Separate more clearly bootloader from xv6 by renaming multiboot.S to entry.S etc.
Maybe the string boot shouldn't appear in xv6 code?
This commit is contained in:
Frans Kaashoek
parent
c95ce31c59
commit
c60a3551c2
20
Makefile
20
Makefile
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@ -97,11 +97,11 @@ bootblock: bootasm.S bootmain.c
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$(OBJCOPY) -S -O binary -j .text bootblock.o bootblock
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./sign.pl bootblock
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bootother: bootother.S
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$(CC) $(CFLAGS) -fno-pic -nostdinc -I. -c bootother.S
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$(LD) $(LDFLAGS) -N -e start -Ttext 0x7000 -o bootblockother.o bootother.o
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$(OBJCOPY) -S -O binary -j .text bootblockother.o bootother
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$(OBJDUMP) -S bootblockother.o > bootother.asm
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entryother: entryother.S
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$(CC) $(CFLAGS) -fno-pic -nostdinc -I. -c entryother.S
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$(LD) $(LDFLAGS) -N -e start -Ttext 0x7000 -o bootblockother.o entryother.o
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$(OBJCOPY) -S -O binary -j .text bootblockother.o entryother
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$(OBJDUMP) -S bootblockother.o > entryother.asm
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initcode: initcode.S
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$(CC) $(CFLAGS) -nostdinc -I. -c initcode.S
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@ -109,8 +109,8 @@ initcode: initcode.S
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$(OBJCOPY) -S -O binary initcode.out initcode
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$(OBJDUMP) -S initcode.o > initcode.asm
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kernel: $(OBJS) multiboot.o data.o bootother initcode
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$(LD) $(LDFLAGS) -T kernel.ld -e multiboot_entry -o kernel multiboot.o data.o $(OBJS) -b binary initcode bootother
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kernel: $(OBJS) entry.o data.o entryother initcode
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$(LD) $(LDFLAGS) -T kernel.ld -e multiboot_entry -o kernel entry.o data.o $(OBJS) -b binary initcode entryother
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$(OBJDUMP) -S kernel > kernel.asm
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$(OBJDUMP) -t kernel | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$$/d' > kernel.sym
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@ -121,12 +121,12 @@ kernel: $(OBJS) multiboot.o data.o bootother initcode
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# great for testing the kernel on real hardware without
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# needing a scratch disk.
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MEMFSOBJS = $(filter-out ide.o,$(OBJS)) memide.o
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kernelmemfs: $(MEMFSOBJS) multiboot.o data.o bootother initcode fs.img
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$(LD) $(LDFLAGS) -Ttext 0x100000 -e main -o kernelmemfs multiboot.o data.o $(MEMFSOBJS) -b binary initcode bootother fs.img
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kernelmemfs: $(MEMFSOBJS) entry.o data.o entryother initcode fs.img
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$(LD) $(LDFLAGS) -Ttext 0x100000 -e main -o kernelmemfs entry.o data.o $(MEMFSOBJS) -b binary initcode entryother fs.img
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$(OBJDUMP) -S kernelmemfs > kernelmemfs.asm
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$(OBJDUMP) -t kernelmemfs | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$$/d' > kernelmemfs.sym
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tags: $(OBJS) bootother.S _init
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tags: $(OBJS) entryother.S _init
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etags *.S *.c
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vectors.S: vectors.pl
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@ -58,7 +58,7 @@ start32:
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orl $(CR0_PE|CR0_PG|CR0_WP), %eax
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movl %eax, %cr0
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# Switch to the stack allocated by bootothers()
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# Switch to the stack allocated by entryothers()
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movl (start-4), %esp
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# Call mpboot()
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call *(start-8)
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22
main.c
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main.c
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@ -6,7 +6,7 @@
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#include "proc.h"
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#include "x86.h"
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static void bootothers(void);
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static void enterothers(void);
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static void mpmain(void) __attribute__((noreturn));
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extern pde_t *kpgdir;
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@ -33,14 +33,14 @@ main(void)
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ideinit(); // disk
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if(!ismp)
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timerinit(); // uniprocessor timer
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bootothers(); // start other processors (must come before kinit; must use boot_alloc)
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enterothers(); // start other processors (must come before kinit; must use boot_alloc)
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kinit(); // initialize memory allocator
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userinit(); // first user process (must come after kinit)
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// Finish setting up this processor in mpmain.
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mpmain();
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}
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// Other CPUs jump here from bootother.S.
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// Other CPUs jump here from entryother.S.
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static void
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mpboot(void)
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{
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@ -56,7 +56,7 @@ mpmain(void)
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{
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cprintf("cpu%d: starting\n", cpu->id);
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idtinit(); // load idt register
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xchg(&cpu->booted, 1); // tell bootothers() we're up
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xchg(&cpu->booted, 1); // tell enterothers() we're up
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scheduler(); // start running processes
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}
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@ -64,24 +64,24 @@ pde_t bootpgdir[];
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// Start the non-boot processors.
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static void
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bootothers(void)
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enterothers(void)
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{
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extern uchar _binary_bootother_start[], _binary_bootother_size[];
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extern uchar _binary_entryother_start[], _binary_entryother_size[];
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uchar *code;
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struct cpu *c;
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char *stack;
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// Write bootstrap code to unused memory at 0x7000.
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// The linker has placed the image of bootother.S in
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// _binary_bootother_start.
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// The linker has placed the image of entryother.S in
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// _binary_entryother_start.
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code = p2v(0x7000);
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memmove(code, _binary_bootother_start, (uint)_binary_bootother_size);
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memmove(code, _binary_entryother_start, (uint)_binary_entryother_size);
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for(c = cpus; c < cpus+ncpu; c++){
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if(c == cpus+cpunum()) // We've started already.
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continue;
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// Tell bootother.S what stack to use, the address of mpboot and pgdir;
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// Tell entryother.S what stack to use, the address of mpboot and pgdir;
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// We cannot use kpgdir yet, because the AP processor is running in low
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// memory, so we use bootpgdir for the APs too. kalloc can return addresses
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// above 4Mbyte (the machine may have much more physical memory than 4Mbyte), which
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@ -101,7 +101,7 @@ bootothers(void)
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}
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}
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// Boot page table used in multiboot.S and bootother.S.
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// Boot page table used in multiboot.S and entryother.S.
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// Page directories (and page tables), must start on a page boundary,
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// hence the "__aligned__" attribute. Also, because of restrictions
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// related to linking and static initializers, we use "x + PTE_P"
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