4.104.114.84.95
Last change
on this file since 4a238002 was
4a238002,
checked in by Joel Sherrill <joel.sherrill@…>, on 11/18/99 at 21:22:58
|
Patch from "John M. Mills" <jmills@…> with subsequent cleanup from
Ralf Corsepius <corsepiu@…> that adds initial Hitachi SH-2
support to RTEMS. Ralf's comments are:
Changes:
------
- SH-Port:
- Many files renamed.
- CONSOLE_DEVNAME and MHZ defines removed from libcpu.
- console.c moved to libbsp/sh/shared, build in libbsp/sh/<BSP>/console
applying VPATH.
- CONSOLE_DEVNAME made BSP-specific, replacement is defined in bsp.h
- MHZ define replaced with HZ (extendent resolution) in custom/*.cfg
- -DHZ=HZ used in bspstart.c, only
- Makefile variable HZ used in bsp-dependent directories only.
- SH1-Port
- clock-driver rewritten to provide better resolution for odd CPU
frequencies. This driver is only partially tested on hardware, ie.
sightly experimental, but I don't expect severe problems with it.
- Polling SCI-driver added. This driver is experimental and completly
untested yet. Therefore it is not yet used for the console (/dev/console
is still pointing to /dev/null, cf. gensh1/bsp.h).
- minor changes to the timer driver
- SH1 specific delay()/CPU_delay() now is implemented as a function
- SH2-Port
- Merged
- IMO, the code is still in its infancy. Therefore I have interspersed
comments (FIXME) it for items which I think John should look after.
- sci and console drivers partially rewritten and extended (John, I hope
you don't mind).
- Copyright notices are not yet adapted
|
-
Property mode set to
100644
|
File size:
1.7 KB
|
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1 | /* |
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2 | * Authors: Ralf Corsepius (corsepiu@faw.uni-ulm.de) and |
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3 | * Bernd Becker (becker@faw.uni-ulm.de) |
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4 | * |
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5 | * COPYRIGHT (c) 1997-1998, FAW Ulm, Germany |
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6 | * |
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7 | * This program is distributed in the hope that it will be useful, |
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8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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10 | * |
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11 | * |
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12 | * COPYRIGHT (c) 1998. |
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13 | * On-Line Applications Research Corporation (OAR). |
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14 | * Copyright assigned to U.S. Government, 1994. |
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15 | * |
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16 | * The license and distribution terms for this file may be |
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17 | * found in the file LICENSE in this distribution or at |
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18 | * http://www.OARcorp.com/rtems/license.html. |
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19 | * |
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20 | * $Id$ |
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21 | */ |
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22 | |
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23 | #include "asm.h" |
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24 | |
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25 | BEGIN_CODE |
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26 | PUBLIC(start) |
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27 | SYM (start): |
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28 | ! install the stack pointer |
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29 | mov.l stack_k,r15 |
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30 | |
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31 | ! zero out bss |
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32 | mov.l edata_k,r0 |
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33 | mov.l end_k,r1 |
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34 | mov #0,r2 |
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35 | 0: |
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36 | mov.l r2,@r0 |
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37 | add #4,r0 |
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38 | cmp/ge r0,r1 |
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39 | bt 0b |
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40 | |
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41 | ! copy the vector table from rom to ram |
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42 | mov.l vects_k,r0 ! vectab |
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43 | mov #0,r1 ! address of boot vector table |
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44 | mov #0,r2 | number of bytes copied |
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45 | mov.w vects_size,r3 ! size of entries in vectab |
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46 | 1: |
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47 | mov.l @r1+,r4 |
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48 | mov.l r4,@r0 |
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49 | add #4,r0 |
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50 | add #1,r2 |
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51 | cmp/hi r3,r2 |
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52 | bf 1b |
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53 | |
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54 | mov.l vects_k,r0 ! update vbr to point to vectab |
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55 | ldc r0,vbr |
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56 | |
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57 | ! call the mainline |
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58 | mov #0,r4 ! argc |
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59 | mov.l main_k,r0 |
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60 | jsr @r0 |
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61 | mov #0,r5 ! argv |
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62 | |
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63 | ! call exit |
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64 | mov r0,r4 |
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65 | mov.l exit_k,r0 |
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66 | jsr @r0 |
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67 | or r0,r0 |
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68 | |
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69 | END_CODE |
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70 | |
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71 | .align 2 |
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72 | stack_k: |
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73 | .long SYM(stack) |
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74 | edata_k: |
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75 | .long SYM(edata) |
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76 | end_k: |
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77 | .long SYM(end) |
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78 | main_k: |
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79 | .long SYM(boot_card) |
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80 | exit_k: |
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81 | .long SYM(exit) |
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82 | |
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83 | vects_k: |
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84 | .long SYM(vectab) |
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85 | vects_size: |
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86 | .word 255 |
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87 | |
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88 | #ifdef __ELF__ |
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89 | .section .stack,"aw" |
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90 | #else |
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91 | .section .stack |
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92 | #endif |
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93 | SYM(stack): |
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94 | .long 0xdeaddead |
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