diff options
| author | jeff <jeff@FreeBSD.org> | 2009-06-23 22:42:39 +0000 |
|---|---|---|
| committer | jeff <jeff@FreeBSD.org> | 2009-06-23 22:42:39 +0000 |
| commit | 5bc3a65e406b90cd9e2a47b79117e453bdb56413 (patch) | |
| tree | 5644c551dea0298e335cc77383345323c6eb3662 /sys/powerpc/aim | |
| 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/powerpc/aim')
| -rw-r--r-- | sys/powerpc/aim/mmu_oea.c | 15 | ||||
| -rw-r--r-- | sys/powerpc/aim/mmu_oea64.c | 15 |
2 files changed, 30 insertions, 0 deletions
diff --git a/sys/powerpc/aim/mmu_oea.c b/sys/powerpc/aim/mmu_oea.c index 7eb4beb..bbf2e04 100644 --- a/sys/powerpc/aim/mmu_oea.c +++ b/sys/powerpc/aim/mmu_oea.c @@ -669,6 +669,7 @@ moea_bootstrap(mmu_t mmup, vm_offset_t kernelstart, vm_offset_t kernelend) int ofw_mappings; vm_size_t size, physsz, hwphyssz; vm_offset_t pa, va, off; + void *dpcpu; /* * Set up BAT0 to map the lowest 256 MB area @@ -938,6 +939,20 @@ moea_bootstrap(mmu_t mmup, vm_offset_t kernelstart, vm_offset_t kernelend) pa += PAGE_SIZE; va += PAGE_SIZE; } + + /* + * Allocate virtual address space for the dynamic percpu area. + */ + pa = moea_bootstrap_alloc(DPCPU_SIZE, PAGE_SIZE); + dpcpu = (void *)virtual_avail; + va = virtual_avail; + virtual_avail += DPCPU_SIZE; + while (va < virtual_avail) { + moea_kenter(mmup, va, pa);; + pa += PAGE_SIZE; + va += PAGE_SIZE; + } + dpcpu_init(dpcpu, 0); } /* diff --git a/sys/powerpc/aim/mmu_oea64.c b/sys/powerpc/aim/mmu_oea64.c index 4590363..9f28332 100644 --- a/sys/powerpc/aim/mmu_oea64.c +++ b/sys/powerpc/aim/mmu_oea64.c @@ -726,6 +726,7 @@ moea64_bridge_bootstrap(mmu_t mmup, vm_offset_t kernelstart, vm_offset_t kernele vm_size_t size, physsz, hwphyssz; vm_offset_t pa, va, off; uint32_t msr; + void *dpcpu; /* We don't have a direct map since there is no BAT */ hw_direct_map = 0; @@ -1027,6 +1028,20 @@ moea64_bridge_bootstrap(mmu_t mmup, vm_offset_t kernelstart, vm_offset_t kernele pa += PAGE_SIZE; va += PAGE_SIZE; } + + /* + * Allocate virtual address space for the dynamic percpu area. + */ + pa = moea64_bootstrap_alloc(DPCPU_SIZE, PAGE_SIZE); + dpcpu = (void *)virtual_avail; + va = virtual_avail; + virtual_avail += DPCPU_SIZE; + while (va < virtual_avail) { + moea64_kenter(mmup, va, pa);; + pa += PAGE_SIZE; + va += PAGE_SIZE; + } + dpcpu_init(dpcpu, 0); } /* |
