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From 65a4a80157bacde3cf86ce8cbc9a08f5f05ad9bb Mon Sep 17 00:00:00 2001
From: Weijie Gao <weijie.gao@mediatek.com>
Date: Fri, 20 May 2022 11:21:34 +0800
Subject: [PATCH 01/25] mips: add asm/mipsmtregs.h for MIPS multi-threading
To be compatible with old u-boot used by lots of MT7621 devices, the u-boot
needs to boot-up MT7621's all cores, and all VPES of each core.
This patch adds asm/mipsmtregs.h from linux kernel which is need for
boot-up VPEs.
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
---
arch/mips/include/asm/mipsmtregs.h | 142 +++++++++++++++++++++++++++++
1 file changed, 142 insertions(+)
create mode 100644 arch/mips/include/asm/mipsmtregs.h
--- /dev/null
+++ b/arch/mips/include/asm/mipsmtregs.h
@@ -0,0 +1,142 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * MT regs definitions, follows on from mipsregs.h
+ * Copyright (C) 2004 - 2005 MIPS Technologies, Inc. All rights reserved.
+ * Elizabeth Clarke et. al.
+ *
+ */
+#ifndef _ASM_MIPSMTREGS_H
+#define _ASM_MIPSMTREGS_H
+
+#include <asm/mipsregs.h>
+
+/*
+ * Macros for use in assembly language code
+ */
+
+#define CP0_MVPCONTROL $0, 1
+#define CP0_MVPCONF0 $0, 2
+#define CP0_MVPCONF1 $0, 3
+#define CP0_VPECONTROL $1, 1
+#define CP0_VPECONF0 $1, 2
+#define CP0_VPECONF1 $1, 3
+#define CP0_YQMASK $1, 4
+#define CP0_VPESCHEDULE $1, 5
+#define CP0_VPESCHEFBK $1, 6
+#define CP0_TCSTATUS $2, 1
+#define CP0_TCBIND $2, 2
+#define CP0_TCRESTART $2, 3
+#define CP0_TCHALT $2, 4
+#define CP0_TCCONTEXT $2, 5
+#define CP0_TCSCHEDULE $2, 6
+#define CP0_TCSCHEFBK $2, 7
+#define CP0_SRSCONF0 $6, 1
+#define CP0_SRSCONF1 $6, 2
+#define CP0_SRSCONF2 $6, 3
+#define CP0_SRSCONF3 $6, 4
+#define CP0_SRSCONF4 $6, 5
+
+/* MVPControl fields */
+#define MVPCONTROL_EVP (_ULCAST_(1))
+
+#define MVPCONTROL_VPC_SHIFT 1
+#define MVPCONTROL_VPC (_ULCAST_(1) << MVPCONTROL_VPC_SHIFT)
+
+#define MVPCONTROL_STLB_SHIFT 2
+#define MVPCONTROL_STLB (_ULCAST_(1) << MVPCONTROL_STLB_SHIFT)
+
+/* MVPConf0 fields */
+#define MVPCONF0_PTC_SHIFT 0
+#define MVPCONF0_PTC (_ULCAST_(0xff))
+#define MVPCONF0_PVPE_SHIFT 10
+#define MVPCONF0_PVPE (_ULCAST_(0xf) << MVPCONF0_PVPE_SHIFT)
+#define MVPCONF0_TCA_SHIFT 15
+#define MVPCONF0_TCA (_ULCAST_(1) << MVPCONF0_TCA_SHIFT)
+#define MVPCONF0_PTLBE_SHIFT 16
+#define MVPCONF0_PTLBE (_ULCAST_(0x3ff) << MVPCONF0_PTLBE_SHIFT)
+#define MVPCONF0_TLBS_SHIFT 29
+#define MVPCONF0_TLBS (_ULCAST_(1) << MVPCONF0_TLBS_SHIFT)
+#define MVPCONF0_M_SHIFT 31
+#define MVPCONF0_M (_ULCAST_(0x1) << MVPCONF0_M_SHIFT)
+
+/* config3 fields */
+#define CONFIG3_MT_SHIFT 2
+#define CONFIG3_MT (_ULCAST_(1) << CONFIG3_MT_SHIFT)
