|
|
/*===============================================================*\
| Project: RTEMS generic mcf548x BSP |
+-----------------------------------------------------------------+
| File: start.S |
+-----------------------------------------------------------------+
| The file contains the assembly part of MCF548x init code |
+-----------------------------------------------------------------+
| Copyright (c) 2007 |
| Embedded Brains GmbH |
| Obere Lagerstr. 30 |
| D-82178 Puchheim |
| Germany |
| rtems@embedded-brains.de |
+-----------------------------------------------------------------+
| |
| Parts of the code has been derived from the "dBUG source code" |
| package Freescale is providing for M548X EVBs. The usage of |
| the modified or unmodified code and it's integration into the |
| generic mcf548x BSP has been done according to the Freescale |
| license terms. |
| |
| The Freescale license terms can be reviewed in the file |
| |
| Freescale_license.txt |
| |
+-----------------------------------------------------------------+
| |
| The generic mcf548x BSP has been developed on the basic |
| structures and modules of the av5282 BSP. |
| |
+-----------------------------------------------------------------+
| |
| The license and distribution terms for this file may be |
| found in the file LICENSE in this distribution or at |
| |
| http://www.rtems.org/license/LICENSE. |
| |
+-----------------------------------------------------------------+
| |
| date history ID |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 12.11.07 1.0 ras |
| |
\*===============================================================*/
/*===============================================================*\
| Includes |
\*===============================================================*/
#include <rtems/asm.h>
#include <bsp/linker-symbols.h>
/*===============================================================*\
| External references |
\*===============================================================*/
.extern __MBAR
.extern _CoreSramBase0
.extern _CoreSramBase1
.extern _CoreSramSize1
.extern mcf548x_init
.extern boot_card
/*===============================================================*\
| Global symbols |
\*===============================================================*/
.global interrupt_vector_table
.global spurious_int_count
.global start
/*===============================================================*\
| Exception Table |
\*===============================================================*/
.section ".vectors","ax" /* begin of vectors section */
PUBLIC (InterruptVectorTable)
SYM(InterruptVectorTable):
INITSP: .long bsp_initstack_end /* Initial SP */
INITPC: .long start /* Initial PC */
vector002: .long asm_default_interrupt /* Access Error */
vector003: .long asm_default_interrupt /* Address Error */
vector004: .long asm_default_interrupt /* Illegal Instruction */
vector005: .long asm_default_interrupt /* Reserved */
vector006: .long asm_default_interrupt /* Reserved */
vector007: .long asm_default_interrupt /* Reserved */
vector008: .long asm_default_interrupt /* Privilege Violation */
vector009: .long asm_default_interrupt /* Trace */
vector010: .long asm_default_interrupt /* Unimplemented A-Line */
vector011: .long asm_default_interrupt /* Unimplemented F-Line */
vector012: .long asm_default_interrupt /* Debug Interrupt */
vector013: .long asm_default_interrupt /* Reserved */
vector014: .long asm_default_interrupt /* Format Error */
vector015: .long asm_default_interrupt /* Unitialized Int. */
vector016: .long asm_default_interrupt /* Reserved */
vector017: .long asm_default_interrupt /* Reserved */
vector018: .long asm_default_interrupt /* Reserved */
vector019: .long asm_default_interrupt /* Reserved */
vector020: .long asm_default_interrupt /* Reserved */
vector021: .long asm_default_interrupt /* Reserved */
vector022: .long asm_default_interrupt /* Reserved */
vector023: .long asm_default_interrupt /* Reserved */
vector024: .long asm_spurious_interrupt /* Spurious Interrupt */
vector025: .long asm_default_interrupt /* Autovector Level 1 */
