-/* $Id: processor.h,v 1.83 2002/02/10 06:04:33 davem 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 <asm/asi.h>
-#include <asm/pstate.h>
-#include <asm/ptrace.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 */
-
-/*
- * 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.
- *
- * XXX No longer using virtual page tables, kill this upper limit...
- */
-#define VA_BITS 44
-#ifndef __ASSEMBLY__
-#define VPTE_SIZE (1UL << (VA_BITS - PAGE_SHIFT + 3))
-#else
-#define VPTE_SIZE (1 << (VA_BITS - PAGE_SHIFT + 3))
-#endif
-
-#define TASK_SIZE ((unsigned long)-VPTE_SIZE)
-#define TASK_SIZE_OF(tsk) \
- (test_tsk_thread_flag(tsk,TIF_32BIT) ? \
- (1UL << 32UL) : TASK_SIZE)
-#ifdef __KERNEL__
-
-#define STACK_TOP32 ((1UL << 32UL) - PAGE_SIZE)
-#define STACK_TOP64 (0x0000080000000000UL - (1UL << 32UL))
-
-#define STACK_TOP (test_thread_flag(TIF_32BIT) ? \
- STACK_TOP32 : STACK_TOP64)
-
-#define STACK_TOP_MAX STACK_TOP64
-
-#endif
-
-#ifndef __ASSEMBLY__
-
-typedef struct {
- unsigned char seg;
-} mm_segment_t;
-
-/* The Sparc processor specific thread struct. */
-/* XXX This should die, everything can go into thread_info now. */
-struct thread_struct {
-#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;
-#else
- int dummy; /* f'in gcc bug... */
-#endif
-};
-
-#endif /* !(__ASSEMBLY__) */
-
-#ifndef CONFIG_DEBUG_SPINLOCK
-#define INIT_THREAD { \
- 0, \
-}
-#else /* CONFIG_DEBUG_SPINLOCK */
-#define INIT_THREAD { \
-/* smp_lock_count, smp_lock_pc, */ \
- 0, 0, \
-}
-#endif /* !(CONFIG_DEBUG_SPINLOCK) */
-
-#ifndef __ASSEMBLY__
-
-#include <linux/types.h>
-
-/* Return saved PC of a blocked thread. */
-struct task_struct;
-extern unsigned long thread_saved_pc(struct task_struct *);
-
-/* 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 { \
- unsigned long __asi = ASI_PNF; \
- regs->tstate = (regs->tstate & (TSTATE_CWP)) | (TSTATE_INITIAL_MM|TSTATE_IE) | (__asi << 24UL); \
- regs->tpc = ((pc & (~3)) - 4); \
- regs->tnpc = regs->tpc + 4; \
- regs->y = 0; \
- set_thread_wstate(1 << 3); \
- if (current_thread_info()->utraps) { \
- if (*(current_thread_info()->utraps) < 2) \
- kfree(current_thread_info()->utraps); \
- else \
- (*(current_thread_info()->utraps))--; \
- current_thread_info()->utraps = NULL; \
- } \
- __asm__ __volatile__( \
- "stx %%g0, [%0 + %2 + 0x00]\n\t" \
- "stx %%g0, [%0 + %2 + 0x08]\n\t" \
- "stx %%g0, [%0 + %2 + 0x10]\n\t" \
- "stx %%g0, [%0 + %2 + 0x18]\n\t" \
- "stx %%g0, [%0 + %2 + 0x20]\n\t" \
- "stx %%g0, [%0 + %2 + 0x28]\n\t" \
- "stx %%g0, [%0 + %2 + 0x30]\n\t" \
- "stx %%g0, [%0 + %2 + 0x38]\n\t" \
- "stx %%g0, [%0 + %2 + 0x40]\n\t" \
- "stx %%g0, [%0 + %2 + 0x48]\n\t" \
- "stx %%g0, [%0 + %2 + 0x50]\n\t" \
- "stx %%g0, [%0 + %2 + 0x58]\n\t" \
- "stx %%g0, [%0 + %2 + 0x60]\n\t" \
- "stx %%g0, [%0 + %2 + 0x68]\n\t" \
- "stx %1, [%0 + %2 + 0x70]\n\t" \
- "stx %%g0, [%0 + %2 + 0x78]\n\t" \
- "wrpr %%g0, (1 << 3), %%wstate\n\t" \
- : \
- : "r" (regs), "r" (sp - sizeof(struct reg_window) - STACK_BIAS), \
- "i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))); \
