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| author | Guo Ren <ren_guo@c-sky.com> | 2018-09-05 09:25:08 +0300 |
|---|---|---|
| committer | Guo Ren <ren_guo@c-sky.com> | 2018-10-25 18:36:19 +0300 |
| commit | 081860b970adb69888734df0c8aa849b00ea7254 (patch) | |
| tree | b913c3a0f6d690677ebcd10f40f02c635f4a92a9 /arch/csky/abiv2 | |
| parent | 9143a9359d051142081b26c3726c928f965c5eb7 (diff) | |
| download | linux-081860b970adb69888734df0c8aa849b00ea7254.tar.xz | |
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>
Diffstat (limited to 'arch/csky/abiv2')
| -rw-r--r-- | arch/csky/abiv2/inc/abi/entry.h | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/arch/csky/abiv2/inc/abi/entry.h b/arch/csky/abiv2/inc/abi/entry.h new file mode 100644 index 000000000000..acd05214d4e3 --- /dev/null +++ b/arch/csky/abiv2/inc/abi/entry.h @@ -0,0 +1,156 @@ +/* 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 EPC_INCREASE 4 +#define EPC_KEEP 0 + +#define KSPTOUSP +#define USPTOKSP + +#define usp cr<14, 1> + +.macro INCTRAP rx + addi \rx, EPC_INCREASE +.endm + +.macro SAVE_ALL epc_inc + subi sp, 152 + stw tls, (sp, 0) + stw lr, (sp, 4) + + mfcr lr, epc + movi tls, \epc_inc + add lr, tls + stw lr, (sp, 8) + + mfcr lr, epsr + stw lr, (sp, 12) + mfcr lr, usp + 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, 40 + stm r4-r13, (sp) + + addi sp, 40 + stm r16-r30, (sp) +#ifdef CONFIG_CPU_HAS_HILO + mfhi lr + stw lr, (sp, 60) + mflo lr + stw lr, (sp, 64) +#endif + subi sp, 80 +.endm + +.macro RESTORE_ALL + psrclr ie + ldw tls, (sp, 0) + ldw lr, (sp, 4) + ldw a0, (sp, 8) + mtcr a0, epc + ldw a0, (sp, 12) + mtcr a0, epsr + ldw a0, (sp, 16) + mtcr a0, usp + +#ifdef CONFIG_CPU_HAS_HILO + ldw a0, (sp, 140) + mthi a0 + ldw a0, (sp, 144) + mtlo a0 +#endif + + ldw a0, (sp, 24) + ldw a1, (sp, 28) + ldw a2, (sp, 32) + ldw a3, (sp, 36) + + addi sp, 40 + ldm r4-r13, (sp) + addi sp, 40 + ldm r16-r30, (sp) + addi sp, 72 + rte +.endm + +.macro SAVE_SWITCH_STACK + subi sp, 64 + stm r4-r11, (sp) + stw r15, (sp, 32) + stw r16, (sp, 36) + stw r17, (sp, 40) + stw r26, (sp, 44) + stw r27, (sp, 48) + stw r28, (sp, 52) + stw r29, (sp, 56) + stw r30, (sp, 60) +.endm + +.macro RESTORE_SWITCH_STACK + ldm r4-r11, (sp) + ldw r15, (sp, 32) + ldw r16, (sp, 36) + ldw r17, (sp, 40) + ldw r26, (sp, 44) + ldw r27, (sp, 48) + ldw r28, (sp, 52) + ldw r29, (sp, 56) + ldw r30, (sp, 60) + addi sp, 64 +.endm + +/* MMU registers operators. */ +.macro RD_MIR rx + mfcr \rx, cr<0, 15> +.endm + +.macro RD_MEH rx + mfcr \rx, cr<4, 15> +.endm + +.macro RD_MCIR rx + mfcr \rx, cr<8, 15> +.endm + +.macro RD_PGDR rx + mfcr \rx, cr<29, 15> +.endm + +.macro RD_PGDR_K rx + mfcr \rx, cr<28, 15> +.endm + +.macro WR_MEH rx + mtcr \rx, cr<4, 15> +.endm + +.macro WR_MCIR rx + mtcr \rx, cr<8, 15> +.endm + +.macro SETUP_MMU rx + lrw \rx, PHYS_OFFSET | 0xe + mtcr \rx, cr<30, 15> + lrw \rx, (PHYS_OFFSET + 0x20000000) | 0xe + mtcr \rx, cr<31, 15> +.endm +#endif /* __ASM_CSKY_ENTRY_H */ |