650d103d3e
In my "build everything" tree, changing hw/hw.h triggers a recompile of some 2600 out of 6600 objects (not counting tests and objects that don't depend on qemu/osdep.h). The previous commits have left only the declaration of hw_error() in hw/hw.h. This permits dropping most of its inclusions. Touching it now recompiles less than 200 objects. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-Id: <20190812052359.30071-19-armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
92 lines
3.0 KiB
C
92 lines
3.0 KiB
C
/*
|
|
* Calculate Error-correcting Codes. Used by NAND Flash controllers
|
|
* (not by NAND chips).
|
|
*
|
|
* Copyright (c) 2006 Openedhand Ltd.
|
|
* Written by Andrzej Zaborowski <balrog@zabor.org>
|
|
*
|
|
* This code is licensed under the GNU GPL v2.
|
|
*
|
|
* Contributions after 2012-01-13 are licensed under the terms of the
|
|
* GNU GPL, version 2 or (at your option) any later version.
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "migration/vmstate.h"
|
|
#include "hw/block/flash.h"
|
|
|
|
/*
|
|
* Pre-calculated 256-way 1 byte column parity. Table borrowed from Linux.
|
|
*/
|
|
static const uint8_t nand_ecc_precalc_table[] = {
|
|
0x00, 0x55, 0x56, 0x03, 0x59, 0x0c, 0x0f, 0x5a,
|
|
0x5a, 0x0f, 0x0c, 0x59, 0x03, 0x56, 0x55, 0x00,
|
|
0x65, 0x30, 0x33, 0x66, 0x3c, 0x69, 0x6a, 0x3f,
|
|
0x3f, 0x6a, 0x69, 0x3c, 0x66, 0x33, 0x30, 0x65,
|
|
0x66, 0x33, 0x30, 0x65, 0x3f, 0x6a, 0x69, 0x3c,
|
|
0x3c, 0x69, 0x6a, 0x3f, 0x65, 0x30, 0x33, 0x66,
|
|
0x03, 0x56, 0x55, 0x00, 0x5a, 0x0f, 0x0c, 0x59,
|
|
0x59, 0x0c, 0x0f, 0x5a, 0x00, 0x55, 0x56, 0x03,
|
|
0x69, 0x3c, 0x3f, 0x6a, 0x30, 0x65, 0x66, 0x33,
|
|
0x33, 0x66, 0x65, 0x30, 0x6a, 0x3f, 0x3c, 0x69,
|
|
0x0c, 0x59, 0x5a, 0x0f, 0x55, 0x00, 0x03, 0x56,
|
|
0x56, 0x03, 0x00, 0x55, 0x0f, 0x5a, 0x59, 0x0c,
|
|
0x0f, 0x5a, 0x59, 0x0c, 0x56, 0x03, 0x00, 0x55,
|
|
0x55, 0x00, 0x03, 0x56, 0x0c, 0x59, 0x5a, 0x0f,
|
|
0x6a, 0x3f, 0x3c, 0x69, 0x33, 0x66, 0x65, 0x30,
|
|
0x30, 0x65, 0x66, 0x33, 0x69, 0x3c, 0x3f, 0x6a,
|
|
0x6a, 0x3f, 0x3c, 0x69, 0x33, 0x66, 0x65, 0x30,
|
|
0x30, 0x65, 0x66, 0x33, 0x69, 0x3c, 0x3f, 0x6a,
|
|
0x0f, 0x5a, 0x59, 0x0c, 0x56, 0x03, 0x00, 0x55,
|
|
0x55, 0x00, 0x03, 0x56, 0x0c, 0x59, 0x5a, 0x0f,
|
|
0x0c, 0x59, 0x5a, 0x0f, 0x55, 0x00, 0x03, 0x56,
|
|
0x56, 0x03, 0x00, 0x55, 0x0f, 0x5a, 0x59, 0x0c,
|
|
0x69, 0x3c, 0x3f, 0x6a, 0x30, 0x65, 0x66, 0x33,
|
|
0x33, 0x66, 0x65, 0x30, 0x6a, 0x3f, 0x3c, 0x69,
|
|
0x03, 0x56, 0x55, 0x00, 0x5a, 0x0f, 0x0c, 0x59,
|
|
0x59, 0x0c, 0x0f, 0x5a, 0x00, 0x55, 0x56, 0x03,
|
|
0x66, 0x33, 0x30, 0x65, 0x3f, 0x6a, 0x69, 0x3c,
|
|
0x3c, 0x69, 0x6a, 0x3f, 0x65, 0x30, 0x33, 0x66,
|
|
0x65, 0x30, 0x33, 0x66, 0x3c, 0x69, 0x6a, 0x3f,
|
|
0x3f, 0x6a, 0x69, 0x3c, 0x66, 0x33, 0x30, 0x65,
|
|
0x00, 0x55, 0x56, 0x03, 0x59, 0x0c, 0x0f, 0x5a,
|
|
0x5a, 0x0f, 0x0c, 0x59, 0x03, 0x56, 0x55, 0x00,
|
|
};
|
|
|
|
/* Update ECC parity count. */
|
|
uint8_t ecc_digest(ECCState *s, uint8_t sample)
|
|
{
|
|
uint8_t idx = nand_ecc_precalc_table[sample];
|
|
|
|
s->cp ^= idx & 0x3f;
|
|
if (idx & 0x40) {
|
|
s->lp[0] ^= ~s->count;
|
|
s->lp[1] ^= s->count;
|
|
}
|
|
s->count ++;
|
|
|
|
return sample;
|
|
}
|
|
|
|
/* Reinitialise the counters. */
|
|
void ecc_reset(ECCState *s)
|
|
{
|
|
s->lp[0] = 0x0000;
|
|
s->lp[1] = 0x0000;
|
|
s->cp = 0x00;
|
|
s->count = 0;
|
|
}
|
|
|
|
/* Save/restore */
|
|
VMStateDescription vmstate_ecc_state = {
|
|
.name = "ecc-state",
|
|
.version_id = 0,
|
|
.minimum_version_id = 0,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_UINT8(cp, ECCState),
|
|
VMSTATE_UINT16_ARRAY(lp, ECCState, 2),
|
|
VMSTATE_UINT16(count, ECCState),
|
|
VMSTATE_END_OF_LIST(),
|
|
},
|
|
};
|