patch-2.4.22 linux-2.4.22/include/asm-sh64/processor.h

• Lines: 280
• Date: 2003-08-25 04:44:44.000000000 -0700
• Orig file: linux-2.4.21/include/asm-sh64/processor.h
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.21/include/asm-sh64/processor.h linux-2.4.22/include/asm-sh64/processor.h
@@ -0,0 +1,279 @@
+#ifndef __ASM_SH64_PROCESSOR_H
+#define __ASM_SH64_PROCESSOR_H
+
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * include/asm-sh64/processor.h
+ *
+ * Copyright (C) 2000, 2001  Paolo Alberelli
+ * Copyright (C) 2003  Paul Mundt
+ *
+ */
+
+#include <asm/page.h>
+
+#ifndef __ASSEMBLY__
+
+#include <asm/types.h>
+#include <asm/cache.h>
+#include <asm/tlb.h>
+#include <asm/registers.h>
+#include <linux/threads.h>
+
+/*
+ * Default implementation of macro that returns current
+ * instruction pointer ("program counter").
+ */
+#define current_text_addr() ({ \
+void *pc; \
+unsigned long long __dummy; \
+__asm__("gettr	" __t0 ", %1\n\t" \
+	"pta	4, " __t0 "\n\t" \
+	"gettr	" __t0 ", %0\n\t" \
+	"ptabs	%1, " __t0 "\n\t"	\
+	:"=r" (pc), "=r" (__dummy) \
+	: "1" (__dummy)); \
+pc; })
+
+/*
+ *  CPU type and hardware bug flags. Kept separately for each CPU.
+ */
+enum cpu_type {
+	CPU_SH5_101,
+	CPU_SH5_103,
+	CPU_SH_NONE
+};
+
+struct sh_cpuinfo {
+	enum cpu_type type;
+	unsigned long loops_per_jiffy;
+
+	char	hard_math;
+
+	unsigned long *pgd_quick;
+	unsigned long *pmd_quick;
+	unsigned long *pte_quick;
+	unsigned long pgtable_cache_sz;
+	unsigned int cpu_clock, master_clock, bus_clock, module_clock;
+
+	/* Cache info */
+	struct cache_info icache;
+	struct cache_info dcache;
+
+	/* TLB info */
+	struct tlb_info itlb;
+	struct tlb_info dtlb;
+};
+
+extern struct sh_cpuinfo boot_cpu_data;
+
+#define cpu_data (&boot_cpu_data)
+#define current_cpu_data boot_cpu_data
+
+#endif
+
+/*
+ * User space process size: 2GB - 4k.
+ */
+#define TASK_SIZE	0x7ffff000UL
+
+/* 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
+ *
+ * STEP-bit:
+ *     Single step bit
+ *
+ */
+#define SR_FD    0x00008000
+
+#ifdef ST_DEBUG
+#define SR_MMU   0x84000000
+#else
+#define SR_MMU   0x80000000
+#endif
+
+#define SR_IMASK 0x000000f0
+#define SR_SSTEP 0x08000000
+
+#ifndef __ASSEMBLY__
+
+/*
+ * FPU structure and data
+ */
+
+struct sh_fpu_hard_struct {
+	unsigned long long fp_regs[32];
+	unsigned int fpscr;
+	/* long status; * software status information */
+};
+
+#if 0
+/* Dummy fpu emulator  */
+struct sh_fpu_soft_struct {
+	unsigned long long fp_regs[32];
+	unsigned int fpscr;
+	unsigned char lookahead;
+	unsigned long entry_pc;
+};
+#endif
+
+union sh_fpu_union {
+	struct sh_fpu_hard_struct hard;
+	// struct sh_fpu_soft_struct soft;
+};
+
+struct thread_struct {
+	unsigned long sp;
+	unsigned long pc;
+
+	unsigned long trap_no, error_code;
+	unsigned long address;
+	/* Hardware debugging registers may come here */
+
+        struct pt_regs *kregs;
+	/* floating point info */
+	union sh_fpu_union fpu;
+};
+
+#define INIT_MMAP \
+{ &init_mm, 0, 0, NULL, PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC, 1, NULL, NULL }
+
+extern  struct pt_regs fake_swapper_regs;
+
+#define INIT_THREAD  {						\
+	sizeof(init_stack) + (long) &init_stack, /* sp */	\
+	0,					 /* pc */	\
+	0, 0, 							\
+	0, 							\
+        &fake_swapper_regs,                     /*kregs*/       \
+	{{{0,}},} 				/* fpu state */	\
+}
+
+/*
+ * Do necessary setup to start up a newly executed thread.
