cris: remove arch/cris/arch-v32/lib/nand_init.S
Commit 3f50c0673c ("CRIS v32: Update
boot/rescue/head.S code") removed the last reference to that file. So
this file is unused since v2.6.25.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Paul Bolle
Jiri Kosina
parent
6be9dd121d
commit
c0b5bf090b
@ -1,178 +0,0 @@
|
|||||||
##=============================================================================
|
|
||||||
##
|
|
||||||
## nand_init.S
|
|
||||||
##
|
|
||||||
## The bootrom copies data from the NAND flash to the internal RAM but
|
|
||||||
## due to a bug/feature we can only trust the 256 first bytes. So this
|
|
||||||
## code copies more data from NAND flash to internal RAM. Obvioulsy this
|
|
||||||
## code must fit in the first 256 bytes so alter with care.
|
|
||||||
##
|
|
||||||
## Some notes about the bug/feature for future reference:
|
|
||||||
## The bootrom copies the first 127 KB from NAND flash to internal
|
|
||||||
## memory. The problem is that it does a bytewise copy. NAND flashes
|
|
||||||
## does autoincrement on the address so for a 16-bite device each
|
|
||||||
## read/write increases the address by two. So the copy loop in the
|
|
||||||
## bootrom will discard every second byte. This is solved by inserting
|
|
||||||
## zeroes in every second byte in the first erase block.
|
|
||||||
##
|
|
||||||
## The bootrom also incorrectly assumes that it can read the flash
|
|
||||||
## linear with only one read command but the flash will actually
|
|
||||||
## switch between normal area and spare area if you do that so we
|
|
||||||
## can't trust more than the first 256 bytes.
|
|
||||||
##
|
|
||||||
##=============================================================================
|
|
||||||
|
|
||||||
#include <arch/hwregs/asm/reg_map_asm.h>
|
|
||||||
#include <arch/hwregs/asm/gio_defs_asm.h>
|
|
||||||
#include <arch/hwregs/asm/pinmux_defs_asm.h>
|
|
||||||
#include <arch/hwregs/asm/bif_core_defs_asm.h>
|
|
||||||
#include <arch/hwregs/asm/config_defs_asm.h>
|
|
||||||
|
|
||||||
;; There are 8-bit NAND flashes and 16-bit NAND flashes.
|
|
||||||
;; We need to treat them slightly different.
|
|
||||||
#if CONFIG_ETRAX_FLASH_BUSWIDTH==2
|
|
||||||
#define PAGE_SIZE 256
|
|
||||||
#else
|
|
||||||
#error 2
|
|
||||||
#define PAGE_SIZE 512
|
|
||||||
#endif
|
|
||||||
#define ERASE_BLOCK 16384
|
|
||||||
|
|
||||||
;; GPIO pins connected to NAND flash
|
|
||||||
#define CE 4
|
|
||||||
#define CLE 5
|
|
||||||
#define ALE 6
|
|
||||||
#define BY 7
|
|
||||||
|
|
||||||
;; Address space for NAND flash
|
|
||||||
#define NAND_RD_ADDR 0x90000000
|
|
||||||
#define NAND_WR_ADDR 0x94000000
|
|
||||||
|
|
||||||
#define READ_CMD 0x00
|
|
||||||
|
|
||||||
;; Readability macros
|
|
||||||
#define CSP_MASK \
|
|
||||||
REG_MASK(bif_core, rw_grp3_cfg, gated_csp0) | \
|
|
||||||
REG_MASK(bif_core, rw_grp3_cfg, gated_csp1)
|
|
||||||
#define CSP_VAL \
|
|
||||||
REG_STATE(bif_core, rw_grp3_cfg, gated_csp0, rd) | \
|
|
||||||
REG_STATE(bif_core, rw_grp3_cfg, gated_csp1, wr)
|
|
||||||
|
|
||||||
;;----------------------------------------------------------------------------
|
|
||||||
;; Macros to set/clear GPIO bits
|
|
||||||
|
|
||||||
.macro SET x
|
|
||||||
or.b (1<<\x),$r9
|
|
||||||
move.d $r9, [$r2]
|
|
||||||
.endm
|
|
||||||
|
|
||||||
.macro CLR x
|
|
||||||
and.b ~(1<<\x),$r9
|
|
||||||
move.d $r9, [$r2]
|
|
||||||
.endm
|
|
||||||
|
|
