Blackfin: drop unused cache flush code

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

2 files changed, 1 insertions, 231 deletions

diff --git a/cpu/blackfin/Makefile b/cpu/blackfin/Makefile
index f194a38..8fed4b4 100644
--- a/cpu/blackfin/Makefile
+++ b/cpu/blackfin/Makefile
@@ -16,7 +16,7 @@ LIB	= $(obj)lib$(CPU).a
 EXTRA    :=
 CEXTRA   := initcode.o
 SEXTRA   := start.o
-SOBJS    := interrupt.o cache.o flush.o
+SOBJS    := interrupt.o cache.o
 COBJS    := cpu.o traps.o interrupts.o reset.o serial.o i2c.o watchdog.o
 
 ifeq ($(CONFIG_BFIN_BOOT_MODE),BFIN_BOOT_BYPASS)
diff --git a/cpu/blackfin/flush.S b/cpu/blackfin/flush.S
deleted file mode 100644
index 417f798..0000000
--- a/cpu/blackfin/flush.S
+++ /dev/null
@@ -1,230 +0,0 @@
-/* flush.S - low level cache flushing routines
- * Copyright (C) 2003-2007 Analog Devices Inc.
- * Licensed under the GPL-2 or later.
- */
-
-#include <config.h>
-#include <asm/blackfin.h>
-#include <asm/cplb.h>
-#include <asm/mach-common/bits/mpu.h>
-
-.text
-
-/* This is an external function being called by the user
- * application through __flush_cache_all. Currently this function
- * serves the purpose of flushing all the pending writes in
- * in the data cache.
- */
-
-ENTRY(_flush_data_cache)
-	[--SP] = ( R7:6, P5:4 );
-	LINK 12;
-	SP += -12;
-	P5.H = HI(DCPLB_ADDR0);
-	P5.L = LO(DCPLB_ADDR0);
-	P4.H = HI(DCPLB_DATA0);
-	P4.L = LO(DCPLB_DATA0);
-	R7 = CPLB_VALID | CPLB_L1_CHBL | CPLB_DIRTY (Z);
-	R6 = 16;
-.Lnext:	R0 = [P5++];
-	R1 = [P4++];
-	CC = BITTST(R1, 14);	/* Is it write-through?*/
-	IF CC JUMP .Lskip;	/* If so, ignore it.*/
-	R2 = R1 & R7;		/* Is it a dirty, cached page?*/
-	CC = R2;
-	IF !CC JUMP .Lskip;	/* If not, ignore it.*/
-	[--SP] = RETS;
-	CALL _dcplb_flush;	/* R0 = page, R1 = data*/
-	RETS = [SP++];
-.Lskip:	R6 += -1;
-	CC = R6;
-	IF CC JUMP .Lnext;
-	SSYNC;
-	SP += 12;
-	UNLINK;
-	( R7:6, P5:4 ) = [SP++];
-	RTS;
-ENDPROC(_flush_data_cache)
-
-/* This is an internal function to flush all pending
- * writes in the cache associated with a particular DCPLB.
- *
- * R0 -  page's start address
- * R1 -  CPLB's data field.
- */
-
-.align 2
-ENTRY(_dcplb_flush)
-	[--SP] = ( R7:0, P5:0 );
-	[--SP] = LC0;
-	[--SP] = LT0;
-	[--SP] = LB0;
-	[--SP] = LC1;
-	[--SP] = LT1;
-	[--SP] = LB1;
-
-	/* If it's a 1K or 4K page, then it's quickest to
-	 * just systematically flush all the addresses in
-	 * the page, regardless of whether they're in the
-	 * cache, or dirty. If it's a 1M or 4M page, there
-	 * are too many addresses, and we have to search the
-	 * cache for lines corresponding to the page.
-	 */
-
-	CC = BITTST(R1, 17);	/* 1MB or 4MB */
-	IF !CC JUMP .Ldflush_whole_page;
-
-	/* We're only interested in the page's size, so extract
-	 * this from the CPLB (bits 17:16), and scale to give an
-	 * offset into the page_size and page_prefix tables.
-	 */
-
-	R1 <<= 14;
-	R1 >>= 30;
-	R1 <<= 2;
-
-	/* The page could be mapped into Bank A or Bank B, depending
-	 * on (a) whether both banks are configured as cache, and
-	 * (b) on whether address bit A[x] is set. x is determined
-	 * by DCBS in DMEM_CONTROL
-	 */
-
-	R2 = 0;			/* Default to Bank A (Bank B would be 1)*/
-
-	P0.L = LO(DMEM_CONTROL);
-	P0.H = HI(DMEM_CONTROL);
-
-	R3 = [P0];		/* If Bank B is not enabled as cache*/
-	CC = BITTST(R3, 2);	/* then Bank A is our only option.*/
-	IF CC JUMP .Lbank_chosen;
-
-	R4 = 1<<14;		/* If DCBS==0, use A[14].*/
-	R5 = R4 << 7;		/* If DCBS==1, use A[23];*/
-	CC = BITTST(R3, 4);
