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1/*
2 * Head of the kernel - alter with care
3 *
4 * Copyright (C) 2000, 2001 Axis Communications AB
5 *
6 * Authors: Bjorn Wesen (bjornw@axis.com)
7 *
8 */
9
10#define ASSEMBLER_MACROS_ONLY
11/* The IO_* macros use the ## token concatenation operator, so
12 -traditional must not be used when assembling this file. */
13#include <arch/sv_addr_ag.h>
14
15#define CRAMFS_MAGIC 0x28cd3d45
16#define RAM_INIT_MAGIC 0x56902387
17#define COMMAND_LINE_MAGIC 0x87109563
18
19#define START_ETHERNET_CLOCK IO_STATE(R_NETWORK_GEN_CONFIG, enable, on) |\
20 IO_STATE(R_NETWORK_GEN_CONFIG, phy, mii_clk)
21
22 ;; exported symbols
23
24 .globl etrax_irv
25 .globl romfs_start
26 .globl romfs_length
27 .globl romfs_in_flash
28 .globl swapper_pg_dir
29
30 .text
31
32 ;; This is the entry point of the kernel. We are in supervisor mode.
33 ;; 0x00000000 if Flash, 0x40004000 if DRAM
34 ;; since etrax actually starts at address 2 when booting from flash, we
35 ;; put a nop (2 bytes) here first so we dont accidentally skip the di
36 ;;
37 ;; NOTICE! The registers r8 and r9 are used as parameters carrying
38 ;; information from the decompressor (if the kernel was compressed).
39 ;; They should not be used in the code below until read.
40
41 nop
42 di
43
44 ;; First setup the kseg_c mapping from where the kernel is linked
45 ;; to 0x40000000 (where the actual DRAM resides) otherwise
46 ;; we cannot do very much! See arch/cris/README.mm
47 ;;
48 ;; Notice that since we're potentially running at 0x00 or 0x40 right now,
49 ;; we will get a fault as soon as we enable the MMU if we dont
50 ;; temporarily map those segments linearily.
51 ;;
52 ;; Due to a bug in Etrax-100 LX version 1 we need to map the memory
53 ;; slightly different. The bug is that you can't remap bit 31 of
54 ;; an address. Though we can check the version register for
55 ;; whether the bug is present, some constants would then have to
56 ;; be variables, so we don't. The drawback is that you can "only" map
57 ;; 1G per process with CONFIG_CRIS_LOW_MAP.
58
59#ifdef CONFIG_CRIS_LOW_MAP
60 ; kseg mappings, temporary map of 0xc0->0x40
61 move.d IO_FIELD (R_MMU_KBASE_HI, base_c, 4) \
62 | IO_FIELD (R_MMU_KBASE_HI, base_b, 0xb) \
63 | IO_FIELD (R_MMU_KBASE_HI, base_9, 9) \
64 | IO_FIELD (R_MMU_KBASE_HI, base_8, 8), $r0
65 move.d $r0, [R_MMU_KBASE_HI]
66
67 ; temporary map of 0x40->0x40 and 0x60->0x40
68 move.d IO_FIELD (R_MMU_KBASE_LO, base_6, 4) \
69 | IO_FIELD (R_MMU_KBASE_LO, base_4, 4), $r0
70 move.d $r0, [R_MMU_KBASE_LO]
71
72 ; mmu enable, segs e,c,b,a,6,5,4,0 segment mapped
73 move.d IO_STATE (R_MMU_CONFIG, mmu_enable, enable) \
74 | IO_STATE (R_MMU_CONFIG, inv_excp, enable) \
75 | IO_STATE (R_MMU_CONFIG, acc_excp, enable) \
76 | IO_STATE (R_MMU_CONFIG, we_excp, enable) \
77 | IO_STATE (R_MMU_CONFIG, seg_f, page) \
78 | IO_STATE (R_MMU_CONFIG, seg_e, seg) \
79 | IO_STATE (R_MMU_CONFIG, seg_d, page) \
80 | IO_STATE (R_MMU_CONFIG, seg_c, seg) \
81 | IO_STATE (R_MMU_CONFIG, seg_b, seg) \
82 | IO_STATE (R_MMU_CONFIG, seg_a, seg) \
83 | IO_STATE (R_MMU_CONFIG, seg_9, page) \
84 | IO_STATE (R_MMU_CONFIG, seg_8, page) \
85 | IO_STATE (R_MMU_CONFIG, seg_7, page) \
86 | IO_STATE (R_MMU_CONFIG, seg_6, seg) \
87 | IO_STATE (R_MMU_CONFIG, seg_5, seg) \
88 | IO_STATE (R_MMU_CONFIG, seg_4, seg) \
