URL
https://opencores.org/ocsvn/eco32/eco32/trunk
Subversion Repositories eco32
Compare Revisions
- This comparison shows the changes necessary to convert path
/eco32/trunk/disk/tools/mkmboot
- from Rev 17 to Rev 86
- ↔ Reverse comparison
Rev 17 → Rev 86
/stage1/mbr.s
4,8 → 4,8
|
; Runtime environment: |
; |
; This code must be loaded and started at 0xC0000000. |
; It allocates a stack from 0xC0001000 downwards. So |
; This code must be loaded and started at 0xC0010000. |
; It allocates a stack from 0xC0011000 downwards. So |
; it must run within 4K (code + data + stack). |
; |
; This code expects the disk number of the boot disk |
15,28 → 15,14
; The boot manager, which is loaded by this code, |
; must be in standalone (headerless) executable |
; format, stored at absolute disk sectors 2..31, |
; and gets loaded and started at 0xC0001000. |
; and gets loaded and started at 0xC0011000. |
|
.set stacktop,0xC0001000 ; top of stack |
.set loadaddr,0xC0001000 ; where to load the boot manager |
.set stacktop,0xC0011000 ; top of stack |
.set loadaddr,0xC0011000 ; where to load the boot manager |
|
.set cout,0xE0000018 ; ROM console output |
.set dskio,0xE0000030 ; ROM disk I/O |
.set cout,0xC0000018 ; the monitor's console output |
.set dskio,0xC0000030 ; the monitor's disk I/O |
|
; reset arrives here |
reset: |
j start |
|
; interrupts arrive here |
intrpt: |
j userMiss |
|
; user TLB misses arrive here |
userMiss: |
add $4,$0,intmsg ; we do not expect any interrupt |
jal msgout |
j halt |
|
; load the boot manager and start it |
start: |
add $29,$0,stacktop ; setup stack |
113,8 → 99,6
j halt1 |
|
; messages |
intmsg: |
.byte "unexpected interrupt", 0x0D, 0x0A, 0 |
strtmsg: |
.byte "MBR executing...", 0x0D, 0x0A, 0 |
dremsg: |
/stage1/Makefile
7,7 → 7,7
all: mbr.bin |
|
mbr.bin: mbr.o |
$(BUILD)/bin/ld -h -rc 0xC0000000 -o mbr.bin mbr.o |
$(BUILD)/bin/ld -h -rc 0xC0010000 -o mbr.bin mbr.o |
|
mbr.o: mbr.s |
$(BUILD)/bin/as -o mbr.o mbr.s |
/stage2/biolib.s
2,9 → 2,9
; biolib.s -- basic I/O library |
; |
|
.set cin,0xE0000010 |
.set cout,0xE0000018 |
.set dskio,0xE0000030 |
.set cin,0xC0000010 |
.set cout,0xC0000018 |
.set dskio,0xC0000030 |
|
.export getc |
.export putc |
/stage2/mboot.c
253,10 → 253,10
continue; |
} |
/* load boot sector of selected partition */ |
readDisk(ptr[part].start, (unsigned char *) 0xC0000000, 1); |
readDisk(ptr[part].start, (unsigned char *) 0xC0010000, 1); |
/* check for signature */ |
if ((*((unsigned char *) 0xC0000000 + SECTOR_SIZE - 2) != 0x55) || |
(*((unsigned char *) 0xC0000000 + SECTOR_SIZE - 1) != 0xAA)) { |
if ((*((unsigned char *) 0xC0010000 + SECTOR_SIZE - 2) != 0x55) || |
(*((unsigned char *) 0xC0010000 + SECTOR_SIZE - 1) != 0xAA)) { |
printf("boot sector of partition %d has no signature\n", part); |
continue; |
} |
266,6 → 266,6
/* boot manager finished, now go executing loaded boot sector */ |
startSector = ptr[part].start; |
numSectors = ptr[part].size; |
entryPoint = 0xC0000000; |
entryPoint = 0xC0010000; |
return 0; |
} |
/stage2/c0.s
41,7 → 41,7
add $8,$8,4 |
clrtest: |
bltu $8,$9,clrloop |
add $29,$0,0xC0010000 ; setup stack |
add $29,$0,0xC0020000 ; setup stack |
stw $16,$0,bootDisk ; make arguments available |
stw $17,$0,startSector |
stw $18,$0,numSectors |
/stage2/Makefile
7,7 → 7,7
all: mboot.bin |
|
mboot.bin: c0.o mboot.o biolib.o c1.o |
$(BUILD)/bin/ld -h -rc 0xC0001000 -o mboot.bin \ |
$(BUILD)/bin/ld -h -rc 0xC0011000 -o mboot.bin \ |
c0.o mboot.o biolib.o c1.o |
|
c0.o: c0.s |