1 /* $Id: head.S,v 1.6 2003/04/28 05:31:46 starvik Exp $
3 * Head of the kernel - alter with care
5 * Copyright (C) 2000, 2001 Axis Communications AB
7 * Authors: Bjorn Wesen (bjornw@axis.com)
10 * Revision 1.6 2003/04/28 05:31:46 starvik
11 * Added section attributes
13 * Revision 1.5 2002/12/11 15:42:02 starvik
14 * Extracted v10 (ETRAX 100LX) specific stuff from arch/cris/kernel/*.c
16 * Revision 1.4 2002/11/07 09:00:44 starvik
17 * Names changed for init sections
18 * init_task_union -> init_thread_union
20 * Revision 1.3 2002/02/05 15:38:23 bjornw
21 * Oops.. non-CRAMFS_MAGIC should jump over the copying, not into it...
23 * Revision 1.2 2001/12/18 13:35:19 bjornw
24 * Applied the 2.4.13->2.4.16 CRIS patch to 2.5.1 (is a copy of 2.4.15).
26 * Revision 1.43 2001/11/08 15:09:43 starvik
27 * Only start MII clock if Ethernet is configured
29 * Revision 1.42 2001/11/08 14:37:34 starvik
30 * Start MII clock early to make sure that it is running at tranceiver reset
32 * Revision 1.41 2001/10/29 14:55:58 pkj
33 * Corrected pa$r0 to par0.
35 * Revision 1.40 2001/10/03 14:59:57 pkj
36 * Added support for resetting the Bluetooth hardware.
38 * Revision 1.39 2001/10/01 14:45:03 bjornw
39 * Removed underscores and added register prefixes
41 * Revision 1.38 2001/09/21 07:14:11 jonashg
42 * Made root filesystem (cramfs) use mtdblock driver when booting from flash.
44 * Revision 1.37 2001/09/11 13:44:29 orjanf
45 * Decouple usage of serial ports for debug and kgdb.
47 * Revision 1.36 2001/06/29 12:39:31 pkj
48 * Added support for mirroring the first flash to just below the
49 * second one, to make them look consecutive to cramfs.
51 * Revision 1.35 2001/06/25 14:07:00 hp
53 * * head.S: Use IO_STATE, IO_FIELD and IO_MASK constructs instead of
54 * magic numbers. Add comment that -traditional must not be used.
55 * * entry.S (SYMBOL_NAME): Change redefinition to use ## concatenation.
56 * Correct and update comment.
57 * * Makefile (.S.o): Don't use -traditional. Add comment why the
58 * toplevel rule can't be used (now that there's a reason).
60 * Revision 1.34 2001/05/15 07:08:14 hp
61 * Tweak "notice" to reflect that both r8 r9 are used
63 * Revision 1.33 2001/05/15 06:40:05 hp
64 * Put bulk of code in .text.init, data in .data.init
66 * Revision 1.32 2001/05/15 06:18:56 hp
67 * Execute review comment: s/bcc/bhs/g; s/bcs/blo/g
69 * Revision 1.31 2001/05/15 06:08:40 hp
70 * Add sentence about autodetecting the bit31-MMU-bug
72 * Revision 1.30 2001/05/15 06:00:05 hp
73 * Update comment: LOW_MAP is not forced on xsim anymore.
75 * Revision 1.29 2001/04/18 12:51:59 orjanf
76 * * Reverted review change regarding the use of bcs/bcc.
77 * * Removed non-working LED-clearing code.
79 * Revision 1.28 2001/04/17 13:58:39 orjanf
80 * * Renamed CONFIG_KGDB to CONFIG_ETRAX_KGDB.
82 * Revision 1.27 2001/04/17 11:42:35 orjanf
83 * Changed according to review:
84 * * Added comment explaining memory map bug.
85 * * Changed bcs and bcc to blo and bhs, respectively.
86 * * Removed mentioning of Stallone and Olga boards.
88 * Revision 1.26 2001/04/06 12:31:07 jonashg
89 * Check for cramfs in flash before RAM instead of RAM before flash.
91 * Revision 1.25 2001/04/04 06:23:53 starvik
92 * Initialize DRAM if not already initialized
94 * Revision 1.24 2001/04/03 11:12:00 starvik
95 * Removed dram init (done by rescue or etrax100boot
98 * Revision 1.23 2001/04/03 09:53:03 starvik
99 * Include hw_settings.S
101 * Revision 1.22 2001/03/26 14:23:26 bjornw
102 * Namechange of some config options
104 * Revision 1.21 2001/03/08 12:14:41 bjornw
105 * * Config name for ETRAX IDE was renamed
106 * * Removed G27 auto-setting when JULIETTE is chosen (need to make this
107 * a new config option later)
109 * Revision 1.20 2001/02/23 12:47:56 bjornw
110 * MMU regs during LOW_MAP updated to reflect a newer reality
112 * Revision 1.19 2001/02/19 11:12:07 bjornw
113 * Changed comment header format
115 * Revision 1.18 2001/02/15 07:25:38 starvik
116 * Added support for synchronous serial ports
118 * Revision 1.17 2001/02/08 15:53:13 starvik
119 * Last commit removed some important ifdefs
121 * Revision 1.16 2001/02/08 15:20:38 starvik
122 * Include dram_init.S as inline
124 * Revision 1.15 2001/01/29 18:12:01 bjornw
125 * Corrected some comments
127 * Revision 1.14 2001/01/29 13:11:29 starvik
128 * Include dram_init.S (with DRAM/SDRAM initialization)
130 * Revision 1.13 2001/01/23 14:54:57 markusl
132 * i.e. added r_gen_config settings
134 * Revision 1.12 2001/01/19 16:16:29 perf
135 * Added temporary mapping of 0x0c->0x0c to avoid flash loading confusion.
