The DBGBVR<n>_EL1 characteristics are:
Holds a virtual address, or a VMID and/or a context ID, for use in breakpoint matching. Forms breakpoint n together with control register DBGBCR<n>_EL1.
AArch64 System register DBGBVR<n>_EL1 bits [31:0] are architecturally mapped to AArch32 System register DBGBVR<n>[31:0] .
AArch64 System register DBGBVR<n>_EL1 bits [63:32] are architecturally mapped to AArch32 System register DBGBXVR<n>[31:0] .
AArch64 System register DBGBVR<n>_EL1 bits [63:0] are architecturally mapped to External register DBGBVR<n>_EL1[63:0] .
How this register is interpreted depends on the value of DBGBCR<n>_EL1.BT.
For other values of DBGBCR<n>_EL1.BT, this register is RES0.
If breakpoint n is not implemented then accesses to this register are UNDEFINED.
DBGBVR<n>_EL1 is a 64-bit register.
The DBGBVR<n>_EL1 bit assignments are:
63 | 62 | 61 | 60 | 59 | 58 | 57 | 56 | 55 | 54 | 53 | 52 | 51 | 50 | 49 | 48 | 47 | 46 | 45 | 44 | 43 | 42 | 41 | 40 | 39 | 38 | 37 | 36 | 35 | 34 | 33 | 32 |
RESS[14:4] | Bits[52:49] | VA[48:2] | |||||||||||||||||||||||||||||
VA[48:2] | RES0 | ||||||||||||||||||||||||||||||
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 |
Reserved, Sign extended. Software must set all bits in this field to the same value as the most significant bit of the VA field. If all bits in this field are not the same value as the most significant bit of the VA field, then all of the following apply:
Extension to VA[48:2]. See VA[48:2] for more details.
On a Cold reset, this field resets to an architecturally UNKNOWN value.
Extension to RESS[14:4]. See RESS[14:4] for more details.
Bits[48:2] of the address value for comparison.
When FEAT_LVA is implemented, VA[52:49] forms the upper part of the address value. Otherwise, bits [52:49] are part of the RESS field.
On a Cold reset, this field resets to an architecturally UNKNOWN value.
Reserved, RES0.
63 | 62 | 61 | 60 | 59 | 58 | 57 | 56 | 55 | 54 | 53 | 52 | 51 | 50 | 49 | 48 | 47 | 46 | 45 | 44 | 43 | 42 | 41 | 40 | 39 | 38 | 37 | 36 | 35 | 34 | 33 | 32 |
RES0 | |||||||||||||||||||||||||||||||
ContextID | |||||||||||||||||||||||||||||||
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 |
Reserved, RES0.
Context ID value for comparison.
The value is compared against CONTEXTIDR_EL2 when (FEAT_VHE is implemented or FEAT_Debugv8p2 is implemented), HCR_EL2.E2H is 1, and either:
Otherwise, the value is compared against CONTEXTIDR_EL1.
On a Cold reset, this field resets to an architecturally UNKNOWN value.
63 | 62 | 61 | 60 | 59 | 58 | 57 | 56 | 55 | 54 | 53 | 52 | 51 | 50 | 49 | 48 | 47 | 46 | 45 | 44 | 43 | 42 | 41 | 40 | 39 | 38 | 37 | 36 | 35 | 34 | 33 | 32 |
RES0 | |||||||||||||||||||||||||||||||
ContextID | |||||||||||||||||||||||||||||||
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 |
Reserved, RES0.
Context ID value for comparison against CONTEXTIDR_EL1.
On a Cold reset, this field resets to an architecturally UNKNOWN value.
63 | 62 | 61 | 60 | 59 | 58 | 57 | 56 | 55 | 54 | 53 | 52 | 51 | 50 | 49 | 48 | 47 | 46 | 45 | 44 | 43 | 42 | 41 | 40 | 39 | 38 | 37 | 36 | 35 | 34 | 33 | 32 |
RES0 | VMID[15:8] | VMID[7:0] | |||||||||||||||||||||||||||||
RES0 | |||||||||||||||||||||||||||||||
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 |
Reserved, RES0.
Extension to VMID[7:0]. See DBGBVR<n>_EL1.VMID[7:0] for more details.
On a Cold reset, this field resets to an architecturally UNKNOWN value.
Reserved, RES0.
VMID value for comparison.
The VMID is 8 bits when any of the following are true:
On a Cold reset, this field resets to an architecturally UNKNOWN value.
Reserved, RES0.
63 | 62 | 61 | 60 | 59 | 58 | 57 | 56 | 55 | 54 | 53 | 52 | 51 | 50 | 49 | 48 | 47 | 46 | 45 | 44 | 43 | 42 | 41 | 40 | 39 | 38 | 37 | 36 | 35 | 34 | 33 | 32 |
RES0 | VMID[15:8] | VMID[7:0] | |||||||||||||||||||||||||||||
ContextID | |||||||||||||||||||||||||||||||
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 |
Reserved, RES0.
Extension to VMID[7:0]. See DBGBVR<n>_EL1.VMID[7:0] for more details.
On a Cold reset, this field resets to an architecturally UNKNOWN value.
Reserved, RES0.
VMID value for comparison.
The VMID is 8 bits when any of the following are true:
On a Cold reset, this field resets to an architecturally UNKNOWN value.
Context ID value for comparison against CONTEXTIDR_EL1.
