From: Jacob Lifshay <programmerjake@gmail.com>
Date: Mon, 23 Oct 2023 23:09:51 +0000 (-0700)
Subject: reduce mmap BLOCK_SIZE to 1 << 28 so it works on armv7a
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=783bce62ce7e557b3525ceef0f6e4b7fc9a71ef1;p=openpower-isa.git

reduce mmap BLOCK_SIZE to 1 << 28 so it works on armv7a
---

diff --git a/src/openpower/decoder/isa/mem.py b/src/openpower/decoder/isa/mem.py
index a32f47fb..cad3d052 100644
--- a/src/openpower/decoder/isa/mem.py
+++ b/src/openpower/decoder/isa/mem.py
@@ -301,7 +301,11 @@ class _MMapPageFlags(enum.IntFlag):
 _MMAP_PAGE_SIZE = 1 << 16  # size of chunk that we track
 _PAGE_COUNT = (1 << 48) // _MMAP_PAGE_SIZE  # 48-bit address space
 _NEG_PG_IDX_START = _PAGE_COUNT // 2  # start of negative half of address space
-BLOCK_SIZE = 1 << 32  # code assumes it's a power of two
+
+# code assumes BLOCK_SIZE is a power of two
+# BLOCK_SIZE = 1 << 32
+BLOCK_SIZE = 1 << 28  # reduced so it works on armv7a
+
 assert BLOCK_SIZE % _MMAP_PAGE_SIZE == 0
 DEFAULT_BLOCK_ADDRS = (
     0,  # low end of user space