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Diffstat (limited to 'arch/arc/plat-eznps/mtm.c')
-rw-r--r--arch/arc/plat-eznps/mtm.c27
1 files changed, 25 insertions, 2 deletions
diff --git a/arch/arc/plat-eznps/mtm.c b/arch/arc/plat-eznps/mtm.c
index dcbf8f6ebf74..8a13f0ac49fb 100644
--- a/arch/arc/plat-eznps/mtm.c
+++ b/arch/arc/plat-eznps/mtm.c
@@ -21,10 +21,13 @@
#include <plat/mtm.h>
#include <plat/smp.h>
-#define MT_CTRL_HS_CNT 0xFF
+#define MT_HS_CNT_MIN 0x01
+#define MT_HS_CNT_MAX 0xFF
#define MT_CTRL_ST_CNT 0xF
#define NPS_NUM_HW_THREADS 0x10
+static int mtm_hs_ctr = MT_HS_CNT_MAX;
+
#ifdef CONFIG_EZNPS_MEM_ERROR_ALIGN
int do_memory_error(unsigned long address, struct pt_regs *regs)
{
@@ -127,7 +130,7 @@ void mtm_enable_core(unsigned int cpu)
/* Enable HW schedule, stall counter, mtm */
mt_ctrl.value = 0;
mt_ctrl.hsen = 1;
- mt_ctrl.hs_cnt = MT_CTRL_HS_CNT;
+ mt_ctrl.hs_cnt = mtm_hs_ctr;
mt_ctrl.mten = 1;
write_aux_reg(CTOP_AUX_MT_CTRL, mt_ctrl.value);
@@ -138,3 +141,23 @@ void mtm_enable_core(unsigned int cpu)
*/
cpu_relax();
}
+
+/* Verify and set the value of the mtm hs counter */
+static int __init set_mtm_hs_ctr(char *ctr_str)
+{
+ long hs_ctr;
+ int ret;
+
+ ret = kstrtol(ctr_str, 0, &hs_ctr);
+
+ if (ret || hs_ctr > MT_HS_CNT_MAX || hs_ctr < MT_HS_CNT_MIN) {
+ pr_err("** Invalid @nps_mtm_hs_ctr [%d] needs to be [%d:%d] (incl)\n",
+ hs_ctr, MT_HS_CNT_MIN, MT_HS_CNT_MAX);
+ return -EINVAL;
+ }
+
+ mtm_hs_ctr = hs_ctr;
+
+ return 0;
+}
+early_param("nps_mtm_hs_ctr", set_mtm_hs_ctr);