[Blackfin][PATCH] Add BF537 stamp board support
diff --git a/cpu/bf537/cache.S b/cpu/bf537/cache.S
new file mode 100644
index 0000000..5bda5bf
--- /dev/null
+++ b/cpu/bf537/cache.S
@@ -0,0 +1,128 @@
+#define ASSEMBLY
+#include <asm/linkage.h>
+#include <config.h>
+#include <asm/blackfin.h>
+
+.text
+.align 2
+ENTRY(_blackfin_icache_flush_range)
+ R2 = -32;
+ R2 = R0 & R2;
+ P0 = R2;
+ P1 = R1;
+ CSYNC;
+ 1:
+ IFLUSH[P0++];
+ CC = P0 < P1(iu);
+ IF CC JUMP 1b(bp);
+ IFLUSH[P0];
+ SSYNC;
+ RTS;
+
+ENTRY(_blackfin_dcache_flush_range)
+ R2 = -32;
+ R2 = R0 & R2;
+ P0 = R2;
+ P1 = R1;
+ CSYNC;
+1:
+ FLUSH[P0++];
+ CC = P0 < P1(iu);
+ IF CC JUMP 1b(bp);
+ FLUSH[P0];
+ SSYNC;
+ RTS;
+
+ENTRY(_icache_invalidate)
+ENTRY(_invalidate_entire_icache)
+ [--SP] = (R7:5);
+
+ P0.L = (IMEM_CONTROL & 0xFFFF);
+ P0.H = (IMEM_CONTROL >> 16);
+ R7 =[P0];
+
+ /*
+ * Clear the IMC bit , All valid bits in the instruction
+ * cache are set to the invalid state
+ */
+ BITCLR(R7, IMC_P);
+ CLI R6;
+ /* SSYNC required before invalidating cache. */
+ SSYNC;
+ .align 8;
+ [P0] = R7;
+ SSYNC;
+ STI R6;
+
+ /* Configures the instruction cache agian */
+ R6 = (IMC | ENICPLB);
+ R7 = R7 | R6;
+
+ CLI R6;
+ SSYNC;
+ .align 8;
+ [P0] = R7;
+ SSYNC;
+ STI R6;
+
+ (R7:5) =[SP++];
+ RTS;
+
+/*
+ * Invalidate the Entire Data cache by
+ * clearing DMC[1:0] bits
+ */
+ENTRY(_invalidate_entire_dcache)
+ENTRY(_dcache_invalidate)
+ [--SP] = (R7:6);
+
+ P0.L = (DMEM_CONTROL & 0xFFFF);
+ P0.H = (DMEM_CONTROL >> 16);
+ R7 =[P0];
+
+ /*
+ * Clear the DMC[1:0] bits, All valid bits in the data
+ * cache are set to the invalid state
+ */
+ BITCLR(R7, DMC0_P);
+ BITCLR(R7, DMC1_P);
+ CLI R6;
+ SSYNC;
+ .align 8;
+ [P0] = R7;
+ SSYNC;
+ STI R6;
+ /* Configures the data cache again */
+
+ R6 = (ACACHE_BCACHE | ENDCPLB | PORT_PREF0);
+ R7 = R7 | R6;
+
+ CLI R6;
+ SSYNC;
+ .align 8;
+ [P0] = R7;
+ SSYNC;
+ STI R6;
+
+ (R7:6) =[SP++];
+ RTS;
+
+ENTRY(_blackfin_dcache_invalidate_range)
+ R2 = -32;
+ R2 = R0 & R2;
+ P0 = R2;
+ P1 = R1;
+ CSYNC;
+1:
+ FLUSHINV[P0++];
+ CC = P0 < P1(iu);
+ IF CC JUMP 1b(bp);
+
+ /*
+ * If the data crosses a cache line, then we'll be pointing to
+ * the last cache line, but won't have flushed/invalidated it yet, so do
+ * one more.
+ */
+ FLUSHINV[P0];
+ SSYNC;
+ RTS;