I can only see 64MB RAM, I thought like all v1 models have 128MB of RAM
dmesg:
root@OpenWrt:~# dmesg
[ 0.000000] Linux version 4.14.209 (builder@buildhost) (gcc version 7.5.0 (OpenWrt GCC 7.5.0 r11257-5090152ae3)) #0 Sun Dec 6 07:31:03 2020
[ 0.000000] MyLoader: sysp=69296996, boardp=69696996, parts=69696996
[ 0.000000] bootconsole [early0] enabled
[ 0.000000] CPU0 revision is: 00019750 (MIPS 74Kc)
[ 0.000000] SoC: Qualcomm Atheros QCA9558 ver 1 rev 0
[ 0.000000] Determined physical RAM map:
[ 0.000000] memory: 04000000 @ 00000000 (usable)
[ 0.000000] Initrd not found or empty - disabling initrd
[ 0.000000] Primary instruction cache 64kB, VIPT, 4-way, linesize 32 bytes.
[ 0.000000] Primary data cache 32kB, 4-way, VIPT, cache aliases, linesize 32 bytes
[ 0.000000] Zone ranges:
[ 0.000000] Normal [mem 0x0000000000000000-0x0000000003ffffff]
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000000000000-0x0000000003ffffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x0000000003ffffff]
[ 0.000000] On node 0 totalpages: 16384
[ 0.000000] free_area_init_node: node 0, pgdat 804ecd50, node_mem_map 81000020
[ 0.000000] Normal zone: 128 pages used for memmap
[ 0.000000] Normal zone: 0 pages reserved
[ 0.000000] Normal zone: 16384 pages, LIFO batch:3
[ 0.000000] random: get_random_bytes called from 0x804f0740 with crng_init=0
[ 0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
[ 0.000000] pcpu-alloc: [0] 0
[ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 16256
[ 0.000000] Kernel command line: board=RE450 mtdparts=spi0.0:128k(u-boot)ro,6016k(firmware),64k(partition-table)ro,64k(product-info)ro,1856k(config)ro,64k(art)ro console=ttyS0,115200 rootfstype=squashfs noinitrd
[ 0.000000] PID hash table entries: 256 (order: -2, 1024 bytes)
[ 0.000000] Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
[ 0.000000] Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
[ 0.000000] Writing ErrCtl register=00000000
[ 0.000000] Readback ErrCtl register=00000000
[ 0.000000] Memory: 59320K/65536K available (3954K kernel code, 193K rwdata, 516K rodata, 320K init, 212K bss, 6216K reserved, 0K cma-reserved)
[ 0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[ 0.000000] NR_IRQS: 51
[ 0.000000] Clocks: CPU:720.000MHz, DDR:600.000MHz, AHB:200.000MHz, Ref:40.000MHz
[ 0.000000] clocksource: MIPS: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 5309056796 ns
[ 0.000007] sched_clock: 32 bits at 360MHz, resolution 2ns, wraps every 5965232126ns
[ 0.008308] Calibrating delay loop... 358.80 BogoMIPS (lpj=1794048)
[ 0.074984] pid_max: default: 32768 minimum: 301
[ 0.080080] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.087124] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.096464] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.106966] futex hash table entries: 256 (order: -1, 3072 bytes)
[ 0.114426] NET: Registered protocol family 16
[ 0.120338] MIPS: machine is TP-LINK RE450
[ 0.126543] registering PCI controller with io_map_base unset
[ 0.132847] ar724x-pci ar724x-pci.1: PCIe link is down
[ 0.138315] registering PCI controller with io_map_base unset
[ 0.394495] PCI host bridge to bus 0000:00