89 | IO_STATE (R_MMU_CONFIG, seg_3, page) \
90 | IO_STATE (R_MMU_CONFIG, seg_2, page) \
91 | IO_STATE (R_MMU_CONFIG, seg_1, page) \
92 | IO_STATE (R_MMU_CONFIG, seg_0, seg), $r0
93 move.d $r0, [R_MMU_CONFIG]
94#else
95 ; kseg mappings
96 move.d IO_FIELD (R_MMU_KBASE_HI, base_e, 8) \
97 | IO_FIELD (R_MMU_KBASE_HI, base_c, 4) \
98 | IO_FIELD (R_MMU_KBASE_HI, base_b, 0xb), $r0
99 move.d $r0, [R_MMU_KBASE_HI]
100
101 ; temporary map of 0x40->0x40 and 0x00->0x00
102 move.d IO_FIELD (R_MMU_KBASE_LO, base_4, 4), $r0
103 move.d $r0, [R_MMU_KBASE_LO]
104
105 ; mmu enable, segs f,e,c,b,4,0 segment mapped
106 move.d IO_STATE (R_MMU_CONFIG, mmu_enable, enable) \
107 | IO_STATE (R_MMU_CONFIG, inv_excp, enable) \
108 | IO_STATE (R_MMU_CONFIG, acc_excp, enable) \
109 | IO_STATE (R_MMU_CONFIG, we_excp, enable) \
110 | IO_STATE (R_MMU_CONFIG, seg_f, seg) \
111 | IO_STATE (R_MMU_CONFIG, seg_e, seg) \
112 | IO_STATE (R_MMU_CONFIG, seg_d, page) \
113 | IO_STATE (R_MMU_CONFIG, seg_c, seg) \
114 | IO_STATE (R_MMU_CONFIG, seg_b, seg) \
115 | IO_STATE (R_MMU_CONFIG, seg_a, page) \
116 | IO_STATE (R_MMU_CONFIG, seg_9, page) \
117 | IO_STATE (R_MMU_CONFIG, seg_8, page) \
118 | IO_STATE (R_MMU_CONFIG, seg_7, page) \
119 | IO_STATE (R_MMU_CONFIG, seg_6, page) \
120 | IO_STATE (R_MMU_CONFIG, seg_5, page) \
121 | IO_STATE (R_MMU_CONFIG, seg_4, seg) \
122 | IO_STATE (R_MMU_CONFIG, seg_3, page) \
123 | IO_STATE (R_MMU_CONFIG, seg_2, page) \
124 | IO_STATE (R_MMU_CONFIG, seg_1, page) \
125 | IO_STATE (R_MMU_CONFIG, seg_0, seg), $r0
126 move.d $r0, [R_MMU_CONFIG]
127#endif
128
129 ;; Now we need to sort out the segments and their locations in RAM or
130 ;; Flash. The image in the Flash (or in DRAM) consists of 3 pieces:
131 ;; 1) kernel text, 2) kernel data, 3) ROM filesystem image
132 ;; But the linker has linked the kernel to expect this layout in
133 ;; DRAM memory:
134 ;; 1) kernel text, 2) kernel data, 3) kernel BSS
135 ;; (the location of the ROM filesystem is determined by the krom driver)
136 ;; If we boot this from Flash, we want to keep the ROM filesystem in
137 ;; the flash, we want to copy the text and need to copy the data to DRAM.
138 ;; But if we boot from DRAM, we need to move the ROMFS image
139 ;; from its position after kernel data, to after kernel BSS, BEFORE the
140 ;; kernel starts using the BSS area (since its "overlayed" with the ROMFS)
141 ;;
142 ;; In both cases, we start in un-cached mode, and need to jump into a
143 ;; cached PC after we're done fiddling around with the segments.
144 ;;
145 ;; arch/etrax100/etrax100.ld sets some symbols that define the start
146 ;; and end of each segment.
147
148 ;; Check if we start from DRAM or FLASH by testing PC
149
150 move.d $pc,$r0
151 and.d 0x7fffffff,$r0 ; get rid of the non-cache bit
152 cmp.d 0x10000,$r0 ; arbitrary... just something above this code
153 blo _inflash0
154 nop
155
156 jump _inram ; enter cached ram
157
158 ;; Jumpgate for branches.
159_inflash0:
160 jump _inflash
161
162 ;; Put this in a suitable section where we can reclaim storage
163 ;; after init.
164 .section ".init.text", "ax"
165_inflash:
166#ifdef CONFIG_ETRAX_ETHERNET
167 ;; Start MII clock to make sure it is running when tranceiver is reset
168 move.d START_ETHERNET_CLOCK, $r0
169 move.d $r0, [R_NETWORK_GEN_CONFIG]
170#endif
171
172 ;; Set up waitstates etc according to kernel configuration.
