drivers/misc/sram.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Defines for the SRAM driver
   4  */
   5 #ifndef __SRAM_H
   6 #define __SRAM_H
   7
   8 struct sram_config {
   9         int (*init)(void);
  10         bool map_only_reserved;
  11 };
  12
  13 struct sram_partition {
  14         void __iomem *base;
  15
  16         struct gen_pool *pool;
  17         struct bin_attribute battr;
  18         struct mutex lock;
  19         struct list_head list;
  20 };
  21
  22 struct sram_dev {
  23         const struct sram_config *config;
  24
  25         struct device *dev;
  26         void __iomem *virt_base;
  27         bool no_memory_wc;
  28
  29         struct gen_pool *pool;
  30         struct clk *clk;
  31
  32         struct sram_partition *partition;
  33         u32 partitions;
  34 };
  35
  36 struct sram_reserve {
  37         struct list_head list;
  38         u32 start;
  39         u32 size;
  40         struct resource res;
  41         bool export;
  42         bool pool;
  43         bool protect_exec;
  44         const char *label;
  45 };
  46
  47 #ifdef CONFIG_SRAM_EXEC
  48 int sram_check_protect_exec(struct sram_dev *sram, struct sram_reserve *block,
  49                             struct sram_partition *part);
  50 int sram_add_protect_exec(struct sram_partition *part);
  51 #else
  52 static inline int sram_check_protect_exec(struct sram_dev *sram,
  53                                           struct sram_reserve *block,
  54                                           struct sram_partition *part)
  55 {
  56         return -ENODEV;
  57 }
  58
  59 static inline int sram_add_protect_exec(struct sram_partition *part)
  60 {
  61         return -ENODEV;
  62 }
  63 #endif /* CONFIG_SRAM_EXEC */
  64 #endif /* __SRAM_H */