43,56 → 43,8 |
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.global kernel_image_start |
kernel_image_start: |
0: |
b 1f |
nop |
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/* |
* This header forces SILO to load the kernel at 0x4000. |
* More precisely, SILO will think this is an old version of Linux. |
*/ |
.ascii "HdrS" |
.word 0 |
.half 0 |
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.align 8 |
|
1: |
flushw ! flush all but the active register window |
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/* |
* Prepare to copy the kernel image to 4M. |
*/ |
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set LMA, %g1 ! source address |
set VMA, %g2 ! destination address |
set hardcoded_ktext_size, %g3 ! link address of hardcoded_ktext_size |
set hardcoded_kdata_size, %g4 ! link address of hardcoded_kdata_size |
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sub %g3, %g2, %g3 ! offset of hardcoded_ktext_size from the beginning of the load address |
sub %g4, %g2, %g4 ! offset of hardcoded_kdata_size from the beginning of the load address |
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ldx [%g3 + %g1], %g3 ! hardcoded_ktext_size -> %g3 |
ldx [%g4 + %g1], %g4 ! hardcoded_kdata_size -> %g4 |
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add %g3, %g4, %g3 ! size of kernel text and data |
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/* |
* Start copying the kernel from higher addresses towards lower addresses. |
*/ |
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2: dec %g3 |
ldub [%g1 + %g3], %g4 |
stb %g4, [%g2 + %g3] |
cmp %g3, 0 |
bnz 2b |
nop |
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set relocated, %g1 |
jmp %g1 |
nop |
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relocated: |
set ofw, %l0 |
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call ofw_init |