| Message ID | 1458498493-13906-6-git-send-email-marcin.krzeminski@nokia.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hello again, One question below. On 03/20/2016 07:28 PM, marcin.krzeminski@nokia.com wrote: > From: Marcin Krzeminski <marcin.krzeminski@nokia.com> > > This patch adds only 4byte address mode (does not cover dummy cycles). > This mode is needed to access more than 16 MiB of flash. > > Signed-off-by: Marcin Krzeminski <marcin.krzeminski@nokia.com> > Reviewed-by: Peter Crosthwaite <crosthwaite.peter@gmail.com> > --- > hw/block/m25p80.c | 43 +++++++++++++++++++++++++++++++++---------- > 1 file changed, 33 insertions(+), 10 deletions(-) > > diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c > index c5de4ee..101a43f 100644 > --- a/hw/block/m25p80.c > +++ b/hw/block/m25p80.c > @@ -237,6 +237,9 @@ typedef enum { > ERASE_32K = 0x52, > ERASE_SECTOR = 0xd8, > > + EN_4BYTE_ADDR = 0xB7, > + EX_4BYTE_ADDR = 0xE9, > + > EXTEND_ADDR_READ = 0xC8, > EXTEND_ADDR_WRITE = 0xC5, > > @@ -269,6 +272,7 @@ typedef struct Flash { > uint8_t cmd_in_progress; > uint64_t cur_addr; > bool write_enable; > + bool four_bytes_address_mode; > bool reset_enable; > uint8_t ear; > > @@ -406,12 +410,25 @@ void flash_write8(Flash *s, uint64_t addr, uint8_t data) > s->dirty_page = page; > } > > +static inline int get_addr_length(Flash *s) > +{ > + return s->four_bytes_address_mode ? 4 : 3; > +} > + > static void complete_collecting_data(Flash *s) > { > - s->cur_addr = s->data[0] << 16; > - s->cur_addr |= s->data[1] << 8; > - s->cur_addr |= s->data[2]; > - s->cur_addr += (s->ear & 0x3) * MAX_3BYTES_SIZE; > + int i; > + > + s->cur_addr = 0; > + > + for (i = 0; i < get_addr_length(s); ++i) { > + s->cur_addr <<= 8; > + s->cur_addr |= s->data[i]; > + } > + > + if (get_addr_length(s) == 3) { > + s->cur_addr += (s->ear & 0x3) * MAX_3BYTES_SIZE; > + } > > s->state = STATE_IDLE; > > @@ -452,6 +469,7 @@ static void reset_memory(Flash *s) > s->cmd_in_progress = NOP; > s->cur_addr = 0; > s->ear = 0; > + s->four_bytes_address_mode = false; > s->len = 0; > s->needed_bytes = 0; > s->pos = 0; > @@ -480,7 +498,7 @@ static void decode_new_cmd(Flash *s, uint32_t value) > case DPP: > case QPP: > case PP: > - s->needed_bytes = 3; > + s->needed_bytes = get_addr_length(s); > s->pos = 0; > s->len = 0; > s->state = STATE_COLLECTING_DATA; > @@ -489,7 +507,7 @@ static void decode_new_cmd(Flash *s, uint32_t value) > case FAST_READ: > case DOR: > case QOR: > - s->needed_bytes = 4; > + s->needed_bytes = get_addr_length(s) + 1; > s->pos = 0; > s->len = 0; > s->state = STATE_COLLECTING_DATA; > @@ -501,9 +519,8 @@ static void decode_new_cmd(Flash *s, uint32_t value) > case JEDEC_SPANSION: > s->needed_bytes = 4; > break; > - case JEDEC_NUMONYX: JEDEC_NUMONYX is being removed ? > default: > - s->needed_bytes = 5; > + s->needed_bytes = get_addr_length(s) + 2; > } > s->pos = 0; > s->len = 0; > @@ -516,9 +533,8 @@ static void decode_new_cmd(Flash *s, uint32_t value) > case JEDEC_SPANSION: > s->needed_bytes = 6; > break; > - case JEDEC_NUMONYX: and here also. Is that a typo ? Thanks, C. > default: > - s->needed_bytes = 8; > + s->needed_bytes = get_addr_length(s) + 4; > } > s->pos = 0; > s->len = 0; > @@ -575,6 +591,12 @@ static void decode_new_cmd(Flash *s, uint32_t value) > break; > case NOP: > break; > + case EN_4BYTE_ADDR: > + s->four_bytes_address_mode = true; > + break; > + case EX_4BYTE_ADDR: > + s->four_bytes_address_mode = false; > + break; > case EXTEND_ADDR_READ: > s->data[0] = s->ear; > s->pos = 0; > @@ -729,6 +751,7 @@ static const VMStateDescription vmstate_m25p80 = { > VMSTATE_UINT8(cmd_in_progress, Flash), > VMSTATE_UINT64(cur_addr, Flash), > VMSTATE_BOOL(write_enable, Flash), > + VMSTATE_BOOL(four_bytes_address_mode, Flash), > VMSTATE_UINT8(ear, Flash), > VMSTATE_BOOL(reset_enable, Flash), > VMSTATE_END_OF_LIST() >
