1 files changed, 286 insertions, 0 deletions

diff --git a/include/asm-sh64/processor.h b/include/asm-sh64/processor.h
new file mode 100644
index 000000000000..a51bd41e6fbc
--- /dev/null
+++ b/include/asm-sh64/processor.h
@@ -0,0 +1,286 @@
+#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
+ * Copyright (C) 2004  Richard Curnow
+ *
+ */
+
+#include <asm/page.h>
+
+#ifndef __ASSEMBLY__
+
+#include <asm/types.h>
+#include <asm/cache.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 = 0; \
+__asm__("gettr  tr0, %1\n\t" \
+        "pta    4, tr0\n\t" \
+        "gettr  tr0, %0\n\t" \
+        "ptabs  %1, tr0\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
+};
+
+/*
+ * TLB information structure
+ *
+ * Defined for both I and D tlb, per-processor.
+ */
+struct tlb_info {
+        unsigned long long next;
+        unsigned long long first;
+        unsigned long long last;
+
+        unsigned int entries;
+        unsigned int step;
+
+        unsigned long flags;
+};
+
+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
+
+#if defined(CONFIG_SH64_SR_WATCH)
+#define SR_MMU   0x84000000
+#else
+#define SR_MMU   0x80000000
+#endif
+
+#define SR_IMASK 0x000000f0
+#define SR_SSTEP 0x08000000
+
+#ifndef __ASSEMBLY__
+
+/*
+ * FPU structure and data : require 8-byte alignment as we need to access it
+   with fld.p, fst.p
+ */
+
+struct sh_fpu_hard_struct {
+        unsigned long fp_regs[64];
+        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;
+        /* 'hard' itself only produces 32 bit alignment, yet we need
+           to access it using 64 bit load/store as well. */
+        unsigned long long alignment_dummy;
+};
+
+struct thread_struct {
+        unsigned long sp;
+        unsigned long pc;
+        /* This stores the address of the pt_regs built during a context
+           switch, or of the register save area built for a kernel mode
+           exception.  It is used for backtracing the stack of a sleeping task
+           or one that traps in kernel mode. */
+        struct pt_regs *kregs;
+        /* This stores the address of the pt_regs constructed on entry from
+           user mode.  It is a fixed value over the lifetime of a process, or
+           NULL for a kernel thread. */
+        struct pt_regs *uregs;
+
+        unsigned long trap_no, error_code;
+        unsigned long address;
+        /* Hardware debugging registers may come here */
+
+        /* 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  {                          \
+        .sp             = sizeof(init_stack) +  \
+                          (long) &init_stack,   \
+        .pc             = 0,                    \
+        .kregs          = &fake_swapper_regs,   \
+        .uregs          = NULL,                 \
+        .trap_no        = 0,                    \
+        .error_code     = 0,                    \
+        .address        = 0,                    \
+        .fpu            = { { { 0, } }, }       \
+}
+
+/*
+ * 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 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)
+#define forget_segments()       do { } while (0)
+#define prepare_to_copy(tsk)    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    " __SR ", %0\n\t"
+                             "or        %0, %1, %0\n\t"
+                             "putcon    %0, " __SR "\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    " __SR ", %0\n\t"
+                             "and       %0, %1, %0\n\t"
+                             "putcon    %0, " __SR "\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);
+
+extern struct task_struct *last_task_used_math;
+
+/*
+ * 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_relax()     do { } while (0)
+
+#endif  /* __ASSEMBLY__ */
+#endif /* __ASM_SH64_PROCESSOR_H */
+