173#ifndef CONFIG_SVINTO_SIM
174 move.d CONFIG_ETRAX_DEF_R_WAITSTATES, $r0
175 move.d $r0, [R_WAITSTATES]
176
177 move.d CONFIG_ETRAX_DEF_R_BUS_CONFIG, $r0
178 move.d $r0, [R_BUS_CONFIG]
179#endif
180
181 ;; We need to initialze DRAM registers before we start using the DRAM
182
183 cmp.d RAM_INIT_MAGIC, $r8 ; Already initialized?
184 beq _dram_init_finished
185 nop
186
187#include "../lib/dram_init.S"
188
189_dram_init_finished:
190 ;; Copy text+data to DRAM
191 ;; This is fragile - the calculation of r4 as the image size depends
192 ;; on that the labels below actually are the first and last positions
193 ;; in the linker-script.
194 ;;
195 ;; Then the locating of the cramfs image depends on the aforementioned
196 ;; image being located in the flash at 0. This is most often not true,
197 ;; thus the following does not work (normally there is a rescue-block
198 ;; between the physical start of the flash and the flash-image start,
199 ;; and when run with compression, the kernel is actually unpacked to
200 ;; DRAM and we never get here in the first place :))
201
202 moveq 0, $r0 ; source
203 move.d text_start, $r1 ; destination
204 move.d __vmlinux_end, $r2 ; end destination
205 move.d $r2, $r4
206 sub.d $r1, $r4 ; r4=__vmlinux_end in flash, used below
2071: move.w [$r0+], $r3
208 move.w $r3, [$r1+]
209 cmp.d $r2, $r1
210 blo 1b
211 nop
212
213 ;; We keep the cramfs in the flash.
214 ;; There might be none, but that does not matter because
215 ;; we don't do anything than read some bytes here.
216
217 moveq 0, $r0
218 move.d $r0, [romfs_length] ; default if there is no cramfs
219
220 move.d [$r4], $r0 ; cramfs_super.magic
221 cmp.d CRAMFS_MAGIC, $r0
222 bne 1f
223 nop
224 move.d [$r4 + 4], $r0 ; cramfs_super.size
225 move.d $r0, [romfs_length]
226#ifdef CONFIG_CRIS_LOW_MAP
227 add.d 0x50000000, $r4 ; add flash start in virtual memory (cached)
228#else
229 add.d 0xf0000000, $r4 ; add flash start in virtual memory (cached)
230#endif
231 move.d $r4, [romfs_start]
2321:
233 moveq 1, $r0
234 move.d $r0, [romfs_in_flash]
235
236 jump _start_it ; enter code, cached this time
237
238_inram:
239 ;; Move the ROM fs to after BSS end. This assumes that the cramfs
240 ;; second longword contains the length of the cramfs
241
242 moveq 0, $r0
243 move.d $r0, [romfs_length] ; default if there is no cramfs
244
245 ;; The kernel could have been unpacked to DRAM by the loader, but
246 ;; the cramfs image could still be in the Flash directly after the
247 ;; compressed kernel image. The loader passes the address of the
248 ;; byte succeeding the last compressed byte in the flash in the
249 ;; register r9 when starting the kernel. Check if r9 points to a
250 ;; decent cramfs image!
251 ;; (Notice that if this is not booted from the loader, r9 will be
252 ;; garbage but we do sanity checks on it, the chance that it points
253 ;; to a cramfs magic is small.. )
254
255 cmp.d 0x0ffffff8, $r9
256 bhs _no_romfs_in_flash ; r9 points outside the flash area
257 nop
258 move.d [$r9], $r0 ; cramfs_super.magic
259 cmp.d CRAMFS_MAGIC, $r0
260 bne _no_romfs_in_flash
261 nop
262 move.d [$r9+4], $r0 ; cramfs_super.length
263 move.d $r0, [romfs_length]
264#ifdef CONFIG_CRIS_LOW_MAP
265 add.d 0x50000000, $r9 ; add flash start in virtual memory (cached)
266#else
267 add.d 0xf0000000, $r9 ; add flash start in virtual memory (cached)
268#endif
269 move.d $r9, [romfs_start]
270
271 moveq 1, $r0
272 move.d $r0, [romfs_in_flash]
273
274 jump _start_it ; enter code, cached this time
275
276_no_romfs_in_flash:
277
278 ;; Check if there is a cramfs (magic value).
279 ;; Notice that we check for cramfs magic value - which is
280 ;; the "rom fs" we'll possibly use in 2.4 if not JFFS (which does
281 ;; not need this mechanism anyway)
282
283 move.d __init_end, $r0; the image will be after the end of init
284 move.d [$r0], $r1 ; cramfs assumes same endian on host/target
285 cmp.d CRAMFS_MAGIC, $r1; magic value in cramfs superblock
286 bne 2f
287 nop
288
289 ;; Ok. What is its size ?
