diff options
| author | Ralf Baechle <ralf@linux-mips.org> | 2007-07-10 17:33:02 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2007-07-10 17:33:02 +0100 |
| commit | a36920200c5b89d56120a5e839fe4a603d51b16c (patch) | |
| tree | aefb1fc4b0792ef788024fa596954a5689f15d0a /include/asm-mips | |
| parent | d223a86154f8c66f5a380b17e1c8091d56f47cf8 (diff) | |
[MIPS] Enable support for the userlocal hardware register
Which will cut down the cost of RDHWR $29 which is used to obtain the
TLS pointer and so far being emulated in software down to a single cycle
operation.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'include/asm-mips')
| -rw-r--r-- | include/asm-mips/cpu-features.h | 4 | ||||
| -rw-r--r-- | include/asm-mips/cpu.h | 1 | ||||
| -rw-r--r-- | include/asm-mips/mipsregs.h | 6 | ||||
| -rw-r--r-- | include/asm-mips/system.h | 2 |
4 files changed, 12 insertions, 1 deletions
diff --git a/include/asm-mips/cpu-features.h b/include/asm-mips/cpu-features.h index 5e4bed123b48..d95a83e3e1d7 100644 --- a/include/asm-mips/cpu-features.h +++ b/include/asm-mips/cpu-features.h @@ -150,6 +150,10 @@ #define cpu_has_mipsmt (cpu_data[0].ases & MIPS_ASE_MIPSMT) #endif +#ifndef cpu_has_userlocal +#define cpu_has_userlocal (cpu_data[0].options & MIPS_CPU_ULRI) +#endif + #ifdef CONFIG_32BIT # ifndef cpu_has_nofpuex # define cpu_has_nofpuex (cpu_data[0].options & MIPS_CPU_NOFPUEX) diff --git a/include/asm-mips/cpu.h b/include/asm-mips/cpu.h index 2924069075e0..49c1f0011863 100644 --- a/include/asm-mips/cpu.h +++ b/include/asm-mips/cpu.h @@ -257,6 +257,7 @@ #define MIPS_CPU_PREFETCH 0x00080000 /* CPU has usable prefetch */ #define MIPS_CPU_VINT 0x00100000 /* CPU supports MIPSR2 vectored interrupts */ #define MIPS_CPU_VEIC 0x00200000 /* CPU supports MIPSR2 external interrupt controller mode */ +#define MIPS_CPU_ULRI 0x00400000 /* CPU has ULRI feature */ /* * CPU ASE encodings diff --git a/include/asm-mips/mipsregs.h b/include/asm-mips/mipsregs.h index 89c81922d47c..668db02c2804 100644 --- a/include/asm-mips/mipsregs.h +++ b/include/asm-mips/mipsregs.h @@ -7,7 +7,7 @@ * Copyright (C) 2000 Silicon Graphics, Inc. * Modified for further R[236]000 support by Paul M. Antoine, 1996. * Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com - * Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved. + * Copyright (C) 2000, 07 MIPS Technologies, Inc. * Copyright (C) 2003, 2004 Maciej W. Rozycki */ #ifndef _ASM_MIPSREGS_H @@ -533,6 +533,7 @@ #define MIPS_CONF3_VEIC (_ULCAST_(1) << 6) #define MIPS_CONF3_LPA (_ULCAST_(1) << 7) #define MIPS_CONF3_DSP (_ULCAST_(1) << 10) +#define MIPS_CONF3_ULRI (_ULCAST_(1) << 13) #define MIPS_CONF7_WII (_ULCAST_(1) << 31) @@ -772,6 +773,9 @@ do { \ #define read_c0_context() __read_ulong_c0_register($4, 0) #define write_c0_context(val) __write_ulong_c0_register($4, 0, val) +#define read_c0_userlocal() __read_ulong_c0_register($4, 2) +#define write_c0_userlocal(val) __write_ulong_c0_register($4, 2, val) + #define read_c0_pagemask() __read_32bit_c0_register($5, 0) #define write_c0_pagemask(val) __write_32bit_c0_register($5, 0, val) diff --git a/include/asm-mips/system.h b/include/asm-mips/system.h index 9b3a8dd2c3db..be64fc55562a 100644 --- a/include/asm-mips/system.h +++ b/include/asm-mips/system.h @@ -67,6 +67,8 @@ do { \ (last) = resume(prev, next, task_thread_info(next)); \ if (cpu_has_dsp) \ __restore_dsp(current); \ + if (cpu_has_userlocal) \ + write_c0_userlocal(task_thread_info(current)->tp_value);\ } while(0) /* |