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author | jeff <jeff@FreeBSD.org> | 2009-06-23 22:42:39 +0000 |
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committer | jeff <jeff@FreeBSD.org> | 2009-06-23 22:42:39 +0000 |
commit | 5bc3a65e406b90cd9e2a47b79117e453bdb56413 (patch) | |
tree | 5644c551dea0298e335cc77383345323c6eb3662 /sys/arm/sa11x0 | |
parent | d8bf8e1e8ad280542b4de90763d6d552c4f27b3a (diff) | |
download | FreeBSD-src-5bc3a65e406b90cd9e2a47b79117e453bdb56413.zip FreeBSD-src-5bc3a65e406b90cd9e2a47b79117e453bdb56413.tar.gz |
Implement a facility for dynamic per-cpu variables.
- Modules and kernel code alike may use DPCPU_DEFINE(),
DPCPU_GET(), DPCPU_SET(), etc. akin to the statically defined
PCPU_*. Requires only one extra instruction more than PCPU_* and is
virtually the same as __thread for builtin and much faster for shared
objects. DPCPU variables can be initialized when defined.
- Modules are supported by relocating the module's per-cpu linker set
over space reserved in the kernel. Modules may fail to load if there
is insufficient space available.
- Track space available for modules with a one-off extent allocator.
Free may block for memory to allocate space for an extent.
Reviewed by: jhb, rwatson, kan, sam, grehan, marius, marcel, stas
Diffstat (limited to 'sys/arm/sa11x0')
-rw-r--r-- | sys/arm/sa11x0/assabet_machdep.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sys/arm/sa11x0/assabet_machdep.c b/sys/arm/sa11x0/assabet_machdep.c index 71d71da..4fa6656 100644 --- a/sys/arm/sa11x0/assabet_machdep.c +++ b/sys/arm/sa11x0/assabet_machdep.c @@ -209,6 +209,7 @@ initarm(void *arg, void *arg2) struct pv_addr kernel_l1pt; struct pv_addr md_addr; struct pv_addr md_bla; + struct pv_addr dpcpu; int loop; u_int l1pagetable; vm_offset_t freemempos; @@ -268,6 +269,10 @@ initarm(void *arg, void *arg2) */ valloc_pages(systempage, 1); + /* Allocate dynamic per-cpu area. */ + valloc_pages(dpcpu, DPCPU_SIZE / PAGE_SIZE); + dpcpu_init((void *)dpcpu.pv_va, 0); + /* Allocate stacks for all modes */ valloc_pages(irqstack, IRQ_STACK_SIZE); valloc_pages(abtstack, ABT_STACK_SIZE); |