On a Cold reset, this field resets to an architecturally UNKNOWN value.
63 | 62 | 61 | 60 | 59 | 58 | 57 | 56 | 55 | 54 | 53 | 52 | 51 | 50 | 49 | 48 | 47 | 46 | 45 | 44 | 43 | 42 | 41 | 40 | 39 | 38 | 37 | 36 | 35 | 34 | 33 | 32 |
ContextID2 | |||||||||||||||||||||||||||||||
RES0 | |||||||||||||||||||||||||||||||
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 |
Context ID value for comparison against CONTEXTIDR_EL2.
On a Cold reset, this field resets to an architecturally UNKNOWN value.
Reserved, RES0.
63 | 62 | 61 | 60 | 59 | 58 | 57 | 56 | 55 | 54 | 53 | 52 | 51 | 50 | 49 | 48 | 47 | 46 | 45 | 44 | 43 | 42 | 41 | 40 | 39 | 38 | 37 | 36 | 35 | 34 | 33 | 32 |
ContextID2 | |||||||||||||||||||||||||||||||
ContextID | |||||||||||||||||||||||||||||||
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 |
Context ID value for comparison against CONTEXTIDR_EL2.
On a Cold reset, this field resets to an architecturally UNKNOWN value.
Context ID value for comparison against CONTEXTIDR_EL1.
On a Cold reset, this field resets to an architecturally UNKNOWN value.
Accesses to this register use the following encodings:
op0 | op1 | CRn | CRm | op2 |
---|---|---|---|---|
0b10 | 0b000 | 0b0000 | n[3:0] | 0b100 |
if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if Halted() && HaveEL(EL3) && EDSCR.SDD == '1' && boolean IMPLEMENTATION_DEFINED "EL3 trap priority when SDD == '1'" && MDCR_EL3.TDA == '1' then UNDEFINED; elsif EL2Enabled() && (!HaveEL(EL3) || SCR_EL3.FGTEn == '1') && HDFGRTR_EL2.DBGBVRn_EL1 == '1' then AArch64.SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && MDCR_EL2.<TDE,TDA> != '00' then AArch64.SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && MDCR_EL3.TDA == '1' then if Halted() && EDSCR.SDD == '1' then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); elsif OSLSR_EL1.OSLK == '0' && HaltingAllowed() && EDSCR.TDA == '1' then Halt(DebugHalt_SoftwareAccess); else return DBGBVR_EL1[UInt(CRm<3:0>)]; elsif PSTATE.EL == EL2 then if Halted() && HaveEL(EL3) && EDSCR.SDD == '1' && boolean IMPLEMENTATION_DEFINED "EL3 trap priority when SDD == '1'" && MDCR_EL3.TDA == '1' then UNDEFINED; elsif HaveEL(EL3) && MDCR_EL3.TDA == '1' then if Halted() && EDSCR.SDD == '1' then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); elsif OSLSR_EL1.OSLK == '0' && HaltingAllowed() && EDSCR.TDA == '1' then Halt(DebugHalt_SoftwareAccess); else return DBGBVR_EL1[UInt(CRm<3:0>)]; elsif PSTATE.EL == EL3 then if OSLSR_EL1.OSLK == '0' && HaltingAllowed() && EDSCR.TDA == '1' then Halt(DebugHalt_SoftwareAccess); else return DBGBVR_EL1[UInt(CRm<3:0>)];
op0 | op1 | CRn | CRm | op2 |
---|---|---|---|---|
0b10 | 0b000 | 0b0000 | n[3:0] | 0b100 |
if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if Halted() && HaveEL(EL3) && EDSCR.SDD == '1' && boolean IMPLEMENTATION_DEFINED "EL3 trap priority when SDD == '1'" && MDCR_EL3.TDA == '1' then UNDEFINED; elsif EL2Enabled() && (!HaveEL(EL3) || SCR_EL3.FGTEn == '1') && HDFGWTR_EL2.DBGBVRn_EL1 == '1' then AArch64.SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && MDCR_EL2.<TDE,TDA> != '00' then AArch64.SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && MDCR_EL3.TDA == '1' then if Halted() && EDSCR.SDD == '1' then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); elsif OSLSR_EL1.OSLK == '0' && HaltingAllowed() && EDSCR.TDA == '1' then Halt(DebugHalt_SoftwareAccess); else DBGBVR_EL1[UInt(CRm<3:0>)] = X[t]; elsif PSTATE.EL == EL2 then if Halted() && HaveEL(EL3) && EDSCR.SDD == '1' && boolean IMPLEMENTATION_DEFINED "EL3 trap priority when SDD == '1'" && MDCR_EL3.TDA == '1' then UNDEFINED; elsif HaveEL(EL3) && MDCR_EL3.TDA == '1' then if Halted() && EDSCR.SDD == '1' then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); elsif OSLSR_EL1.OSLK == '0' && HaltingAllowed() && EDSCR.TDA == '1' then Halt(DebugHalt_SoftwareAccess); else DBGBVR_EL1[UInt(CRm<3:0>)] = X[t]; elsif PSTATE.EL == EL3 then if OSLSR_EL1.OSLK == '0' && HaltingAllowed() && EDSCR.TDA == '1' then Halt(DebugHalt_SoftwareAccess); else DBGBVR_EL1[UInt(CRm<3:0>)] = X[t];
30/09/2020 15:07; ccead0cb9f089f9ceec50268e82aec9e71047211
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