diff options
| author | Ralf Baechle <ralf@linux-mips.org> | 2000-11-18 13:22:31 +0000 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2000-11-18 13:22:31 +0000 |
| commit | 32cc38229ac7538f2346918a09e75413e8861f87 (patch) | |
| tree | 2a33d3b83f807bf06c5c8ee8c383b532b1f8bef9 /arch | |
| parent | ef4c5609242bfc8742338fdafa867315ef44e2af (diff) | |
New configuration option CONFIG_MIPS_UNCACHED. Not yet selectable due
to the manuals documenting ll/sc operation as undefined for uncached
memory.
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/config.in | 1 | ||||
| -rw-r--r-- | arch/mips/mm/r4xx0.c | 4 |
2 files changed, 5 insertions, 0 deletions
diff --git a/arch/mips/config.in b/arch/mips/config.in index cd257bc33..5157bc52c 100644 --- a/arch/mips/config.in +++ b/arch/mips/config.in @@ -437,4 +437,5 @@ if [ "$CONFIG_SERIAL" = "y" ]; then bool 'Remote GDB kernel debugging' CONFIG_REMOTE_DEBUG fi bool 'Magic SysRq key' CONFIG_MAGIC_SYSRQ +#bool 'Run uncached' CONFIG_MIPS_UNCACHED endmenu diff --git a/arch/mips/mm/r4xx0.c b/arch/mips/mm/r4xx0.c index a255adad1..6f9718bea 100644 --- a/arch/mips/mm/r4xx0.c +++ b/arch/mips/mm/r4xx0.c @@ -2689,7 +2689,11 @@ void __init ld_mmu_r4xx0(void) printk("CPU revision is: %08x\n", read_32bit_cp0_register(CP0_PRID)); +#ifdef CONFIG_MIPS_UNCACHED + set_cp0_config(CONF_CM_CMASK, CONF_CM_UNCACHED); +#else set_cp0_config(CONF_CM_CMASK, CONF_CM_CACHABLE_NONCOHERENT); +#endif probe_icache(config); probe_dcache(config); |