.section .text
+ .globl setup_bats
+
_start:
.long 0xe00000 + 12
.long 0
.long 0
-/*
- * LIFTED FROM arch/macppc/stand/ofwboot/Locore.c
- * Copyright (C) 1995, 1996 Wolfgang Solfrank.
- * Copyright (C) 1995, 1996 TooLs GmbH.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. 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.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by TooLs GmbH.
- * 4. The name of TooLs GmbH may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
- */
-
_begin:
sync
isync
li %r0,0
mtmsr %r0
isync
-
- mtibatu 0,%r0
- mtibatu 1,%r0
- mtibatu 2,%r0
- mtibatu 3,%r0
- mtdbatu 0,%r0
- mtdbatu 1,%r0
- mtdbatu 2,%r0
- mtdbatu 3,%r0
-
- li %r9,0x12 /* BATL(0, BAT_M, BAT_PP_RW) */
- mtibatl 0,%r9
- mtdbatl 0,%r9
- li %r9,0x1ffe /* BATU(0, BAT_BL_256M, BAT_Vs) */
- mtibatu 0,%r9
- mtdbatu 0,%r9
- isync
+
+ bl setup_bats
li %r8,0x3030
mtmsr %r8
bl ofw_print_eol
+ bl setup_exc
+
/* Zero CTR */
mtcr %r31
addi %r3,%r3,call_ofw - _start
b call_freeldr
-
+
+/*
+ * lifted from ppc/boot/openfirmware/misc.S
+ * Copyright (C) Paul Mackerras 1997.
+ *
+ * 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.
+ */
+
+/*
+ * Use the BAT2 & 3 registers to map the 1st 16MB of RAM to
+ * the address given as the 1st argument.
+ */
+setup_bats:
+ mfpvr 5
+ rlwinm 5,5,16,16,31 /* r3 = 1 for 601, 4 for 604 */
+ cmpwi 0,5,1
+ li 0,0
+ bne 4f
+ mtibatl 3,0 /* invalidate BAT first */
+ ori 3,3,4 /* set up BAT registers for 601 */
+ li 4,0x7f
+ mtibatu 2,3
+ mtibatl 2,4
+ oris 3,3,0x80
+ oris 4,4,0x80
+ mtibatu 3,3
+ mtibatl 3,4
+ b 5f
+4: mtdbatu 3,0 /* invalidate BATs first */
+ mtibatu 3,0
+ ori 3,3,0xff /* set up BAT registers for 604 */
+ li 4,2
+ mtdbatl 2,4
+ mtdbatu 2,3
+ mtibatl 2,4
+ mtibatu 2,3
+ oris 3,3,0x80
+ oris 4,4,0x80
+ mtdbatl 3,4
+ mtdbatu 3,3
+ mtibatl 3,4
+ mtibatu 3,3
+5: sync
+ isync
+ blr
+
.align 4
call_freeldr:
/* Get the address of the functions list --
/* Return */
blr
+ofw_open:
+ /* Reserve stack space ...
+ * 20 bytes for the ofw call,
+ * r8, r9, and lr */
+ subi %r1,%r1,32
+
+ /* Store r8, r9, lr */
+ stw %r8,20(%r1)
+ stw %r9,24(%r1)
+ mflr %r8
+ stw %r8,28(%r1)
+
+ /* Get open name */
+ lis %r8,0xe00000@ha
+ addi %r9,%r8,ofw_open_name - _start
+ stw %r9,0(%r1)
+
+ /* 1 Argument and 1 return */
+ li %r9,1
+ stw %r9,4(%r1)
+ stw %r9,8(%r1)
+
+ stw %r3,12(%r1)
+
+ /* Load up the call address */
+ lwz %r9,ofw_call_addr - _start(%r8)
+ mtlr %r9
+
+ /* Set argument */
+ mr %r3,%r1
+
+ /* Fire */
+ blrl
+
+ lwz %r3,16(%r1)
+
+ /* Restore registers */
+ lwz %r8,28(%r1)
+ mtlr %r8
+ lwz %r9,24(%r1)
+ lwz %r8,20(%r1)
+
+ addi %r1,%r1,32
+
+ /* Return */
+ blr
+
ofw_getprop_hook:
/* Reserve stack space:
* 32 bytes for the ofw call
/* Fire */
blrl
/* No return from exit */
+
+ofw_child:
+ /* Reserve stack space ...
+ * 20 bytes for the ofw call,
+ * r8, r9, and lr */
+ subi %r1,%r1,32
+
+ /* Store r8, r9, lr */
+ stw %r8,20(%r1)
+ stw %r9,24(%r1)
+ mflr %r8
+ stw %r8,28(%r1)
+
+ /* Get child name */
+ lis %r8,0xe00000@ha
+ addi %r9,%r8,ofw_child_name - _start
+ stw %r9,0(%r1)
+
+ /* 1 Argument and 1 return */
+ li %r9,1
+ stw %r9,4(%r1)
+ stw %r9,8(%r1)
+
+ stw %r3,12(%r1)
+
+ /* Load up the call address */
+ lwz %r9,ofw_call_addr - _start(%r8)
+ mtlr %r9
+
+ /* Set argument */
+ mr %r3,%r1
+
+ /* Fire */
+ blrl
+
+ lwz %r3,16(%r1)
+
+ /* Restore registers */
+ lwz %r8,28(%r1)
+ mtlr %r8
+ lwz %r9,24(%r1)
+ lwz %r8,20(%r1)
+
+ addi %r1,%r1,32
+
+ /* Return */
+ blr
+
+ofw_peer:
+ /* Reserve stack space ...