136 * Renamed serial options from ETRAX100 to ETRAX.
138 * Revision 1.11 2001/01/16 16:31:38 bjornw
139 * * Changed name and semantics of running_from_flash to romfs_in_flash,
140 * set by head.S to indicate to setup.c whether there is a cramfs image
141 * after the kernels BSS or not. Should work for all three boot-cases
142 * (DRAM with cramfs in DRAM, DRAM with cramfs in flash (compressed boot),
143 * and flash with cramfs in flash)
145 * Revision 1.10 2001/01/16 14:12:21 bjornw
146 * * Check for cramfs start passed in r9 from the decompressor, if all other
147 * cramfs options fail (if we boot from DRAM but don't find a cramfs image
148 * after the kernel in DRAM, it is probably still in the flash)
149 * * Check magic in cramfs detection when booting from flash directly
151 * Revision 1.9 2001/01/15 17:17:02 bjornw
152 * * Corrected the code that detects the cramfs lengths
153 * * Added a comment saying that the above does not work due to other
156 * Revision 1.8 2001/01/15 16:27:51 jonashg
157 * Made boot after flashing work.
158 * * end destination is __vmlinux_end in RAM.
159 * * _romfs_start moved because of virtual memory.
161 * Revision 1.7 2000/11/21 13:55:29 bjornw
162 * Use CONFIG_CRIS_LOW_MAP for the low VM map instead of explicit CPU type
164 * Revision 1.6 2000/10/06 12:36:55 bjornw
165 * Forgot swapper_pg_dir when changing memory map..
167 * Revision 1.5 2000/10/04 16:49:30 bjornw
168 * * Fixed memory mapping in LX
169 * * Check for cramfs instead of romfs
173 #include <linux/config.h>
174 #define ASSEMBLER_MACROS_ONLY
175 /* The IO_* macros use the ## token concatenation operator, so
176 -traditional must not be used when assembling this file. */
177 #include <asm/arch/sv_addr_ag.h>
179 #define CRAMFS_MAGIC 0x28cd3d45
180 #define RAM_INIT_MAGIC 0x56902387
182 #define START_ETHERNET_CLOCK IO_STATE(R_NETWORK_GEN_CONFIG, enable, on) |\
183 IO_STATE(R_NETWORK_GEN_CONFIG, phy, mii_clk)
190 .globl romfs_in_flash
191 .globl swapper_pg_dir
195 ;; This is the entry point of the kernel. We are in supervisor mode.
196 ;; 0x00000000 if Flash, 0x40004000 if DRAM
197 ;; since etrax actually starts at address 2 when booting from flash, we
198 ;; put a nop (2 bytes) here first so we dont accidentally skip the di
200 ;; NOTICE! The registers r8 and r9 are used as parameters carrying
201 ;; information from the decompressor (if the kernel was compressed).
202 ;; They should not be used in the code below until read.
207 ;; First setup the kseg_c mapping from where the kernel is linked
208 ;; to 0x40000000 (where the actual DRAM resides) otherwise
209 ;; we cannot do very much! See arch/cris/README.mm
211 ;; Notice that since we're potentially running at 0x00 or 0x40 right now,
212 ;; we will get a fault as soon as we enable the MMU if we dont
213 ;; temporarily map those segments linearily.
215 ;; Due to a bug in Etrax-100 LX version 1 we need to map the memory
216 ;; slightly different. The bug is that you can't remap bit 31 of
217 ;; an address. Though we can check the version register for
218 ;; whether the bug is present, some constants would then have to
219 ;; be variables, so we don't. The drawback is that you can "only" map
220 ;; 1G per process with CONFIG_CRIS_LOW_MAP.
