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/*
* Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Hyra nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _VM_PMAP_H_
#define _VM_PMAP_H_
#include <sys/types.h>
#include <machine/vas.h>
/* Protection flags for mappings */
#define PROT_READ 0x00000000UL
#define PROT_WRITE BIT(0) /* Writable */
#define PROT_EXEC BIT(1) /* Executable */
#define PROT_USER BIT(2) /* User accessible */
typedef uint32_t vm_prot_t;
/*
* Fetch the current address space.
*/
struct vas pmap_read_vas(void);
/*
* Switch the virtual address space.
*/
void pmap_switch_vas(struct vas vas);
/*
* Create a new virtual address space.
*/
int pmap_new_vas(struct vas *res);
/*
* Deallocate a virtual address space.
*/
void pmap_destroy_vas(struct vas vas);
/*
* Create a virtual memory mapping of a single page.
*/
int pmap_map(struct vas vas, vaddr_t va, paddr_t pa, vm_prot_t prot);
/*
* Unmap a virtual memory mapping of a single page.
*/
int pmap_unmap(struct vas vas, vaddr_t va);
#endif /* !_VM_PMAP_H_ */
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