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Opened 3 years ago

Last modified 3 years ago

#19110 reopened defect

MT7621 can not use 512M DDR3 memory

Reported by: 308025220@… Owned by: developers
Priority: normal Milestone:
Component: base system Version: Trunk
Keywords: MT7621 512M DDR3 memory Cc:

Description

we use sumsang 512M DDR3 for our board .

i am trying to set the memory size in the dts file .

when i set the memory lower than 256M , everything is ok .
but when i set the memory over 256M , something error when i bootup .

PS.our platform is mediated MT7621

[ 13.160000] NET: Registered protocol family 10
[ 13.170000] ip6_tables: (C) 2000-2006 Netfilter Core Team
[ 13.190000] Reserved instruction in kernel code#2:
[ 13.190000] CPU: 0 PID: 492 Comm: kmodloader Tainted: G D 3.14.30 #2
[ 13.190000] task: 9b2ecec0 ti: 9b29a000 task.ti: 9b29a000
[ 13.190000] $ 0 : 00000000 00000000 00000000 00400100
[ 13.190000] $ 4 : 9b2ce680 00000001 9b2ce6c0 ffffffff
[ 13.190000] $ 8 : 8030f558 00000001 00001933 80348920
[ 13.190000] $12 : 00000001 00001932 9ac00480 00000000
[ 13.190000] $16 : 9b2cd000 9b29bed8 00000000 9b2ce6cc
[ 13.190000] $20 : 80320000 80320000 00000000 00000012
[ 13.190000] $24 : 00000000 800b3360
[ 13.190000] $28 : 9b29a000 9b29bda0 00000124 800cdc78
[ 13.190000] Hi : 00000003
[ 13.190000] Lo : 122f6d80
[ 13.190000] epc : 9b248a8c 0x9b248a8c
[ 13.190000] Tainted: G D
[ 13.190000] ra : 800cdc78 do_one_initcall+0xf0/0x194
[ 13.190000] Status: 11009c03 KERNEL EXL IE
[ 13.190000] Cause : 10800028
[ 13.190000] PrId : 0001992f (MIPS 1004Kc)
[ 13.190000] Modules linked in: ledtrig_usbdev(+) ip6t_REJECT ip6table_raw ip6table_mangle ip6table_filter ip6_tables x_tables ipv6 gpio_butn
[ 13.190000] Process kmodloader (pid: 492, threadinfo=9b29a000, task=9b2ecec0, tls=778d0440)
[ 13.190000] Stack : 00000000 9b2ce708 9ac00380 8135cb80 00000001 00000000 00000000 00000000

00000000 00000012 00000124 800fa334 9ac00400 801e57f8 80320d0c 9b824f00
9ac00380 9b2ce6c0 9b29bed8 80320000 9b2ce6cc 8008003c 9b2cb400 9b2ce6cc
9b2ce6c0 9b29bed8 80320000 9b2ce6cc 80320000 80160888 00413314 00000008
00400000 00000000 9b2ce6cc 00007fff 80268ccc 9ac00480 00000000 00000000
...

[ 13.190000] Call Trace:
[ 13.190000] [<800fa334>] free_hot_cold_page+0x30/0x150
[ 13.190000] [<801e57f8>] remove_vm_area+0x7c/0xac
[ 13.190000] [<8008003c>] blocking_notifier_call_chain+0x14/0x20
[ 13.190000] [<80160888>] load_module+0x15d8/0x1bdc
[ 13.190000] [<80268ccc>] unknown_module_param_cb+0x0/0x68
[ 13.190000] [<8001a5b8>] SyS_init_module+0x54/0xd4
[ 13.190000] [<8005aa24>] vmalloc_node+0x30/0x3c
[ 13.190000] [<8001a5b8>] SyS_init_module+0x54/0xd4
[ 13.190000] [<8001a620>] SyS_init_module+0xbc/0xd4
[ 13.190000] [<800d3164>] do_sys_open+0x210/0x238
[ 13.190000] [<80007a28>] handle_sys+0x128/0x14c

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Change History (2)

comment:1 follow-up: Changed 3 years ago by nbd

  • Resolution set to not_a_bug
  • Status changed from new to closed

The SoC does not support 512M DDR RAM. The hardware memory map only allows up to 448M DRAM memory space.

comment:2 in reply to: ↑ 1 Changed 3 years ago by anonymous

  • Resolution not_a_bug deleted
  • Status changed from closed to reopened

Replying to nbd:

The SoC does not support 512M DDR RAM. The hardware memory map only allows up to 448M DRAM memory space.

yes, i knew .

memory@0 {

device_type = "memory";
reg = <0x0 0x1c000000>;

};

i defined 448M memory .
and get the error like this .

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