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1246 lines
19 KiB
ArmAsm
1246 lines
19 KiB
ArmAsm
.section .text
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.globl setup_bats
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_start:
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.long 0xe00000 + 12
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.long 0
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.long 0
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_begin:
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sync
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isync
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lis %r1,stack@ha
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addi %r1,%r1,stack@l
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addi %r1,%r1,16384 - 0x10
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mfmsr %r8
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li %r0,0
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mtmsr %r0
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isync
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bl setup_bats
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li %r8,0x3030
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mtmsr %r8
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/* Store ofw call addr */
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mr %r21,%r5
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lis %r10,0xe00000@ha
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stw %r5,ofw_call_addr - _start@l(%r10)
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lis %r4,_binary_freeldr_tmp_end@ha
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addi %r4,%r4,_binary_freeldr_tmp_end@l
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lis %r3,_binary_freeldr_tmp_start@ha
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addi %r3,%r3,_binary_freeldr_tmp_start@l
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lis %r5,0x8000@ha
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addi %r5,%r5,0x8000@l
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bl copy_bits
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bl zero_registers
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lis %r3,0xe00000@ha
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addi %r3,%r3,freeldr_banner - _start
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bl ofw_print_string
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bl ofw_print_eol
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bl setup_exc
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/* Zero CTR */
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mtcr %r31
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lis %r3,0x8000@ha
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addi %r3,%r3,0x8000@l
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mtlr %r3
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lis %r3,call_ofw@ha
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addi %r3,%r3,call_ofw - _start
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b call_freeldr
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/*
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* lifted from ppc/boot/openfirmware/misc.S
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* Copyright (C) Paul Mackerras 1997.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation ; either version
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* 2 of the License, or (at your option) any later version.
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*/
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/*
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* Use the BAT2 & 3 registers to map the 1st 16MB of RAM to
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* the address given as the 1st argument.
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*/
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setup_bats:
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mfpvr 5
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rlwinm 5,5,16,16,31 /* r3 = 1 for 601, 4 for 604 */
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cmpwi 0,5,1
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li 0,0
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bne 4f
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mtibatl 3,0 /* invalidate BAT first */
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ori 3,3,4 /* set up BAT registers for 601 */
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li 4,0x7f
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mtibatu 2,3
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mtibatl 2,4
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oris 3,3,0x80
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oris 4,4,0x80
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mtibatu 3,3
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mtibatl 3,4
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b 5f
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4: mtdbatu 3,0 /* invalidate BATs first */
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mtibatu 3,0
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ori 3,3,0xff /* set up BAT registers for 604 */
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li 4,2
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mtdbatl 2,4
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mtdbatu 2,3
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mtibatl 2,4
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mtibatu 2,3
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oris 3,3,0x80
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oris 4,4,0x80
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mtdbatl 3,4
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mtdbatu 3,3
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mtibatl 3,4
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mtibatu 3,3
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5: sync
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isync
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blr
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.align 4
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call_freeldr:
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/* Get the address of the functions list --
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* Note:
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* Because of little endian switch we must use an even number of
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* instructions here.. Pad with a nop if needed. */
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mfmsr %r10
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ori %r10,%r10,1
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mtmsr %r10
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nop
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/* Note that this is little-endian from here on */
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blr
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nop
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.align 4
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call_ofw:
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/* R3 has the function offset to call (n * 4)
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* Other arg registers are unchanged.
