| /* include/asm/processor.h |
| * |
| * Copyright (C) 1994 David S. Miller (davem@caip.rutgers.edu) |
| */ |
| |
| #ifndef __ASM_SPARC_PROCESSOR_H |
| #define __ASM_SPARC_PROCESSOR_H |
| |
| /* |
| * Sparc32 implementation of macro that returns current |
| * instruction pointer ("program counter"). |
| */ |
| #define current_text_addr() ({ void *pc; __asm__("sethi %%hi(1f), %0; or %0, %%lo(1f), %0;\n1:" : "=r" (pc)); pc; }) |
| |
| #include <asm/psr.h> |
| #include <asm/ptrace.h> |
| #include <asm/head.h> |
| #include <asm/signal.h> |
| #include <asm/page.h> |
| |
| /* |
| * The sparc has no problems with write protection |
| */ |
| #define wp_works_ok 1 |
| #define wp_works_ok__is_a_macro /* for versions in ksyms.c */ |
| |
| /* Whee, this is STACK_TOP + PAGE_SIZE and the lowest kernel address too... |
| * That one page is used to protect kernel from intruders, so that |
| * we can make our access_ok test faster |
| */ |
| #define TASK_SIZE PAGE_OFFSET |
| #ifdef __KERNEL__ |
| #define STACK_TOP (PAGE_OFFSET - PAGE_SIZE) |
| #define STACK_TOP_MAX STACK_TOP |
| #endif /* __KERNEL__ */ |
| |
| struct task_struct; |
| |
| #ifdef __KERNEL__ |
| struct fpq { |
| unsigned long *insn_addr; |
| unsigned long insn; |
| }; |
| #endif |
| |
| typedef struct { |
| int seg; |
| } mm_segment_t; |
| |
| /* The Sparc processor specific thread struct. */ |
| struct thread_struct { |
| struct pt_regs *kregs; |
| unsigned int _pad1; |
| |
| /* Special child fork kpsr/kwim values. */ |
| unsigned long fork_kpsr __attribute__ ((aligned (8))); |
| unsigned long fork_kwim; |
| |
| /* Floating point regs */ |
| unsigned long float_regs[32] __attribute__ ((aligned (8))); |
| unsigned long fsr; |
| unsigned long fpqdepth; |
| struct fpq fpqueue[16]; |
| unsigned long flags; |
| mm_segment_t current_ds; |
| }; |
| |
| #define SPARC_FLAG_KTHREAD 0x1 /* task is a kernel thread */ |
| #define SPARC_FLAG_UNALIGNED 0x2 /* is allowed to do unaligned accesses */ |
| |
| #define INIT_THREAD { \ |
| .flags = SPARC_FLAG_KTHREAD, \ |
| .current_ds = KERNEL_DS, \ |
| } |
| |
| /* Return saved PC of a blocked thread. */ |
| unsigned long thread_saved_pc(struct task_struct *t); |
| |
| /* Do necessary setup to start up a newly executed thread. */ |
| static inline void start_thread(struct pt_regs * regs, unsigned long pc, |
| unsigned long sp) |
| { |
| register unsigned long zero asm("g1"); |
| |
| regs->psr = (regs->psr & (PSR_CWP)) | PSR_S; |
| regs->pc = ((pc & (~3)) - 4); |
| regs->npc = regs->pc + 4; |
| regs->y = 0; |
| zero = 0; |
| __asm__ __volatile__("std\t%%g0, [%0 + %3 + 0x00]\n\t" |
| "std\t%%g0, [%0 + %3 + 0x08]\n\t" |
| "std\t%%g0, [%0 + %3 + 0x10]\n\t" |
| "std\t%%g0, [%0 + %3 + 0x18]\n\t" |
| "std\t%%g0, [%0 + %3 + 0x20]\n\t" |
| "std\t%%g0, [%0 + %3 + 0x28]\n\t" |
| "std\t%%g0, [%0 + %3 + 0x30]\n\t" |
| "st\t%1, [%0 + %3 + 0x38]\n\t" |
| "st\t%%g0, [%0 + %3 + 0x3c]" |
| : /* no outputs */ |
| : "r" (regs), |
| "r" (sp - sizeof(struct reg_window32)), |
| "r" (zero), |
| "i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0])) |
| : "memory"); |
| } |
| |
| /* Free all resources held by a thread. */ |
| #define release_thread(tsk) do { } while(0) |
| |
| unsigned long get_wchan(struct task_struct *); |
| |
| #define task_pt_regs(tsk) ((tsk)->thread.kregs) |
| #define KSTK_EIP(tsk) ((tsk)->thread.kregs->pc) |
| #define KSTK_ESP(tsk) ((tsk)->thread.kregs->u_regs[UREG_FP]) |
| |
| #ifdef __KERNEL__ |
| |
| extern struct task_struct *last_task_used_math; |
| int do_mathemu(struct pt_regs *regs, struct task_struct *fpt); |
| |
| #define cpu_relax() barrier() |
| extern void (*sparc_idle)(void); |
| |
| #endif |
| |
| #endif /* __ASM_SPARC_PROCESSOR_H */ |