generic
[Device Driver Interface]

Files
file	ddi.h
file	ddi_arg.h
file	ddi.c
	Device Driver Interface functions.
Data Structures
struct	ddi_memarg_t
struct	ddi_ioarg_t
Functions
__native	sys_physmem_map (__native phys_base, __native virt_base, __native pages, __native flags)
__native	sys_iospace_enable (ddi_ioarg_t *uspace_io_arg)
__native	sys_preempt_control (int enable)
int	ddi_iospace_enable_arch (task_t *task, __address ioaddr, size_t size)
static int	ddi_physmem_map (__address pf, __address vp, count_t pages, int flags)
static int	ddi_iospace_enable (task_id_t id, __address ioaddr, size_t size)

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Function Documentation

static int ddi_iospace_enable (  task_id_t  id, __address  ioaddr, size_t  size )  [static]

Enable range of I/O space for task. Parameters: id  Task ID of the destination task. ioaddr  Starting I/O address. size  Size of the enabled I/O space.. Returns: 0 on success, EPERM if the caller lacks capabilities to use this syscall, ENOENT if there is no task matching the specified ID. Definition at line 113 of file ddi.c. References cap_get(), CAP_IO_MANAGER, ddi_iospace_enable_arch(), ENOENT, EPERM, interrupts_disable(), interrupts_restore(), spinlock_lock, spinlock_unlock(), TASK, task_find_by_id(), and tasks_lock. Referenced by sys_iospace_enable(). Here is the call graph for this function:

int ddi_iospace_enable_arch (  task_t *  task, __address  ioaddr, size_t  size )

Enable I/O space range for task. Interrupts are disabled and task is locked. Parameters: task  Task. ioaddr  Startign I/O space address. size  Size of the enabled I/O range. Returns: 0 on success or an error code from errno.h. Definition at line 50 of file ddi.c. Referenced by ddi_iospace_enable().

static int ddi_physmem_map (  __address  pf, __address  vp, count_t  pages, int  flags )  [static]

Map piece of physical memory into virtual address space of current task. Parameters: pf  Physical frame address of the starting frame. vp  Virtual page address of the starting page. pages  Number of pages to map. flags  Address space area flags for the mapping. Returns: 0 on success, EPERM if the caller lacks capabilities to use this syscall, ENOENT if there is no task matching the specified ID and ENOMEM if there was a problem in creating address space area. Definition at line 65 of file ddi.c. References as_area_create(), cap_get(), CAP_MEM_MANAGER, ENOMEM, EPERM, interrupts_disable(), interrupts_restore(), PAGE_SIZE, phys_backend, spinlock_lock, spinlock_unlock(), and TASK. Referenced by sys_physmem_map(). Here is the call graph for this function:

__native sys_iospace_enable (  ddi_ioarg_t *  uspace_io_arg  )

Wrapper for SYS_ENABLE_IOSPACE syscall. Parameters: uspace_io_arg  User space address of DDI argument structure. Returns: 0 on success, otherwise it returns error code found in errno.h Definition at line 175 of file ddi.c. References copy_from_uspace(), ddi_iospace_enable(), ddi_ioarg_t::ioaddr, ddi_ioarg_t::size, and ddi_ioarg_t::task_id. Here is the call graph for this function:

__native sys_physmem_map (  __native  phys_base, __native  virt_base, __native  pages, __native  flags )

Wrapper for SYS_MAP_PHYSMEM syscall. Parameters: phys_base  Physical base address to map virt_base  Destination virtual address pages  Number of pages flags  Flags of newly mapped pages Returns: 0 on success, otherwise it returns error code found in errno.h Definition at line 161 of file ddi.c. References ALIGN_DOWN, ddi_physmem_map(), FRAME_SIZE, and PAGE_SIZE. Here is the call graph for this function:

__native sys_preempt_control (  int  enable  )

Disable or enable preemption. Parameters: enable  If non-zero, the preemption counter will be decremented, leading to potential enabling of preemption. Otherwise the preemption counter will be incremented, preventing preemption from occurring. Returns: Zero on success or EPERM if callers capabilities are not sufficient. Definition at line 195 of file ddi.c. References cap_get(), CAP_PREEMPT_CONTROL, EPERM, preemption_disable(), preemption_enable(), and TASK. Here is the call graph for this function:

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