adamdunkels | 4fa940f | 2003-04-11 20:30:14 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2001, Adam Dunkels. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
adamdunkels | 503df8d | 2004-07-04 20:01:15 +0000 | [diff] [blame] | 13 | * 3. The name of the author may not be used to endorse or promote |
adamdunkels | 4fa940f | 2003-04-11 20:30:14 +0000 | [diff] [blame] | 14 | * products derived from this software without specific prior |
| 15 | * written permission. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS |
| 18 | * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| 19 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
| 21 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE |
| 23 | * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 24 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 25 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 26 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 27 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 28 | * |
| 29 | * This file is part of the uIP TCP/IP stack. |
| 30 | * |
oliverschmidt | 14be9d2 | 2005-01-26 23:36:37 +0000 | [diff] [blame] | 31 | * $Id: uip_arch.c,v 1.4 2005/01/26 23:36:37 oliverschmidt Exp $ |
adamdunkels | 4fa940f | 2003-04-11 20:30:14 +0000 | [diff] [blame] | 32 | * |
| 33 | */ |
| 34 | |
| 35 | |
| 36 | #include "uip.h" |
| 37 | #include "uip_arch.h" |
| 38 | |
| 39 | #define BUF ((uip_tcpip_hdr *)&uip_buf[UIP_LLH_LEN]) |
| 40 | #define IP_PROTO_TCP 6 |
| 41 | |
| 42 | /*-----------------------------------------------------------------------------------*/ |
oliverschmidt | a5b57db | 2004-07-18 13:23:28 +0000 | [diff] [blame] | 43 | #pragma optimize(push, off) |
adamdunkels | 4fa940f | 2003-04-11 20:30:14 +0000 | [diff] [blame] | 44 | void |
| 45 | uip_add32(u8_t *op32, u16_t op16) |
| 46 | { |
| 47 | asm("ldy #3"); |
| 48 | asm("jsr ldaxysp"); |
| 49 | asm("sta ptr1"); |
| 50 | asm("stx ptr1+1"); |
| 51 | asm("ldy #0"); |
| 52 | asm("lda (sp),y"); |
| 53 | asm("ldy #3"); |
| 54 | asm("clc"); |
| 55 | asm("adc (ptr1),y"); |
| 56 | asm("sta _uip_acc32+3"); |
| 57 | asm("dey"); |
| 58 | asm("lda (ptr1),y"); |
| 59 | asm("ldy #1"); |
| 60 | asm("adc (sp),y"); |
| 61 | asm("sta _uip_acc32+2"); |
| 62 | asm("ldy #1"); |
| 63 | asm("lda (ptr1),y"); |
| 64 | asm("adc #0"); |
| 65 | asm("sta _uip_acc32+1"); |
| 66 | asm("dey"); |
| 67 | asm("lda (ptr1),y"); |
| 68 | asm("adc #0"); |
| 69 | asm("sta _uip_acc32+0"); |
| 70 | } |
oliverschmidt | a5b57db | 2004-07-18 13:23:28 +0000 | [diff] [blame] | 71 | #pragma optimize(pop) |
adamdunkels | 4fa940f | 2003-04-11 20:30:14 +0000 | [diff] [blame] | 72 | /*-----------------------------------------------------------------------------------*/ |
