projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 92ab45c5 CL |
1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef _ASM_POWERPC_TASK_SIZE_64_H | |
| 3 | #define _ASM_POWERPC_TASK_SIZE_64_H | |
| 4 | ||
| 5 | /* | |
| 6 | * 64-bit user address space can have multiple limits | |
| 7 | * For now supported values are: | |
| 8 | */ | |
| 9 | #define TASK_SIZE_64TB (0x0000400000000000UL) | |
| 10 | #define TASK_SIZE_128TB (0x0000800000000000UL) | |
| 11 | #define TASK_SIZE_512TB (0x0002000000000000UL) | |
| 12 | #define TASK_SIZE_1PB (0x0004000000000000UL) | |
| 13 | #define TASK_SIZE_2PB (0x0008000000000000UL) | |
| 14 | ||
| 15 | /* | |
| 16 | * With 52 bits in the address we can support up to 4PB of range. | |
| 17 | */ | |
| 18 | #define TASK_SIZE_4PB (0x0010000000000000UL) | |
| 19 | ||
| 20 | /* | |
| 21 | * For now 512TB is only supported with book3s and 64K linux page size. | |
| 22 | */ | |
| 5874cabe | 23 | #ifdef CONFIG_PPC_64K_PAGES |
| 92ab45c5 CL |
24 | /* |
| 25 | * Max value currently used: | |
| 26 | */ | |
| 27 | #define TASK_SIZE_USER64 TASK_SIZE_4PB | |
| 28 | #define DEFAULT_MAP_WINDOW_USER64 TASK_SIZE_128TB | |
| 29 | #define TASK_CONTEXT_SIZE TASK_SIZE_512TB | |
| 30 | #else | |
| 31 | #define TASK_SIZE_USER64 TASK_SIZE_64TB | |
| 32 | #define DEFAULT_MAP_WINDOW_USER64 TASK_SIZE_64TB | |
| 33 | ||
| 34 | /* | |
| 35 | * We don't need to allocate extended context ids for 4K page size, because we | |
| 36 | * limit the max effective address on this config to 64TB. | |
| 37 | */ | |
| 38 | #define TASK_CONTEXT_SIZE TASK_SIZE_64TB | |
| 39 | #endif | |
| 40 | ||
| 41 | /* | |
| 42 | * 32-bit user address space is 4GB - 1 page | |
| 43 | * (this 1 page is needed so referencing of 0xFFFFFFFF generates EFAULT | |
| 44 | */ | |
| 45 | #define TASK_SIZE_USER32 (0x0000000100000000UL - (1 * PAGE_SIZE)) | |
| 46 | ||
| 47 | #define TASK_SIZE_OF(tsk) \ | |
| 48 | (test_tsk_thread_flag(tsk, TIF_32BIT) ? TASK_SIZE_USER32 : \ | |
| 49 | TASK_SIZE_USER64) | |
| 50 | ||
| 51 | #define TASK_SIZE TASK_SIZE_OF(current) | |
| 52 | ||
| 53 | #define TASK_UNMAPPED_BASE_USER32 (PAGE_ALIGN(TASK_SIZE_USER32 / 4)) | |
| 54 | #define TASK_UNMAPPED_BASE_USER64 (PAGE_ALIGN(DEFAULT_MAP_WINDOW_USER64 / 4)) | |
| 55 | ||
| 56 | /* | |
| 57 | * This decides where the kernel will search for a free chunk of vm space during | |
| 58 | * mmap's. | |
| 59 | */ | |
| 60 | #define TASK_UNMAPPED_BASE \ | |
| 61 | ((is_32bit_task()) ? TASK_UNMAPPED_BASE_USER32 : TASK_UNMAPPED_BASE_USER64) | |
| 62 | ||
| 63 | /* | |
| 64 | * Initial task size value for user applications. For book3s 64 we start | |
| 65 | * with 128TB and conditionally enable upto 512TB | |
| 66 | */ | |
| 67 | #ifdef CONFIG_PPC_BOOK3S_64 | |
| 68 | #define DEFAULT_MAP_WINDOW \ | |
| 69 | ((is_32bit_task()) ? TASK_SIZE_USER32 : DEFAULT_MAP_WINDOW_USER64) | |
| 70 | #else | |
| 71 | #define DEFAULT_MAP_WINDOW TASK_SIZE | |
| 72 | #endif | |
| 73 | ||
| 74 | #define STACK_TOP_USER64 DEFAULT_MAP_WINDOW_USER64 | |
| 75 | #define STACK_TOP_USER32 TASK_SIZE_USER32 | |
| 76 | #define STACK_TOP_MAX TASK_SIZE_USER64 | |
| 77 | #define STACK_TOP (is_32bit_task() ? STACK_TOP_USER32 : STACK_TOP_USER64) | |
| 78 | ||
| 79 | #endif /* _ASM_POWERPC_TASK_SIZE_64_H */ |