diff options
author | Ralf Baechle <ralf@linux-mips.org> | 1999-08-18 23:37:42 +0000 |
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committer | Ralf Baechle <ralf@linux-mips.org> | 1999-08-18 23:37:42 +0000 |
commit | 794ff4dc959a8dfef4f704ef6a5bb7334e421623 (patch) | |
tree | 9ea4d7f31e69420a29819a7e4c88e4097aa4380f /include/asm-mips64/system.h | |
parent | 8b92ed51419c907aa453c063b0afaefaef268c02 (diff) |
- Drop support for 32/32 fp register model
- Fix siginfo structure definition
- Ptrace fixes, one of them was an uninitialized pointer.
- Header file fixes.
- Fixes to linker scripts required for new binutils.
- MIPS64. Chainsaw edition.
Btw, Harald, why does the kernel no longer compile ...
Diffstat (limited to 'include/asm-mips64/system.h')
-rw-r--r-- | include/asm-mips64/system.h | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/include/asm-mips64/system.h b/include/asm-mips64/system.h new file mode 100644 index 000000000..320b9ceeb --- /dev/null +++ b/include/asm-mips64/system.h @@ -0,0 +1,218 @@ +/* $Id$ + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999 by Ralf Baechle + * Modified further for R[236]000 by Paul M. Antoine, 1996 + * Copyright (C) 1999 Silicon Graphics + */ +#ifndef _ASM_SYSTEM_H +#define _ASM_SYSTEM_H + +#include <asm/sgidefs.h> +#include <linux/kernel.h> + +extern __inline__ void +__sti(void) +{ + __asm__ __volatile__( + ".set\tnoreorder\n\t" + ".set\tnoat\n\t" + "mfc0\t$1,$12\n\t" + "ori\t$1,0x1f\n\t" + "xori\t$1,0x1e\n\t" + "mtc0\t$1,$12\n\t" + ".set\tat\n\t" + ".set\treorder" + : /* no outputs */ + : /* no inputs */ + : "$1", "memory"); +} + +/* + * For cli() we have to insert nops to make shure that the new value + * has actually arrived in the status register before the end of this + * macro. + * R4000/R4400 need three nops, the R4600 two nops and the R10000 needs + * no nops at all. + */ +extern __inline__ void +__cli(void) +{ + __asm__ __volatile__( + ".set\tnoreorder\n\t" + ".set\tnoat\n\t" + "mfc0\t$1,$12\n\t" + "ori\t$1,1\n\t" + "xori\t$1,1\n\t" + "mtc0\t$1,$12\n\t" + "nop\n\t" + "nop\n\t" + "nop\n\t" + ".set\tat\n\t" + ".set\treorder" + : /* no outputs */ + : /* no inputs */ + : "$1", "memory"); +} + +#define __save_flags(x) \ +__asm__ __volatile__( \ + ".set\tnoreorder\n\t" \ + "mfc0\t%0,$12\n\t" \ + ".set\treorder" \ + : "=r" (x) \ + : /* no inputs */ \ + : "memory") + +#define __save_and_cli(x) \ +__asm__ __volatile__( \ + ".set\tnoreorder\n\t" \ + ".set\tnoat\n\t" \ + "mfc0\t%0,$12\n\t" \ + "ori\t$1,%0,1\n\t" \ + "xori\t$1,1\n\t" \ + "mtc0\t$1,$12\n\t" \ + "nop\n\t" \ + "nop\n\t" \ + "nop\n\t" \ + ".set\tat\n\t" \ + ".set\treorder" \ + : "=r" (x) \ + : /* no inputs */ \ + : "$1", "memory") + +extern void __inline__ +__restore_flags(int flags) +{ + __asm__ __volatile__( + ".set\tnoreorder\n\t" + "mfc0\t$8,$12\n\t" + "li\t$9,0xff00\n\t" + "and\t$8,$9\n\t" + "nor\t$9,$0,$9\n\t" + "and\t%0,$9\n\t" + "or\t%0,$8\n\t" + "mtc0\t%0,$12\n\t" + "nop\n\t" + "nop\n\t" + "nop\n\t" + ".set\treorder" + : /* no output */ + : "r" (flags) + : "$8", "$9", "memory"); +} + +/* + * Non-SMP versions ... + */ +#define sti() __sti() +#define cli() __cli() +#define save_flags(x) __save_flags(x) +#define save_and_cli(x) __save_and_cli(x) +#define restore_flags(x) __restore_flags(x) + +/* For spinlocks etc */ +#define local_irq_save(x) __save_flags(x); +#define local_irq_restore(x) __restore_flags(x); +#define local_irq_disable() __cli(); +#define local_irq_enable() __sti(); + +/* + * These are probably defined overly paranoid ... + */ +#define mb() \ +__asm__ __volatile__( \ + "# prevent instructions being moved around\n\t" \ + ".set\tnoreorder\n\t" \ + "# 8 nops to fool the R4400 pipeline\n\t" \ + "nop;nop;nop;nop;nop;nop;nop;nop\n\t" \ + ".set\treorder" \ + : /* no output */ \ + : /* no input */ \ + : "memory") +#define rmb() mb() +#define wmb() mb() + +#if !defined (_LANGUAGE_ASSEMBLY) +/* + * switch_to(n) should switch tasks to task nr n, first + * checking that n isn't the current task, in which case it does nothing. + */ +extern asmlinkage void *(*resume)(void *last, void *next); +#endif /* !defined (_LANGUAGE_ASSEMBLY) */ + +#define switch_to(prev,next,last) \ +do { \ + (last) = resume(prev, next); \ +} while(0) + +extern __inline__ unsigned long xchg_u32(volatile int * m, unsigned long val) +{ + unsigned long dummy; + + __asm__ __volatile__( + ".set\tnoreorder\n\t" + ".set\tnoat\n\t" + "ll\t%0,(%1)\n" + "1:\tmove\t$1,%2\n\t" + "sc\t$1,(%1)\n\t" + "beqzl\t$1,1b\n\t" + "ll\t%0,(%1)\n\t" + ".set\tat\n\t" + ".set\treorder" + : "=r" (val), "=r" (m), "=r" (dummy) + : "1" (m), "2" (val) + : "memory"); + + return val; +} + +/* + * Only used for 64 bit kernel. + */ +extern __inline__ unsigned long xchg_u64(volatile long * m, unsigned long val) +{ + unsigned long dummy; + + __asm__ __volatile__( + ".set\tnoreorder\n\t" + ".set\tnoat\n\t" + "lld\t%0,(%1)\n" + "1:\tmove\t$1,%2\n\t" + "scd\t$1,(%1)\n\t" + "beqzl\t$1,1b\n\t" + "ll\t%0,(%1)\n\t" + ".set\tat\n\t" + ".set\treorder" + : "=r" (val), "=r" (m), "=r" (dummy) + : "1" (m), "2" (val) + : "memory"); + + return val; +} + +#define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr)))) +#define tas(ptr) (xchg((ptr),1)) + +/* This function doesn't exist, so you'll get a linker error if something + tries to do an invalid xchg(). */ +extern void __xchg_called_with_bad_pointer(void); + +static __inline__ unsigned long __xchg(unsigned long x, volatile void * ptr, int size) +{ + switch (size) { + case 4: + return xchg_u32(ptr, x); + case 8: + return xchg_u64(ptr, x); + } + __xchg_called_with_bad_pointer(); + return x; +} + +extern void set_except_vector(int n, void *addr); + +#endif /* _ASM_SYSTEM_H */ |