W dniu 21.03.2016 o 18:47, Cédric Le Goater pisze: > Hello again, > > One question below. > > > On 03/20/2016 07:28 PM, marcin.krzeminski@nokia.com wrote: >> From: Marcin Krzeminski <marcin.krzeminski@nokia.com> >> >> This patch adds only 4byte address mode (does not cover dummy cycles). >> This mode is needed to access more than 16 MiB of flash. >> >> Signed-off-by: Marcin Krzeminski <marcin.krzeminski@nokia.com> >> Reviewed-by: Peter Crosthwaite <crosthwaite.peter@gmail.com> >> --- >> hw/block/m25p80.c | 43 +++++++++++++++++++++++++++++++++---------- >> 1 file changed, 33 insertions(+), 10 deletions(-) >> >> diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c >> index c5de4ee..101a43f 100644 >> --- a/hw/block/m25p80.c >> +++ b/hw/block/m25p80.c >> @@ -237,6 +237,9 @@ typedef enum { >> ERASE_32K = 0x52, >> ERASE_SECTOR = 0xd8, >> >> + EN_4BYTE_ADDR = 0xB7, >> + EX_4BYTE_ADDR = 0xE9, >> + >> EXTEND_ADDR_READ = 0xC8, >> EXTEND_ADDR_WRITE = 0xC5, >> >> @@ -269,6 +272,7 @@ typedef struct Flash { >> uint8_t cmd_in_progress; >> uint64_t cur_addr; >> bool write_enable; >> + bool four_bytes_address_mode; >> bool reset_enable; >> uint8_t ear; >> >> @@ -406,12 +410,25 @@ void flash_write8(Flash *s, uint64_t addr, uint8_t data) >> s->dirty_page = page; >> } >> >> +static inline int get_addr_length(Flash *s) >> +{ >> + return s->four_bytes_address_mode ? 4 : 3; >> +} >> + >> static void complete_collecting_data(Flash *s) >> { >> - s->cur_addr = s->data[0] << 16; >> - s->cur_addr |= s->data[1] << 8; >> - s->cur_addr |= s->data[2]; >> - s->cur_addr += (s->ear & 0x3) * MAX_3BYTES_SIZE; >> + int i; >> + >> + s->cur_addr = 0; >> + >> + for (i = 0; i < get_addr_length(s); ++i) { >> + s->cur_addr <<= 8; >> + s->cur_addr |= s->data[i]; >> + } >> + >> + if (get_addr_length(s) == 3) { >> + s->cur_addr += (s->ear & 0x3) * MAX_3BYTES_SIZE; >> + } >> >> s->state = STATE_IDLE; >> >> @@ -452,6 +469,7 @@ static void reset_memory(Flash *s) >> s->cmd_in_progress = NOP; >> s->cur_addr = 0; >> s->ear = 0; >> + s->four_bytes_address_mode = false; >> s->len = 0; >> s->needed_bytes = 0; >> s->pos = 0; >> @@ -480,7 +498,7 @@ static void decode_new_cmd(Flash *s, uint32_t value) >> case DPP: >> case QPP: >> case PP: >> - s->needed_bytes = 3; >> + s->needed_bytes = get_addr_length(s); >> s->pos = 0; >> s->len = 0; >> s->state = STATE_COLLECTING_DATA; >> @@ -489,7 +507,7 @@ static void decode_new_cmd(Flash *s, uint32_t value) >> case FAST_READ: >> case DOR: >> case QOR: >> - s->needed_bytes = 4; >> + s->needed_bytes = get_addr_length(s) + 1; >> s->pos = 0; >> s->len = 0; >> s->state = STATE_COLLECTING_DATA; >> @@ -501,9 +519,8 @@ static void decode_new_cmd(Flash *s, uint32_t value) >> case JEDEC_SPANSION: >> s->needed_bytes = 4; >> break; >> - case JEDEC_NUMONYX: > > JEDEC_NUMONYX is being removed ? > >> default: >> - s->needed_bytes = 5; >> + s->needed_bytes = get_addr_length(s) + 2; >> } >> s->pos = 0; >> s->len = 0; >> @@ -516,9 +533,8 @@ static void decode_new_cmd(Flash *s, uint32_t value) >> case JEDEC_SPANSION: >> s->needed_bytes = 6; >> break; >> - case JEDEC_NUMONYX: > > and here also. Is that a typo ? Hello, As Peter C request NUMONYX is default for this series. As more flashes models are ongoing I plan to restore case JEDEC_NUMONYX and leave default to does nothing. Thanks, Marcin > > > Thanks, > > C. > > >> default: >> - s->needed_bytes = 