vector026: .long asm_default_interrupt /* Autovector Level 2 */
vector027: .long asm_default_interrupt /* Autovector Level 3 */
vector028: .long asm_default_interrupt /* Autovector Level 4 */
vector029: .long asm_default_interrupt /* Autovector Level 5 */
vector030: .long asm_default_interrupt /* Autovector Level 6 */
vector031: .long asm_default_interrupt /* Autovector Level 7 */
vector032: .long asm_default_interrupt /* TRAP #0 */
vector033: .long asm_default_interrupt /* TRAP #1 */
vector034: .long asm_default_interrupt /* TRAP #2 */
vector035: .long asm_default_interrupt /* TRAP #3 */
vector036: .long asm_default_interrupt /* TRAP #4 */
vector037: .long asm_default_interrupt /* TRAP #5 */
vector038: .long asm_default_interrupt /* TRAP #6 */
vector039: .long asm_default_interrupt /* TRAP #7 */
vector040: .long asm_default_interrupt /* TRAP #8 */
vector041: .long asm_default_interrupt /* TRAP #9 */
vector042: .long asm_default_interrupt /* TRAP #10 */
vector043: .long asm_default_interrupt /* TRAP #11 */
vector044: .long asm_default_interrupt /* TRAP #12 */
vector045: .long asm_default_interrupt /* TRAP #13 */
vector046: .long asm_default_interrupt /* TRAP #14 */
vector047: .long asm_default_interrupt /* TRAP #15 */
vector048: .long asm_default_interrupt /* Reserved */
vector049: .long asm_default_interrupt /* Reserved */
vector050: .long asm_default_interrupt /* Reserved */
vector051: .long asm_default_interrupt /* Reserved */
vector052: .long asm_default_interrupt /* Reserved */
vector053: .long asm_default_interrupt /* Reserved */
vector054: .long asm_default_interrupt /* Reserved */
vector055: .long asm_default_interrupt /* Reserved */
vector056: .long asm_default_interrupt /* Reserved */
vector057: .long asm_default_interrupt /* Reserved */
vector058: .long asm_default_interrupt /* Reserved */
vector059: .long asm_default_interrupt /* Reserved */
vector060: .long asm_default_interrupt /* Reserved */
vector061: .long asm_default_interrupt /* Reserved */
vector062: .long asm_default_interrupt /* Reserved */
vector063: .long asm_default_interrupt /* Reserved */
vector064: .long asm_default_interrupt
vector065: .long asm_default_interrupt
vector066: .long asm_default_interrupt
vector067: .long asm_default_interrupt
vector068: .long asm_default_interrupt
vector069: .long asm_default_interrupt
vector070: .long asm_default_interrupt
vector071: .long asm_default_interrupt
vector072: .long asm_default_interrupt
vector073: .long asm_default_interrupt
vector074: .long asm_default_interrupt
vector075: .long asm_default_interrupt
vector076: .long asm_default_interrupt
vector077: .long asm_default_interrupt
vector078: .long asm_default_interrupt
vector079: .long asm_default_interrupt
vector080: .long asm_default_interrupt
vector081: .long asm_default_interrupt
vector082: .long asm_default_interrupt
vector083: .long asm_default_interrupt
vector084: .long asm_default_interrupt
vector085: .long asm_default_interrupt
vector086: .long asm_default_interrupt
vector087: .long asm_default_interrupt
vector088: .long asm_default_interrupt
vector089: .long asm_default_interrupt
vector090: .long asm_default_interrupt
vector091: .long asm_default_interrupt
vector092: .long asm_default_interrupt
vector093: .long asm_default_interrupt
vector094: .long asm_default_interrupt
vector095: .long asm_default_interrupt
vector096: .long asm_default_interrupt
vector097: .long asm_default_interrupt
vector098: .long asm_default_interrupt
vector099: .long asm_default_interrupt
vector100: .long asm_default_interrupt
vector101: .long asm_default_interrupt
vector102: .long asm_default_interrupt
vector103: .long asm_default_interrupt
vector104: .long asm_default_interrupt
vector105: .long asm_default_interrupt
vector106: .long asm_default_interrupt
vector107: .long asm_default_interrupt
vector108: .long asm_default_interrupt
vector109: .long asm_default_interrupt
vector110: .long asm_default_interrupt
vector111: .long asm_default_interrupt
vector112: .long asm_default_interrupt
vector113: .long asm_default_interrupt
vector114: .long asm_default_interrupt
