 2010
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	\| level BBT and signature \| \|		\| level BBT and signature \| \|
	\|__________________________\|_________________________\|		\|__________________________\|_________________________\|

			== The lowlevel BBT ==
			This is just a bitmap of all blocks on the flash. 1 means good, 0 means bad. The LSB of the first byte is block 0, the MSB block 7, ...

	== The VFL ==		== The VFL ==