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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef TRUSTY_SYSDEPS_H_
#define TRUSTY_SYSDEPS_H_
/*
* Change these includes to match your platform to bring in the equivalent
* types available in a normal C runtime. At least things like uint64_t,
* uintptr_t, and bool (with |false|, |true| keywords) must be present.
*/
#include <compiler.h>
#include <stdarg.h>
#include <stdbool.h>
#include <linux/types.h>
/*
* These attribute macros may need to be adjusted if not using gcc or clang.
*/
#define TRUSTY_ATTR_PACKED __attribute__((packed))
#define TRUSTY_ATTR_NO_RETURN __attribute__((noreturn))
#define TRUSTY_ATTR_SENTINEL __attribute__((__sentinel__))
#define TRUSTY_ATTR_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
#define PAGE_SIZE 4096
/*
* Struct containing attributes for memory to be shared with secure size.
*/
struct ns_mem_page_info {
uint64_t attr;
};
struct trusty_dev;
/*
* Lock/unlock mutex associated with @dev. These can be safely empty in a single
* threaded environment.
*
* @dev: Trusty device initialized with trusty_dev_init
*/
void trusty_lock(struct trusty_dev *dev);
void trusty_unlock(struct trusty_dev *dev);
/*
* Disable/enable IRQ interrupts and save/restore @state
*/
void trusty_local_irq_disable(unsigned long *state);
void trusty_local_irq_restore(unsigned long *state);
/*
* Put in standby state waiting for interrupt.
*
* @dev: Trusty device initialized with trusty_dev_init
*/
void trusty_idle(struct trusty_dev *dev);
/*
* Aborts the program or reboots the device.
*/
void trusty_abort(void) TRUSTY_ATTR_NO_RETURN;
/*
* Print a formatted string. @format must point to a NULL-terminated string, and
* is followed by arguments to be printed.
*/
void trusty_printf(const char *format, ...);
/*
* Copy @n bytes from @src to @dest.
*/
void *trusty_memcpy(void *dest, const void *src, size_t n);
/*
* Set @n bytes starting at @dest to @c. Returns @dest.
*/
void *trusty_memset(void *dest, const int c, size_t n);
/*
* Copy string from @src to @dest, including the terminating NULL byte.
*
* The size of the array at @dest should be long enough to contain the string
* at @src, and should not overlap in memory with @src.
*/
char *trusty_strcpy(char *dest, const char *src);
/*
* Returns the length of @str, excluding the terminating NULL byte.
*/
size_t trusty_strlen(const char *str);
/*
* Allocate @n elements of size @size. Initializes memory to 0, returns pointer
* to it.
*/
void *trusty_calloc(size_t n, size_t size) TRUSTY_ATTR_WARN_UNUSED_RESULT;
/*
* Free memory at @addr allocated with trusty_calloc.
*/
void trusty_free(void *addr);
/*
* Allocate @count contiguous pages to be shared with secure side.
*
* @mem_inf: Stores cache attributes
* Returns: vaddr of allocated memory
*/
void *trusty_alloc_pages(struct ns_mem_page_info *mem_inf,
unsigned count) TRUSTY_ATTR_WARN_UNUSED_RESULT;
/*
* Free @count pages at @vaddr allocated by trusty_alloc_pages
*/
void trusty_free_pages(void *vaddr, unsigned count);
#endif /* TRUSTY_SYSDEPS_H_ */
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