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freebsd-dev/sys/alpha/include/alpha_cpu.h
Doug Rabson 99d11cde56 Major changes to the generic device framework for FreeBSD/alpha: 
* Eliminate bus_t and make it possible for all devices to have
  attached children.

* Support dynamically extendable interfaces for drivers to replace
  both the function pointers in driver_t and bus_ops_t (which has been
  removed entirely.  Two system defined interfaces have been defined,
  'device' which is mandatory for all devices and 'bus' which is
  recommended for all devices which support attached children.

* In addition, the alpha port defines two simple interfaces 'clock'
  for attaching various real time clocks to the system and 'mcclock'
  for the many different variations of mc146818 clocks which can be
  attached to different alpha platforms.  This eliminates two more
  function pointer tables in favour of the generic method dispatch
  system provided by the device framework.

Future device interfaces may include:

* cdev and bdev interfaces for devfs to use in replacement for specfs
  and the fixed interfaces bdevsw and cdevsw.

* scsi interface to replace struct scsi_adapter (not sure how this
  works in CAM but I imagine there is something similar there).

* various tailored interfaces for different bus types such as pci,
  isa, pccard etc.
1998-06-14 13:46:10 +00:00

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/* $Id: alpha_cpu.h,v 1.2 1998/06/10 10:54:21 dfr Exp $ */
/* From: NetBSD: alpha_cpu.h,v 1.15 1997/09/20 19:02:34 mjacob Exp */
/*
* Copyright (c) 1996 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#ifndef __ALPHA_ALPHA_CPU_H__
#define __ALPHA_ALPHA_CPU_H__
/*
* Alpha CPU + OSF/1 PALcode definitions for use by the kernel.
*
* Definitions for:
*
* Process Control Block
* Interrupt/Exception/Syscall Stack Frame
* Processor Status Register
* Machine Check Error Summary Register
* Machine Check Logout Area
* Virtual Memory Management
* Kernel Entry Vectors
* MMCSR Fault Type Codes
* Translation Buffer Invalidation
*
* and miscellaneous PALcode operations.
*/
/*
* Process Control Block definitions [OSF/1 PALcode Specific]
*/
struct alpha_pcb {
unsigned long apcb_ksp; /* kernel stack ptr */
unsigned long apcb_usp; /* user stack ptr */
unsigned long apcb_ptbr; /* page table base reg */
unsigned int apcb_cpc; /* charged process cycles */
unsigned int apcb_asn; /* address space number */
unsigned long apcb_unique; /* process unique value */
unsigned long apcb_flags; /* flags; see below */
unsigned long apcb_decrsv0; /* DEC reserved */
unsigned long apcb_decrsv1; /* DEC reserved */
};
#define ALPHA_PCB_FLAGS_FEN 0x0000000000000001
#define ALPHA_PCB_FLAGS_PME 0x4000000000000000
/*
* Interrupt/Exception/Syscall "Hardware" (really PALcode)
* Stack Frame definitions
*
* These are quadword offsets from the sp on kernel entry, i.e.
* to get to the value in question you access (sp + (offset * 8)).
*
* On syscall entry, A0-A2 aren't written to memory but space
* _is_ reserved for them.
*/
#define ALPHA_HWFRAME_PS 0 /* processor status register */
#define ALPHA_HWFRAME_PC 1 /* program counter */
#define ALPHA_HWFRAME_GP 2 /* global pointer */
#define ALPHA_HWFRAME_A0 3 /* a0 */
#define ALPHA_HWFRAME_A1 4 /* a1 */
#define ALPHA_HWFRAME_A2 5 /* a2 */
#define ALPHA_HWFRAME_SIZE 6 /* 6 8-byte words */
/*
* Processor Status Register [OSF/1 PALcode Specific]
*
* Includes user/kernel mode bit, interrupt priority levels, etc.
*/
#define ALPHA_PSL_USERMODE 0x0008 /* set -> user mode */
#define ALPHA_PSL_IPL_MASK 0x0007 /* interrupt level mask */
#define ALPHA_PSL_IPL_0 0x0000 /* all interrupts enabled */
#define ALPHA_PSL_IPL_SOFT 0x0001 /* software ints disabled */
