diff options
| -rw-r--r-- | arch/cris/arch-v10/kernel/head.S | 221 |
1 files changed, 43 insertions, 178 deletions
diff --git a/arch/cris/arch-v10/kernel/head.S b/arch/cris/arch-v10/kernel/head.S index d946d8b8d27..96344afc4eb 100644 --- a/arch/cris/arch-v10/kernel/head.S +++ b/arch/cris/arch-v10/kernel/head.S @@ -1,186 +1,10 @@ -/* $Id: head.S,v 1.10 2005/06/20 05:12:54 starvik Exp $ - * +/* * Head of the kernel - alter with care * * Copyright (C) 2000, 2001 Axis Communications AB * * Authors: Bjorn Wesen (bjornw@axis.com) * - * $Log: head.S,v $ - * Revision 1.10 2005/06/20 05:12:54 starvik - * Remove unnecessary diff to kernel.org tree - * - * Revision 1.9 2004/12/13 12:21:51 starvik - * Added I/O and DMA allocators from Linux 2.4 - * - * Revision 1.8 2004/11/22 11:41:14 starvik - * Kernel command line may be supplied to kernel. Not used by Axis but may - * be used by customers. - * - * Revision 1.7 2004/05/14 07:58:01 starvik - * Merge of changes from 2.4 - * - * Revision 1.6 2003/04/28 05:31:46 starvik - * Added section attributes - * - * Revision 1.5 2002/12/11 15:42:02 starvik - * Extracted v10 (ETRAX 100LX) specific stuff from arch/cris/kernel/*.c - * - * Revision 1.4 2002/11/07 09:00:44 starvik - * Names changed for init sections - * init_task_union -> init_thread_union - * - * Revision 1.3 2002/02/05 15:38:23 bjornw - * Oops.. non-CRAMFS_MAGIC should jump over the copying, not into it... - * - * Revision 1.2 2001/12/18 13:35:19 bjornw - * Applied the 2.4.13->2.4.16 CRIS patch to 2.5.1 (is a copy of 2.4.15). - * - * Revision 1.43 2001/11/08 15:09:43 starvik - * Only start MII clock if Ethernet is configured - * - * Revision 1.42 2001/11/08 14:37:34 starvik - * Start MII clock early to make sure that it is running at tranceiver reset - * - * Revision 1.41 2001/10/29 14:55:58 pkj - * Corrected pa$r0 to par0. - * - * Revision 1.40 2001/10/03 14:59:57 pkj - * Added support for resetting the Bluetooth hardware. - * - * Revision 1.39 2001/10/01 14:45:03 bjornw - * Removed underscores and added register prefixes - * - * Revision 1.38 2001/09/21 07:14:11 jonashg - * Made root filesystem (cramfs) use mtdblock driver when booting from flash. - * - * Revision 1.37 2001/09/11 13:44:29 orjanf - * Decouple usage of serial ports for debug and kgdb. - * - * Revision 1.36 2001/06/29 12:39:31 pkj - * Added support for mirroring the first flash to just below the - * second one, to make them look consecutive to cramfs. - * - * Revision 1.35 2001/06/25 14:07:00 hp - * Fix review comment. - * * head.S: Use IO_STATE, IO_FIELD and IO_MASK constructs instead of - * magic numbers. Add comment that -traditional must not be used. - * * entry.S (SYMBOL_NAME): Change redefinition to use ## concatenation. - * Correct and update comment. - * * Makefile (.S.o): Don't use -traditional. Add comment why the - * toplevel rule can't be used (now that there's a reason). - * - * Revision 1.34 2001/05/15 07:08:14 hp - * Tweak "notice" to reflect that both r8 r9 are used - * - * Revision 1.33 2001/05/15 06:40:05 hp - * Put bulk of code in .text.init, data in .data.init - * - * Revision 