This description covers the MS7729SE01 and MS7709SSE0101 variants. See the Section called SuperH/SH3(SH7709) Hitachi Solution Engine 7709 for instructions for the MS7709SE01 variant.
RedBoot uses the COM1 and COM2 serial ports. The default serial port settings are 38400,8,N,1. Ethernet is also supported using the 10-base T connector. Management of onboard flash is also supported.
The following RedBoot configurations are supported:
The Solution Engine ships with the Hitachi boot monitor in EPROM which allows for initial programming of RedBoot:
Set switches SW4-3 and SW4-4 to ON [boot from EPROM]
Connect a serial cable to COM2 and power up the board.
After the boot monitor banner, invoke the flash download/program command:
The monitor should now ask for input:
Flash ROM data copy to RAM Please Send A S-format Record
$ cat redboot_ROM.eprom.srec > /dev/ttyS0
Start Addrs = A1000000 End Addrs = A1xxxxxx Transfer complete
Set switch SW4-3 to OFF [boot from flash] and reboot the board. You should now see the RedBoot banner.
The exec command which allows the loading and execution of Linux kernels is supported for this board (see the Section called Executing Programs from RedBoot in Chapter 2). The exec parameters used for the SE77x9 are:
Parameter block address. This is normally the first page of the kernel image and defaults to 0x8c101000
Start address of initrd image
Size of initrd image
Kernel arguments string
Mount rdonly flags. If set to a non-zero value the root partition will be mounted read-only.
RAM disk flags. Should normally be 0x4000
Root device specification. /dev/ram is 0x0101
Finally the kernel entry address can be specified as an optional argument. The default is 0x8c102000
On the SE77x9, Linux expects to be loaded at address 0x8c101000 with the entry point at 0x8c102000. This is configurable in the kernel using the CONFIG_MEMORY_START option.
RedBoot sets up the following memory map on the SE77x9 board.
Physical Address Range Description ----------------------- ----------- 0x80000000 - 0x803fffff Flash (MBM29LV160) 0x81000000 - 0x813fffff EPROM (M27C800) 0x8c000000 - 0x8dffffff SDRAM 0xb0000000 - 0xb03fffff Ethernet (DP83902A) 0xb0400000 - 0xb07fffff SuperIO (FDC37C935A) 0xb0800000 - 0xb0bfffff Switches 0xb0c00000 - 0xbfffffff LEDs 0xb1800000 - 0xb1bfffff PCMCIA (MaruBun)
The ethernet driver uses a hardwired ESA which can, at present, only be changed in CDL.
These shell variables provide the platform-specific information needed for building RedBoot according to the procedure described in Chapter 3:
export TARGET=se77x9 export ARCH_DIR=sh export PLATFORM_DIR=se77x9
The names of configuration files are listed above with the description of the associated modes.