1,5 → 1,6 |
/* |
* Copyright (c) 2006 Jakub Jermar |
* Copyright (c) 2008 Jakub vana |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
35,13 → 36,18 |
#include <ddi/ddi.h> |
#include <proc/task.h> |
#include <arch/types.h> |
#include <mm/slab.h> |
#include <errno.h> |
|
#define IO_MEMMAP_PAGES 16384 |
#define PORTS_PER_PAGE 4 |
|
/** Enable I/O space range for task. |
* |
* Interrupts are disabled and task is locked. |
* |
* @param task Task. |
* @param ioaddr Startign I/O space address. |
* @param ioaddr Starting I/O space address. |
* @param size Size of the enabled I/O range. |
* |
* @return 0 on success or an error code from errno.h. |
48,6 → 54,21 |
*/ |
int ddi_iospace_enable_arch(task_t *task, uintptr_t ioaddr, size_t size) |
{ |
if (!task->arch.iomap) { |
uint8_t *map; |
|
task->arch.iomap = malloc(sizeof(bitmap_t), 0); |
map = malloc(BITS2BYTES(IO_MEMMAP_PAGES), 0); |
if(!map) |
return ENOMEM; |
bitmap_initialize(task->arch.iomap, map, IO_MEMMAP_PAGES); |
bitmap_clear_range(task->arch.iomap, 0, IO_MEMMAP_PAGES); |
} |
|
uintptr_t iopage = ioaddr / PORTS_PER_PAGE; |
size = ALIGN_UP(size + ioaddr - 4 * iopage, PORTS_PER_PAGE); |
bitmap_set_range(task->arch.iomap, iopage, size / 4); |
|
return 0; |
} |
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