/branches/arm/kernel/arch/arm32/Makefile.inc |
---|
36,7 → 36,7 |
TARGET = arm-linux-gnu |
TOOLCHAIN_DIR = /usr/local/arm |
KERNEL_LOAD_ADDRESS = 0x00100000 |
KERNEL_LOAD_ADDRESS = 0x80100000 |
CFLAGS += -fno-zero-initialized-in-bss |
/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__ |