ofw_io.h 文件参考

#include <ioremap.h>
#include <drivers/ofw.h>

ofw_io.h 的引用(Include)关系图:

浏览该文件的源代码.

函数
int	rt_ofw_bus_addr_cells (struct rt_ofw_node *np)
int	rt_ofw_bus_size_cells (struct rt_ofw_node *np)
int	rt_ofw_io_addr_cells (struct rt_ofw_node *np)
int	rt_ofw_io_size_cells (struct rt_ofw_node *np)
int	rt_ofw_get_address_count (struct rt_ofw_node *np)
rt_err_t	rt_ofw_get_address (struct rt_ofw_node *np, int index, rt_uint64_t *out_address, rt_uint64_t *out_size)
rt_err_t	rt_ofw_get_address_by_name (struct rt_ofw_node *np, const char *name, rt_uint64_t *out_address, rt_uint64_t *out_size)
int	rt_ofw_get_address_array (struct rt_ofw_node *np, int nr, rt_uint64_t *out_regs)
rt_uint64_t	rt_ofw_translate_address (struct rt_ofw_node *np, const char *range_type, rt_uint64_t address)
rt_uint64_t	rt_ofw_reverse_address (struct rt_ofw_node *np, const char *range_type, rt_uint64_t address)
rt_inline rt_uint64_t	rt_ofw_translate_dma2cpu (struct rt_ofw_node *np, rt_uint64_t address)
rt_inline rt_uint64_t	rt_ofw_translate_cpu2dma (struct rt_ofw_node *np, rt_uint64_t address)
void *	rt_ofw_iomap (struct rt_ofw_node *np, int index)
void *	rt_ofw_iomap_by_name (struct rt_ofw_node *np, const char *name)

函数说明

rt_ofw_bus_addr_cells()

int rt_ofw_bus_addr_cells

(

struct rt_ofw_node *

np

)

rt_ofw_bus_size_cells()

int rt_ofw_bus_size_cells

(

struct rt_ofw_node *

np

)

rt_ofw_io_addr_cells()

int rt_ofw_io_addr_cells

(

struct rt_ofw_node *

np

)

rt_ofw_io_size_cells()

int rt_ofw_io_size_cells

(

struct rt_ofw_node *

np

)

rt_ofw_get_address_count()

int rt_ofw_get_address_count

(

struct rt_ofw_node *

np

)

rt_ofw_get_address()

rt_err_t rt_ofw_get_address	(	struct rt_ofw_node *	np,
		int	index,
		rt_uint64_t *	out_address,
		rt_uint64_t *	out_size )

rt_ofw_get_address_by_name()

rt_err_t rt_ofw_get_address_by_name	(	struct rt_ofw_node *	np,
		const char *	name,
		rt_uint64_t *	out_address,
		rt_uint64_t *	out_size )

rt_ofw_get_address_array()

int rt_ofw_get_address_array	(	struct rt_ofw_node *	np,
		int	nr,
		rt_uint64_t *	out_regs )

rt_ofw_translate_address()

rt_uint64_t rt_ofw_translate_address	(	struct rt_ofw_node *	np,
		const char *	range_type,
		rt_uint64_t	address )

这是这个函数的调用关系图:

rt_ofw_reverse_address()

rt_uint64_t rt_ofw_reverse_address	(	struct rt_ofw_node *	np,
		const char *	range_type,
		rt_uint64_t	address )

这是这个函数的调用关系图:

rt_ofw_translate_dma2cpu()

rt_inline rt_uint64_t rt_ofw_translate_dma2cpu	(	struct rt_ofw_node *	np,
		rt_uint64_t	address )

在文件 ofw_io.h 第 31 行定义.

{
    rt_uint64_t bus_addr, cpu_addr;
 
    bus_addr = rt_ofw_reverse_address(np, "dma-ranges", address);
    cpu_addr = rt_ofw_translate_address(np, "ranges", bus_addr);
 
    return cpu_addr != ~0ULL ? cpu_addr : address;
}

引用了 rt_ofw_reverse_address() , 以及 rt_ofw_translate_address().

函数调用图:

rt_ofw_translate_cpu2dma()

rt_inline rt_uint64_t rt_ofw_translate_cpu2dma	(	struct rt_ofw_node *	np,
		rt_uint64_t	address )

在文件 ofw_io.h 第 41 行定义.

{
    rt_uint64_t bus_addr, dma_addr;
 
    bus_addr = rt_ofw_reverse_address(np, "ranges", address);
    dma_addr = rt_ofw_translate_address(np, "dma-ranges", bus_addr);
 
    return dma_addr != ~0ULL ? dma_addr : address;
}

引用了 rt_ofw_reverse_address() , 以及 rt_ofw_translate_address().

函数调用图:

rt_ofw_iomap()

void * rt_ofw_iomap	(	struct rt_ofw_node *	np,
		int	index )

rt_ofw_iomap_by_name()

void * rt_ofw_iomap_by_name	(	struct rt_ofw_node *	np,
		const char *	name )