4f810186ab
1. update cv182x/cv183x configuration file 2. update cv181x/cv180x configuration file 3. update clk driver for cvitek 4. update dma driver for cvitek 5. update soc driver for cvitek 6. porting cvitek ion driver from kernel-4.19 7. compatible with riscv Change-Id: Icff9fafe0ebe7d6bab824bbadb952e08bdc66c19
127 lines
3.0 KiB
C
127 lines
3.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2012 Regents of the University of California
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*/
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#ifndef _ASM_RISCV_SWITCH_TO_H
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#define _ASM_RISCV_SWITCH_TO_H
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#include <linux/sched/task_stack.h>
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#include <asm/processor.h>
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#include <asm/ptrace.h>
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#include <asm/csr.h>
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#ifdef CONFIG_FPU
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extern void __fstate_save(struct task_struct *save_to);
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extern void __fstate_restore(struct task_struct *restore_from);
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static inline void __fstate_clean(struct pt_regs *regs)
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{
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regs->status = (regs->status & ~SR_FS) | SR_FS_CLEAN;
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}
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static inline void fstate_off(struct task_struct *task,
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struct pt_regs *regs)
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{
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regs->status = (regs->status & ~SR_FS) | SR_FS_OFF;
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}
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static inline void fstate_save(struct task_struct *task,
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struct pt_regs *regs)
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{
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if ((regs->status & SR_FS) == SR_FS_DIRTY) {
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__fstate_save(task);
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__fstate_clean(regs);
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}
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}
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static inline void fstate_restore(struct task_struct *task,
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struct pt_regs *regs)
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{
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if ((regs->status & SR_FS) != SR_FS_OFF) {
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__fstate_restore(task);
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__fstate_clean(regs);
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}
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}
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static inline void __switch_to_aux(struct task_struct *prev,
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struct task_struct *next)
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{
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struct pt_regs *regs;
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regs = task_pt_regs(prev);
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if (unlikely(regs->status & SR_SD))
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fstate_save(prev, regs);
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fstate_restore(next, task_pt_regs(next));
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}
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extern bool has_fpu;
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#else
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#define has_fpu false
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#define fstate_save(task, regs) do { } while (0)
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#define fstate_restore(task, regs) do { } while (0)
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#define __switch_to_aux(__prev, __next) do { } while (0)
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#endif
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#ifdef CONFIG_VECTOR
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extern void __vstate_save(struct task_struct *save_to);
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extern void __vstate_restore(struct task_struct *restore_from);
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static inline void __vstate_clean(struct pt_regs *regs)
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{
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regs->status |= (regs->status & ~(SR_VS)) | SR_VS_CLEAN;
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}
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static inline void vstate_save(struct task_struct *task,
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struct pt_regs *regs)
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{
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if ((regs->status & SR_VS) == SR_VS_DIRTY) {
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__vstate_save(task);
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__vstate_clean(regs);
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}
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}
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static inline void vstate_restore(struct task_struct *task,
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struct pt_regs *regs)
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{
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if ((regs->status & SR_VS) != SR_VS_OFF) {
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__vstate_restore(task);
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__vstate_clean(regs);
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}
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}
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static inline void __switch_to_vector(struct task_struct *prev,
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struct task_struct *next)
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{
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struct pt_regs *regs;
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regs = task_pt_regs(prev);
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if (unlikely(regs->status & SR_SD))
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vstate_save(prev, regs);
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vstate_restore(next, task_pt_regs(next));
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}
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extern bool has_vector;
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#else
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#define has_vector false
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#define vstate_save(task, regs) do { } while (0)
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#define vstate_restore(task, regs) do { } while (0)
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#define __switch_to_vector(__prev, __next) do { } while (0)
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#endif
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extern struct task_struct *__switch_to(struct task_struct *,
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struct task_struct *);
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#define switch_to(prev, next, last) \
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do { \
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struct task_struct *__prev = (prev); \
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struct task_struct *__next = (next); \
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if (has_fpu) \
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__switch_to_aux(__prev, __next); \
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if (has_vector) \
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__switch_to_vector(__prev, __next); \
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((last) = __switch_to(__prev, __next)); \
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} while (0)
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#endif /* _ASM_RISCV_SWITCH_TO_H */
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