This is a part 19/20 of patchset for add support NEC PC-9800 architecture,
against 2.5.45.
Summary:
SMP related modules.
- add PC-9800 bus spec.
diffstat:
arch/i386/kernel/apic.c | 16 +++++++++++++---
arch/i386/kernel/io_apic.c | 25 +++++++++++++++++++++++--
arch/i386/kernel/mpparse.c | 35 ++++++++++++++++++++++++++++++++++-
arch/i386/kernel/smpboot.c | 14 ++++++++++++++
include/asm-i386/mpspec.h | 4 +++-
include/asm-i386/smpboot.h | 9 +++++++++
6 files changed, 96 insertions(+), 7 deletions(-)
patch:
diff -urN linux/arch/i386/kernel/apic.c linux98/arch/i386/kernel/apic.c
--- linux/arch/i386/kernel/apic.c Wed Oct 16 13:20:29 2002
+++ linux98/arch/i386/kernel/apic.c Wed Oct 16 15:40:20 2002
@@ -33,6 +33,8 @@
#include <asm/arch_hooks.h>
#include "mach_apic.h"
+#include "io_ports.h"
+
void __init apic_intr_init(void)
{
#ifdef CONFIG_SMP
@@ -135,9 +137,13 @@
* PIC mode, enable APIC mode in the IMCR, i.e.
* connect BSP's local APIC to INT and NMI lines.
*/
+#ifndef CONFIG_PC9800
printk("leaving PIC mode, enabling APIC mode.\n");
outb(0x70, 0x22);
outb(0x01, 0x23);
+#else
+ printk("On NEC98, Changing mode from PIC to APIC isNOT supported yet.\n");
+#endif
}
}
@@ -150,9 +156,13 @@
* interrupts, including IPIs, won't work beyond
* this point! The only exception are INIT IPIs.
*/
+#ifndef CONFIG_PC9800
printk("disabling APIC mode, entering PIC mode.\n");
outb(0x70, 0x22);
outb(0x00, 0x23);
+#else
+ printk("On NEC98, Changing mode from APIC to PIC isNOT supported yet.\n");
+#endif
}
}
@@ -759,9 +769,9 @@
spin_lock_irqsave(&i8253_lock, flags);
- outb_p(0x00, 0x43);
- count = inb_p(0x40);
- count |= inb_p(0x40) << 8;
+ outb_p(0x00, PIT_MODE);
+ count = inb_p(PIT_CH0);
+ count |= inb_p(PIT_CH0) << 8;
spin_unlock_irqrestore(&i8253_lock, flags);
diff -urN linux/arch/i386/kernel/io_apic.c linux98/arch/i386/kernel/io_apic.c
--- linux/arch/i386/kernel/io_apic.c Sat Oct 19 13:01:22 2002
+++ linux98/arch/i386/kernel/io_apic.c Sat Oct 19 16:22:51 2002
@@ -37,6 +37,8 @@
#include <asm/desc.h>
#include "mach_apic.h"
+#include "io_ports.h"
+
#undef APIC_LOCKUP_DEBUG
#define APIC_LOCKUP_DEBUG
@@ -354,7 +356,9 @@
if ((mp_bus_id_to_type[lbus] == MP_BUS_ISA ||
mp_bus_id_to_type[lbus] == MP_BUS_EISA ||
- mp_bus_id_to_type[lbus] == MP_BUS_MCA) &&
+ mp_bus_id_to_type[lbus] == MP_BUS_MCA ||
+ mp_bus_id_to_type[lbus] == MP_BUS_NEC98
+ ) &&
(mp_irqs[i].mpc_irqtype == type) &&
(mp_irqs[i].mpc_srcbusirq == irq))
@@ -448,6 +452,12 @@
#define default_MCA_trigger(idx) (1)
#define default_MCA_polarity(idx) (0)
+/* NEC98 interrupts are always polarity zero edge triggered,
+ * when listed as conforming in the MP table. */
+
+#define default_NEC98_trigger(idx) (0)
+#define default_NEC98_polarity(idx) (0)
+
static int __init MPBIOS_polarity(int idx)
{
int bus = mp_irqs[idx].mpc_srcbus;
@@ -482,6 +492,11 @@
polarity = default_MCA_polarity(idx);
break;
}
+ case MP_BUS_NEC98: /* NEC 98 pin */
+ {
+ polarity = default_NEC98_polarity(idx);
+ break;
+ }
default:
{
printk(KERN_WARNING "broken BIOS!!\n");
@@ -551,6 +566,11 @@
trigger = default_MCA_trigger(idx);
break;
}
+ case MP_BUS_NEC98: /* NEC 98 pin */
+ {
+ trigger = default_NEC98_trigger(idx);
+ break;
+ }
default:
{
printk(KERN_WARNING "broken BIOS!!\n");
@@ -612,6 +632,7 @@
case MP_BUS_ISA: /* ISA pin */
case MP_BUS_EISA:
case MP_BUS_MCA:
+ case MP_BUS_NEC98:
{
irq = mp_irqs[idx].mpc_srcbusirq;
break;
@@ -1718,7 +1739,7 @@
* Additionally, something is definitely wrong with irq9
* on PIIX4 boards.
