diff options
Diffstat (limited to 'arch/arc/plat-eznps/mtm.c')
| -rw-r--r-- | arch/arc/plat-eznps/mtm.c | 27 |
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); |