vector115: .long asm_default_interrupt
vector116: .long asm_default_interrupt
vector117: .long asm_default_interrupt
vector118: .long asm_default_interrupt
vector119: .long asm_default_interrupt
vector120: .long asm_default_interrupt
vector121: .long asm_default_interrupt
vector122: .long asm_default_interrupt
vector123: .long asm_default_interrupt
vector124: .long asm_default_interrupt
vector125: .long asm_default_interrupt
vector126: .long asm_default_interrupt
vector127: .long asm_default_interrupt
vector128: .long asm_default_interrupt
vector129: .long asm_default_interrupt
vector130: .long asm_default_interrupt
vector131: .long asm_default_interrupt
vector132: .long asm_default_interrupt
vector133: .long asm_default_interrupt
vector134: .long asm_default_interrupt
vector135: .long asm_default_interrupt
vector136: .long asm_default_interrupt
vector137: .long asm_default_interrupt
vector138: .long asm_default_interrupt
vector139: .long asm_default_interrupt
vector140: .long asm_default_interrupt
vector141: .long asm_default_interrupt
vector142: .long asm_default_interrupt
vector143: .long asm_default_interrupt
vector144: .long asm_default_interrupt
vector145: .long asm_default_interrupt
vector146: .long asm_default_interrupt
vector147: .long asm_default_interrupt
vector148: .long asm_default_interrupt
vector149: .long asm_default_interrupt
vector150: .long asm_default_interrupt
vector151: .long asm_default_interrupt
vector152: .long asm_default_interrupt
vector153: .long asm_default_interrupt
vector154: .long asm_default_interrupt
vector155: .long asm_default_interrupt
vector156: .long asm_default_interrupt
vector157: .long asm_default_interrupt
vector158: .long asm_default_interrupt
vector159: .long asm_default_interrupt
vector160: .long asm_default_interrupt
vector161: .long asm_default_interrupt
vector162: .long asm_default_interrupt
vector163: .long asm_default_interrupt
vector164: .long asm_default_interrupt
vector165: .long asm_default_interrupt
vector166: .long asm_default_interrupt
vector167: .long asm_default_interrupt
vector168: .long asm_default_interrupt
vector169: .long asm_default_interrupt
vector170: .long asm_default_interrupt
vector171: .long asm_default_interrupt
vector172: .long asm_default_interrupt
vector173: .long asm_default_interrupt
vector174: .long asm_default_interrupt
vector175: .long asm_default_interrupt
vector176: .long asm_default_interrupt
vector177: .long asm_default_interrupt
vector178: .long asm_default_interrupt
vector179: .long asm_default_interrupt
vector180: .long asm_default_interrupt
vector181: .long asm_default_interrupt
vector182: .long asm_default_interrupt
vector183: .long asm_default_interrupt
vector184: .long asm_default_interrupt
vector185: .long asm_default_interrupt
vector186: .long asm_default_interrupt
vector187: .long asm_default_interrupt
vector188: .long asm_default_interrupt
vector189: .long asm_default_interrupt
vector190: .long asm_default_interrupt
vector191: .long asm_default_interrupt
vector192: .long asm_default_interrupt
vector193: .long asm_default_interrupt
vector194: .long asm_default_interrupt
vector195: .long asm_default_interrupt
vector196: .long asm_default_interrupt
vector197: .long asm_default_interrupt
vector198: .long asm_default_interrupt
vector199: .long asm_default_interrupt
vector200: .long asm_default_interrupt
vector201: .long asm_default_interrupt
vector202: .long asm_default_interrupt
vector203: .long asm_default_interrupt
vector204: .long asm_default_interrupt
vector205: .long asm_default_interrupt
vector206: .long asm_default_interrupt
vector207: .long asm_default_interrupt
vector208: .long asm_default_interrupt
vector209: .long asm_default_interrupt
vector210: .long asm_default_interrupt
vector211: .long asm_default_interrupt
vector212: .long asm_default_interrupt
vector213: .long asm_default_interrupt
vector214: .long asm_default_interrupt
vector215: .long asm_default_interrupt
vector216: .long asm_default_interrupt
vector217: .long asm_default_interrupt
vector218: .long asm_default_interrupt
vector219: .long asm_default_interrupt
