Linux/AM4378: port uboot but stopped in sdram_init func??

yongsheng yang

Intellectual 450 points

Part Number: AM4378

Tool/software: Linux

i port uboot on am43xx_evm to my board,and i can get the serial output,but stopped in the sdram_init() function,

i only get

what's the problem maybe?is the sram_init function is error and nor portable to my board??

over 8 years ago

0 Yordan Kovachev over 8 years ago

TI__Guru**** 161600 points

Hi,

Most likely your ddr settings are not correct & the device cannot set the RAM accordingly.
Verify the EMIF/DDR settings using this wiki: processors.wiki.ti.com/.../AM437x_DDR_Configuration_and_Programming_Guide.

Best Regards,
Yordan

0 yongsheng yang over 8 years ago in reply to Yordan Kovachev

Intellectual 450 points

e,thanks ,i will see that.

0 yongsheng yang over 8 years ago

Intellectual 450 points

i solved this question,the reason is that i forget a modify to board/ti/am34xx/board.c which is below:

void emif_get_ext_phy_ctrl_const_regs(const u32 **regs, u32 *size)
{
	//if (board_is_eposevm()) {
	//	*regs = ext_phy_ctrl_const_base_lpddr2;
	//	*size = ARRAY_SIZE(ext_phy_ctrl_const_base_lpddr2);
	//} else if (board_is_gpevm()) {
		*regs = ext_phy_ctrl_const_base_ddr3;
		*size = ARRAY_SIZE(ext_phy_ctrl_const_base_ddr3);
	//}

	return;
}

after comment these then i can get in boot command.

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Linux/AM4378: port uboot but stopped in sdram_init func??