The DBGOSECCR characteristics are:
Provides a mechanism for an operating system to access the contents of EDECCR that are otherwise invisible to software, so it can save/restore the contents of EDECCR over powerdown on behalf of the external debugger.
AArch32 System register DBGOSECCR bits [31:0] are architecturally mapped to AArch64 System register OSECCR_EL1[31:0] .
AArch32 System register DBGOSECCR bits [31:0] are architecturally mapped to External register EDECCR[31:0] .
If DBGOSLSR.OSLK == 0 then DBGOSECCR returns an UNKNOWN value on reads and ignores writes.
DBGOSECCR is a 32-bit register.
The DBGOSECCR bit assignments are:
31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
EDECCR |
Used for save/restore to EDECCR over powerdown.
Reads or writes to this field are indirect accesses to EDECCR.
Accesses to this register use the following encodings:
opc1 | opc2 | CRn | coproc | CRm |
---|---|---|---|---|
0b000 | 0b010 | 0b0000 | 0b1110 | 0b0110 |
if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if EL2Enabled() && !ELUsingAArch32(EL2) && MDCR_EL2.<TDE,TDA> != '00' then AArch64.AArch32SystemAccessTrap(EL2, 0x05); elsif EL2Enabled() && ELUsingAArch32(EL2) && HDCR.<TDE,TDA> != '00' then AArch32.TakeHypTrapException(0x05); elsif HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDA == '1' then AArch64.AArch32SystemAccessTrap(EL3, 0x05); else return DBGOSECCR; elsif PSTATE.EL == EL2 then if HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDA == '1' then AArch64.AArch32SystemAccessTrap(EL3, 0x05); else return DBGOSECCR; elsif PSTATE.EL == EL3 then return DBGOSECCR;
opc1 | opc2 | CRn | coproc | CRm |
---|---|---|---|---|
0b000 | 0b010 | 0b0000 | 0b1110 | 0b0110 |
if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if EL2Enabled() && !ELUsingAArch32(EL2) && MDCR_EL2.<TDE,TDA> != '00' then AArch64.AArch32SystemAccessTrap(EL2, 0x05); elsif EL2Enabled() && ELUsingAArch32(EL2) && HDCR.<TDE,TDA> != '00' then AArch32.TakeHypTrapException(0x05); elsif HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDA == '1' then AArch64.AArch32SystemAccessTrap(EL3, 0x05); else DBGOSECCR = R[t]; elsif PSTATE.EL == EL2 then if HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDA == '1' then AArch64.AArch32SystemAccessTrap(EL3, 0x05); else DBGOSECCR = R[t]; elsif PSTATE.EL == EL3 then DBGOSECCR = R[t];
13/12/2018 16:42; 6379d01c197f1d40720d32d0f84c419c9187c009
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