Index: boot/arch/arm32/loader/Makefile =================================================================== --- boot/arch/arm32/loader/Makefile (revision 6b781c0c856d94b3114ccd6375bc6667a19e9bfe) +++ boot/arch/arm32/loader/Makefile (revision 6b781c0c856d94b3114ccd6375bc6667a19e9bfe) @@ -0,0 +1,115 @@ +# +# Copyright (c) 2006 Martin Decky +# 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. +# + +include ../../../../version +include ../../../../Makefile.config + +## Toolchain configuration +# + +TARGET = arm-linux-gnu +TOOLCHAIN_DIR = /usr/local/arm/bin + +ifeq ($(COMPILER),native) + CC = gcc + AS = as + LD = ld + OBJCOPY = objcopy + OBJDUMP = objdump +else + CC = $(TOOLCHAIN_DIR)/$(TARGET)-gcc + AS = $(TOOLCHAIN_DIR)/$(TARGET)-as + LD = $(TOOLCHAIN_DIR)/$(TARGET)-ld + OBJCOPY = $(TOOLCHAIN_DIR)/$(TARGET)-objcopy + OBJDUMP = $(TOOLCHAIN_DIR)/$(TARGET)-objdump +endif + +CFLAGS = -DRELEASE=\"$(RELEASE)\" -I. -I../../../generic -I../../.. -nostdinc -nostdlib -fno-builtin -Werror-implicit-function-declaration -Wmissing-prototypes -Werror -O3 + +ifdef REVISION + CFLAGS += "-DREVISION=\"$(REVISION)\"" +endif + +ifdef TIMESTAMP + CFLAGS += "-DTIMESTAMP=\"$(TIMESTAMP)\"" +endif + +ifdef MACHINE + CFLAGS += "-DMACHINE=$(MACHINE)" +endif + +SOURCES = \ + main.c \ + boot.S \ + asm.S \ + mm.c \ + ../../../generic/printf.c \ + ../../../genarch/division.c + +ifeq ($(MACHINE), gxemul_testarm) + SOURCES += print/gxemul.c +endif + + +COMPONENTS = \ + $(KERNELDIR)/kernel.bin \ + $(USPACEDIR)/ns/ns \ + $(USPACEDIR)/init/init \ + $(USPACEDIR)/kbd/kbd \ + $(USPACEDIR)/console/console \ + $(USPACEDIR)/fb/fb \ + $(USPACEDIR)/tester/tester \ + $(USPACEDIR)/klog/klog \ + $(USPACEDIR)/tetris/tetris + +OBJECTS := $(addsuffix .o,$(basename $(SOURCES))) +COMPONENT_OBJECTS := $(addsuffix .o,$(basename $(notdir $(COMPONENTS)))) + +.PHONY: all clean depend + +all: image.boot + +-include Makefile.depend + +image.boot: depend _components.h _link.ld $(OBJECTS) $(COMPONENT_OBJECTS) + $(LD) -no-check-sections -N -T _link.ld $(COMPONENT_OBJECTS) $(OBJECTS) -o $@ + +depend: + -makedepend $(DEFS) $(CFLAGS) -f - $(SOURCES) > Makefile.depend 2> /dev/null + +clean: + -rm -f _components.h _link.ld $(COMPONENT_OBJECTS) $(OBJECTS) image.boot Makefile.depend + +_components.h _link.ld $(COMPONENT_OBJECTS): $(COMPONENTS) + ./pack $(IMAGE) $(OBJCOPY) $(COMPONENTS) + +%.o: %.S + $(CC) $(DEFS) $(CFLAGS) -D__ASM__ -c $< -o $@ + +%.o: %.c + $(CC) $(DEFS) $(CFLAGS) -c $< -o $@ Index: boot/arch/arm32/loader/asm.S =================================================================== --- boot/arch/arm32/loader/asm.S (revision 6b781c0c856d94b3114ccd6375bc6667a19e9bfe) +++ boot/arch/arm32/loader/asm.S (revision 6b781c0c856d94b3114ccd6375bc6667a19e9bfe) @@ -0,0 +1,85 @@ +# +# Copyright (c) 2007 Michal Kebrt +# 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. +# + + +.text + +.global memcpy + +memcpy: + add r3, r1, #3 + bic r3, r3, #3 + cmp r1, r3 + stmdb sp!, {r4, lr} + beq 4f +1: + cmp r2, #0 + movne ip, #0 + beq 3f +2: + ldrb r3, [ip, r1] + strb r3, [ip, r0] + add ip, ip, #1 + cmp ip, r2 + bne 2b +3: + mov r0, r1 + ldmia sp!, {r4, pc} +4: + add r3, r0, #3 + bic r3, r3, #3 + cmp r0, r3 + bne 1b + movs r4, r2, lsr #2 + moveq lr, r4 + beq 6f + mov lr, #0 + mov ip, lr +5: + ldr r3, [ip, r1] + add lr, lr, #1 + cmp lr, r4 + str r3, [ip, r0] + add ip, ip, #4 + bne 5b +6: + ands r4, r2, #3 + beq 3b + mov r3, lr, lsl #2 + add r0, r3, r0 + add ip, r3, r1 + mov r2, #0 +7: + ldrb r3, [r2, ip] + strb r3, [r2, r0] + add r2, r2, #1 + cmp r2, r4 + bne 7b + b 3b + + Index: boot/arch/arm32/loader/asm.h =================================================================== --- boot/arch/arm32/loader/asm.h (revision 6b781c0c856d94b3114ccd6375bc6667a19e9bfe) +++ boot/arch/arm32/loader/asm.h (revision 6b781c0c856d94b3114ccd6375bc6667a19e9bfe) @@ -0,0 +1,73 @@ +/* + * Copyright (c) 2007 Michal Kebrt + * 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 arm32boot + * @{ + */ +/** @file + * @brief Functions implemented in assembly. + */ + + +#ifndef BOOT_arm32_ASM_H +#define BOOT_arm32_ASM_H + + +/** Copies cnt bytes from dst to src. + * + * @param dst Destination address. + * @param src Source address. + * @param cnt Count of bytes to be copied. + */ +#define memcpy(dst, src, cnt) __builtin_memcpy((dst), (src), (cnt)) + + +/** Called when the CPU is switched on. + * + * This function is placed to the 0x0 address where ARM CPU starts execution. + * Jumps to the #bootstrap only. + */ +extern void start(void); + + +/** Jumps to the kernel entry point. + * + * @param entry Kernel entry point address. + * @param bootinfo Structure holding information about loaded tasks. + * @param bootinfo_size Size of the bootinfo structure. + */ +extern void jump_to_kernel(void *entry, void *bootinfo, unsigned int bootinfo_size) __attribute__((noreturn)); + + +#endif + + +/** @} + */ + Index: boot/arch/arm32/loader/boot.S =================================================================== --- boot/arch/arm32/loader/boot.S (revision 6b781c0c856d94b3114ccd6375bc6667a19e9bfe) +++ boot/arch/arm32/loader/boot.S (revision 6b781c0c856d94b3114ccd6375bc6667a19e9bfe) @@ -0,0 +1,52 @@ +# +# Copyright (c) 2007 Michal Kebrt +# 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. +# + + +#include "mm.h" + +.section BOOTSTRAP + +.global start +.global jump_to_kernel +.global page_table + +start: + b bootstrap + +jump_to_kernel: + bx r0 + + +# place page_table to PT section +.section PT + +# make place for PTL0 page table +page_table: + .skip PTL0_ENTRIES * PTL0_ENTRY_SIZE + + Index: boot/arch/arm32/loader/main.c =================================================================== --- boot/arch/arm32/loader/main.c (revision 6b781c0c856d94b3114ccd6375bc6667a19e9bfe) +++ boot/arch/arm32/loader/main.c (revision 6b781c0c856d94b3114ccd6375bc6667a19e9bfe) @@ -0,0 +1,115 @@ +/* + * Copyright (c) 2007 Michal Kebrt + * 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 arm32boot + * @{ + */ +/** @file + * @brief Bootstrap. + */ + + +#include "main.h" +#include "asm.h" +#include "_components.h" +#include + +#include "mm.h" + +/** Kernel entry point address. */ +#define KERNEL_VIRTUAL_ADDRESS 0x80200000 + + +char *release = RELEASE; + +#ifdef REVISION + char *revision = ", revision " REVISION; +#else + char *revision = ""; +#endif + +#ifdef TIMESTAMP + char *timestamp = "\nBuilt on " TIMESTAMP; +#else + char *timestamp = ""; +#endif + + +/** Prints bootloader version information. */ +static void version_print(void) +{ + printf("HelenOS ARM32 Bootloader\nRelease %s%s%s\nCopyright (c) 2007 HelenOS project\n", + release, revision, timestamp); +} + + +/** Copies all images (kernel + user tasks) to #KERNEL_VIRTUAL_ADDRESS and jumps there. */ +void bootstrap(void) +{ + mmu_start(); + version_print(); + + component_t components[COMPONENTS]; + bootinfo_t bootinfo; + init_components(components); + + printf("\nMemory statistics\n"); + printf(" kernel entry point at %L\n", KERNEL_VIRTUAL_ADDRESS); + printf(" %L: boot info structure\n", &bootinfo); + + unsigned int i, j; + for (i = 0; i < COMPONENTS; i++) { + printf(" %L: %s image (size %d bytes)\n", + components[i].start, components[i].name, components[i].size); + } + + printf("\nCopying components\n"); + + unsigned int top = 0; + bootinfo.cnt = 0; + for (i = 0; i < COMPONENTS; i++) { + printf(" %s...", components[i].name); + top = ALIGN_UP(top, KERNEL_PAGE_SIZE); + memcpy(((void *) KERNEL_VIRTUAL_ADDRESS) + top, components[i].start, components[i].size); + if (i > 0) { + bootinfo.tasks[bootinfo.cnt].addr = ((void *) KERNEL_VIRTUAL_ADDRESS) + top; + bootinfo.tasks[bootinfo.cnt].size = components[i].size; + bootinfo.cnt++; + } + top += components[i].size; + printf("done.\n"); + } + + printf("\nBooting the kernel...\n"); + jump_to_kernel((void *) KERNEL_VIRTUAL_ADDRESS, &bootinfo, sizeof(bootinfo)); +} + +/** @} + */ + Index: boot/arch/arm32/loader/main.h =================================================================== --- boot/arch/arm32/loader/main.h (revision 6b781c0c856d94b3114ccd6375bc6667a19e9bfe) +++ boot/arch/arm32/loader/main.h (revision 6b781c0c856d94b3114ccd6375bc6667a19e9bfe) @@ -0,0 +1,78 @@ +/* + * Copyright (c) 2007 Michal Kebrt + * 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 arm32boot + * @{ + */ +/** @file + * @brief Boot related declarations. + */ + + +#ifndef BOOT_arm32_MAIN_H +#define BOOT_arm32_MAIN_H + + +/** Aligns to the nearest higher address. + * + * @param addr Address or number to be aligned. + * @param align Size of alignment, must be power of 2. + */ +#define ALIGN_UP(addr, align) (((addr) + ((align) - 1)) & ~((align) - 1)) + +/** Maximum number of tasks in the #bootinfo_t struct. */ +#define TASKMAP_MAX_RECORDS 32 + + +/** Struct holding information about single loaded task. */ +typedef struct { + /** Address where the task was placed. */ + void *addr; + /** Size of the task's binary. */ + unsigned int size; +} task_t; + + +/** Struct holding information about loaded tasks. */ +typedef struct { + /** Number of loaded tasks. */ + unsigned int cnt; + /** Array of loaded tasks. */ + task_t tasks[TASKMAP_MAX_RECORDS]; +} bootinfo_t; + + + +extern void bootstrap(void); + +#endif + +/** @} + */ + Index: boot/arch/arm32/loader/mm.c =================================================================== --- boot/arch/arm32/loader/mm.c (revision 6b781c0c856d94b3114ccd6375bc6667a19e9bfe) +++ boot/arch/arm32/loader/mm.c (revision 6b781c0c856d94b3114ccd6375bc6667a19e9bfe) @@ -0,0 +1,94 @@ +/* + * Copyright (c) 2007 Pavel Jancik, Michal Kebrt + * 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 arm32boot + * @{ + */ +/** @file + * @brief Memory management used while booting the kernel. + */ + + +#include "mm.h" + + +/** Initializes "section" page table entry. + * + * Will be readable/writable by kernel with no access from user mode. + * Will belong to domain 0. No cache or buffering is enabled. + * + * @param pte Section entry to initialize. + * @param frame First frame in the section (frame number). + * + * @note If frame is not 1MB aligned, first lower 1MB aligned frame will be used. + */ +static void init_pte_level0_section(pte_level0_section_t* pte, unsigned int frame) +{ + pte->descriptor_type = PTE_DESCRIPTOR_SECTION; + pte->bufferable = 0; + pte->cacheable = 0; + pte->impl_specific = 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; +} + + +/** Initializes page table used while booting the kernel. */ +static void init_page_table(void) +{ + int i; + const unsigned int first_kernel_page = ADDR2PFN(PA2KA(0)); + + // create 1:1 virtual-physical mapping (in lower 2GB) + for (i = 0; i < first_kernel_page; i++) { + init_pte_level0_section(&page_table[i], i); + } + + // create 1:1 virtual-physical mapping in kernel space (upper 2GB), + // physical addresses start from 0 + for (i = first_kernel_page; i < PTL0_ENTRIES; i++) { + init_pte_level0_section(&page_table[i], i - first_kernel_page); + } +} + + +/** Starts the MMU - initializes page table and enables paging. */ +void mmu_start() { + init_page_table(); + set_ptl0_address(page_table); + enable_paging(); +} + + +/** @} + */ + Index: boot/arch/arm32/loader/mm.h =================================================================== --- boot/arch/arm32/loader/mm.h (revision 6b781c0c856d94b3114ccd6375bc6667a19e9bfe) +++ boot/arch/arm32/loader/mm.h (revision 6b781c0c856d94b3114ccd6375bc6667a19e9bfe) @@ -0,0 +1,160 @@ +/* + * Copyright (c) 2007 Pavel Jancik, Michal Kebrt + * 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 arm32boot + * @{ + */ +/** @file + * @brief Memory management used while booting the kernel. + * + * So called "section" paging is used while booting the kernel. The term "section" + * comes from the ARM architecture specification and stands for the following: + * one-level paging, 1MB sized pages, 4096 entries in the page table. + */ + + +#ifndef BOOT_arm32__MM_H +#define BOOT_arm32__MM_H + + +#ifndef __ASM__ +#include "types.h" +#endif + + +/** Frame width. */ +#define FRAME_WIDTH 20 + +/** Frame size. */ +#define FRAME_SIZE (1 << FRAME_WIDTH) + +/** Page size in 2-level paging which is switched on later after the kernel initialization. */ +#define KERNEL_PAGE_SIZE (1 << 12) + + +#ifndef __ASM__ +/** Converts kernel address to physical address. */ +# define KA2PA(x) (((uintptr_t) (x)) - 0x80000000) +/** Converts physical address to kernel address. */ +# define PA2KA(x) (((uintptr_t) (x)) + 0x80000000) +#else +# define KA2PA(x) ((x) - 0x80000000) +# define PA2KA(x) ((x) + 0x80000000) +#endif + + +/** Number of entries in PTL0. */ +#define PTL0_ENTRIES (1<<12) /* 4096 */ + +/** Size of an