*/
-#define PIC_IRQS (1<<2)
+#define PIC_IRQS (1 << PIC_CASCADE_IR)
void __init setup_IO_APIC(void)
{
diff -urN linux/arch/i386/kernel/mpparse.c linux98/arch/i386/kernel/mpparse.c
--- linux/arch/i386/kernel/mpparse.c Wed Oct 16 13:20:29 2002
+++ linux98/arch/i386/kernel/mpparse.c Wed Oct 16 15:40:20 2002
@@ -236,6 +236,8 @@
mp_current_pci_id++;
} else if (strncmp(str, BUSTYPE_MCA, sizeof(BUSTYPE_MCA)-1) == 0) {
mp_bus_id_to_type[m->mpc_busid] = MP_BUS_MCA;
+ } else if (strncmp(str, BUSTYPE_NEC98, sizeof(BUSTYPE_NEC98)-1) == 0) {
+ mp_bus_id_to_type[m->mpc_busid] = MP_BUS_NEC98;
} else {
printk("Unknown bustype %s - ignoring\n", str);
}
@@ -681,7 +683,12 @@
* Read the physical hardware table. Anything here will
* override the defaults.
*/
- if (!smp_read_mpc((void *)mpf->mpf_physptr)) {
+#ifndef CONFIG_PC9800
+ if (!smp_read_mpc((void *)mpf->mpf_physptr))
+#else
+ if (!smp_read_mpc(phys_to_virt(mpf->mpf_physptr)))
+#endif
+ {
smp_found_config = 0;
printk(KERN_ERR "BIOS bug, MP table errors detected!...\n");
printk(KERN_ERR "... disabling SMP support. (tell your hw vendor)\n");
@@ -735,8 +742,30 @@
printk("found SMP MP-table at %08lx\n",
virt_to_phys(mpf));
reserve_bootmem(virt_to_phys(mpf), PAGE_SIZE);
+#ifndef CONFIG_PC9800
if (mpf->mpf_physptr)
reserve_bootmem(mpf->mpf_physptr, PAGE_SIZE);
+#else
+ /*
+ * PC-9800's MPC table places on the very last of
+ * physical memory; so that simply reserving PAGE_SIZE
+ * from mpg->mpf_physptr yields BUG() in
+ * reserve_bootmem.
+ */
+ if (mpf->mpf_physptr) {
+ /*
+ * We cannot access to MPC table to compute
+ * table size yet, as only few megabytes from
+ * the bottom is mapped now.
+ */
+ unsigned long size = PAGE_SIZE;
+ unsigned long end = max_low_pfn * PAGE_SIZE;
+ if (mpf->mpf_physptr + size > end)
+ size = end - mpf->mpf_physptr;
+ reserve_bootmem(mpf->mpf_physptr, size);
+ }
+#endif
+
mpf_found = mpf;
return 1;
}
@@ -748,7 +777,9 @@
void __init find_smp_config (void)
{
+#ifndef CONFIG_PC9800
unsigned int address;
+#endif
/*
* FIXME: Linux assumes you have 640K of base ram..
