Use the device-tree instead as we'll be moving probe_machine()
out of early_setup
Signed-off-by: Benjamin Herrenschmidt <b...@kernel.crashing.org>
---
arch/powerpc/mm/hash_utils_64.c | 25 ++++++++++++++++---------
1 file changed, 16 insertions(+), 9 deletions(-)
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index 839e1ad..a261e44 100644
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -34,6 +34,7 @@
#include <linux/signal.h>
#include <linux/memblock.h>
#include <linux/context_tracking.h>
+#include <linux/libfdt.h>
#include <asm/processor.h>
#include <asm/pgtable.h>
@@ -731,7 +732,7 @@ static void __init htab_initialize(void)
unsigned long table;
unsigned long pteg_count;
unsigned long prot;
- unsigned long base = 0, size = 0, limit;
+ unsigned long base = 0, size = 0;
struct memblock_region *reg;
DBG(" -> htab_initialize()\n");
@@ -757,7 +758,8 @@ static void __init htab_initialize(void)
htab_hash_mask = pteg_count - 1;
- if (firmware_has_feature(FW_FEATURE_LPAR)) {
+ if (firmware_has_feature(FW_FEATURE_LPAR) ||
+ firmware_has_feature(FW_FEATURE_PS3_LV1)) {
/* Using a hypervisor which owns the htab */
htab_address = NULL;
_SDR1 = 0;
@@ -772,16 +774,21 @@ static void __init htab_initialize(void)
ppc_md.hpte_clear_all();
#endif
} else {
- /* Find storage for the HPT. Must be contiguous in
- * the absolute address space. On cell we want it to be
- * in the first 2 Gig so we can use it for IOMMU hacks.
+ unsigned long limit = MEMBLOCK_ALLOC_ANYWHERE;
+
+#ifdef CONFIG_PPC_CELL
+ /* Cell may require the hash table down low when using the
+ * Axon IOMMU in order to fit the dynamic region over it, see
+ * comments in cell/iommu.c
*/
- if (machine_is(cell))
+ if (fdt_subnode_offset(initial_boot_params, 0, "axon") > 0) {
limit = 0x80000000;
- else
- limit = MEMBLOCK_ALLOC_ANYWHERE;
+ pr_info("Hash table forced below 2G for Axon IOMMU\n");
+ }
+#endif /* CONFIG_PPC_CELL */
- table = memblock_alloc_base(htab_size_bytes, htab_size_bytes,
limit);
+ table = memblock_alloc_base(htab_size_bytes, htab_size_bytes,
+ limit);
DBG("Hash table allocated at %lx, size: %lx\n", table,
htab_size_bytes);
--
2.7.4
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