minoura
parent
446e0c768b
commit
d83cae1ca8
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@ -0,0 +1,54 @@
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# $NetBSD: Makefile,v 1.1 2001/09/28 15:22:21 minoura Exp $
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.include <bsd.own.mk>
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BOOT= boot_ustar
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VERSION=1.0
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# text and bss addresses in hex
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TEXT= 002000 # Primary (me)
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BOOT_TEXT= 006000 # Secondary (/boot)
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PROG= $(BOOT)
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BINDIR= /usr/mdec
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STRIPFLAG=
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BINMODE= 444
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MKMAN= no
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OBJCOPY?= objcopy
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COMMONDIR= ${.CURDIR}/../common
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LIBIOCS= ${.CURDIR}/../libiocs
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#.PATH: ${COMMONDIR}
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#SRCS= boot_ustar.S exec_image.S
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SRCS= boot_ustar.S
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CPPFLAGS+= -DTEXTADDR="0x$(TEXT)" -DBOOT_TEXTADDR="0x$(BOOT_TEXT)"
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CPPFLAGS+= -DBOOT=\"$(BOOT)\" -DBOOT_VERS=\"$(VERSION)\"
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CPPFLAGS+= -I${COMMONDIR} -I${LIBIOCS}
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AFLAGS= ${CFLAGS:M-[ID]*}
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.if ${OBJECT_FMT} == "ELF"
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LDFLAGS= -n -Bstatic -T ${.CURDIR}/${BOOT}.ldscript
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LDFLAGS+= -noinhibit-exec # XXX
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.else
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LDFLAGS= -n -Bstatic -Ttext ${TEXT}
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.endif
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CLEANFILES= $(BOOT).x s.x x.s x.o
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$(BOOT): $(OBJS)
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$(LD) $(LDFLAGS) -o $(BOOT).x $(OBJS) $(LDADD)
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@$(NM) --target=a.out-m68k-netbsd $(BOOT).x | sed -n '/T first_kbyte/p'
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@if [ `(echo ibase=16; \
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$(NM) --target=a.out-m68k-netbsd $(BOOT).x | sed -n 's/T first_kbyte/-$(TEXT)-400/p' | \
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tr a-f A-F) | bc` -gt 0 ];\
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then echo '$(BOOT): first_kbyte exceeds the first killobyte'; exit 1; fi
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@$(SIZE) --target=a.out-m68k-netbsd $(BOOT).x
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@if [ `(echo ibase=16; \
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$(NM) --target=a.out-m68k-netbsd $(BOOT).x | sed -n 's/D _edata/-$(TEXT)-2000/p' | tr a-f A-F) |\
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bc` -gt 0 ];\
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then echo '$(BOOT): text+data is too large'; exit 1; fi
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@$(OBJCOPY) -I a.out-m68k-netbsd -O binary $(BOOT).x $(BOOT)
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.include <bsd.prog.mk>
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@ -0,0 +1,176 @@
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| file: boot_ustar.S
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| author: chapuni(webmaster@chapuni.com)
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| Yasha(itohy@netbsd.org)
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| minoura@netbsd.org
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| $NetBSD: boot_ustar.S,v 1.1 2001/09/28 15:22:22 minoura Exp $
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| supports floppy only
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#include <sys/reboot.h>
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#include <machine/asm.h>
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#include <machine/bootinfo.h>
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#include "iocscall.h"
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#define BOOT_ERROR(s) jbsr boot_error; .asciz s; .even
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#define READ_BUFFER 0x000e0000
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.text
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ASENTRY_NOPROFILE(start)
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ASENTRY_NOPROFILE(top)
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bras _ASM_LABEL(entry0)
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.ascii "SHARP/"
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.ascii "X680x0"
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.word 0x8199,0x94e6,0x82ea,0x82bd
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.word 0x8e9e,0x82c9,0x82cd,0x8cbb
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.word 0x8ec0,0x93a6,0x94f0,0x8149
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.word 0
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ASENTRY_NOPROFILE(entry0)
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IOCS(__BOOTINF)
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lsll #8,%d0 | clear MSByte
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lsrl #8,%d0 |
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| 0x80...0x8F SASI
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| 0x90...0x93 Floppy
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| 0xED0000...0xED3FFE SRAM
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| others ROM (SCSI?)
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movel %d0,%d1
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clrb %d1
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tstl %d1
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jne boot_dev_unsupported
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bra _ASM_LABEL(entry)
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| Disklabel= 404bytes
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| Since LABELLOFFSET in <machine/disklabel.h> is 0x40,
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| entry must be after 0x000001d4 (0x000021d4)
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nop
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GLOBAL(disklabel)
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.space 404
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ASENTRY_NOPROFILE(entry)
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| SASI or Floppy
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movel %d0,%d4
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andib #0xFC,%d0
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cmpib #0x90,%d0
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jne boot_dev_unsupported | boot from SASI?
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| Floppy
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| read first 64KB (XXX: CONSTANT!!)
