diff options
| author | arnd@arndb.de <arnd@arndb.de> | 2006-10-24 18:31:18 +0200 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2006-10-25 14:20:21 +1000 |
| commit | 0afacde3df4c9980f505d9afd7cb0058389732ca (patch) | |
| tree | 0007cbb88b2ed7ba604fd11ca269f24617d2bb61 /arch/powerpc/platforms/cell/spu_base.c | |
| parent | eb758ce5b0d84e13cb643b6cc7cb429f6fa28258 (diff) | |
[POWERPC] spufs: allow isolated mode apps by starting the SPE loader
This patch adds general support for isolated mode SPE apps.
Isolated apps are started indirectly, by a dedicated loader "kernel".
This patch starts the loader when spe_create is invoked with the
ISOLATE flag. We do this at spe_create time to allow libspe to pass the
isolated app in before calling spe_run.
The loader is read from the device tree, at the location
"/spu-isolation/loader". If the loader is not present, an attempt to
start an isolated SPE binary will fail with -ENODEV.
Update: loader needs to be correctly aligned - copy to a kmalloced buf.
Update: remove workaround for systemsim/spurom 'L-bit' bug, which has
been fixed.
Update: don't write to runcntl on spu_run_init: SPU is already running.
Update: do spu_setup_isolated earlier
Tested on systemsim.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/platforms/cell/spu_base.c')
| -rw-r--r-- | arch/powerpc/platforms/cell/spu_base.c | 35 |
1 files changed, 24 insertions, 11 deletions
diff --git a/arch/powerpc/platforms/cell/spu_base.c b/arch/powerpc/platforms/cell/spu_base.c index f6c94087db40..d78b0af038e6 100644 --- a/arch/powerpc/platforms/cell/spu_base.c +++ b/arch/powerpc/platforms/cell/spu_base.c @@ -89,7 +89,30 @@ static int __spu_trap_data_seg(struct spu *spu, unsigned long ea) printk("%s: invalid access during switch!\n", __func__); return 1; } - if (!mm || (REGION_ID(ea) != USER_REGION_ID)) { + esid = (ea & ESID_MASK) | SLB_ESID_V; + + switch(REGION_ID(ea)) { + case USER_REGION_ID: +#ifdef CONFIG_HUGETLB_PAGE + if (in_hugepage_area(mm->context, ea)) + llp = mmu_psize_defs[mmu_huge_psize].sllp; + else +#endif + llp = mmu_psize_defs[mmu_virtual_psize].sllp; + vsid = (get_vsid(mm->context.id, ea) << SLB_VSID_SHIFT) | + SLB_VSID_USER | llp; + break; + case VMALLOC_REGION_ID: + llp = mmu_psize_defs[mmu_virtual_psize].sllp; + vsid = (get_kernel_vsid(ea) << SLB_VSID_SHIFT) | + SLB_VSID_KERNEL | llp; + break; + case KERNEL_REGION_ID: + llp = mmu_psize_defs[mmu_linear_psize].sllp; + vsid = (get_kernel_vsid(ea) << SLB_VSID_SHIFT) | + SLB_VSID_KERNEL | llp; + break; + default: /* Future: support kernel segments so that drivers * can use SPUs. */ @@ -97,16 +120,6 @@ static int __spu_trap_data_seg(struct spu *spu, unsigned long ea) return 1; } - esid = (ea & ESID_MASK) | SLB_ESID_V; -#ifdef CONFIG_HUGETLB_PAGE - if (in_hugepage_area(mm->context, ea)) - llp = mmu_psize_defs[mmu_huge_psize].sllp; - else -#endif - llp = mmu_psize_defs[mmu_virtual_psize].sllp; - vsid = (get_vsid(mm->context.id, ea) << SLB_VSID_SHIFT) | - SLB_VSID_USER | llp; - out_be64(&priv2->slb_index_W, spu->slb_replace); out_be64(&priv2->slb_vsid_RW, vsid); out_be64(&priv2->slb_esid_RW, esid); |