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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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9693a85378
This patch adds trivial support for SMARTMIPS extension. This extension is currently implemented by 4KS[CD] CPUs. Basically it saves/restores ACX register, which is part of the SMARTMIPS ASE, when needed. This patch does *not* add any support for Smartmips MMU features. Futhermore this patch does not add explicit support for 4KS[CD] CPUs since they are respectively mips32 and mips32r2 compliant. So with the current processor configuration, a platform that has such CPUs needs to select both configs: CPU_HAS_SMARTMIPS SYS_HAS_CPU_MIPS32_R[12] This is due to the processor configuration which is mixing up all the architecture variants and the processor types. The drawback of this, is that we currently pass '-march=mips32' option to gcc when building a kernel instead of '-march=4ksc' for 4KSC case. This can lead to a kernel image a little bit bigger than required. Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
101 lines
2.6 KiB
C
101 lines
2.6 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1996, 1997, 1999 by Ralf Baechle
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* Copyright (C) 1999 Silicon Graphics, Inc.
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*/
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#ifndef _ASM_SIGCONTEXT_H
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#define _ASM_SIGCONTEXT_H
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#include <asm/sgidefs.h>
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#if _MIPS_SIM == _MIPS_SIM_ABI32
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/*
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* Keep this struct definition in sync with the sigcontext fragment
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* in arch/mips/tools/offset.c
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*/
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struct sigcontext {
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unsigned int sc_regmask; /* Unused */
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unsigned int sc_status; /* Unused */
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unsigned long long sc_pc;
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unsigned long long sc_regs[32];
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unsigned long long sc_fpregs[32];
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unsigned int sc_acx; /* Was sc_ownedfp */
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unsigned int sc_fpc_csr;
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unsigned int sc_fpc_eir; /* Unused */
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unsigned int sc_used_math;
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unsigned int sc_dsp; /* dsp status, was sc_ssflags */
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unsigned long long sc_mdhi;
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unsigned long long sc_mdlo;
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unsigned long sc_hi1; /* Was sc_cause */
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unsigned long sc_lo1; /* Was sc_badvaddr */
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unsigned long sc_hi2; /* Was sc_sigset[4] */
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unsigned long sc_lo2;
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unsigned long sc_hi3;
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unsigned long sc_lo3;
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};
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#endif /* _MIPS_SIM == _MIPS_SIM_ABI32 */
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#if _MIPS_SIM == _MIPS_SIM_ABI64 || _MIPS_SIM == _MIPS_SIM_NABI32
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#include <linux/posix_types.h>
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/*
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* Keep this struct definition in sync with the sigcontext fragment
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* in arch/mips/tools/offset.c
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*
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* Warning: this structure illdefined with sc_badvaddr being just an unsigned
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* int so it was changed to unsigned long in 2.6.0-test1. This may break
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* binary compatibility - no prisoners.
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* DSP ASE in 2.6.12-rc4. Turn sc_mdhi and sc_mdlo into an array of four
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* entries, add sc_dsp and sc_reserved for padding. No prisoners.
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*/
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struct sigcontext {
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__u64 sc_regs[32];
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__u64 sc_fpregs[32];
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__u64 sc_mdhi;
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__u64 sc_hi1;
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__u64 sc_hi2;
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__u64 sc_hi3;
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__u64 sc_mdlo;
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__u64 sc_lo1;
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__u64 sc_lo2;
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__u64 sc_lo3;
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__u64 sc_pc;
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__u32 sc_fpc_csr;
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__u32 sc_used_math;
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__u32 sc_dsp;
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__u32 sc_reserved;
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};
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#ifdef __KERNEL__
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struct sigcontext32 {
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__u32 sc_regmask; /* Unused */
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__u32 sc_status; /* Unused */
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__u64 sc_pc;
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__u64 sc_regs[32];
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__u64 sc_fpregs[32];
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__u32 sc_acx; /* Only MIPS32; was sc_ownedfp */
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__u32 sc_fpc_csr;
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__u32 sc_fpc_eir; /* Unused */
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__u32 sc_used_math;
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__u32 sc_dsp; /* dsp status, was sc_ssflags */
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__u64 sc_mdhi;
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__u64 sc_mdlo;
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__u32 sc_hi1; /* Was sc_cause */
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__u32 sc_lo1; /* Was sc_badvaddr */
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__u32 sc_hi2; /* Was sc_sigset[4] */
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__u32 sc_lo2;
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__u32 sc_hi3;
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__u32 sc_lo3;
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};
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#endif /* __KERNEL__ */
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#endif /* _MIPS_SIM == _MIPS_SIM_ABI64 || _MIPS_SIM == _MIPS_SIM_NABI32 */
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#endif /* _ASM_SIGCONTEXT_H */
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