222 #ifdef CONFIG_CRIS_LOW_MAP
223 ; kseg mappings, temporary map of 0xc0->0x40
224 move.d IO_FIELD (R_MMU_KBASE_HI, base_c, 4) \
225 | IO_FIELD (R_MMU_KBASE_HI, base_b, 0xb) \
226 | IO_FIELD (R_MMU_KBASE_HI, base_9, 9) \
227 | IO_FIELD (R_MMU_KBASE_HI, base_8, 8), $r0
228 move.d $r0, [R_MMU_KBASE_HI]
230 ; temporary map of 0x40->0x40 and 0x60->0x40
231 move.d IO_FIELD (R_MMU_KBASE_LO, base_6, 4) \
232 | IO_FIELD (R_MMU_KBASE_LO, base_4, 4), $r0
233 move.d $r0, [R_MMU_KBASE_LO]
235 ; mmu enable, segs e,c,b,a,6,5,4,0 segment mapped
236 move.d IO_STATE (R_MMU_CONFIG, mmu_enable, enable) \
237 | IO_STATE (R_MMU_CONFIG, inv_excp, enable) \
238 | IO_STATE (R_MMU_CONFIG, acc_excp, enable) \
239 | IO_STATE (R_MMU_CONFIG, we_excp, enable) \
240 | IO_STATE (R_MMU_CONFIG, seg_f, page) \
241 | IO_STATE (R_MMU_CONFIG, seg_e, seg) \
242 | IO_STATE (R_MMU_CONFIG, seg_d, page) \
243 | IO_STATE (R_MMU_CONFIG, seg_c, seg) \
244 | IO_STATE (R_MMU_CONFIG, seg_b, seg) \
245 | IO_STATE (R_MMU_CONFIG, seg_a, seg) \
246 | IO_STATE (R_MMU_CONFIG, seg_9, page) \
247 | IO_STATE (R_MMU_CONFIG, seg_8, page) \
248 | IO_STATE (R_MMU_CONFIG, seg_7, page) \
249 | IO_STATE (R_MMU_CONFIG, seg_6, seg) \
250 | IO_STATE (R_MMU_CONFIG, seg_5, seg) \
251 | IO_STATE (R_MMU_CONFIG, seg_4, seg) \
252 | IO_STATE (R_MMU_CONFIG, seg_3, page) \
253 | IO_STATE (R_MMU_CONFIG, seg_2, page) \
254 | IO_STATE (R_MMU_CONFIG, seg_1, page) \
255 | IO_STATE (R_MMU_CONFIG, seg_0, seg), $r0
256 move.d $r0, [R_MMU_CONFIG]
259 move.d IO_FIELD (R_MMU_KBASE_HI, base_e, 8) \
260 | IO_FIELD (R_MMU_KBASE_HI, base_c, 4) \
261 | IO_FIELD (R_MMU_KBASE_HI, base_b, 0xb), $r0
262 move.d $r0, [R_MMU_KBASE_HI]
264 ; temporary map of 0x40->0x40 and 0x00->0x00
265 move.d IO_FIELD (R_MMU_KBASE_LO, base_4, 4), $r0
266 move.d $r0, [R_MMU_KBASE_LO]
268 ; mmu enable, segs f,e,c,b,4,0 segment mapped
269 move.d IO_STATE (R_MMU_CONFIG, mmu_enable, enable) \
270 | IO_STATE (R_MMU_CONFIG, inv_excp, enable) \
271 | IO_STATE (R_MMU_CONFIG, acc_excp, enable) \
272 | IO_STATE (R_MMU_CONFIG, we_excp, enable) \
273 | IO_STATE (R_MMU_CONFIG, seg_f, seg) \
274 | IO_STATE (R_MMU_CONFIG, seg_e, seg) \
275 | IO_STATE (R_MMU_CONFIG, seg_d, page) \
276 | IO_STATE (R_MMU_CONFIG, seg_c, seg) \
277 | IO_STATE (R_MMU_CONFIG, seg_b, seg) \
278 | IO_STATE (R_MMU_CONFIG, seg_a, page) \
279 | IO_STATE (R_MMU_CONFIG, seg_9, page) \
280 | IO_STATE (R_MMU_CONFIG, seg_8, page) \
281 | IO_STATE (R_MMU_CONFIG, seg_7, page) \
282 | IO_STATE (R_MMU_CONFIG, seg_6, page) \
283 | IO_STATE (R_MMU_CONFIG, seg_5, page) \
284 | IO_STATE (R_MMU_CONFIG, seg_4, seg) \
285 | IO_STATE (R_MMU_CONFIG, seg_3, page) \
286 | IO_STATE (R_MMU_CONFIG, seg_2, page) \
287 | IO_STATE (R_MMU_CONFIG, seg_1, page) \
288 | IO_STATE (R_MMU_CONFIG, seg_0, seg), $r0
289 move.d $r0, [R_MMU_CONFIG]
292 ;; Now we need to sort out the segments and their locations in RAM or
293 ;; Flash. The image in the Flash (or in DRAM) consists of 3 pieces:
294 ;; 1) kernel text, 2) kernel data, 3) ROM filesystem image
295 ;; But the linker has linked the kernel to expect this layout in
297 ;; 1) kernel text, 2) kernel data, 3) kernel BSS
298 ;; (the location of the ROM filesystem is determined by the krom driver)
299 ;; If we boot this from Flash, we want to keep the ROM filesystem in
300 ;; the flash, we want to copy the text and need to copy the data to DRAM.
301 ;; But if we boot from DRAM, we need to move the ROMFS image
302 ;; from its position after kernel data, to after kernel BSS, BEFORE the
303 ;; kernel starts using the BSS area (since its "overlayed" with the ROMFS)
305 ;; In both cases, we start in un-cached mode, and need to jump into a
306 ;; cached PC after we're done fiddling around with the segments.