1.32 2001/05/15 06:18:56 hp - * Execute review comment: s/bcc/bhs/g; s/bcs/blo/g - * - * Revision 1.31 2001/05/15 06:08:40 hp - * Add sentence about autodetecting the bit31-MMU-bug - * - * Revision 1.30 2001/05/15 06:00:05 hp - * Update comment: LOW_MAP is not forced on xsim anymore. - * - * Revision 1.29 2001/04/18 12:51:59 orjanf - * * Reverted review change regarding the use of bcs/bcc. - * * Removed non-working LED-clearing code. - * - * Revision 1.28 2001/04/17 13:58:39 orjanf - * * Renamed CONFIG_KGDB to CONFIG_ETRAX_KGDB. - * - * Revision 1.27 2001/04/17 11:42:35 orjanf - * Changed according to review: - * * Added comment explaining memory map bug. - * * Changed bcs and bcc to blo and bhs, respectively. - * * Removed mentioning of Stallone and Olga boards. - * - * Revision 1.26 2001/04/06 12:31:07 jonashg - * Check for cramfs in flash before RAM instead of RAM before flash. - * - * Revision 1.25 2001/04/04 06:23:53 starvik - * Initialize DRAM if not already initialized - * - * Revision 1.24 2001/04/03 11:12:00 starvik - * Removed dram init (done by rescue or etrax100boot - * Corrected include - * - * Revision 1.23 2001/04/03 09:53:03 starvik - * Include hw_settings.S - * - * Revision 1.22 2001/03/26 14:23:26 bjornw - * Namechange of some config options - * - * Revision 1.21 2001/03/08 12:14:41 bjornw - * * Config name for ETRAX IDE was renamed - * * Removed G27 auto-setting when JULIETTE is chosen (need to make this - * a new config option later) - * - * Revision 1.20 2001/02/23 12:47:56 bjornw - * MMU regs during LOW_MAP updated to reflect a newer reality - * - * Revision 1.19 2001/02/19 11:12:07 bjornw - * Changed comment header format - * - * Revision 1.18 2001/02/15 07:25:38 starvik - * Added support for synchronous serial ports - * - * Revision 1.17 2001/02/08 15:53:13 starvik - * Last commit removed some important ifdefs - * - * Revision 1.16 2001/02/08 15:20:38 starvik - * Include dram_init.S as inline - * - * Revision 1.15 2001/01/29 18:12:01 bjornw - * Corrected some comments - * - * Revision 1.14 2001/01/29 13:11:29 starvik - * Include dram_init.S (with DRAM/SDRAM initialization) - * - * Revision 1.13 2001/01/23 14:54:57 markusl - * Updated for USB - * i.e. added r_gen_config settings - * - * Revision 1.12 2001/01/19 16:16:29 perf - * Added temporary mapping of 0x0c->0x0c to avoid flash loading confusion. - * Renamed serial options from ETRAX100 to ETRAX. - * - * Revision 1.11 2001/01/16 16:31:38 bjornw - * * Changed name and semantics of running_from_flash to romfs_in_flash, - * set by head.S to indicate to setup.c whether there is a cramfs image - * after the kernels BSS or not. Should work for all three boot-cases - * (DRAM with cramfs in DRAM, DRAM with cramfs in flash (compressed boot), - * and flash with cramfs in flash) - * - * Revision 1.10 2001/01/16 14:12:21 bjornw - * * Check for cramfs start passed in r9 from the decompressor, if all other - * cramfs options fail (if we boot from DRAM but don't find a cramfs image - * after the kernel in DRAM, it is probably still in the flash) - * * Check magic in cramfs detection