[PATCH] ppc64: msChunks cleanups

Chunks are 256KB, so use constants for the size/shift/mask, rather than
getting them from the msChunks struct. The iSeries debugger (??) might still
need access to the values in the msChunks struct, so we keep them around
for now, but set them from the constant values.

Replace msChunks_entry typedef with regular u32.

Simplify msChunks_alloc() to manipulate klimit directly, rather than via
a parameter.

Move msChunks_alloc() and msChunks into iSeries_setup.c, as that's where
they're used.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 18 insertions, 2 deletions

diff --git a/arch/ppc64/kernel/iSeries_setup.c b/arch/ppc64/kernel/iSeries_setup.c
index 460e7df681a1..e47984ba7c7c 100644
--- a/arch/ppc64/kernel/iSeries_setup.c
+++ b/arch/ppc64/kernel/iSeries_setup.c
@@ -415,6 +415,22 @@ static void __init iSeries_init_early(void)
         DBG(" <- iSeries_init_early()\n");
 }
 
+struct msChunks msChunks = {
+        /* XXX We don't use these, but Piranha might need them. */
+        .chunk_size  = MSCHUNKS_CHUNK_SIZE,
+        .chunk_shift = MSCHUNKS_CHUNK_SHIFT,
+        .chunk_mask  = MSCHUNKS_OFFSET_MASK,
+};
+EXPORT_SYMBOL(msChunks);
+
+void msChunks_alloc(unsigned long num_chunks)
+{
+        klimit = _ALIGN(klimit, sizeof(u32));
+        msChunks.abs = (u32 *)klimit;
+        klimit += num_chunks * sizeof(u32);
+        msChunks.num_chunks = num_chunks;
+}
+
 /*
  * The iSeries may have very large memories ( > 128 GB ) and a partition
  * may get memory in "chunks" that may be anywhere in the 2**52 real
@@ -452,7 +468,7 @@ static void __init build_iSeries_Memory_Map(void)
 
         /* Chunk size on iSeries is 256K bytes */
         totalChunks = (u32)HvLpConfig_getMsChunks();
-        klimit = msChunks_alloc(klimit, totalChunks, 1UL << 18);
+        msChunks_alloc(totalChunks);
 
         /*
          * Get absolute address of our load area
@@ -498,7 +514,7 @@ static void __init build_iSeries_Memory_Map(void)
          */
         hptFirstChunk = (u32)addr_to_chunk(HvCallHpt_getHptAddress());
         hptSizePages = (u32)HvCallHpt_getHptPages();
-        hptSizeChunks = hptSizePages >> (msChunks.chunk_shift - PAGE_SHIFT);
+        hptSizeChunks = hptSizePages >> (MSCHUNKS_CHUNK_SHIFT - PAGE_SHIFT);
         hptLastChunk = hptFirstChunk + hptSizeChunks - 1;
 
         printk("HPT absolute addr = %016lx, size = %dK\n",