308 ;; arch/etrax100/etrax100.ld sets some symbols that define the start
309 ;; and end of each segment.
311 ;; Check if we start from DRAM or FLASH by testing PC
314 and.d 0x7fffffff,$r0 ; get rid of the non-cache bit
315 cmp.d 0x10000,$r0 ; arbitrary... just something above this code
319 jump _inram ; enter cached ram
321 ;; Jumpgate for branches.
325 ;; Put this in a suitable section where we can reclaim storage
327 .section ".init.text", "ax"
329 #ifdef CONFIG_ETRAX_ETHERNET
330 ;; Start MII clock to make sure it is running when tranceiver is reset
331 move.d START_ETHERNET_CLOCK, $r0
332 move.d $r0, [R_NETWORK_GEN_CONFIG]
335 ;; We need to initialze DRAM registers before we start using the DRAM
337 cmp.d RAM_INIT_MAGIC, $r8 ; Already initialized?
338 beq _dram_init_finished
341 #include "../lib/dram_init.S"
344 ;; Copy text+data to DRAM
345 ;; This is fragile - the calculation of r4 as the image size depends
346 ;; on that the labels below actually are the first and last positions
347 ;; in the linker-script.
349 ;; Then the locating of the cramfs image depends on the aforementioned
350 ;; image being located in the flash at 0. This is most often not true,
351 ;; thus the following does not work (normally there is a rescue-block
352 ;; between the physical start of the flash and the flash-image start,
353 ;; and when run with compression, the kernel is actually unpacked to
354 ;; DRAM and we never get here in the first place :))
356 moveq 0, $r0 ; source
357 move.d text_start, $r1 ; destination
358 move.d __vmlinux_end, $r2 ; end destination
360 sub.d $r1, $r4 ; r4=__vmlinux_end in flash, used below
361 1: move.w [$r0+], $r3
367 ;; We keep the cramfs in the flash.
368 ;; There might be none, but that does not matter because
369 ;; we don't do anything than read some bytes here.
372 move.d $r0, [romfs_length] ; default if there is no cramfs
374 move.d [$r4], $r0 ; cramfs_super.magic
375 cmp.d CRAMFS_MAGIC, $r0
378 move.d [$r4 + 4], $r0 ; cramfs_super.size
379 move.d $r0, [romfs_length]
380 #ifdef CONFIG_CRIS_LOW_MAP
381 add.d 0x50000000, $r4 ; add flash start in virtual memory (cached)
383 add.d 0xf0000000, $r4 ; add flash start in virtual memory (cached)
385 move.d $r4, [romfs_start]
388 move.d $r0, [romfs_in_flash]
390 jump _start_it ; enter code, cached this time
393 ;; Move the ROM fs to after BSS end. This assumes that the cramfs
394 ;; second longword contains the length of the cramfs
397 move.d $r0, [romfs_length] ; default if there is no cramfs
399 ;; The kernel could have been unpacked to DRAM by the loader, but
400 ;; the cramfs image could still be in the Flash directly after the
401 ;; compressed kernel image. The loader passes the address of the
402 ;; byte succeeding the last compressed byte in the flash in the
403 ;; register r9 when starting the kernel. Check if r9 points to a
404 ;; decent cramfs image!
405 ;; (Notice that if this is not booted from the loader, r9 will be
406 ;; garbage but we do sanity checks on it, the chance that it points
407 ;; to a cramfs magic is small.. )
409 cmp.d 0x0ffffff8, $r9
410 bhs _no_romfs_in_flash ; r9 points outside the flash area
412 move.d [$r9], $r0 ; cramfs_super.magic
413 cmp.d CRAMFS_MAGIC, $r0
414 bne _no_romfs_in_flash
416 move.d [$r9+4], $r0 ; cramfs_super.length
417 move.d $r0, [romfs_length]
418 #ifdef CONFIG_CRIS_LOW_MAP
419 add.d 0x50000000, $r9 ; add flash start in virtual memory (cached)
421 add.d 0xf0000000, $r9 ; add flash start in virtual memory (cached)
423 move.d $r9, [romfs_start]
426 move.d $r0, [romfs_in_flash]
428 jump _start_it ; enter code, cached this time
432 ;; Check if there is a cramfs (magic value).
433 ;; Notice that we check for cramfs magic value - which is
434 ;; the "rom fs" we'll possibly use in 2.4 if not JFFS (which does
435 ;; not need this mechanism anyway)
437 move.d __vmlinux_end, $r0; the image will be after the vmlinux end address
438 move.d [$r0], $r1 ; cramfs assumes same endian on host/target
439 cmp.d CRAMFS_MAGIC, $r1; magic value in cramfs superblock
443 ;; Ok. What is its size ?
445 move.d [$r0 + 4], $r2 ; cramfs_super.size (again, no need to swapwb)
447 ;; We want to copy it to the end of the BSS
451 ;; Remember values so cramfs and setup can find this info
453 move.d $r1, [romfs_start] ; new romfs location
454 move.d $r2, [romfs_length]
456 ;; We need to copy it backwards, since they can be overlapping
461 ;; Go ahead. Make my loop.
