lkml.org 
[lkml]   [2002]   [Jul]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
SubjectPATCH: 2.5.29 Fix pnpbios
Date
From
This should do the trick for pnpbios - we load the initial gdt into each
gdt, and we load the parameters into the gdt of the cpu making the call
relying on the spinlock to avoid bouncing cpu due to pre-empt

diff -u --exclude-from /usr/src/exclude --new-file --recursive linux-2.5.29/drivers/pnp/pnpbios_core.c linux-2.5.29-ac1/drivers/pnp/pnpbios_core.c
--- linux-2.5.29/drivers/pnp/pnpbios_core.c 2002-07-20 20:11:06.000000000 +0100
+++ linux-2.5.29-ac1/drivers/pnp/pnpbios_core.c 2002-07-28 00:35:17.000000000 +0100
@@ -124,13 +124,13 @@
".previous \n"
);

-#define Q_SET_SEL(selname, address, size) \
-set_base (gdt [(selname) >> 3], __va((u32)(address))); \
-set_limit (gdt [(selname) >> 3], size)
-
-#define Q2_SET_SEL(selname, address, size) \
-set_base (gdt [(selname) >> 3], (u32)(address)); \
-set_limit (gdt [(selname) >> 3], size)
+#define Q_SET_SEL(cpu, selname, address, size) \
+set_base(cpu_gdt_table[cpu][(selname) >> 3], __va((u32)(address))); \
+_set_limit(&cpu_gdt_table[cpu][(selname) >> 3], size)
+
+#define Q2_SET_SEL(cpu, selname, address, size) \
+set_base(cpu_gdt_table[cpu][(selname) >> 3], (u32)(address)); \
+_set_limit((char *)&cpu_gdt_table[cpu][(selname) >> 3], size)

/*
* At some point we want to use this stack frame pointer to unwind
@@ -161,10 +161,11 @@
/* On some boxes IRQ's during PnP BIOS calls are deadly. */
spin_lock_irqsave(&pnp_bios_lock, flags);

+ /* The lock prevents us bouncing CPU here */
if (ts1_size)
- Q2_SET_SEL(PNP_TS1, ts1_base, ts1_size);
+ Q2_SET_SEL(smp_processor_id(), PNP_TS1, ts1_base, ts1_size);
if (ts2_size)
- Q2_SET_SEL(PNP_TS2, ts2_base, ts2_size);
+ Q2_SET_SEL(smp_processor_id(), PNP_TS2, ts2_base, ts2_size);

__asm__ __volatile__(
"pushl %%ebp\n\t"
@@ -1265,12 +1266,16 @@
check->fields.version >> 4, check->fields.version & 15,
check->fields.pm16cseg, check->fields.pm16offset,
check->fields.pm16dseg);
- Q2_SET_SEL(PNP_CS32, &pnp_bios_callfunc, 64 * 1024);
- Q_SET_SEL(PNP_CS16, check->fields.pm16cseg, 64 * 1024);
- Q_SET_SEL(PNP_DS, check->fields.pm16dseg, 64 * 1024);
pnp_bios_callpoint.offset = check->fields.pm16offset;
pnp_bios_callpoint.segment = PNP_CS16;
pnp_bios_hdr = check;
+
+ for(i=0; i < NR_CPUS; i++)
+ {
+ Q2_SET_SEL(i, PNP_CS32, &pnp_bios_callfunc, 64 * 1024);
+ Q_SET_SEL(i, PNP_CS16, check->fields.pm16cseg, 64 * 1024);
+ Q_SET_SEL(i, PNP_DS, check->fields.pm16dseg, 64 * 1024);
+ }
break;
}
if (!pnp_bios_present())
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
\
 
 \ /
  Last update: 2005-03-22 13:27    [W:0.059 / U:1.244 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site