[PATCH] windfarm: add PowerMac 12,1 support

[David Woodhouse]

On Sat, 2008-03-22 at 23:02 +0000, David Woodhouse wrote:
> 
> Yeah, there's weird shit going on with the sensor/control
> registration.
> I think GCC is be miscompiling it -- the sequence of
>         all = all && pm121_register_control(foo...);
>         all = all && pm121_register_control(bar...);
> is bailing out as soon as 'all' gets set to zero. Despite the fact
> that pm121_register_control() quite blatantly has side-effects.

That's after I fix the names in pm121_new_control() and fix
pm121_register_control() to set controls[id] instead of always setting
controls[FAN_OD], btw. Without that I don't think it could ever have
worked. 

But it's still broken. I'll try to cut it down and file a GCC bug...

.pm121_new_control:
.LFB929:
        .loc 1 883 0
.LVL44:
        mflr 0
.LCFI38:
        std 0,16(1)
.LCFI39:
        std 30,-16(1)
.LCFI40:
        std 31,-8(1)
.LCFI41:
        stdu 1,-128(1)
.LCFI42:
        ld 30,.LCTOC0 at toc(2)
        mr 31,3
        .loc 1 886 0
        ld 9,.LC47-.LCTOC1(30)
        lwz 0,48(9)
        cmpwi 7,0,0
        bne 7,.L31
.LVL45:
        .loc 1 889 0
        ld 4,.LC49-.LCTOC1(30)
        li 5,2
        bl .pm121_register_control
        cmpdi 7,3,0
        beq 7,.L31
        .loc 1 890 0
        mr 3,31
        ld 4,.LC51-.LCTOC1(30)
        li 5,1
        bl .pm121_register_control
        cmpdi 7,3,0
        beq 7,.L31
        .loc 1 891 0
        mr 3,31
        ld 4,.LC53-.LCTOC1(30)
        li 5,0
        bl .pm121_register_control
        cmpdi 7,3,0
        beq 7,.L31
        .loc 1 892 0
        mr 3,31
        ld 4,.LC55-.LCTOC1(30)
        li 5,3
        bl .pm121_register_control
        cmpdi 7,3,0
        beq 7,.L31
        .loc 1 895 0
        ld 3,.LC57-.LCTOC1(30)
        bl .printk
        nop
        .loc 1 896 0
        ld 9,.LC47-.LCTOC1(30)
        li 0,1
        stw 0,48(9)
.LVL46:
.L31:
        .loc 1 898 0
        addi 1,1,128
        ld 0,16(1)
        mtlr 0
        ld 30,-16(1)
        ld 31,-8(1)
.LVL47:
        blr



-- 
dwmw2