s5pc1xx: update the README file

[karo-tx-uboot.git] / lib_blackfin / cache.c

diff --git a/lib_blackfin/cache.c b/lib_blackfin/cache.c
index 870c5bfbac748aef7d104526d9db75fd2b0a28b1..0a321a448f4abda2faf9c727db50dec607fbb682 100644 (file)
--- a/lib_blackfin/cache.c
+++ b/lib_blackfin/cache.c
@@ -15,16 +15,64 @@
 
 void flush_cache(unsigned long addr, unsigned long size)
 {
+       void *start_addr, *end_addr;
+       int istatus, dstatus;
+
        /* no need to flush stuff in on chip memory (L1/L2/etc...) */
        if (addr >= 0xE0000000)
                return;
 
-       if (icache_status())
-               blackfin_icache_flush_range((void *)addr, (void *)(addr + size));
+       start_addr = (void *)addr;
+       end_addr = (void *)(addr + size);
+       istatus = icache_status();
+       dstatus = dcache_status();
+
+       if (istatus) {
+               if (dstatus)
+                       blackfin_icache_dcache_flush_range(start_addr, end_addr);
+               else
+                       blackfin_icache_flush_range(start_addr, end_addr);
+       } else if (dstatus)
+               blackfin_dcache_flush_range(start_addr, end_addr);
+}
+
+#ifdef CONFIG_DCACHE_WB
+static void flushinv_all_dcache(void)
+{
+       u32 way, bank, subbank, set;
+       u32 status, addr;
+       u32 dmem_ctl = bfin_read_DMEM_CONTROL();
+
+       for (bank = 0; bank < 2; ++bank) {
+               if (!(dmem_ctl & (1 << (DMC1_P - bank))))
+                       continue;
+
+               for (way = 0; way < 2; ++way)
+                       for (subbank = 0; subbank < 4; ++subbank)
+                               for (set = 0; set < 64; ++set) {
+
+                                       bfin_write_DTEST_COMMAND(
+                                               way << 26 |
+                                               bank << 23 |
+                                               subbank << 16 |
+                                               set << 5
+                                       );
+                                       CSYNC();
+                                       status = bfin_read_DTEST_DATA0();
+
+                                       /* only worry about valid/dirty entries */
+                                       if ((status & 0x3) != 0x3)
+                                               continue;
+
+                                       /* construct the address using the tag */
+                                       addr = (status & 0xFFFFC800) | (subbank << 12) | (set << 5);
 
-       if (dcache_status())
-               blackfin_dcache_flush_range((void *)addr, (void *)(addr + size));
+                                       /* flush it */
+                                       __asm__ __volatile__("FLUSHINV[%0];" : : "a"(addr));
+                               }
+       }
 }
+#endif
 
 void icache_enable(void)
 {
@@ -51,6 +99,10 @@ void dcache_enable(void)
 
 void dcache_disable(void)
 {
+#ifdef CONFIG_DCACHE_WB
+       bfin_write_DMEM_CONTROL(bfin_read_DMEM_CONTROL() & ~(ENDCPLB));
+       flushinv_all_dcache();
+#endif
        bfin_write_DMEM_CONTROL(0);
        SSYNC();
 }