#define ALPHA_PSL_IPL_IO 0x0004 /* I/O dev ints disabled */
#define ALPHA_PSL_IPL_CLOCK 0x0005 /* clock ints disabled */
#define ALPHA_PSL_IPL_HIGH 0x0006 /* all but mchecks disabled */
#define ALPHA_PSL_MUST_BE_ZERO 0xfffffffffffffff0
/* Convenience constants: what must be set/clear in user mode */
#define ALPHA_PSL_USERSET ALPHA_PSL_USERMODE
#define ALPHA_PSL_USERCLR (ALPHA_PSL_MUST_BE_ZERO | ALPHA_PSL_IPL_MASK)
/*
* Interrupt Type Code Definitions [OSF/1 PALcode Specific]
*/
#define ALPHA_INTR_XPROC 0 /* interprocessor interrupt */
#define ALPHA_INTR_CLOCK 1 /* clock interrupt */
#define ALPHA_INTR_ERROR 2 /* correctable error or mcheck */
#define ALPHA_INTR_DEVICE 3 /* device interrupt */
#define ALPHA_INTR_PERF 4 /* performance counter */
#define ALPHA_INTR_PASSIVE 5 /* passive release */
/*
* Machine Check Error Summary Register definitions [OSF/1 PALcode Specific]
*
* The following bits are values as read. On write, _PCE, _SCE, and
* _MIP are "write 1 to clear."
*/
#define ALPHA_MCES_IMP \
0xffffffff00000000 /* impl. dependent */
#define ALPHA_MCES_RSVD \
0x00000000ffffffe0 /* reserved */
#define ALPHA_MCES_DSC \
0x0000000000000010 /* disable system correctable error reporting */
#define ALPHA_MCES_DPC \
0x0000000000000008 /* disable processor correctable error reporting */
#define ALPHA_MCES_PCE \
0x0000000000000004 /* processor correctable error in progress */
#define ALPHA_MCES_SCE \
0x0000000000000002 /* system correctable error in progress */
#define ALPHA_MCES_MIP \
0x0000000000000001 /* machine check in progress */
/*
* Machine Check Error Summary Register definitions [OSF/1 PALcode Specific]
*/
struct alpha_logout_area {
unsigned int la_frame_size; /* frame size */
unsigned int la_flags; /* flags; see below */
unsigned int la_cpu_offset; /* offset to cpu area */
unsigned int la_system_offset; /* offset to system area */
};
#define ALPHA_LOGOUT_FLAGS_RETRY 0x80000000 /* OK to continue */
#define ALPHA_LOGOUT_FLAGS_SE 0x40000000 /* second error */
#define ALPHA_LOGOUT_FLAGS_SBZ 0x3fffffff /* should be zero */
#define ALPHA_LOGOUT_NOT_BUILT \
(struct alpha_logout_area *)0xffffffffffffffff)
#define ALPHA_LOGOUT_PAL_AREA(lap) \
(unsigned long *)((unsigned char *)(lap) + 16)
#define ALPHA_LOGOUT_PAL_SIZE(lap) \
((lap)->la_cpu_offset - 16)
#define ALPHA_LOGOUT_CPU_AREA(lap) \
(unsigned long *)((unsigned char *)(lap) + (lap)->la_cpu_offset)
#define ALPHA_LOGOUT_CPU_SIZE(lap) \
((lap)->la_system_offset - (lap)->la_cpu_offset)
#define ALPHA_LOGOUT_SYSTEM_AREA(lap) \
(unsigned long *)((unsigned char *)(lap) + (lap)->la_system_offset)
#define ALPHA_LOGOUT_SYSTEM_SIZE(lap) \
((lap)->la_frame_size - (lap)->la_system_offset)
/*
* Virtual Memory Management definitions [OSF/1 PALcode Specific]
*
* Includes user and kernel space addresses and information,
* page table entry definitions, etc.
*
* NOTE THAT THESE DEFINITIONS MAY CHANGE IN FUTURE ALPHA CPUS!
*/
#define ALPHA_PGSHIFT 13 /* bits that index within page */
#define ALPHA_PTSHIFT 10 /* bits that index within page tables */
#define ALPHA_PGBYTES (1 << ALPHA_PGSHIFT)
#define ALPHA_L3SHIFT ALPHA_PGSHIFT
#define ALPHA_L2SHIFT (ALPHA_L3SHIFT+ALPHA_PTSHIFT)
#define ALPHA_L1SHIFT (ALPHA_L2SHIFT+ALPHA_PTSHIFT)
#define ALPHA_USEG_BASE 0 /* virtual */
#define ALPHA_USEG_END 0x000003ffffffffffLL
#define ALPHA_K0SEG_BASE 0xfffffc0000000000LL /* direct-mapped */
#define ALPHA_K0SEG_END 0xfffffdffffffffffLL
#define ALPHA_K1SEG_BASE 0xfffffe0000000000LL /* virtual */
#define ALPHA_K1SEG_END 0xffffffffffffffffLL
#define ALPHA_K0SEG_TO_PHYS(x) ((x) & ~ALPHA_K0SEG_BASE)
#define ALPHA_PHYS_TO_K0SEG(x) ((x) | ALPHA_K0SEG_BASE)
#define ALPHA_PTE_VALID 0x0001
