HiFive 1 Rev B Development Kit

Hi, If I use the default settings of SysTick_Config(2000000) I am trying to find: 1. the Sys Tick reload value. 2. to find the measured frequency for PTB0. 3. to calculate the processor clock rate.
Then if I modify the line to SysTick _Config(5000000), I am trying to find like on above 1, 2, and 3.
Please let me know what is the address of the LDR R1, [R0] instruction ?
Thank you.