blob: 545e60d17d14ef9c5d2c395b7941c56a39df090d [file] [log] [blame]
/* First stage loader bootstrap for both v0, v2 and SUNW,Ultra's IEEE 1275 PROM
designed for the romfs.
Copyright (C) 1996,1997,1998,2000 Jakub Jelinek
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
USA. */
#define BLOCK_START 0x3dc
#define promvec %l5
#define buffer %l0
#define fd %l6
#define stdouth %l7
#define promvers %l7
#define dest %l4
.text
.align 4
.global _start, letter_here, digit_here
_start:
bootmain:
tst %o4
be sparc_v8
sethi %hi(0x4000), buffer
or buffer, (BLOCK_START + 3 * 512), %i5
sethi %hi(0x10000), dest
mov %o4, promvec
add buffer, %lo(chosen), %o1
call prom11
add buffer, %lo(finddevice), %o0
ldx [dest + 32], fd
call getprop
add buffer, %lo(stdout), %o0
lduw [dest + 256], stdouth
call putchar
mov 'S', %o0
call getprop
add buffer, %lo(bootpath), %o0
add dest, 256, %o0
mov ':', %o4
2:
ldub [%o0], %o3
brz,pn %o3, 3f
cmp %o3, %o4
bne,a,pt %icc, 2b
inc %o0
3:
stb %o4, [%o0]
letter_here:
mov 0xDD, %o4
stb %o4, [%o0 + 1]
stb %g0, [%o0 + 2]
add dest, 256, %o1
call prom11
add buffer, %lo(open), %o0
ldx [dest + 32], fd
or buffer, BLOCK_START, %l2
lduw [%l2], %l3
add %l3, 4, %l3
sll %l3, 9, %o3
srl %l3, 23, %o2
call rwprom31
add buffer, %lo(seek), %o0
ldx [dest + 48], %o0
brlz,pn %o0, 9f
lduw [%l2 - 4], %l3
call putchar
mov 'I', %o0
sub %l3, 2048, %l3
mov %l3, %o3
add dest, 1024, %o2
call rwprom31
add buffer, %lo(read), %o0
ldx [dest + 48], %o0
cmp %o0, %l3
bne,pn %icc, 9f
mov fd, %o1
call prom11
add buffer, %lo(close), %o0
ldub [dest + 1024 + 0x08], %o0
cmp %o0, 'L'
bne,a,pn %icc, 10f
add buffer, %lo(exit), %o0
call putchar
flush dest + 1024
mov promvec, %o4
jmpl dest + 1024, %g0
clr %l3
putchar:
stb %o0, [buffer]
mov stdouth, %o1
mov buffer, %o2
mov 1, %o3
ba,pt %xcc, prom31
add buffer, %lo(write), %o0
9:
add buffer, %lo(exit), %o0
10:
call prom11
getprop:
stx %o0, [dest + 32]
add dest, 256, %o0
stx %o0, [dest + 40]
mov 1024, %o0
stx %o0, [dest + 48]
mov fd, %o1
add buffer, %lo(getprops), %o0
mov 4, %o2
stx %o2, [dest + 8]
2:
ba,pt %xcc, 1f
prom11:
mov 1, %o2
stx %o2, [dest + 8]
1:
stx %o0, [dest]
stx %o2, [dest + 16]
stx %o1, [dest + 24]
jmpl promvec + %g0, %g0
mov dest, %o0
rwprom31:
mov fd, %o1
prom31:
mov 3, %o4
stx %o4, [dest + 8]
stx %o2, [dest + 32]
ba,pt %xcc, 2b
stx %o3, [dest + 40]
finddevice:
.asciz "finddevice"
getprops:
.asciz "getprop"
bootpath:
.asciz "bootpath"
stdout:
.asciz "stdout"
open:
.asciz "open"
close:
.asciz "close"
seek:
.asciz "seek"
read:
.asciz "read"
write:
.asciz "write"
chosen:
.asciz "/chosen"
exit:
.asciz "exit"
.align 512
sparc_v8:
mov %o0, promvec
ld [promvec+4], promvers
sethi %hi(0x4000), buffer
sethi %hi(0x10000), dest
call putchar_v8
mov 'S', %o0
tst promvers
bne,a 1f
ld [promvec+136], %o0 ! pv_v2bootargs.bootpath
ld [promvec+128], %o0
ld [%o0], %o3 ! o3 = *pv_v0bootargs
lduh [%o3+132], %o1 ! 'sd', 'fd' or whatever
sll %o1, 8, %o1
or %o1, '(', %o1
sll %o1, 8, %o1
ld [%o3+136], %o0 ! controler id (hope it is less than 10)
add %o0, '0', %o0
or %o1, %o0, %o2
mov ',', %o1
sll %o1, 8, %o1
ld [%o3+140], %o4 ! unit id (again, hope nobody uses wide on v0 prom)
add %o4, '0', %o4
or %o4, %o1, %o4
sll %o4, 16, %o4
or %o4, %o1, %o4
digit_here:
or %o4, 0xDD, %o3
std %o2, [buffer + 0x400] ! put the 'sd(i,j,k' somewhere...
