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abda1bd5f4
Convert some of the sleep.S guts to C code, which makes it easier to use our macros and to add L2 cache handling. We provide a helper function, __cpu_suspend_save(), which deals with saving the common state, setting up for resume, and flushing caches. The remainder left as assembly code is the saving of the CPU general purpose registers, and allocating space on the stack to save the CPU specific registers and resume state. Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Tested-by: Shawn Guo <shawn.guo@linaro.org> Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
124 lines
3.0 KiB
C
124 lines
3.0 KiB
C
/*
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* arch/arm/include/asm/proc-fns.h
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*
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* Copyright (C) 1997-1999 Russell King
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* Copyright (C) 2000 Deep Blue Solutions Ltd
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __ASM_PROCFNS_H
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#define __ASM_PROCFNS_H
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#ifdef __KERNEL__
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#include <asm/glue-proc.h>
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#include <asm/page.h>
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#ifndef __ASSEMBLY__
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struct mm_struct;
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/*
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* Don't change this structure - ASM code relies on it.
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*/
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extern struct processor {
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/* MISC
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* get data abort address/flags
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*/
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void (*_data_abort)(unsigned long pc);
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/*
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* Retrieve prefetch fault address
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*/
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unsigned long (*_prefetch_abort)(unsigned long lr);
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/*
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* Set up any processor specifics
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*/
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void (*_proc_init)(void);
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/*
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* Disable any processor specifics
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*/
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void (*_proc_fin)(void);
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/*
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* Special stuff for a reset
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*/
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void (*reset)(unsigned long addr) __attribute__((noreturn));
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/*
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* Idle the processor
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*/
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int (*_do_idle)(void);
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/*
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* Processor architecture specific
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*/
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/*
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* clean a virtual address range from the
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* D-cache without flushing the cache.
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*/
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void (*dcache_clean_area)(void *addr, int size);
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/*
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* Set the page table
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*/
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void (*switch_mm)(unsigned long pgd_phys, struct mm_struct *mm);
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/*
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* Set a possibly extended PTE. Non-extended PTEs should
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* ignore 'ext'.
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*/
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void (*set_pte_ext)(pte_t *ptep, pte_t pte, unsigned int ext);
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/* Suspend/resume */
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unsigned int suspend_size;
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void (*do_suspend)(void *);
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void (*do_resume)(void *);
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} processor;
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#ifndef MULTI_CPU
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extern void cpu_proc_init(void);
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extern void cpu_proc_fin(void);
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extern int cpu_do_idle(void);
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extern void cpu_dcache_clean_area(void *, int);
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extern void cpu_do_switch_mm(unsigned long pgd_phys, struct mm_struct *mm);
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extern void cpu_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
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extern void cpu_reset(unsigned long addr) __attribute__((noreturn));
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/* These three are private to arch/arm/kernel/suspend.c */
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extern void cpu_do_suspend(void *);
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extern void cpu_do_resume(void *);
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#else
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#define cpu_proc_init processor._proc_init
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#define cpu_proc_fin processor._proc_fin
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#define cpu_reset processor.reset
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#define cpu_do_idle processor._do_idle
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#define cpu_dcache_clean_area processor.dcache_clean_area
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#define cpu_set_pte_ext processor.set_pte_ext
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#define cpu_do_switch_mm processor.switch_mm
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/* These three are private to arch/arm/kernel/suspend.c */
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#define cpu_do_suspend processor.do_suspend
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#define cpu_do_resume processor.do_resume
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#endif
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extern void cpu_resume(void);
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#include <asm/memory.h>
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#ifdef CONFIG_MMU
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#define cpu_switch_mm(pgd,mm) cpu_do_switch_mm(virt_to_phys(pgd),mm)
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#define cpu_get_pgd() \
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({ \
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unsigned long pg; \
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__asm__("mrc p15, 0, %0, c2, c0, 0" \
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: "=r" (pg) : : "cc"); \
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pg &= ~0x3fff; \
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(pgd_t *)phys_to_virt(pg); \
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})
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* __KERNEL__ */
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#endif /* __ASM_PROCFNS_H */
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