adamdunkels | 4fa940f | 2003-04-11 20:30:14 +0000 | [diff] [blame] | 73 | static u16_t chksum_ptr, chksum_len, chksum_tmp; |
| 74 | static u16_t chksum(void); |
| 75 | /*-----------------------------------------------------------------------------------*/ |
oliverschmidt | a5b57db | 2004-07-18 13:23:28 +0000 | [diff] [blame] | 76 | #pragma optimize(push, off) |
adamdunkels | 4fa940f | 2003-04-11 20:30:14 +0000 | [diff] [blame] | 77 | u16_t |
| 78 | chksum(void) { |
| 79 | |
| 80 | asm("lda #0"); |
| 81 | asm("sta tmp1"); |
| 82 | asm("sta tmp1+1"); |
| 83 | asm("lda _chksum_ptr"); |
| 84 | asm("sta ptr1"); |
| 85 | asm("lda _chksum_ptr+1"); |
| 86 | asm("sta ptr1+1"); |
| 87 | |
| 88 | |
| 89 | asm("lda _chksum_len+1"); |
| 90 | asm("beq chksumlast"); |
| 91 | |
| 92 | |
| 93 | /* If checksum is > 256, do the first runs. */ |
| 94 | asm("ldy #0"); |
| 95 | asm("clc"); |
| 96 | asm("chksumloop_256:"); |
| 97 | asm("lda (ptr1),y"); |
| 98 | asm("adc tmp1"); |
| 99 | asm("sta tmp1"); |
| 100 | asm("iny"); |
| 101 | asm("lda (ptr1),y"); |
| 102 | asm("adc tmp1+1"); |
| 103 | asm("sta tmp1+1"); |
| 104 | asm("iny"); |
| 105 | asm("bne chksumloop_256"); |
| 106 | asm("inc ptr1+1"); |
| 107 | asm("dec _chksum_len+1"); |
| 108 | asm("bne chksumloop_256"); |
| 109 | |
| 110 | asm("chksum_endloop_256:"); |
| 111 | asm("lda tmp1"); |
| 112 | asm("adc #0"); |
| 113 | asm("sta tmp1"); |
| 114 | asm("lda tmp1+1"); |
| 115 | asm("adc #0"); |
| 116 | asm("sta tmp1+1"); |
| 117 | asm("bcs chksum_endloop_256"); |
| 118 | |
| 119 | asm("chksumlast:"); |
| 120 | asm("lda _chksum_len"); |
| 121 | asm("lsr"); |
| 122 | asm("bcc chksum_noodd"); |
| 123 | asm("ldy _chksum_len"); |
| 124 | asm("dey"); |
| 125 | asm("lda (ptr1),y"); |
| 126 | asm("clc"); |
| 127 | asm("adc tmp1"); |
| 128 | asm("sta tmp1"); |
| 129 | asm("bcc noinc1"); |
| 130 | asm("inc tmp1+1"); |
| 131 | asm("bne noinc1"); |
| 132 | asm("inc tmp1"); |
| 133 | asm("noinc1:"); |
| 134 | asm("dec _chksum_len"); |
| 135 | |
| 136 | asm("chksum_noodd:"); |
| 137 | asm("clc"); |
| 138 | asm("php"); |
| 139 | asm("ldy _chksum_len"); |
| 140 | asm("chksum_loop1:"); |
| 141 | asm("cpy #0"); |
| 142 | asm("beq chksum_loop1_end"); |
| 143 | asm("plp"); |
| 144 | asm("dey"); |
| 145 | asm("dey"); |
| 146 | asm("lda (ptr1),y"); |
| 147 | asm("adc tmp1"); |
| 148 | asm("sta tmp1"); |
| 149 | asm("iny"); |
| 150 | asm("lda (ptr1),y"); |
| 151 | asm("adc tmp1+1"); |
| 152 | asm("sta tmp1+1"); |
| 153 | asm("dey"); |
| 154 | asm("php"); |
| 155 | asm("jmp chksum_loop1"); |
| 156 | asm("chksum_loop1_end:"); |
| 157 | asm("plp"); |
| 158 | |
| 159 | asm("chksum_endloop:"); |
