| /branches/arm/boot/arch/arm32/loader/mm.h |
|---|
| 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 |
| /** @} |
| */ |
| /branches/arm/boot/arch/arm32/loader/boot.S |
|---|
| 39,3 → 39,9 |
| bx r0 |
| .section PT |
| # align for start of page |
| .global page_table |
| page_table: |
| .skip 4096*4 |
| # make place for first level page table |
| /branches/arm/boot/arch/arm32/loader/main.c |
|---|
| 31,6 → 31,7 |
| #include "_components.h" |
| #include <printf.h> |
| #include "mm.h" |
| #define KERNEL_PHY_ADDRESS 0x00100000 |
| 73,6 → 74,8 |
| components[i].start, components[i].name, components[i].size); |
| } |
| printf("\nAddr of page table : %L\n", page_table); |
| printf("\nCopying components\n"); |
| unsigned int top = 0; |
| bootinfo.cnt = 0; |
| 101,8 → 104,10 |
| top += components[i].size; |
| printf("done.\n"); |
| } |
| mm_kernel_mapping(); |
| printf("\nBooting the kernel...\n"); |
| jump_to_kernel((void *) KERNEL_PHY_ADDRESS, &bootinfo, sizeof(bootinfo)); |
| jump_to_kernel((void *) PA2KA(KERNEL_PHY_ADDRESS), &bootinfo, sizeof(bootinfo)); |
| } |
| /branches/arm/boot/arch/arm32/loader/asm.h |
|---|
| 29,8 → 29,6 |
| #ifndef __ASM_H__ |
| #define __ASM_H__ |
| #define PAGE_SIZE 16384 |
| #define memcpy(dst, src, cnt) __builtin_memcpy((dst), (src), (cnt)) |
| /*void memcpy(void *dst, void *src, int cnt);*/ |
| /branches/arm/boot/arch/arm32/loader/mm.c |
|---|
| 0,0 → 1,81 |
| /* |
| * 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 |
| */ |
| #include "mm.h" |
| void init_pte_level0_section_entry( pte_level0_section* pte, unsigned frame){ |
| pte->descriptor_type = pte_descriptor_section; |
| pte->bufferable = 0; // disable |
| pte->cacheable = 0; |
| pte->machine_depend = 0; |
| pte->domain = 0; |
| pte->should_be_zero_1 = 0; |
| pte->access_permission = pte_ap_user_no_kernel_rw; |
| pte->should_be_zero_2 = 0; |
| pte->section_base_addr = (frame << FRAME_WIDTH) >> 20; |
| }; |
| // set memory mapping for kernel |
| void mm_kernel_mapping(void) { |
| int i; |
| // Create 1:1 mapping |
| for( i=0; i < 4096; i++) |
| init_pte_level0_section_entry(&page_table[i+0000], i * FRAMES_PER_SECTION); |
| // Create Kernel mapping |
| const unsigned int offset = ADDR2PFN(PA2KA(0)) / FRAMES_PER_SECTION; |
| for( i = offset; i < 4096; i++) |
| init_pte_level0_section_entry(&page_table[i], (i - offset) * FRAMES_PER_SECTION); |
| SET_PTL0_ADDRESS_ARCH( page_table); |
| // enable paging |
| asm volatile ( |
| "ldr r0, =0x55555555 \n" |
| "mcr p15, 0, r0, c3, c0, 0 \n" //set domain acces rights to client <==> take rights from page tables |
| "mrc p15, 0, r0, c1, c0, 0 \n" // get current setting of system ... register 1 isn't only for memmory management |
| "ldr r1, =0xFFFFFE8D \n" // mask to disable aligment checks, System, Rom bit disable |
| "and r0, r0, r1 \n" |
| "ldr r1, =0x00000001 \n" // mask to enable paging |
| "orr r0, r0, r1 \n" |
| "mcr p15, 0, r0, c1, c0, 0 \n" // store setting |
| : |
| : |
| : "r0", "r1" |
| ); |
| }; |
| /** @} |
| */ |
| /branches/arm/boot/arch/arm32/loader/Makefile |
|---|
| 64,6 → 64,7 |
| boot.S \ |
| asm.S \ |
| io.c \ |
| mm.c \ |
| ../../../generic/printf.c \ |
| ../../../genarch/division.c |
| /branches/arm/boot/arch/arm32/loader/pack |
|---|
| 53,8 → 53,11 |
| *(.scommon); |
| *(.bss); /* uninitialized static variables */ |
| *(COMMON); /* global variables */ |
| *(.reginfo);" > "$LINK" |
| *(.reginfo); |
| . = ALIGN(16384); |
| *(PT); /* page table */" > "$LINK" |
| echo '#ifndef ___COMPONENTS_H__ |
| #define ___COMPONENTS_H__ |