| 111,18 → 111,86 |
|---|
| return 0; |
| } |
| |
| /** Enable range of I/O space for task. |
| * |
| * @param id Task ID of the destination task. |
| * @param ioaddr Starting I/O address. |
| * @param size Size of the enabled I/O space.. |
| * |
| * @return 0 on success, EPERM if the caller lacks capabilities to use this syscall, |
| * ENOENT if there is no task matching the specified ID. |
| */ |
| static int ddi_enable_iospace(task_id_t id, __address ioaddr, size_t size) |
| { |
| ipl_t ipl; |
| cap_t caps; |
| task_t *t; |
| int rc; |
| |
| /* |
| * Make sure the caller is authorised to make this syscall. |
| */ |
| caps = cap_get(TASK); |
| if (!(caps & CAP_IO_MANAGER)) |
| return EPERM; |
| |
| ipl = interrupts_disable(); |
| spinlock_lock(&tasks_lock); |
| |
| t = task_find_by_id(id); |
| |
| if (!t) { |
| /* |
| * There is no task with the specified ID. |
| */ |
| spinlock_unlock(&tasks_lock); |
| interrupts_restore(ipl); |
| return ENOENT; |
| } |
| |
| /* |
| * TODO: We are currently lacking support for task destroying. |
| * Once it is added to the kernel, we must take care to |
| * synchronize in a way that prevents race conditions here. |
| */ |
| |
| /* Lock the task and release the lock protecting tasks_btree. */ |
| spinlock_lock(&t->lock); |
| spinlock_unlock(&tasks_lock); |
| |
| rc = ddi_enable_iospace_arch(t, ioaddr, size); |
| |
| spinlock_unlock(&t->lock); |
| interrupts_restore(ipl); |
| return rc; |
| } |
| |
| /** Wrapper for SYS_MAP_PHYSMEM syscall. |
| * |
| * @param User space address of DDI argument structure. |
| * @param User space address of memory DDI argument structure. |
| * |
| * @return 0 on success, otherwise it returns error code found in errno.h |
| */ |
| __native sys_map_physmem(ddi_arg_t *uspace_ddi_arg) |
| __native sys_map_physmem(ddi_memarg_t *uspace_mem_arg) |
| { |
| ddi_arg_t arg; |
| ddi_memarg_t arg; |
| |
| copy_from_uspace(&arg, uspace_ddi_arg, sizeof(ddi_arg_t)); |
| copy_from_uspace(&arg, uspace_mem_arg, sizeof(ddi_memarg_t)); |
| return (__native) ddi_map_physmem((task_id_t) arg.task_id, ALIGN_DOWN((__address) arg.phys_base, FRAME_SIZE), |
| ALIGN_DOWN((__address) arg.virt_base, PAGE_SIZE), (count_t) arg.pages, |
| (bool) arg.writable); |
| } |
| |
| /** Wrapper for SYS_ENABLE_IOSPACE syscall. |
| * |
| * @param User space address of DDI argument structure. |
| * |
| * @return 0 on success, otherwise it returns error code found in errno.h |
| */ |
| __native sys_enable_iospace(ddi_ioarg_t *uspace_io_arg) |
| { |
| ddi_ioarg_t arg; |
| |
| copy_from_uspace(&arg, uspace_io_arg, sizeof(ddi_ioarg_t)); |
| return (__native) ddi_enable_iospace((task_id_t) arg.task_id, (__address) arg.ioaddr, (size_t) arg.size); |
| } |