8; >> + s->needed_bytes = get_addr_length(s) + 4; >> } >> s->pos = 0; >> s->len = 0; >> @@ -575,6 +591,12 @@ static void decode_new_cmd(Flash *s, uint32_t value) >> break; >> case NOP: >> break; >> + case EN_4BYTE_ADDR: >> + s->four_bytes_address_mode = true; >> + break; >> + case EX_4BYTE_ADDR: >> + s->four_bytes_address_mode = false; >> + break; >> case EXTEND_ADDR_READ: >> s->data[0] = s->ear; >> s->pos = 0; >> @@ -729,6 +751,7 @@ static const VMStateDescription vmstate_m25p80 = { >> VMSTATE_UINT8(cmd_in_progress, Flash), >> VMSTATE_UINT64(cur_addr, Flash), >> VMSTATE_BOOL(write_enable, Flash), >> + VMSTATE_BOOL(four_bytes_address_mode, Flash), >> VMSTATE_UINT8(ear, Flash), >> VMSTATE_BOOL(reset_enable, Flash), >> VMSTATE_END_OF_LIST() >> > > >
diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c index c5de4ee..101a43f 100644 --- a/hw/block/m25p80.c +++ b/hw/block/m25p80.c @@ -237,6 +237,9 @@ typedef enum { ERASE_32K = 0x52, ERASE_SECTOR = 0xd8, + EN_4BYTE_ADDR = 0xB7, + EX_4BYTE_ADDR = 0xE9, + EXTEND_ADDR_READ = 0xC8, EXTEND_ADDR_WRITE = 0xC5, @@ -269,6 +272,7 @@ typedef struct Flash { uint8_t cmd_in_progress; uint64_t cur_addr; bool write_enable; + bool four_bytes_address_mode; bool reset_enable; uint8_t ear; @@ -406,12 +410,25 @@ void flash_write8(Flash *s, uint64_t addr, uint8_t data) s->dirty_page = page; } +static inline int get_addr_length(Flash *s) +{ + return s->four_bytes_address_mode ? 4 : 3; +} + static void complete_collecting_data(Flash *s) { - s->cur_addr = s->data[0] << 16; - s->cur_addr |= s->data[1] << 8; - s->cur_addr |= s->data[2]; - s->cur_addr += (s->ear & 0x3) * MAX_3BYTES_SIZE; + int i; + + s->cur_addr = 0; + + for (i = 0; i < get_addr_length(s); ++i) { + s->cur_addr <<= 8; + s->cur_addr |= s->data[i]; + } + + if (get_addr_length(s) == 3) { + s->cur_addr += (s->ear & 0x3) * MAX_3BYTES_SIZE; + } s->state = STATE_IDLE; @@ -452,6 +469,7 @@ static void reset_memory(Flash *s) s->cmd_in_progress = NOP; s->cur_addr = 0; s->ear = 0; + s->four_bytes_address_mode = false; s->len = 0; s->needed_bytes = 0; s->pos = 0; @@ -480,7 +498,7 @@ static void decode_new_cmd(Flash *s, uint32_t value) case DPP: case QPP: case PP: - s->needed_bytes = 3; + s->needed_bytes = get_addr_length(s); s->pos = 0; s->len = 0; s->state = STATE_COLLECTING_DATA; @@ -489,7 +507,7 @@ static void decode_new_cmd(Flash *s, uint32_t value) case FAST_READ: case DOR: case QOR: - s->needed_bytes = 4; + s->needed_bytes = get_addr_length(s) + 1; s->pos = 0; s->len = 0; s->state = STATE_COLLECTING_DATA; @@ -501,9 +519,8 @@ static void decode_new_cmd(Flash *s, uint32_t value) case JEDEC_SPANSION: s->needed_bytes = 4; break; - case JEDEC_NUMONYX: default: - s->needed_bytes = 5; + s->needed_bytes = get_addr_length(s) + 2; } s->pos = 0; s->len = 0; @@ -516,9 +533,8 @@ static void decode_new_cmd(Flash *s, uint32_t value) case JEDEC_SPANSION: s->needed_bytes = 6; break; - case JEDEC_NUMONYX: default: - s->needed_bytes = 8; + s->needed_bytes = get_addr_length(s) + 4; } s->pos = 0; s->len = 0; @@ -575,6 +591,12 @@ static void decode_new_cmd(Flash *s, uint32_t value) break; case NOP: break; + case EN_4BYTE_ADDR: + s->four_bytes_address_mode = true; + break; + case EX_4BYTE_ADDR: + s->four_bytes_address_mode = false; + break; case EXTEND_ADDR_READ: s->data[0] = s->ear; s->pos = 0; @@ -729,6 +751,7 @@ static const VMStateDescription vmstate_m25p80 = { VMSTATE_UINT8(cmd_in_progress, Flash), VMSTATE_UINT64(cur_addr, Flash), VMSTATE_BOOL(write_enable, Flash), + VMSTATE_BOOL(four_bytes_address_mode, Flash), VMSTATE_UINT8(ear, Flash), VMSTATE_BOOL(reset_enable, Flash), VMSTATE_END_OF_LIST()