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Diffstat (limited to 'i386/x15/param.h')
| -rw-r--r-- | i386/x15/param.h | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/i386/x15/param.h b/i386/x15/param.h new file mode 100644 index 0000000..f8f9c33 --- /dev/null +++ b/i386/x15/param.h @@ -0,0 +1,185 @@ +/* + * Copyright (c) 2010-2014 Richard Braun. + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * 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/>. + * + * + * This file is a top header in the inclusion hierarchy, and shouldn't include + * other headers that may cause circular dependencies. + */ + +#ifndef _X86_PARAM_H +#define _X86_PARAM_H + +#include <kern/macros.h> + +#define __LITTLE_ENDIAN__ + +/* + * L1 cache line size. + * + * XXX Use this value until processor selection is available. + */ +#define CPU_L1_SIZE 64 + +/* + * Code/data alignment. + */ +#define TEXT_ALIGN 16 + +#ifdef __LP64__ +#define DATA_ALIGN 8 +#else /* __LP64__ */ +#define DATA_ALIGN 4 +#endif /* __LP64__ */ + +/* + * Attributes for variables that are mostly read and seldom changed. + */ +#define __read_mostly __section(".data.read_mostly") + +/* + * Provide architecture-specific string functions. + */ +#define ARCH_STRING_MEMCPY +#define ARCH_STRING_MEMMOVE +#define ARCH_STRING_MEMSET +#define ARCH_STRING_MEMCMP +#define ARCH_STRING_STRLEN +#define ARCH_STRING_STRCPY +#define ARCH_STRING_STRCMP + +/* + * System timer frequency. + * + * The selected value of 200 translates to a period of 5ms, small enough to + * provide low latency, and is practical as both a dividend and divisor. + */ +#define HZ 200 + +/* + * 4 KiB pages. + */ +#define PAGE_SHIFT 12 +#define PAGE_SIZE (1 << PAGE_SHIFT) +#define PAGE_MASK (PAGE_SIZE - 1) + +/* + * Kernel stack size for threads and interrupt handlers. + */ +#define STACK_SIZE PAGE_SIZE + +/* + * Virtual memory properties. + */ + +/* + * User space boundaries. + */ +#define VM_MIN_ADDRESS DECL_CONST(0, UL) + +#ifdef __LP64__ +#define VM_MAX_ADDRESS DECL_CONST(0x800000000000, UL) +#else /* __LP64__ */ +#define VM_MAX_ADDRESS DECL_CONST(0xc0000000, UL) +#endif/* __LP64__ */ + +/* + * Kernel space boundaries. + */ +#ifdef __LP64__ +#define VM_MIN_KERNEL_ADDRESS DECL_CONST(0xffff800000000000, UL) +#define VM_MAX_KERNEL_ADDRESS DECL_CONST(0xfffffffffffff000, UL) +#else /* __LP64__ */ +#define VM_MIN_KERNEL_ADDRESS VM_MAX_ADDRESS +#define VM_MAX_KERNEL_ADDRESS DECL_CONST(0xfffff000, UL) +#endif /* __LP64__ */ + +/* + * Direct physical mapping boundaries. + */ +#ifdef __LP64__ +#define VM_MIN_DIRECTMAP_ADDRESS VM_MIN_KERNEL_ADDRESS +#define VM_MAX_DIRECTMAP_ADDRESS DECL_CONST(0xffffc00000000000, UL) +#else /* __LP64__ */ +#define VM_MIN_DIRECTMAP_ADDRESS VM_MAX_ADDRESS +#define VM_MAX_DIRECTMAP_ADDRESS DECL_CONST(0xf8000000, UL) +#endif /* __LP64__ */ + +/* + * Kernel mapping offset. + * + * On 32-bits systems, the kernel is linked at addresses included in the + * direct physical mapping, whereas on 64-bits systems, it is linked at + * -2 GiB because the "kernel" memory model is used when compiling (see + * the -mcmodel=kernel gcc option). + */ +#ifdef __LP64__ +#define VM_KERNEL_OFFSET DECL_CONST(0xffffffff80000000, UL) +#else /* __LP64__ */ +#define VM_KERNEL_OFFSET VM_MIN_DIRECTMAP_ADDRESS +#endif /* __LP64__ */ + +/* + * Kernel virtual space boundaries. + * + * In addition to the direct physical mapping, the kernel has its own virtual + * memory space. + */ +#define VM_MIN_KMEM_ADDRESS VM_MAX_DIRECTMAP_ADDRESS + +#ifdef __LP64__ +#define VM_MAX_KMEM_ADDRESS VM_KERNEL_OFFSET +#else /* __LP64__ */ +#define VM_MAX_KMEM_ADDRESS DECL_CONST(0xfffff000, UL) +#endif /* __LP64__ */ + +/* + * Physical memory properties. + */ + +#define VM_PAGE_DMA_LIMIT DECL_CONST(0x1000000, UL) + +#ifdef __LP64__ +#define VM_PAGE_MAX_SEGS 4 +#define VM_PAGE_DMA32_LIMIT DECL_CONST(0x100000000, UL) +#define VM_PAGE_DIRECTMAP_LIMIT DECL_CONST(0x400000000000, UL) +#define VM_PAGE_HIGHMEM_LIMIT DECL_CONST(0x10000000000000, UL) +#else /* __LP64__ */ +#define VM_PAGE_DIRECTMAP_LIMIT DECL_CONST(0x38000000, ULL) +#ifdef X86_PAE +#define VM_PAGE_MAX_SEGS 3 +#define VM_PAGE_HIGHMEM_LIMIT DECL_CONST(0x10000000000000, ULL) +#else /* X86_PAE */ +#define VM_PAGE_MAX_SEGS 3 +#define VM_PAGE_HIGHMEM_LIMIT DECL_CONST(0xfffff000, UL) +#endif /* X86_PAE */ +#endif /* __LP64__ */ + +/* + * Physical segment indexes. + */ +#define VM_PAGE_SEG_DMA 0 + +#ifdef __LP64__ +#define VM_PAGE_SEG_DMA32 1 +#define VM_PAGE_SEG_DIRECTMAP 2 +#define VM_PAGE_SEG_HIGHMEM 3 +#else /* __LP64__ */ +#define VM_PAGE_SEG_DMA32 1 /* Alias for the DIRECTMAP segment */ +#define VM_PAGE_SEG_DIRECTMAP 1 +#define VM_PAGE_SEG_HIGHMEM 2 +#endif /* __LP64__ */ + +#endif /* _X86_PARAM_H */ |