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Initial creation of sourceware repository
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Stan Shebs
225
gdb/testsuite/gdb.base/m32rovly.c
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225
gdb/testsuite/gdb.base/m32rovly.c
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/*
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* Ovlymgr.c -- Runtime Overlay Manager for the GDB testsuite.
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*/
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#include "ovlymgr.h"
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/* Local functions and data: */
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extern unsigned long _ovly_table[][4];
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extern unsigned long _novlys __attribute__ ((section (".data")));
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enum ovly_index { VMA, SIZE, LMA, MAPPED};
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static void ovly_copy (unsigned long dst, unsigned long src, long size);
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/* Flush the data and instruction caches at address START for SIZE bytes.
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Support for each new port must be added here. */
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/* FIXME: Might be better to have a standard libgloss function that
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ports provide that we can then use. Use libgloss instead of newlib
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since libgloss is the one intended to handle low level system issues.
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I would suggest something like _flush_cache to avoid the user's namespace
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but not be completely obscure as other things may need this facility. */
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static void
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FlushCache (void)
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{
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#ifdef __M32R__
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volatile char *mspr = (char *) 0xfffffff7;
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*mspr = 1;
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#endif
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}
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/* OverlayLoad:
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* Copy the overlay into its runtime region,
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* and mark the overlay as "mapped".
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*/
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bool
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OverlayLoad (unsigned long ovlyno)
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{
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unsigned long i;
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if (ovlyno < 0 || ovlyno >= _novlys)
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exit (-1); /* fail, bad ovly number */
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if (_ovly_table[ovlyno][MAPPED])
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return TRUE; /* this overlay already mapped -- nothing to do! */
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for (i = 0; i < _novlys; i++)
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if (i == ovlyno)
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_ovly_table[i][MAPPED] = 1; /* this one now mapped */
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else if (_ovly_table[i][VMA] == _ovly_table[ovlyno][VMA])
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_ovly_table[i][MAPPED] = 0; /* this one now un-mapped */
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ovly_copy (_ovly_table[ovlyno][VMA],
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_ovly_table[ovlyno][LMA],
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_ovly_table[ovlyno][SIZE]);
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FlushCache ();
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return TRUE;
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}
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/* OverlayUnload:
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* Copy the overlay back into its "load" region.
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* Does NOT mark overlay as "unmapped", therefore may be called
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* more than once for the same mapped overlay.
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*/
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bool
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OverlayUnload (unsigned long ovlyno)
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{
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if (ovlyno < 0 || ovlyno >= _novlys)
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exit (-1); /* fail, bad ovly number */
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if (!_ovly_table[ovlyno][MAPPED])
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exit (-1); /* error, can't copy out a segment that's not "in" */
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ovly_copy (_ovly_table[ovlyno][LMA],
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_ovly_table[ovlyno][VMA],
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_ovly_table[ovlyno][SIZE]);
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return TRUE;
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}
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#ifdef __D10V__
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#define IMAP0 (*(short *)(0xff00))
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#define IMAP1 (*(short *)(0xff02))
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#define DMAP (*(short *)(0xff04))
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static void
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D10VTranslate (unsigned long logical,
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short *dmap,
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unsigned long **addr)
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{
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unsigned long physical;
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unsigned long seg;
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unsigned long off;
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/* to access data, we use the following mapping
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0x00xxxxxx: Logical data address segment (DMAP translated memory)
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0x01xxxxxx: Logical instruction address segment (IMAP translated memory)
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0x10xxxxxx: Physical data memory segment (On-chip data memory)
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0x11xxxxxx: Physical instruction memory segment (On-chip insn memory)
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0x12xxxxxx: Phisical unified memory segment (Unified memory)
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*/
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/* Addresses must be correctly aligned */
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if (logical & (sizeof (**addr) - 1))
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exit (-1);
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/* If the address is in one of the two logical address spaces, it is
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first translated into a physical address */
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seg = (logical >> 24);
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off = (logical & 0xffffffL);
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switch (seg)
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{
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case 0x00: /* in logical data address segment */
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if (off <= 0x7fffL)
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physical = (0x10L << 24) + off;
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else
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/* Logical address out side of on-chip segment, not
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supported */
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exit (-1);
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break;
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case 0x01: /* in logical instruction address segment */
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{
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short map;
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if (off <= 0x1ffffL)
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map = IMAP0;
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else if (off <= 0x3ffffL)
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map = IMAP1;
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else
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/* Logical address outside of IMAP[01] segment, not
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supported */
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exit (-1);
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if (map & 0x1000L)
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{
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/* Instruction memory */
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physical = (0x11L << 24) | off;
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}
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else
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{
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/* Unified memory */
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physical = ((map & 0x7fL) << 17) + (off & 0x1ffffL);
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if (physical > 0xffffffL)
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/* Address outside of unified address segment */
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exit (-1);
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physical |= (0x12L << 24);
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}
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break;
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}
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case 0x10:
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case 0x11:
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case 0x12:
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physical = logical;
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break;
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default:
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exit (-1); /* error */
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}
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seg = (physical >> 24);
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off = (physical & 0xffffffL);
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switch (seg)
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{
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case 0x10: /* dst is a 15 bit offset into the on-chip memory */
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*dmap = 0;
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*addr = (long *) (0x0000 + ((short)off & 0x7fff));
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break;
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case 0x11: /* dst is an 18-bit offset into the on-chip
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instruction memory */
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*dmap = 0x1000L | ((off & 0x3ffffL) >> 14);
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*addr = (long *) (0x8000 + ((short)off & 0x3fff));
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break;
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case 0x12: /* dst is a 24-bit offset into unified memory */
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*dmap = off >> 14;
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*addr = (long *) (0x8000 + ((short)off & 0x3fff));
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break;
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default:
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exit (-1); /* error */
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}
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}
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#endif /* __D10V__ */
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static void
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ovly_copy (unsigned long dst, unsigned long src, long size)
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{
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#ifdef __M32R__
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memcpy ((void *) dst, (void *) src, size);
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return;
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#endif /* M32R */
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#ifdef __D10V__
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unsigned long *s, *d, tmp;
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short dmap_src, dmap_dst;
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short dmap_save;
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/* all section sizes should by multiples of 4 bytes */
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dmap_save = DMAP;
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D10VTranslate (src, &dmap_src, &s);
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D10VTranslate (dst, &dmap_dst, &d);
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while (size > 0)
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{
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/* NB: Transfer 4 byte (long) quantites, problems occure
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when only two bytes are transfered */
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DMAP = dmap_src;
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tmp = *s;
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DMAP = dmap_dst;
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*d = tmp;
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d++;
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s++;
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size -= sizeof (tmp);
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src += sizeof (tmp);
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dst += sizeof (tmp);
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if ((src & 0x3fff) == 0)
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D10VTranslate (src, &dmap_src, &s);
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if ((dst & 0x3fff) == 0)
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D10VTranslate (dst, &dmap_dst, &d);
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}
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DMAP = dmap_save;
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#endif /* D10V */
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}
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