cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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of_reserved_mem.h (2298B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef __OF_RESERVED_MEM_H
      3#define __OF_RESERVED_MEM_H
      4
      5#include <linux/device.h>
      6#include <linux/of.h>
      7
      8struct of_phandle_args;
      9struct reserved_mem_ops;
     10
     11struct reserved_mem {
     12	const char			*name;
     13	unsigned long			fdt_node;
     14	unsigned long			phandle;
     15	const struct reserved_mem_ops	*ops;
     16	phys_addr_t			base;
     17	phys_addr_t			size;
     18	void				*priv;
     19};
     20
     21struct reserved_mem_ops {
     22	int	(*device_init)(struct reserved_mem *rmem,
     23			       struct device *dev);
     24	void	(*device_release)(struct reserved_mem *rmem,
     25				  struct device *dev);
     26};
     27
     28typedef int (*reservedmem_of_init_fn)(struct reserved_mem *rmem);
     29
     30#ifdef CONFIG_OF_RESERVED_MEM
     31
     32#define RESERVEDMEM_OF_DECLARE(name, compat, init)			\
     33	_OF_DECLARE(reservedmem, name, compat, init, reservedmem_of_init_fn)
     34
     35int of_reserved_mem_device_init_by_idx(struct device *dev,
     36				       struct device_node *np, int idx);
     37int of_reserved_mem_device_init_by_name(struct device *dev,
     38					struct device_node *np,
     39					const char *name);
     40void of_reserved_mem_device_release(struct device *dev);
     41
     42struct reserved_mem *of_reserved_mem_lookup(struct device_node *np);
     43#else
     44
     45#define RESERVEDMEM_OF_DECLARE(name, compat, init)			\
     46	_OF_DECLARE_STUB(reservedmem, name, compat, init, reservedmem_of_init_fn)
     47
     48static inline int of_reserved_mem_device_init_by_idx(struct device *dev,
     49					struct device_node *np, int idx)
     50{
     51	return -ENOSYS;
     52}
     53
     54static inline int of_reserved_mem_device_init_by_name(struct device *dev,
     55						      struct device_node *np,
     56						      const char *name)
     57{
     58	return -ENOSYS;
     59}
     60
     61static inline void of_reserved_mem_device_release(struct device *pdev) { }
     62
     63static inline struct reserved_mem *of_reserved_mem_lookup(struct device_node *np)
     64{
     65	return NULL;
     66}
     67#endif
     68
     69/**
     70 * of_reserved_mem_device_init() - assign reserved memory region to given device
     71 * @dev:	Pointer to the device to configure
     72 *
     73 * This function assigns respective DMA-mapping operations based on the first
     74 * reserved memory region specified by 'memory-region' property in device tree
     75 * node of the given device.
     76 *
     77 * Returns error code or zero on success.
     78 */
     79static inline int of_reserved_mem_device_init(struct device *dev)
     80{
     81	return of_reserved_mem_device_init_by_idx(dev, dev->of_node, 0);
     82}
     83
     84#endif /* __OF_RESERVED_MEM_H */