vector220: .long asm_default_interrupt
vector221: .long asm_default_interrupt
vector222: .long asm_default_interrupt
vector223: .long asm_default_interrupt
vector224: .long asm_default_interrupt
vector225: .long asm_default_interrupt
vector226: .long asm_default_interrupt
vector227: .long asm_default_interrupt
vector228: .long asm_default_interrupt
vector229: .long asm_default_interrupt
vector230: .long asm_default_interrupt
vector231: .long asm_default_interrupt
vector232: .long asm_default_interrupt
vector233: .long asm_default_interrupt
vector234: .long asm_default_interrupt
vector235: .long asm_default_interrupt
vector236: .long asm_default_interrupt
vector237: .long asm_default_interrupt
vector238: .long asm_default_interrupt
vector239: .long asm_default_interrupt
vector240: .long asm_default_interrupt
vector241: .long asm_default_interrupt
vector242: .long asm_default_interrupt
vector243: .long asm_default_interrupt
vector244: .long asm_default_interrupt
vector245: .long asm_default_interrupt
vector246: .long asm_default_interrupt
vector247: .long asm_default_interrupt
vector248: .long asm_default_interrupt
vector249: .long asm_default_interrupt
vector250: .long asm_default_interrupt
vector251: .long asm_default_interrupt
vector252: .long asm_default_interrupt
vector253: .long asm_default_interrupt
vector254: .long asm_default_interrupt
vector255: .long asm_default_interrupt
/*===============================================================*\
| Start of code |
\*===============================================================*/
.text
PUBLIC (start)
SYM(start):
move.w #0x3700,sr /* disable interrupts */
jmp start_init
/*===============================================================*\
| Sspurious interrupt counter |
\*===============================================================*/
.align 4
.data /* begin of data section */
PUBLIC (spurious_int_count)
SYM(spurious_int_count):
.long 0 /* spurious interrupt counter */
/*===============================================================*\
| Function: Default exception handler |
+-----------------------------------------------------------------+
| - stop and disable all interrupts |
| - loop forever |
\*===============================================================*/
.text /* start of text section */
.align 4
PUBLIC (asm_default_interrupt)
SYM(asm_default_interrupt):
nop
stop #0x3700 /* stop */
bra.w asm_default_interrupt /* loop forever */
/*===============================================================*\
| Function: Exception handler for spurious interrupts |
+-----------------------------------------------------------------+
| - count spurious interrupts |
\*===============================================================*/
.align 4
PUBLIC (asm_spurious_interrupt)
SYM(asm_spurious_interrupt):
add.l #1,spurious_int_count
rte
/*===============================================================*\
| Function: start_init |
+-----------------------------------------------------------------+
| - Disable all intterupts |
| - Setup the internal SRAM |
| - Initialize mcf548x peripherals |
| - Set initial stack pointer |
| - Boot RTEMS
\*===============================================================*/
.align 4
PUBLIC (start_init)
SYM(start_init):
move.l #0x01040100,d0 /* invalidate instruction/data/branch cache, disable all caches */
movec d0,cacr
move.l #_CoreSramBase0,d0 /* initialize RAMBAR0 */
add.l #0x21,d0 /* for code & data */
movec d0,rambar0
move.l #_CoreSramBase1,d0 /* initialize RAMBAR1 */
add.l #0x21,d0 /* for code & data */
movec d0,rambar1 /* movec d0,RAMBAR1 */
move.l #__MBAR,d0 /* initialize MBAR */
movec d0,mbar
move.l #_CoreSramBase1,d0 /* set sp to end of Core SRAM temporarily */
add.l #_CoreSramSize1,d0
move.l d0,sp
move.l #0,d0 /* initialize frame pointer */
movea.l d0,a6
jsr mcf548x_init /* Initialize mcf548x peripherals */
move.l #bsp_initstack_end,sp /* relocate sp */
clrl d0 /* clear d0 */
movel d0,a7@- /* command line == 0 */
jsr boot_card /* boot rtems */
movel a7@+,d0
exit_multitasking:
nop
nop
halt
bra exit_multitasking
.end /* end of start.S module */
|
