| /* |
| * arch/arm/include/asm/proc-fns.h |
| * |
| * Copyright (C) 1997-1999 Russell King |
| * Copyright (C) 2000 Deep Blue Solutions Ltd |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| #ifndef __ASM_PROCFNS_H |
| #define __ASM_PROCFNS_H |
| |
| #ifdef __KERNEL__ |
| |
| #include <asm/glue-proc.h> |
| #include <asm/page.h> |
| |
| #ifndef __ASSEMBLY__ |
| |
| struct mm_struct; |
| |
| /* |
| * Don't change this structure - ASM code relies on it. |
| */ |
| extern struct processor { |
| /* MISC |
| * get data abort address/flags |
| */ |
| void (*_data_abort)(unsigned long pc); |
| /* |
| * Retrieve prefetch fault address |
| */ |
| unsigned long (*_prefetch_abort)(unsigned long lr); |
| /* |
| * Set up any processor specifics |
| */ |
| void (*_proc_init)(void); |
| /* |
| * Disable any processor specifics |
| */ |
| void (*_proc_fin)(void); |
| /* |
| * Special stuff for a reset |
| */ |
| void (*reset)(unsigned long addr, bool hvc) __attribute__((noreturn)); |
| /* |
| * Idle the processor |
| */ |
| int (*_do_idle)(void); |
| /* |
| * Processor architecture specific |
| */ |
| /* |
| * clean a virtual address range from the |
| * D-cache without flushing the cache. |
| */ |
| void (*dcache_clean_area)(void *addr, int size); |
| |
| /* |
| * Set the page table |
| */ |
| void (*switch_mm)(phys_addr_t pgd_phys, struct mm_struct *mm); |
| /* |
| * Set a possibly extended PTE. Non-extended PTEs should |
| * ignore 'ext'. |
| */ |
| #ifdef CONFIG_ARM_LPAE |
| void (*set_pte_ext)(pte_t *ptep, pte_t pte); |
| #else |
| void (*set_pte_ext)(pte_t *ptep, pte_t pte, unsigned int ext); |
| #endif |
| |
| /* Suspend/resume */ |
| unsigned int suspend_size; |
| void (*do_suspend)(void *); |
| void (*do_resume)(void *); |
| } processor; |
| |
| #ifndef MULTI_CPU |
| extern void cpu_proc_init(void); |
| extern void cpu_proc_fin(void); |
| extern int cpu_do_idle(void); |
| extern void cpu_dcache_clean_area(void *, int); |
| extern void cpu_do_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm); |
| #ifdef CONFIG_ARM_LPAE |
| extern void cpu_set_pte_ext(pte_t *ptep, pte_t pte); |
| #else |
| extern void cpu_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext); |
| #endif |
| extern void cpu_reset(unsigned long addr, bool hvc) __attribute__((noreturn)); |
| |
| /* These three are private to arch/arm/kernel/suspend.c */ |
| extern void cpu_do_suspend(void *); |
| extern void cpu_do_resume(void *); |
| #else |
| #define cpu_proc_init processor._proc_init |
| #define cpu_proc_fin processor._proc_fin |
| #define cpu_reset processor.reset |
| #define cpu_do_idle processor._do_idle |
| #define cpu_dcache_clean_area processor.dcache_clean_area |
| #define cpu_set_pte_ext processor.set_pte_ext |
| #define cpu_do_switch_mm processor.switch_mm |
| |
| /* These three are private to arch/arm/kernel/suspend.c */ |
| #define cpu_do_suspend processor.do_suspend |
| #define cpu_do_resume processor.do_resume |
| #endif |
| |
| extern void cpu_resume(void); |
| |
| #include <asm/memory.h> |
| |
| #ifdef CONFIG_MMU |
| |
| #define cpu_switch_mm(pgd,mm) cpu_do_switch_mm(virt_to_phys(pgd),mm) |
| |
| #ifdef CONFIG_ARM_LPAE |
| |
| #define cpu_get_ttbr(nr) \ |
| ({ \ |
| u64 ttbr; \ |
| __asm__("mrrc p15, " #nr ", %Q0, %R0, c2" \ |
| : "=r" (ttbr)); \ |
| ttbr; \ |
| }) |
| |
| #define cpu_get_pgd() \ |
| ({ \ |
| u64 pg = cpu_get_ttbr(0); \ |
| pg &= ~(PTRS_PER_PGD*sizeof(pgd_t)-1); \ |
| (pgd_t *)phys_to_virt(pg); \ |
| }) |
| #else |
| #define cpu_get_pgd() \ |
| ({ \ |
| unsigned long pg; \ |
| __asm__("mrc p15, 0, %0, c2, c0, 0" \ |
| : "=r" (pg) : : "cc"); \ |
| pg &= ~0x3fff; \ |
| (pgd_t *)phys_to_virt(pg); \ |
| }) |
| #endif |
| |
| #else /*!CONFIG_MMU */ |
| |
| #define cpu_switch_mm(pgd,mm) { } |
| |
| #endif |
| |
| #endif /* __ASSEMBLY__ */ |
| #endif /* __KERNEL__ */ |
| #endif /* __ASM_PROCFNS_H */ |