processor.h
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- /* $Id: processor.h,v 1.80.2.1 2002/02/02 02:11:52 kanoj Exp $
- * include/asm-sparc64/processor.h
- *
- * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
- */
- #ifndef __ASM_SPARC64_PROCESSOR_H
- #define __ASM_SPARC64_PROCESSOR_H
- /*
- * Sparc64 implementation of macro that returns current
- * instruction pointer ("program counter").
- */
- #define current_text_addr() ({ void *pc; __asm__("rd %%pc, %0" : "=r" (pc)); pc; })
- #include <linux/config.h>
- #include <asm/asi.h>
- #include <asm/a.out.h>
- #include <asm/pstate.h>
- #include <asm/ptrace.h>
- #include <asm/signal.h>
- #include <asm/segment.h>
- #include <asm/page.h>
- #include <asm/delay.h>
- /* Bus types */
- #define EISA_bus 0
- #define EISA_bus__is_a_macro /* for versions in ksyms.c */
- #define MCA_bus 0
- #define MCA_bus__is_a_macro /* for versions in ksyms.c */
- /* 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 */
- /*
- * User lives in his very own context, and cannot reference us. Note
- * that TASK_SIZE is a misnomer, it really gives maximum user virtual
- * address that the kernel will allocate out.
- */
- #define VA_BITS 44
- #define VPTE_SIZE (1UL << (VA_BITS - PAGE_SHIFT + 3))
- #define TASK_SIZE ((unsigned long)-VPTE_SIZE)
- #ifndef __ASSEMBLY__
- #define NSWINS 7
- typedef struct {
- unsigned char seg;
- } mm_segment_t;
- /* The Sparc processor specific thread struct. */
- struct thread_struct {
- /* D$ line 1 */
- unsigned long ksp __attribute__ ((aligned(16)));
- unsigned char wstate, cwp, flags;
- mm_segment_t current_ds;
- unsigned char w_saved, fpdepth, fault_code, use_blkcommit;
- unsigned long fault_address;
- unsigned char fpsaved[7];
- unsigned char __pad2;
-
- /* D$ line 2, 3, 4 */
- struct pt_regs *kregs;
- unsigned long *utraps;
- unsigned long gsr[7];
- unsigned long xfsr[7];
- #ifdef CONFIG_DEBUG_SPINLOCK
- /* How many spinlocks held by this thread.
- * Used with spin lock debugging to catch tasks
- * sleeping illegally with locks held.
- */
- int smp_lock_count;
- unsigned int smp_lock_pc;
- #endif
- struct reg_window reg_window[NSWINS];
- unsigned long rwbuf_stkptrs[NSWINS];
-
- /* Performance counter state */
- u64 *user_cntd0, *user_cntd1;
- u64 kernel_cntd0, kernel_cntd1;
- u64 pcr_reg;
- };
- #endif /* !(__ASSEMBLY__) */
- #define SPARC_FLAG_UNALIGNED 0x01 /* is allowed to do unaligned accesses */
- #define SPARC_FLAG_NEWSIGNALS 0x02 /* task wants new-style signals */
- #define SPARC_FLAG_32BIT 0x04 /* task is older 32-bit binary */
- #define SPARC_FLAG_NEWCHILD 0x08 /* task is just-spawned child process */
- #define SPARC_FLAG_PERFCTR 0x10 /* task has performance counters active */
- #define FAULT_CODE_WRITE 0x01 /* Write access, implies D-TLB */
- #define FAULT_CODE_DTLB 0x02 /* Miss happened in D-TLB */
- #define FAULT_CODE_ITLB 0x04 /* Miss happened in I-TLB */
- #define FAULT_CODE_WINFIXUP 0x08 /* Miss happened during spill/fill */
- #ifndef CONFIG_DEBUG_SPINLOCK
- #define INIT_THREAD {
- /* ksp, wstate, cwp, flags, current_ds, */
- 0, 0, 0, 0, KERNEL_DS,
- /* w_saved, fpdepth, fault_code, use_blkcommit, */
