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android_kernel_xiaomi_sm8350/arch/csky/abiv1/inc/abi/entry.h

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csky: Exception handling and mm-fault This patch adds exception handling code, cpuinfo and mm-fault code. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
2018-09-05 02:25:08 -04:00
/* SPDX-License-Identifier: GPL-2.0 */
// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
#ifndef __ASM_CSKY_ENTRY_H
#define __ASM_CSKY_ENTRY_H
#include <asm/setup.h>
#include <abi/regdef.h>
#define LSAVE_PC 8
#define LSAVE_PSR 12
#define LSAVE_A0 24
#define LSAVE_A1 28
#define LSAVE_A2 32
#define LSAVE_A3 36
#define LSAVE_A4 40
#define LSAVE_A5 44
csky: Set regs->usp to kernel sp, when the exception is from kernel [ Upstream commit f8e17c17b81070f38062dce79ca7f4541851dadd ] In the past, we didn't care about kernel sp when saving pt_reg. But in some cases, we still need pt_reg->usp to represent the kernel stack before enter exception. For cmpxhg in atomic.S, we need save and restore usp for above. Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-12-16 22:12:55 -05:00
#define usp ss1
csky: Exception handling and mm-fault This patch adds exception handling code, cpuinfo and mm-fault code. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
2018-09-05 02:25:08 -04:00
.macro USPTOKSP
csky: Set regs->usp to kernel sp, when the exception is from kernel [ Upstream commit f8e17c17b81070f38062dce79ca7f4541851dadd ] In the past, we didn't care about kernel sp when saving pt_reg. But in some cases, we still need pt_reg->usp to represent the kernel stack before enter exception. For cmpxhg in atomic.S, we need save and restore usp for above. Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-12-16 22:12:55 -05:00
mtcr sp, usp
csky: Exception handling and mm-fault This patch adds exception handling code, cpuinfo and mm-fault code. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
2018-09-05 02:25:08 -04:00
mfcr sp, ss0
.endm
.macro KSPTOUSP
mtcr sp, ss0
csky: Set regs->usp to kernel sp, when the exception is from kernel [ Upstream commit f8e17c17b81070f38062dce79ca7f4541851dadd ] In the past, we didn't care about kernel sp when saving pt_reg. But in some cases, we still need pt_reg->usp to represent the kernel stack before enter exception. For cmpxhg in atomic.S, we need save and restore usp for above. Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-12-16 22:12:55 -05:00
mfcr sp, usp
csky: Exception handling and mm-fault This patch adds exception handling code, cpuinfo and mm-fault code. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
2018-09-05 02:25:08 -04:00
.endm
.macro SAVE_ALL epc_inc
mtcr r13, ss2
mfcr r13, epsr
btsti r13, 31
bt 1f
USPTOKSP
1:
subi sp, 32
subi sp, 32
subi sp, 16
stw r13, (sp, 12)
stw lr, (sp, 4)
mfcr lr, epc
movi r13, \epc_inc
add lr, r13
stw lr, (sp, 8)
csky: Set regs->usp to kernel sp, when the exception is from kernel [ Upstream commit f8e17c17b81070f38062dce79ca7f4541851dadd ] In the past, we didn't care about kernel sp when saving pt_reg. But in some cases, we still need pt_reg->usp to represent the kernel stack before enter exception. For cmpxhg in atomic.S, we need save and restore usp for above. Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-12-16 22:12:55 -05:00
mov lr, sp
addi lr, 32
addi lr, 32
addi lr, 16
bt 2f
csky: Exception handling and mm-fault This patch adds exception handling code, cpuinfo and mm-fault code. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
2018-09-05 02:25:08 -04:00
mfcr lr, ss1
csky: Set regs->usp to kernel sp, when the exception is from kernel [ Upstream commit f8e17c17b81070f38062dce79ca7f4541851dadd ] In the past, we didn't care about kernel sp when saving pt_reg. But in some cases, we still need pt_reg->usp to represent the kernel stack before enter exception. For cmpxhg in atomic.S, we need save and restore usp for above. Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-12-16 22:12:55 -05:00
2:
csky: Exception handling and mm-fault This patch adds exception handling code, cpuinfo and mm-fault code. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
2018-09-05 02:25:08 -04:00
stw lr, (sp, 16)
stw a0, (sp, 20)
