On Thu, 2013-09-05 at 15:51 +1000, Stephen Chivers wrote:
> Add support for the Motorola/Emerson MVME5100 Single Board Computer.
>
> The MVME5100 is a 6U form factor VME64 computer with:
>
> - A single MPC7410 or MPC750 CPU
> - A HAWK Processor Host Bridge (CPU to PCI) and
> MultiProcessor Interrupt Controller (MPIC)
> - Up to 500Mb of onboard memory
> - A M48T37 Real Time Clock (RTC) and Non-Volatile Memory chip
> - Two 16550 compatible UARTS
> - Two Intel E100 Fast Ethernets
> - Two PCI Mezzanine Card (PMC) Slots
> - PPCBug Firmware
>
> The HAWK PHB/MPIC is compatible with the MPC10x devices.
>
> There is no onboard disk support. This is usually provided by
> installing a PMC in the first PMC slot.
>
> This patch revives the board support, it was present in early 2.6
> series kernels. The board support in those days was by Matt Porter of
> MontaVista Software.
>
> CSC Australia has around 31 of these boards in service. The kernel in use
> for the boards is based on 2.6.31. The boards are operated without disks
> from a file server.
>
> This patch is based on linux-3.11-rc7 and has been boot tested.
>
> V1->V2:
> Address comments by Kular Gama and Scott Wood.
> Minor adjustment to platforms/embedded6xx/Kconfig to ensure
> correct indentation where possible.
>
> Signed-off-by: Stephen Chivers <schiv...@csc.com>
> ---
Some comments below, and please run checkpatch.pl, but the next version
can probably be non-RFC if you're happy with it.
> + PowerPC,7410 {
> + device_type = "cpu";
> + reg = <0x0>;
> + /* Following required by dtc but not used */
> + d-cache-line-size = <32>;
> + i-cache-line-size = <32>;
> + i-cache-size = <32768>;
> + d-cache-size = <32768>;
> + timebase-frequency = <25000000>;
> + clock-frequency = <500000000>;
> + bus-frequency = <100000000>;
> + };
Whitespace on bus-frequency
> + mpic: interrupt-controller@f3f80000 {
> + #interrupt-cells = <2>;
> + #address-cells = <0>;
> + device_type = "open-pic";
> + compatible = "chrp,open-pic";
> + interrupt-controller;
> + reg = <0xf3f80000 0x40000>;
> + };
> +
> + };
No blank line before }
> +CONFIG_CMDLINE_BOOL=y
> +CONFIG_CMDLINE="console=ttyS0,9600 ip=dhcp root=/dev/nfs"
I take it there's no way to pass a command line in from whatever loader
this board uses... but you could put it in the dts instead.
Did you ever figure out the problem with the combined defconfig?
> + help
> + This option enables support for the Motorola (now Emerson) MVME5100
> + board.
Whitespace
> +/* Board register addresses. */
> +#define BOARD_STATUS_REG 0xfef88080
> +#define BOARD_MODFAIL_REG 0xfef88090
> +#define BOARD_MODRST_REG 0xfef880a0
> +#define BOARD_TBEN_REG 0xfef880c0
> +#define BOARD_SW_READ_REG 0xfef880e0
> +#define BOARD_GEO_ADDR_REG 0xfef880e8
> +#define BOARD_EXT_FEATURE1_REG 0xfef880f0
> +#define BOARD_EXT_FEATURE2_REG 0xfef88100
Use a space rather than a tab after #define.
> +static unsigned int pci_membase;
phys_addr_t
> +static void mvme5100_restart(char *cmd)
> +{
> + u_char *restart;
Is all that tabbing before "*restart" really necessary?
> + restart = ioremap(BOARD_MODRST_REG, 4);
> + local_irq_disable();
> + mtmsr(mfmsr() | MSR_IP);
> +
> + out_8((u_char *) restart, 0x01);
If ioremap() fails you'll panic here.
In any case, you should map things at boot time.
-Scott
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