| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public |
| 3 | * License. See the file "COPYING" in the main directory of this archive |
| 4 | * for more details. |
| 5 | * |
| 6 | * Copyright (C) 2014 Imagination Technologies Ltd. |
| 7 | */ |
| 8 | |
| 9 | #ifndef _ASM_MALTA_SPACES_H |
| 10 | #define _ASM_MALTA_SPACES_H |
| 11 | |
| 12 | #ifdef CONFIG_EVA |
| 13 | |
| 14 | /* |
| 15 | * Traditional Malta Board Memory Map for EVA |
| 16 | * |
| 17 | * 0x00000000 - 0x0fffffff: 1st RAM region, 256MB |
| 18 | * 0x10000000 - 0x1bffffff: GIC and CPC Control Registers |
| 19 | * 0x1c000000 - 0x1fffffff: I/O And Flash |
| 20 | * 0x20000000 - 0x7fffffff: 2nd RAM region, 1.5GB |
| 21 | * 0x80000000 - 0xffffffff: Physical memory aliases to 0x0 (2GB) |
| 22 | * |
| 23 | * The kernel is still located in 0x80000000(kseg0). However, |
| 24 | * the physical mask has been shifted to 0x80000000 which exploits the alias |
| 25 | * on the Malta board. As a result of which, we override the __pa_symbol |
| 26 | * to peform direct mapping from virtual to physical addresses. In other |
| 27 | * words, the 0x80000000 virtual address maps to 0x80000000 physical address |
| 28 | * which in turn aliases to 0x0. We do this in order to be able to use a flat |
| 29 | * 2GB of memory (0x80000000 - 0xffffffff) so we can avoid the I/O hole in |
| 30 | * 0x10000000 - 0x1fffffff. |
| 31 | * The last 64KB of physical memory are reserved for correct HIGHMEM |
| 32 | * macros arithmetics. |
| 33 | * |
| 34 | */ |
| 35 | |
| 36 | #define PAGE_OFFSET _AC(0x0, UL) |
| 37 | #define PHYS_OFFSET _AC(0x80000000, UL) |
| 38 | #define HIGHMEM_START _AC(0xffff0000, UL) |
| 39 | |
| 40 | #define __pa_symbol(x) (RELOC_HIDE((unsigned long)(x), 0)) |
| 41 | |
| 42 | #endif /* CONFIG_EVA */ |
| 43 | |
| 44 | #include <asm/mach-generic/spaces.h> |
| 45 | |
| 46 | #endif /* _ASM_MALTA_SPACES_H */ |