break dcache out of remote-nindy.c
This commit is contained in:
K. Richard Pixley
parent
e7e02420a7
commit
5a0a463feb
3 changed files with 15 additions and 175 deletions
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@ -31,6 +31,12 @@ Tue Aug 31 15:01:27 1993 K. Richard Pixley (rich@sendai.cygnus.com)
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* Makefile.in (REMOTE_O): add dcache.o.
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* config/m88k/m88k.mt (TDEPFILES): removed dcache.o.
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Break dcache code out of remote-nindy.c.
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* remote-nindy.c: removed dcache code. Changed callers to use new
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conventions. include dcache.h.
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(nindy_dcache): new static variable.
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* config/i960/nindy960.mt (TDEPFILES): added dcache.o.
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Break dcache code out of remote-bug.c into dcache.[hc].
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* Makefile.in (dcache_h): new macro.
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(HFILES): added $(dcache_h).
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@ -1,5 +1,5 @@
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# Target: Intel 80960, in an embedded system under the NINDY monitor
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TDEPFILES= exec.o i960-pinsn.o i960-tdep.o nindy-tdep.o remote-nindy.o nindy.o Onindy.o ttyflush.o
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TDEPFILES= exec.o i960-pinsn.o i960-tdep.o nindy-tdep.o remote-nindy.o dcache.o nindy.o Onindy.o ttyflush.o
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TM_FILE= tm-nindy960.h
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# Don't use remote.o; it doesn't compile (and won't work) due to lack of
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# BREAKPOINT.
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@ -116,6 +116,10 @@ NINDY ROM monitor at the other end of the line.
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#include "nindy-share/env.h"
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#include "nindy-share/stop.h"
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#include "dcache.h"
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static DCACHE *nindy_dcache;
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extern int unlink();
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extern char *getenv();
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extern char *mktemp();
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@ -145,12 +149,6 @@ static int regs_changed = 0; /* 1 iff regs were modified since last read */
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extern char *exists();
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static void
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dcache_flush (), dcache_poke (), dcache_init();
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static int
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dcache_fetch ();
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static void
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nindy_fetch_registers PARAMS ((int));
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@ -190,7 +188,7 @@ nindy_open (name, from_tty)
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nindy_close (0);
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have_regs = regs_changed = 0;
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dcache_init();
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nindy_dcache = dcache_init(ninMemGet, ninMemPut);
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/* Allow user to interrupt the following -- we could hang if there's
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no NINDY at the other end of the remote tty. */
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@ -258,7 +256,7 @@ nindy_resume (pid, step, siggnal)
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if (siggnal != 0 && siggnal != stop_signal)
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error ("Can't send signals to remote NINDY targets.");
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dcache_flush();
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dcache_flush(nindy_dcache);
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if ( regs_changed ){
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nindy_store_registers (-1);
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regs_changed = 0;
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@ -501,7 +499,7 @@ int
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nindy_fetch_word (addr)
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CORE_ADDR addr;
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{
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return dcache_fetch (addr);
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return dcache_fetch (nindy_dcache, addr);
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}
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/* Write a word WORD into remote address ADDR.
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@ -512,7 +510,7 @@ nindy_store_word (addr, word)
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CORE_ADDR addr;
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int word;
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{
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dcache_poke (addr, word);
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dcache_poke (nindy_dcache, addr, word);
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}
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/* Copy LEN bytes to or from inferior's memory starting at MEMADDR
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@ -587,170 +585,6 @@ nindy_xfer_inferior_memory(memaddr, myaddr, len, write, target)
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return len;
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}
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/* The data cache records all the data read from the remote machine
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since the last time it stopped.