290
291 move.d [$r0 + 4], $r2 ; cramfs_super.size (again, no need to swapwb)
292
293 ;; We want to copy it to the end of the BSS
294
295 move.d _end, $r1
296
297 ;; Remember values so cramfs and setup can find this info
298
299 move.d $r1, [romfs_start] ; new romfs location
300 move.d $r2, [romfs_length]
301
302 ;; We need to copy it backwards, since they can be overlapping
303
304 add.d $r2, $r0
305 add.d $r2, $r1
306
307 ;; Go ahead. Make my loop.
308
309 lsrq 1, $r2 ; size is in bytes, we copy words
310
3111: move.w [$r0=$r0-2],$r3
312 move.w $r3,[$r1=$r1-2]
313 subq 1, $r2
314 bne 1b
315 nop
316
3172:
318 ;; Dont worry that the BSS is tainted. It will be cleared later.
319
320 moveq 0, $r0
321 move.d $r0, [romfs_in_flash]
322
323 jump _start_it ; better skip the additional cramfs check below
324
325_start_it:
326
327 ;; Check if kernel command line is supplied
328 cmp.d COMMAND_LINE_MAGIC, $r10
329 bne no_command_line
330 nop
331
332 move.d 256, $r13
333 move.d cris_command_line, $r10
334 or.d 0x80000000, $r11 ; Make it virtual
3351:
336 move.b [$r11+], $r12
337 move.b $r12, [$r10+]
338 subq 1, $r13
339 bne 1b
340 nop
341
342no_command_line:
343
344 ;; the kernel stack is overlayed with the task structure for each
345 ;; task. thus the initial kernel stack is in the same page as the
346 ;; init_task (but starts in the top of the page, size 8192)
347 move.d init_thread_union + 8192, $sp
348 move.d ibr_start,$r0 ; this symbol is set by the linker script
349 move $r0,$ibr
350 move.d $r0,[etrax_irv] ; set the interrupt base register and pointer
351
352 ;; Clear BSS region, from _bss_start to _end
353
354 move.d __bss_start, $r0
355 move.d _end, $r1
3561: clear.d [$r0+]
357 cmp.d $r1, $r0
358 blo 1b
359 nop
360
361#ifdef CONFIG_BLK_DEV_ETRAXIDE
362 ;; disable ATA before enabling it in genconfig below
363 moveq 0,$r0
364 move.d $r0,[R_ATA_CTRL_DATA]
365 move.d $r0,[R_ATA_TRANSFER_CNT]
366 move.d $r0,[R_ATA_CONFIG]
367#if 0
368 move.d R_PORT_G_DATA, $r1
369 move.d $r0, [$r1]; assert ATA bus-reset
370 nop
371 nop
372 nop
373 nop
374 nop
375 nop
376 move.d 0x08000000,$r0
377 move.d $r0,[$r1]
378#endif
379#endif
380
381#ifdef CONFIG_JULIETTE
382 ;; configure external DMA channel 0 before enabling it in genconfig
383
384 moveq 0,$r0
385 move.d $r0,[R_EXT_DMA_0_ADDR]
386 ; cnt enable, word size, output, stop, size 0
387 move.d IO_STATE (R_EXT_DMA_0_CMD, cnt, enable) \
388 | IO_STATE (R_EXT_DMA_0_CMD, rqpol, ahigh) \
389 | IO_STATE (R_EXT_DMA_0_CMD, apol, ahigh) \
390 | IO_STATE (R_EXT_DMA_0_CMD, rq_ack, burst) \
391 | IO_STATE (R_EXT_DMA_0_CMD, wid, word) \
392 | IO_STATE (R_EXT_DMA_0_CMD, dir, output) \
393 | IO_STATE (R_EXT_DMA_0_CMD, run, stop) \
394 | IO_FIELD (R_EXT_DMA_0_CMD, trf_count, 0),$r0
395 move.d $r0,[R_EXT_DMA_0_CMD]
396
397 ;; reset dma4 and wait for completion
398
399 moveq IO_STATE (R_DMA_CH4_CMD, cmd, reset),$r0
400 move.b $r0,[R_DMA_CH4_CMD]
4011: move.b [R_DMA_CH4_CMD],$r0
402 and.b IO_MASK (R_DMA_CH4_CMD, cmd),$r0
403 cmp.b IO_STATE (R_DMA_CH4_CMD, cmd, reset),$r0
404 beq 1b
405 nop
406
407 ;; reset dma5 and wait for completion
408
409 moveq IO_STATE (R_DMA_CH5_CMD, cmd, reset),$r0
410 move.b $r0,[R_DMA_CH5_CMD]
4111: move.b [R_DMA_CH5_CMD],$r0
412 and.b IO_MASK (R_DMA_CH5_CMD, cmd),$r0
413 cmp.b IO_STATE (R_DMA_CH5_CMD, cmd, reset),$r0
414 beq 1b
415 nop
416#endif
417
418 ;; Etrax product HW genconfig setup
419
420 moveq 0,$r0
421
422 ;; Select or disable serial port 2
423#ifdef CONFIG_ETRAX_SERIAL_PORT2
424 or.d IO_STATE (R_GEN_CONFIG, ser2, select),$r0
425#else
426 or.d IO_STATE (R_GEN_CONFIG, ser2, disable),$r0
427#endif
428
429 ;; Init interfaces (disable them).
