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fdtdec: optionally add property no-map to created reserved memory node

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Add boolean input argument @no_map to helper function
fdtdec_add_reserved_memory() to add or not "no-map" property
for an added reserved memory node.

Property no-map is used by the Linux kernel to not not map memory
in its static memory mapping. It is needed for example for the|
consistency of system non-cached memory and to prevent speculative
accesses to some firewalled memory.

No functional change. A later change will update to OPTEE library to
add no-map property to OP-TEE reserved memory nodes.

Signed-off-by: Etienne Carriere <etienne.carriere@st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Etienne Carriere
2020-09-10 10:49:59 +02:00
committed by Simon Glass
parent 68de0679c9
commit ccaa5747bd
5 changed files with 16 additions and 9 deletions
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6
test/dm/fdtdec.c
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@@ -80,7 +80,7 @@ static int dm_test_fdtdec_add_reserved_memory(struct unit_test_state *uts)
resv.start = 0x1000;
resv.end = 0x1fff;
ut_assertok(fdtdec_add_reserved_memory(blob, "rsvd_region",
&resv, &phandle));
&resv, &phandle, false));
/* Test /reserve-memory and its subnode should exist */
parent = fdt_path_offset(blob, "/reserved-memory");
@@ -101,7 +101,7 @@ static int dm_test_fdtdec_add_reserved_memory(struct unit_test_state *uts)
resv.start = 0x2000;
resv.end = 0x2fff;
ut_assertok(fdtdec_add_reserved_memory(blob, "rsvd_region1",
&resv, &phandle1));
&resv, &phandle1, false));
subnode = fdt_path_offset(blob, "/reserved-memory/rsvd_region1");
ut_assert(subnode > 0);
@@ -115,7 +115,7 @@ static int dm_test_fdtdec_add_reserved_memory(struct unit_test_state *uts)
resv.start = 0x1000;
resv.end = 0x1fff;
ut_assertok(fdtdec_add_reserved_memory(blob, "rsvd_region2",
&resv, &phandle1));
&resv, &phandle1, false));
subnode = fdt_path_offset(blob, "/reserved-memory/rsvd_region2");
ut_assert(subnode < 0);