diff options
Diffstat (limited to 'include/asm-ppc/processor.h')
| -rw-r--r-- | include/asm-ppc/processor.h | 91 |
1 files changed, 65 insertions, 26 deletions
diff --git a/include/asm-ppc/processor.h b/include/asm-ppc/processor.h index e14f2b270..ef797b4a7 100644 --- a/include/asm-ppc/processor.h +++ b/include/asm-ppc/processor.h @@ -5,8 +5,8 @@ * PowerPC machine specifics */ -#ifndef _PPC_MACHINE_H_ -#define _PPC_MACHINE_H_ +#define KERNEL_STACK_SIZE (4096) /* usable stack -- not buffers at either end */ +#define KERNEL_STACK_MASK (~(KERNEL_STACK_SIZE-1)) /* Bit encodings for Machine State Register (MSR) */ #define MSR_POW (1<<18) /* Enable Power Management */ @@ -26,8 +26,8 @@ #define MSR_RI (1<<1) /* Recoverable Exception */ #define MSR_LE (1<<0) /* Little-Endian enable */ -#define MSR_ MSR_FP|MSR_FE0|MSR_FE1|MSR_ME -#define MSR_USER MSR_|MSR_PR|MSR_EE|MSR_IR|MSR_DR +#define MSR_ MSR_FE0|MSR_FE1|MSR_ME|MSR_FP +#define MSR_USER MSR_FE0|MSR_FE1|MSR_ME|MSR_PR|MSR_EE|MSR_IR|MSR_DR /* Bit encodings for Hardware Implementation Register (HID0) */ #define HID0_EMCP (1<<31) /* Enable Machine Check pin */ @@ -47,15 +47,20 @@ #define HID0_DLOCK (1<<12) /* Data Cache Lock */ #define HID0_ICFI (1<<11) /* Instruction Cache Flash Invalidate */ #define HID0_DCI (1<<10) /* Data Cache Invalidate */ - -#endif +#define HID0_SIED (1<<7) /* Serial Instruction Execution [Disable] */ +#define HID0_BHTE (1<<2) /* Branch History Table Enable */ + +/* fpscr settings */ +#define FPSCR_FX (1<<31) +#define FPSCR_FEX (1<<30) -static inline void start_thread(struct pt_regs * regs, unsigned long eip, unsigned long esp) -{ - regs->nip = eip; - regs->gpr[1] = esp; - regs->msr = MSR_USER; -} + + +#ifndef __ASSEMBLY__ +/* + * PowerPC machine specifics + */ +extern inline void start_thread(struct pt_regs *, unsigned long, unsigned long ); /* @@ -69,7 +74,6 @@ static inline void start_thread(struct pt_regs * regs, unsigned long eip, unsign /* * Write Protection works right in supervisor mode on the PowerPC */ - #define wp_works_ok 1 #define wp_works_ok__is_a_macro /* for versions in ksyms.c */ @@ -81,28 +85,41 @@ static inline void start_thread(struct pt_regs * regs, unsigned long eip, unsign */ #define TASK_SIZE (0x80000000UL) +/* This decides where the kernel will search for a free chunk of vm + * space during mmap's. + */ +#define TASK_UNMAPPED_BASE (TASK_SIZE / 3) + struct thread_struct - { - unsigned long ksp; /* Kernel stack pointer */ - unsigned long *pg_tables; /* MMU information */ - unsigned long segs[16]; /* MMU Segment registers */ - unsigned long last_pc; /* PC when last entered system */ - unsigned long user_stack; /* [User] Stack when entered kernel */ - double fpr[32]; /* Complete floating point set */ - unsigned long wchan; /* Event task is sleeping on */ - unsigned long *regs; /* Pointer to saved register state */ - }; +{ + unsigned long ksp; /* Kernel stack pointer */ + unsigned long *pg_tables; /* MMU information */ + unsigned long segs[16]; /* MMU Segment registers */ + unsigned long last_pc; /* PC when last entered system */ + unsigned long user_stack; /* [User] Stack when entered kernel */ + double fpr[32]; /* Complete floating point set */ + unsigned long wchan; /* Event task is sleeping on */ + unsigned long *regs; /* Pointer to saved register state */ + unsigned long fp_used; /* number of quantums fp was used */ + unsigned long fs; /* for get_fs() validation */ + unsigned long expc; /* exception handler addr (see fault.c) */ + unsigned long excount; /* exception handler count */ +}; + #define INIT_TSS { \ + sizeof(init_kernel_stack) + (long) &init_kernel_stack,\ + (long *)swapper_pg_dir, {0}, \ 0, 0, {0}, \ - 0, 0, {0}, \ + 0, 0, 0, \ + KERNEL_DS, 0, 0 \ } #define INIT_MMAP { &init_mm, 0, 0x40000000, \ PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC } -#define alloc_kernel_stack() get_free_page(GFP_KERNEL) -#define free_kernel_stack(page) free_page((page)) +/* Free all resources held by a thread. */ +extern void release_thread(struct task_struct *); /* * Return saved PC of a blocked thread. For now, this is the "user" PC @@ -112,6 +129,28 @@ static inline unsigned long thread_saved_pc(struct thread_struct *t) return (t->last_pc); } +#define _PROC_Motorola 0 +#define _PROC_IBM 1 +#define _PROC_Be 2 + +int _Processor; + +/* Allocation and freeing of basic task resources. */ +#define alloc_task_struct() kmalloc(sizeof(struct task_struct), GFP_KERNEL) +#define free_task_struct(p) kfree(p) + +#ifdef KERNEL_STACK_BUFFER +/* give a 1 page buffer below the stack - if change then change ppc_machine.h */ +#define alloc_kernel_stack() \ + (memset((void *)__get_free_pages(GFP_KERNEL,1,0),0,KERNEL_STACK_SIZE+PAGE_SIZE)+PAGE_SIZE) +#define free_kernel_stack(page) free_pages((page)-PAGE_SIZE,1) +#else +#define alloc_kernel_stack() get_free_page(GFP_KERNEL) +#define free_kernel_stack(page) free_page((page)) +#endif + +#endif /* ASSEMBLY*/ + /* * Return_address is a replacement for __builtin_return_address(count) * which on certain architectures cannot reasonably be implemented in GCC |