430 or.d IO_STATE (R_GEN_CONFIG, scsi0, disable) \
431 | IO_STATE (R_GEN_CONFIG, ata, disable) \
432 | IO_STATE (R_GEN_CONFIG, par0, disable) \
433 | IO_STATE (R_GEN_CONFIG, mio, disable) \
434 | IO_STATE (R_GEN_CONFIG, scsi1, disable) \
435 | IO_STATE (R_GEN_CONFIG, scsi0w, disable) \
436 | IO_STATE (R_GEN_CONFIG, par1, disable) \
437 | IO_STATE (R_GEN_CONFIG, ser3, disable) \
438 | IO_STATE (R_GEN_CONFIG, mio_w, disable) \
439 | IO_STATE (R_GEN_CONFIG, usb1, disable) \
440 | IO_STATE (R_GEN_CONFIG, usb2, disable) \
441 | IO_STATE (R_GEN_CONFIG, par_w, disable),$r0
442
443 ;; Init DMA channel muxing (set to unused clients).
444 or.d IO_STATE (R_GEN_CONFIG, dma2, ata) \
445 | IO_STATE (R_GEN_CONFIG, dma3, ata) \
446 | IO_STATE (R_GEN_CONFIG, dma4, scsi1) \
447 | IO_STATE (R_GEN_CONFIG, dma5, scsi1) \
448 | IO_STATE (R_GEN_CONFIG, dma6, unused) \
449 | IO_STATE (R_GEN_CONFIG, dma7, unused) \
450 | IO_STATE (R_GEN_CONFIG, dma8, usb) \
451 | IO_STATE (R_GEN_CONFIG, dma9, usb),$r0
452
453
454#if defined(CONFIG_ETRAX_DEF_R_PORT_G0_DIR_OUT)
455 or.d IO_STATE (R_GEN_CONFIG, g0dir, out),$r0
456#endif
457
458#if defined(CONFIG_ETRAX_DEF_R_PORT_G8_15_DIR_OUT)
459 or.d IO_STATE (R_GEN_CONFIG, g8_15dir, out),$r0
460#endif
461#if defined(CONFIG_ETRAX_DEF_R_PORT_G16_23_DIR_OUT)
462 or.d IO_STATE (R_GEN_CONFIG, g16_23dir, out),$r0
463#endif
464
465#if defined(CONFIG_ETRAX_DEF_R_PORT_G24_DIR_OUT)
466 or.d IO_STATE (R_GEN_CONFIG, g24dir, out),$r0
467#endif
468
469 move.d $r0,[genconfig_shadow] ; init a shadow register of R_GEN_CONFIG
470
471#ifndef CONFIG_SVINTO_SIM
472 move.d $r0,[R_GEN_CONFIG]
473
474#if 0
475 moveq 4,$r0
476 move.b $r0,[R_DMA_CH6_CMD] ; reset (ser0 dma out)
477 move.b $r0,[R_DMA_CH7_CMD] ; reset (ser0 dma in)
4781: move.b [R_DMA_CH6_CMD],$r0 ; wait for reset cycle to finish
479 and.b 7,$r0
480 cmp.b 4,$r0
481 beq 1b
482 nop
4831: move.b [R_DMA_CH7_CMD],$r0 ; wait for reset cycle to finish
484 and.b 7,$r0
485 cmp.b 4,$r0
486 beq 1b
487 nop
488#endif
489
490 moveq IO_STATE (R_DMA_CH8_CMD, cmd, reset),$r0
491 move.b $r0,[R_DMA_CH8_CMD] ; reset (ser1 dma out)
492 move.b $r0,[R_DMA_CH9_CMD] ; reset (ser1 dma in)
4931: move.b [R_DMA_CH8_CMD],$r0 ; wait for reset cycle to finish
494 andq IO_MASK (R_DMA_CH8_CMD, cmd),$r0
495 cmpq IO_STATE (R_DMA_CH8_CMD, cmd, reset),$r0
496 beq 1b
497 nop
4981: move.b [R_DMA_CH9_CMD],$r0 ; wait for reset cycle to finish
499 andq IO_MASK (R_DMA_CH9_CMD, cmd),$r0
500 cmpq IO_STATE (R_DMA_CH9_CMD, cmd, reset),$r0
501 beq 1b
502 nop
503
504 ;; setup port PA and PB default initial directions and data
505 ;; including their shadow registers
506
507 move.b CONFIG_ETRAX_DEF_R_PORT_PA_DIR,$r0
508#if defined(CONFIG_BLUETOOTH) && defined(CONFIG_BLUETOOTH_RESET_PA7)
