| #ifndef __ASM_SH_PROCESSOR_64_H |
| #define __ASM_SH_PROCESSOR_64_H |
| |
| /* |
| * include/asm-sh/processor_64.h |
| * |
| * Copyright (C) 2000, 2001 Paolo Alberelli |
| * Copyright (C) 2003 Paul Mundt |
| * Copyright (C) 2004 Richard Curnow |
| * |
| * 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. |
| */ |
| #ifndef __ASSEMBLY__ |
| |
| #include <linux/compiler.h> |
| #include <asm/page.h> |
| #include <asm/types.h> |
| #include <asm/cache.h> |
| #include <asm/ptrace.h> |
| #include <cpu/registers.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; }) |
| |
| /* |
| * 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; |
| unsigned long asid_cache; |
| |
| unsigned int cpu_clock, master_clock, bus_clock, module_clock; |
| |
| /* Cache info */ |
| struct cache_info icache; |
| struct cache_info dcache; |
| struct cache_info scache; |
| |
| /* TLB info */ |
| struct tlb_info itlb; |
| struct tlb_info dtlb; |
| |
| unsigned long flags; |
| }; |
| |
| extern struct sh_cpuinfo cpu_data[]; |
| #define boot_cpu_data cpu_data[0] |
| #define current_cpu_data cpu_data[smp_processor_id()] |
| #define raw_current_cpu_data cpu_data[raw_smp_processor_id()] |
| |
| #endif |
| |
| /* |
| * User space process size: 2GB - 4k. |
| */ |
| #define TASK_SIZE 0x7ffff000UL |
| |
| #define STACK_TOP TASK_SIZE |
| #define STACK_TOP_MAX STACK_TOP |
| |
| /* 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 |
| * |
| */ |
| #if defined(CONFIG_SH64_SR_WATCH) |
| #define SR_MMU 0x84000000 |
| #else |
| #define SR_MMU 0x80000000 |
| #endif |
| |
| #define SR_IMASK 0x000000f0 |
| #define SR_FD 0x00008000 |
| #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 } |
| |
| #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. |
| */ |
| |
| static inline void disable_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)); |
| } |
| |
| static inline void enable_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 |
| |
| #ifdef CONFIG_SH_FPU |
| /* Initialise the FP state of a task */ |
| void fpinit(struct sh_fpu_hard_struct *fpregs); |
| #else |
| #define fpinit(fpregs) do { } while (0) |
| #endif |
| |
| 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 user_stack_pointer(regs) ((regs)->sp) |
| |
| #define cpu_relax() barrier() |
| |
| #endif /* __ASSEMBLY__ */ |
| #endif /* __ASM_SH_PROCESSOR_64_H */ |