mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-25 16:40:52 +07:00
224 lines
6.5 KiB
C
224 lines
6.5 KiB
C
/* $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/a.out.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)
|
|
|
|
#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) */
|