stw a0, (sp, 24)
stw a1, (sp, 28)
stw a2, (sp, 32)
stw a3, (sp, 36)
addi sp, 32
addi sp, 8
mfcr r13, ss2
stw r6, (sp)
stw r7, (sp, 4)
stw r8, (sp, 8)
stw r9, (sp, 12)
stw r10, (sp, 16)
stw r11, (sp, 20)
stw r12, (sp, 24)
stw r13, (sp, 28)
stw r14, (sp, 32)
stw r1, (sp, 36)
subi sp, 32
subi sp, 8
.endm
.macro RESTORE_ALL
psrclr ie
ldw lr, (sp, 4)
ldw a0, (sp, 8)
mtcr a0, epc
ldw a0, (sp, 12)
mtcr a0, epsr
btsti a0, 31
csky: Set regs->usp to kernel sp, when the exception is from kernel [ Upstream commit f8e17c17b81070f38062dce79ca7f4541851dadd ] In the past, we didn't care about kernel sp when saving pt_reg. But in some cases, we still need pt_reg->usp to represent the kernel stack before enter exception. For cmpxhg in atomic.S, we need save and restore usp for above. Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-12-16 22:12:55 -05:00
bt 1f
csky: Exception handling and mm-fault This patch adds exception handling code, cpuinfo and mm-fault code. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
2018-09-05 02:25:08 -04:00
ldw a0, (sp, 16)
mtcr a0, ss1
csky: Set regs->usp to kernel sp, when the exception is from kernel [ Upstream commit f8e17c17b81070f38062dce79ca7f4541851dadd ] In the past, we didn't care about kernel sp when saving pt_reg. But in some cases, we still need pt_reg->usp to represent the kernel stack before enter exception. For cmpxhg in atomic.S, we need save and restore usp for above. Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-12-16 22:12:55 -05:00
1:
csky: Exception handling and mm-fault This patch adds exception handling code, cpuinfo and mm-fault code. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
2018-09-05 02:25:08 -04:00
ldw a0, (sp, 24)
ldw a1, (sp, 28)
ldw a2, (sp, 32)
ldw a3, (sp, 36)
addi sp, 32
addi sp, 8
ldw r6, (sp)
ldw r7, (sp, 4)
ldw r8, (sp, 8)
ldw r9, (sp, 12)
ldw r10, (sp, 16)
ldw r11, (sp, 20)
ldw r12, (sp, 24)
ldw r13, (sp, 28)
ldw r14, (sp, 32)
ldw r1, (sp, 36)
addi sp, 32
addi sp, 8
csky: Set regs->usp to kernel sp, when the exception is from kernel [ Upstream commit f8e17c17b81070f38062dce79ca7f4541851dadd ] In the past, we didn't care about kernel sp when saving pt_reg. But in some cases, we still need pt_reg->usp to represent the kernel stack before enter exception. For cmpxhg in atomic.S, we need save and restore usp for above. Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-12-16 22:12:55 -05:00
bt 2f
csky: Exception handling and mm-fault This patch adds exception handling code, cpuinfo and mm-fault code. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
2018-09-05 02:25:08 -04:00
KSPTOUSP
csky: Set regs->usp to kernel sp, when the exception is from kernel [ Upstream commit f8e17c17b81070f38062dce79ca7f4541851dadd ] In the past, we didn't care about kernel sp when saving pt_reg. But in some cases, we still need pt_reg->usp to represent the kernel stack before enter exception. For cmpxhg in atomic.S, we need save and restore usp for above. Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-12-16 22:12:55 -05:00
2:
csky: Exception handling and mm-fault This patch adds exception handling code, cpuinfo and mm-fault code. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
2018-09-05 02:25:08 -04:00
rte
.endm
.macro SAVE_SWITCH_STACK
subi sp, 32
stm r8-r15, (sp)
.endm
.macro RESTORE_SWITCH_STACK
ldm r8-r15, (sp)
addi sp, 32
.endm
/* MMU registers operators. */
.macro RD_MIR rx
cprcr \rx, cpcr0
.endm
.macro RD_MEH rx
cprcr \rx, cpcr4
.endm
.macro RD_MCIR rx
cprcr \rx, cpcr8
.endm
.macro RD_PGDR rx
cprcr \rx, cpcr29
.endm
.macro WR_MEH rx
cpwcr \rx, cpcr4
.endm
.macro WR_MCIR rx
cpwcr \rx, cpcr8
.endm
csky: Support vmlinux bootup with MMU off Modify SETUP_MMU macro to fit on both MMU-on or MMU-off enviornment and vmlinux could bootup from MMU off enviornment for some cases. Unify the style of _start and _start_smp_secondary in head.S to make head.S looks more concise and easy to understand. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Cc: Arnd Bergmann <arnd@arndb.de>
2019-04-12 07:08:34 -04:00
.macro SETUP_MMU
/* Init psr and enable ee */
lrw r6, DEFAULT_PSR_VALUE
mtcr r6, psr
psrset ee