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* Note that these 4 instructions are in reverse order due to
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* little-endian convention */
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andi. %r0,%r0,65534
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mfmsr %r0
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mtmsr %r0
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/* Now normal ordering resumes */
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subi %r1,%r1,0x100
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stw %r8,4(%r1)
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stw %r9,8(%r1)
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stw %r10,12(%r1)
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mflr %r8
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stw %r8,16(%r1)
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lis %r10,0xe00000@ha
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add %r9,%r3,%r10
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lwz %r3,ofw_functions - _start@l(%r9)
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mtctr %r3
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mr %r3,%r4
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mr %r4,%r5
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mr %r5,%r6
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mr %r6,%r7
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mr %r7,%r8
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/* Goto the swapped function */
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bctrl
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lwz %r8,16(%r1)
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mtlr %r8
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lwz %r8,4(%r1)
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lwz %r9,8(%r1)
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lwz %r10,12(%r1)
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addi %r1,%r1,0x100
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/* Ok, go back to little endian */
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mfmsr %r0
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ori %r0,%r0,1
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mtmsr %r0
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/* Note that this is little-endian from here on */
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blr
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nop
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zero_registers:
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xor %r2,%r2,%r2
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mr %r0,%r2
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mr %r3,%r2
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mr %r4,%r2
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mr %r5,%r2
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mr %r6,%r2
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mr %r7,%r2
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mr %r8,%r2
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mr %r9,%r2
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mr %r10,%r2
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mr %r11,%r2
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mr %r12,%r2
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mr %r13,%r2
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mr %r14,%r2
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mr %r15,%r2
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mr %r12,%r2
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mr %r13,%r2
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mr %r14,%r2
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mr %r15,%r2
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mr %r16,%r2
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mr %r17,%r2
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mr %r18,%r2
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mr %r19,%r2
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mr %r20,%r2
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mr %r21,%r2
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mr %r22,%r2
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mr %r23,%r2
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mr %r24,%r2
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mr %r25,%r2
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mr %r26,%r2
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mr %r27,%r2
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mr %r28,%r2
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mr %r29,%r2
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mr %r30,%r2
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mr %r31,%r2
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blr
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prim_strlen:
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mr %r5,%r3
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prim_strlen_loop:
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lbz %r4,0(%r3)
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cmpi 0,0,%r4,0
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beq prim_strlen_done
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addi %r3,%r3,1
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b prim_strlen_loop
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prim_strlen_done:
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sub %r3,%r3,%r5
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blr
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copy_bits:
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cmp 0,0,%r3,%r4
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beqlr
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lwz %r6,0(%r3)
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stw %r6,0(%r5)
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addi %r3,%r3,4
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addi %r5,%r5,4
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b copy_bits
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ofw_print_string_hook:
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bl ofw_print_number
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bl ofw_exit
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ofw_print_string:
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/* Reserve some stack space */
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subi %r1,%r1,32
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/* Save args */
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stw %r3,0(%r1)
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/* Save the lr, a scratch register */
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stw %r8,8(%r1)
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mflr %r8
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stw %r8,12(%r1)
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/* Load the package name */
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lis %r3,0xe00000@ha
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addi %r3,%r3,ofw_chosen_name - _start
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/* Fire */
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bl ofw_finddevice
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/* Load up for getprop */
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stw %r3,16(%r1)
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lis %r4,0xe00000@ha
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addi %r4,%r4,ofw_stdout_name - _start
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addi %r5,%r1,20
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li %r6,4
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bl ofw_getprop
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/* Measure the string and remember the length */
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lwz %r3,0(%r1)
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bl prim_strlen
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mr %r5,%r3
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lwz %r3,20(%r1)
