diff options
| author | Etienne Carriere <etienne.carriere@st.com> | 2020-09-10 10:49:59 +0200 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2020-09-22 12:54:13 -0600 |
| commit | ccaa5747bdeae4261199dd7e80771e4de1c550ca (patch) | |
| tree | ab94e7a90a9402304aa0c5d0377992e74186ce4b /lib/fdtdec.c | |
| parent | 68de0679c940276b97c31b809168052f9d905505 (diff) | |
fdtdec: optionally add property no-map to created reserved memory node
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>
Diffstat (limited to 'lib/fdtdec.c')
| -rw-r--r-- | lib/fdtdec.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/lib/fdtdec.c b/lib/fdtdec.c index 56bf9fcc79..b8fc5e2bff 100644 --- a/lib/fdtdec.c +++ b/lib/fdtdec.c @@ -1316,7 +1316,7 @@ static int fdtdec_init_reserved_memory(void *blob) int fdtdec_add_reserved_memory(void *blob, const char *basename, const struct fdt_memory *carveout, - uint32_t *phandlep) + uint32_t *phandlep, bool no_map) { fdt32_t cells[4] = {}, *ptr = cells; uint32_t upper, lower, phandle; @@ -1416,6 +1416,12 @@ int fdtdec_add_reserved_memory(void *blob, const char *basename, if (err < 0) return err; + if (no_map) { + err = fdt_setprop(blob, node, "no-map", NULL, 0); + if (err < 0) + return err; + } + /* return the phandle for the new node for the caller to use */ if (phandlep) *phandlep = phandle; @@ -1481,7 +1487,7 @@ int fdtdec_set_carveout(void *blob, const char *node, const char *prop_name, fdt32_t value; void *prop; - err = fdtdec_add_reserved_memory(blob, name, carveout, &phandle); + err = fdtdec_add_reserved_memory(blob, name, carveout, &phandle, false); if (err < 0) { debug("failed to add reserved memory: %d\n", err); return err; |