diff options
Diffstat (limited to 'sysdeps/standalone/m68k/m68020')
| -rw-r--r-- | sysdeps/standalone/m68k/m68020/Dist | 1 | ||||
| -rw-r--r-- | sysdeps/standalone/m68k/m68020/m68020.h | 88 | ||||
| -rw-r--r-- | sysdeps/standalone/m68k/m68020/mvme135/Implies | 2 | ||||
| -rw-r--r-- | sysdeps/standalone/m68k/m68020/mvme136/Dist | 1 | ||||
| -rw-r--r-- | sysdeps/standalone/m68k/m68020/mvme136/Makefile | 22 | ||||
| -rw-r--r-- | sysdeps/standalone/m68k/m68020/mvme136/_exit.c | 49 | ||||
| -rw-r--r-- | sysdeps/standalone/m68k/m68020/mvme136/brdinit.c | 53 | ||||
| -rw-r--r-- | sysdeps/standalone/m68k/m68020/mvme136/console.c | 101 | ||||
| -rw-r--r-- | sysdeps/standalone/m68k/m68020/mvme136/mvme136.ld | 62 | ||||
| -rw-r--r-- | sysdeps/standalone/m68k/m68020/start.S | 155 |
10 files changed, 534 insertions, 0 deletions
diff --git a/sysdeps/standalone/m68k/m68020/Dist b/sysdeps/standalone/m68k/m68020/Dist new file mode 100644 index 0000000000..90b37b40eb --- /dev/null +++ b/sysdeps/standalone/m68k/m68020/Dist @@ -0,0 +1 @@ +m68020.h diff --git a/sysdeps/standalone/m68k/m68020/m68020.h b/sysdeps/standalone/m68k/m68020/m68020.h new file mode 100644 index 0000000000..e9e6f7d875 --- /dev/null +++ b/sysdeps/standalone/m68k/m68020/m68020.h @@ -0,0 +1,88 @@ +/* Copyright (C) 1994 Free Software Foundation, Inc. + Contributed by Joel Sherrill (jsherril@redstone-emh2.army.mil), + On-Line Applications Research Corporation. + +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +/* m68020.h + * + * This file contains macros which are used to access MC68020 + * registers which are not addressable by C. These are + * useful when developing the board specific support. + */ + +#ifndef m68020_h__ +#define m68020_h__ + +typedef void ( *mc68020_isr )( void ); + +#define disable_intr( level ) \ + { (level) = 0; \ + asm volatile ( "movew %%sr,%0 ; \ + orw #0x0700,%%sr" \ + : "=d" ((level)) : "0" ((level)) ); \ + } + +#define enable_intr( level ) \ + { asm volatile ( "movew %0,%%sr " \ + : "=d" ((level)) : "0" ((level)) ); \ + } + +#define flash_intr( level ) \ + { asm volatile ( "movew %0,%%sr ; \ + orw #0x0700,%%sr" \ + : "=d" ((level)) : "0" ((level)) ); \ + } + +#define get_vbr( vbr ) \ + { (vbr) = 0; \ + asm volatile ( "movec %%vbr,%0 " \ + : "=a" (vbr) : "0" (vbr) ); \ + } + +#define set_vbr( vbr ) \ + { register mc68020_isr *_vbr= (mc68020_isr *)(vbr); \ + asm volatile ( "movec %0,%%vbr " \ + : "=a" (_vbr) : "0" (_vbr) ); \ + } + +#define enable_caching() \ + { register unsigned int _ctl=0x01; \ + asm volatile ( "movec %0,%%cacr" \ + : "=d" (_ctl) : "0" (_ctl) ); \ + } + +#define delay( microseconds ) \ + { register unsigned int _delay=(microseconds); \ + register unsigned int _tmp=123; \ + asm volatile( "0: \ + nbcd %0 ; \ + nbcd %0 ; \ + dbf %1,0 " \ + : "=d" (_tmp), "=d" (_delay) \ + : "0" (_tmp), "1" (_delay) ); \ + } + +#define enable_tracing() +#define cause_intr( X ) +#define clear_intr( X ) + +extern mc68020_isr M68Kvec[]; /* vector table address */ + +#endif +/* end of include file */ diff --git a/sysdeps/standalone/m68k/m68020/mvme135/Implies b/sysdeps/standalone/m68k/m68020/mvme135/Implies new file mode 100644 index 0000000000..7142fe2985 --- /dev/null +++ b/sysdeps/standalone/m68k/m68020/mvme135/Implies @@ -0,0 +1,2 @@ +# Motorola MVME135 and MVME136 are compatible. +standalone/m68k/m68020/mvme136 diff --git a/sysdeps/standalone/m68k/m68020/mvme136/Dist b/sysdeps/standalone/m68k/m68020/mvme136/Dist new file mode 100644 index 0000000000..97b90583eb --- /dev/null +++ b/sysdeps/standalone/m68k/m68020/mvme136/Dist @@ -0,0 +1 @@ +mvme136.ld diff --git a/sysdeps/standalone/m68k/m68020/mvme136/Makefile b/sysdeps/standalone/m68k/m68020/mvme136/Makefile new file mode 100644 index 0000000000..33f049c58c --- /dev/null +++ b/sysdeps/standalone/m68k/m68020/mvme136/Makefile @@ -0,0 +1,22 @@ +# Copyright (C) 1993 Free Software Foundation, Inc. +# Contributed by Joel Sherrill (jsherril@redstone-emh2.army.mil), +# On-Line Applications Research Corporation. + +# The GNU C Library is free software; you can redistribute it and/or +# modify it under the terms of the GNU Library General Public License +# as published by the Free Software Foundation; either version 2 of +# the License, or (at your option) any later version. + +# The GNU C Library is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# Library General Public License for more details. + +# You should have received a copy of the GNU Library General Public +# License along with the GNU C Library; see the file COPYING.LIB. If +# not, write to the Free Software Foundation, Inc., 675 Mass Ave, +# Cambridge, MA 02139, USA. + +ifeq (bare,$(subdir)) +install-lib += mvme136.ld +endif diff --git a/sysdeps/standalone/m68k/m68020/mvme136/_exit.c b/sysdeps/standalone/m68k/m68020/mvme136/_exit.c new file mode 100644 index 0000000000..d13b4d9770 --- /dev/null +++ b/sysdeps/standalone/m68k/m68020/mvme136/_exit.c @@ -0,0 +1,49 @@ +/* Copyright (C) 1994 Free Software Foundation, Inc. + Contributed by Joel Sherrill (jsherril@redstone-emh2.army.mil), + On-Line Applications Research Corporation. + +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include <ansidecl.h> +#include <unistd.h> +#include <stdlib.h> +#include "m68020.h" + +/* Return control to 135Bug */ + +void +DEFUN_VOID(__exit_trap) +{ + set_vbr( 0 ); /* restore 135Bug vectors */ + asm volatile( "trap #15" ); /* trap to 135Bug */ + asm volatile( ".short 0x63" ); /* return to 135Bug (.RETURN) */ + asm volatile( "jmp main" ); /* restart program */ +} + +/* The function `_exit' should take a status argument and simply + terminate program execution, using the low-order 8 bits of the + given integer as status. */ + +__NORETURN void +DEFUN(_exit, (status), int status) +{ + /* status is ignored */ + + M68Kvec[ 45 ] = __exit_trap; /* install exit_trap handler */ + asm volatile( "trap #13" ); /* insures SUPV mode */ +} diff --git a/sysdeps/standalone/m68k/m68020/mvme136/brdinit.c b/sysdeps/standalone/m68k/m68020/mvme136/brdinit.c new file mode 100644 index 0000000000..0c4801a49b --- /dev/null +++ b/sysdeps/standalone/m68k/m68020/mvme136/brdinit.c @@ -0,0 +1,53 @@ +/* Copyright (C) 1994 Free Software Foundation, Inc. + Contributed by Joel Sherrill (jsherril@redstone-emh2.army.mil), + On-Line Applications Research Corporation. + +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include <ansidecl.h> +#include <standalone.h> +#include "m68020.h" + +/* _Board_Initialize() + +This routine initializes the Motorola MVME135/MVME136. */ + +void +DEFUN_VOID(_Board_Initialize) +{ + mc68020_isr *monitors_vector_table; + int index; + + monitors_vector_table = (mc68020_isr *)0; /* 135Bug Vectors are at 0 */ + set_vbr( monitors_vector_table ); + + for ( index=2 ; index<=255 ; index++ ) + M68Kvec[ index ] = monitors_vector_table[ 32 ]; + + M68Kvec[ 2 ] = monitors_vector_table[ 2 ]; /* bus error vector */ + M68Kvec[ 4 ] = monitors_vector_table[ 4 ]; /* breakpoints vector */ + M68Kvec[ 9 ] = monitors_vector_table[ 9 ]; /* trace vector */ + M68Kvec[ 47 ] = monitors_vector_table[ 47 ]; /* system call vector */ + + set_vbr( &M68Kvec ); + + (*(unsigned char *)0xfffb0067) = 0x7f; /* make VME access round-robin */ + + enable_caching(); + +} diff --git a/sysdeps/standalone/m68k/m68020/mvme136/console.c b/sysdeps/standalone/m68k/m68020/mvme136/console.c new file mode 100644 index 0000000000..159070bab9 --- /dev/null +++ b/sysdeps/standalone/m68k/m68020/mvme136/console.c @@ -0,0 +1,101 @@ +/* Copyright (C) 1994 Free Software Foundation, Inc. + Contributed by Joel Sherrill (jsherril@redstone-emh2.army.mil), + On-Line Applications Research Corporation. + +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include <ansidecl.h> +#include <standalone.h> +#include "m68020.h" + +/* Console IO routines for a Motorola MVME135/MVME136 board. + +They currently use the B port. It should be possible to +use the A port by filling in the reset of the chip structure, +adding an ifdef for PORTA/PORTB, and switching the addresses, +and maybe the macroes based on the macro. */ + +/* M68681 DUART chip register structures and constants */ + +typedef struct { + volatile unsigned char fill1[ 5 ]; /* channel A regs ( not used ) */ + volatile unsigned char isr; /* interrupt status reg */ + volatile unsigned char fill2[ 2 ]; /* counter regs (not used) */ + volatile unsigned char mr1mr2b; /* MR1B and MR2B regs */ + volatile unsigned char srb; /* status reg channel B */ + volatile unsigned char fill3; /* do not access */ + volatile unsigned char rbb; /* receive buffer channel B */ + volatile unsigned char ivr; /* interrupt vector register */ +} r_m681_info; + +typedef struct { + volatile unsigned char fill1[ 4 ]; /* channel A regs (not used) */ + volatile unsigned char acr; /* auxillary control reg */ + volatile unsigned char imr; /* interrupt mask reg */ + volatile unsigned char fill2[ 2 ]; /* counter regs (not used) */ + volatile unsigned char mr1mr2b; /* MR1B and MR2B regs */ + volatile unsigned char csrb; /* clock select reg */ + volatile unsigned char crb; /* command reg */ + volatile unsigned char tbb; /* transmit buffer channel B */ + volatile unsigned char ivr; /* interrupt vector register */ +} w_m681_info; + +#define RD_M68681 ((r_m681_info *)0xfffb0040) /* ptr to the M68681 */ +#define WR_M68681 ((w_m681_info *)0xfffb0040) /* ptr to the M68681 */ +#define RXRDYB 0x01 /* status reg recv ready mask */ +#define TXRDYB 0x04 /* status reg trans ready mask */ + +/* _Console_Putc + +This routine transmits a character out the M68681. It supports +XON/XOFF flow control. */ + +#define XON 0x11 /* control-Q */ +#define XOFF 0x13 /* control-S */ + +int +DEFUN( _Console_Putc, (ch), char ch ) +{ + while ( ! (RD_M68681->srb & TXRDYB) ) ; + while ( RD_M68681->srb & RXRDYB ) /* must be an XOFF */ + if ( RD_M68681->rbb == XOFF ) + do { + while ( ! (RD_M68681->srb & RXRDYB) ) ; + } while ( RD_M68681->rbb != XON ); + + WR_M68681->tbb = ch; + return( 0 ); +} + +/* _Console_Getc + +This routine reads a character from the UART and returns it. */ + +int +DEFUN( _Console_Getc, (poll), int poll ) +{ + if ( poll ) { + if ( !(RD_M68681->srb & RXRDYB) ) + return -1; + else + return RD_M68681->rbb; + } else { + while ( !(RD_M68681->srb & RXRDYB) ); + return RD_M68681->rbb; + } +} diff --git a/sysdeps/standalone/m68k/m68020/mvme136/mvme136.ld b/sysdeps/standalone/m68k/m68020/mvme136/mvme136.ld new file mode 100644 index 0000000000..0f68330241 --- /dev/null +++ b/sysdeps/standalone/m68k/m68020/mvme136/mvme136.ld @@ -0,0 +1,62 @@ +/* Copyright (C) 1994 Free Software Foundation, Inc. + Contributed by Joel Sherrill (jsherril@redstone-emh2.army.mil), + On-Line Applications Research Corporation. + +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +/* This file contains directives for the GNU linker which are specific +to the Motorola MVME136/MVME135 boards. */ + +MEMORY + { + ram : org = 0x3000, l = 1M + } + +/* This value is also when the space is allocated. If you change +this one, change the other one!!! */ + +heap_size = 0x20000; + +SECTIONS +{ + .text 0x3000 : + { + text_start = ABSOLUTE(.) ; + *(.text) + etext = ALIGN( 0x10 ) ; + } + + .data ADDR( .text ) + SIZEOF( .text ): + { + data_start = . ; + *(.data) + edata = ALIGN( 0x10 ) ; + } + + .bss ADDR( .data ) + SIZEOF( .data ): + { + bss_start = . ; + _bss_start = . ; + *(.bss) + *(COMMON) + heap_memory = .; + . += 0x20000; + end = . ; + _end = . ; + } +} diff --git a/sysdeps/standalone/m68k/m68020/start.S b/sysdeps/standalone/m68k/m68020/start.S new file mode 100644 index 0000000000..cbabf5bf07 --- /dev/null +++ b/sysdeps/standalone/m68k/m68020/start.S @@ -0,0 +1,155 @@ +/* Copyright (C) 1994 Free Software Foundation, Inc. + Contributed by Joel Sherrill (jsherril@redstone-emh2.army.mil), + On-Line Applications Research Corporation. + +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +/* entry.s + * + * This file contains the entry point for the application. + * The name of this entry point is compiler dependent. + * It jumps to the BSP which is responsible for performing + * all initialization. + */ + + .text + .globl start | Default entry point + .globl _start | Default entry point + .globl M68Kvec | Vector Table + .globl _M68Kvec | Vector Table + +start: +_start: +M68Kvec: | standard location for vectors +_M68Kvec: | standard location for vectors + nop | for linkers with problem + | using location zero as entry + jmp around + .space 4088 | to avoid initial intr stack + | from 135BUG on MVME13? as entry + | and start code at 0x4000 +around: + move.w %sr,initial_sr | save initial values + movec %isp,%a0 + movel %a0,initial_isp + movec %usp,%a0 + movel %a0,initial_usp + movec %msp,%a0 + movel %a0,initial_msp + oriw #0x0700,%sr | INTERRUPTS OFF!!! + + + + | + | zero out uninitialized data area + | +zerobss: + moveal #end,%a0 | find end of .bss + moveal #_bss_start,%a1 | find beginning of .bss + movel #0,%d0 + +loop: movel #0,%a1@+ | to zero out uninitialized + cmpal %a0,%a1 + jlt loop | loop until _end reached + + movel #heap_size,__C_heap_size | set ___C_heap_size + movel #heap_memory,__C_heap_start | set ___C_heap_start + moveal #interrupt_stack_end,%a0 | set interrupt stack pointer + movec %a0,%isp + moveal #stack_end,%a0 | set master stack pointer + movec %a0,%msp + moveal #stack_end,%a6 | set base pointer + movw #0x3000,%sr | SUPV MODE,INTERRUPTS ON!!! + +#ifdef NEED_UNDERSCORES + jsr __Board_Initialize | initialize the board +#else + jsr _Board_Initialize | initialize the board +#endif + + move.l #0,%sp@- | envp = NULL + move.l #0,%sp@- | argv = NULL + move.l #0,%sp@- | argc = NULL +#ifdef NEED_UNDERSCORES + jsr ___libc_init | initialize the library and + | call main +#else + jsr __libc_init | initialize the library and + | call main +#endif + add.l #12,%sp + + move.l #0,%sp@- | argc = NULL + jsr __exit | call the Board specific exit + addq.l #4,%sp + + move.l initial_isp,%a0 | if __exit returns then we can + movec %a0,%isp | restore the initial values + move.l initial_usp,%a0 + movec %a0,%usp + move.l initial_msp,%a0 + movec %a0,%msp + move.w initial_sr,%sr + rts + + + .bss + +/* + * So initial stack registers and status register can be saved. + */ + +#define DECLARE_SPACE(_name,_space,_align) \ + .globl _name ; \ + .align _align ; \ +_name##: .space _space + +#define DECLARE_LABEL(_name) \ + .globl _name ; \ +_name##: + +#define DECLARE_PTR(_name) DECLARE_SPACE(_name,4,2) +#define DECLARE_U32(_name) DECLARE_SPACE(_name,4,2) +#define DECLARE_U16(_name) DECLARE_SPACE(_name,2,1) + +DECLARE_U32(initial_isp) +DECLARE_U32(initial_msp) +DECLARE_U32(initial_usp) +DECLARE_U16(initial_sr) + +/* + * Require environment stuff + */ + +DECLARE_LABEL(_environ) +DECLARE_PTR(environ) + +DECLARE_LABEL(_errno) +DECLARE_U32(errno) + +/* + * Stack Size and Space + */ + + .set stack_size, 0x20000 + +DECLARE_SPACE(stack_memory,stack_size,4) +DECLARE_LABEL(stack_end) + +DECLARE_SPACE(interrupt_stack_memory,0x1000,4) +DECLARE_LABEL(interrupt_stack_end) |