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Annotation of XNU/osfmk/i386/machine_routines.c, revision 1.1.1.1

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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