diff options
| author | Atsushi Nemoto <anemo@mba.ocn.ne.jp> | 2006-09-11 17:50:29 +0900 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2006-11-30 01:14:44 +0000 |
| commit | 5b10496b6e6577f65b032a5c4c97d0d3a841273c (patch) | |
| tree | 996de253070623043619f893afe8aa244ae88e8a /arch/mips/kernel/traps.c | |
| parent | 656be92f9ae194ed62bc81310a4589a7cd765f13 (diff) | |
[MIPS] Fast path for rdhwr emulation for TLS
Add special short path for emulationg RDHWR which is used to support TLS.
Add an extra prologue for cpu_has_vtag_icache case.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/traps.c')
| -rw-r--r-- | arch/mips/kernel/traps.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c index 9fda1b8be3a..6eccfb49ae6 100644 --- a/arch/mips/kernel/traps.c +++ b/arch/mips/kernel/traps.c @@ -54,6 +54,8 @@ extern asmlinkage void handle_dbe(void); extern asmlinkage void handle_sys(void); extern asmlinkage void handle_bp(void); extern asmlinkage void handle_ri(void); +extern asmlinkage void handle_ri_rdhwr_vivt(void); +extern asmlinkage void handle_ri_rdhwr(void); extern asmlinkage void handle_cpu(void); extern asmlinkage void handle_ov(void); extern asmlinkage void handle_tr(void); @@ -1423,6 +1425,15 @@ void __init set_uncached_handler (unsigned long offset, void *addr, unsigned lon memcpy((void *)(uncached_ebase + offset), addr, size); } +static int __initdata rdhwr_noopt; +static int __init set_rdhwr_noopt(char *str) +{ + rdhwr_noopt = 1; + return 1; +} + +__setup("rdhwr_noopt", set_rdhwr_noopt); + void __init trap_init(void) { extern char except_vec3_generic, except_vec3_r4000; @@ -1502,7 +1513,9 @@ void __init trap_init(void) set_except_vector(8, handle_sys); set_except_vector(9, handle_bp); - set_except_vector(10, handle_ri); + set_except_vector(10, rdhwr_noopt ? handle_ri : + (cpu_has_vtag_icache ? + handle_ri_rdhwr_vivt : handle_ri_rdhwr)); set_except_vector(11, handle_cpu); set_except_vector(12, handle_ov); set_except_vector(13, handle_tr); |