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| author | Atsushi Nemoto <anemo@mba.ocn.ne.jp> | 2006-03-17 12:59:22 +0900 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2006-03-21 13:27:47 +0000 |
| commit | de862b488e81172d4c610945efd9f3fc7f4b84a7 (patch) | |
| tree | 677cde48279d65350e9dc2bb92204c2efd59b11a | |
| parent | c6281edb1d5e307f056fff0e174f60fa6133adc5 (diff) | |
| download | blackbird-op-linux-de862b488e81172d4c610945efd9f3fc7f4b84a7.tar.gz blackbird-op-linux-de862b488e81172d4c610945efd9f3fc7f4b84a7.zip | |
[MIPS] TX49XX has prefetch.
The TX49XX has the prefetch instruction. It supports only Pref_Load
(hint 0). Actually changes in this patch except for Kconfig are not
have any effects, I added these changes to prevent misuse of unsupported
hints.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| -rw-r--r-- | arch/mips/Kconfig | 1 | ||||
| -rw-r--r-- | arch/mips/mm/c-r4k.c | 1 | ||||
| -rw-r--r-- | arch/mips/mm/pg-r4k.c | 10 |
3 files changed, 10 insertions, 2 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 97a9769a9046..ac2012f033d6 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -1160,6 +1160,7 @@ config CPU_R4X00 config CPU_TX49XX bool "R49XX" depends on SYS_HAS_CPU_TX49XX + select CPU_HAS_PREFETCH select CPU_SUPPORTS_32BIT_KERNEL select CPU_SUPPORTS_64BIT_KERNEL diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c index 9572ed44f0d5..32b7f6aeb983 100644 --- a/arch/mips/mm/c-r4k.c +++ b/arch/mips/mm/c-r4k.c @@ -786,6 +786,7 @@ static void __init probe_pcache(void) c->dcache.waybit = 0; c->options |= MIPS_CPU_CACHE_CDEX_P; + c->options |= MIPS_CPU_PREFETCH; break; case CPU_R4000PC: diff --git a/arch/mips/mm/pg-r4k.c b/arch/mips/mm/pg-r4k.c index f51e180072e3..e4390dc3eb48 100644 --- a/arch/mips/mm/pg-r4k.c +++ b/arch/mips/mm/pg-r4k.c @@ -124,7 +124,7 @@ static inline void build_nop(void) static inline void build_src_pref(int advance) { - if (!(load_offset & (cpu_dcache_line_size() - 1))) { + if (!(load_offset & (cpu_dcache_line_size() - 1)) && advance) { union mips_instruction mi; mi.i_format.opcode = pref_op; @@ -166,7 +166,7 @@ static inline void build_load_reg(int reg) static inline void build_dst_pref(int advance) { - if (!(store_offset & (cpu_dcache_line_size() - 1))) { + if (!(store_offset & (cpu_dcache_line_size() - 1)) && advance) { union mips_instruction mi; mi.i_format.opcode = pref_op; @@ -340,6 +340,12 @@ void __init build_clear_page(void) if (cpu_has_prefetch) { switch (current_cpu_data.cputype) { + case CPU_TX49XX: + /* TX49 supports only Pref_Load */ + pref_offset_clear = 0; + pref_offset_copy = 0; + break; + case CPU_RM9000: /* * As a workaround for erratum G105 which make the |
