FreeCalypso > hg > freecalypso-tools
annotate target-utils/c139-lldbg/entry.S @ 619:f82551c77e58
libserial-newlnx: ASYNC_LOW_LATENCY patch reverted
Reports from Das Signal indicate that loadtools performance on Debian
is about the same as on Slackware, and that including or omitting the
ASYNC_LOW_LATENCY patch from Serg makes no difference. Because the
patch in question does not appear to be necessary, it is being reverted
until and unless someone other than Serg reports an actual real-world
system on which loadtools operation times are slowed compared to the
Mother's Slackware reference and on which Slackware-like performance
can be restored by setting the ASYNC_LOW_LATENCY flag.
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Thu, 27 Feb 2020 01:09:48 +0000 |
parents | e7502631a0f9 |
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0
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1 .text |
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2 .globl _entry |
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3 _entry: |
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4 .code 16 |
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5 bx pc |
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6 nop |
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7 |
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8 .code 32 |
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9 stmfd sp!, {r0-r12,lr} |
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10 mrs r0, CPSR |
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11 mov r1, sp |
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12 /* supervisor mode, disable all interrupts */ |
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13 msr CPSR_c, #0xd3 |
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14 ldr sp, =stack_bottom |
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15 /* save entry SP and CPSR */ |
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16 ldr r2, =lldbg_entry_cpsr |
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17 str r0, [r2] |
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18 ldr r2, =lldbg_entry_sp |
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19 str r1, [r2] |
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20 b main |