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Commit c250bfb9 authored by Mike Frysinger's avatar Mike Frysinger Committed by Bryan Wu
Browse files

Blackfin arch: cleanup and unify the ins functions 



this also fixes some errors in the ipipe merge

Signed-off-by: default avatarMike Frysinger <vapier.adi@gmail.com>
Signed-off-by: default avatarBryan Wu <cooloney@kernel.org>
parent 39ca4453

arch/blackfin/lib/ins.S

+84 −345
Original line number Diff line number Diff line 
/*

 * File:         arch/blackfin/lib/ins.S

 * Based on:

 * Author:       Bas Vermeulen <bas@buyways.nl>

 * arch/blackfin/lib/ins.S - ins{bwl} using hardware loops

 *

 * Created:      Tue Mar 22 15:27:24 CEST 2005

 * Description:  Implementation of ins{bwl} for BlackFin processors using zero overhead loops.

 *

 * Modified:

 * Copyright 2004-2008 Analog Devices Inc.

 * Copyright (C) 2005 Bas Vermeulen, BuyWays BV <bas@buyways.nl>

 *

 * Bugs:         Enter bugs at http://blackfin.uclinux.org/

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, see the file COPYING, or write

 * to the Free Software Foundation, Inc.,

 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 * Licensed under the GPL-2 or later.

 */



#include <linux/linkage.h>
@@ -33,6 +11,46 @@ 


.align 2



#ifdef CONFIG_IPIPE

# define DO_CLI \

	[--sp] = rets; \

	[--sp] = (P5:0); \

	sp += -12; \

	call ___ipipe_stall_root_raw; \

	sp += 12; \

	(P5:0) = [sp++];

# define CLI_INNER_NOP

#else

# define DO_CLI cli R3;

# define CLI_INNER_NOP nop; nop; nop;

#endif



#ifdef CONFIG_IPIPE

# define DO_STI \

	sp += -12; \

	call ___ipipe_unstall_root_raw; \

	sp += 12; \

2:	rets = [sp++];

#else

# define DO_STI 2: sti R3;

#endif



#ifdef CONFIG_BFIN_INS_LOWOVERHEAD

# define CLI_OUTER DO_CLI;

# define STI_OUTER DO_STI;

# define CLI_INNER 1:

# if ANOMALY_05000416

#  define STI_INNER nop; 2: nop;

# else

#  define STI_INNER 2:

# endif

#else

# define CLI_OUTER

# define STI_OUTER

# define CLI_INNER 1: DO_CLI; CLI_INNER_NOP;

# define STI_INNER DO_STI;

#endif



/*

 * Reads on the Blackfin are speculative. In Blackfin terms, this means they

 * can be interrupted at any time (even after they have been issued on to the
@@ -53,327 +71,48 @@ 
 * buffers in/out of FIFOs.

 */



ENTRY(_insl)

#ifdef CONFIG_BFIN_INS_LOWOVERHEAD

	P0 = R0;	/* P0 = port */

#ifdef CONFIG_IPIPE

	[--sp] = rets

	[--sp] = (P5:0);

	sp += -12

	call ___ipipe_stall_root_raw

	sp += 12

	(P5:0) = [sp++];

#else

	cli R3;

#endif

	P1 = R1;	/* P1 = address */

	P2 = R2;	/* P2 = count */

	SSYNC;

	LSETUP( .Llong_loop_s, .Llong_loop_e) LC0 = P2;

.Llong_loop_s:  R0 = [P0];

		[P1++] = R0;

		NOP;

.Llong_loop_e: 	NOP;

#ifdef CONFIG_IPIPE

	sp += -12

	call ___ipipe_unstall_root_raw

	sp += 12

	rets = [sp++]

#else

	sti R3;

#endif

	RTS;

#else

	P0 = R0;	/* P0 = port */

	P1 = R1;	/* P1 = address */

	P2 = R2;	/* P2 = count */

	SSYNC;

	LSETUP( .Llong_loop_s, .Llong_loop_e) LC0 = P2;

.Llong_loop_s:

#ifdef CONFIG_IPIPE

	[--sp] = rets

	[--sp] = (P5:0);

	sp += -12

	call ___ipipe_stall_root_raw

	sp += 12

	(P5:0) = [sp++];

#else

	CLI R3;

#endif

	NOP; NOP; NOP;

	R0 = [P0];

	[P1++] = R0;

.Llong_loop_e:

#ifdef CONFIG_IPIPE

	sp += -12

	call ___ipipe_unstall_root_raw

	sp += 12

	rets = [sp++]

