diff options
| author |   Catalin Marinas <catalin.marinas@arm.com> | 2012-03-05 11:49:28 +0000 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2012-09-17 13:41:59 +0100 |
| commit | 9cce7a435f89c9e60f244d44da2cf1cf4ed094ac (patch) | |
| tree | 7e207bd1afe61abebeabc6b22b8128c7654372a9 /arch/arm64/include/asm/proc-fns.h | |
| parent | arm64: Process management (diff) | |
| download | linux-dev-9cce7a435f89c9e60f244d44da2cf1cf4ed094ac.tar.xz linux-dev-9cce7a435f89c9e60f244d44da2cf1cf4ed094ac.zip | |
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 <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Diffstat (limited to 'arch/arm64/include/asm/proc-fns.h')
| -rw-r--r-- | arch/arm64/include/asm/proc-fns.h | 50 |
1 files changed, 50 insertions, 0 deletions
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 <http://www.gnu.org/licenses/>. + */ +#ifndef __ASM_PROCFNS_H +#define __ASM_PROCFNS_H + +#ifdef __KERNEL__ +#ifndef __ASSEMBLY__ + +#include <asm/page.h> + +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 <asm/memory.h> + +#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 */ |