@@ -762,6 +793,7 @@
smp_scan_config(639*0x400,0x400) ||
smp_scan_config(0xF0000,0x10000))
return;
+#ifndef CONFIG_PC9800 /* PC-9800 has no EBDA area? */
/*
* If it is an SMP machine we should know now, unless the
* configuration is in an EISA/MCA bus machine with an
@@ -784,6 +816,7 @@
smp_scan_config(address, 0x400);
if (smp_found_config)
printk(KERN_WARNING "WARNING: MP table in the EBDA can be UNSAFE, contact linux-smp@vger.kernel.org if you experience SMP problems!\n");
+#endif
}
diff -urN linux/arch/i386/kernel/smpboot.c linux98/arch/i386/kernel/smpboot.c
--- linux/arch/i386/kernel/smpboot.c Wed Oct 16 13:20:29 2002
+++ linux98/arch/i386/kernel/smpboot.c Wed Oct 16 15:40:20 2002
@@ -821,13 +821,27 @@
nmi_low = *((volatile unsigned short *) TRAMPOLINE_LOW);
} +#ifndef CONFIG_PC9800
CMOS_WRITE(0xa, 0xf);
+#else
+ /* reset code is stored in 8255 on PC-9800. */
+ outb(0x0e, 0x37); /* SHUT0 = 0 */
+#endif
local_flush_tlb();
Dprintk("1.\n");
*((volatile unsigned short *) TRAMPOLINE_HIGH) = start_eip >> 4;
Dprintk("2.\n");
*((volatile unsigned short *) TRAMPOLINE_LOW) = start_eip & 0xf;
Dprintk("3.\n");
+#ifdef CONFIG_PC9800
+ /*
+ * On PC-9800, continuation on warm reset is done by loading
+ * %ss:%sp from 0x0000:0404 and executing 'lret', so:
+ */
+ /* 0x3f0 is on unused interrupt vector and should be safe... */
+ *((volatile unsigned long *) phys_to_virt(0x404)) = 0x000003f0;
+ Dprintk("4.\n");
+#endif
/*
* Be paranoid about clearing APIC errors.
diff -urN linux/include/asm-i386/mpspec.h linux98/include/asm-i386/mpspec.h
--- linux/include/asm-i386/mpspec.h Fri Apr 12 13:58:13 2002
+++ linux98/include/asm-i386/mpspec.h Fri Apr 12 14:02:42 2002
@@ -105,6 +105,7 @@
#define BUSTYPE_TC "TC"
#define BUSTYPE_VME "VME"
#define BUSTYPE_XPRESS "XPRESS"
+#define BUSTYPE_NEC98 "NEC98"
struct mpc_config_ioapic
{
@@ -195,7 +196,8 @@
MP_BUS_ISA = 1,
MP_BUS_EISA,
MP_BUS_PCI,
- MP_BUS_MCA
+ MP_BUS_MCA,
+ MP_BUS_NEC98
};
extern int mp_bus_id_to_type [MAX_MP_BUSSES];
extern int mp_bus_id_to_node [MAX_MP_BUSSES];
diff -urN linux/include/asm-i386/smpboot.h linux98/include/asm-i386/smpboot.h
--- linux/include/asm-i386/smpboot.h Sat Oct 12 13:22:19 2002
+++ linux98/include/asm-i386/smpboot.h Sat Oct 12 19:33:46 2002
@@ -13,8 +13,17 @@
#define TRAMPOLINE_LOW phys_to_virt(0x8)
#define TRAMPOLINE_HIGH phys_to_virt(0xa)
#else /* !CONFIG_CLUSTERED_APIC */
+ #ifndef CONFIG_PC9800
#define TRAMPOLINE_LOW phys_to_virt(0x467)
#define TRAMPOLINE_HIGH phys_to_virt(0x469)
+ #else /* CONFIG_PC9800 */
+ /*
+ * On PC-9800, continuation on warm reset is done by loading
+ * %ss:%sp from 0x0000:0404 and executing 'lret', so:
+ */
+ #define TRAMPOLINE_LOW phys_to_virt(0x4fa)
+ #define TRAMPOLINE_HIGH phys_to_virt(0x4fc)
+ #endif /* !CONFIG_PC9800 */
#endif /* CONFIG_CLUSTERED_APIC */
#ifdef CONFIG_CLUSTERED_APIC
-
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