ref: 556618eb07d1ac6e2c629a60acd53c45d53261be
dir: /sys/src/9/teg2/caches-v7.c/
/* * caches defined by arm v7 architecture */ #include "u.h" #include "../port/lib.h" #include "mem.h" #include "dat.h" #include "fns.h" #include "../port/error.h" #include "io.h" #include "arm.h" static char * l1iptype(uint type) { static char *types[] = { "reserved", "asid-tagged VIVT", "VIPT", "PIPT", }; if (type >= nelem(types) || types[type] == nil) return "GOK"; return types[type]; } static char *catype[] = { "none,", "i,", "d,", "split i&d,", "unified,", "gok,", "gok,", "gok,", }; void cacheinfo(int level, Memcache *cp, int ext, int type) { ulong setsways; memset(cp, 0, sizeof *cp); if (type == Nocache) return; cp->level = level; cp->type = type; cp->external = ext; if (level == 2) { /* external PL310 */ allcache->info(cp); setsways = cp->setsways; } else { /* select internal cache level */ cpwrsc(CpIDcssel, CpID, CpIDid, 0, (level - 1) << 1); setsways = cprdsc(CpIDcsize, CpID, CpIDid, 0); cp->l1ip = cpctget(); cp->nways = ((setsways >> 3) & MASK(10)) + 1; cp->nsets = ((setsways >> 13) & MASK(15)) + 1; cp->log2linelen = (setsways & MASK(2)) + 2 + 2; } cp->linelen = 1 << cp->log2linelen; cp->setsways = setsways; cp->setsh = cp->log2linelen; cp->waysh = 32 - log2(cp->nways); } void allcacheinfo(Memcache *mc) { int n; ulong lvl; lvl = cprdsc(CpIDcsize, CpID, CpIDidct, CpIDclvlid); n = 1; for (lvl &= MASK(21); lvl; lvl >>= 3) cacheinfo(n, &mc[n], Intcache, lvl & MASK(3)); // cacheinfo(2, &mc[2], Extcache, Unified); /* PL310 */ } void prcachecfg(void) { int cache; Memcache *mc; for (cache = 1; cache < 8 && cachel[cache].type; cache++) { mc = &cachel[cache]; iprint("l%d: %s %-10s %2d ways %4d sets %d bytes/line; can W[", mc->level, mc->external? "ext": "int", catype[mc->type], mc->nways, mc->nsets, mc->linelen); if (mc->linelen != CACHELINESZ) iprint(" *should* be %d", CACHELINESZ); if (mc->setsways & Cawt) iprint("T"); if (mc->setsways & Cawb) iprint("B"); if (mc->setsways & Cawa) iprint("A"); iprint("]"); if (cache == 1) iprint("; l1-i %s", l1iptype((mc->l1ip >> 14) & MASK(2))); iprint("\n"); } }