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UefiCpuPkg: Add CpuMmuLib to UefiCpuPkg

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Add a new base library named CpuMmuLib and add a LoongArch64 instance
with in the library.

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4734

Cc: Ray Ni <ray.ni@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Chao Li <lichao@loongson.cn>
Co-authored-by: Baoqi Zhang <zhangbaoqi@loongson.cn>
Co-authored-by: Dongyan Qian <qiandongyan@loongson.cn>
Co-authored-by: Xianglai Li <lixianglai@loongson.cn>
Co-authored-by: Bibo Mao <maobibo@loongson.cn>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Ray Ni <ray.ni@intel.com>
This commit is contained in:
Chao Li
2024-04-12 11:27:14 +08:00
committed by mergify[bot]
parent c5fb47ddab
commit 032830e968
9 changed files with 1008 additions and 0 deletions
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51
UefiCpuPkg/Library/CpuMmuLib/LoongArch64/TlbExceptionHandle.S Normal file
View File

@@ -0,0 +1,51 @@
#------------------------------------------------------------------------------
#
# TLB refill exception handler
#
# Copyright (c) 2024 Loongson Technology Corporation Limited. All rights reserved.<BR>
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
#-----------------------------------------------------------------------------
#include <Register/LoongArch64/Csr.h>
ASM_GLOBAL ASM_PFX(HandleTlbRefillStart)
ASM_GLOBAL ASM_PFX(HandleTlbRefillEnd)
#
# Refill the page table.
# @param VOID
# @retval VOID
#
ASM_PFX(HandleTlbRefillStart):
csrwr $t0, LOONGARCH_CSR_TLBRSAVE
csrrd $t0, LOONGARCH_CSR_PWCTL1
srli.d $t0, $t0, 18
andi $t0, $t0, 0x3F
bnez $t0, Level5
csrrd $t0, LOONGARCH_CSR_PWCTL1
srli.d $t0, $t0, 6
andi $t0, $t0, 0x3F
bnez $t0, Level4
csrrd $t0, LOONGARCH_CSR_PGD
b Level3
Level5:
csrrd $t0, LOONGARCH_CSR_PGD
lddir $t0, $t0, 4 #Put pud BaseAddress into T0
lddir $t0, $t0, 3 #Put pud BaseAddress into T0
b Level3
Level4:
csrrd $t0, LOONGARCH_CSR_PGD
lddir $t0, $t0, 3 #Put pud BaseAddress into T0
Level3:
lddir $t0, $t0, 2 #Put pmd BaseAddress into T0
lddir $t0, $t0, 1 #Put pte BaseAddress into T0
ldpte $t0, 0
ldpte $t0, 1
tlbfill // refill hi, lo0, lo1
csrrd $t0, LOONGARCH_CSR_TLBRSAVE
ertn
ASM_PFX(HandleTlbRefillEnd):
.end