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lwz %r4,0(%r1)
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/* Write the string */
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bl ofw_write
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/* Return */
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lwz %r8,12(%r1)
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mtlr %r8
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lwz %r8,8(%r1)
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addi %r1,%r1,32
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blr
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/* Print 8 hex digits representing a number in r3 */
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ofw_print_number:
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subi %r1,%r1,32
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stw %r8,0(%r1)
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mflr %r8
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stw %r8,4(%r1)
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stw %r9,8(%r1)
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xor %r9,%r9,%r9
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stw %r9,12(%r1)
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/* Set up and, devide, shift */
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mr %r8,%r3
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lis %r6,0xf0000000@ha
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lis %r7,0x10000000@ha
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li %r9,8
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ofw_number_loop:
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nop
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cmpi 0,0,%r9,0
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beq ofw_number_return
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subi %r9,%r9,1
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/* Body: isolate digit, divide, print */
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and %r5,%r6,%r8
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divwu %r4,%r5,%r7
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srwi %r6,%r6,4
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srwi %r7,%r7,4
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nop
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cmpi 0,0,%r4,10
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bge ofw_number_letter
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addi %r4,%r4,'0'
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b ofw_number_digit_out
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ofw_number_letter:
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addi %r4,%r4,'A' - 10
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ofw_number_digit_out:
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stb %r4,12(%r1)
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addi %r3,%r1,12
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stw %r6,16(%r1)
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stw %r7,20(%r1)
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stw %r8,24(%r1)
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stw %r9,28(%r1)
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bl ofw_print_string
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lwz %r6,16(%r1)
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lwz %r7,20(%r1)
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lwz %r8,24(%r1)
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lwz %r9,28(%r1)
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b ofw_number_loop
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ofw_number_return:
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/* Return */
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lwz %r9,8(%r1)
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lwz %r8,4(%r1)
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mtlr %r8
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lwz %r8,0(%r1)
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addi %r1,%r1,32
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blr
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ofw_print_eol:
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subi %r1,%r1,16
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stw %r8,0(%r1)
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mflr %r8
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stw %r8,4(%r1)
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li %r4,0x0d0a
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sth %r4,8(%r1)
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xor %r4,%r4,%r4
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sth %r4,10(%r1)
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addi %r3,%r1,8
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bl ofw_print_string
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lwz %r8,4(%r1)
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mtlr %r8
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lwz %r8,0(%r1)
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addi %r1,%r1,16
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blr
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ofw_print_nothing:
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subi %r1,%r1,16
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stw %r8,0(%r1)
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mflr %r8
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stw %r8,4(%r1)
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li %r4,0
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sth %r4,8(%r1)
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xor %r4,%r4,%r4
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sth %r4,10(%r1)
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addi %r3,%r1,8
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bl ofw_print_string
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lwz %r8,4(%r1)
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mtlr %r8
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lwz %r8,0(%r1)
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addi %r1,%r1,16
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blr
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ofw_print_space:
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subi %r1,%r1,16
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stw %r8,0(%r1)
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mflr %r8
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stw %r8,4(%r1)
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li %r4,0x2000
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sth %r4,8(%r1)
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xor %r4,%r4,%r4
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sth %r4,10(%r1)
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addi %r3,%r1,8
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bl ofw_print_string
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lwz %r8,4(%r1)
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mtlr %r8
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lwz %r8,0(%r1)
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addi %r1,%r1,16
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blr
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ofw_print_regs:
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/* Construct ofw exit call */
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subi %r1,%r1,0xa0
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stw %r0,0(%r1)
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stw %r1,4(%r1)
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stw %r2,8(%r1)
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stw %r3,12(%r1)
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stw %r4,16(%r1)
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stw %r5,20(%r1)
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stw %r6,24(%r1)
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stw %r7,28(%r1)
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stw %r8,32(%r1)
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stw %r9,36(%r1)
