diff options
Diffstat (limited to 'arch/sh/include/asm/processor_64.h')
| -rw-r--r-- | arch/sh/include/asm/processor_64.h | 48 |
1 files changed, 25 insertions, 23 deletions
diff --git a/arch/sh/include/asm/processor_64.h b/arch/sh/include/asm/processor_64.h index 5727d31b0cc..eedd4f625d0 100644 --- a/arch/sh/include/asm/processor_64.h +++ b/arch/sh/include/asm/processor_64.h @@ -17,7 +17,6 @@ #include <linux/compiler.h> #include <asm/page.h> #include <asm/types.h> -#include <asm/ptrace.h> #include <cpu/registers.h> /* @@ -48,7 +47,7 @@ pc; }) /* This decides where the kernel will search for a free chunk of vm * space during mmap's. */ -#define TASK_UNMAPPED_BASE (TASK_SIZE / 3) +#define TASK_UNMAPPED_BASE PAGE_ALIGN(TASK_SIZE / 3) /* * Bit of SR register @@ -87,26 +86,31 @@ struct sh_fpu_hard_struct { /* long status; * software status information */ }; -#if 0 /* Dummy fpu emulator */ struct sh_fpu_soft_struct { - unsigned long long fp_regs[32]; + unsigned long fp_regs[64]; 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. */ +union thread_xstate { + struct sh_fpu_hard_struct hardfpu; + struct sh_fpu_soft_struct softfpu; + /* + * The structure definitions only produce 32 bit alignment, yet we need + * to access them using 64 bit load/store as well. + */ unsigned long long alignment_dummy; }; struct thread_struct { unsigned long sp; unsigned long pc; + + /* Various thread flags, see SH_THREAD_xxx */ + unsigned long flags; + /* 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 @@ -117,12 +121,21 @@ struct thread_struct { 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; + union thread_xstate *xstate; + + /* + * fpu_counter contains the number of consecutive context switches + * that the FPU is used. If this is over a threshold, the lazy fpu + * saving becomes unlazy to save the trap. This is an unsigned char + * so that after 256 times the counter wraps and the behavior turns + * lazy again; this to deal with bursty apps that only use FPU for + * a short time + */ + unsigned char fpu_counter; }; #define INIT_MMAP \ @@ -134,10 +147,8 @@ struct thread_struct { .pc = 0, \ .kregs = &fake_swapper_regs, \ .uregs = NULL, \ - .trap_no = 0, \ - .error_code = 0, \ .address = 0, \ - .fpu = { { { 0, } }, } \ + .flags = 0, \ } /* @@ -146,7 +157,6 @@ struct thread_struct { #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 ! */ \ @@ -159,17 +169,11 @@ 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. */ @@ -226,7 +230,5 @@ 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)->regs[15]) - #endif /* __ASSEMBLY__ */ #endif /* __ASM_SH_PROCESSOR_64_H */ |