res.c File Reference

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Classes
struct	dde_mem_region
	va->pa mapping used to store memory regions More...
Functions
static struct resource *	l4dde26_request_region (resource_size_t start, resource_size_t n, const char *name)
	Request an IO port region.
static	LIST_HEAD (dde_mem_regions)
	List of memory regions that have been requested.
void __iomem *	ioremap (unsigned long phys_addr, unsigned long size)
	Map physical I/O region into virtual address space.
static struct resource *	l4dde26_request_mem_region (resource_size_t start, resource_size_t n, const char *name)
	Request an IO memory region.
struct resource *	__request_region (struct resource *parent, resource_size_t start, resource_size_t n, const char *name, int flags)
static void	l4dde26_release_region (resource_size_t start, resource_size_t n)
	Release IO port region.
static void	l4dde26_release_mem_region (resource_size_t start, resource_size_t n)
	Release IO memory region.
int	__check_region (struct resource *root, resource_size_t s, resource_size_t n)
void	__release_region (struct resource *root, resource_size_t start, resource_size_t n)
void __iomem *	ioremap_nocache (unsigned long offset, unsigned long size)
void	iounmap (volatile void __iomem *addr)

---

Function Documentation

int __check_region	(	struct resource *	root,
		resource_size_t	s,
		resource_size_t	n
	)

Definition at line 131 of file res.c.

void __release_region	(	struct resource *	root,
		resource_size_t	start,
		resource_size_t	n
	)

Definition at line 137 of file res.c.

struct resource* __request_region	(	struct resource *	parent,
		resource_size_t	start,
		resource_size_t	n,
		const char *	name,
		int	flags
	)			[read]

Definition at line 91 of file res.c.

void __iomem * ioremap	(	unsigned long	phys_addr,
		unsigned long	size
	)

Map physical I/O region into virtual address space.

For our sake, this only returns the virtual address belonging to the physical region, since we don't manage page tables ourselves.

Definition at line 155 of file res.c.

void __iomem* ioremap_nocache	(	unsigned long	offset,
		unsigned long	size
	)

Definition at line 171 of file res.c.

void iounmap

(

volatile void __iomem *

addr

)

Definition at line 177 of file res.c.

static void l4dde26_release_mem_region	(	resource_size_t	start,
		resource_size_t	n
	)			[static]

Release IO memory region.

Definition at line 124 of file res.c.

static void l4dde26_release_region	(	resource_size_t	start,
		resource_size_t	n
	)			[static]

Release IO port region.

Definition at line 113 of file res.c.

static struct resource* l4dde26_request_mem_region	(	resource_size_t	start,
		resource_size_t	n,
		const char *	name
	)			[static, read]

Request an IO memory region.

Parameters:

	start	start address
	n	size of memory area
	name	name of allocator (unused)

Returns:

NULL error

!=NULL success

Bug:

Since no one in Linux uses this function's return value, we do not allocate and fill a resource struct.

Definition at line 57 of file res.c.

static struct resource* l4dde26_request_region	(	resource_size_t	start,
		resource_size_t	n,
		const char *	name
	)			[static, read]

Request an IO port region.

Parameters:

	start	start port
	n	number of ports
	name	name of allocator (unused)

Returns:

NULL error

!=NULL success

Bug:

Since no one in Linux uses this function's return value, we do not allocate and fill a resource struct.

Definition at line 17 of file res.c.

static LIST_HEAD

(

dde_mem_regions

)

[static]

List of memory regions that have been requested.

This is used to perform ioremap() and iounmap()