| 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 |
| 35,19 → 36,39 |
|---|
| #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 size Size of the enabled I/O range. |
| * @param task Task. |
| * @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. |
| */ |
| 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; |
| } |
| |