- 0, 0, 0, 0,
- /* fault_address, fpsaved, __pad2, kregs, */
- 0, { 0 }, 0, 0,
- /* utraps, gsr, xfsr, */
- 0, { 0 }, { 0 },
- /* reg_window */
- { { { 0, }, { 0, } }, },
- /* rwbuf_stkptrs */
- { 0, 0, 0, 0, 0, 0, 0, },
- /* user_cntd0, user_cndd1, kernel_cntd0, kernel_cntd0, pcr_reg */
- 0, 0, 0, 0, 0,
- }
- #else /* CONFIG_DEBUG_SPINLOCK */
- #define INIT_THREAD {
- /* ksp, wstate, cwp, flags, current_ds, */
- 0, 0, 0, 0, KERNEL_DS,
- /* w_saved, fpdepth, fault_code, use_blkcommit, */
- 0, 0, 0, 0,
- /* fault_address, fpsaved, __pad2, kregs, */
- 0, { 0 }, 0, 0,
- /* utraps, gsr, xfsr, smp_lock_count, smp_lock_pc, */
- 0, { 0 }, { 0 }, 0, 0,
- /* reg_window */
- { { { 0, }, { 0, } }, },
- /* rwbuf_stkptrs */
- { 0, 0, 0, 0, 0, 0, 0, },
- /* user_cntd0, user_cndd1, kernel_cntd0, kernel_cntd0, pcr_reg */
- 0, 0, 0, 0, 0,
- }
- #endif /* !(CONFIG_DEBUG_SPINLOCK) */
- #ifdef __KERNEL__
- #if PAGE_SHIFT == 13
- #define THREAD_SIZE (2*PAGE_SIZE)
- #define THREAD_SHIFT (PAGE_SHIFT + 1)
- #else /* PAGE_SHIFT == 13 */
- #define THREAD_SIZE PAGE_SIZE
- #define THREAD_SHIFT PAGE_SHIFT
- #endif /* PAGE_SHIFT == 13 */
- #endif /* __KERNEL__ */
- #ifndef __ASSEMBLY__
- /* Return saved PC of a blocked thread. */
- extern __inline__ unsigned long thread_saved_pc(struct thread_struct *t)
- {
- unsigned long ret = 0xdeadbeefUL;
-
- if (t->ksp) {
- unsigned long *sp;
- sp = (unsigned long *)(t->ksp + STACK_BIAS);
- if (((unsigned long)sp & (sizeof(long) - 1)) == 0UL &&
- sp[14]) {
- unsigned long *fp;
- fp = (unsigned long *)(sp[14] + STACK_BIAS);
- if (((unsigned long)fp & (sizeof(long) - 1)) == 0UL)
- ret = fp[15];
- }
- }
- return ret;
- }
- /* On Uniprocessor, even in RMO processes see TSO semantics */
- #ifdef CONFIG_SMP
- #define TSTATE_INITIAL_MM TSTATE_TSO
- #else
- #define TSTATE_INITIAL_MM TSTATE_RMO
- #endif
- /* Do necessary setup to start up a newly executed thread. */
- #define start_thread(regs, pc, sp)
- do {
- regs->tstate = (regs->tstate & (TSTATE_CWP)) | (TSTATE_INITIAL_MM|TSTATE_IE) | (ASI_PNF << 24);
- regs->tpc = ((pc & (~3)) - 4);
- regs->tnpc = regs->tpc + 4;
- regs->y = 0;
- current->thread.wstate = (1 << 3);
- if (current->thread.utraps) {
- if (*(current->thread.utraps) < 2)
- kfree (current->thread.utraps);
- else
- (*(current->thread.utraps))--;
- current->thread.utraps = NULL;
- }
- __asm__ __volatile__(
- "stx %%g0, [%0 + %2 + 0x00]nt"
- "stx %%g0, [%0 + %2 + 0x08]nt"
- "stx %%g0, [%0 + %2 + 0x10]nt"
- "stx %%g0, [%0 + %2 + 0x18]nt"
- "stx %%g0, [%0 + %2 + 0x20]nt"
- "stx %%g0, [%0 + %2 + 0x28]nt"
- "stx %%g0, [%0 + %2 + 0x30]nt"
- "stx %%g0, [%0 + %2 + 0x38]nt"
- "stx %%g0, [%0 + %2 + 0x40]nt"
- "stx %%g0, [%0 + %2 + 0x48]nt"
- "stx %%g0, [%0 + %2 + 0x50]nt"
- "stx %%g0, [%0 + %2 + 0x58]nt"
- "stx %%g0, [%0 + %2 + 0x60]nt"
- "stx %%g0, [%0 + %2 + 0x68]nt"
- "stx %1, [%0 + %2 + 0x70]nt"
- "stx %%g0, [%0 + %2 + 0x78]nt"
- "wrpr %%g0, (1 << 3), %%wstatent"
- :
- : "r" (regs), "r" (sp - REGWIN_SZ - STACK_BIAS),
- "i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0])));
- } while(0)
- #define start_thread32(regs, pc, sp)
- do {
- pc &= 0x00000000ffffffffUL;