entry in PTL0. */ +#define PTL0_ENTRY_SIZE 4 + +/** Returns number of frame the address belongs to. */ +#define ADDR2PFN( addr ) ( ((uintptr_t)(addr)) >> FRAME_WIDTH ) + +/** Describes "section" page table entry (one-level paging with 1MB sized pages). */ +#define PTE_DESCRIPTOR_SECTION 0x2 + +/** Page table access rights: user - no access, kernel - read/write. */ +#define PTE_AP_USER_NO_KERNEL_RW 0x1 + + +#ifndef __ASM__ + + +/** Page table level 0 entry - "section" format is used (one-level paging, 1MB sized + * pages). Used only while booting the kernel. + */ +typedef struct { + unsigned descriptor_type : 2; + unsigned bufferable : 1; + unsigned cacheable : 1; + unsigned impl_specific : 1; + 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_t; + + +/** Page table that holds 1:1 virtual to physical mapping used while booting the kernel. */ +extern pte_level0_section_t page_table[PTL0_ENTRIES]; + +extern void mmu_start(void); + + +/** Enables paging. */ +static inline void enable_paging() +{ + /* c3 - each two bits controls access to the one of domains (16) + * 0b01 - behave as a client (user) of a domain + */ + asm volatile ( + // behave as a client of domains + "ldr r0, =0x55555555 \n" + "mcr p15, 0, r0, c3, c0, 0 \n" + + // current settings + "mrc p15, 0, r0, c1, c0, 0 \n" + + // mask to enable paging + "ldr r1, =0x00000001 \n" + "orr r0, r0, r1 \n" + + // store settings + "mcr p15, 0, r0, c1, c0, 0 \n" + : + : + : "r0", "r1" + ); +} + + +/** Sets the address of level 0 page table to CP15 register 2. + * + * @param pt Address of a page table to set. + */ +static inline void set_ptl0_address(pte_level0_section_t* pt) +{ + asm volatile ( + "mcr p15, 0, %0, c2, c0, 0 \n" + : + : "r"(pt) + ); +} + + +#endif + +#endif + +/** @} + */ + Index: boot/arch/arm32/loader/pack =================================================================== --- boot/arch/arm32/loader/pack (revision 6b781c0c856d94b3114ccd6375bc6667a19e9bfe) +++ boot/arch/arm32/loader/pack (revision 6b781c0c856d94b3114ccd6375bc6667a19e9bfe) @@ -0,0 +1,139 @@ +#! /bin/sh + +# +# Copyright (C) 2007 Michal Kebrt +# 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. +# + + +OBJCOPY="$1" +LINK="_link.ld" +HEADER="_components.h" + +shift 1 + +echo "OUTPUT_FORMAT(\"elf32-littlearm\") + +ENTRY(start) + +SECTIONS { + .boot 0x0: AT (0) { + *(BOOTSTRAP); + *(.text); + + *(.rodata); + *(.rodata.*); + *(.data); /* initialized data */ + *(.sdata); + *(.sdata2); + *(.sbss); + *(.scommon); + *(.bss); /* uninitialized static variables */ + *(COMMON); /* global variables */ + *(.reginfo); + + . = 0x4000; + *(PT); /* page table placed at 0x4000 */" > "$LINK" + +echo ' +/** @addtogroup arm32boot + * @{ + */ +/** @file + * @brief Components (kernel + tasks) related declarations. + * + * Generated by the pack script. This script packs all the + * components (kernel + tasks) into one image (image.boot) and generates + * a code that initializes an array of #component_t structs. + */ + +#ifndef ___COMPONENTS_H__ +#define ___COMPONENTS_H__ + +/** Holds information about components packed to one image (kernel + tasks). */ +typedef struct { + /** Name. */ + char *name; + /** Start address. */ + void *start; + /** End address. */ + void *end; + /** Size (in bytes). */ + unsigned int size; +} component_t; + +/** @} +*/ + +' > "$HEADER" + +COUNT="0" +DATA="" + +for TASK in "$@" ; do + BASENAME="`basename "$TASK" | sed 's/^\(.