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| author | Robert Brose <linuxppcdev@lists.qbjnet.com> | 2008-03-29 07:20:23 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-04-01 20:43:09 +1100 |
| commit | a78bfbfcfaca64e6198f164c43a60afc8a50e2c6 (patch) | |
| tree | f388cf6887eadc96dfdd8c398096f8a91371bb20 | |
| parent | b163a256dac8ceb01d40bebe25c315768cf1877b (diff) | |
| download | linux-stable-a78bfbfcfaca64e6198f164c43a60afc8a50e2c6.tar.gz linux-stable-a78bfbfcfaca64e6198f164c43a60afc8a50e2c6.tar.bz2 linux-stable-a78bfbfcfaca64e6198f164c43a60afc8a50e2c6.zip | |
[POWERPC] Add kernel parameter to set l3cr for MPC745x
Old-world powermacs don't set L2CR or L3CR on processor upgrade cards.
This simple patch allows the setting of L3CR via a kernel parameter
(like the existing kernel parameter to set L2CR).
Signed-off-by: Robert Brose <bob@qbjnet.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
| -rw-r--r-- | Documentation/kernel-parameters.txt | 2 | ||||
| -rw-r--r-- | arch/powerpc/kernel/setup_32.c | 12 |
2 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 508e2a2c9864..a1ff28e0872b 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -931,6 +931,8 @@ and is between 256 and 4096 characters. It is defined in the file l2cr= [PPC] + l3cr= [PPC] + lapic [X86-32,APIC] Enable the local APIC even if BIOS disabled it. diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c index cd870a823d18..eac936eb3190 100644 --- a/arch/powerpc/kernel/setup_32.c +++ b/arch/powerpc/kernel/setup_32.c @@ -172,6 +172,18 @@ int __init ppc_setup_l2cr(char *str) } __setup("l2cr=", ppc_setup_l2cr); +/* Checks "l3cr=xxxx" command-line option */ +int __init ppc_setup_l3cr(char *str) +{ + if (cpu_has_feature(CPU_FTR_L3CR)) { + unsigned long val = simple_strtoul(str, NULL, 0); + printk(KERN_INFO "l3cr set to %lx\n", val); + _set_L3CR(val); /* and enable it */ + } + return 1; +} +__setup("l3cr=", ppc_setup_l3cr); + #ifdef CONFIG_GENERIC_NVRAM /* Generic nvram hooks used by drivers/char/gen_nvram.c */ |