Lennert Buytenhek | c471307 | 2006-03-28 21:18:54 +0100 | [diff] [blame] | 1 | /* |
| 2 | * include/asm-arm/arch-ixp23xx/memory.h |
| 3 | * |
| 4 | * Copyright (c) 2003-2004 Intel Corp. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License as published by the |
| 8 | * Free Software Foundation; either version 2 of the License, or (at your |
| 9 | * option) any later version. |
| 10 | */ |
| 11 | |
| 12 | #ifndef __ASM_ARCH_MEMORY_H |
| 13 | #define __ASM_ARCH_MEMORY_H |
| 14 | |
| 15 | #include <asm/hardware.h> |
| 16 | |
| 17 | /* |
| 18 | * Physical DRAM offset. |
| 19 | */ |
| 20 | #define PHYS_OFFSET (0x00000000) |
| 21 | |
| 22 | |
| 23 | /* |
| 24 | * Virtual view <-> DMA view memory address translations |
| 25 | * virt_to_bus: Used to translate the virtual address to an |
| 26 | * address suitable to be passed to set_dma_addr |
| 27 | * bus_to_virt: Used to convert an address for DMA operations |
| 28 | * to an address that the kernel can use. |
| 29 | */ |
| 30 | #ifndef __ASSEMBLY__ |
Lennert Buytenhek | 23759dc | 2006-04-02 00:07:39 +0100 | [diff] [blame] | 31 | #include <asm/mach-types.h> |
Lennert Buytenhek | c471307 | 2006-03-28 21:18:54 +0100 | [diff] [blame] | 32 | |
| 33 | #define __virt_to_bus(v) \ |
| 34 | ({ unsigned int ret; \ |
| 35 | ret = ((__virt_to_phys(v) - 0x00000000) + \ |
| 36 | (*((volatile int *)IXP23XX_PCI_SDRAM_BAR) & 0xfffffff0)); \ |
| 37 | ret; }) |
| 38 | |
| 39 | #define __bus_to_virt(b) \ |
| 40 | ({ unsigned int data; \ |
| 41 | data = *((volatile int *)IXP23XX_PCI_SDRAM_BAR); \ |
| 42 | __phys_to_virt((((b - (data & 0xfffffff0)) + 0x00000000))); }) |
| 43 | |
Lennert Buytenhek | 23759dc | 2006-04-02 00:07:39 +0100 | [diff] [blame] | 44 | /* |
| 45 | * Coherency support. Only supported on A2 CPUs or on A1 |
| 46 | * systems that have the cache coherency workaround. |
| 47 | */ |
| 48 | static inline int __ixp23xx_arch_is_coherent(void) |
| 49 | { |
| 50 | extern unsigned int processor_id; |
| 51 | |
Lennert Buytenhek | a77bc69 | 2006-06-02 19:51:50 +0100 | [diff] [blame] | 52 | if (((processor_id & 15) >= 4) || machine_is_roadrunner()) |
Lennert Buytenhek | 23759dc | 2006-04-02 00:07:39 +0100 | [diff] [blame] | 53 | return 1; |
| 54 | |
| 55 | return 0; |
| 56 | } |
| 57 | |
| 58 | #define arch_is_coherent() __ixp23xx_arch_is_coherent() |
| 59 | |
Lennert Buytenhek | c471307 | 2006-03-28 21:18:54 +0100 | [diff] [blame] | 60 | #endif |
| 61 | |
| 62 | |
| 63 | #endif |