diff options
Diffstat (limited to 'sysdeps/standalone/i960')
| -rw-r--r-- | sysdeps/standalone/i960/Dist | 1 | ||||
| -rw-r--r-- | sysdeps/standalone/i960/i960ca.h | 207 | ||||
| -rw-r--r-- | sysdeps/standalone/i960/nindy960/Makefile | 23 | ||||
| -rw-r--r-- | sysdeps/standalone/i960/nindy960/_exit.c | 55 | ||||
| -rw-r--r-- | sysdeps/standalone/i960/nindy960/brdinit.c | 66 | ||||
| -rw-r--r-- | sysdeps/standalone/i960/nindy960/console.c | 76 | ||||
| -rw-r--r-- | sysdeps/standalone/i960/start.S | 137 |
7 files changed, 565 insertions, 0 deletions
diff --git a/sysdeps/standalone/i960/Dist b/sysdeps/standalone/i960/Dist new file mode 100644 index 0000000000..e1747ef91e --- /dev/null +++ b/sysdeps/standalone/i960/Dist @@ -0,0 +1 @@ +i960ca.h diff --git a/sysdeps/standalone/i960/i960ca.h b/sysdeps/standalone/i960/i960ca.h new file mode 100644 index 0000000000..21012b4ccc --- /dev/null +++ b/sysdeps/standalone/i960/i960ca.h @@ -0,0 +1,207 @@ +/* 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. */ + +/* i960ca.h + * + * This file contains macros which are used to access i80960CA + * registers which are not addressable by C. The functions + * in this file sould be useful to the developer of target + * specific code. + */ + +#ifndef i960ca_h__ +#define i960ca_h__ + +typedef unsigned char unsigned8; +typedef unsigned short unsigned16; +typedef unsigned int unsigned32; + +/* + * Intel i80960CA Processor Control Block + */ + +struct i80960ca_prcb { + unsigned32 *fault_tbl; /* fault table base address */ + struct i80960ca_ctltbl + *control_tbl; /* control table base address */ + unsigned32 initial_ac; /* AC register initial value */ + unsigned32 fault_config; /* fault configuration word */ + void *intr_tbl; /* interrupt table base address */ + void *sys_proc_tbl; /* system procedure table */ + /* base address */ + unsigned32 reserved; /* reserved */ + unsigned32 *intr_stack; /* interrupt stack pointer */ + unsigned32 ins_cache_cfg; /* instruction cache */ + /* configuration word */ + unsigned32 reg_cache_cfg; /* register cache */ + /* configuration word */ +}; + +/* + * Intel i80960CA Control Table + */ + +struct i80960ca_ctltbl { + /* Control Group 0 */ + unsigned32 ipb0; /* IP breakpoint 0 */ + unsigned32 ipb1; /* IP breakpoint 1 */ + unsigned32 dab0; /* data address breakpoint 0 */ + unsigned32 dab1; /* data address breakpoint 1 */ + /* Control Group 1 */ + unsigned32 imap0; /* interrupt map 0 */ + unsigned32 imap1; /* interrupt map 1 */ + unsigned32 imap2; /* interrupt map 2 */ + unsigned32 icon; /* interrupt control */ + /* Control Group 2 */ + unsigned32 mcon0; /* memory region 0 configuration */ + unsigned32 mcon1; /* memory region 1 configuration */ + unsigned32 mcon2; /* memory region 2 configuration */ + unsigned32 mcon3; /* memory region 3 configuration */ + /* Control Group 3 */ + unsigned32 mcon4; /* memory region 4 configuration */ + unsigned32 mcon5; /* memory region 5 configuration */ + unsigned32 mcon6; /* memory region 6 configuration */ + unsigned32 mcon7; /* memory region 7 configuration */ + /* Control Group 4 */ + unsigned32 mcon8; /* memory region 8 configuration */ + unsigned32 mcon9; /* memory region 9 configuration */ + unsigned32 mcon10; /* memory region 10 configuration */ + unsigned32 mcon11; /* memory region 11 configuration */ + /* Control Group 5 */ + unsigned32 mcon12; /* memory region 12 configuration */ + unsigned32 mcon13; /* memory region 13 configuration */ + unsigned32 mcon14; /* memory region 14 configuration */ + unsigned32 mcon15; /* memory region 15 configuration */ + /* Control Group 6 */ + unsigned32 bpcon; /* breakpoint control */ + unsigned32 tc; /* trace control */ + unsigned32 bcon; /* bus configuration control */ + unsigned32 reserved; /* reserved */ +}; + +#define disable_intr( oldlevel ) \ + { (oldlevel) = 0x1f0000; \ + asm volatile ( "modpc 0,%1,%1" \ + : "=d" ((oldlevel)) \ + : "0" ((oldlevel)) ); \ + } + +#define enable_intr( oldlevel ) \ + { unsigned32 _mask = 0x1f0000; \ + asm volatile ( "modpc 0,%0,%1" \ + : "=d" (_mask), "=d" ((oldlevel)) \ + : "0" (_mask), "1" ((oldlevel)) ); \ + } + +#define flash_intr( oldlevel ) \ + { unsigned32 _mask = 0x1f0000; \ + asm volatile ( "modpc 0,%0,%1 ; \ + mov %0,%1 ; \ + modpc 0,%0,%1" \ + : "=d" (_mask), "=d" ((oldlevel)) \ + : "0" (_mask), "1" ((oldlevel)) ); \ + } + +#define atomic_modify( mask, addr, prev ) \ + { register unsigned32 _mask = (mask); \ + register unsigned32 *_addr = (unsigned32 *)(addr); \ + asm volatile( "atmod %0,%1,%1" \ + : "=d" (_addr), "=d" (_mask) \ + : "0" (_addr), "1" (_mask) ); \ + (prev) = _mask; \ + } + +#define delay( microseconds ) \ + { register unsigned32 _delay=(microseconds); \ + register unsigned32 _tmp; \ + asm volatile( "delay0: \ + remo 3,31,%0 ; \ + cmpo 0,%0 ; \ + subo 1,%1,%1 ; \ + cmpobne.t 0,%1,delay0 " \ + : "=d" (_tmp), "=d" (_delay) \ + : "0" (_tmp), "1" (_delay) ); \ + } + +#define enable_tracing() \ + { register unsigned32 _pc = 0x1; \ + asm volatile( "modpc 0,%0,%0" : "=d" (_pc) : "0" (_pc) ); \ + } + +#define unmask_intr( xint ) \ + { register unsigned32 _mask= (1<<(xint)); \ + asm volatile( "or sf1,%0,sf1" : "=d" (_mask) : "0" (_mask) ); \ + } + +#define mask_intr( xint ) \ + { register unsigned32 _mask= (1<<(xint)); \ + asm volatile( "andnot %0,sf1,sf1" : "=d" (_mask) : "0" (_mask) ); \ + } + +#define clear_intr( xint ) \ + { register unsigned32 _xint=(xint); \ + asm volatile( "loop_til_cleared: + clrbit %0,sf0,sf0 ; \ + bbs %0,sf0,loop_til_cleared" \ + : "=d" (_xint) : "0" (_xint) ); \ + } + +#define reload_ctl_group( group ) \ + { register int _cmd = ((group)|0x400) ; \ + asm volatile( "sysctl %0,%0,%0" : "=d" (_cmd) : "0" (_cmd) ); \ + } + +#define cause_intr( intr ) \ + { register int _intr = (intr); \ + asm volatile( "sysctl %0,%0,%0" : "=d" (_intr) : "0" (_intr) ); \ + } + +#define soft_reset( prcb ) \ + { register struct i80960ca_prcb *_prcb = (prcb); \ + register unsigned32 *_next=0; \ + register unsigned32 _cmd = 0x30000; \ + asm volatile( "lda next,%1; \ + sysctl %0,%1,%2; \ + next: mov g0,g0" \ + : "=d" (_cmd), "=d" (_next), "=d" (_prcb) \ + : "0" (_cmd), "1" (_next), "2" (_prcb) ); \ + } + +static inline unsigned32 pend_intrs() +{ register unsigned32 _intr=0; + asm volatile( "mov sf0,%0" : "=d" (_intr) : "0" (_intr) ); + return ( _intr ); +} + +static inline unsigned32 mask_intrs() +{ register unsigned32 _intr=0; + asm volatile( "mov sf1,%0" : "=d" (_intr) : "0" (_intr) ); + return( _intr ); +} + +static inline unsigned32 get_fp() +{ register unsigned32 _fp=0; + asm volatile( "mov fp,%0" : "=d" (_fp) : "0" (_fp) ); + return ( _fp ); +} + +#endif +/* end of include file */ diff --git a/sysdeps/standalone/i960/nindy960/Makefile b/sysdeps/standalone/i960/nindy960/Makefile new file mode 100644 index 0000000000..e6e65ea064 --- /dev/null +++ b/sysdeps/standalone/i960/nindy960/Makefile @@ -0,0 +1,23 @@ +# 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. + + +# The nindy960 support has only been tested on the following boards: +# +# + Cyclone CVME961 VMEbus single board computer. diff --git a/sysdeps/standalone/i960/nindy960/_exit.c b/sysdeps/standalone/i960/nindy960/_exit.c new file mode 100644 index 0000000000..33553a7a2c --- /dev/null +++ b/sysdeps/standalone/i960/nindy960/_exit.c @@ -0,0 +1,55 @@ +/* Copyright (C) 1991 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> + +/* 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. */ + +/* This returns control to Nindy. */ + +__NORETURN void +DEFUN(_exit, (status), int status) +{ + /* status is ignored */ + + asm volatile( "mov 0,g0; \ + fmark ; \ + syncf ; \ + .word 0xfeedface ; \ + bx start" : : ); + /* The constant 0xfeedface is a magic word for break which + * is defined by NINDY. The branch extended restarts the + * application if the user types "go". + */ +} + + +#ifdef HAVE_GNU_LD + +#include <gnu-stabs.h> + +stub_warning(_exit); + +#endif /* GNU stabs. */ diff --git a/sysdeps/standalone/i960/nindy960/brdinit.c b/sysdeps/standalone/i960/nindy960/brdinit.c new file mode 100644 index 0000000000..c16adcd390 --- /dev/null +++ b/sysdeps/standalone/i960/nindy960/brdinit.c @@ -0,0 +1,66 @@ +/* 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 "i960ca.h" + +/* _Board_Initialize() + +This routine initializes the board. + +NOTE: Only tested on a Cyclone CVME961 but should be OK on any i960ca board. */ + +void +DEFUN_VOID(_Board_Initialize) +{ + struct i80960ca_prcb *prcb; /* ptr to processor control block */ + struct i80960ca_ctltbl *ctl_tbl; /* ptr to control table */ + + static inline struct i80960ca_prcb *get_prcb() + { register struct i80960ca_prcb *_prcb = 0; + asm volatile( "calls 5; \ + mov g0,%0" \ + : "=d" (_prcb) \ + : "0" (_prcb) ); + return ( _prcb ); + } + + prcb = get_prcb(); + ctl_tbl = prcb->control_tbl; + + /* The following configures the data breakpoint (which must be set + * before this is executed) to break on writes only. + */ + + ctl_tbl->bpcon &= ~0x00cc0000; + reload_ctl_group( 6 ); + + /* bit 31 of the Register Cache Control can be set to + * enable an alternative caching algorithm. It does + * not appear to help our applications. + */ + + /* Configure Number of Register Caches */ + + prcb->reg_cache_cfg = 8; + soft_reset( prcb ); +} diff --git a/sysdeps/standalone/i960/nindy960/console.c b/sysdeps/standalone/i960/nindy960/console.c new file mode 100644 index 0000000000..821514458a --- /dev/null +++ b/sysdeps/standalone/i960/nindy960/console.c @@ -0,0 +1,76 @@ +/* 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 "i960ca.h" + +/* Console IO routines for a NINDY960 board. */ + +/* + * NINDY_IO( ... ) + * + * Interface to NINDY. + */ + +#define NINDY_INPUT 0 +#define NINDY_OUTPUT 1 + +void ___NINDY_IO_WRAPPER( void ) /* never called */ +{ + asm volatile ( " .text" ); + asm volatile ( " .align 4" ); + asm volatile ( " .globl _NINDY_IO" ); + asm volatile ( "_NINDY_IO:" ); + asm volatile ( " calls 0 /* call console routines */" ); + asm volatile ( " ret" ); +} + +/***** !!!! HOW DO I EXFUN NINDY_IO? !!!! *****/ + +/* _Console_Putc + +This routine transmits a character using NINDY. */ + +int +DEFUN( _Console_Putc, (ch), char ch ) +{ + NINDY_IO( NINDY_OUTPUT, ch ); + return( 0 ); +} + +/* _Console_Getc + +This routine reads a character from NINDY and returns it. */ + +int +DEFUN( _Console_Getc, (poll), int poll ) +{ + char ch; + + if ( poll ) { + /* I don't know how to poll with NINDY */ + return -1; + } else { + NINDY_IO( NINDY_INPUT, &ch ); + return ch; + } +} diff --git a/sysdeps/standalone/i960/start.S b/sysdeps/standalone/i960/start.S new file mode 100644 index 0000000000..c14449d3ff --- /dev/null +++ b/sysdeps/standalone/i960/start.S @@ -0,0 +1,137 @@ +/* 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 # GNU960 default entry point + +start: + mov 3, r12 + modpc r12, r12, r12 # enable tracing/trace faults + mov g5, g5 # NOP + mov 0, g14 # initialize constant for C + + /* + * zero out uninitialized data area + */ +zerobss: + lda _end, r4 /* find end of .bss */ + lda _bss_start, r5 /* find beginning of .bss */ + ldconst 0, r6 + +loop: st r6, (r5) /* to zero out uninitialized */ + addo 4, r5, r5 /* data area */ + cmpobl r5, r4, loop /* loop until _end reached */ + + + lda heap_memory, r12 /* tell C lib where heap is */ + st r12,___C_heap_start + lda heap_size, r12 /* tell C lib how big heap is */ + st r12,___C_heap_size + lda stack_memory,r12 /* set up stack pointer: */ + mov r12, sp + mov 0, g14 /* initialize constant for C */ + + call init_frames + ret /* return to monitor */ + +init_frames: + ldconst 0x3b001000, g0 + ldconst 0x00009107, g1 + modac g1, g0, g0 /* set AC controls */ + + /* + * Call application mainline. + * Someday, real values of argc and argv will be set up. + * For now, they are set to 0. + */ + + callx __Board_Initialize /* Initialize the board */ + + ldconst 0,g0 + ldconst 0,g1 + ldconst 0,g2 + callx ___libc_init /* initialize the library and */ + /* call main */ + /* + * if we return from main, we have "fallen" off the end + * of the program, therefore status is 0 + * so move 0 to g0 (exit parameter) + */ + + mov 0, g0 + callx __exit + ret + + +/* + * Data Declarations. Start with a macro which helps declare space. + */ + +#define DECLARE_SPACE(_name,_space,_align) \ + .globl _name ; \ + .align _align ; \ +.comm _name##,_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) + +/* + * 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) + +/* + * Heap Size and Space + */ + + .set heap_size, 0x20000 + +DECLARE_SPACE(heap_memory,heap_size,4) +DECLARE_LABEL(heap_end) + |