| 0,0 → 1,124 |
|---|
| /* |
| * Copyright (c) 2003-2004 Jakub Jermar |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - 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. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. |
| */ |
| |
| /** @addtogroup arm32mm |
| * @{ |
| */ |
| /** @file |
| */ |
| |
| |
| #ifndef __MM_H__ |
| #define __MM_H__ |
| |
| #include "types.h" |
| |
| |
| #define FRAME_WIDTH 12 /* 4KB frames */ |
| #define FRAME_SIZE (1 << FRAME_WIDTH) |
| |
| #define PAGE_WIDTH FRAME_WIDTH |
| #define PAGE_SIZE FRAME_SIZE |
| |
| #ifndef __ASM__ |
| # define KA2PA(x) (((uintptr_t) (x)) - 0x80000000) |
| # define PA2KA(x) (((uintptr_t) (x)) + 0x80000000) |
| #else |
| # define KA2PA(x) ((x) - 0x80000000) |
| # define PA2KA(x) ((x) + 0x80000000) |
| #endif |
| |
| #define SET_PTL0_ADDRESS_ARCH(ptl0) ( set_ptl0_addr((pte_level0_section *)(ptl0)) ) |
| |
| |
| /// User no acess, kernel read/write |
| #define pte_ap_user_no_kernel_rw 1 |
| |
| /// Frames per 1MB section |
| #define FRAMES_PER_SECTION ( ( 1 << 20 ) / FRAME_SIZE ) |
| |
| /// Converts Address to frame |
| #define ADDR2PFN( addr ) ( ((uintptr_t)(addr))>>FRAME_WIDTH ) |
| /** Value of descriptor_type in page table entry that signals |
| * that this entry describe section |
| */ |
| #define pte_descriptor_section 2 |
| |
| /** Page Table Entry. */ |
| typedef struct { |
| /**PageTables are so different that we have different types |
| * for level 0 and level1 page table entries |
| */ |
| unsigned dummy : 32; |
| } pte_t; |
| |
| /** Page table level 0 entry - section format */ |
| typedef struct { |
| unsigned descriptor_type : 2; // should be 2 |
| unsigned bufferable : 1; |
| unsigned cacheable : 1; |
| unsigned machine_depend : 1; // Alf: ???? v Architecture previev neni vyznam definovan |
| unsigned domain : 4; |
| unsigned should_be_zero_1 : 1; |
| unsigned access_permission : 2; |
| unsigned should_be_zero_2 : 8; |
| unsigned section_base_addr : 12; |
| } __attribute__ ((packed)) pte_level0_section; |
| |
| |
| /** Set adress of paging level 0 table |
| * \param pt pointer to page table to set |
| */ |
| static inline void set_ptl0_addr( pte_level0_section* pt) { |
| asm volatile ( "mcr p15, 0, %0, c2, c0, 0 \n" |
| : |
| : "r"(pt) |
| ); |
| |
| } |
| |
| /// Page table that holds 1:1 mapping for kernel starting |
| extern pte_level0_section page_table[4096]; |
| |
| |
| /** Set page table entry to point no frame, be read/write by kernel, |
| * no access by user, become to domain 0, no cache or buffer |
| * \param pte page table entry to set |
| * \param frame frame number of first frame 1MB section |
| * Note: If frame not aligned it's used first lower 1MB aligned frame |
| */ |
| void init_pte_level0_section_entry( pte_level0_section* pte, unsigned frame); |
| |
| /// Sets memory mapping for kernel |
| void mm_kernel_mapping(void); |
| |
| #endif |
| |
| /** @} |
| */ |
| |