509 or.b IO_STATE (R_PORT_PA_DIR, dir7, output),$r0
510#endif
511 move.b $r0,[port_pa_dir_shadow]
512 move.b $r0,[R_PORT_PA_DIR]
513 move.b CONFIG_ETRAX_DEF_R_PORT_PA_DATA,$r0
514#if defined(CONFIG_BLUETOOTH) && defined(CONFIG_BLUETOOTH_RESET_PA7)
515#if defined(CONFIG_BLUETOOTH_RESET_ACTIVE_HIGH)
516 and.b ~(1 << 7),$r0
517#else
518 or.b (1 << 7),$r0
519#endif
520#endif
521 move.b $r0,[port_pa_data_shadow]
522 move.b $r0,[R_PORT_PA_DATA]
523
524 move.b CONFIG_ETRAX_DEF_R_PORT_PB_CONFIG,$r0
525 move.b $r0,[port_pb_config_shadow]
526 move.b $r0,[R_PORT_PB_CONFIG]
527 move.b CONFIG_ETRAX_DEF_R_PORT_PB_DIR,$r0
528#if defined(CONFIG_BLUETOOTH) && defined(CONFIG_BLUETOOTH_RESET_PB5)
529 or.b IO_STATE (R_PORT_PB_DIR, dir5, output),$r0
530#endif
531 move.b $r0,[port_pb_dir_shadow]
532 move.b $r0,[R_PORT_PB_DIR]
533 move.b CONFIG_ETRAX_DEF_R_PORT_PB_DATA,$r0
534#if defined(CONFIG_BLUETOOTH) && defined(CONFIG_BLUETOOTH_RESET_PB5)
535#if defined(CONFIG_BLUETOOTH_RESET_ACTIVE_HIGH)
536 and.b ~(1 << 5),$r0
537#else
538 or.b (1 << 5),$r0
539#endif
540#endif
541 move.b $r0,[port_pb_data_shadow]
542 move.b $r0,[R_PORT_PB_DATA]
543
544 moveq 0, $r0
545 move.d $r0,[port_pb_i2c_shadow]
546 move.d $r0, [R_PORT_PB_I2C]
547
548 moveq 0,$r0
549#if defined(CONFIG_BLUETOOTH) && defined(CONFIG_BLUETOOTH_RESET_G10)
550#if defined(CONFIG_BLUETOOTH_RESET_ACTIVE_HIGH)
551 and.d ~(1 << 10),$r0
552#else
553 or.d (1 << 10),$r0
554#endif
555#endif
556#if defined(CONFIG_BLUETOOTH) && defined(CONFIG_BLUETOOTH_RESET_G11)
557#if defined(CONFIG_BLUETOOTH_RESET_ACTIVE_HIGH)
558 and.d ~(1 << 11),$r0
559#else
560 or.d (1 << 11),$r0
561#endif
562#endif
563 move.d $r0,[port_g_data_shadow]
564 move.d $r0,[R_PORT_G_DATA]
565
566 ;; setup the serial port 0 at 115200 baud for debug purposes
567
568 moveq IO_STATE (R_SERIAL0_XOFF, tx_stop, enable) \
569 | IO_STATE (R_SERIAL0_XOFF, auto_xoff, disable) \
570 | IO_FIELD (R_SERIAL0_XOFF, xoff_char, 0),$r0
571 move.d $r0,[R_SERIAL0_XOFF]
572
573 ; 115.2kbaud for both transmit and receive
574 move.b IO_STATE (R_SERIAL0_BAUD, tr_baud, c115k2Hz) \
575 | IO_STATE (R_SERIAL0_BAUD, rec_baud, c115k2Hz),$r0
576 move.b $r0,[R_SERIAL0_BAUD]
577
578 ; Set up and enable the serial0 receiver.
579 move.b IO_STATE (R_SERIAL0_REC_CTRL, dma_err, stop) \
580 | IO_STATE (R_SERIAL0_REC_CTRL, rec_enable, enable) \
581 | IO_STATE (R_SERIAL0_REC_CTRL, rts_, active) \
582 | IO_STATE (R_SERIAL0_REC_CTRL, sampling, middle) \
583 | IO_STATE (R_SERIAL0_REC_CTRL, rec_stick_par, normal) \
584 | IO_STATE (R_SERIAL0_REC_CTRL, rec_par, even) \
585 | IO_STATE (R_SERIAL0_REC_CTRL, rec_par_en, disable) \
586 | IO_STATE (R_SERIAL0_REC_CTRL, rec_bitnr, rec_8bit),$r0
587 move.b $r0,[R_SERIAL0_REC_CTRL]
588
589 ; Set up and enable the serial0 transmitter.
