1/******************************************************************************
  2 *
  3 * Name: aclinuxex.h - Extra OS specific defines, etc. for Linux
  4 *
  5 *****************************************************************************/
  6
  7/*
  8 * Copyright (C) 2000 - 2016, Intel Corp.
  9 * All rights reserved.
 10 *
 11 * Redistribution and use in source and binary forms, with or without
 12 * modification, are permitted provided that the following conditions
 13 * are met:
 14 * 1. Redistributions of source code must retain the above copyright
 15 *    notice, this list of conditions, and the following disclaimer,
 16 *    without modification.
 17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 18 *    substantially similar to the "NO WARRANTY" disclaimer below
 19 *    ("Disclaimer") and any redistribution must be conditioned upon
 20 *    including a substantially similar Disclaimer requirement for further
 21 *    binary redistribution.
 22 * 3. Neither the names of the above-listed copyright holders nor the names
 23 *    of any contributors may be used to endorse or promote products derived
 24 *    from this software without specific prior written permission.
 25 *
 26 * Alternatively, this software may be distributed under the terms of the
 27 * GNU General Public License ("GPL") version 2 as published by the Free
 28 * Software Foundation.
 29 *
 30 * NO WARRANTY
 31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 41 * POSSIBILITY OF SUCH DAMAGES.
 42 */
 43
 44#ifndef __ACLINUXEX_H__
 45#define __ACLINUXEX_H__
 46
 47#ifdef __KERNEL__
 48
 49#ifndef ACPI_USE_NATIVE_DIVIDE
 50
 51#ifndef ACPI_DIV_64_BY_32
 52#define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32) \
 53	do { \
 54		u64 (__n) = ((u64) n_hi) << 32 | (n_lo); \
 55		(r32) = do_div ((__n), (d32)); \
 56		(q32) = (u32) (__n); \
 57	} while (0)
 58#endif
 59
 60#ifndef ACPI_SHIFT_RIGHT_64
 61#define ACPI_SHIFT_RIGHT_64(n_hi, n_lo) \
 62	do { \
 63		(n_lo) >>= 1; \
 64		(n_lo) |= (((n_hi) & 1) << 31); \
 65		(n_hi) >>= 1; \
 66	} while (0)
 67#endif
 68
 69#endif
 70
 71/*
 72 * Overrides for in-kernel ACPICA
 73 */
 74acpi_status __init acpi_os_initialize(void);
 75
 76acpi_status acpi_os_terminate(void);
 77
 78/*
 79 * The irqs_disabled() check is for resume from RAM.
 80 * Interrupts are off during resume, just like they are for boot.
 81 * However, boot has  (system_state != SYSTEM_RUNNING)
 82 * to quiet __might_sleep() in kmalloc() and resume does not.
 83 */
 84static inline void *acpi_os_allocate(acpi_size size)
 85{
 86	return kmalloc(size, irqs_disabled()? GFP_ATOMIC : GFP_KERNEL);
 87}
 88
 89static inline void *acpi_os_allocate_zeroed(acpi_size size)
 90{
 91	return kzalloc(size, irqs_disabled()? GFP_ATOMIC : GFP_KERNEL);
 92}
 93
 94static inline void acpi_os_free(void *memory)
 95{
 96	kfree(memory);
 97}
 98
 99static inline void *acpi_os_acquire_object(acpi_cache_t * cache)
100{
101	return kmem_cache_zalloc(cache,
102				 irqs_disabled()? GFP_ATOMIC : GFP_KERNEL);
103}
104
105static inline acpi_thread_id acpi_os_get_thread_id(void)
106{
107	return (acpi_thread_id) (unsigned long)current;
108}
109
110/*
111 * When lockdep is enabled, the spin_lock_init() macro stringifies it's
112 * argument and uses that as a name for the lock in debugging.
113 * By executing spin_lock_init() in a macro the key changes from "lock" for
114 * all locks to the name of the argument of acpi_os_create_lock(), which
115 * prevents lockdep from reporting false positives for ACPICA locks.
116 */
117#define acpi_os_create_lock(__handle) \
118	({ \
119		spinlock_t *lock = ACPI_ALLOCATE(sizeof(*lock)); \
120		if (lock) { \
121			*(__handle) = lock; \
122			spin_lock_init(*(__handle)); \
123		} \
124		lock ? AE_OK : AE_NO_MEMORY; \
125	})
126
127static inline u8 acpi_os_readable(void *pointer, acpi_size length)
128{
129	return TRUE;
130}
131
132static inline acpi_status acpi_os_initialize_command_signals(void)
133{
134	return AE_OK;
135}
136
137static inline void acpi_os_terminate_command_signals(void)
138{
139	return;
140}
141
142/*
143 * OSL interfaces added by Linux
144 */
145void early_acpi_os_unmap_memory(void __iomem * virt, acpi_size size);
146
147#endif				/* __KERNEL__ */
148
149#endif				/* __ACLINUXEX_H__ */