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stw %r10,40(%r1)
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stw %r11,44(%r1)
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stw %r12,48(%r1)
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stw %r13,52(%r1)
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stw %r14,56(%r1)
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stw %r15,60(%r1)
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stw %r16,64(%r1)
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stw %r17,68(%r1)
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stw %r18,72(%r1)
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stw %r19,76(%r1)
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stw %r20,80(%r1)
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stw %r21,84(%r1)
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stw %r22,88(%r1)
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stw %r23,92(%r1)
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stw %r24,96(%r1)
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stw %r25,100(%r1)
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stw %r26,104(%r1)
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stw %r27,108(%r1)
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stw %r28,112(%r1)
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stw %r29,116(%r1)
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stw %r30,120(%r1)
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stw %r31,124(%r1)
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mflr %r0
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stw %r0,128(%r1)
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mfcr %r0
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stw %r0,132(%r1)
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mfctr %r0
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stw %r0,136(%r1)
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mfmsr %r0
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stw %r0,140(%r1)
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/* Count at zero */
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xor %r0,%r0,%r0
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stw %r0,144(%r1)
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mr %r3,%r1
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stw %r3,148(%r1)
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/* Body, print the regname, then the register */
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ofw_register_loop:
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lwz %r3,144(%r1)
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cmpi 0,0,%r3,32
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beq ofw_register_special
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lis %r3,0xe00000@ha
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addi %r3,%r3,freeldr_reg_init - _start
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bl ofw_print_string
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lwz %r3,144(%r1)
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bl ofw_print_number
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bl ofw_print_space
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lwz %r3,144(%r1)
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mulli %r3,%r3,4
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add %r3,%r1,%r3
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lwz %r3,0(%r3)
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stw %r3,152(%r1)
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bl ofw_print_number
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lwz %r3,144(%r1)
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addi %r3,%r3,1
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stw %r3,144(%r1)
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b done_dump
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dump_optional:
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bl ofw_print_space
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bl ofw_print_space
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lwz %r3,152(%r1)
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lwz %r3,0(%r3)
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bl ofw_print_number
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bl ofw_print_space
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lwz %r3,152(%r1)
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lwz %r3,4(%r3)
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bl ofw_print_number
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bl ofw_print_space
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lwz %r3,152(%r1)
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lwz %r3,8(%r3)
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bl ofw_print_number
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bl ofw_print_space
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lwz %r3,152(%r1)
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lwz %r3,12(%r3)
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bl ofw_print_number
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bl ofw_print_space
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done_dump:
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bl ofw_print_eol
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b ofw_register_loop
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ofw_register_special:
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/* LR */
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lis %r3,0xe00000@ha
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addi %r3,%r3,freeldr_reg_lr - _start
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bl ofw_print_string
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bl ofw_print_space
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lwz %r3,128(%r1)
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bl ofw_print_number
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bl ofw_print_eol
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/* CR */
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lis %r3,0xe00000@ha
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addi %r3,%r3,freeldr_reg_cr - _start
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bl ofw_print_string
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bl ofw_print_space
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lwz %r3,132(%r1)
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bl ofw_print_number
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bl ofw_print_eol
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/* CTR */
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lis %r3,0xe00000@ha
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addi %r3,%r3,freeldr_reg_ctr - _start
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bl ofw_print_string
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bl ofw_print_space
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lwz %r3,136(%r1)
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bl ofw_print_number
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bl ofw_print_eol
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/* MSR */
|
|
lis %r3,0xe00000@ha
|
|
addi %r3,%r3,freeldr_reg_msr - _start
|
|
bl ofw_print_string
|
|
bl ofw_print_space
|
|
lwz %r3,140(%r1)
|
|
bl ofw_print_number
|
|
bl ofw_print_eol
|
|
|
|
/* Return */
|
|
lwz %r0,128(%r1)
|
|
mtlr %r0
|
|
|
|
lwz %r0,0(%r1)
|
|
lwz %r2,8(%r1)
|
|
lwz %r3,12(%r1)
|
|
|
|
lwz %r4,16(%r1)
|
|
lwz %r5,20(%r1)
|
|
lwz %r6,24(%r1)
|
|
lwz %r7,28(%r1)
|
|
|
|
addi %r1,%r1,0xa0
|
|
|
|
blr
|
|
|
|
ofw_finddevice_hook:
|
|
subi %r1,%r1,32
|
|
stw %r3,0(%r1)
|
|
mflr %r3
|
|
stw %r3,4(%r1)
|
|
lwz %r3,0(%r1)
|
|
bl ofw_finddevice
|
|
stw %r3,0(%r1)
|
|
lwz %r3,4(%r1)
|
|
mtlr %r3
|
|
lwz %r3,0(%r1)
|
|
addi %r1,%r1,32
|
|
blr
|
|
|
|
ofw_finddevice:
|
|
/* 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 finddevice name */
|
|
lis %r8,0xe00000@ha
|
|
addi %r9,%r8,ofw_finddevice_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_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
|
|
* 12 bytes for r8, r9, lr
|
|
*/
|
|
/* Reserve stack space ...