#define ALPHA_PTE_FAULT_ON_READ 0x0002
#define ALPHA_PTE_FAULT_ON_WRITE 0x0004
#define ALPHA_PTE_FAULT_ON_EXECUTE 0x0008
#define ALPHA_PTE_ASM 0x0010 /* addr. space match */
#define ALPHA_PTE_GRANULARITY 0x0060 /* granularity hint */
#define ALPHA_PTE_PROT 0xff00
#define ALPHA_PTE_KR 0x0100
#define ALPHA_PTE_UR 0x0200
#define ALPHA_PTE_KW 0x1000
#define ALPHA_PTE_UW 0x2000
#define ALPHA_PTE_WRITE (ALPHA_PTE_KW | ALPHA_PTE_UW)
#define ALPHA_PTE_SOFTWARE 0xffff0000
#define ALPHA_PTE_PFN 0xffffffff00000000
#define ALPHA_PTE_TO_PFN(pte) ((u_long)(pte) >> 32)
#define ALPHA_PTE_FROM_PFN(pfn) ((u_long)(pfn) << 32)
typedef unsigned long alpha_pt_entry_t;
/*
* Kernel Entry Vectors. [OSF/1 PALcode Specific]
*/
#define ALPHA_KENTRY_INT 0
#define ALPHA_KENTRY_ARITH 1
#define ALPHA_KENTRY_MM 2
#define ALPHA_KENTRY_IF 3
#define ALPHA_KENTRY_UNA 4
#define ALPHA_KENTRY_SYS 5
/*
* MMCSR Fault Type Codes. [OSF/1 PALcode Specific]
*/
#define ALPHA_MMCSR_INVALTRANS 0
#define ALPHA_MMCSR_ACCESS 1
#define ALPHA_MMCSR_FOR 2
#define ALPHA_MMCSR_FOE 3
#define ALPHA_MMCSR_FOW 4
/*
* Instruction Fault Type Codes. [OSF/1 PALcode Specific]
*/
#define ALPHA_IF_CODE_BPT 0
#define ALPHA_IF_CODE_BUGCHK 1
#define ALPHA_IF_CODE_GENTRAP 2
#define ALPHA_IF_CODE_FEN 3
#define ALPHA_IF_CODE_OPDEC 4
/*
* Translation Buffer Invalidation definitions [OSF/1 PALcode Specific]
*/
#define ALPHA_TBIA() alpha_pal_tbi(-2, 0) /* all TB entries */
#define ALPHA_TBIAP() alpha_pal_tbi(-1, 0) /* all per-process */
#define ALPHA_TBISI(va) alpha_pal_tbi(1, (va)) /* ITB entry for va */
#define ALPHA_TBISD(va) alpha_pal_tbi(2, (va)) /* DTB entry for va */
#define ALPHA_TBIS(va) alpha_pal_tbi(3, (va)) /* all for va */
/*
* Bits used in the amask instruction [EV56 and later]
*/
#define ALPHA_AMASK_BWX 0x0001 /* byte/word extension */
#define ALPHA_AMASK_CIX 0x0002 /* count extension */
#define ALPHA_AMASK_MAX 0x0100 /* multimedia extension */
/*
* Chip family IDs returned by implver instruction
*/
#define ALPHA_IMPLVER_EV4 0 /* LCA/EV4/EV45 */
#define ALPHA_IMPLVER_EV5 1 /* EV5/EV56/PCA56 */
#define ALPHA_IMPLVER_EV6 2 /* EV6 */
/*
* Stubs for Alpha instructions normally inaccessible from C.
*/
unsigned long alpha_amask __P((unsigned long));
unsigned long alpha_implver __P((void));
unsigned long alpha_rpcc __P((void));
void alpha_mb __P((void));
void alpha_wmb __P((void));
u_int8_t alpha_ldbu __P((volatile u_int8_t *));
u_int16_t alpha_ldwu __P((volatile u_int16_t *));
void alpha_stb __P((volatile u_int8_t *, u_int8_t));
void alpha_stw __P((volatile u_int16_t *, u_int16_t));
u_int8_t alpha_sextb __P((u_int8_t));
u_int16_t alpha_sextw __P((u_int16_t));
/*
* Stubs for OSF/1 PALcode operations.
*/
void alpha_pal_imb __P((void));
void alpha_pal_cflush __P((unsigned long));
void alpha_pal_draina __P((void));
void alpha_pal_halt __P((void)) __attribute__((__noreturn__));
unsigned long alpha_pal_rdmces __P((void));
unsigned long alpha_pal_rdps __P((void));
unsigned long alpha_pal_rdusp __P((void));
unsigned long alpha_pal_rdval __P((void));
unsigned long alpha_pal_swpctx __P((unsigned long));
unsigned long alpha_pal_swpipl __P((unsigned long));
unsigned long _alpha_pal_swpipl __P((unsigned long)); /* for profiling */
void alpha_pal_tbi __P((unsigned long, vm_offset_t));
unsigned long alpha_pal_whami __P((void));
void alpha_pal_wrent __P((void *, unsigned long));
void alpha_pal_wrfen __P((unsigned long));
void alpha_pal_wripir __P((unsigned long));
void alpha_pal_wrusp __P((unsigned long));
void alpha_pal_wrvptptr __P((unsigned long));
void alpha_pal_wrmces __P((unsigned long));
void alpha_pal_wrval __P((unsigned long));
#endif /* __ALPHA_ALPHA_CPU_H__ */
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