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, 275 insertions, 0 deletions

diff --git a/include/asm-sh/processor.h b/include/asm-sh/processor.h
new file mode 100644
index 000000000000..c4904797d6df
--- /dev/null
+++ b/include/asm-sh/processor.h
@@ -0,0 +1,275 @@
+/*
+ * include/asm-sh/processor.h
+ *
+ * Copyright (C) 1999, 2000  Niibe Yutaka
+ * Copyright (C) 2002, 2003  Paul Mundt
+ */
+
+#ifndef __ASM_SH_PROCESSOR_H
+#define __ASM_SH_PROCESSOR_H
+#ifdef __KERNEL__
+
+#include <asm/page.h>
+#include <asm/types.h>
+#include <asm/cache.h>
+#include <linux/threads.h>
+#include <asm/ptrace.h>
+
+/*
+ * Default implementation of macro that returns current
+ * instruction pointer ("program counter").
+ */
+#define current_text_addr() ({ void *pc; __asm__("mova	1f, %0\n1:":"=z" (pc)); pc; })
+
+/* Core Processor Version Register */
+#define CCN_PVR		0xff000030
+#define CCN_CVR		0xff000040
+#define CCN_PRR		0xff000044
+
+/*
+ *  CPU type and hardware bug flags. Kept separately for each CPU.
+ *
+ *  Each one of these also needs a CONFIG_CPU_SUBTYPE_xxx entry
+ *  in arch/sh/Kconfig, as well as an entry in arch/sh/kernel/setup.c
+ *  for parsing the subtype in get_cpu_subtype().
+ */
+enum cpu_type {
+	/* SH-2 types */
+	CPU_SH7604,
+
+	/* SH-3 types */
+	CPU_SH7705, CPU_SH7707,  CPU_SH7708, CPU_SH7708S, CPU_SH7708R,
+	CPU_SH7709, CPU_SH7709A, CPU_SH7729, CPU_SH7300,
+
+	/* SH-4 types */
+	CPU_SH7750, CPU_SH7750S, CPU_SH7750R, CPU_SH7751, CPU_SH7751R,
+	CPU_SH7760, CPU_ST40RA, CPU_ST40GX1, CPU_SH4_202, CPU_SH4_501,
+	CPU_SH73180,
+
+	/* Unknown subtype */
+	CPU_SH_NONE
+};
+
+struct sh_cpuinfo {
+	enum cpu_type type;
+	char	hard_math;
+	unsigned long loops_per_jiffy;
+
+	unsigned int cpu_clock, master_clock, bus_clock, module_clock;
+#ifdef CONFIG_CPU_SUBTYPE_ST40STB1
+	unsigned int memory_clock;
+#endif
+
+	struct cache_info icache;
+	struct cache_info dcache;
+
+	unsigned long flags;
+};
+
+extern struct sh_cpuinfo boot_cpu_data;
+
+#ifdef CONFIG_SMP
+extern struct sh_cpuinfo cpu_data[];
+#define current_cpu_data cpu_data[smp_processor_id()]
+#else
+#define cpu_data (&boot_cpu_data)
+#define current_cpu_data boot_cpu_data
+#endif
+
+/*
+ * User space process size: 2GB.
+ *
+ * Since SH7709 and SH7750 have "area 7", we can't use 0x7c000000--0x7fffffff
+ */
+#define TASK_SIZE	0x7c000000UL
+
+/* This decides where the kernel will search for a free chunk of vm
+ * space during mmap's.
+ */
+#define TASK_UNMAPPED_BASE	(TASK_SIZE / 3)
+
+/*
+ * Bit of SR register
+ *
+ * FD-bit:
+ *     When it's set, it means the processor doesn't have right to use FPU,
+ *     and it results exception when the floating operation is executed.