-} while (0)
-
-#define start_thread32(regs, pc, sp) \
-do { \
- unsigned long __asi = ASI_PNF; \
- pc &= 0x00000000ffffffffUL; \
- sp &= 0x00000000ffffffffUL; \
- regs->tstate = (regs->tstate & (TSTATE_CWP))|(TSTATE_INITIAL_MM|TSTATE_IE|TSTATE_AM) | (__asi << 24UL); \
- regs->tpc = ((pc & (~3)) - 4); \
- regs->tnpc = regs->tpc + 4; \
- regs->y = 0; \
- set_thread_wstate(2 << 3); \
- if (current_thread_info()->utraps) { \
- if (*(current_thread_info()->utraps) < 2) \
- kfree(current_thread_info()->utraps); \
- else \
- (*(current_thread_info()->utraps))--; \
- current_thread_info()->utraps = NULL; \
- } \
- __asm__ __volatile__( \
- "stx %%g0, [%0 + %2 + 0x00]\n\t" \
- "stx %%g0, [%0 + %2 + 0x08]\n\t" \
- "stx %%g0, [%0 + %2 + 0x10]\n\t" \
- "stx %%g0, [%0 + %2 + 0x18]\n\t" \
- "stx %%g0, [%0 + %2 + 0x20]\n\t" \
- "stx %%g0, [%0 + %2 + 0x28]\n\t" \
- "stx %%g0, [%0 + %2 + 0x30]\n\t" \
- "stx %%g0, [%0 + %2 + 0x38]\n\t" \
- "stx %%g0, [%0 + %2 + 0x40]\n\t" \
- "stx %%g0, [%0 + %2 + 0x48]\n\t" \
- "stx %%g0, [%0 + %2 + 0x50]\n\t" \
- "stx %%g0, [%0 + %2 + 0x58]\n\t" \
- "stx %%g0, [%0 + %2 + 0x60]\n\t" \
- "stx %%g0, [%0 + %2 + 0x68]\n\t" \
- "stx %1, [%0 + %2 + 0x70]\n\t" \
- "stx %%g0, [%0 + %2 + 0x78]\n\t" \
- "wrpr %%g0, (2 << 3), %%wstate\n\t" \
- : \
- : "r" (regs), "r" (sp - sizeof(struct reg_window32)), \
- "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)
-
-/* Prepare to copy thread state - unlazy all lazy status */
-#define prepare_to_copy(tsk) do { } while (0)
-
-extern pid_t kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
-
-extern unsigned long get_wchan(struct task_struct *task);
-
-#define task_pt_regs(tsk) (task_thread_info(tsk)->kregs)
-#define KSTK_EIP(tsk) (task_pt_regs(tsk)->tpc)
-#define KSTK_ESP(tsk) (task_pt_regs(tsk)->u_regs[UREG_FP])
-
-#define cpu_relax() barrier()
-
-/* Prefetch support. This is tuned for UltraSPARC-III and later.
- * UltraSPARC-I will treat these as nops, and UltraSPARC-II has
- * a shallower prefetch queue than later chips.
- */
-#define ARCH_HAS_PREFETCH
-#define ARCH_HAS_PREFETCHW
-#define ARCH_HAS_SPINLOCK_PREFETCH
-
-static inline void prefetch(const void *x)
-{
- /* We do not use the read prefetch mnemonic because that
- * prefetches into the prefetch-cache which only is accessible
- * by floating point operations in UltraSPARC-III and later.
- * By contrast, "#one_write" prefetches into the L2 cache
- * in shared state.
- */
- __asm__ __volatile__("prefetch [%0], #one_write"
- : /* no outputs */
- : "r" (x));
-}
-
-static inline void prefetchw(const void *x)
-{
- /* The most optimal prefetch to use for writes is
- * "#n_writes". This brings the cacheline into the
- * L2 cache in "owned" state.
- */
- __asm__ __volatile__("prefetch [%0], #n_writes"
- : /* no outputs */
- : "r" (x));
-}
-
-#define spin_lock_prefetch(x) prefetchw(x)
-
-#define HAVE_ARCH_PICK_MMAP_LAYOUT
-
-#endif /* !(__ASSEMBLY__) */
-
-#endif /* !(__ASM_SPARC64_PROCESSOR_H) */
+#include <asm-sparc/processor.h>
git.openpandora.org / pandora-kernel.git / blobdiff