+
+/* VPEControl fields (per VPE) */
+#define VPECONTROL_TARGTC (_ULCAST_(0xff))
+
+#define VPECONTROL_TE_SHIFT 15
+#define VPECONTROL_TE (_ULCAST_(1) << VPECONTROL_TE_SHIFT)
+#define VPECONTROL_EXCPT_SHIFT 16
+#define VPECONTROL_EXCPT (_ULCAST_(0x7) << VPECONTROL_EXCPT_SHIFT)
+
+/* Thread Exception Codes for EXCPT field */
+#define THREX_TU 0
+#define THREX_TO 1
+#define THREX_IYQ 2
+#define THREX_GSX 3
+#define THREX_YSCH 4
+#define THREX_GSSCH 5
+
+#define VPECONTROL_GSI_SHIFT 20
+#define VPECONTROL_GSI (_ULCAST_(1) << VPECONTROL_GSI_SHIFT)
+#define VPECONTROL_YSI_SHIFT 21
+#define VPECONTROL_YSI (_ULCAST_(1) << VPECONTROL_YSI_SHIFT)
+
+/* VPEConf0 fields (per VPE) */
+#define VPECONF0_VPA_SHIFT 0
+#define VPECONF0_VPA (_ULCAST_(1) << VPECONF0_VPA_SHIFT)
+#define VPECONF0_MVP_SHIFT 1
+#define VPECONF0_MVP (_ULCAST_(1) << VPECONF0_MVP_SHIFT)
+#define VPECONF0_XTC_SHIFT 21
+#define VPECONF0_XTC (_ULCAST_(0xff) << VPECONF0_XTC_SHIFT)
+
+/* VPEConf1 fields (per VPE) */
+#define VPECONF1_NCP1_SHIFT 0
+#define VPECONF1_NCP1 (_ULCAST_(0xff) << VPECONF1_NCP1_SHIFT)
+#define VPECONF1_NCP2_SHIFT 10
+#define VPECONF1_NCP2 (_ULCAST_(0xff) << VPECONF1_NCP2_SHIFT)
+#define VPECONF1_NCX_SHIFT 20
+#define VPECONF1_NCX (_ULCAST_(0xff) << VPECONF1_NCX_SHIFT)
+
+/* TCStatus fields (per TC) */
+#define TCSTATUS_TASID (_ULCAST_(0xff))
+#define TCSTATUS_IXMT_SHIFT 10
+#define TCSTATUS_IXMT (_ULCAST_(1) << TCSTATUS_IXMT_SHIFT)
+#define TCSTATUS_TKSU_SHIFT 11
+#define TCSTATUS_TKSU (_ULCAST_(3) << TCSTATUS_TKSU_SHIFT)
+#define TCSTATUS_A_SHIFT 13
+#define TCSTATUS_A (_ULCAST_(1) << TCSTATUS_A_SHIFT)
+#define TCSTATUS_DA_SHIFT 15
+#define TCSTATUS_DA (_ULCAST_(1) << TCSTATUS_DA_SHIFT)
+#define TCSTATUS_DT_SHIFT 20
+#define TCSTATUS_DT (_ULCAST_(1) << TCSTATUS_DT_SHIFT)
+#define TCSTATUS_TDS_SHIFT 21
+#define TCSTATUS_TDS (_ULCAST_(1) << TCSTATUS_TDS_SHIFT)
+#define TCSTATUS_TSST_SHIFT 22
+#define TCSTATUS_TSST (_ULCAST_(1) << TCSTATUS_TSST_SHIFT)
+#define TCSTATUS_RNST_SHIFT 23
+#define TCSTATUS_RNST (_ULCAST_(3) << TCSTATUS_RNST_SHIFT)
+/* Codes for RNST */
+#define TC_RUNNING 0
+#define TC_WAITING 1
+#define TC_YIELDING 2
+#define TC_GATED 3
+
+#define TCSTATUS_TMX_SHIFT 27
+#define TCSTATUS_TMX (_ULCAST_(1) << TCSTATUS_TMX_SHIFT)
+/* TCStatus TCU bits can use same definitions/offsets as CU bits in Status */
+
+/* TCBind */
+#define TCBIND_CURVPE_SHIFT 0
+#define TCBIND_CURVPE (_ULCAST_(0xf))
+
+#define TCBIND_CURTC_SHIFT 21
+
+#define TCBIND_CURTC (_ULCAST_(0xff) << TCBIND_CURTC_SHIFT)
+
+/* TCHalt */
+#define TCHALT_H (_ULCAST_(1))
+
+#endif
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