||||||
;;----------------------------------------------------------------------------
|
|
||||||
|
|
||||||
nand_boot:
|
|
||||||
;; Check if nand boot was selected
|
|
||||||
move.d REG_ADDR(config, regi_config, r_bootsel), $r0
|
|
||||||
move.d [$r0], $r0
|
|
||||||
and.d REG_MASK(config, r_bootsel, boot_mode), $r0
|
|
||||||
cmp.d REG_STATE(config, r_bootsel, boot_mode, nand), $r0
|
|
||||||
bne normal_boot ; No NAND boot
|
|
||||||
nop
|
|
||||||
|
|
||||||
copy_nand_to_ram:
|
|
||||||
;; copy_nand_to_ram
|
|
||||||
;; Arguments
|
|
||||||
;; r10 - destination
|
|
||||||
;; r11 - source offset
|
|
||||||
;; r12 - size
|
|
||||||
;; r13 - Address to jump to after completion
|
|
||||||
;; Note : r10-r12 are clobbered on return
|
|
||||||
;; Registers used:
|
|
||||||
;; r0 - NAND_RD_ADDR
|
|
||||||
;; r1 - NAND_WR_ADDR
|
|
||||||
;; r2 - reg_gio_rw_pa_dout
|
|
||||||
;; r3 - reg_gio_r_pa_din
|
|
||||||
;; r4 - tmp
|
|
||||||
;; r5 - byte counter within a page
|
|
||||||
;; r6 - reg_pinmux_rw_pa
|
|
||||||
;; r7 - reg_gio_rw_pa_oe
|
|
||||||
;; r8 - reg_bif_core_rw_grp3_cfg
|
|
||||||
;; r9 - reg_gio_rw_pa_dout shadow
|
|
||||||
move.d 0x90000000, $r0
|
|
||||||
move.d 0x94000000, $r1
|
|
||||||
move.d REG_ADDR(gio, regi_gio, rw_pa_dout), $r2
|
|
||||||
move.d REG_ADDR(gio, regi_gio, r_pa_din), $r3
|
|
||||||
move.d REG_ADDR(pinmux, regi_pinmux, rw_pa), $r6
|
|
||||||
move.d REG_ADDR(gio, regi_gio, rw_pa_oe), $r7
|
|
||||||
move.d REG_ADDR(bif_core, regi_bif_core, rw_grp3_cfg), $r8
|
|
||||||
|
|
||||||
#if CONFIG_ETRAX_FLASH_BUSWIDTH==2
|
|
||||||
lsrq 1, $r11
|
|
||||||
#endif
|
|
||||||
;; Set up GPIO
|
|
||||||
move.d [$r2], $r9
|
|
||||||
move.d [$r7], $r4
|
|
||||||
or.b (1<<ALE) | (1 << CLE) | (1<<CE), $r4
|
|
||||||
move.d $r4, [$r7]
|
|
||||||
|
|
||||||
;; Set up bif
|
|
||||||
move.d [$r8], $r4
|
|
||||||
and.d CSP_MASK, $r4
|
|
||||||
or.d CSP_VAL, $r4
|
|
||||||
move.d $r4, [$r8]
|
|
||||||
|
|
||||||
1: ;; Copy one page
|
|
||||||
CLR CE
|
|
||||||
SET CLE
|
|
||||||
moveq READ_CMD, $r4
|
|
||||||
move.b $r4, [$r1]
|
|
||||||
moveq 20, $r4
|
|
||||||
2: bne 2b
|
|
||||||
subq 1, $r4
|
|
||||||
CLR CLE
|
|
||||||
SET ALE
|
|
||||||
clear.w [$r1] ; Column address = 0
|
|
||||||
move.d $r11, $r4
|
|
||||||
lsrq 8, $r4
|
|
||||||
move.b $r4, [$r1] ; Row address
|
|
||||||
lsrq 8, $r4
|
|
||||||
move.b $r4, [$r1] ; Row address
|
|
||||||
moveq 20, $r4
|
|
||||||
2: bne 2b
|
|
||||||
subq 1, $r4
|
|
||||||
CLR ALE
|
|
||||||
2: move.d [$r3], $r4
|
|
||||||
and.d 1 << BY, $r4
|
|
||||||
beq 2b
|
|
||||||
movu.w PAGE_SIZE, $r5
|
|
||||||
2: ; Copy one byte/word
|
|
||||||
#if CONFIG_ETRAX_FLASH_BUSWIDTH==2
|
|
||||||
move.w [$r0], $r4
|
|
||||||
#else
|
|
||||||
move.b [$r0], $r4
|
|
||||||
#endif
|
|
||||||
subq 1, $r5
|
|
||||||
bne 2b
|
|
||||||
#if CONFIG_ETRAX_FLASH_BUSWIDTH==2
|
|
||||||
move.w $r4, [$r10+]
|
|
||||||
subu.w PAGE_SIZE*2, $r12
|
|
||||||
#else
|
|
||||||
move.b $r4, [$r10+]
|
|
||||||
subu.w PAGE_SIZE, $r12
|
|
||||||
#endif
|
|
||||||
bpl 1b
|
|
||||||
addu.w PAGE_SIZE, $r11
|
|
||||||
|
|
||||||
;; End of copy
|
|
||||||
jump $r13
|
|
||||||
nop
|
|
||||||
|
|
||||||
;; This will warn if the code above is too large. If you consider
|
|
||||||
;; to remove this you don't understand the bug/feature.
|
|
||||||
.org 256
|
|
||||||
.org ERASE_BLOCK
|
|
||||||
|
|
||||||
normal_boot:
|
|
||||||
Loading…
Reference in New Issue
Block a user