diff options
| author | Ralf Baechle <ralf@linux-mips.org> | 1998-07-16 19:10:01 +0000 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 1998-07-16 19:10:01 +0000 |
| commit | 1ace72167d23543960d517e3d444762cb92bd211 (patch) | |
| tree | c5d5aaf9501edcc48dc8dfdca9ed694d0d26763f /include/asm-mips | |
| parent | cb9368e29107fdf541cb68499a04f67949c131c5 (diff) | |
- Reformat ptrace.c for readability.
- Handle lazy fpu context switches correctly for ptrace(2).
- Don't read $fcr31 on context switch, it's pure bloat.
- New processes get $fcr31 initialized to no exceptions.
- First beginnings of floating point support kernel code. For now we
only can handle cvt.w.s and cvt.w.d instructions where the source
register is a NaN, infinity or denorm. This is good enough to get
Mozilla up.
- Don't send SIGFPE on every floating point instruction we don't know
how to handle, rather just complain.
- Cleanup headerfile inclusions in the HPC3 code.
- Fix the definition of PAGE_NONE.
Diffstat (limited to 'include/asm-mips')
| -rw-r--r-- | include/asm-mips/fp.h | 30 | ||||
| -rw-r--r-- | include/asm-mips/pgtable.h | 10 |
2 files changed, 39 insertions, 1 deletions
diff --git a/include/asm-mips/fp.h b/include/asm-mips/fp.h new file mode 100644 index 000000000..463478147 --- /dev/null +++ b/include/asm-mips/fp.h @@ -0,0 +1,30 @@ +/* $Id: fp.h,v 1.1 1998/07/16 17:01:54 ralf Exp $ + * + * 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) 1998 by Ralf Baechle + */ + +/* + * Activate and deactive the floatingpoint accelerator. + */ +#define enable_cp1() \ + __asm__ __volatile__( \ + ".set\tnoat\n\t" \ + "mfc0\t$1,$12\n\t" \ + "or\t$1,%0\n\t" \ + "mtc0\t$1,$12\n\t" \ + ".set\tat" \ + : : "r" (ST0_CU1)); + +#define disable_cp1() \ + __asm__ __volatile__( \ + ".set\tnoat\n\t" \ + "mfc0\t$1,$12\n\t" \ + "or\t$1,%0\n\t" \ + "xor\t$1,%0\n\t" \ + "mtc0\t$1,$12\n\t" \ + ".set\tat" \ + : : "r" (ST0_CU1)); diff --git a/include/asm-mips/pgtable.h b/include/asm-mips/pgtable.h index 02ec7ef51..e84692a40 100644 --- a/include/asm-mips/pgtable.h +++ b/include/asm-mips/pgtable.h @@ -1,3 +1,11 @@ +/* $Id: pgtable.h,v 1.11 1998/07/14 09:31:48 ralf Exp $ + * + * 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 - 1998 by Ralf Baechle at alii + */ #ifndef __ASM_MIPS_PGTABLE_H #define __ASM_MIPS_PGTABLE_H @@ -121,7 +129,7 @@ extern void (*add_wired_entry)(unsigned long entrylo0, unsigned long entrylo1, #define _PAGE_CHG_MASK (PAGE_MASK | __READABLE | __WRITEABLE | _CACHE_MASK) -#define PAGE_NONE __pgprot(0) +#define PAGE_NONE __pgprot(_PAGE_PRESENT | _CACHE_CACHABLE_NONCOHERENT) #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \ _CACHE_CACHABLE_NONCOHERENT) #define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_READ | \ |