+ */
+#define SR_USER (SR_MMU | SR_FD)
+
+#define start_thread(regs, new_pc, new_sp) 	 		\
+	set_fs(USER_DS);			 		\
+	regs->sr = SR_USER;	/* User mode. */ 		\
+	regs->pc = new_pc - 4;	/* Compensate syscall exit */	\
+	regs->pc |= 1;		/* Set SHmedia ! */		\
+	regs->regs[18] = 0;   		 	 		\
+	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 *);
+/*
+ * create a kernel thread without removing it from tasklists
+ */
+extern int arch_kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
+
+/*
+ * Bus types
+ */
+#define EISA_bus 0
+#define EISA_bus__is_a_macro /* for versions in ksyms.c */
+#define MCA_bus 0
+#define MCA_bus__is_a_macro /* for versions in ksyms.c */
+
+
+/* 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)
+#define forget_segments()	do { } while (0)
+
+/*
+ * FPU lazy state save handling.
+ */
+
+extern __inline__ void release_fpu(void)
+{
+	unsigned long long __dummy;
+
+	/* Set FD flag in SR */
+	__asm__ __volatile__("getcon	" __c0 ", %0\n\t"
+			     "or	%0, %1, %0\n\t"
+			     "putcon	%0, " __c0 "\n\t"
+			     : "=&r" (__dummy)
+			     : "r" (SR_FD));
+}
+
+extern __inline__ void grab_fpu(void)
+{
+	unsigned long long __dummy;
+
+	/* Clear out FD flag in SR */
+	__asm__ __volatile__("getcon	" __c0 ", %0\n\t"
+			     "and	%0, %1, %0\n\t"
+			     "putcon	%0, " __c0 "\n\t"
+			     : "=&r" (__dummy)
+			     : "r" (~SR_FD));
+}
+
+/* Round to nearest, no exceptions on inexact, overflow, underflow,
+   zero-divide, invalid.  Configure option for whether to flush denorms to
+   zero, or except if a denorm is encountered.  */
+#if defined(CONFIG_SH64_FPU_DENORM_FLUSH)
+#define FPSCR_INIT  0x00040000
+#else
+#define FPSCR_INIT  0x00000000
+#endif
+
+/* Save the current FP regs */
+void fpsave(struct sh_fpu_hard_struct *fpregs);
+
+/* Initialise the FP state of a task */
+void fpinit(struct sh_fpu_hard_struct *fpregs);
+
+/*
+ * Return saved PC of a blocked thread.
+ */
+extern __inline__ unsigned long thread_saved_pc(struct thread_struct *t)
+{
+	return t->pc;
+}
+
+extern unsigned long get_wchan(struct task_struct *p);
+
+#define KSTK_EIP(tsk)  ((tsk)->thread.pc)
+#define KSTK_ESP(tsk)  ((tsk)->thread.sp)
+
+#endif	/* __ASSEMBLY__ */
+
+#define TASK_STKPAGES	2		/* Must be power of 2. 2 minimum */
+#define THREAD_SIZE	(TASK_STKPAGES * PAGE_SIZE)
+#define INIT_TASK_SIZE	THREAD_SIZE
+
+
+#ifndef __ASSEMBLY__
+extern struct task_struct *last_task_used_math;
+
+extern struct task_struct * alloc_task_struct(void);
+extern void free_task_struct(struct task_struct *);
+#define get_task_struct(tsk)      atomic_inc(&mem_map[MAP_NR(tsk)].count)
+
+#define init_task	(init_task_union.task)
+#define init_stack	(init_task_union.stack)
+
+#endif	/* __ASSEMBLY__ */
+#endif /* __ASM_SH64_PROCESSOR_H */