/* SPDX-License-Identifier: GPL-2.0 */
/*
* OSS
*
* This is used in place of VIA2 on the IIfx.
*/
#define OSS_BASE (0 x50f1a000)
/*
* Interrupt level offsets for mac_oss->irq_level
*/
#define OSS_NUBUS0 0
#define OSS_NUBUS1 1
#define OSS_NUBUS2 2
#define OSS_NUBUS3 3
#define OSS_NUBUS4 4
#define OSS_NUBUS5 5
#define OSS_IOPISM 6
#define OSS_IOPSCC 7
#define OSS_SOUND 8
#define OSS_SCSI 9
#define OSS_60HZ 10
#define OSS_VIA1 11
#define OSS_UNUSED1 12
#define OSS_UNUSED2 13
#define OSS_PARITY 14
#define OSS_UNUSED3 15
#define OSS_NUM_SOURCES 16
/*
* Pending interrupt bits in mac_oss->irq_pending
*/
#define OSS_IP_NUBUS0 0 x0001
#define OSS_IP_NUBUS1 0 x0002
#define OSS_IP_NUBUS2 0 x0004
#define OSS_IP_NUBUS3 0 x0008
#define OSS_IP_NUBUS4 0 x0010
#define OSS_IP_NUBUS5 0 x0020
#define OSS_IP_IOPISM 0 x0040
#define OSS_IP_IOPSCC 0 x0080
#define OSS_IP_SOUND 0 x0100
#define OSS_IP_SCSI 0 x0200
#define OSS_IP_60HZ 0 x0400
#define OSS_IP_VIA1 0 x0800
#define OSS_IP_UNUSED1 0 x1000
#define OSS_IP_UNUSED2 0 x2000
#define OSS_IP_PARITY 0 x4000
#define OSS_IP_UNUSED3 0 x8000
#define OSS_IP_NUBUS (OSS_IP_NUBUS0|OSS_IP_NUBUS1|OSS_IP_NUBUS2|OSS_IP_NUBUS3|OSS_IP_NUBUS4|OSS_IP_NUBUS5)
/*
* Rom Control Register
*/
#define OSS_POWEROFF 0 x80
#ifndef __ASSEMBLER__
struct mac_oss {
__u8 irq_level[0 x10]; /* [0x000-0x00f] Interrupt levels */
__u8 padding0[0 x1F2]; /* [0x010-0x201] IO space filler */
__u16 irq_pending; /* [0x202-0x203] pending interrupts bits */
__u8 rom_ctrl; /* [0x204-0x204] ROM cntl reg (for poweroff) */
__u8 padding1[0 x2]; /* [0x205-0x206] currently unused by A/UX */
__u8 ack_60hz; /* [0x207-0x207] 60 Hz ack. */
};
extern volatile struct mac_oss *oss;
extern int oss_present;
extern void oss_register_interrupts(void );
extern void oss_irq_enable(int );
extern void oss_irq_disable(int );
#endif /* __ASSEMBLER__ */
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(vorverarbeitet am 2026-06-08)
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