463 lsrq 1, $r2 ; size is in bytes, we copy words
465 1: move.w [$r0=$r0-2],$r3
466 move.w $r3,[$r1=$r1-2]
472 ;; Dont worry that the BSS is tainted. It will be cleared later.
475 move.d $r0, [romfs_in_flash]
477 jump _start_it ; better skip the additional cramfs check below
481 ;; the kernel stack is overlayed with the task structure for each
482 ;; task. thus the initial kernel stack is in the same page as the
483 ;; init_task (but starts in the top of the page, size 8192)
484 move.d init_thread_union + 8192, $sp
485 move.d ibr_start,$r0 ; this symbol is set by the linker script
487 move.d $r0,[etrax_irv] ; set the interrupt base register and pointer
489 ;; Clear BSS region, from _bss_start to _end
491 move.d __bss_start, $r0
498 #ifdef CONFIG_BLK_DEV_ETRAXIDE
499 ;; disable ATA before enabling it in genconfig below
501 move.d $r0,[R_ATA_CTRL_DATA]
502 move.d $r0,[R_ATA_TRANSFER_CNT]
503 move.d $r0,[R_ATA_CONFIG]
505 move.d R_PORT_G_DATA, $r1
506 move.d $r0, [$r1]; assert ATA bus-reset
513 move.d 0x08000000,$r0
518 #ifdef CONFIG_JULIETTE
519 ;; configure external DMA channel 0 before enabling it in genconfig
522 move.d $r0,[R_EXT_DMA_0_ADDR]
523 ; cnt enable, word size, output, stop, size 0
524 move.d IO_STATE (R_EXT_DMA_0_CMD, cnt, enable) \
525 | IO_STATE (R_EXT_DMA_0_CMD, rqpol, ahigh) \
526 | IO_STATE (R_EXT_DMA_0_CMD, apol, ahigh) \
527 | IO_STATE (R_EXT_DMA_0_CMD, rq_ack, burst) \
528 | IO_STATE (R_EXT_DMA_0_CMD, wid, word) \
529 | IO_STATE (R_EXT_DMA_0_CMD, dir, output) \
530 | IO_STATE (R_EXT_DMA_0_CMD, run, stop) \
531 | IO_FIELD (R_EXT_DMA_0_CMD, trf_count, 0),$r0
532 move.d $r0,[R_EXT_DMA_0_CMD]
534 ;; reset dma4 and wait for completion
536 moveq IO_STATE (R_DMA_CH4_CMD, cmd, reset),$r0
537 move.b $r0,[R_DMA_CH4_CMD]
538 1: move.b [R_DMA_CH4_CMD],$r0
539 and.b IO_MASK (R_DMA_CH4_CMD, cmd),$r0
540 cmp.b IO_STATE (R_DMA_CH4_CMD, cmd, reset),$r0
544 ;; reset dma5 and wait for completion
546 moveq IO_STATE (R_DMA_CH5_CMD, cmd, reset),$r0
547 move.b $r0,[R_DMA_CH5_CMD]
548 1: move.b [R_DMA_CH5_CMD],$r0
549 and.b IO_MASK (R_DMA_CH5_CMD, cmd),$r0
550 cmp.b IO_STATE (R_DMA_CH5_CMD, cmd, reset),$r0
555 ;; Etrax product HW genconfig setup
558 #if (!defined(CONFIG_ETRAX_KGDB) || !defined(CONFIG_ETRAX_DEBUG_PORT0)) \
559 && !defined(CONFIG_DMA_MEMCPY)
560 ; DMA channels 6 and 7 to ser0, kgdb doesnt want DMA
561 or.d IO_STATE (R_GEN_CONFIG, dma7, serial0) \
562 | IO_STATE (R_GEN_CONFIG, dma6, serial0),$r0
564 #if !defined(CONFIG_ETRAX_KGDB) || !defined(CONFIG_ETRAX_DEBUG_PORT1)
565 ; DMA channels 8 and 9 to ser1, kgdb doesnt want DMA
566 or.d IO_STATE (R_GEN_CONFIG, dma9, serial1) \
567 | IO_STATE (R_GEN_CONFIG, dma8, serial1),$r0
569 #ifdef CONFIG_DMA_MEMCPY
570 ; 6/7 memory-memory DMA
571 or.d IO_STATE (R_GEN_CONFIG, dma7, intdma6) \
572 | IO_STATE (R_GEN_CONFIG, dma6, intdma7),$r0
574 #ifdef CONFIG_ETRAX_SERIAL_PORT2
575 ; Enable serial port 2
576 or.w IO_STATE (R_GEN_CONFIG, ser2, select),$r0
577 #if !defined(CONFIG_ETRAX_KGDB) || !defined(CONFIG_ETRAX_DEBUG_PORT2)
578 ; DMA channels 2 and 3 to ser2, kgdb doesnt want DMA
579 or.d IO_STATE (R_GEN_CONFIG, dma3, serial2) \
