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+/*
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+** linux/atarihw.h -- This header defines some macros and pointers for
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+** the various Atari custom hardware registers.
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+**
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+** Copyright 1994 by Björn Brauel
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+**
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+** 5/1/94 Roman Hodek:
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+** Added definitions for TT specific chips.
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+**
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+** 1996-09-13 lars brinkhoff <f93labr@dd.chalmers.se>:
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+** Finally added definitions for the matrix/codec and the DSP56001 host
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+** interface.
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+**
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+** This file is subject to the terms and conditions of the GNU General Public
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+** License. See the file COPYING in the main directory of this archive
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+** for more details.
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+**
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+*/
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+
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+#ifndef _LINUX_ATARIHW_H_
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+#define _LINUX_ATARIHW_H_
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+
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+#include <linux/types.h>
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+#include <asm/bootinfo.h>
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+#include <asm/raw_io.h>
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+
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+extern u_long atari_mch_cookie;
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+extern u_long atari_mch_type;
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+extern u_long atari_switches;
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+extern int atari_rtc_year_offset;
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+extern int atari_dont_touch_floppy_select;
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+
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+extern int atari_SCC_reset_done;
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+
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+/* convenience macros for testing machine type */
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+#define MACH_IS_ST ((atari_mch_cookie >> 16) == ATARI_MCH_ST)
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+#define MACH_IS_STE ((atari_mch_cookie >> 16) == ATARI_MCH_STE && \
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+ (atari_mch_cookie & 0xffff) == 0)
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+#define MACH_IS_MSTE ((atari_mch_cookie >> 16) == ATARI_MCH_STE && \
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+ (atari_mch_cookie & 0xffff) == 0x10)
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+#define MACH_IS_TT ((atari_mch_cookie >> 16) == ATARI_MCH_TT)
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+#define MACH_IS_FALCON ((atari_mch_cookie >> 16) == ATARI_MCH_FALCON)
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+#define MACH_IS_MEDUSA (atari_mch_type == ATARI_MACH_MEDUSA)
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+#define MACH_IS_AB40 (atari_mch_type == ATARI_MACH_AB40)
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+
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+/* values for atari_switches */
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+#define ATARI_SWITCH_IKBD 0x01
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+#define ATARI_SWITCH_MIDI 0x02
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+#define ATARI_SWITCH_SND6 0x04
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+#define ATARI_SWITCH_SND7 0x08
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+#define ATARI_SWITCH_OVSC_SHIFT 16
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+#define ATARI_SWITCH_OVSC_IKBD (ATARI_SWITCH_IKBD << ATARI_SWITCH_OVSC_SHIFT)
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+#define ATARI_SWITCH_OVSC_MIDI (ATARI_SWITCH_MIDI << ATARI_SWITCH_OVSC_SHIFT)
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+#define ATARI_SWITCH_OVSC_SND6 (ATARI_SWITCH_SND6 << ATARI_SWITCH_OVSC_SHIFT)
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+#define ATARI_SWITCH_OVSC_SND7 (ATARI_SWITCH_SND7 << ATARI_SWITCH_OVSC_SHIFT)
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+#define ATARI_SWITCH_OVSC_MASK 0xffff0000
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+
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+/*
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+ * Define several Hardware-Chips for indication so that for the ATARI we do
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+ * no longer decide whether it is a Falcon or other machine . It's just
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+ * important what hardware the machine uses
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+ */
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+
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+/* ++roman 08/08/95: rewritten from ORing constants to a C bitfield */
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+
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+#define ATARIHW_DECLARE(name) unsigned name : 1
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+#define ATARIHW_SET(name) (atari_hw_present.name = 1)
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+#define ATARIHW_PRESENT(name) (atari_hw_present.name)
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+
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+struct atari_hw_present {
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+ /* video hardware */
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+ ATARIHW_DECLARE(STND_SHIFTER); /* ST-Shifter - no base low ! */
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+ ATARIHW_DECLARE(EXTD_SHIFTER); /* STe-Shifter - 24 bit address */
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+ ATARIHW_DECLARE(TT_SHIFTER); /* TT-Shifter */
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+ ATARIHW_DECLARE(VIDEL_SHIFTER); /* Falcon-Shifter */
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+ /* sound hardware */
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+ ATARIHW_DECLARE(YM_2149); /* Yamaha YM 2149 */