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Each cache block holds 16 bytes of data
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starting at a multiple-of-16 address. */
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#define DCACHE_SIZE 64 /* Number of cache blocks */
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struct dcache_block {
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struct dcache_block *next, *last;
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unsigned int addr; /* Address for which data is recorded. */
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int data[4];
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};
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struct dcache_block dcache_free, dcache_valid;
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/* Free all the data cache blocks, thus discarding all cached data. */
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static
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void
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dcache_flush ()
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{
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register struct dcache_block *db;
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while ((db = dcache_valid.next) != &dcache_valid)
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{
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remque (db);
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insque (db, &dcache_free);
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}
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}
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/*
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* If addr is present in the dcache, return the address of the block
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* containing it.
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*/
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static
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struct dcache_block *
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dcache_hit (addr)
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unsigned int addr;
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{
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register struct dcache_block *db;
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if (addr & 3)
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abort ();
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/* Search all cache blocks for one that is at this address. */
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db = dcache_valid.next;
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while (db != &dcache_valid)
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{
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if ((addr & 0xfffffff0) == db->addr)
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return db;
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db = db->next;
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}
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return NULL;
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}
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/* Return the int data at address ADDR in dcache block DC. */
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static
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int
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dcache_value (db, addr)
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struct dcache_block *db;
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unsigned int addr;
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{
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if (addr & 3)
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abort ();
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return (db->data[(addr>>2)&3]);
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}
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/* Get a free cache block, put or keep it on the valid list,
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and return its address. The caller should store into the block
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the address and data that it describes, then remque it from the
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free list and insert it into the valid list. This procedure
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prevents errors from creeping in if a ninMemGet is interrupted
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(which used to put garbage blocks in the valid list...). */
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static
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struct dcache_block *
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dcache_alloc ()
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{
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register struct dcache_block *db;
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if ((db = dcache_free.next) == &dcache_free)
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{
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/* If we can't get one from the free list, take last valid and put
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it on the free list. */
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db = dcache_valid.last;
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remque (db);
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insque (db, &dcache_free);
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}
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remque (db);
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insque (db, &dcache_valid);
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return (db);
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}
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/* Return the contents of the word at address ADDR in the remote machine,
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using the data cache. */
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static
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int
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dcache_fetch (addr)
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CORE_ADDR addr;
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{
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register struct dcache_block *db;
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db = dcache_hit (addr);
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if (db == 0)
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{
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db = dcache_alloc ();
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immediate_quit++;
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ninMemGet(addr & ~0xf, (unsigned char *)db->data, 16);
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immediate_quit--;
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db->addr = addr & ~0xf;
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remque (db); /* Off the free list */
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insque (db, &dcache_valid); /* On the valid list */
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}
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return (dcache_value (db, addr));
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}
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/* Write the word at ADDR both in the data cache and in the remote machine. */
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static void
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dcache_poke (addr, data)
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CORE_ADDR addr;
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int data;
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{
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register struct dcache_block *db;
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/* First make sure the word is IN the cache. DB is its cache block. */
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db = dcache_hit (addr);
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if (db == 0)
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{
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db = dcache_alloc ();
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immediate_quit++;
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ninMemGet(addr & ~0xf, (unsigned char *)db->data, 16);
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immediate_quit--;
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db->addr = addr & ~0xf;
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remque (db); /* Off the free list */
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insque (db, &dcache_valid); /* On the valid list */
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}
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/* Modify the word in the cache. */
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db->data[(addr>>2)&3] = data;
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/* Send the changed word. */
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immediate_quit++;
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ninMemPut(addr, (unsigned char *)&data, 4);
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immediate_quit--;
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}
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/* The cache itself. */
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struct dcache_block the_cache[DCACHE_SIZE];
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/* Initialize the data cache. */
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static void
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dcache_init ()
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{
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register i;
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register struct dcache_block *db;
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db = the_cache;
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dcache_free.next = dcache_free.last = &dcache_free;
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dcache_valid.next = dcache_valid.last = &dcache_valid;
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for (i=0;i<DCACHE_SIZE;i++,db++)
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insque (db, &dcache_free);
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}
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static void
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nindy_create_inferior (execfile, args, env)
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char *execfile;
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