#else

	STI R3;

#endif

	RTS;

#endif

ENDPROC(_insl)

#define COMMON_INS(func, ops) \

ENTRY(_ins##func) \

	P0 = R0;	/* P0 = port */ \

	CLI_OUTER;	/* 3 instructions before first read access */ \

	P1 = R1;	/* P1 = address */ \

	P2 = R2;	/* P2 = count */ \

	SSYNC; \

 \

	LSETUP(1f, 2f) LC0 = P2; \

	CLI_INNER; \

	ops; \

	STI_INNER; \

 \

	STI_OUTER; \

	RTS; \

ENDPROC(_ins##func)



ENTRY(_insw)

#ifdef CONFIG_BFIN_INS_LOWOVERHEAD

	P0 = R0;	/* P0 = port */

#ifdef CONFIG_IPIPE

	[--sp] = rets

	[--sp] = (P5:0);

	sp += -12

	call ___ipipe_stall_root_raw

	sp += 12

	(P5:0) = [sp++];

#else

	cli R3;

#endif

	P1 = R1;	/* P1 = address */

	P2 = R2;	/* P2 = count */

	SSYNC;

	LSETUP( .Lword_loop_s, .Lword_loop_e) LC0 = P2;

.Lword_loop_s:  R0 = W[P0];

		W[P1++] = R0;

		NOP;

.Lword_loop_e: 	NOP;

#ifdef CONFIG_IPIPE

	sp += -12

	call ___ipipe_unstall_root_raw

	sp += 12

	rets = [sp++]

#else

	sti R3;

#endif

	RTS;

#else

	P0 = R0;	/* P0 = port */

	P1 = R1;	/* P1 = address */

	P2 = R2;	/* P2 = count */

	SSYNC;

	LSETUP( .Lword_loop_s, .Lword_loop_e) LC0 = P2;

.Lword_loop_s:

#ifdef CONFIG_IPIPE

	[--sp] = rets

	[--sp] = (P5:0);

	sp += -12

	call ___ipipe_stall_root_raw

	sp += 12

	(P5:0) = [sp++];

#else

	CLI R3;

#endif

	NOP; NOP; NOP;

	R0 = W[P0];

	W[P1++] = R0;

.Lword_loop_e:

#ifdef CONFIG_IPIPE

	sp += -12

	call ___ipipe_unstall_root_raw

	sp += 12

	rets = [sp++]

#else

	STI R3;

#endif

	RTS;

COMMON_INS(l, \

	R0 = [P0]; \

	[P1++] = R0; \

)



#endif

ENDPROC(_insw)

COMMON_INS(w, \

	R0 = W[P0]; \

	W[P1++] = R0; \

)



ENTRY(_insw_8)

#ifdef CONFIG_BFIN_INS_LOWOVERHEAD

	P0 = R0;	/* P0 = port */

#ifdef CONFIG_IPIPE

	[--sp] = rets

	[--sp] = (P5:0);

	sp += -12

	call ___ipipe_stall_root_raw

	sp += 12

	(P5:0) = [sp++];

#else

	cli R3;

#endif

	P1 = R1;	/* P1 = address */

	P2 = R2;	/* P2 = count */

	SSYNC;

	LSETUP( .Lword8_loop_s, .Lword8_loop_e) LC0 = P2;

.Lword8_loop_s:  R0 = W[P0];

		B[P1++] = R0;

		R0 = R0 >> 8;

		B[P1++] = R0;

		NOP;

.Lword8_loop_e: NOP;

#ifdef CONFIG_IPIPE

	sp += -12

	call ___ipipe_unstall_root_raw

	sp += 12

	rets = [sp++]

#else

	sti R3;

#endif

	RTS;

#else

	P0 = R0;	/* P0 = port */

	P1 = R1;	/* P1 = address */

	P2 = R2;	/* P2 = count */

	SSYNC;

	LSETUP( .Lword8_loop_s, .Lword8_loop_e) LC0 = P2;

.Lword8_loop_s:

#ifdef CONFIG_IPIPE

	[--sp] = rets

	[--sp] = (P5:0);

	sp += -12

	call ___ipipe_stall_root_raw

	sp += 12

	(P5:0) = [sp++];

#else

	CLI R3;

#endif

	NOP; NOP; NOP;

	R0 = W[P0];

	B[P1++] = R0;

	R0 = R0 >> 8;

	B[P1++] = R0;

	NOP;

.Lword8_loop_e:

