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| author |   Bernd Schmidt <bernd.schmidt@analog.com> | 2008-01-27 18:39:16 +0800 |
|---|---|---|
| committer |   Bryan Wu <bryan.wu@analog.com> | 2008-01-27 18:39:16 +0800 |
| commit | b97b8a998397e8c64699559099fa9febffae2b4d (patch) | |
| tree | 689188b6336cf45b4391f5bc764878e342b9ac90 /arch/blackfin/kernel/setup.c | |
| parent | [Blackfin] arch: set_bfin_dma_config shouldnt set SYNC or RESTART by default - add argument or option (diff) | |
| download | linux-dev-b97b8a998397e8c64699559099fa9febffae2b4d.tar.xz linux-dev-b97b8a998397e8c64699559099fa9febffae2b4d.zip | |
[Blackfin] arch: Initial checkin of the memory protection support.
Enable it with CONFIG_MPU.
Signed-off-by: Bernd Schmidt <bernd.schmidt@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Diffstat (limited to 'arch/blackfin/kernel/setup.c')
| -rw-r--r-- | arch/blackfin/kernel/setup.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c index a03c2dfff4a3..1a942a721d51 100644 --- a/arch/blackfin/kernel/setup.c +++ b/arch/blackfin/kernel/setup.c @@ -238,7 +238,12 @@ void __init setup_arch(char **cmdline_p) memory_end = _ramend - DMA_UNCACHED_REGION; _ramstart = (unsigned long)__bss_stop; +#ifdef CONFIG_MPU + /* Round up to multiple of 4MB. */ + memory_start = (_ramstart + 0x3fffff) & ~0x3fffff; +#else memory_start = PAGE_ALIGN(_ramstart); +#endif #if defined(CONFIG_MTD_UCLINUX) /* generic memory mapped MTD driver */ @@ -307,6 +312,11 @@ void __init setup_arch(char **cmdline_p) printk(KERN_NOTICE "Warning: limiting memory to %liMB due to hardware anomaly 05000263\n", memory_end >> 20); #endif /* ANOMALY_05000263 */ +#ifdef CONFIG_MPU + page_mask_nelts = ((_ramend >> PAGE_SHIFT) + 31) / 32; + page_mask_order = get_order(3 * page_mask_nelts * sizeof(long)); +#endif + #if !defined(CONFIG_MTD_UCLINUX) memory_end -= SIZE_4K; /*In case there is no valid CPLB behind memory_end make sure we don't get to close*/ #endif |