acpi_cpu.h revision 1.5 
1/* $NetBSD: acpi_cpu.h,v 1.5 2010/07/23 08:11:49 jruoho Exp $ */
2
3/*-
4 * Copyright (c) 2010 Jukka Ruohonen <jruohonen@iki.fi>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#ifndef _SYS_DEV_ACPI_ACPI_CPU_H
31#define _SYS_DEV_ACPI_ACPI_CPU_H
32
33/*
34 * The following _PDC values are based on:
35 *
36 *   Intel Processor-Specific ACPI Interface
37 *   Specification, September 2006, Revision 005.
38 */
39#define ACPICPU_PDC_REVID         0x1
40#define ACPICPU_PDC_SMP           0xA
41#define ACPICPU_PDC_MSR           0x1
42
43#define ACPICPU_PDC_P_FFH         __BIT(0)	/* SpeedStep MSRs            */
44#define ACPICPU_PDC_C_C1_HALT     __BIT(1)	/* C1 "I/O then halt"        */
45#define ACPICPU_PDC_T_FFH         __BIT(2)	/* OnDemand throttling MSRs  */
46#define ACPICPU_PDC_C_C1PT        __BIT(3)	/* SMP C1, Px, and Tx (same) */
47#define ACPICPU_PDC_C_C2C3        __BIT(4)	/* SMP C2 and C3 (same)      */
48#define ACPICPU_PDC_P_SW          __BIT(5)	/* SMP Px (different)        */
49#define ACPICPU_PDC_C_SW          __BIT(6)	/* SMP Cx (different)        */
50#define ACPICPU_PDC_T_SW          __BIT(7)	/* SMP Tx (different)        */
51#define ACPICPU_PDC_C_C1_FFH      __BIT(8)	/* SMP C1 native beyond halt */
52#define ACPICPU_PDC_C_C2C3_FFH    __BIT(9)	/* SMP C2 and C2 native      */
53#define ACPICPU_PDC_P_HW          __BIT(11)	/* Px hardware coordination  */
54
55/*
56 * See ibid., table 4.
57 */
58#define ACPICPU_PDC_GAS_HW	  __BIT(0)	/* hw-coordinated state      */
59#define ACPICPU_PDC_GAS_BM	  __BIT(1)	/* bus master check required */
60
61/*
62 * Notify values.
63 */
64#define ACPICPU_P_NOTIFY	 0x80		/* _PPC */
65#define ACPICPU_C_NOTIFY	 0x81		/* _CST */
66#define ACPICPU_T_NOTIFY	 0x82		/* _TPC */
67
68/*
69 * C-states.
70 */
71#define ACPICPU_C_C2_LATENCY_MAX 100		/* us */
72#define ACPICPU_C_C3_LATENCY_MAX 1000		/* us */
73
74#define ACPICPU_C_CSD_SW_ALL	 0xFC
75#define ACPICPU_C_CSD_SW_ANY	 0xFD
76#define ACPICPU_C_CSD_HW_ALL	 0xFE
77
78#define ACPICPU_C_STATE_HALT	 0x01
79#define ACPICPU_C_STATE_FFH	 0x02
80#define ACPICPU_C_STATE_SYSIO	 0x03
81
82#define ACPICPU_FLAG_C		 __BIT(0)
83#define ACPICPU_FLAG_P		 __BIT(1)
84#define ACPICPU_FLAG_T		 __BIT(2)
85#define ACPICPU_FLAG_C_CST	 __BIT(3)
86#define ACPICPU_FLAG_C_FADT	 __BIT(4)
87#define ACPICPU_FLAG_C_BM	 __BIT(5)
88#define ACPICPU_FLAG_C_BM_STS	 __BIT(6)
89#define ACPICPU_FLAG_C_ARB	 __BIT(7)
90#define ACPICPU_FLAG_C_NOC3	 __BIT(8)
91#define ACPICPU_FLAG_C_MWAIT	 __BIT(9)
92#define ACPICPU_FLAG_C_C1E	 __BIT(10)
93
94struct acpicpu_cstate {
95	uint64_t		 cs_stat;
96	uint64_t		 cs_addr;
97	uint32_t		 cs_power;	/* mW */
98	uint32_t		 cs_latency;	/* us */
99	int			 cs_method;
100	int			 cs_flags;
101};
102
103struct acpicpu_csd {
104	uint32_t		 csd_domain;
105	uint32_t		 csd_coord;
106	uint32_t		 csd_ncpu;
107	uint32_t		 csd_index;
108};
109
110struct acpicpu_object {
111	uint32_t		 ao_procid;
112	uint32_t		 ao_pblklen;
113	uint32_t		 ao_pblkaddr;
114};
115
116struct acpicpu_softc {
117	device_t		 sc_dev;
118	struct acpi_devnode	*sc_node;
119	struct acpicpu_cstate	 sc_cstate[ACPI_C_STATE_COUNT];
120	struct acpicpu_object	 sc_object;
121	bus_space_tag_t		 sc_iot;
122	bus_space_handle_t	 sc_ioh;
123	uint32_t		 sc_sleep;
124	uint32_t		 sc_cpuid;
125	uint32_t		 sc_cap;
126	uint32_t		 sc_flags;
127};
128
129void		acpicpu_cstate_attach(device_t);
130int		acpicpu_cstate_detach(device_t);
131int		acpicpu_cstate_start(device_t);
132bool		acpicpu_cstate_suspend(device_t);
133bool		acpicpu_cstate_resume(device_t);
134void		acpicpu_cstate_callback(void *);
135void		acpicpu_cstate_idle(void);
136
137uint32_t	acpicpu_md_cap(void);
138uint32_t	acpicpu_md_quirks(void);
139uint32_t	acpicpu_md_cpus_running(void);
140int		acpicpu_md_idle_init(void);
141int		acpicpu_md_idle_start(void);
142int		acpicpu_md_idle_stop(void);
143void		acpicpu_md_idle_enter(int, int);
144
145#endif	/* !_SYS_DEV_ACPI_ACPI_CPU_H */
146