#ifdef CONFIG_IPIPE

	sp += -12

	call ___ipipe_unstall_root_raw

	sp += 12

	rets = [sp++]

#else

	STI R3;

#endif

	RTS;

#endif

ENDPROC(_insw_8)

COMMON_INS(w_8, \

	R0 = W[P0]; \

	B[P1++] = R0; \

	R0 = R0 >> 8; \

	B[P1++] = R0; \

)



ENTRY(_insb)

#ifdef CONFIG_BFIN_INS_LOWOVERHEAD

	P0 = R0;	/* P0 = port */

#ifdef CONFIG_IPIPE

	[--sp] = rets

	[--sp] = (P5:0);

	sp += -12

	call ___ipipe_stall_root_raw

	sp += 12

	(P5:0) = [sp++];

#else

	cli R3;

#endif

	P1 = R1;	/* P1 = address */

	P2 = R2;	/* P2 = count */

	SSYNC;

	LSETUP( .Lbyte_loop_s, .Lbyte_loop_e) LC0 = P2;

.Lbyte_loop_s:  R0 = B[P0];

		B[P1++] = R0;

		NOP;

.Lbyte_loop_e:  NOP;

#ifdef CONFIG_IPIPE

	sp += -12

	call ___ipipe_unstall_root_raw

	sp += 12

	rets = [sp++]

#else

	sti R3;

#endif

	RTS;

#else

	P0 = R0;        /* P0 = port */

	P1 = R1;        /* P1 = address */

	P2 = R2;        /* P2 = count */

	SSYNC;

	LSETUP( .Lbyte_loop_s, .Lbyte_loop_e) LC0 = P2;

.Lbyte_loop_s:

#ifdef CONFIG_IPIPE

	[--sp] = rets

	[--sp] = (P5:0);

	sp += -12

	call ___ipipe_stall_root_raw

	sp += 12

	(P5:0) = [sp++];

#else

	CLI R3;

#endif

	NOP; NOP; NOP;

	R0 = B[P0];

	B[P1++] = R0;

.Lbyte_loop_e:

#ifdef CONFIG_IPIPE

	sp += -12

	call ___ipipe_unstall_root_raw

	sp += 12

	rets = [sp++]

#else

	STI R3;

#endif

	RTS;

#endif

ENDPROC(_insb)

COMMON_INS(b, \

	R0 = B[P0]; \

	B[P1++] = R0; \

)



ENTRY(_insl_16)

#ifdef CONFIG_BFIN_INS_LOWOVERHEAD

	P0 = R0;	/* P0 = port */

#ifdef CONFIG_IPIPE

	[--sp] = rets

	[--sp] = (P5:0);

	sp += -12

	call ___ipipe_stall_root_raw

	sp += 12

	(P5:0) = [sp++];

#else

	cli R3;

#endif

	P1 = R1;	/* P1 = address */

	P2 = R2;	/* P2 = count */

	SSYNC;

	LSETUP( .Llong16_loop_s, .Llong16_loop_e) LC0 = P2;

.Llong16_loop_s:  R0 = [P0];

		  W[P1++] = R0;

		  R0 = R0 >> 16;

		  W[P1++] = R0;

		  NOP;

.Llong16_loop_e:  NOP;

#ifdef CONFIG_IPIPE

	sp += -12

	call ___ipipe_unstall_root_raw

	sp += 12

	rets = [sp++]

#else

	sti R3;

#endif

	RTS;

#else

	P0 = R0;	/* P0 = port */

	P1 = R1;	/* P1 = address */

	P2 = R2;	/* P2 = count */

	SSYNC;

	LSETUP( .Llong16_loop_s, .Llong16_loop_e) LC0 = P2;

.Llong16_loop_s:

#ifdef CONFIG_IPIPE

	[--sp] = rets

	[--sp] = (P5:0);

	sp += -12

	call ___ipipe_stall_root_raw

	sp += 12

	(P5:0) = [sp++];

#else

	CLI R3;

#endif

	NOP; NOP; NOP;

	R0 = [P0];

	W[P1++] = R0;

	R0 = R0 >> 16;

	W[P1++] = R0;

.Llong16_loop_e:

#ifdef CONFIG_IPIPE

	sp += -12

	call ___ipipe_unstall_root_raw

	sp += 12

	rets = [sp++]

#else

	STI R3;

#endif

	RTS;

#endif

ENDPROC(_insl_16)
 
COMMON_INS(l_16, \

	R0 = [P0]; \

	W[P1++] = R0; \

	R0 = R0 >> 16; \

	W[P1++] = R0; \

)