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bd3c579848
Loongson Binary Translation (LBT) is used to accelerate binary translation, which contains 4 scratch registers (scr0 to scr3), x86/ARM eflags (eflags) and x87 fpu stack pointer (ftop). This patch support kernel to save/restore these registers, handle the LBT exception and maintain sigcontext. Signed-off-by: Qi Hu <huqi@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
73 lines
1.4 KiB
C
73 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
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/*
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* Author: Hanlu Li <lihanlu@loongson.cn>
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* Huacai Chen <chenhuacai@loongson.cn>
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*
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* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
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*/
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#ifndef _UAPI_ASM_SIGCONTEXT_H
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#define _UAPI_ASM_SIGCONTEXT_H
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#include <linux/types.h>
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#include <linux/posix_types.h>
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/* FP context was used */
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#define SC_USED_FP (1 << 0)
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/* Address error was due to memory load */
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#define SC_ADDRERR_RD (1 << 30)
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/* Address error was due to memory store */
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#define SC_ADDRERR_WR (1 << 31)
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struct sigcontext {
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__u64 sc_pc;
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__u64 sc_regs[32];
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__u32 sc_flags;
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__u64 sc_extcontext[0] __attribute__((__aligned__(16)));
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};
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#define CONTEXT_INFO_ALIGN 16
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struct sctx_info {
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__u32 magic;
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__u32 size;
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__u64 padding; /* padding to 16 bytes */
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};
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/* FPU context */
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#define FPU_CTX_MAGIC 0x46505501
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#define FPU_CTX_ALIGN 8
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struct fpu_context {
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__u64 regs[32];
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__u64 fcc;
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__u32 fcsr;
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};
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/* LSX context */
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#define LSX_CTX_MAGIC 0x53580001
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#define LSX_CTX_ALIGN 16
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struct lsx_context {
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__u64 regs[2*32];
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__u64 fcc;
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__u32 fcsr;
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};
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/* LASX context */
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#define LASX_CTX_MAGIC 0x41535801
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#define LASX_CTX_ALIGN 32
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struct lasx_context {
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__u64 regs[4*32];
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__u64 fcc;
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__u32 fcsr;
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};
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/* LBT context */
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#define LBT_CTX_MAGIC 0x42540001
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#define LBT_CTX_ALIGN 8
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struct lbt_context {
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__u64 regs[4];
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__u32 eflags;
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__u32 ftop;
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};
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#endif /* _UAPI_ASM_SIGCONTEXT_H */
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