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andib #0x03,%d0 | drive # (head=0)
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jbsr check_fd_format
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moveb %d4,%d2
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lslw #8,%d2
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moveq #0x70,%d1
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orw %d2,%d1 | PDA*256 + MODE
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movel %d0,%d2 | read position (first sector)
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movel #65536,%d3 | read bytes
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moval #(BOOT_TEXTADDR-8192-0x200-32),%a1
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moval %a1,%a4 | save buffer addr
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IOCS(__B_READ)
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jra boot_read_done
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#include "chkfmt.s"
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boot_dev_unsupported:
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BOOT_ERROR("unsupported boot device")
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booterr_msg: .ascii "\r\n\n"
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.ascii BOOT
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.asciz ": "
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reboot_msg: .asciz "\r\n[Hit key to reboot]"
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.even
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ASENTRY_NOPROFILE(boot_error)
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lea %pc@(booterr_msg),%a1
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IOCS(__B_PRINT)
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moveal %sp@+,%a1
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IOCS(__B_PRINT)
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lea %pc@(reboot_msg),%a1
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IOCS(__B_PRINT)
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| wait for a key press (or release of a modifier)
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IOCS(__B_KEYINP)
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| issue software reset
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trap #10
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| NOTREACHED
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boot_read_done:
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lea %a4@(8192),%a1 | USTAR header
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#if 0 /* too big to fit */
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cmpl #0x55535441,%a1@ | filename `USTA
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bne error_invalidname
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#endif
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cmpl #0x522e766f,%a1@(4) | R.vo...'
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bne error_invalidname
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cmpl #0x00757374,%a1@(256) | magic `\0ust'
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bne error_invalidfs
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cmpl #0x61722020,%a1@(260) | magic `ar '
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bne error_invalidfs
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lea %a1@(0x200),%a2 | a.out header
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movml %a2@+,%d0-%d4/%a5
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addal #8,%a2 | start of text
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#if 0
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cmpal #BOOT_TEXTADDR,%a5
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bne error_invalidboot
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#endif
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cmpl #0x00870107,%d0 | a.out magic
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bne error_invalidmagic
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addl %d2,%d1 | a_text+a_data
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movl %d3,%d4 | save a_bss
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addl %d1,%d3 | a_text+a_data+a_bss
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/* clear out bss */
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lea %a2@(%d1),%a3
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1: movb #0,%a3@+
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subl #1,%d4
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bne 1b
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andil #3,%d4
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swap %d4
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addil #(B_DEVMAGIC+X68K_MAJOR_FD),%d4
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movl #RB_SINGLE,%sp@- | boothowto
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movl %d4,%sp@- | bootdev
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movl %d3,%sp@- | size
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pea %a5@ | entry
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pea %a5@ | executed
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pea %a5@ | loaded
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jbsr _C_LABEL(exec_image)
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error_invalidname:
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error_invalidfs:
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error_invalidmagic: BOOT_ERROR("Invalid boot disk")
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| void memcpy(void *dst, const void *src, size_t count);
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| small and slow memcpy...
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| THIS FUNCTION DOES NOT CONFORM THE ANSI STANDARD
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ENTRY_NOPROFILE(memcpy)
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lea %sp@(12),%a1
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movel %a1@,%d1 | count
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| jeq Lmcpret
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moveal %a1@-,%a0 | src
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moveal %a1@-,%a1 | dest
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1: moveb %a0@+,%a1@+
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subql #1,%d1
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jne 1b
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Lmcpret:
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| movel %sp@(8),%d0 | uncomment this to conform ANSI
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rts
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#include "exec_image.S"
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ASGLOBAL(first_kbyte)
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@ -0,0 +1,49 @@
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OUTPUT_FORMAT("a.out-m68k-netbsd", "a.out-m68k-netbsd",
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"a.out-m68k-netbsd")
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OUTPUT_ARCH(m68k)
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ENTRY(start)
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SEARCH_DIR(/usr/lib);
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/*__DYNAMIC = 0; */
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PROVIDE (__stack = 0);
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SECTIONS
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{
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. = 0x00002000;
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.text :
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{
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CREATE_OBJECT_SYMBOLS
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*(.text)
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*(.rodata)
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/* The next six sections are for SunOS dynamic linking. The order
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is important. */
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*(.dynrel)
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*(.hash)
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*(.dynsym)
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*(.dynstr)
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*(.rules)
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*(.need)
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etext = .;
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_etext = .;
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}
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/* . = ALIGN(0x2000); */
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.data :
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{
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/* The first three sections are for SunOS dynamic linking. */
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*(.dynamic)
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*(.got)
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*(.plt)
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*(.data)
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*(.linux-dynamic) /* For Linux dynamic linking. */
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CONSTRUCTORS
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edata = .;
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_edata = .;
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}
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.bss :
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{
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__bss_start = .;
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*(.bss)
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*(COMMON)
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end = ALIGN(4) ;
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_end = ALIGN(4) ;
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}
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/DISCARD/ : { *(.ident) *(.stab) *(.stabstr) }
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}
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