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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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179e949719
While the GCC and Clang compilers already define __ASSEMBLER__ automatically when compiling assembly code, __ASSEMBLY__ is a macro that only gets defined by the Makefiles in the kernel. This can be very confusing when switching between userspace and kernelspace coding, or when dealing with uapi headers that rather should use __ASSEMBLER__ instead. So let's standardize on the __ASSEMBLER__ macro that is provided by the compilers now. This is a completely mechanical patch (done with a simple "sed -i" statement). Cc: linux-snps-arc@lists.infradead.org Signed-off-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Vineet Gupta <vgupta@kernel.org>
153 lines
3.8 KiB
C
153 lines
3.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2020 Synopsys, Inc. (www.synopsys.com)
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*
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* Author: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
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*/
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#ifndef __ASM_ARC_DSP_IMPL_H
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#define __ASM_ARC_DSP_IMPL_H
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#include <asm/dsp.h>
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#define DSP_CTRL_DISABLED_ALL 0
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#ifdef __ASSEMBLER__
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/* clobbers r5 register */
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.macro DSP_EARLY_INIT
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#ifdef CONFIG_ISA_ARCV2
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lr r5, [ARC_AUX_DSP_BUILD]
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bmsk r5, r5, 7
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breq r5, 0, 1f
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mov r5, DSP_CTRL_DISABLED_ALL
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sr r5, [ARC_AUX_DSP_CTRL]
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1:
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#endif
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.endm
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/* clobbers r10, r11 registers pair */
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.macro DSP_SAVE_REGFILE_IRQ
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#if defined(CONFIG_ARC_DSP_KERNEL)
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/*
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* Drop any changes to DSP_CTRL made by userspace so userspace won't be
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* able to break kernel - reset it to DSP_CTRL_DISABLED_ALL value
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*/
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mov r10, DSP_CTRL_DISABLED_ALL
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sr r10, [ARC_AUX_DSP_CTRL]
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#elif defined(CONFIG_ARC_DSP_SAVE_RESTORE_REGS)
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/*
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* Save DSP_CTRL register and reset it to value suitable for kernel
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* (DSP_CTRL_DISABLED_ALL)
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*/
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mov r10, DSP_CTRL_DISABLED_ALL
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aex r10, [ARC_AUX_DSP_CTRL]
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st r10, [sp, PT_DSP_CTRL]
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#endif
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.endm
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/* clobbers r10, r11 registers pair */
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.macro DSP_RESTORE_REGFILE_IRQ
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#if defined(CONFIG_ARC_DSP_SAVE_RESTORE_REGS)
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ld r10, [sp, PT_DSP_CTRL]
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sr r10, [ARC_AUX_DSP_CTRL]
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#endif
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.endm
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#else /* __ASEMBLY__ */
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#include <linux/sched.h>
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#include <asm/asserts.h>
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#include <asm/switch_to.h>
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#ifdef CONFIG_ARC_DSP_SAVE_RESTORE_REGS
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/*
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* As we save new and restore old AUX register value in the same place we
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* can optimize a bit and use AEX instruction (swap contents of an auxiliary
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* register with a core register) instead of LR + SR pair.
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*/
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#define AUX_SAVE_RESTORE(_saveto, _readfrom, _offt, _aux) \
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do { \
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long unsigned int _scratch; \
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\
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__asm__ __volatile__( \
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"ld %0, [%2, %4] \n" \
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"aex %0, [%3] \n" \
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"st %0, [%1, %4] \n" \
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: \
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"=&r" (_scratch) /* must be early clobber */ \
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: \
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"r" (_saveto), \
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"r" (_readfrom), \
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"Ir" (_aux), \
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"Ir" (_offt) \
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: \
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"memory" \
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); \
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} while (0)
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#define DSP_AUX_SAVE_RESTORE(_saveto, _readfrom, _aux) \
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AUX_SAVE_RESTORE(_saveto, _readfrom, \
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offsetof(struct dsp_callee_regs, _aux), \
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ARC_AUX_##_aux)
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static inline void dsp_save_restore(struct task_struct *prev,
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struct task_struct *next)
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{
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long unsigned int *saveto = &prev->thread.dsp.ACC0_GLO;
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long unsigned int *readfrom = &next->thread.dsp.ACC0_GLO;
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DSP_AUX_SAVE_RESTORE(saveto, readfrom, ACC0_GLO);
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DSP_AUX_SAVE_RESTORE(saveto, readfrom, ACC0_GHI);
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DSP_AUX_SAVE_RESTORE(saveto, readfrom, DSP_BFLY0);
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DSP_AUX_SAVE_RESTORE(saveto, readfrom, DSP_FFT_CTRL);
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#ifdef CONFIG_ARC_DSP_AGU_USERSPACE
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DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_AP0);
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DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_AP1);
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DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_AP2);
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DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_AP3);
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DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_OS0);
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DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_OS1);
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DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_MOD0);
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DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_MOD1);
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DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_MOD2);
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DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_MOD3);
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#endif /* CONFIG_ARC_DSP_AGU_USERSPACE */
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}
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#else /* !CONFIG_ARC_DSP_SAVE_RESTORE_REGS */
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#define dsp_save_restore(p, n)
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#endif /* CONFIG_ARC_DSP_SAVE_RESTORE_REGS */
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static inline bool dsp_exist(void)
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{
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struct bcr_generic bcr;
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READ_BCR(ARC_AUX_DSP_BUILD, bcr);
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return !!bcr.ver;
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}
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static inline bool agu_exist(void)
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{
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struct bcr_generic bcr;
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READ_BCR(ARC_AUX_AGU_BUILD, bcr);
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return !!bcr.ver;
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}
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static inline void dsp_config_check(void)
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{
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CHK_OPT_STRICT(CONFIG_ARC_DSP_HANDLED, dsp_exist());
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CHK_OPT_WEAK(CONFIG_ARC_DSP_AGU_USERSPACE, agu_exist());
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}
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#endif /* __ASEMBLY__ */
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#endif /* __ASM_ARC_DSP_IMPL_H */
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