590 move.b IO_FIELD (R_SERIAL0_TR_CTRL, txd, 0) \
591 | IO_STATE (R_SERIAL0_TR_CTRL, tr_enable, enable) \
592 | IO_STATE (R_SERIAL0_TR_CTRL, auto_cts, disabled) \
593 | IO_STATE (R_SERIAL0_TR_CTRL, stop_bits, one_bit) \
594 | IO_STATE (R_SERIAL0_TR_CTRL, tr_stick_par, normal) \
595 | IO_STATE (R_SERIAL0_TR_CTRL, tr_par, even) \
596 | IO_STATE (R_SERIAL0_TR_CTRL, tr_par_en, disable) \
597 | IO_STATE (R_SERIAL0_TR_CTRL, tr_bitnr, tr_8bit),$r0
598 move.b $r0,[R_SERIAL0_TR_CTRL]
599
600 ;; setup the serial port 1 at 115200 baud for debug purposes
601
602 moveq IO_STATE (R_SERIAL1_XOFF, tx_stop, enable) \
603 | IO_STATE (R_SERIAL1_XOFF, auto_xoff, disable) \
604 | IO_FIELD (R_SERIAL1_XOFF, xoff_char, 0),$r0
605 move.d $r0,[R_SERIAL1_XOFF]
606
607 ; 115.2kbaud for both transmit and receive
608 move.b IO_STATE (R_SERIAL1_BAUD, tr_baud, c115k2Hz) \
609 | IO_STATE (R_SERIAL1_BAUD, rec_baud, c115k2Hz),$r0
610 move.b $r0,[R_SERIAL1_BAUD]
611
612 ; Set up and enable the serial1 receiver.
613 move.b IO_STATE (R_SERIAL1_REC_CTRL, dma_err, stop) \
614 | IO_STATE (R_SERIAL1_REC_CTRL, rec_enable, enable) \
615 | IO_STATE (R_SERIAL1_REC_CTRL, rts_, active) \
616 | IO_STATE (R_SERIAL1_REC_CTRL, sampling, middle) \
617 | IO_STATE (R_SERIAL1_REC_CTRL, rec_stick_par, normal) \
618 | IO_STATE (R_SERIAL1_REC_CTRL, rec_par, even) \
619 | IO_STATE (R_SERIAL1_REC_CTRL, rec_par_en, disable) \
620 | IO_STATE (R_SERIAL1_REC_CTRL, rec_bitnr, rec_8bit),$r0
621 move.b $r0,[R_SERIAL1_REC_CTRL]
622
623 ; Set up and enable the serial1 transmitter.
624 move.b IO_FIELD (R_SERIAL1_TR_CTRL, txd, 0) \
625 | IO_STATE (R_SERIAL1_TR_CTRL, tr_enable, enable) \
626 | IO_STATE (R_SERIAL1_TR_CTRL, auto_cts, disabled) \
627 | IO_STATE (R_SERIAL1_TR_CTRL, stop_bits, one_bit) \
628 | IO_STATE (R_SERIAL1_TR_CTRL, tr_stick_par, normal) \
629 | IO_STATE (R_SERIAL1_TR_CTRL, tr_par, even) \
630 | IO_STATE (R_SERIAL1_TR_CTRL, tr_par_en, disable) \
631 | IO_STATE (R_SERIAL1_TR_CTRL, tr_bitnr, tr_8bit),$r0
632 move.b $r0,[R_SERIAL1_TR_CTRL]
633
634#ifdef CONFIG_ETRAX_SERIAL_PORT2
635 ;; setup the serial port 2 at 115200 baud for debug purposes
636
637 moveq IO_STATE (R_SERIAL2_XOFF, tx_stop, enable) \
638 | IO_STATE (R_SERIAL2_XOFF, auto_xoff, disable) \
639 | IO_FIELD (R_SERIAL2_XOFF, xoff_char, 0),$r0
640 move.d $r0,[R_SERIAL2_XOFF]
641
642 ; 115.2kbaud for both transmit and receive
643 move.b IO_STATE (R_SERIAL2_BAUD, tr_baud, c115k2Hz) \
644 | IO_STATE (R_SERIAL2_BAUD, rec_baud, c115k2Hz),$r0
645 move.b $r0,[R_SERIAL2_BAUD]
646
647 ; Set up and enable the serial2 receiver.
