ARC: HSDK-4xD: add CSM configuration support
Add support for CSM enable/disable and CSM relocation via
hsdk_init command. We allow to relocate CSM to the beginning of
any aperture even if HW support finer granularity.
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
diff --git a/board/synopsys/hsdk/hsdk.c b/board/synopsys/hsdk/hsdk.c
index b25b133..2cbb59d 100644
--- a/board/synopsys/hsdk/hsdk.c
+++ b/board/synopsys/hsdk/hsdk.c
@@ -80,6 +80,7 @@
u32_env nvlim;
u32_env icache;
u32_env dcache;
+ u32_env csm_location;
u32_env l2_cache;
};
@@ -132,6 +133,7 @@
{ "dcache_ena", ENV_HEX, true, 0, 1, &env_common.dcache },
#if defined(CONFIG_BOARD_HSDK_4XD)
{ "l2_cache_ena", ENV_HEX, true, 0, 1, &env_common.l2_cache },
+ { "csm_location", ENV_HEX, true, 0, NO_CCM, &env_common.csm_location },
#endif /* CONFIG_BOARD_HSDK_4XD */
{}
};
@@ -299,6 +301,30 @@
slc_disable();
}
+#define CREG_CSM_BASE (CREG_BASE + 0x210)
+
+static void init_cluster_csm(void)
+{
+ /* ARC HS38 in HSDK SoC doesn't include CSM */
+ if (!is_board_match_config(T_BOARD_HSDK_4XD))
+ return;
+
+ if (env_common.csm_location.val == NO_CCM) {
+ write_aux_reg(ARC_AUX_CSM_ENABLE, 0);
+ } else {
+ /*
+ * CSM base address is 256kByte aligned but we allow to map
+ * CSM only to aperture start (256MByte aligned)
+ * The field in CREG_CSM_BASE is in 17:2 bits itself so we need
+ * to shift it.
+ */
+ u32 csm_base = (env_common.csm_location.val * SZ_1K) << 2;
+
+ write_aux_reg(ARC_AUX_CSM_ENABLE, 1);
+ writel(csm_base, (void __iomem *)CREG_CSM_BASE);
+ }
+}
+
static void init_master_icache(void)
{
if (icache_status()) {
@@ -678,6 +704,7 @@
* cores.
*/
init_cluster_nvlim();
+ init_cluster_csm();
init_cluster_slc();
}