-	IF CC R4 = R5;		/* R4 now has either bit 14 or bit 23 set.*/
-	R5 = R0 & R4;		/* Use it to test the Page address*/
-	CC = R5;		/* and if that bit is set, we use Bank B,*/
-	R2 = CC;		/* else we use Bank A.*/
-	R2 <<= 23;		/* The Bank selection's at posn 23.*/
-
-.Lbank_chosen:
-
-	/* We can also determine the sub-bank used, because this is
-	 * taken from bits 13:12 of the address.
-	 */
-
-	R3 = ((12<<8)|2);		/* Extraction pattern */
-	nop;				/*Anamoly 05000209*/
-	R4 = EXTRACT(R0, R3.L) (Z);	/* Extract bits*/
-	/* Save in extraction pattern for later deposit.*/
-	R3.H = R4.L << 0;
-
-	/* So:
-	 * R0 = Page start
-	 * R1 = Page length (actually, offset into size/prefix tables)
-	 * R2 = Bank select mask
-	 * R3 = sub-bank deposit values
-	 *
-	 * The cache has 2 Ways, and 64 sets, so we iterate through
-	 * the sets, accessing the tag for each Way, for our Bank and
-	 * sub-bank, looking for dirty, valid tags that match our
-	 * address prefix.
-	 */
-
-	P5.L = LO(DTEST_COMMAND);
-	P5.H = HI(DTEST_COMMAND);
-	P4.L = LO(DTEST_DATA0);
-	P4.H = HI(DTEST_DATA0);
-
-	P0.L = page_prefix_table;
-	P0.H = page_prefix_table;
-	P1 = R1;
-	R5 = 0;			/* Set counter*/
-	P0 = P1 + P0;
-	R4 = [P0];		/* This is the address prefix*/
-
-
-	/* We're reading (bit 1==0) the tag (bit 2==0), and we
-	 * don't care about which double-word, since we're only
-	 * fetching tags, so we only have to set Set, Bank,
-	 * Sub-bank and Way.
-	 */
-
-	P2 = 2;
-	LSETUP (.Lfs1, .Lfe1) LC1 = P2;
-.Lfs1:	P0 = 64;		/* iterate over all sets*/
-	LSETUP (.Lfs0, .Lfe0) LC0 = P0;
-.Lfs0:	R6 = R5 << 5;		/* Combine set*/
-	R6.H = R3.H << 0 ;	/* and sub-bank*/
-	R6 = R6 | R2;		/* and Bank. Leave Way==0 at first.*/
-	BITSET(R6,14);
-	[P5] = R6;		/* Issue Command*/
-	SSYNC;
-	R7 = [P4];		/* and read Tag.*/
-	CC = BITTST(R7, 0);	/* Check if valid*/
-	IF !CC JUMP .Lfskip;	/* and skip if not.*/
-	CC = BITTST(R7, 1);	/* Check if dirty*/
-	IF !CC JUMP .Lfskip;	/* and skip if not.*/
-
-	/* Compare against the page address. First, plant bits 13:12
-	 * into the tag, since those aren't part of the returned data.
-	 */
-
-	R7 = DEPOSIT(R7, R3);	/* set 13:12*/
-	R1 = R7 & R4;		/* Mask off lower bits*/
-	CC = R1 == R0;		/* Compare against page start.*/
-	IF !CC JUMP .Lfskip;	/* Skip it if it doesn't match.*/
-
-	/* Tag address matches against page, so this is an entry
-	 * we must flush.
-	 */
-
-	R7 >>= 10;		/* Mask off the non-address bits*/
-	R7 <<= 10;
-	P3 = R7;
-	SSYNC;
-	FLUSHINV [P3];		/* And flush the entry*/
-.Lfskip:
-.Lfe0:	R5 += 1;		/* Advance to next Set*/
-.Lfe1:	BITSET(R2, 26);		/* Go to next Way.*/
-
-.Ldfinished:
-	SSYNC;			/* Ensure the data gets out to mem.*/
-
-	/*Finished. Restore context.*/
-	LB1 = [SP++];
-	LT1 = [SP++];
-	LC1 = [SP++];
-	LB0 = [SP++];
-	LT0 = [SP++];
-	LC0 = [SP++];
-	( R7:0, P5:0 ) = [SP++];
-	RTS;
-
-.Ldflush_whole_page:
-
-	/* It's a 1K or 4K page, so quicker to just flush the
-	 * entire page.
-	 */
-
-	P1 = 32;		/* For 1K pages*/
-	P2 = P1 << 2;		/* For 4K pages*/
-	P0 = R0;		/* Start of page*/
-	CC = BITTST(R1, 16);	/* Whether 1K or 4K*/
-	IF CC P1 = P2;
-	P1 += -1;		/* Unroll one iteration*/
-	SSYNC;
-	FLUSHINV [P0++];	/* because CSYNC can't end loops.*/
-	LSETUP (.Leall, .Leall) LC0 = P1;
-.Leall:	FLUSHINV [P0++];
-	SSYNC;
-	JUMP .Ldfinished;
-ENDPROC(_dcplb_flush)
-
-.align 4;
-page_prefix_table:
-.byte4	0xFFFFFC00;	/* 1K */
-.byte4	0xFFFFF000;	/* 4K */
-.byte4	0xFFF00000;	/* 1M */
-.byte4	0xFFC00000;	/* 4M */
-.page_prefix_table.end: