Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 153 insertions, 0 deletions

diff --git a/include/asm-arm26/uaccess-asm.h b/include/asm-arm26/uaccess-asm.h
new file mode 100644
index 00000000000..19f798e338c
--- /dev/null
+++ b/include/asm-arm26/uaccess-asm.h
@@ -0,0 +1,153 @@
+/*
+ *  linux/include/asm-arm/proc-armo/uaccess.h
+ *
+ *  Copyright (C) 1996 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/*
+ * The fs functions are implemented on the ARM2 and ARM3 architectures
+ * manually.
+ * Use *_user functions to access user memory with faulting behaving
+ *   as though the user is accessing the memory.
+ * Use set_fs(get_ds()) and then the *_user functions to allow them to
+ *   access kernel memory.
+ */
+
+/*
+ * These are the values used to represent the user `fs' and the kernel `ds'
+ * FIXME - the KERNEL_DS should end at 0x03000000 but we want to access ROM at
+ * 0x03400000. ideally we want to forbid access to the IO space inbetween.
+ */
+#define KERNEL_DS	0x03FFFFFF
+#define USER_DS   	0x02000000
+
+extern uaccess_t uaccess_user, uaccess_kernel;
+
+static inline void set_fs (mm_segment_t fs)
+{
+	current_thread_info()->addr_limit = fs;
+	current->thread.uaccess = (fs == USER_DS ? &uaccess_user : &uaccess_kernel);
+}
+
+#define __range_ok(addr,size) ({					\
+	unsigned long flag, sum;					\
+	__asm__ __volatile__("subs %1, %0, %3; cmpcs %1, %2; movcs %0, #0" \
+		: "=&r" (flag), "=&r" (sum)				\
+		: "r" (addr), "Ir" (size), "0" (current_thread_info()->addr_limit)	\
+		: "cc");						\
+	flag; })
+
+#define __addr_ok(addr) ({						\
+	unsigned long flag;						\
+	__asm__ __volatile__("cmp %2, %0; movlo %0, #0"			\
+		: "=&r" (flag)						\
+		: "0" (current_thread_info()->addr_limit), "r" (addr)	\
+		: "cc");						\
+	(flag == 0); })
+
+#define __put_user_asm_byte(x,addr,err)					\
+	__asm__ __volatile__(						\
+	"	mov	r0, %1\n"					\
+	"	mov	r1, %2\n"					\
+	"	mov	r2, %0\n"					\
+	"	mov	lr, pc\n"					\
+	"	mov	pc, %3\n"					\
+	"	mov	%0, r2\n"					\
+	: "=r" (err)							\
+	: "r" (x), "r" (addr), "r" (current->thread.uaccess->put_byte),	\
+	  "0" (err)							\
+	: "r0", "r1", "r2", "lr")
+
+#define __put_user_asm_half(x,addr,err)					\
+	__asm__ __volatile__(						\
+	"	mov	r0, %1\n"					\
+	"	mov	r1, %2\n"					\
+	"	mov	r2, %0\n"					\
+	"	mov	lr, pc\n"					\
+	"	mov	pc, %3\n"					\
+	"	mov	%0, r2\n"					\
+	: "=r" (err)							\
+	: "r" (x), "r" (addr), "r" (current->thread.uaccess->put_half),	\
+	  "0" (err)							\
+	: "r0", "r1", "r2", "lr")
+
+#define __put_user_asm_word(x,addr,err)					\
+	__asm__ __volatile__(						\
+	"	mov	r0, %1\n"					\
+	"	mov	r1, %2\n"					\
+	"	mov	r2, %0\n"					\
+	"	mov	lr, pc\n"					\
+	"	mov	pc, %3\n"					\
+	"	mov	%0, r2\n"					\
+	: "=r" (err)							\
+	: "r" (x), "r" (addr), "r" (current->thread.uaccess->put_word),	\
+	  "0" (err)							\
+	: "r0", "r1", "r2", "lr")
+
+#define __put_user_asm_dword(x,addr,err)                                 \
+        __asm__ __volatile__(                                           \
+        "       mov     r0, %1\n"                                       \
+        "       mov     r1, %2\n"                                       \
+        "       mov     r2, %0\n"                                       \
+        "       mov     lr, pc\n"                                       \
+        "       mov     pc, %3\n"                                       \
+        "       mov     %0, r2\n"                                       \
+        : "=r" (err)                                                    \
+        : "r" (x), "r" (addr), "r" (current->thread.uaccess->put_dword), \
+          "0" (err)                                                     \
+        : "r0", "r1", "r2", "lr")
+
+#define __get_user_asm_byte(x,addr,err)					\
+	__asm__ __volatile__(						\
+	"	mov	r0, %2\n"					\
+	"	mov	r1, %0\n"					\
+	"	mov	lr, pc\n"					\
+	"	mov	pc, %3\n"					\
+	"	mov	%0, r1\n"					\
+	"	mov	%1, r0\n"					\
+	: "=r" (err), "=r" (x)						\
+	: "r" (addr), "r" (current->thread.uaccess->get_byte), "0" (err)	\
+	: "r0", "r1", "r2", "lr")
+
+#define __get_user_asm_half(x,addr,err)					\
+	__asm__ __volatile__(						\
+	"	mov	r0, %2\n"					\
+	"	mov	r1, %0\n"					\
+	"	mov	lr, pc\n"					\
+	"	mov	pc, %3\n"					\
+	"	mov	%0, r1\n"					\
+	"	mov	%1, r0\n"					\
+	: "=r" (err), "=r" (x)						\
+	: "r" (addr), "r" (current->thread.uaccess->get_half), "0" (err)	\
+	: "r0", "r1", "r2", "lr")
+
+#define __get_user_asm_word(x,addr,err)					\
+	__asm__ __volatile__(						\
+	"	mov	r0, %2\n"					\
+	"	mov	r1, %0\n"					\
+	"	mov	lr, pc\n"					\
+	"	mov	pc, %3\n"					\
+	"	mov	%0, r1\n"					\
+	"	mov	%1, r0\n"					\
+	: "=r" (err), "=r" (x)						\
+	: "r" (addr), "r" (current->thread.uaccess->get_word), "0" (err)	\
+	: "r0", "r1", "r2", "lr")
+
+#define __do_copy_from_user(to,from,n)					\
+	(n) = current->thread.uaccess->copy_from_user((to),(from),(n))
+
+#define __do_copy_to_user(to,from,n)					\
+	(n) = current->thread.uaccess->copy_to_user((to),(from),(n))
+
+#define __do_clear_user(addr,sz)					\
+	(sz) = current->thread.uaccess->clear_user((addr),(sz))
+
+#define __do_strncpy_from_user(dst,src,count,res)			\
+	(res) = current->thread.uaccess->strncpy_from_user(dst,src,count)
+
+#define __do_strnlen_user(s,n,res)					\
+	(res) = current->thread.uaccess->strnlen_user(s,n)