core/arch/arm/include/mm/core_memprot.h

/* SPDX-License-Identifier: BSD-2-Clause */
/*
 * Copyright (c) 2016, Linaro Limited
 * Copyright (c) 2014, STMicroelectronics International N.V.
 */
#ifndef CORE_MEMPROT_H
#define CORE_MEMPROT_H

#include <mm/core_mmu.h>
#include <types_ext.h>

/*
 * "pbuf_is" support.
 *
 * core_vbuf_is()/core_pbuf_is() can be used to check if a teecore mapped
 * virtual address or a physical address is "Secure", "Unsecure", "external
 * RAM" and some other fancy attributes.
 *
 * DO NOT use 'buf_is(Secure, buffer)==false' as a assumption that buffer is
 * UnSecured ! This is NOT a valid asumption ! A buffer is certified UnSecured
 * only if 'buf_is(UnSecure, buffer)==true'.
 */

/* memory atttributes */
enum buf_is_attr {
	CORE_MEM_CACHED,
	CORE_MEM_NSEC_SHM,
	CORE_MEM_NON_SEC,
	CORE_MEM_SEC,
	CORE_MEM_TEE_RAM,
	CORE_MEM_TA_RAM,
	CORE_MEM_SDP_MEM,
	CORE_MEM_REG_SHM,
};

/* redirect legacy tee_vbuf_is() and tee_pbuf_is() to our routines */
#define tee_pbuf_is     core_pbuf_is
#define tee_vbuf_is     core_vbuf_is

/* Convenience macros */
#define tee_pbuf_is_non_sec(buf, len) \
		core_pbuf_is(CORE_MEM_NON_SEC, (paddr_t)(buf), (len))

#define tee_pbuf_is_sec(buf, len) \
		core_pbuf_is(CORE_MEM_SEC, (paddr_t)(buf), (len))

#define tee_vbuf_is_non_sec(buf, len) \
		core_vbuf_is(CORE_MEM_NON_SEC, (void *)(buf), (len))

#define tee_vbuf_is_sec(buf, len) \
		core_vbuf_is(CORE_MEM_SEC, (void *)(buf), (len))

/*
 * This function return true if the buf complies with supplied flags.
 * If this function returns false buf doesn't comply with supplied flags
 * or something went wrong.
 *
 * Note that returning false doesn't guarantee that buf complies with
 * the complement of the supplied flags.
 */
bool core_pbuf_is(uint32_t flags, paddr_t pbuf, size_t len);

/*
 * Translates the supplied virtual address to a physical address and uses
 * tee_phys_buf_is() to check the compliance of the buffer.
 */
bool core_vbuf_is(uint32_t flags, const void *vbuf, size_t len);

/*
 * Translate physical address to virtual address using specified mapping
 * Returns NULL on failure or a valid virtual address on success.
 */
void *phys_to_virt(paddr_t pa, enum teecore_memtypes m);

/*
 * Translate physical address to virtual address trying MEM_AREA_IO_SEC
 * first then MEM_AREA_IO_NSEC if not found.
 * Returns NULL on failure or a valid virtual address on success.
 */
void *phys_to_virt_io(paddr_t pa);

/*
 * Translate virtual address to physical address
 * Returns 0 on failure or a valid physical address on success.
 */
paddr_t virt_to_phys(void *va);

/*
 * Return runtime usable address, irrespective of whether
 * the MMU is enabled or not.
 */
vaddr_t core_mmu_get_va(paddr_t pa, enum teecore_memtypes type);

/* Return true if @va relates to a unpaged section else false */
bool is_unpaged(void *va);

struct io_pa_va {
	paddr_t pa;
	vaddr_t va;
};

/*
 * Helper function to return a physical or virtual address for a device,
 * depending on whether the MMU is enabled or not
 * io_pa_or_va() uses secure mapped IO memory if found or fallback to
 * non-secure mapped IO memory.
 */
vaddr_t io_pa_or_va_secure(struct io_pa_va *p);
vaddr_t io_pa_or_va_nsec(struct io_pa_va *p);
vaddr_t io_pa_or_va(struct io_pa_va *p);

#endif /* CORE_MEMPROT_H */