| 160 | asm("lda tmp1"); |
| 161 | asm("adc #0"); |
| 162 | asm("sta tmp1"); |
| 163 | asm("lda tmp1+1"); |
| 164 | asm("adc #0"); |
| 165 | asm("sta tmp1+1"); |
| 166 | asm("bcs chksum_endloop"); |
| 167 | |
| 168 | asm("lda tmp1"); |
| 169 | asm("ldx tmp1+1"); |
| 170 | } |
oliverschmidt | a5b57db | 2004-07-18 13:23:28 +0000 | [diff] [blame] | 171 | #pragma optimize(pop) |
adamdunkels | 4fa940f | 2003-04-11 20:30:14 +0000 | [diff] [blame] | 172 | /*-----------------------------------------------------------------------------------*/ |
| 173 | u16_t |
| 174 | uip_chksum(u16_t *buf, u16_t len) |
| 175 | { |
| 176 | /* unsigned long sum; |
| 177 | |
| 178 | sum = 0; |
| 179 | |
| 180 | chksum_ptr = (u16_t)buf; |
| 181 | while(len >= 256) { |
| 182 | chksum_len = 256; |
| 183 | sum += chksum(); |
| 184 | len -= 256; |
| 185 | chksum_ptr += 256; |
| 186 | } |
| 187 | |
| 188 | if(len < 256) { |
| 189 | chksum_len = len; |
| 190 | sum += chksum(); |
| 191 | } |
| 192 | |
| 193 | while((sum >> 16) != 0) { |
| 194 | sum = (sum >> 16) + (sum & 0xffff); |
| 195 | } |
| 196 | |
| 197 | return sum;*/ |
| 198 | |
| 199 | chksum_len = len; |
| 200 | chksum_ptr = (u16_t)buf; |
| 201 | return chksum(); |
| 202 | } |
| 203 | /*-----------------------------------------------------------------------------------*/ |
| 204 | u16_t |
| 205 | uip_ipchksum(void) |
| 206 | { |
| 207 | chksum_ptr = (u16_t)uip_buf + UIP_LLH_LEN; |
| 208 | chksum_len = 20; |
| 209 | return chksum(); |
| 210 | } |
| 211 | /*-----------------------------------------------------------------------------------*/ |
oliverschmidt | a5b57db | 2004-07-18 13:23:28 +0000 | [diff] [blame] | 212 | #pragma optimize(push, off) |
adamdunkels | 4fa940f | 2003-04-11 20:30:14 +0000 | [diff] [blame] | 213 | u16_t |
| 214 | uip_tcpchksum(void) |
| 215 | { |
| 216 | chksum_ptr = (u16_t)&uip_buf[20 + UIP_LLH_LEN]; |
| 217 | chksum_len = 20; |
| 218 | chksum_tmp = chksum(); |
| 219 | |
| 220 | chksum_ptr = (u16_t)uip_appdata; |
| 221 | #ifdef WITH_TFE |
| 222 | asm("lda _uip_buf+3+14"); |
| 223 | #else /* WITH_TFE */ |
| 224 | asm("lda _uip_buf+3"); |
| 225 | #endif /* WITH_TFE */ |
| 226 | asm("sec"); |
| 227 | asm("sbc #40"); |
| 228 | asm("sta _chksum_len"); |
| 229 | #ifdef WITH_TFE |
| 230 | asm("lda _uip_buf+2+14"); |
| 231 | #else /* WITH_TFE */ |
| 232 | asm("lda _uip_buf+2"); |
| 233 | #endif /* WITH_TFE */ |
| 234 | asm("sbc #0"); |
| 235 | asm("sta _chksum_len+1"); |
| 236 | |
| 237 | asm("jsr %v", chksum); |
| 238 | |
| 239 | asm("clc"); |
| 240 | asm("adc _chksum_tmp"); |
| 241 | asm("sta _chksum_tmp"); |
| 242 | asm("txa"); |
| 243 | asm("adc _chksum_tmp+1"); |
| 244 | asm("sta _chksum_tmp+1"); |
| 245 | |