+ * 20 bytes for the ofw call,
+ * r8, r9, and lr */
+ subi %r1,%r1,32
+
+ /* Store r8, r9, lr */
+ stw %r8,20(%r1)
+ stw %r9,24(%r1)
+ mflr %r8
+ stw %r8,28(%r1)
+
+ /* Get peer name */
+ lis %r8,0xe00000@ha
+ addi %r9,%r8,ofw_peer_name - _start
+ stw %r9,0(%r1)
+
+ /* 1 Argument and 1 return */
+ li %r9,1
+ stw %r9,4(%r1)
+ stw %r9,8(%r1)
+
+ stw %r3,12(%r1)
+
+ /* Load up the call address */
+ lwz %r9,ofw_call_addr - _start(%r8)
+ mtlr %r9
+
+ /* Set argument */
+ mr %r3,%r1
+
+ /* Fire */
+ blrl
+
+ lwz %r3,16(%r1)
+
+ /* Restore registers */
+ lwz %r8,28(%r1)
+ mtlr %r8
+ lwz %r9,24(%r1)
+ lwz %r8,20(%r1)
+
+ addi %r1,%r1,32
+
+ /* Return */
+ blr
+
+ofw_seek:
+ /* Reserve stack space ...
+ * 20 bytes for the ofw call,
+ * r8, r9, and lr */
+ subi %r1,%r1,32
+
+ /* Store r8, r9, lr */
+ stw %r8,20(%r1)
+ stw %r9,24(%r1)
+ mflr %r8
+ stw %r8,28(%r1)
+
+ /* Get peer name */
+ lis %r8,0xe00000@ha
+ addi %r9,%r8,ofw_seek_name - _start
+ stw %r9,0(%r1)
+
+ /* 3 Arguments and 1 return */
+ li %r9,3
+ stw %r9,4(%r1)
+ li %r9,1
+ stw %r9,8(%r1)
+
+ stw %r3,12(%r1)
+ stw %r4,16(%r1)
+ stw %r5,20(%r1)
+
+ /* Load up the call address */
+ lwz %r9,ofw_call_addr - _start(%r8)
+ mtlr %r9
+
+ /* Set argument */
+ mr %r3,%r1
+
+ /* Fire */
+ blrl
+
+ lwz %r3,16(%r1)
+
+ /* Restore registers */
+ lwz %r8,28(%r1)
+ mtlr %r8
+ lwz %r9,24(%r1)
+ lwz %r8,20(%r1)
+
+ addi %r1,%r1,32
+
+ /* Return */
+ blr
+
+
+setup_exc:
+ subi %r1,%r1,32
+
+ stw %r3,0(%r1)
+ mflr %r3
+ stw %r3,4(%r1)
+ stw %r8,8(%r1)
+ stw %r9,12(%r1)
+ stw %r10,16(%r1)
+ stw %r12,20(%r1)
+
+ lis %r8,0xe00000@ha
+ xor %r12,%r12,%r12
+ addi %r12,%r12,0x300
+ addi %r9,%r8,dsi_exc - _start
+ addi %r10,%r8,dsi_end - _start
+
+copy_loop:
+ cmp 0,0,%r9,%r10
+ beq ret_setup_exc
+
+ mr %r3,%r12
+ bl ofw_print_number
+ bl ofw_print_space
+
+ lwz %r3,0(%r9)
+ stw %r3,0(%r12)
+
+ bl ofw_print_number
+ bl ofw_print_eol
+
+ addi %r12,%r12,4
+ addi %r9,%r9,4
+ b copy_loop
+
+ret_setup_exc:
+ mfmsr %r12
+ andi. %r12,%r12,0xffbf
+ mtmsr %r12
+
+ lwz %r12,20(%r1)
+ lwz %r10,16(%r1)
+ lwz %r9,12(%r1)
+ lwz %r8,8(%r1)
+
+ lwz %r3,4(%r1)
+ mtlr %r3
+ lwz %r3,0(%r1)
+
+ blr
+
+dsi_exc:
+ subi %r1,%r1,16
+
+ stw %r0,0(%r1)
+ stw %r3,4(%r1)
+
+ mfsrr0 %r3
+ addi %r3,%r3,4
+ mtsrr0 %r3
+
+ /* mfsrr1 %r3 */
+ /* ori %r3,%r3,2 */
+ /* mtsrr1 %r3 */
+ lwz %r3,4(%r1)
+ lwz %r0,0(%r1)
+
+ addi %r1,%r1,16
+ rfi
+dsi_end:
+
.org 0x1000
freeldr_banner:
.ascii "ReactOS OpenFirmware Boot Program\r\n\0"
freeldr_reg_init:
.ascii "r\0"
-
freeldr_reg_lr:
.ascii "lr \0"
freeldr_reg_cr:
ofw_exit_name:
.ascii "exit\0"
+ofw_open_name:
+ .ascii "open\0"
+
+ofw_child_name:
+ .ascii "child\0"
+
+ofw_peer_name:
+ .ascii "peer\0"
+
+ofw_seek_name:
+ .ascii "seek\0"
+
ofw_chosen_name:
.ascii "/chosen\0"
.long ofw_print_regs
.long ofw_print_string
.long ofw_print_number
+ .long ofw_open
+ .long ofw_child
+ .long ofw_peer
+ .long ofw_seek
.org 0x2000
stack:
.space 0x4000
+
projects / reactos.git / blobdiff