mov ')', %o2
sll %o2, 8, %o2
sth %o2, [buffer + 0x408] ! put there the rest ')\0' as well...
b 4f
ld [promvec+36], %o1 ! pv_v0devops.v0_devopen
1:
ld [promvec+172], %o1
ld [%o0], %o0
add buffer, 0x400, %o2
mov ':', %o4
2:
ldub [%o0], %o3
tst %o3
be 3f
cmp %o3, %o4
be 3f
stb %o3, [%o2]
add %o2, 1, %o2
b 2b
add %o0, 1, %o0
3:
stb %o4, [%o2]
ldub [buffer + (letter_here - _start + 3)], %o4
stb %o4, [%o2 + 1]
stb %g0, [%o2 + 2]
4:
call %o1
add buffer, 0x400, %o0
mov %o0, fd
or buffer, BLOCK_START, %l2
ld [%l2], %l3
tst promvers
bne 6f
add %l3, 4, %l3
ld [promvec+44], %o4 ! pv_v0devops.v0_rdblkdev
ld [%l2 - 4], %l2
srl %l2, 9, %l2
sub %l2, 4, %l2
mov %l2, %o1
mov %l3, %o2
mov dest, %o3
call %o4
mov fd, %o0
mov %o0, %l3
call putchar_v8
mov 'I', %o0
cmp %l3, %l2
b,a 0f
6:
ld [promvec+188], %o4 ! pv_v2devops.v2_dev_seek
mov %g0, %o1
sll %l3, 9, %o2
call %o4
mov fd, %o0
cmp %o0, -1
be 9f
ld [%l2 - 4], %l3
call putchar_v8
mov 'I', %o0
ld [promvec+180], %o4 ! pv_v2devops.v2_dev_read
sub %l3, 2048, %l3
mov %l3, %o2
mov dest, %o1
call %o4
mov fd, %o0
cmp %o0, %l3
0:
bne 9f
ldub [dest + 0x08], %o0
cmp %o0, 'L'
bne 9f
clr %l3
call putchar_v8
ld [promvec+176], %l1 ! pv_v2devops.v2_dev_close
tst promvers
be,a 8f
ld [promvec+40], %l1 ! pv_v0devops.v0_dev_close
8:
call %l1
mov fd, %o0
clr %o4 ! we are not an Ultra
jmpl dest + %g0, %g0
mov promvec, %o0
9:
ld [promvec+116], %g1
jmpl %g1 + %g0, %g0
putchar_v8:
tst promvers
bne 1f
ld [promvec+92], %o1 ! pv_nbputchar
jmpl %o1 + %g0, %g0
or buffer, (BLOCK_START + 3 * 512), %i5
1:
stb %o0, [buffer]
ld [promvec+148], %o0 ! pv_v2bootargs.fd_stdout
ld [promvec+184], %o3 ! pv_v2devops.v2_dev_write
mov buffer, %o1
ld [%o0], %o0
mov 1, %o2
jmpl %o3 + %g0, %g0
or buffer, (BLOCK_START + 3 * 512), %i5