| 246 | /* Fold carry */ |
| 247 | /* asm("bcc noinc"); |
| 248 | asm("inc _chksum_tmp"); |
| 249 | asm("noinc:");*/ |
| 250 | |
| 251 | asm("tcpchksum_loop1:"); |
| 252 | asm("lda _chksum_tmp"); |
| 253 | asm("adc #0"); |
| 254 | asm("sta _chksum_tmp"); |
| 255 | asm("lda _chksum_tmp+1"); |
| 256 | asm("adc #0"); |
| 257 | asm("sta _chksum_tmp+1"); |
| 258 | asm("bcs tcpchksum_loop1"); |
| 259 | |
| 260 | |
| 261 | #ifdef WITH_TFE |
| 262 | asm("lda _uip_buf+3+14"); |
| 263 | #else /* WITH_TFE */ |
| 264 | asm("lda _uip_buf+3"); |
| 265 | #endif /* WITH_TFE */ |
| 266 | asm("sec"); |
| 267 | asm("sbc #20"); |
| 268 | asm("sta _chksum_len"); |
| 269 | #ifdef WITH_TFE |
| 270 | asm("lda _uip_buf+2+14"); |
| 271 | #else /* WITH_TFE */ |
| 272 | asm("lda _uip_buf+2"); |
| 273 | #endif /* WITH_TFE */ |
| 274 | asm("sbc #0"); |
| 275 | asm("sta _chksum_len+1"); |
| 276 | |
| 277 | |
| 278 | asm("ldy #$0c"); |
| 279 | asm("clc"); |
| 280 | asm("php"); |
| 281 | asm("tcpchksum_loop2:"); |
| 282 | asm("plp"); |
| 283 | #ifdef WITH_TFE |
| 284 | asm("lda _uip_buf+14,y"); |
| 285 | #else /* WITH_TFE */ |
| 286 | asm("lda _uip_buf,y"); |
| 287 | #endif /* WITH_TFE */ |
| 288 | asm("adc _chksum_tmp"); |
| 289 | asm("sta _chksum_tmp"); |
| 290 | asm("iny"); |
| 291 | #ifdef WITH_TFE |
| 292 | asm("lda _uip_buf+14,y"); |
| 293 | #else /* WITH_TFE */ |
| 294 | asm("lda _uip_buf,y"); |
| 295 | #endif /* WITH_TFE */ |
| 296 | asm("adc _chksum_tmp+1"); |
| 297 | asm("sta _chksum_tmp+1"); |
| 298 | asm("iny"); |
| 299 | asm("php"); |
| 300 | asm("cpy #$14"); |
| 301 | asm("bne tcpchksum_loop2"); |
| 302 | |
| 303 | asm("plp"); |
| 304 | |
| 305 | asm("lda _chksum_tmp"); |
| 306 | asm("adc #0"); |
| 307 | asm("sta _chksum_tmp"); |
| 308 | asm("lda _chksum_tmp+1"); |
| 309 | asm("adc #6"); /* IP_PROTO_TCP */ |
| 310 | asm("sta _chksum_tmp+1"); |
| 311 | |
| 312 | |
| 313 | asm("lda _chksum_tmp"); |
| 314 | asm("adc _chksum_len+1"); |
| 315 | asm("sta _chksum_tmp"); |
| 316 | asm("lda _chksum_tmp+1"); |
| 317 | asm("adc _chksum_len"); |
| 318 | asm("sta _chksum_tmp+1"); |
| 319 | |
| 320 | |
| 321 | |
| 322 | asm("tcpchksum_loop3:"); |
| 323 | asm("lda _chksum_tmp"); |
| 324 | asm("adc #0"); |
| 325 | asm("sta _chksum_tmp"); |
| 326 | asm("lda _chksum_tmp+1"); |
| 327 | asm("adc #0"); |
| 328 | asm("sta _chksum_tmp+1"); |
| 329 | asm("bcs tcpchksum_loop3"); |
| 330 | |
| 331 | |
| 332 | return chksum_tmp; |
| 333 | } |
oliverschmidt | a5b57db | 2004-07-18 13:23:28 +0000 | [diff] [blame] | 334 | #pragma optimize(pop) |
adamdunkels | 4fa940f | 2003-04-11 20:30:14 +0000 | [diff] [blame] | 335 | /*-----------------------------------------------------------------------------------*/ |