csky: Support dynamic start physical address Before this patch csky-linux need CONFIG_RAM_BASE to determine start physical address. Now we use phys_offset variable to replace the macro of PHYS_OFFSET and we setup phys_offset with real physical address which is determined during startup in head.S. With this patch we needn't re-compile kernel for different start physical address. ie: 0x0 / 0xc0000000 start physical address could use the same vmlinux, be care different start address must be 512MB aligned. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Cc: Arnd Bergmann <arnd@arndb.de>
2019-04-07 23:12:25 -04:00
/* Select MMU as co-processor */
cpseti cp15
/*
* cpcr30 format:
* 31 - 29 | 28 - 4 | 3 | 2 | 1 | 0
* BA Reserved C D V
*/
csky: Support vmlinux bootup with MMU off Modify SETUP_MMU macro to fit on both MMU-on or MMU-off enviornment and vmlinux could bootup from MMU off enviornment for some cases. Unify the style of _start and _start_smp_secondary in head.S to make head.S looks more concise and easy to understand. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Cc: Arnd Bergmann <arnd@arndb.de>
2019-04-12 07:08:34 -04:00
cprcr r6, cpcr30
csky: Fixup msa highest 3 bits mask [ Upstream commit 165f2d2858013253042809df082b8df7e34e86d7 ] Just as comment mentioned, the msa format: cr<30/31, 15> MSA register format: 31 - 29 | 28 - 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 BA Reserved SH WA B SO SEC C D V So we should shift 29 bits not 28 bits for mask Signed-off-by: Liu Yibin <jiulong@linux.alibaba.com> Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-04-21 03:56:28 -04:00
lsri r6, 29
lsli r6, 29
csky: Support vmlinux bootup with MMU off Modify SETUP_MMU macro to fit on both MMU-on or MMU-off enviornment and vmlinux could bootup from MMU off enviornment for some cases. Unify the style of _start and _start_smp_secondary in head.S to make head.S looks more concise and easy to understand. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Cc: Arnd Bergmann <arnd@arndb.de>
2019-04-12 07:08:34 -04:00
addi r6, 0xe
cpwcr r6, cpcr30
csky: Fixup cpu speculative execution to IO area [ Upstream commit aefd9461d34a1b0a2acad0750c43216c1c27b9d4 ] For the memory size ( > 512MB, < 1GB), the MSA setting is: - SSEG0: PHY_START , PHY_START + 512MB - SSEG1: PHY_START + 512MB, PHY_START + 1GB But the real memory is no more than 1GB, there is a gap between the end size of memory and border of 1GB. CPU could speculatively execute to that gap and if the gap of the bus couldn't respond to the CPU request, then the crash will happen. Now make the setting with: - SSEG0: PHY_START , PHY_START + 512MB (no change) - SSEG1: Disabled (We use highmem to use the memory of 512MB~1GB) We also deprecated zhole_szie[] settings, it's only used by arm style CPUs. All memory gap should use Reserved setting of dts in csky system. Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-03-28 07:14:37 -04:00
movi r6, 0
csky: Support vmlinux bootup with MMU off Modify SETUP_MMU macro to fit on both MMU-on or MMU-off enviornment and vmlinux could bootup from MMU off enviornment for some cases. Unify the style of _start and _start_smp_secondary in head.S to make head.S looks more concise and easy to understand. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Cc: Arnd Bergmann <arnd@arndb.de>
2019-04-12 07:08:34 -04:00
cpwcr r6, cpcr31
csky: Exception handling and mm-fault This patch adds exception handling code, cpuinfo and mm-fault code. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
2018-09-05 02:25:08 -04:00
.endm
csky: Update syscall_trace_enter/exit implementation Previous syscall_trace implementation couldn't support AUDITSYSCALL and SYSCALL_TRACEPOINTS. Now we redesign it to support audit_syscall and syscall_tracepoints just like other archs'. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Cc: Dmitry V. Levin <ldv@altlinux.org> Cc: Arnd Bergmann <arnd@arndb.de>
2019-03-20 06:27:27 -04:00
.macro ANDI_R3 rx, imm
lsri \rx, 3
andi \rx, (\imm >> 3)
.endm
csky: Exception handling and mm-fault This patch adds exception handling code, cpuinfo and mm-fault code. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
2018-09-05 02:25:08 -04:00
#endif /* __ASM_CSKY_ENTRY_H */
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