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Annotation of XNU/osfmk/i386/machine_routines.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: #include <i386/machine_routines.h>
        !            23: #include <i386/io_map_entries.h>
        !            24: #include <kern/cpu_data.h>
        !            25: 
        !            26: /* IO memory map services */
        !            27: 
        !            28: /* Map memory map IO space */
        !            29: vm_offset_t ml_io_map(
        !            30:        vm_offset_t phys_addr, 
        !            31:        vm_size_t size)
        !            32: {
        !            33:        return(io_map(phys_addr,size));
        !            34: }
        !            35: 
        !            36: /* boot memory allocation */
        !            37: vm_offset_t ml_static_malloc(
        !            38:        vm_size_t size)
        !            39: {
        !            40:        return((vm_offset_t)NULL);
        !            41: }
        !            42: 
        !            43: vm_offset_t
        !            44: ml_static_ptovirt(
        !            45:        vm_offset_t paddr)
        !            46: {
        !            47:        return phystokv(paddr);
        !            48: } 
        !            49: 
        !            50: void
        !            51: ml_static_mfree(
        !            52:         vm_offset_t vaddr,
        !            53:         vm_size_t size)
        !            54: {
        !            55:        return;
        !            56: }
        !            57: 
        !            58: /* virtual to physical on wired pages */
        !            59: vm_offset_t ml_vtophys(
        !            60:        vm_offset_t vaddr)
        !            61: {
        !            62:        return  kvtophys(vaddr);
        !            63: }
        !            64: 
        !            65: /* Interrupt handling */
        !            66: 
        !            67: /* Get Interrupts Enabled */
        !            68: boolean_t ml_get_interrupts_enabled(void)
        !            69: {
        !            70:   unsigned long flags;
        !            71: 
        !            72:   __asm__ volatile("pushf; popl        %0" :  "=r" (flags));
        !            73:   return (flags & EFL_IF) != 0;
        !            74: }
        !            75: 
        !            76: /* Set Interrupts Enabled */
        !            77: boolean_t ml_set_interrupts_enabled(boolean_t enable)
        !            78: {
        !            79:   unsigned long flags;
        !            80: 
        !            81:   __asm__ volatile("pushf; popl        %0" :  "=r" (flags));
        !            82: 
        !            83:  if (enable)
        !            84:        __asm__ volatile("sti");
        !            85:   else
        !            86:        __asm__ volatile("cli");
        !            87: 
        !            88:   return (flags & EFL_IF) != 0;
        !            89: }
        !            90: 
        !            91: /* Check if running at interrupt context */
        !            92: boolean_t ml_at_interrupt_context(void)
        !            93: {
        !            94:        return get_interrupt_level() != 0;
        !            95: }
        !            96: 
        !            97: /* Generate a fake interrupt */
        !            98: void ml_cause_interrupt(void)
        !            99: {
        !           100:        panic("ml_cause_interrupt not defined yet on Intel");
        !           101: }
        !           102: 
        !           103: /* Initialize Interrupts */
        !           104: void ml_install_interrupt_handler(
        !           105:        void *nub,
        !           106:        int source,
        !           107:        void *target,
        !           108:        IOInterruptHandler handler,
        !           109:        void *refCon)  
        !           110: {
        !           111:        boolean_t current_state;
        !           112: 
        !           113:        current_state = ml_get_interrupts_enabled();
        !           114: 
        !           115:        PE_install_interrupt_handler(nub, source, target,
        !           116:                                     (IOInterruptHandler) handler, refCon);
        !           117: 
        !           118:        (void) ml_set_interrupts_enabled(current_state);
        !           119: }

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