when booting from flash directly - * - * Revision 1.9 2001/01/15 17:17:02 bjornw - * * Corrected the code that detects the cramfs lengths - * * Added a comment saying that the above does not work due to other - * reasons.. - * - * Revision 1.8 2001/01/15 16:27:51 jonashg - * Made boot after flashing work. - * * end destination is __vmlinux_end in RAM. - * * _romfs_start moved because of virtual memory. - * - * Revision 1.7 2000/11/21 13:55:29 bjornw - * Use CONFIG_CRIS_LOW_MAP for the low VM map instead of explicit CPU type - * - * Revision 1.6 2000/10/06 12:36:55 bjornw - * Forgot swapper_pg_dir when changing memory map.. - * - * Revision 1.5 2000/10/04 16:49:30 bjornw - * * Fixed memory mapping in LX - * * Check for cramfs instead of romfs - * */ #define ASSEMBLER_MACROS_ONLY @@ -595,11 +419,17 @@ no_command_line: moveq 0,$r0 + ;; Select or disable serial port 2 +#ifdef CONFIG_ETRAX_SERIAL_PORT2 + or.d IO_STATE (R_GEN_CONFIG, ser2, select),$r0 +#else + or.d IO_STATE (R_GEN_CONFIG, ser2, disable),$r0 +#endif + ;; Init interfaces (disable them). or.d IO_STATE (R_GEN_CONFIG, scsi0, disable) \ | IO_STATE (R_GEN_CONFIG, ata, disable) \ | IO_STATE (R_GEN_CONFIG, par0, disable) \ - | IO_STATE (R_GEN_CONFIG, ser2, disable) \ | IO_STATE (R_GEN_CONFIG, mio, disable) \ | IO_STATE (R_GEN_CONFIG, scsi1, disable) \ | IO_STATE (R_GEN_CONFIG, scsi0w, disable) \ @@ -801,6 +631,41 @@ no_command_line: | IO_STATE (R_SERIAL1_TR_CTRL, tr_bitnr, tr_8bit),$r0 move.b $r0,[R_SERIAL1_TR_CTRL] +#ifdef CONFIG_ETRAX_SERIAL_PORT2 + ;; setup the serial port 2 at 115200 baud for debug purposes + + moveq IO_STATE (R_SERIAL2_XOFF, tx_stop, enable) \ + | IO_STATE (R_SERIAL2_XOFF, auto_xoff, disable) \ + | IO_FIELD (R_SERIAL2_XOFF, xoff_char, 0),$r0 + move.d $r0,[R_SERIAL2_XOFF] + + ; 115.2kbaud for both transmit and receive + move.b IO_STATE (R_SERIAL2_BAUD, tr_baud, c115k2Hz) \ + | IO_STATE (R_SERIAL2_BAUD, rec_baud, c115k2Hz),$r0 + move.b $r0,[R_SERIAL2_BAUD] + + ; Set up and enable the serial2 receiver. + move.b IO_STATE (R_SERIAL2_REC_CTRL, dma_err, stop) \ + | IO_STATE (R_SERIAL2_REC_CTRL, rec_enable, enable) \ + | IO_STATE (R_SERIAL2_REC_CTRL, rts_, active) \ + | IO_STATE (R_SERIAL2_REC_CTRL, sampling, middle) \ + | IO_STATE (R_SERIAL2_REC_CTRL, rec_stick_par, normal) \ + | IO_STATE (R_SERIAL2_REC_CTRL, rec_par, even) \ + | IO_STATE (R_SERIAL2_REC_CTRL, rec_par_en, disable) \ + | IO_STATE (R_SERIAL2_REC_CTRL, rec_bitnr, rec_8bit),$r0 + move.b $r0,[R_SERIAL2_REC_CTRL] + + ; Set up and enable the serial2 transmitter. + move.b IO_FIELD (R_SERIAL2_TR_CTRL, txd, 0) \ + | IO_STATE (R_SERIAL2_TR_CTRL, tr_enable, enable) \ + | IO_STATE (R_SERIAL2_TR_CTRL, auto_cts, disabled) \ + | IO_STATE (R_SERIAL2_TR_CTRL, stop_bits, one_bit) \ + | IO_STATE (R_SERIAL2_TR_CTRL, tr_stick_par, normal) \ + | IO_STATE (R_SERIAL2_TR_CTRL, tr_par, even) \ + | IO_STATE (R_SERIAL2_TR_CTRL, tr_par_en, disable) \ + | IO_STATE (R_SERIAL2_TR_CTRL, tr_bitnr, tr_8bit),$r0 + move.b $r0,[R_SERIAL2_TR_CTRL] +#endif #ifdef CONFIG_ETRAX_SERIAL_PORT3 ;; setup the serial port 3 at 115200 baud for debug purposes |