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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-05-26 01:01:26 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-05-26 01:01:26 (GMT) |
commit | bef9c558841604116704e10b3d9ff3dbf4939423 (patch) | |
tree | f5c58b6b0cfd2a92fb3b1d1f4cbfdfb3df6f45d6 /arch | |
parent | 3db602bdcd52d8b7523cfb4fb705cea84dbe1617 (diff) | |
parent | 4b463f785837f73bdd88ae3821bb7b69599010c9 (diff) | |
download | linux-fsl-qoriq-bef9c558841604116704e10b3d9ff3dbf4939423.tar.xz |
Merge of rsync://rsync.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
Diffstat (limited to 'arch')
-rw-r--r-- | arch/sparc64/kernel/setup.c | 11 | ||||
-rw-r--r-- | arch/sparc64/kernel/smp.c | 3 | ||||
-rw-r--r-- | arch/sparc64/kernel/traps.c | 19 |
3 files changed, 33 insertions, 0 deletions
diff --git a/arch/sparc64/kernel/setup.c b/arch/sparc64/kernel/setup.c index 12c3d84b..b7e6a91 100644 --- a/arch/sparc64/kernel/setup.c +++ b/arch/sparc64/kernel/setup.c @@ -383,6 +383,17 @@ static void __init process_switch(char c) /* Use PROM debug console. */ register_console(&prom_debug_console); break; + case 'P': + /* Force UltraSPARC-III P-Cache on. */ + if (tlb_type != cheetah) { + printk("BOOT: Ignoring P-Cache force option.\n"); + break; + } + cheetah_pcache_forced_on = 1; + add_taint(TAINT_MACHINE_CHECK); + cheetah_enable_pcache(); + break; + default: printk("Unknown boot switch (-%c)\n", c); break; diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c index 6dff06a..e5b9c7a 100644 --- a/arch/sparc64/kernel/smp.c +++ b/arch/sparc64/kernel/smp.c @@ -123,6 +123,9 @@ void __init smp_callin(void) smp_setup_percpu_timer(); + if (cheetah_pcache_forced_on) + cheetah_enable_pcache(); + local_irq_enable(); calibrate_delay(); diff --git a/arch/sparc64/kernel/traps.c b/arch/sparc64/kernel/traps.c index 56b203a..a9f4596 100644 --- a/arch/sparc64/kernel/traps.c +++ b/arch/sparc64/kernel/traps.c @@ -421,6 +421,25 @@ asmlinkage void cee_log(unsigned long ce_status, } } +int cheetah_pcache_forced_on; + +void cheetah_enable_pcache(void) +{ + unsigned long dcr; + + printk("CHEETAH: Enabling P-Cache on cpu %d.\n", + smp_processor_id()); + + __asm__ __volatile__("ldxa [%%g0] %1, %0" + : "=r" (dcr) + : "i" (ASI_DCU_CONTROL_REG)); + dcr |= (DCU_PE | DCU_HPE | DCU_SPE | DCU_SL); + __asm__ __volatile__("stxa %0, [%%g0] %1\n\t" + "membar #Sync" + : /* no outputs */ + : "r" (dcr), "i" (ASI_DCU_CONTROL_REG)); +} + /* Cheetah error trap handling. */ static unsigned long ecache_flush_physbase; static unsigned long ecache_flush_linesize; |