580 | IO_STATE (R_GEN_CONFIG, dma2, serial2),$r0
583 #if defined(CONFIG_ETRAX_SERIAL_PORT3) || defined(CONFIG_ETRAX_SYNCHRONOUS_SERIAL_PORT1)
584 ; Enable serial port 3
585 or.w IO_STATE (R_GEN_CONFIG, ser3, select),$r0
586 #if !defined(CONFIG_ETRAX_KGDB) || !defined(CONFIG_ETRAX_DEBUG_PORT3)
587 ; DMA channels 4 and 5 to ser3, kgdb doesnt want DMA
588 or.d IO_STATE (R_GEN_CONFIG, dma5, serial3) \
589 | IO_STATE (R_GEN_CONFIG, dma4, serial3),$r0
592 #if defined(CONFIG_ETRAX_PARALLEL_PORT0) || defined(CONFIG_ETRAX_ETHERNET_LPSLAVE)
593 ; parport 0 enabled using DMA 2/3
594 or.w IO_STATE (R_GEN_CONFIG, par0, select),$r0
596 #if defined(CONFIG_ETRAX_PARALLEL_PORT1) || defined(CONFIG_ETRAX_ETHERNET_LPSLAVE)
597 ; parport 1 enabled using DMA 4/5
598 or.w IO_STATE (R_GEN_CONFIG, par1, select),$r0
600 #ifdef CONFIG_ETRAX_IDE
601 ; DMA channels 2 and 3 to ATA, ATA enabled
602 or.d IO_STATE (R_GEN_CONFIG, dma3, ata) \
603 | IO_STATE (R_GEN_CONFIG, dma2, ata) \
604 | IO_STATE (R_GEN_CONFIG, ata, select),$r0
607 #ifdef CONFIG_ETRAX_USB_HOST_PORT1
608 ; Set the USB port 1 enable bit
609 or.d IO_STATE (R_GEN_CONFIG, usb1, select),$r0
611 #ifdef CONFIG_ETRAX_USB_HOST_PORT2
612 ; Set the USB port 2 enable bit
613 or.d IO_STATE (R_GEN_CONFIG, usb2, select),$r0
615 #ifdef CONFIG_ETRAX_USB_HOST
616 ; Connect DMA channels 8 and 9 to USB
617 and.d (~(IO_MASK (R_GEN_CONFIG, dma9) \
618 | IO_MASK (R_GEN_CONFIG, dma8))) \
619 | IO_STATE (R_GEN_CONFIG, dma9, usb) \
620 | IO_STATE (R_GEN_CONFIG, dma8, usb),$r0
623 #ifdef CONFIG_JULIETTE
624 ; DMA channels 4 and 5 to EXTDMA0, for Juliette
625 or.d IO_STATE (R_GEN_CONFIG, dma5, extdma0) \
626 | IO_STATE (R_GEN_CONFIG, dma4, extdma0),$r0
629 #if defined(CONFIG_BLUETOOTH) && (defined(CONFIG_BLUETOOTH_RESET_G10) || defined(CONFIG_BLUETOOTH_RESET_G11))
630 or.d IO_STATE (R_GEN_CONFIG, g8_15dir, out),$r0
633 move.d $r0,[genconfig_shadow] ; init a shadow register of R_GEN_CONFIG
635 #ifndef CONFIG_SVINTO_SIM
636 move.d $r0,[R_GEN_CONFIG]
640 move.b $r0,[R_DMA_CH6_CMD] ; reset (ser0 dma out)
641 move.b $r0,[R_DMA_CH7_CMD] ; reset (ser0 dma in)
642 1: move.b [R_DMA_CH6_CMD],$r0 ; wait for reset cycle to finish
647 1: move.b [R_DMA_CH7_CMD],$r0 ; wait for reset cycle to finish
654 moveq IO_STATE (R_DMA_CH8_CMD, cmd, reset),$r0
655 move.b $r0,[R_DMA_CH8_CMD] ; reset (ser1 dma out)
656 move.b $r0,[R_DMA_CH9_CMD] ; reset (ser1 dma in)
657 1: move.b [R_DMA_CH8_CMD],$r0 ; wait for reset cycle to finish
658 andq IO_MASK (R_DMA_CH8_CMD, cmd),$r0
659 cmpq IO_STATE (R_DMA_CH8_CMD, cmd, reset),$r0
662 1: move.b [R_DMA_CH9_CMD],$r0 ; wait for reset cycle to finish
663 andq IO_MASK (R_DMA_CH9_CMD, cmd),$r0
664 cmpq IO_STATE (R_DMA_CH9_CMD, cmd, reset),$r0
668 ;; setup port PA and PB default initial directions and data
669 ;; including their shadow registers
671 move.b CONFIG_ETRAX_DEF_R_PORT_PA_DIR,$r0
672 #if defined(CONFIG_BLUETOOTH) && defined(CONFIG_BLUETOOTH_RESET_PA7)
673 or.b IO_STATE (R_PORT_PA_DIR, dir7, output),$r0
675 move.b $r0,[port_pa_dir_shadow]
676 move.b $r0,[R_PORT_PA_DIR]
677 move.b CONFIG_ETRAX_DEF_R_PORT_PA_DATA,$r0
678 #if defined(CONFIG_BLUETOOTH) && defined(CONFIG_BLUETOOTH_RESET_PA7)