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+ ATARIHW_DECLARE(PCM_8BIT); /* PCM-Sound in STe-ATARI */
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+ ATARIHW_DECLARE(CODEC); /* CODEC Sound (Falcon) */
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+ /* disk storage interfaces */
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+ ATARIHW_DECLARE(TT_SCSI); /* Directly mapped NCR5380 */
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+ ATARIHW_DECLARE(ST_SCSI); /* NCR5380 via ST-DMA (Falcon) */
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+ ATARIHW_DECLARE(ACSI); /* Standard ACSI like in STs */
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+ ATARIHW_DECLARE(IDE); /* IDE Interface */
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+ ATARIHW_DECLARE(FDCSPEED); /* 8/16 MHz switch for FDC */
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+ /* other I/O hardware */
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+ ATARIHW_DECLARE(ST_MFP); /* The ST-MFP (there should be no Atari
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+ without it... but who knows?) */
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+ ATARIHW_DECLARE(TT_MFP); /* 2nd MFP */
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+ ATARIHW_DECLARE(SCC); /* Serial Communications Contr. */
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+ ATARIHW_DECLARE(ST_ESCC); /* SCC Z83230 in an ST */
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+ ATARIHW_DECLARE(ANALOG_JOY); /* Paddle Interface for STe
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+ and Falcon */
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+ ATARIHW_DECLARE(MICROWIRE); /* Microwire Interface */
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+ /* DMA */
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+ ATARIHW_DECLARE(STND_DMA); /* 24 Bit limited ST-DMA */
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+ ATARIHW_DECLARE(EXTD_DMA); /* 32 Bit ST-DMA */
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+ ATARIHW_DECLARE(SCSI_DMA); /* DMA for the NCR5380 */
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+ ATARIHW_DECLARE(SCC_DMA); /* DMA for the SCC */
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+ /* real time clocks */
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+ ATARIHW_DECLARE(TT_CLK); /* TT compatible clock chip */
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+ ATARIHW_DECLARE(MSTE_CLK); /* Mega ST(E) clock chip */
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+ /* supporting hardware */
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+ ATARIHW_DECLARE(SCU); /* System Control Unit */
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+ ATARIHW_DECLARE(BLITTER); /* Blitter */
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+ ATARIHW_DECLARE(VME); /* VME Bus */
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+ ATARIHW_DECLARE(DSP56K); /* DSP56k processor in Falcon */
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+};
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+
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+extern struct atari_hw_present atari_hw_present;
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+
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+
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+/* Reading the MFP port register gives a machine independent delay, since the
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+ * MFP always has a 8 MHz clock. This avoids problems with the varying length
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+ * of nops on various machines. Somebody claimed that the tstb takes 600 ns.
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+ */
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+#define MFPDELAY() \
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+ __asm__ __volatile__ ( "tstb %0" : : "m" (st_mfp.par_dt_reg) : "cc" );
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+
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+/* Do cache push/invalidate for DMA read/write. This function obeys the
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+ * snooping on some machines (Medusa) and processors: The Medusa itself can
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+ * snoop, but only the '040 can source data from its cache to DMA writes i.e.,
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+ * reads from memory). Both '040 and '060 invalidate cache entries on snooped
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+ * DMA reads (i.e., writes to memory).
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+ */
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+
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+
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+#define atari_readb raw_inb
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+#define atari_writeb raw_outb
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+
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+#define atari_inb_p raw_inb
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+#define atari_outb_p raw_outb
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+
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+
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+
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+#include <linux/mm.h>
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+#include <asm/cacheflush.h>
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+
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+static inline void dma_cache_maintenance( unsigned long paddr,
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+ unsigned long len,
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+ int writeflag )
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+
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+{
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+ if (writeflag) {
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+ if (!MACH_IS_MEDUSA || CPU_IS_060)
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+ cache_push( paddr, len );
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+ }
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+ else {
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+ if (!MACH_IS_MEDUSA)
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+ cache_clear( paddr, len );
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+ }
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+}
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+
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+
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+/*
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+** Shifter
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+ */
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