diff options
author | Mark Brown <broonie@kernel.org> | 2014-10-09 18:02:47 +0100 |
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committer | Mark Brown <broonie@kernel.org> | 2014-10-09 18:02:47 +0100 |
commit | 2606d2448703e8995ca39a59d8a1106a1e0f034a (patch) | |
tree | 588f1b850a7e13d0e2f3461d66909db55c7531fb /arch/arm64/include/asm/fixmap.h | |
parent | 8bb495e3f02401ee6f76d1b1d77f3ac9f079e376 (diff) | |
parent | b8a669d29702a8fb529f4fae450a86b8676b0e42 (diff) |
Merge tag 'kvm-for-lsk-v3.10-v1' of git://git.linaro.org/people/christoffer.dall/linux-kvm-arm into lsk-v3.10-kvmv3.10/topic/kvm
KVM/ARM/arm64 Support for LSK v3.10
Diffstat (limited to 'arch/arm64/include/asm/fixmap.h')
-rw-r--r-- | arch/arm64/include/asm/fixmap.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/fixmap.h b/arch/arm64/include/asm/fixmap.h new file mode 100644 index 000000000000..5f7bfe6df723 --- /dev/null +++ b/arch/arm64/include/asm/fixmap.h @@ -0,0 +1,67 @@ +/* + * fixmap.h: compile-time virtual memory allocation + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 1998 Ingo Molnar + * Copyright (C) 2013 Mark Salter <msalter@redhat.com> + * + * Adapted from arch/x86_64 version. + * + */ + +#ifndef _ASM_ARM64_FIXMAP_H +#define _ASM_ARM64_FIXMAP_H + +#ifndef __ASSEMBLY__ +#include <linux/kernel.h> +#include <asm/page.h> + +/* + * Here we define all the compile-time 'special' virtual + * addresses. The point is to have a constant address at + * compile time, but to set the physical address only + * in the boot process. + * + * These 'compile-time allocated' memory buffers are + * page-sized. Use set_fixmap(idx,phys) to associate + * physical memory with fixmap indices. + * + */ +enum fixed_addresses { + FIX_EARLYCON_MEM_BASE, + __end_of_permanent_fixed_addresses, + + /* + * Temporary boot-time mappings, used by early_ioremap(), + * before ioremap() is functional. + */ +#ifdef CONFIG_ARM64_64K_PAGES +#define NR_FIX_BTMAPS 4 +#else +#define NR_FIX_BTMAPS 64 +#endif +#define FIX_BTMAPS_SLOTS 7 +#define TOTAL_FIX_BTMAPS (NR_FIX_BTMAPS * FIX_BTMAPS_SLOTS) + + FIX_BTMAP_END = __end_of_permanent_fixed_addresses, + FIX_BTMAP_BEGIN = FIX_BTMAP_END + TOTAL_FIX_BTMAPS - 1, + __end_of_fixed_addresses +}; + +#define FIXADDR_SIZE (__end_of_permanent_fixed_addresses << PAGE_SHIFT) +#define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE) + +#define FIXMAP_PAGE_IO __pgprot(PROT_DEVICE_nGnRE) + +extern void __early_set_fixmap(enum fixed_addresses idx, + phys_addr_t phys, pgprot_t flags); + +#define __set_fixmap __early_set_fixmap + +#include <asm-generic/fixmap.h> + +#endif /* !__ASSEMBLY__ */ +#endif /* _ASM_ARM64_FIXMAP_H */ |