|
|
* 20 bytes for the ofw call,
|
|
* r8, r9, and lr */
|
|
subi %r1,%r1,48
|
|
|
|
/* Store r8, r9, lr */
|
|
stw %r8,32(%r1)
|
|
stw %r9,36(%r1)
|
|
mflr %r8
|
|
stw %r8,40(%r1)
|
|
|
|
/* Get getprop name */
|
|
lis %r8,0xe00000@ha
|
|
addi %r9,%r8,ofw_getprop_name - _start
|
|
stw %r9,0(%r1)
|
|
|
|
/* 4 Argument and 1 return */
|
|
li %r9,4
|
|
stw %r9,4(%r1)
|
|
li %r9,1
|
|
stw %r9,8(%r1)
|
|
|
|
stw %r3,12(%r1) /* Package */
|
|
stw %r4,16(%r1) /* Property */
|
|
stw %r5,20(%r1) /* Return buffer */
|
|
stw %r6,24(%r1) /* Buffer size */
|
|
|
|
/* Load up the call address */
|
|
lwz %r9,ofw_call_addr - _start(%r8)
|
|
mtlr %r9
|
|
|
|
/* Set argument */
|
|
mr %r3,%r1
|
|
|
|
/* Fire */
|
|
blrl
|
|
|
|
/* Workaround to a wierd crash ... not sure what causes it.
|
|
* XXX investigate me */
|
|
bl ofw_print_nothing
|
|
|
|
/* Return */
|
|
lwz %r3,28(%r1)
|
|
|
|
/* Restore registers */
|
|
lwz %r8,40(%r1)
|
|
mtlr %r8
|
|
lwz %r9,36(%r1)
|
|
lwz %r8,32(%r1)
|
|
|
|
addi %r1,%r1,48
|
|
|
|
/* Return */
|
|
blr
|
|
|
|
ofw_getprop:
|
|
/* Reserve stack space:
|
|
* 32 bytes for the ofw call
|
|
* 12 bytes for r8, r9, lr
|
|
*/
|
|
/* Reserve stack space ...
|
|
* 20 bytes for the ofw call,
|
|
* r8, r9, and lr */
|
|
subi %r1,%r1,48
|
|
|
|
/* Store r8, r9, lr */
|
|
stw %r8,32(%r1)
|
|
stw %r9,36(%r1)
|
|
mflr %r8
|
|
stw %r8,40(%r1)
|
|
|
|
/* Get getprop name */
|
|
lis %r8,0xe00000@ha
|
|
addi %r9,%r8,ofw_getprop_name - _start
|
|
stw %r9,0(%r1)
|
|
|
|
/* 4 Argument and 1 return */
|
|
li %r9,4
|
|
stw %r9,4(%r1)
|
|
li %r9,1
|
|
stw %r9,8(%r1)
|
|
|
|
stw %r3,12(%r1) /* Package */
|
|
stw %r4,16(%r1) /* Property */
|
|
stw %r5,20(%r1) /* Return buffer */
|
|
stw %r6,24(%r1) /* Buffer size */
|
|
|
|
/* Load up the call address */
|
|
lwz %r9,ofw_call_addr - _start(%r8)
|
|
mtlr %r9
|
|
|
|
/* Set argument */
|
|
mr %r3,%r1
|
|
|
|
/* Fire */
|
|
blrl
|
|
|
|
/* Return */
|
|
lwz %r3,28(%r1)
|
|
|
|
/* Restore registers */
|
|
lwz %r8,40(%r1)
|
|
|
|
mtlr %r8
|
|
lwz %r9,36(%r1)
|
|
lwz %r8,32(%r1)
|
|
|
|
addi %r1,%r1,48
|
|
|
|
/* Return */
|
|
blr
|
|
|
|
ofw_write:
|
|
/* Reserve stack space:
|
|
* 28 bytes for the ofw call
|
|
* 12 bytes for r8, r9, lr
|
|
*/
|
|
/* Reserve stack space ...
