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authorCooper Jr., Franklin <fcooper@ti.com>2014-06-27 13:31:15 -0500
committerTom Rini <trini@ti.com>2014-07-07 19:42:34 -0400
commit8038b497e742af2845523ed09b560bfc8cb42089 (patch)
treebaafb8646191200cd64ad7e49faabd77b7d6fe58 /board/ti
parent2c95211167091e543e20f4f457d3d1f1f660a6d4 (diff)
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am43xx: Tune the system to avoid DSS underflows
* This is done by limiting the ARM's bandwidth and setting DSS priority in the EMIF controller to ensure underflows do not occur.
Diffstat (limited to 'board/ti')
-rw-r--r--board/ti/am43xx/board.c68
1 files changed, 62 insertions, 6 deletions
diff --git a/board/ti/am43xx/board.c b/board/ti/am43xx/board.c
index 5eaa4a5..7e239f1 100644
--- a/board/ti/am43xx/board.c
+++ b/board/ti/am43xx/board.c
@@ -157,12 +157,16 @@ const struct emif_regs emif_regs_lpddr2 = {
.emif_rd_wr_lvl_rmp_ctl = 0x0,
.emif_rd_wr_lvl_ctl = 0x0,
.emif_ddr_phy_ctlr_1 = 0x0E084006,
- .emif_rd_wr_exec_thresh = 0x00000405,
+ .emif_rd_wr_exec_thresh = 0x80000405,
.emif_ddr_ext_phy_ctrl_1 = 0x04010040,
.emif_ddr_ext_phy_ctrl_2 = 0x00500050,
.emif_ddr_ext_phy_ctrl_3 = 0x00500050,
.emif_ddr_ext_phy_ctrl_4 = 0x00500050,
- .emif_ddr_ext_phy_ctrl_5 = 0x00500050
+ .emif_ddr_ext_phy_ctrl_5 = 0x00500050,
+ .emif_prio_class_serv_map = 0x80000001,
+ .emif_connect_id_serv_1_map = 0x80000094,
+ .emif_connect_id_serv_2_map = 0x00000000,
+ .emif_cos_config = 0x000FFFFF
};
const u32 ext_phy_ctrl_const_base_lpddr2[] = {
@@ -217,7 +221,11 @@ const struct emif_regs ddr3_emif_regs_400Mhz = {
.emif_rd_wr_lvl_rmp_win = 0x0,
.emif_rd_wr_lvl_rmp_ctl = 0x0,
.emif_rd_wr_lvl_ctl = 0x0,
- .emif_rd_wr_exec_thresh = 0x00000405
+ .emif_rd_wr_exec_thresh = 0x80000405,
+ .emif_prio_class_serv_map = 0x80000001,
+ .emif_connect_id_serv_1_map = 0x80000094,
+ .emif_connect_id_serv_2_map = 0x00000000,
+ .emif_cos_config = 0x000FFFFF
};
/* EMIF DDR3 Configurations are different for beta AM43X GP EVMs */
@@ -236,7 +244,11 @@ const struct emif_regs ddr3_emif_regs_400Mhz_beta = {
.emif_ddr_ext_phy_ctrl_3 = 0x00000091,
.emif_ddr_ext_phy_ctrl_4 = 0x000000B5,
.emif_ddr_ext_phy_ctrl_5 = 0x000000E5,
- .emif_rd_wr_exec_thresh = 0x00000405
+ .emif_rd_wr_exec_thresh = 0x80000405,
+ .emif_prio_class_serv_map = 0x80000001,
+ .emif_connect_id_serv_1_map = 0x80000094,
+ .emif_connect_id_serv_2_map = 0x00000000,
+ .emif_cos_config = 0x000FFFFF
};
/* EMIF DDR3 Configurations are different for production AM43X GP EVMs */
@@ -255,7 +267,11 @@ const struct emif_regs ddr3_emif_regs_400Mhz_production = {
.emif_ddr_ext_phy_ctrl_3 = 0x00000091,
.emif_ddr_ext_phy_ctrl_4 = 0x000000B9,
.emif_ddr_ext_phy_ctrl_5 = 0x000000E6,
- .emif_rd_wr_exec_thresh = 0x00000405
+ .emif_rd_wr_exec_thresh = 0x80000405,
+ .emif_prio_class_serv_map = 0x80000001,
+ .emif_connect_id_serv_1_map = 0x80000094,
+ .emif_connect_id_serv_2_map = 0x00000000,
+ .emif_cos_config = 0x000FFFFF
};
static const struct emif_regs ddr3_sk_emif_regs_400Mhz = {
@@ -277,7 +293,11 @@ static const struct emif_regs ddr3_sk_emif_regs_400Mhz = {
.emif_rd_wr_lvl_rmp_win = 0x0,
.emif_rd_wr_lvl_rmp_ctl = 0x00000000,
.emif_rd_wr_lvl_ctl = 0x00000000,
- .emif_rd_wr_exec_thresh = 0x00000000,
+ .emif_rd_wr_exec_thresh = 0x80000000,
+ .emif_prio_class_serv_map = 0x80000001,
+ .emif_connect_id_serv_1_map = 0x80000094,
+ .emif_connect_id_serv_2_map = 0x00000000,
+ .emif_cos_config = 0x000FFFFF
};
const u32 ext_phy_ctrl_const_base_ddr3[] = {
@@ -587,8 +607,44 @@ void sdram_init(void)
int board_init(void)
{
+ struct l3f_cfg_bwlimiter *bwlimiter = (struct l3f_cfg_bwlimiter *)L3F_CFG_BWLIMITER;
+ u32 mreqprio_0, mreqprio_1, modena_init0_bw_fractional,
+ modena_init0_bw_integer, modena_init0_watermark_0;
+
gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
+ /* Clear all important bits for DSS errata that may need to be tweaked*/
+ mreqprio_0 = readl(&cdev->mreqprio_0) & MREQPRIO_0_SAB_INIT1_MASK &
+ MREQPRIO_0_SAB_INIT0_MASK;
+
+ mreqprio_1 = readl(&cdev->mreqprio_1) & MREQPRIO_1_DSS_MASK;
+
+ modena_init0_bw_fractional = readl(&bwlimiter->modena_init0_bw_fractional) &
+ BW_LIMITER_BW_FRAC_MASK;
+
+ modena_init0_bw_integer = readl(&bwlimiter->modena_init0_bw_integer) &
+ BW_LIMITER_BW_INT_MASK;
+
+ modena_init0_watermark_0 = readl(&bwlimiter->modena_init0_watermark_0) &
+ BW_LIMITER_BW_WATERMARK_MASK;
+
+ /* Setting MReq Priority of the DSS*/
+ mreqprio_0 |= 0x77;
+
+ /*
+ * Set L3 Fast Configuration Register
+ * Limiting bandwith for ARM core to 700 MBPS
+ */
+ modena_init0_bw_fractional |= 0x10;
+ modena_init0_bw_integer |= 0x3;
+
+ writel(mreqprio_0, &cdev->mreqprio_0);
+ writel(mreqprio_1, &cdev->mreqprio_1);
+
+ writel(modena_init0_bw_fractional, &bwlimiter->modena_init0_bw_fractional);
+ writel(modena_init0_bw_integer, &bwlimiter->modena_init0_bw_integer);
+ writel(modena_init0_watermark_0, &bwlimiter->modena_init0_watermark_0);
+
return 0;
}