*\)\.[^.]*$/\1/'`" + OBJECT="${BASENAME}.o" + SYMBOL="`echo "_binary_$TASK" | tr "./" "__"`" + MACRO="`echo "$BASENAME" | tr [:lower:] [:upper:]`" + echo "$TASK -> $OBJECT" + + echo " + . = ALIGN(4096); + *(.${BASENAME}_image);" >> "$LINK" + + echo " +extern int ${SYMBOL}_start; +extern int ${SYMBOL}_end; + +#define ${MACRO}_START ((void *) &${SYMBOL}_start) +#define ${MACRO}_END ((void *) &${SYMBOL}_end) +#define ${MACRO}_SIZE ((unsigned int) ${MACRO}_END - (unsigned int) ${MACRO}_START)" >> "$HEADER" + + "$OBJCOPY" -I binary -O elf32-littlearm -B arm --rename-section ".data=.${BASENAME}_image" "$TASK" "$OBJECT" + + DATA="${DATA} + components[$COUNT].name = \"${BASENAME}\"; + components[$COUNT].start = ${MACRO}_START; + components[$COUNT].end = ${MACRO}_END; + components[$COUNT].size = ${MACRO}_SIZE;"; + COUNT="`expr "$COUNT" + 1`" +done + +echo ' } +}' >> "$LINK" + +echo " +#define COMPONENTS $COUNT + +/** Initializes array of components. */ +static void init_components(component_t components[]) +{ +$DATA +} + +#endif + +" >> "$HEADER" Index: boot/arch/arm32/loader/print/gxemul.c =================================================================== --- boot/arch/arm32/loader/print/gxemul.c (revision 6b781c0c856d94b3114ccd6375bc6667a19e9bfe) +++ boot/arch/arm32/loader/print/gxemul.c (revision 6b781c0c856d94b3114ccd6375bc6667a19e9bfe) @@ -0,0 +1,70 @@ +/* + * Copyright (c) 2007 Michal Kebrt + * 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 arm32boot + * @{ + */ +/** @file + * @brief GXemul specific code. + */ + + +#include + + +/** Address where characters to be printed are expected. */ +#define PUTC_ADDRESS 0x10000000 + + +/** Prints a character to the console. + * + * @param ch Character to be printed. + */ +static void putc(char ch) +{ + *((volatile char *)PUTC_ADDRESS) = ch; +} + + +/** Prints a string to the console. + * + * @param str String to be printed. + * @param len Number of characters to be printed. + */ +void write(const char *str, const int len) +{ + int i; + for (i = 0; i < len; ++i) { + putc(str[i]); + } +} + +/** @} + */ + Index: boot/arch/arm32/loader/types.h =================================================================== --- boot/arch/arm32/loader/types.h (revision 6b781c0c856d94b3114ccd6375bc6667a19e9bfe) +++ boot/arch/arm32/loader/types.h (revision 6b781c0c856d94b3114ccd6375bc6667a19e9bfe) @@ -0,0 +1,60 @@ +/* + * Copyright (c) 2006 Martin Decky + * 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 arm32boot + * @{ + */ +/** @file + * @brief Definitions of basic types like #uintptr_t. + */ + + +#ifndef BOOT_arm32_TYPES_H +#define BOOT_arm32_TYPES_H + + +#include + +typedef signed char int8_t; + +typedef unsigned char uint8_t; +typedef unsigned short uint16_t; +typedef unsigned int uint32_t; +typedef unsigned long long uint64_t; + +typedef uint32_t uintptr_t; +typedef uint32_t unative_t; + + +#endif + + +/** @} + */ +