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Disabling CPU NAP modes during SMU commands is a hack needed only on U3

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systems. Don't use it on non-U3 systems to allow cpu_idle() to work
correctly.
This commit is contained in:
nwhitehorn 2010-11-10 20:09:05 +00:00
parent d6fa755921
commit a02271c20b
1 changed files with 10 additions and 2 deletions
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12
sys/powerpc/powermac/smu.c
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@ -96,6 +96,7 @@ struct smu_softc {
struct resource *sc_memr;
int sc_memrid;
int sc_u3;
bus_dma_tag_t sc_dmatag;
bus_space_tag_t sc_bt;
@ -275,6 +276,10 @@ smu_attach(device_t dev)
sc->sc_cur_cmd = NULL;
sc->sc_doorbellirqid = -1;
sc->sc_u3 = 0;
if (OF_finddevice("/u3") != -1)
sc->sc_u3 = 1;
/*
* Map the mailbox area. This should be determined from firmware,
* but I have not found a simple way to do that.
@ -417,7 +422,9 @@ smu_send_cmd(device_t dev, struct smu_cmd *cmd)
mtx_assert(&sc->sc_mtx, MA_OWNED);
powerpc_pow_enabled = 0; /* SMU cannot work if we go to NAP */
if (sc->sc_u3)
powerpc_pow_enabled = 0; /* SMU cannot work if we go to NAP */
sc->sc_cur_cmd = cmd;
/* Copy the command to the mailbox */
@ -464,7 +471,8 @@ smu_doorbell_intr(void *xdev)
sizeof(sc->sc_cmd->data));
wakeup(sc->sc_cur_cmd);
sc->sc_cur_cmd = NULL;
powerpc_pow_enabled = 1;
if (sc->sc_u3)
powerpc_pow_enabled = 1;
done:
/* Queue next command if one is pending */