diff options
author | Joel Sherrill <joel.sherrill@OARcorp.com> | 2002-02-08 20:03:26 +0000 |
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committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 2002-02-08 20:03:26 +0000 |
commit | fb639847713fed3ed2c94e41e7f21d09cebe4af2 (patch) | |
tree | 1698f481ff266b22ee0e49b18026ca15d24f15b2 /c/src/lib/libbsp/mips/shared/gdbstub/limits.h | |
parent | 2002-02-06 Ralf Corsepius <corsepiu@faw.uni-ulm.de> (diff) | |
download | rtems-fb639847713fed3ed2c94e41e7f21d09cebe4af2.tar.bz2 |
2002-02-08 Joel Sherrill <joel@OARcorp.com>
* Merged r46kstub.c into RTEMS distribution without modification.
I got the code from Franz Fischer <Franz.Fischer@franz-fischer.de>
who had used this with an old version of RTEMS with the mips64orion
port of RTEMS. After adding this to the repository, I will tailor
this to work with the RTEMS exception processing model and trim
no longer needed parts.
* ChangeLog, gdb_if.h, ioaddr.h, limits.h, Makefile, mips_opcode.h,
r4600.h, r46kstub.c, r46kstub.ld, README, stubinit.S:
Diffstat (limited to 'c/src/lib/libbsp/mips/shared/gdbstub/limits.h')
-rw-r--r-- | c/src/lib/libbsp/mips/shared/gdbstub/limits.h | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/mips/shared/gdbstub/limits.h b/c/src/lib/libbsp/mips/shared/gdbstub/limits.h new file mode 100644 index 0000000000..05f82123e8 --- /dev/null +++ b/c/src/lib/libbsp/mips/shared/gdbstub/limits.h @@ -0,0 +1,70 @@ +/* + * limits.h - definition of machine & system dependent address limits + * + * THIS SOFTWARE IS NOT COPYRIGHTED + * + * The following software is offered for use in the public domain. + * There is no warranty with regard to this software or its performance + * and the user must accept the software "AS IS" with all faults. + * + * THE CONTRIBUTORS DISCLAIM ANY WARRANTIES, EXPRESS OR IMPLIED, WITH + * REGARD TO THIS SOFTWARE INCLUDING BUT NOT LIMITED TO THE WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + +#ifndef _LIMITS_H_ +#define _LIMITS_H_ + +/* + * The macros in this file are specific to a given implementation. + * The general rules for their construction are as follows: + * + * 1.) is_readable(addr,length) should be true if and only if the + * region starting at the given virtual address can be read + * _without_ causing an exception or other fatal error. Note + * that the stub will use the strictest alignment satisfied + * by _both_ addr and length (e.g., if both are divisible by + * 8 then the region will be read in double-word chunks). + * + * 2.) is_writeable(addr,length) should be true if and only if the + * region starting at the given virtual address can be written + * _without_ causing an exception or other fatal error. Note + * that the stub will use the strictest alignment satisfied + * by _both_ addr and length (e.g., if both are divisible by + * 8 then the region will be written in double-word chunks). + * + * 3.) is-steppable(ptr) whould be true if and only if ptr is the + * address of a writeable region of memory which may contain + * an executable instruction. At a minimum this requires that + * ptr be word-aligned (divisible by 4) and not point to EPROM + * or memory-mapped I/O. + * + * Note: in order to satisfy constraints related to cacheability + * of certain memory subsystems it may be necessary for regions + * of kseg0 and kseg1 which map to the same physical addresses + * to have different readability and/or writeability attributes. + */ + +#define K0_LIMIT_FOR_READ (K0BASE+0x18000000) +#define K1_LIMIT_FOR_READ (K1BASE+K1SIZE) + +#define is_readable(addr,length) \ + (((K0BASE <= addr) && ((addr + length) <= K0_LIMIT_FOR_READ)) \ + || ((K1BASE <= addr) && ((addr + length) <= K1_LIMIT_FOR_READ))) + +#define K0_LIMIT_FOR_WRITE (K0BASE+0x08000000) +#define K1_LIMIT_FOR_WRITE (K1BASE+0x1e000000) + +#define is_writeable(addr,length) \ + (((K0BASE <= addr) && ((addr + length) <= K0_LIMIT_FOR_WRITE)) \ + || ((K1BASE <= addr) && ((addr + length) <= K1_LIMIT_FOR_WRITE))) + +#define K0_LIMIT_FOR_STEP (K0BASE+0x08000000) +#define K1_LIMIT_FOR_STEP (K1BASE+0x08000000) + +#define is_steppable(ptr) \ + ((((int)ptr & 0x3) == 0) \ + && (((K0BASE <= (int)ptr) && ((int)ptr < K0_LIMIT_FOR_STEP)) \ + || ((K1BASE <= (int)ptr) && ((int)ptr < K1_LIMIT_FOR_STEP)))) + +#endif /* _LIMITS_H_ */ |