From 9cce7a435f89c9e60f244d44da2cf1cf4ed094ac Mon Sep 17 00:00:00 2001 From: Catalin Marinas Date: Mon, 5 Mar 2012 11:49:28 +0000 Subject: arm64: CPU support This patch adds AArch64 CPU specific functionality. It assumes that the implementation is generic to AArch64 and does not require specific identification. Different CPU implementations may require the setting of various ACTLR_EL1 bits but such information is not currently available and it should ideally be pushed to firmware. Signed-off-by: Will Deacon Signed-off-by: Catalin Marinas Acked-by: Tony Lindgren Acked-by: Nicolas Pitre Acked-by: Olof Johansson Acked-by: Santosh Shilimkar --- arch/arm64/include/asm/proc-fns.h | 50 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 arch/arm64/include/asm/proc-fns.h (limited to 'arch/arm64/include/asm/proc-fns.h') diff --git a/arch/arm64/include/asm/proc-fns.h b/arch/arm64/include/asm/proc-fns.h new file mode 100644 index 000000000000..7cdf466fd0c5 --- /dev/null +++ b/arch/arm64/include/asm/proc-fns.h @@ -0,0 +1,50 @@ +/* + * Based on arch/arm/include/asm/proc-fns.h + * + * Copyright (C) 1997-1999 Russell King + * Copyright (C) 2000 Deep Blue Solutions Ltd + * Copyright (C) 2012 ARM 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ +#ifndef __ASM_PROCFNS_H +#define __ASM_PROCFNS_H + +#ifdef __KERNEL__ +#ifndef __ASSEMBLY__ + +#include + +struct mm_struct; + +extern void cpu_cache_off(void); +extern void cpu_do_idle(void); +extern void cpu_do_switch_mm(unsigned long pgd_phys, struct mm_struct *mm); +extern void cpu_reset(unsigned long addr) __attribute__((noreturn)); + +#include + +#define cpu_switch_mm(pgd,mm) cpu_do_switch_mm(virt_to_phys(pgd),mm) + +#define cpu_get_pgd() \ +({ \ + unsigned long pg; \ + asm("mrs %0, ttbr0_el1\n" \ + : "=r" (pg)); \ + pg &= ~0xffff000000003ffful; \ + (pgd_t *)phys_to_virt(pg); \ +}) + +#endif /* __ASSEMBLY__ */ +#endif /* __KERNEL__ */ +#endif /* __ASM_PROCFNS_H */ -- cgit v1.2.3-59-g8ed1b