diff options
| author | Len Brown <len.brown@intel.com> | 2006-06-29 19:57:46 -0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2006-06-29 19:57:46 -0400 |
| commit | d120cfb544ed6161b9d32fb6c4648c471807ee6b (patch) | |
| tree | 7757ad0198d8df76ff5c60f939a687687c41da00 /arch/powerpc/kernel/iommu.c | |
| parent | 9dce0e950dbfab4148f35ac6f297d8638cdc63c4 (diff) | |
| parent | bf7e8511088963078484132636839b59e25cf14f (diff) | |
merge linus into release branch
Conflicts:
drivers/acpi/acpi_memhotplug.c
Diffstat (limited to 'arch/powerpc/kernel/iommu.c')
| -rw-r--r-- | arch/powerpc/kernel/iommu.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c index 7cb77c20fc5..3d677ac9965 100644 --- a/arch/powerpc/kernel/iommu.c +++ b/arch/powerpc/kernel/iommu.c @@ -38,6 +38,7 @@ #include <asm/iommu.h> #include <asm/pci-bridge.h> #include <asm/machdep.h> +#include <asm/kdump.h> #define DBG(...) @@ -440,8 +441,37 @@ struct iommu_table *iommu_init_table(struct iommu_table *tbl, int nid) tbl->it_largehint = tbl->it_halfpoint; spin_lock_init(&tbl->it_lock); +#ifdef CONFIG_CRASH_DUMP + if (ppc_md.tce_get) { + unsigned long index, tceval; + unsigned long tcecount = 0; + + /* + * Reserve the existing mappings left by the first kernel. + */ + for (index = 0; index < tbl->it_size; index++) { + tceval = ppc_md.tce_get(tbl, index + tbl->it_offset); + /* + * Freed TCE entry contains 0x7fffffffffffffff on JS20 + */ + if (tceval && (tceval != 0x7fffffffffffffffUL)) { + __set_bit(index, tbl->it_map); + tcecount++; + } + } + if ((tbl->it_size - tcecount) < KDUMP_MIN_TCE_ENTRIES) { + printk(KERN_WARNING "TCE table is full; "); + printk(KERN_WARNING "freeing %d entries for the kdump boot\n", + KDUMP_MIN_TCE_ENTRIES); + for (index = tbl->it_size - KDUMP_MIN_TCE_ENTRIES; + index < tbl->it_size; index++) + __clear_bit(index, tbl->it_map); + } + } +#else /* Clear the hardware table in case firmware left allocations in it */ ppc_md.tce_free(tbl, tbl->it_offset, tbl->it_size); +#endif if (!welcomed) { printk(KERN_INFO "IOMMU table initialized, virtual merging %s\n", |