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comparison packages/hal/mips/tx39/current/include/variant.inc @ 6:d376b777e2ce ecos-sw-1999-05-14

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Merge from eCos master repository on 1999-05-14-19:27:43-BST
author jlarmour
date Fri, 14 May 1999 12:20:00 +0000
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children 29bc183297e1
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5:4e8259f41183 6:d376b777e2ce
1 #ifndef CYGONCE_HAL_IMPL_INC
2 #define CYGONCE_HAL_IMPL_INC
3 ##=============================================================================
4 ##
5 ## impl.inc
6 ##
7 ## TX39 family assembler header file
8 ##
9 ##=============================================================================
10 #####COPYRIGHTBEGIN####
11 #
12 # -------------------------------------------
13 # The contents of this file are subject to the Cygnus eCos Public License
14 # Version 1.0 (the "License"); you may not use this file except in
15 # compliance with the License. You may obtain a copy of the License at
16 # http://sourceware.cygnus.com/ecos
17 #
18 # Software distributed under the License is distributed on an "AS IS"
19 # basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
20 # License for the specific language governing rights and limitations under
21 # the License.
22 #
23 # The Original Code is eCos - Embedded Cygnus Operating System, released
24 # September 30, 1998.
25 #
26 # The Initial Developer of the Original Code is Cygnus. Portions created
27 # by Cygnus are Copyright (C) 1998,1999 Cygnus Solutions. All Rights Reserved.
28 # -------------------------------------------
29 #
30 #####COPYRIGHTEND####
31 ##=============================================================================
32 #######DESCRIPTIONBEGIN####
33 ##
34 ## Author(s): nickg
35 ## Contributors: nickg
36 ## Date: 1999-04-06
37 ## Purpose: TX39 family definitions.
38 ## Description: This file contains various definitions and macros that are
39 ## useful for writing assembly code for the TX39 CPU family.
40 ## Usage:
41 ## #include <cyg/hal/impl.inc>
42 ## ...
43 ##
44 ##
45 ######DESCRIPTIONEND####
46 ##
47 ##=============================================================================
48
49 #include <cyg/hal/mips.inc>
50
51 #include <cyg/hal/platform.inc>
52
53 #include <pkgconf/hal.h>
54
55 ##-----------------------------------------------------------------------------
56 ## Define CPU variant for architecture HAL.
57
58 #define CYG_HAL_MIPS_R3000A
59 #define CYG_HAL_MIPS_R3900
60
61 ##-----------------------------------------------------------------------------
62 ## Indicate that the ISR tables are defined in variant.S
63
64 #define CYG_HAL_MIPS_ISR_TABLES_DEFINED
65
66 ##-----------------------------------------------------------------------------
67 ## TX39 Memory controller.
68
69 #ifndef CYGPKG_HAL_MIPS_MEMC_DEFINED
70
71 ## ROM timing characteristics are dependent on the clock speed.
72
73 #if (CYGHWR_HAL_MIPS_CPU_FREQ == 50)
74 #define ROM_CCR0_INIT 0x00000420
75 #define DRAM_DREFC_INIT 0x00000180
76 #elif (CYGHWR_HAL_MIPS_CPU_FREQ == 66)
77 #define ROM_CCR0_INIT 0x00000520
78 #define DRAM_DREFC_INIT 0x00000200
79 #else
80 #error Unsupported clock frequency
81 #endif
82
83 ## DRAM configuration is dependent on the DRAM device used.
84 ## for 16MByte (4MBit (x4bit) x 8) 0x08024030
85 ## for 4MByte (1MBit (x4bit) x 8) 0x08013020
86 ## for 8MByte (1MBit (x4bit) x 8 x 2 banks) 0x08013020
87
88 #if defined CYGHWR_HAL_TX39_JMR3904_DRAM_CONFIG_INIT
89 #define DRAM_CONFIG_INIT CYGHWR_HAL_TX39_JMR3904_DRAM_CONFIG_INIT
90 #else
91 #define DRAM_CONFIG_INIT 0x08024030
92 #endif
93
94 #ifdef CYG_HAL_MIPS_JMR3904
95 .macro hal_memc_init
96
97 # These mappings need to be set up before we
98 # can use the stack and make calls to other
99 # functions
100
101 # If we have been started from Cygmon, it should have
102 # already done a lot of this, but it should do no harm
103 # to reinitialize the following registers.
