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| author | Dongyan Qian <qiandongyan@loongson.cn> | 2026-10-20 13:39:34 +0300 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2026-10-24 20:15:38 +0300 |
| commit | 0a503bc2f5bd37c7a5d39d0ba31008f446f0298d (patch) | |
| tree | 22067de8bdc99bbe4704c2fe9431b7a7325f1d78 /MdePkg/Library/BaseLib/LoongArch64 | |
| parent | 02c1141a0e5b5c958630e81ac6ebb4b03c1e836f (diff) | |
| download | edk2-master.tar.xz | |
Add CsrRead(), CsrWrite() and CsrXChg() support for IMPCTL1 (0x80),
IMPCTL2 (0x81) and TLBRPRMD (0x8F). These selectors currently reach
the unsupported-selector trap instead of a CSR instruction.
Define the register numbers, add the IMPCTL1/2 dispatch range and
extend the existing TLB refill range and instruction tables through
TLBRPRMD. Preserve the existing handling of all other selectors.
The register definitions follow LoongArch Reference Manual Volume 1,
version 1.10, sections 7.4.18, 7.4.19 and 7.5.17. IMPCTL field semantics
remain implementation-specific; this change only enables CSR access.
Link: https://loongson.github.io/LoongArch-Documentation/LoongArch-Vol1-EN.html
Signed-off-by: Dongyan Qian <qiandongyan@loongson.cn>
Diffstat (limited to 'MdePkg/Library/BaseLib/LoongArch64')
| -rw-r--r-- | MdePkg/Library/BaseLib/LoongArch64/AsmCsr.S | 72 |
1 files changed, 63 insertions, 9 deletions
diff --git a/MdePkg/Library/BaseLib/LoongArch64/AsmCsr.S b/MdePkg/Library/BaseLib/LoongArch64/AsmCsr.S index bb57924bc4..36bff1c140 100644 --- a/MdePkg/Library/BaseLib/LoongArch64/AsmCsr.S +++ b/MdePkg/Library/BaseLib/LoongArch64/AsmCsr.S @@ -73,16 +73,26 @@ StableTimerCsrRd: li.w $t0, LOONGARCH_CSR_TMID
bltu $a0, $t0, ReadSelNumErr
li.w $t0, LOONGARCH_CSR_TINTCLR
- bltu $t0, $a0, TlbRefillCsrRd
+ bltu $t0, $a0, ImplCsrRd
la.pcrel $t0, StableTimerCsrRead
addi.w $t1, $a0, -LOONGARCH_CSR_TMID
alsl.d $t0, $t1, $t0, 3
jirl $zero, $t0, 0
+ImplCsrRd:
+ li.w $t0, LOONGARCH_CSR_IMPCTL1
+ bltu $a0, $t0, ReadSelNumErr
+ li.w $t0, LOONGARCH_CSR_IMPCTL2
+ bltu $t0, $a0, TlbRefillCsrRd
+ la.pcrel $t0, ImplCsrRead
+ addi.w $t1, $a0, -LOONGARCH_CSR_IMPCTL1
+ alsl.d $t0, $t1, $t0, 3
+ jirl $zero, $t0, 0
+
TlbRefillCsrRd:
li.w $t0, LOONGARCH_CSR_TLBREBASE
bltu $a0, $t0, ReadSelNumErr
- li.w $t0, LOONGARCH_CSR_TLBREHI
+ li.w $t0, LOONGARCH_CSR_TLBRPRMD
bltu $t0, $a0, DirMapCsrRd
la.pcrel $t0, TlbRefillCsrRead
addi.w $t1, $a0, -LOONGARCH_CSR_TLBREBASE
@@ -137,9 +147,16 @@ StableTimerCsrRead: CsrSel = CsrSel + 1
.endr
+ImplCsrRead:
+ CsrSel = LOONGARCH_CSR_IMPCTL1
+ .rept LOONGARCH_CSR_IMPCTL2 - LOONGARCH_CSR_IMPCTL1 + 1
+ AsmCsrRd CsrSel
+ CsrSel = CsrSel + 1
+ .endr
+
TlbRefillCsrRead:
CsrSel = LOONGARCH_CSR_TLBREBASE
- .rept LOONGARCH_CSR_TLBREHI - LOONGARCH_CSR_TLBREBASE + 1
+ .rept LOONGARCH_CSR_TLBRPRMD - LOONGARCH_CSR_TLBREBASE + 1
