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!
diff --git a/include/asm-cris/system.h b/include/asm-cris/system.h
new file mode 100644
index 0000000..e067398
--- /dev/null
+++ b/include/asm-cris/system.h
@@ -0,0 +1,74 @@
+#ifndef __ASM_CRIS_SYSTEM_H
+#define __ASM_CRIS_SYSTEM_H
+
+#include <asm/arch/system.h>
+
+/* the switch_to macro calls resume, an asm function in entry.S which does the actual
+ * task switching.
+ */
+
+extern struct task_struct *resume(struct task_struct *prev, struct task_struct *next, int);
+#define prepare_to_switch() do { } while(0)
+#define switch_to(prev,next,last) last = resume(prev,next, \
+ (int)&((struct task_struct *)0)->thread)
+
+#define barrier() __asm__ __volatile__("": : :"memory")
+#define mb() barrier()
+#define rmb() mb()
+#define wmb() mb()
+#define read_barrier_depends() do { } while(0)
+#define set_mb(var, value) do { var = value; mb(); } while (0)
+#define set_wmb(var, value) do { var = value; wmb(); } while (0)
+
+#ifdef CONFIG_SMP
+#define smp_mb() mb()
+#define smp_rmb() rmb()
+#define smp_wmb() wmb()
+#define smp_read_barrier_depends() read_barrier_depends()
+#else
+#define smp_mb() barrier()
+#define smp_rmb() barrier()
+#define smp_wmb() barrier()
+#define smp_read_barrier_depends() do { } while(0)
+#endif
+
+#define iret()
+
+/*
+ * disable hlt during certain critical i/o operations
+ */
+#define HAVE_DISABLE_HLT
+void disable_hlt(void);
+void enable_hlt(void);
+
+extern inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
+{
+ /* since Etrax doesn't have any atomic xchg instructions, we need to disable
+ irq's (if enabled) and do it with move.d's */
+ unsigned long flags,temp;
+ local_save_flags(flags); /* save flags, including irq enable bit */
+ local_irq_disable(); /* shut off irq's */
+ switch (size) {
+ case 1:
+ *((unsigned char *)&temp) = x;
+ x = *(unsigned char *)ptr;
+ *(unsigned char *)ptr = *((unsigned char *)&temp);
+ break;
+ case 2:
+ *((unsigned short *)&temp) = x;
+ x = *(unsigned short *)ptr;
+ *(unsigned short *)ptr = *((unsigned short *)&temp);
+ break;
+ case 4:
+ temp = x;
+ x = *(unsigned long *)ptr;
+ *(unsigned long *)ptr = temp;
+ break;
+ }
+ local_irq_restore(flags); /* restore irq enable bit */
+ return x;
+}
+
+#define arch_align_stack(x) (x)
+
+#endif