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-rw-r--r--arch/powerpc/mm/40x_mmu.c14
1 files changed, 13 insertions, 1 deletions
diff --git a/arch/powerpc/mm/40x_mmu.c b/arch/powerpc/mm/40x_mmu.c
index 58969b5..5810967 100644
--- a/arch/powerpc/mm/40x_mmu.c
+++ b/arch/powerpc/mm/40x_mmu.c
@@ -141,7 +141,19 @@ unsigned long __init mmu_mapin_ram(unsigned long top)
* coverage with normal-sized pages (or other reasons) do not
* attempt to allocate outside the allowed range.
*/
- memblock_set_current_limit(memstart_addr + mapped);
+ memblock_set_current_limit(mapped);
return mapped;
}
+
+void setup_initial_memory_limit(phys_addr_t first_memblock_base,
+ phys_addr_t first_memblock_size)
+{
+ /* We don't currently support the first MEMBLOCK not mapping 0
+ * physical on those processors
+ */
+ BUG_ON(first_memblock_base != 0);
+
+ /* 40x can only access 16MB at the moment (see head_40x.S) */
+ memblock_set_current_limit(min_t(u64, first_memblock_size, 0x00800000));
+}
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