679 #if defined(CONFIG_BLUETOOTH_RESET_ACTIVE_HIGH)
685 move.b $r0,[port_pa_data_shadow]
686 move.b $r0,[R_PORT_PA_DATA]
688 move.b CONFIG_ETRAX_DEF_R_PORT_PB_CONFIG,$r0
689 move.b $r0,[port_pb_config_shadow]
690 move.b $r0,[R_PORT_PB_CONFIG]
691 move.b CONFIG_ETRAX_DEF_R_PORT_PB_DIR,$r0
692 #if defined(CONFIG_BLUETOOTH) && defined(CONFIG_BLUETOOTH_RESET_PB5)
693 or.b IO_STATE (R_PORT_PB_DIR, dir5, output),$r0
695 move.b $r0,[port_pb_dir_shadow]
696 move.b $r0,[R_PORT_PB_DIR]
697 move.b CONFIG_ETRAX_DEF_R_PORT_PB_DATA,$r0
698 #if defined(CONFIG_BLUETOOTH) && defined(CONFIG_BLUETOOTH_RESET_PB5)
699 #if defined(CONFIG_BLUETOOTH_RESET_ACTIVE_HIGH)
705 move.b $r0,[port_pb_data_shadow]
706 move.b $r0,[R_PORT_PB_DATA]
709 move.d $r0,[port_pb_i2c_shadow]
710 move.d $r0, [R_PORT_PB_I2C]
713 #if defined(CONFIG_BLUETOOTH) && defined(CONFIG_BLUETOOTH_RESET_G10)
714 #if defined(CONFIG_BLUETOOTH_RESET_ACTIVE_HIGH)
720 #if defined(CONFIG_BLUETOOTH) && defined(CONFIG_BLUETOOTH_RESET_G11)
721 #if defined(CONFIG_BLUETOOTH_RESET_ACTIVE_HIGH)
727 move.d $r0,[port_g_data_shadow]
728 move.d $r0,[R_PORT_G_DATA]
730 ;; setup the serial port 0 at 115200 baud for debug purposes
732 moveq IO_STATE (R_SERIAL0_XOFF, tx_stop, enable) \
733 | IO_STATE (R_SERIAL0_XOFF, auto_xoff, disable) \
734 | IO_FIELD (R_SERIAL0_XOFF, xoff_char, 0),$r0
735 move.d $r0,[R_SERIAL0_XOFF]
737 ; 115.2kbaud for both transmit and receive
738 move.b IO_STATE (R_SERIAL0_BAUD, tr_baud, c115k2Hz) \
739 | IO_STATE (R_SERIAL0_BAUD, rec_baud, c115k2Hz),$r0
740 move.b $r0,[R_SERIAL0_BAUD]
742 ; Set up and enable the serial0 receiver.
743 move.b IO_STATE (R_SERIAL0_REC_CTRL, dma_err, stop) \
744 | IO_STATE (R_SERIAL0_REC_CTRL, rec_enable, enable) \
745 | IO_STATE (R_SERIAL0_REC_CTRL, rts_, active) \
746 | IO_STATE (R_SERIAL0_REC_CTRL, sampling, middle) \
747 | IO_STATE (R_SERIAL0_REC_CTRL, rec_stick_par, normal) \
748 | IO_STATE (R_SERIAL0_REC_CTRL, rec_par, even) \
749 | IO_STATE (R_SERIAL0_REC_CTRL, rec_par_en, disable) \
750 | IO_STATE (R_SERIAL0_REC_CTRL, rec_bitnr, rec_8bit),$r0
751 move.b $r0,[R_SERIAL0_REC_CTRL]
753 ; Set up and enable the serial0 transmitter.
754 move.b IO_FIELD (R_SERIAL0_TR_CTRL, txd, 0) \
755 | IO_STATE (R_SERIAL0_TR_CTRL, tr_enable, enable) \
756 | IO_STATE (R_SERIAL0_TR_CTRL, auto_cts, disabled) \
757 | IO_STATE (R_SERIAL0_TR_CTRL, stop_bits, one_bit) \
758 | IO_STATE (R_SERIAL0_TR_CTRL, tr_stick_par, normal) \
759 | IO_STATE (R_SERIAL0_TR_CTRL, tr_par, even) \
760 | IO_STATE (R_SERIAL0_TR_CTRL, tr_par_en, disable) \
761 | IO_STATE (R_SERIAL0_TR_CTRL, tr_bitnr, tr_8bit),$r0
762 move.b $r0,[R_SERIAL0_TR_CTRL]
764 ;; setup the serial port 1 at 115200 baud for debug purposes
766 moveq IO_STATE (R_SERIAL1_XOFF, tx_stop, enable) \
767 | IO_STATE (R_SERIAL1_XOFF, auto_xoff, disable) \
768 | IO_FIELD (R_SERIAL1_XOFF, xoff_char, 0),$r0
769 move.d $r0,[R_SERIAL1_XOFF]
771 ; 115.2kbaud for both transmit and receive
772 move.b IO_STATE (R_SERIAL1_BAUD, tr_baud, c115k2Hz) \
773 | IO_STATE (R_SERIAL1_BAUD, rec_baud, c115k2Hz),$r0
774 move.b $r0,[R_SERIAL1_BAUD]
776 ; Set up and enable the serial1 receiver.