104
105 # SCS0,1 base addr of ISA & PCI
106 la v0,0xffffe010
107 la v1,0x20201410
108 sw v1,0(v0)
109
110 la v0,0xffffe014
111 la v1,0xfffffcfc
112 sw v1,0(v0)
113
114 # ROM configuration
115 .set at
116 la v0,0xffff9000
117 lw v1,0(v0)
118 and v1,v1,0xffff0004 # keep hardware defaults
119 or v1,ROM_CCR0_INIT # install our values
120 sw v1,0(v0)
121 .set noat
122
123 # SRAM config
124 la v0,0xffff9100
125 la v1,0x00000000
126 sw v1,0(v0)
127
128 # ISA bus setup
129 la v0,0xb2100000
130 la v1,4
131 sb v1,0(v0)
132
133 # Clear IMR (to cope with JMON)
134 la v0,0xffffc004
135 la v1,0x00000000
136 sw v1,0(v0)
137
138 #if defined(CYG_HAL_STARTUP_ROM)
139
140 # Only do this in ROM configurations.
141
142 # DRAM Configuration
143 la v0, 0xffff8000
144 la v1, DRAM_CONFIG_INIT
145 sw v1, 0(v0)
146
147 # DBMR0
148 la v0, 0xffff8004
149 la v1, 0x00000000
150 sw v1, 0(v0)
151
152 # DWR0
153 la v0, 0xffff8008
154 la v1, 0x00000000
155 sw v1, 0(v0)
156
157 # DREFC - Depends on clock requency
158 la v0, 0xffff8800
159 la v1, DRAM_DREFC_INIT
160 sw v1, 0(v0)
161
162 #endif
163
164 .endm
165 #endif
166
167 #endif
168
169 ##-----------------------------------------------------------------------------
170 ## TX39 interrupt handling.
171
172 #ifndef CYGPKG_HAL_MIPS_INTC_DEFINED
173
174 #ifdef CYGPKG_HAL_MIPS_TX3904
175
176 # Set all ILRX registers to 0, masking all external interrupts.
177 .macro hal_intc_init
178 la v0,0xFFFFC010
179 move v1,zero
180 sw v1,0(v0)
181 sw v1,4(v0)
182 sw v1,8(v0)
183 sw v1,12(v0)
184 .endm
185
186 .macro hal_intc_decode vnum
187 mfc0 v1,cause # get cause register
188 nop
189 srl v1,v1,10 # shift IP bits to ls bits
190 andi v1,v1,0x7F # isolate IP bits
191 la v0,hal_intc_translation_table # address of translation table
192 add v0,v0,v1 # offset of index byte
193 lb \vnum,0(v0) # load it
194 .endm
195
196
197 # This table translates from the 6 bit value supplied in the IP bits
198 # of the cause register into a 0..16 offset into the ISR tables.
199 .macro hal_intc_decode_data
200 hal_intc_translation_table:
201 .byte 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
202 .byte 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
203 .byte 16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16
204 .byte 16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16
205 .endm
206
207 #define CYGPKG_HAL_MIPS_INTC_DEFINED
208
209 #else
210
211 #error Unknown TX39 variant
212
213 #endif
214
215 #endif
216
217 #------------------------------------------------------------------------------
218 # Diagnostics macros.
219
220 #if 0
221 #ifndef CYGPKG_HAL_MIPS_DIAG_DEFINED
222
223 # Set up PIO0 for debugging output
224 .macro hal_diag_init
225 la v0,0xfffff500
226 la v1,0xff
227 sb v1,0(v0)
228 la v1,0
229 sb v1,4(v0)
230 .endm
231
232 #define CYGPKG_HAL_MIPS_DIAG_DEFINED
233
234 #endif
235 #endif
236
237 #------------------------------------------------------------------------------
238 #endif // ifndef CYGONCE_HAL_IMPL_INC
239 # end of impl.inc