648 move.b IO_STATE (R_SERIAL2_REC_CTRL, dma_err, stop) \
649 | IO_STATE (R_SERIAL2_REC_CTRL, rec_enable, enable) \
650 | IO_STATE (R_SERIAL2_REC_CTRL, rts_, active) \
651 | IO_STATE (R_SERIAL2_REC_CTRL, sampling, middle) \
652 | IO_STATE (R_SERIAL2_REC_CTRL, rec_stick_par, normal) \
653 | IO_STATE (R_SERIAL2_REC_CTRL, rec_par, even) \
654 | IO_STATE (R_SERIAL2_REC_CTRL, rec_par_en, disable) \
655 | IO_STATE (R_SERIAL2_REC_CTRL, rec_bitnr, rec_8bit),$r0
656 move.b $r0,[R_SERIAL2_REC_CTRL]
657
658 ; Set up and enable the serial2 transmitter.
659 move.b IO_FIELD (R_SERIAL2_TR_CTRL, txd, 0) \
660 | IO_STATE (R_SERIAL2_TR_CTRL, tr_enable, enable) \
661 | IO_STATE (R_SERIAL2_TR_CTRL, auto_cts, disabled) \
662 | IO_STATE (R_SERIAL2_TR_CTRL, stop_bits, one_bit) \
663 | IO_STATE (R_SERIAL2_TR_CTRL, tr_stick_par, normal) \
664 | IO_STATE (R_SERIAL2_TR_CTRL, tr_par, even) \
665 | IO_STATE (R_SERIAL2_TR_CTRL, tr_par_en, disable) \
666 | IO_STATE (R_SERIAL2_TR_CTRL, tr_bitnr, tr_8bit),$r0
667 move.b $r0,[R_SERIAL2_TR_CTRL]
668#endif
669
670#ifdef CONFIG_ETRAX_SERIAL_PORT3
671 ;; setup the serial port 3 at 115200 baud for debug purposes
672
673 moveq IO_STATE (R_SERIAL3_XOFF, tx_stop, enable) \
674 | IO_STATE (R_SERIAL3_XOFF, auto_xoff, disable) \
675 | IO_FIELD (R_SERIAL3_XOFF, xoff_char, 0),$r0
676 move.d $r0,[R_SERIAL3_XOFF]
677
678 ; 115.2kbaud for both transmit and receive
679 move.b IO_STATE (R_SERIAL3_BAUD, tr_baud, c115k2Hz) \
680 | IO_STATE (R_SERIAL3_BAUD, rec_baud, c115k2Hz),$r0
681 move.b $r0,[R_SERIAL3_BAUD]
682
683 ; Set up and enable the serial3 receiver.
684 move.b IO_STATE (R_SERIAL3_REC_CTRL, dma_err, stop) \
685 | IO_STATE (R_SERIAL3_REC_CTRL, rec_enable, enable) \
686 | IO_STATE (R_SERIAL3_REC_CTRL, rts_, active) \
687 | IO_STATE (R_SERIAL3_REC_CTRL, sampling, middle) \
688 | IO_STATE (R_SERIAL3_REC_CTRL, rec_stick_par, normal) \
689 | IO_STATE (R_SERIAL3_REC_CTRL, rec_par, even) \
690 | IO_STATE (R_SERIAL3_REC_CTRL, rec_par_en, disable) \
691 | IO_STATE (R_SERIAL3_REC_CTRL, rec_bitnr, rec_8bit),$r0
692 move.b $r0,[R_SERIAL3_REC_CTRL]
693
694 ; Set up and enable the serial3 transmitter.
695 move.b IO_FIELD (R_SERIAL3_TR_CTRL, txd, 0) \
696 | IO_STATE (R_SERIAL3_TR_CTRL, tr_enable, enable) \
697 | IO_STATE (R_SERIAL3_TR_CTRL, auto_cts, disabled) \
698 | IO_STATE (R_SERIAL3_TR_CTRL, stop_bits, one_bit) \
699 | IO_STATE (R_SERIAL3_TR_CTRL, tr_stick_par, normal) \
700 | IO_STATE (R_SERIAL3_TR_CTRL, tr_par, even) \
701 | IO_STATE (R_SERIAL3_TR_CTRL, tr_par_en, disable) \
702 | IO_STATE (R_SERIAL3_TR_CTRL, tr_bitnr, tr_8bit),$r0
703 move.b $r0,[R_SERIAL3_TR_CTRL]
704#endif
705
706#endif /* CONFIG_SVINTO_SIM */
707
708 jump start_kernel ; jump into the C-function start_kernel in init/main.c
709
710 .data
711etrax_irv:
712 .dword 0
713romfs_start:
714 .dword 0
715romfs_length:
716 .dword 0
717romfs_in_flash:
718 .dword 0
719
720 ;; put some special pages at the beginning of the kernel aligned
721 ;; to page boundaries - the kernel cannot start until after this
722
723#ifdef CONFIG_CRIS_LOW_MAP
724swapper_pg_dir = 0x60002000
725#else
726swapper_pg_dir = 0xc0002000
727#endif
728
729 .section ".init.data", "aw"
730#include "../lib/hw_settings.S"