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annotate src/cs/system/main/gcc/irq_twiddle.S @ 303:f76436d19a7a default tip

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!GPRS config: fix long-standing AT+COPS chance hanging bug There has been a long-standing bug in FreeCalypso going back years: sometimes in the AT command bring-up sequence of an ACI-only MS, the AT+COPS command would produce only a power scan followed by cessation of protocol stack activity (only L1 ADC traces), instead of the expected network search sequence. This behaviour was seen in different FC firmware versions going back to Citrine, and seemed to follow some law of chance, not reliably repeatable. This bug has been tracked down and found to be specific to !GPRS configuration, stemming from our TCS2/TCS3 hybrid and reconstruction of !GPRS support that was bitrotten in TCS3.2/LoCosto version. ACI module psa_mms.c, needed only for !GPRS, was missing in the TCS3 version and had to be pulled from TCS2 - but as it turns out, there is a new field in the MMR_REG_REQ primitive that needs to be set correctly, and that psa_mms.c module is the place where this initialization needed to be added.
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 08 Jun 2023 08:23:37 +0000
parents 4e78acac3d88
children
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4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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1 /*
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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2 * TI's L1 code (and possibly other parts of the software suite) calls
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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3 * functions named INT_DisableIRQ() and INT_EnableIRQ(); in TI's original
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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4 * fw they are implemented (in a very ugly manner, as usual) in the
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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5 * int.s entry point assembly module. Here we implement the same
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
Mychaela Falconia <falcon@freecalypso.org>
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6 * functions in a cleaner way.
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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7 */
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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8
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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9 #include "asm_defs.h"
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4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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11 .code 32
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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12 .text
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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13
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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14 .globl INT_DisableIRQ
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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15 INT_DisableIRQ:
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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16 mrs r0, CPSR
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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17 orr r0, r0, #LOCKOUT
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18 msr CPSR, r0
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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19 bx lr
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20
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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21 .globl INT_EnableIRQ
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22 INT_EnableIRQ:
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23 mrs r0, CPSR
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24 bic r0, r0, #LOCKOUT
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25 msr CPSR, r0
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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26 bx lr