Blackfin arch: When icache is off, make sure people know it
Robin Getz [Sat, 26 Jul 2008 11:39:19 +0000 (19:39 +0800)]
Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

arch/blackfin/kernel/setup.c

index 5a455b6..c2248fe 100644 (file)
@@ -948,7 +948,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
        uint32_t revid;
 
        u_long cclk = 0, sclk = 0;
-       u_int dcache_size = 0, dsup_banks = 0;
+       u_int icache_size = BFIN_ICACHESIZE / 1024, dcache_size = 0, dsup_banks = 0;
 
        cpu = CPU;
        mmu = "none";
@@ -1017,12 +1017,15 @@ static int show_cpuinfo(struct seq_file *m, void *v)
        }
 
        /* Is it turned on? */
-       if (!((bfin_read_DMEM_CONTROL()) & (ENDCPLB | DMC_ENABLE)))
+       if (bfin_read_DMEM_CONTROL() & (ENDCPLB | DMC_ENABLE) != (ENDCPLB | DMC_ENABLE))
                dcache_size = 0;
 
+       if (bfin_read_IMEM_CONTROL() & (IMC | ENICPLB) == (IMC | ENICPLB))
+               icache_size = 0;
+
        seq_printf(m, "cache size\t: %d KB(L1 icache) "
                "%d KB(L1 dcache-%s) %d KB(L2 cache)\n",
-               BFIN_ICACHESIZE / 1024, dcache_size,
+               icache_size, dcache_size,
 #if defined CONFIG_BFIN_WB
                "wb"
 #elif defined CONFIG_BFIN_WT
@@ -1032,8 +1035,12 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 
        seq_printf(m, "%s\n", cache);
 
-       seq_printf(m, "icache setup\t: %d Sub-banks/%d Ways, %d Lines/Way\n",
-                  BFIN_ISUBBANKS, BFIN_IWAYS, BFIN_ILINES);
+       if (icache_size)
+               seq_printf(m, "icache setup\t: %d Sub-banks/%d Ways, %d Lines/Way\n",
+                          BFIN_ISUBBANKS, BFIN_IWAYS, BFIN_ILINES);
+       else
+               seq_printf(m, "icache setup\t: off\n");
+
        seq_printf(m,
                   "dcache setup\t: %d Super-banks/%d Sub-banks/%d Ways, %d Lines/Way\n",
                   dsup_banks, BFIN_DSUBBANKS, BFIN_DWAYS,