|
|
* 20 bytes for the ofw call,
|
|
* r8, r9, and lr */
|
|
subi %r1,%r1,48
|
|
|
|
nop
|
|
|
|
/* Store r8, r9, lr */
|
|
stw %r8,28(%r1)
|
|
stw %r9,32(%r1)
|
|
mflr %r8
|
|
stw %r8,36(%r1)
|
|
|
|
/* Get write name */
|
|
lis %r8,0xe00000@ha
|
|
addi %r9,%r8,ofw_write_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
|
|
|
|
/* Return */
|
|
lwz %r3,24(%r1)
|
|
|
|
/* Restore registers */
|
|
lwz %r8,36(%r1)
|
|
mtlr %r8
|
|
lwz %r9,32(%r1)
|
|
lwz %r8,28(%r1)
|
|
|
|
addi %r1,%r1,48
|
|
|
|
/* Return */
|
|
blr
|
|
|
|
ofw_read:
|
|
/* Reserve stack space:
|
|
* 28 bytes for the ofw call
|
|
* 12 bytes for r8, r9, lr
|
|
*/
|
|
/* Reserve stack space ...
|
|
* 20 bytes for the ofw call,
|
|
* r8, r9, and lr */
|
|
subi %r1,%r1,48
|
|
|
|
nop
|
|
|
|
/* Store r8, r9, lr */
|
|
stw %r8,28(%r1)
|
|
stw %r9,32(%r1)
|
|
mflr %r8
|
|
stw %r8,36(%r1)
|
|
|
|
/* Get read name */
|
|
lis %r8,0xe00000@ha
|
|
addi %r9,%r8,ofw_read_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
|
|
|
|
/* Return */
|
|
lwz %r3,24(%r1)
|
|
|
|
/* Restore registers */
|
|
lwz %r8,36(%r1)
|
|
mtlr %r8
|
|
lwz %r9,32(%r1)
|
|
lwz %r8,28(%r1)
|
|
|
|
addi %r1,%r1,48
|
|
|
|
/* Return */
|
|
blr
|
|
|
|
ofw_exit:
|
|
lis %r3,0xe00000@ha
|
|
addi %r3,%r3,freeldr_halt - _start
|
|
|
|
bl ofw_print_string
|
|
/*
|
|
ofw_exit_loop:
|
|
b ofw_exit_loop
|
|
*/
|
|
/* Load the exit name */
|
|
lis %r8,0xe00000@ha
|
|
addi %r9,%r8,ofw_exit_name - _start
|
|
stw %r9,0(%r1)
|
|
|
|
/* Zero args, zero returns */
|
|
xor %r9,%r9,%r9
|
|
stw %r9,4(%r1)
|
|
stw %r9,8(%r1)
|
|
|
|
/* Load up the call address */
|
|
lwz %r9,ofw_call_addr - _start(%r8)
|
|
mtlr %r9
|
|
|
|
mr %r3,%r1
|
|
|
|
/* 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_halt:
|
|
.ascii "ReactOS OpenFirmware Boot Program Halting\r\n\0"
|
|
|
|
freeldr_reg_init:
|
|
.ascii "r\0"
|
|
freeldr_reg_lr:
|
|
.ascii "lr \0"
|
|
freeldr_reg_cr:
|
|
.ascii "cr \0"
|
|
freeldr_reg_ctr:
|
|
.ascii "ctr\0"
|
|
freeldr_reg_msr:
|
|
.ascii "msr\0"
|
|
|
|
ofw_call_addr:
|
|
.long 0
|
|
|
|
ofw_memory_size:
|
|
.long 0
|
|
.long 0
|
|
.long 0
|
|
.long 0
|
|
|
|
ofw_finddevice_name:
|
|
.ascii "finddevice\0"
|
|
|
|
ofw_getprop_name:
|
|
.ascii "getprop\0"
|
|
|
|
ofw_write_name:
|
|
.ascii "write\0"
|
|
|
|
ofw_read_name:
|
|
.ascii "read\0"
|
|
|
|
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"
|
|
|
|
ofw_stdout_name:
|
|
.ascii "stdout\0"
|
|
|
|
ofw_memory_name:
|
|
.ascii "/memory@0\0"
|
|
|
|
ofw_reg_name:
|
|
.ascii "reg\0"
|
|
|
|
ofw_functions:
|
|
.long ofw_finddevice_hook
|
|
.long ofw_getprop_hook
|
|
.long ofw_write
|
|
.long ofw_read
|
|
.long ofw_exit
|
|
.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
|
|
|