+ *
+ * IMASK-bit:
+ *     Interrupt level mask
+ */
+#define SR_FD		0x00008000
+#define SR_DSP		0x00001000
+#define SR_IMASK	0x000000f0
+
+/*
+ * FPU structure and data
+ */
+
+struct sh_fpu_hard_struct {
+	unsigned long fp_regs[16];
+	unsigned long xfp_regs[16];
+	unsigned long fpscr;
+	unsigned long fpul;
+
+	long status; /* software status information */
+};
+
+/* Dummy fpu emulator  */
+struct sh_fpu_soft_struct {
+	unsigned long fp_regs[16];
+	unsigned long xfp_regs[16];
+	unsigned long fpscr;
+	unsigned long fpul;
+
+	unsigned char lookahead;
+	unsigned long entry_pc;
+};
+
+union sh_fpu_union {
+	struct sh_fpu_hard_struct hard;
+	struct sh_fpu_soft_struct soft;
+};
+
+/* 
+ * Processor flags
+ */
+
+#define CPU_HAS_FPU		0x0001	/* Hardware FPU support */
+#define CPU_HAS_P2_FLUSH_BUG	0x0002	/* Need to flush the cache in P2 area */
+#define CPU_HAS_MMU_PAGE_ASSOC	0x0004	/* SH3: TLB way selection bit support */
+#define CPU_HAS_DSP		0x0008	/* SH-DSP: DSP support */
+#define CPU_HAS_PERF_COUNTER	0x0010	/* Hardware performance counters */
+
+struct thread_struct {
+	unsigned long sp;
+	unsigned long pc;
+
+	unsigned long trap_no, error_code;
+	unsigned long address;
+	/* Hardware debugging registers may come here */
+	unsigned long ubc_pc;
+
+	/* floating point info */
+	union sh_fpu_union fpu;
+};
+
+/* Count of active tasks with UBC settings */
+extern int ubc_usercnt;
+
+#define INIT_THREAD  {						\
+	sizeof(init_stack) + (long) &init_stack, /* sp */	\
+	0,					 /* pc */	\
+	0, 0, 							\
+	0, 							\
+	0, 							\
+	{{{0,}},} 				/* fpu state */	\
+}
+
+/*
+ * Do necessary setup to start up a newly executed thread.
+ */
+#define start_thread(regs, new_pc, new_sp)	 \
+	set_fs(USER_DS);			 \
+	regs->pr = 0;   		 	 \
+	regs->sr = SR_FD;	/* User mode. */ \
+	regs->pc = new_pc;			 \
+	regs->regs[15] = new_sp
+
+/* Forward declaration, a strange C thing */
+struct task_struct;
+struct mm_struct;
+
+/* Free all resources held by a thread. */
+extern void release_thread(struct task_struct *);
+
+/* Prepare to copy thread state - unlazy all lazy status */
+#define prepare_to_copy(tsk)	do { } while (0)
+
+/*
+ * create a kernel thread without removing it from tasklists
+ */
+extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
+
+/* Copy and release all segment info associated with a VM */
+#define copy_segments(p, mm)	do { } while(0)
+#define release_segments(mm)	do { } while(0)
+
+/*
+ * FPU lazy state save handling.
+ */
+
+static __inline__ void disable_fpu(void)
+{
+	unsigned long __dummy;
+
+	/* Set FD flag in SR */
+	__asm__ __volatile__("stc	sr, %0\n\t"
+			     "or	%1, %0\n\t"
+			     "ldc	%0, sr"
+			     : "=&r" (__dummy)
+			     : "r" (SR_FD));
+}
+
+static __inline__ void enable_fpu(void)
+{
+	unsigned long __dummy;
+
+	/* Clear out FD flag in SR */
+	__asm__ __volatile__("stc	sr, %0\n\t"
+			     "and	%1, %0\n\t"
+			     "ldc	%0, sr"
+			     : "=&r" (__dummy)
+			     : "r" (~SR_FD));
+}
+
+static __inline__ void release_fpu(struct pt_regs *regs)
+{
+	regs->sr |= SR_FD;
+}
+
+static __inline__ void grab_fpu(struct pt_regs *regs)
+{
+	regs->sr &= ~SR_FD;
+}
+
+#ifdef CONFIG_CPU_SH4
+extern void save_fpu(struct task_struct *__tsk, struct pt_regs *regs);
+#else
+#define save_fpu(tsk)	do { } while (0)
+#endif
+
+#define unlazy_fpu(tsk, regs) do { 				\
+	if (test_tsk_thread_flag(tsk, TIF_USEDFPU)) {	\
+		save_fpu(tsk, regs); 				\
+	}						\
+} while (0)
+
+#define clear_fpu(tsk, regs) do { 					\
+	if (test_tsk_thread_flag(tsk, TIF_USEDFPU)) { 		\
+		clear_tsk_thread_flag(tsk, TIF_USEDFPU); 	\
+		release_fpu(regs);					\
+	}							\
+} while (0)
+
+/* Double presision, NANS as NANS, rounding to nearest, no exceptions */
+#define FPSCR_INIT  0x00080000
+
+#define	FPSCR_CAUSE_MASK	0x0001f000	/* Cause bits */
+#define	FPSCR_FLAG_MASK		0x0000007c	/* Flag bits */
+
+/*
+ * Return saved PC of a blocked thread.
+ */
+#define thread_saved_pc(tsk)	(tsk->thread.pc)
+
+extern unsigned long get_wchan(struct task_struct *p);
+
+#define KSTK_EIP(tsk)  ((tsk)->thread.pc)
+#define KSTK_ESP(tsk)  ((tsk)->thread.sp)
+
+#define cpu_sleep()	__asm__ __volatile__ ("sleep" : : : "memory")
+#define cpu_relax()	do { } while (0)
+
+#endif /* __KERNEL__ */
+#endif /* __ASM_SH_PROCESSOR_H */