AsmCsrRd CsrSel
CsrSel = CsrSel + 1
.endr
@@ -199,17 +216,28 @@ StableTimerCsrWr: li.w $t0, LOONGARCH_CSR_TMID
bltu $a0, $t0, WriteSelNumErr
li.w $t0, LOONGARCH_CSR_TINTCLR
- bltu $t0, $a0, TlbRefillCsrWr
+ bltu $t0, $a0, ImplCsrWr
la.pcrel $t0, StableTimerCsrWrite
addi.w $t1, $a0, -LOONGARCH_CSR_TMID
alsl.d $t0, $t1, $t0, 3
move $a0, $a1
jirl $zero, $t0, 0
+ImplCsrWr:
+ li.w $t0, LOONGARCH_CSR_IMPCTL1
+ bltu $a0, $t0, WriteSelNumErr
+ li.w $t0, LOONGARCH_CSR_IMPCTL2
+ bltu $t0, $a0, TlbRefillCsrWr
+ la.pcrel $t0, ImplCsrWrite
+ addi.w $t1, $a0, -LOONGARCH_CSR_IMPCTL1
+ alsl.d $t0, $t1, $t0, 3
+ move $a0, $a1
+ jirl $zero, $t0, 0
+
TlbRefillCsrWr:
li.w $t0, LOONGARCH_CSR_TLBREBASE
bltu $a0, $t0, WriteSelNumErr
- li.w $t0, LOONGARCH_CSR_TLBREHI
+ li.w $t0, LOONGARCH_CSR_TLBRPRMD
bltu $t0, $a0, DirMapCsrWr
la.pcrel $t0, TlbRefillCsrWrite
addi.w $t1, $a0, -LOONGARCH_CSR_TLBREBASE
@@ -266,9 +294,16 @@ StableTimerCsrWrite: CsrSel = CsrSel + 1
.endr
+ImplCsrWrite:
+ CsrSel = LOONGARCH_CSR_IMPCTL1
+ .rept LOONGARCH_CSR_IMPCTL2 - LOONGARCH_CSR_IMPCTL1 + 1
+ AsmCsrWr CsrSel
+ CsrSel = CsrSel + 1
+ .endr
+
TlbRefillCsrWrite:
CsrSel = LOONGARCH_CSR_TLBREBASE
- .rept LOONGARCH_CSR_TLBREHI - LOONGARCH_CSR_TLBREBASE + 1
+ .rept LOONGARCH_CSR_TLBRPRMD - LOONGARCH_CSR_TLBREBASE + 1
AsmCsrWr CsrSel
CsrSel = CsrSel + 1
.endr
@@ -333,7 +368,7 @@ StableTimerCsrXchg: li.w $t0, LOONGARCH_CSR_TMID
bltu $a0, $t0, XchgSelNumErr
li.w $t0, LOONGARCH_CSR_TINTCLR
- bltu $t0, $a0, TlbRefillCsrXchg
+ bltu $t0, $a0, ImplCsrXchg
la.pcrel $t0, StableTimerCsrXchange
addi.w $t1, $a0, -LOONGARCH_CSR_TMID
alsl.d $t0, $t1, $t0, 3
@@ -341,10 +376,22 @@ StableTimerCsrXchg: move $a1, $a2
jirl $zero, $t0, 0
+ImplCsrXchg:
+ li.w $t0, LOONGARCH_CSR_IMPCTL1
+ bltu $a0, $t0, XchgSelNumErr
+ li.w $t0, LOONGARCH_CSR_IMPCTL2
+ bltu $t0, $a0, TlbRefillCsrXchg
+ la.pcrel $t0, ImplCsrXchange
+ addi.w $t1, $a0, -LOONGARCH_CSR_IMPCTL1
+ alsl.d $t0, $t1, $t0, 3
+ move $a0, $a1
+ move $a1, $a2
+ jirl $zero, $t0, 0
+
TlbRefillCsrXchg:
li.w $t0, LOONGARCH_CSR_TLBREBASE
bltu $a0, $t0, XchgSelNumErr
- li.w $t0, LOONGARCH_CSR_TLBREHI
+ li.w $t0, LOONGARCH_CSR_TLBRPRMD
bltu $t0, $a0, DirMapCsrXchg
la.pcrel $t0, TlbRefillCsrXchange
addi.w $t1, $a0, -LOONGARCH_CSR_TLBREBASE
@@ -403,9 +450,16 @@ StableTimerCsrXchange: CsrSel = CsrSel + 1
.endr
+ImplCsrXchange:
+ CsrSel = LOONGARCH_CSR_IMPCTL1
+ .rept LOONGARCH_CSR_IMPCTL2 - LOONGARCH_CSR_IMPCTL1 + 1
+ AsmCsrXChange CsrSel
+ CsrSel = CsrSel + 1
+ .endr
+
TlbRefillCsrXchange:
CsrSel = LOONGARCH_CSR_TLBREBASE
- .rept LOONGARCH_CSR_TLBREHI - LOONGARCH_CSR_TLBREBASE + 1
+ .rept LOONGARCH_CSR_TLBRPRMD - LOONGARCH_CSR_TLBREBASE + 1
AsmCsrXChange CsrSel
CsrSel = CsrSel + 1
.endr
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