- sp &= 0x00000000ffffffffUL;
- regs->tstate = (regs->tstate & (TSTATE_CWP))|(TSTATE_INITIAL_MM|TSTATE_IE|TSTATE_AM);
- regs->tpc = ((pc & (~3)) - 4);
- regs->tnpc = regs->tpc + 4;
- regs->y = 0;
- current->thread.wstate = (2 << 3);
- if (current->thread.utraps) {
- if (*(current->thread.utraps) < 2)
- kfree (current->thread.utraps);
- else
- (*(current->thread.utraps))--;
- current->thread.utraps = NULL;
- }
- __asm__ __volatile__(
- "stx %%g0, [%0 + %2 + 0x00]nt"
- "stx %%g0, [%0 + %2 + 0x08]nt"
- "stx %%g0, [%0 + %2 + 0x10]nt"
- "stx %%g0, [%0 + %2 + 0x18]nt"
- "stx %%g0, [%0 + %2 + 0x20]nt"
- "stx %%g0, [%0 + %2 + 0x28]nt"
- "stx %%g0, [%0 + %2 + 0x30]nt"
- "stx %%g0, [%0 + %2 + 0x38]nt"
- "stx %%g0, [%0 + %2 + 0x40]nt"
- "stx %%g0, [%0 + %2 + 0x48]nt"
- "stx %%g0, [%0 + %2 + 0x50]nt"
- "stx %%g0, [%0 + %2 + 0x58]nt"
- "stx %%g0, [%0 + %2 + 0x60]nt"
- "stx %%g0, [%0 + %2 + 0x68]nt"
- "stx %1, [%0 + %2 + 0x70]nt"
- "stx %%g0, [%0 + %2 + 0x78]nt"
- "wrpr %%g0, (2 << 3), %%wstatent"
- :
- : "r" (regs), "r" (sp - REGWIN32_SZ),
- "i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0])));
- } while(0)
- /* Free all resources held by a thread. */
- #define release_thread(tsk) do { } while(0)
- extern pid_t kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
- #define copy_segments(tsk, mm) do { } while (0)
- #define release_segments(mm) do { } while (0)
- #define get_wchan(__TSK)
- ({ extern void scheduling_functions_start_here(void);
- extern void scheduling_functions_end_here(void);
- unsigned long pc, fp, bias = 0;
- unsigned long task_base = (unsigned long) (__TSK);
- struct reg_window *rw;
- unsigned long __ret = 0;
- int count = 0;
- if (!(__TSK) || (__TSK) == current ||
- (__TSK)->state == TASK_RUNNING)
- goto __out;
- bias = STACK_BIAS;
- fp = (__TSK)->thread.ksp + bias;
- do {
- /* Bogus frame pointer? */
- if (fp < (task_base + sizeof(struct task_struct)) ||
- fp >= (task_base + THREAD_SIZE))
- break;
- rw = (struct reg_window *) fp;
- pc = rw->ins[7];
- if (pc < ((unsigned long) scheduling_functions_start_here) ||
- pc >= ((unsigned long) scheduling_functions_end_here)) {
- __ret = pc;
- goto __out;
- }
- fp = rw->ins[6] + bias;
- } while (++count < 16);
- __out: __ret;
- })
- #define KSTK_EIP(tsk) ((tsk)->thread.kregs->tpc)
- #define KSTK_ESP(tsk) ((tsk)->thread.kregs->u_regs[UREG_FP])
- #ifdef __KERNEL__
- /* Allocation and freeing of task_struct and kernel stack. */
- #if PAGE_SHIFT == 13
- #define alloc_task_struct() ((struct task_struct *)__get_free_pages(GFP_KERNEL, 1))
- #define free_task_struct(tsk) free_pages((unsigned long)(tsk),1)
- #else /* PAGE_SHIFT == 13 */
- #define alloc_task_struct() ((struct task_struct *)__get_free_pages(GFP_KERNEL, 0))
- #define free_task_struct(tsk) free_pages((unsigned long)(tsk),0)
- #endif /* PAGE_SHIFT == 13 */
- #define get_task_struct(tsk) atomic_inc(&virt_to_page(tsk)->count)
- #define init_task (init_task_union.task)
- #define init_stack (init_task_union.stack)
- #define cpu_relax() udelay(1 + smp_processor_id())
- #endif /* __KERNEL__ */
- #endif /* !(__ASSEMBLY__) */
- #endif /* !(__ASM_SPARC64_PROCESSOR_H) */