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/* SPDX-License-Identifier: GPL-2.0 */
/*
* sbi.h: SBI (Sbus Interface on sun4d) definitions
*
* Copyright (C) 1997 Jakub Jelinek <[email protected]>
*/
#ifndef _SPARC_SBI_H
#define _SPARC_SBI_H
#include <asm/obio.h>
/* SBI */
struct sbi_regs {
/* 0x0000 */ u32 cid; /* Component ID */
/* 0x0004 */ u32 ctl; /* Control */
/* 0x0008 */ u32 status; /* Status */
u32 _unused1;
/* 0x0010 */ u32 cfg0; /* Slot0 config reg */
/* 0x0014 */ u32 cfg1; /* Slot1 config reg */
/* 0x0018 */ u32 cfg2; /* Slot2 config reg */
/* 0x001c */ u32 cfg3; /* Slot3 config reg */
/* 0x0020 */ u32 stb0; /* Streaming buf control for slot 0 */
/* 0x0024 */ u32 stb1; /* Streaming buf control for slot 1 */
/* 0x0028 */ u32 stb2; /* Streaming buf control for slot 2 */
/* 0x002c */ u32 stb3; /* Streaming buf control for slot 3 */
/* 0x0030 */ u32 intr_state; /* Interrupt state */
/* 0x0034 */ u32 intr_tid; /* Interrupt target ID */
/* 0x0038 */ u32 intr_diag; /* Interrupt diagnostics */
};
#define SBI_CID 0x02800000
#define SBI_CTL 0x02800004
#define SBI_STATUS 0x02800008
#define SBI_CFG0 0x02800010
#define SBI_CFG1 0x02800014
#define SBI_CFG2 0x02800018
#define SBI_CFG3 0x0280001c
#define SBI_STB0 0x02800020
#define SBI_STB1 0x02800024
#define SBI_STB2 0x02800028
#define SBI_STB3 0x0280002c
#define SBI_INTR_STATE 0x02800030
#define SBI_INTR_TID 0x02800034
#define SBI_INTR_DIAG 0x02800038
/* Burst bits for 8, 16, 32, 64 are in cfgX registers at bits 2, 3, 4, 5 respectively */
#define SBI_CFG_BURST_MASK 0x0000001e
/* How to make devid from sbi no */
#define SBI2DEVID(sbino) ((sbino<<4)|2)
/* intr_state has 4 bits for slots 0 .. 3 and these bits are repeated for each sbus irq level
*
* +-------+-------+-------+-------+-------+-------+-------+-------+
* SBUS IRQ LEVEL | 7 | 6 | 5 | 4 | 3 | 2 | 1 | |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Reser |
* SLOT # |3|2|1|0|3|2|1|0|3|2|1|0|3|2|1|0|3|2|1|0|3|2|1|0|3|2|1|0| ved |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-------+
* Bits 31 27 23 19 15 11 7 3 0
*/
#ifndef __ASSEMBLY__
static inline int acquire_sbi(int devid, int mask)
{
__asm__ __volatile__ ("swapa [%2] %3, %0" :
"=r" (mask) :
"0" (mask),
"r" (ECSR_DEV_BASE(devid) | SBI_INTR_STATE),
"i" (ASI_M_CTL));
return mask;
}
static inline void release_sbi(int devid, int mask)
{
__asm__ __volatile__ ("sta %0, [%1] %2" : :
"r" (mask),
"r" (ECSR_DEV_BASE(devid) | SBI_INTR_STATE),
"i" (ASI_M_CTL));
}
static inline void set_sbi_tid(int devid, int targetid)
{
__asm__ __volatile__ ("sta %0, [%1] %2" : :
"r" (targetid),
"r" (ECSR_DEV_BASE(devid) | SBI_INTR_TID),
"i" (ASI_M_CTL));
}
static inline int get_sbi_ctl(int devid, int cfgno)
{
int cfg;
__asm__ __volatile__ ("lda [%1] %2, %0" :
"=r" (cfg) :
"r" ((ECSR_DEV_BASE(devid) | SBI_CFG0) + (cfgno<<2)),
"i" (ASI_M_CTL));
return cfg;
}
static inline void set_sbi_ctl(int devid, int cfgno, int cfg)
{
__asm__ __volatile__ ("sta %0, [%1] %2" : :
"r" (cfg),
"r" ((ECSR_DEV_BASE(devid) | SBI_CFG0) + (cfgno<<2)),
"i" (ASI_M_CTL));
}
#endif /* !__ASSEMBLY__ */
#endif /* !(_SPARC_SBI_H) */
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