I have to configure the system (u-boot, kernel) and create the RIO driver. Could you advise me how to fix my current problem?
a) Kernel log: ... Setting up RapidIO peer-to-peer network /soc8548@e0000000/rapidi0 RIO: Of-device full name /soc8548@e0000000/rapidio@c0000 RIO: LAW start 0x00000000c0000000, size 0x0000000020000000. RIO: Regs start 0xe00c0000 size 0x00020000 [there are not any next messages, the board hung up]
b) Corresponding Source Code The kernel hung up in the file linux-2.6.23/arch/powerpc/sysdev/fsl_rio.c Function fsl_rio_setup() is executed but it hung on in_be32(regs_win + RIO_CCSR);
c) u-boot configuration #define CONFIG_RIO 1 #define CFG_RIO_MEM_BASE 0xC0000000 #define CFG_RIO_MEM_SIZE 0x20000000 /* 512M */
d) Device Tree Source rapidio@c0000 { compatible = "fsl,rapidio-delta"; #address-cells = <2>; #size-cells = <2>; reg = <c0000 20000>; ranges = <0 0 c0000000 20000000>; interrupt-parent = <&mpic>; interrupts = <30 2 31 2 32 2 35 2 36 2 37 2 38 2>; };
If you can not advise me on technical aspects, tell me please what I should read to understand initialization of RIO in the kernel.
Thanks, Adam