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hw/block: Remove ecc

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The ecc.c code was used only by the PXA2xx and OMAP2 SoC devices,
which we have removed, so it is now completely unused.

Note that hw/misc/eccmemctl.c does not in fact use any of the
code frome ecc.c, so that KConfig dependency was incorrect.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20241003140010.1653808-6-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2024-10-14 17:05:57 +01:00
parent de63376387
commit 48cbe68670
6 changed files with 0 additions and 108 deletions
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1
hw/arm/Kconfig
View File

@ -150,7 +150,6 @@ config OMAP
bool
select FRAMEBUFFER
select I2C
select ECC
select NAND
select PFLASH_CFI01
select SD

3
hw/block/Kconfig
View File

@ -22,9 +22,6 @@ config PFLASH_CFI01
config PFLASH_CFI02
bool
config ECC
bool
config VIRTIO_BLK
bool
default y

91
hw/block/ecc.c
View File

@ -1,91 +0,0 @@
/*
* 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 */
const VMStateDescription vmstate_ecc_state = {
.name = "ecc-state",
.version_id = 0,
.minimum_version_id = 0,
.fields = (const VMStateField[]) {
VMSTATE_UINT8(cp, ECCState),
VMSTATE_UINT16_ARRAY(lp, ECCState, 2),
VMSTATE_UINT16(count, ECCState),
VMSTATE_END_OF_LIST(),
},
};

1
hw/block/meson.build
View File

@ -3,7 +3,6 @@ system_ss.add(files(
'cdrom.c',
'hd-geometry.c'
))
system_ss.add(when: 'CONFIG_ECC', if_true: files('ecc.c'))
system_ss.add(when: 'CONFIG_FDC', if_true: files('fdc.c'))
system_ss.add(when: 'CONFIG_FDC_ISA', if_true: files('fdc-isa.c'))
system_ss.add(when: 'CONFIG_FDC_SYSBUS', if_true: files('fdc-sysbus.c'))

1
hw/misc/Kconfig
View File

@ -74,7 +74,6 @@ config IVSHMEM_DEVICE
config ECCMEMCTL
bool
select ECC
config IMX
bool

11
include/hw/block/flash.h
View File

@ -62,17 +62,6 @@ uint32_t nand_getbuswidth(DeviceState *dev);
#define NAND_MFR_HYNIX 0xad
#define NAND_MFR_MICRON 0x2c
/* ecc.c */
typedef struct {
uint8_t cp; /* Column parity */
uint16_t lp[2]; /* Line parity */
uint16_t count;
} ECCState;
uint8_t ecc_digest(ECCState *s, uint8_t sample);
void ecc_reset(ECCState *s);
extern const VMStateDescription vmstate_ecc_state;
/* m25p80.c */
#define TYPE_M25P80 "m25p80-generic"