patch-2.4.19 linux-2.4.19/include/asm-arm/arch-mx1ads/memory.h

• Lines: 76
• Date: Fri Aug 2 17:39:45 2002
• Orig file: linux-2.4.18/include/asm-arm/arch-mx1ads/memory.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/include/asm-arm/arch-mx1ads/memory.h linux-2.4.19/include/asm-arm/arch-mx1ads/memory.h
@@ -0,0 +1,75 @@
+/*
+ *  linux/include/asm-arm/arch-mx1ads/memory.h
+ *
+ *  Copyright (C) 1999 ARM Limited
+ *  Copyright (C) 2002 Shane Nay (shane@minirl.com)
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#ifndef __ASM_ARCH_MMU_H
+#define __ASM_ARCH_MMU_H
+
+/*
+ * Task size: 3GB
+ */
+#define TASK_SIZE	(0xc0000000UL)
+#define TASK_SIZE_26	(0x04000000UL)
+
+/*
+ * This decides where the kernel will search for a free chunk of vm
+ * space during mmap's.
+ */
+#define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
+
+/*
+ * Page offset: 3GB
+ */
+/* Note
+ * This should be hot-swapable with a CONFIG_MX1ADS_SDRAM
+ * or something similar, so we can swap between SRAM and
+ * SDRAM running kernel.
+ */
+
+#ifdef CONFIG_ARCH_MX1ADS_SRAM
+#define PAGE_OFFSET	(0xc0000000UL)
+#define PHYS_OFFSET	(0x12000000UL)
+#else
+#define PAGE_OFFSET	(0xc0000000UL)
+#define PHYS_OFFSET	(0x08000000UL)
+#endif
+
+/*
+ * On mx1, the sdram/sram is contiguous
+ */
+#define __virt_to_phys__is_a_macro
+#define __virt_to_phys(vpage) ((vpage) - PAGE_OFFSET + PHYS_OFFSET)
+#define __phys_to_virt__is_a_macro
+#define __phys_to_virt(ppage) ((ppage) + PAGE_OFFSET - PHYS_OFFSET)
+
+/*
+ * Virtual view <-> DMA view memory address translations
+ * virt_to_bus: Used to translate the virtual address to an
+ *              address suitable to be passed to set_dma_addr
+ * bus_to_virt: Used to convert an address for DMA operations
+ *              to an address that the kernel can use.
+ */
+#define __virt_to_bus__is_a_macro
+#define __virt_to_bus(x)	(x - PAGE_OFFSET +  PHYS_OFFSET)
+#define __bus_to_virt__is_a_macro
+#define __bus_to_virt(x)	(x -  PHYS_OFFSET + PAGE_OFFSET)
+
+#define PHYS_TO_NID(addr)	(0)
+
+#endif