Initial commit

tasks/blkdev0/include/arch

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+arch-arm

tasks/blkdev0/include/blkdev.h

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+#ifndef __BLKDEV_H__
+#define __BLKDEV_H__
+
+struct block_device;
+
+struct block_device_ops {
+	void (*open)(struct block_device *bdev);
+	void (*read)(unsigned long offset, int size, void *buf);
+	void (*write)(unsigned long offset, int size, void *buf);
+	void (*read_page)(unsigned long pfn, void *buf);
+	void (*write_page)(unsigned long pfn, void *buf);
+};
+
+struct block_device {
+	char *name;
+	unsigned long size;
+	struct block_device_ops ops;
+};
+
+
+void init_blkdev(void);
+
+#endif /* __BLKDEV_H__ */

tasks/blkdev0/include/linker.lds

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+/*
+ * Simple linker script for userspace or svc tasks.
+ *
+ * Copyright (C) 2007 Bahadir Balban
+ */
+
+/*
+ * The only catch with this linker script is that everything
+ * is linked starting at virtual_base, and loaded starting
+ * at physical_base. virtual_base is the predefined region
+ * of virtual memory for userland applications. physical_base
+ * is determined at build-time, it is one of the subsequent pages
+ * that come after the kernel image's load area.
+ */
+/* USER_AREA_START, see memlayout.h */
+virtual_base = 0x10000000;
+__stack = 0x20000000;
+INCLUDE "include/physical_base.lds"
+
+/* physical_base = 0x228000; */
+offset = virtual_base - physical_base;
+
+ENTRY(_start)
+
+SECTIONS
+{
+	. = virtual_base;
+	_start_text = .;
+	.text : AT (ADDR(.text) - offset) { crt0.o(.text) *(.text) }
+	/* rodata is needed else your strings will link at physical! */
+	.rodata : AT (ADDR(.rodata) - offset) { *(.rodata) }
+	.rodata1 : AT (ADDR(.rodata1) - offset) { *(.rodata1) }
+	.data : AT (ADDR(.data) - offset)
+	{
+		. = ALIGN(4K);
+		_start_ramdisk = .;
+		*(.data.fs)
+		_end_ramdisk = .;
+		*(.data)
+	}
+	.bss : AT (ADDR(.bss) - offset) { *(.bss) }
+	_end = .;
+}

tasks/blkdev0/include/physical_base.lds

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+/*
+ * The next free p_align'ed LMA base address
+ *
+ * p_align = 0x8000
+ *
+ * Recap from ELF spec: p_align: Loadable process segments must have
+ * congruent values for p_vaddr and p_offset, modulo the page size. 
+ * This member gives the value to which the segments are aligned in 
+ * memory and in the file. Values 0 and 1 mean that no alignment is 
+ * required. Otherwise, p_align should be a positive, integral power
+ * of 2, and p_addr should equal p_offset, modulo p_align. 
+ * This essentially means next available address must be aligned at
+ * p_align, rather than the page_size, which one (well, I) would 
+ * normally expect. 
+ */
+
+physical_base = 0x3000;

tasks/blkdev0/include/ramdisk.h

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+#ifndef __RAMDISK_H__
+#define __RAMDISK_H__
+
+extern struct block_device ramdisk;
+
+#endif