777 move.b IO_STATE (R_SERIAL1_REC_CTRL, dma_err, stop) \
778 | IO_STATE (R_SERIAL1_REC_CTRL, rec_enable, enable) \
779 | IO_STATE (R_SERIAL1_REC_CTRL, rts_, active) \
780 | IO_STATE (R_SERIAL1_REC_CTRL, sampling, middle) \
781 | IO_STATE (R_SERIAL1_REC_CTRL, rec_stick_par, normal) \
782 | IO_STATE (R_SERIAL1_REC_CTRL, rec_par, even) \
783 | IO_STATE (R_SERIAL1_REC_CTRL, rec_par_en, disable) \
784 | IO_STATE (R_SERIAL1_REC_CTRL, rec_bitnr, rec_8bit),$r0
785 move.b $r0,[R_SERIAL1_REC_CTRL]
787 ; Set up and enable the serial1 transmitter.
788 move.b IO_FIELD (R_SERIAL1_TR_CTRL, txd, 0) \
789 | IO_STATE (R_SERIAL1_TR_CTRL, tr_enable, enable) \
790 | IO_STATE (R_SERIAL1_TR_CTRL, auto_cts, disabled) \
791 | IO_STATE (R_SERIAL1_TR_CTRL, stop_bits, one_bit) \
792 | IO_STATE (R_SERIAL1_TR_CTRL, tr_stick_par, normal) \
793 | IO_STATE (R_SERIAL1_TR_CTRL, tr_par, even) \
794 | IO_STATE (R_SERIAL1_TR_CTRL, tr_par_en, disable) \
795 | IO_STATE (R_SERIAL1_TR_CTRL, tr_bitnr, tr_8bit),$r0
796 move.b $r0,[R_SERIAL1_TR_CTRL]
799 #ifdef CONFIG_ETRAX_SERIAL_PORT3
800 ;; setup the serial port 3 at 115200 baud for debug purposes
802 moveq IO_STATE (R_SERIAL3_XOFF, tx_stop, enable) \
803 | IO_STATE (R_SERIAL3_XOFF, auto_xoff, disable) \
804 | IO_FIELD (R_SERIAL3_XOFF, xoff_char, 0),$r0
805 move.d $r0,[R_SERIAL3_XOFF]
807 ; 115.2kbaud for both transmit and receive
808 move.b IO_STATE (R_SERIAL3_BAUD, tr_baud, c115k2Hz) \
809 | IO_STATE (R_SERIAL3_BAUD, rec_baud, c115k2Hz),$r0
810 move.b $r0,[R_SERIAL3_BAUD]
812 ; Set up and enable the serial3 receiver.
813 move.b IO_STATE (R_SERIAL3_REC_CTRL, dma_err, stop) \
814 | IO_STATE (R_SERIAL3_REC_CTRL, rec_enable, enable) \
815 | IO_STATE (R_SERIAL3_REC_CTRL, rts_, active) \
816 | IO_STATE (R_SERIAL3_REC_CTRL, sampling, middle) \
817 | IO_STATE (R_SERIAL3_REC_CTRL, rec_stick_par, normal) \
818 | IO_STATE (R_SERIAL3_REC_CTRL, rec_par, even) \
819 | IO_STATE (R_SERIAL3_REC_CTRL, rec_par_en, disable) \
820 | IO_STATE (R_SERIAL3_REC_CTRL, rec_bitnr, rec_8bit),$r0
821 move.b $r0,[R_SERIAL3_REC_CTRL]
823 ; Set up and enable the serial3 transmitter.
824 move.b IO_FIELD (R_SERIAL3_TR_CTRL, txd, 0) \
825 | IO_STATE (R_SERIAL3_TR_CTRL, tr_enable, enable) \
826 | IO_STATE (R_SERIAL3_TR_CTRL, auto_cts, disabled) \
827 | IO_STATE (R_SERIAL3_TR_CTRL, stop_bits, one_bit) \
828 | IO_STATE (R_SERIAL3_TR_CTRL, tr_stick_par, normal) \
829 | IO_STATE (R_SERIAL3_TR_CTRL, tr_par, even) \
830 | IO_STATE (R_SERIAL3_TR_CTRL, tr_par_en, disable) \
831 | IO_STATE (R_SERIAL3_TR_CTRL, tr_bitnr, tr_8bit),$r0
832 move.b $r0,[R_SERIAL3_TR_CTRL]
835 #endif /* CONFIG_SVINTO_SIM */
837 jump start_kernel ; jump into the C-function start_kernel in init/main.c
849 ;; put some special pages at the beginning of the kernel aligned
850 ;; to page boundaries - the kernel cannot start until after this
852 #ifdef CONFIG_CRIS_LOW_MAP
853 swapper_pg_dir = 0x60002000
855 swapper_pg_dir = 0xc0002000
858 .section ".init.data", "aw"
859 #include "../lib/hw_settings.S"