On 7 Nov 2007, at 21:48, Scott Long wrote:
Rui Paulo wrote:
On Nov 7, 2007 7:50 PM, Maxim Sobolev <[EMAIL PROTECTED]> wrote:
I don't really like the fact that it has to be turned on manually.
Is it
possible to make this automatic based on BIOS Id or something like
this?
Yes, I can turn this on for MacBooks.
Yeah, at least have it on by default for the systems that we know have
the problem. I still think that it needs wider application, but as
long
as the immediate and identifiable issue is addressed, I'm happy.
Ok, if there are no objections, I plan to request approval from my
mentor and from re@ for the following patch:
Index: clock.c
===================================================================
RCS file: /home/ncvs/src/sys/i386/isa/clock.c,v
retrieving revision 1.240
diff -u -p -r1.240 clock.c
--- clock.c 26 Oct 2007 03:23:54 -0000 1.240
+++ clock.c 9 Nov 2007 11:34:56 -0000
@@ -130,6 +130,9 @@ static u_char rtc_statusb = RTCSB_24HR;
#define ACQUIRED 2
#define ACQUIRE_PENDING 3
+/* Intel ICH register */
+#define ICH_PMBASE 0x400
+
static u_char timer2_state;
static unsigned i8254_get_timecount(struct timecounter *tc);
@@ -616,11 +619,31 @@ i8254_init(void)
void
startrtclock()
{
+ char *ichenv, *sysenv;
u_int delta, freq;
writertc(RTC_STATUSA, rtc_statusa);
writertc(RTC_STATUSB, RTCSB_24HR);
+ /*
+ * On some systems, namely MacBooks, we need to disallow the
+ * legacy USB circuit to generate an SMI# because this can
+ * cause several problems, namely: incorrect CPU frequency
+ * detection and failure to start the APs.
+ */
+ ichenv = getenv("hw.ich.disable_legacy_usb");
+ sysenv = getenv("smbios.system.product");
+ if ((ichenv != NULL) || (sysenv != NULL &&
+ strncmp(sysenv, "MacBook", 7) == 0)) {
+ if (bootverbose)
+ printf("Disabling LEGACY_USB_EN bit on Intel ICH.\n");
+ outl(ICH_PMBASE + 0x30, inl(ICH_PMBASE + 0x30) & ~0x8);
+ if (ichenv)
+ freeenv(ichenv);
+ if (sysenv)
+ freeenv(sysenv);
+ }
+
freq = calibrate_clocks();
#ifdef CLK_CALIBRATION_LOOP
if (bootverbose) {
--
Rui Paulo
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