// MPTable generation (on emulators)
//
-// Copyright (C) 2008,2009 Kevin O'Connor <kevin@koconnor.net>
+// Copyright (C) 2008-2010 Kevin O'Connor <kevin@koconnor.net>
// Copyright (C) 2006 Fabrice Bellard
//
// This file may be distributed under the terms of the GNU LGPLv3 license.
#include "util.h" // dprintf
#include "config.h" // CONFIG_*
#include "mptable.h" // MPTABLE_SIGNATURE
-
-#if CONFIG_KVM
-int irq0override = 1;
-#else
-int irq0override = 0;
-#endif
+#include "paravirt.h" // qemu_cfg_irq0_override
+#include "pci.h"
+#include "pci_regs.h"
void
mptable_init(void)
dprintf(3, "init MPTable\n");
- int smp_cpus = CountCPUs;
- if (smp_cpus <= 1)
- // Building an mptable on uniprocessor machines confuses some OSes.
- return;
-
- int length = (sizeof(struct mptable_config_s)
- + sizeof(struct mpt_cpu) * smp_cpus
- + sizeof(struct mpt_bus)
- + sizeof(struct mpt_ioapic)
- + sizeof(struct mpt_intsrc) * 16);
- struct mptable_config_s *config = malloc_fseg(length);
- struct mptable_floating_s *floating = malloc_fseg(sizeof(*floating));
- if (!config || !floating) {
- dprintf(1, "No room for MPTABLE!\n");
+ // Config structure in temp area.
+ struct mptable_config_s *config = malloc_tmp(32*1024);
+ if (!config) {
+ warn_noalloc();
return;
}
-
- /* floating pointer structure */
- memset(floating, 0, sizeof(*floating));
- floating->signature = MPTABLE_SIGNATURE;
- floating->physaddr = (u32)config;
- floating->length = 1;
- floating->spec_rev = 4;
- floating->checksum -= checksum(floating, sizeof(*floating));
-
- // Config structure.
memset(config, 0, sizeof(*config));
config->signature = MPCONFIG_SIGNATURE;
config->spec = 4;
memcpy(config->oemid, CONFIG_CPUNAME8, sizeof(config->oemid));
memcpy(config->productid, "0.1 ", sizeof(config->productid));
- config->entrycount = smp_cpus + 2 + 16;
config->lapic = BUILD_APIC_ADDR;
- // CPU definitions.
+ // Detect cpu info
u32 cpuid_signature, ebx, ecx, cpuid_features;
cpuid(1, &cpuid_signature, &ebx, &ecx, &cpuid_features);
- struct mpt_cpu *cpus = (void*)&config[1];
+ if (! cpuid_signature) {
+ // Use default values.
+ cpuid_signature = 0x600;
+ cpuid_features = 0x201;
+ }
+ int pkgcpus = 1;
+ if (cpuid_features & (1 << 28)) {
+ /* Only populate the MPS tables with the first logical CPU in
+ each package */
+ pkgcpus = (ebx >> 16) & 0xff;
+ pkgcpus = 1 << (__fls(pkgcpus - 1) + 1); /* round up to power of 2 */
+ }
+ u8 apic_version = readl((u8*)BUILD_APIC_ADDR + 0x30) & 0xff;
+
+ // CPU definitions.
+ struct mpt_cpu *cpus = (void*)&config[1], *cpu = cpus;
int i;
- for (i = 0; i < smp_cpus; i++) {
- struct mpt_cpu *cpu = &cpus[i];
+ for (i = 0; i < MaxCountCPUs; i+=pkgcpus) {
memset(cpu, 0, sizeof(*cpu));
cpu->type = MPT_TYPE_CPU;
cpu->apicid = i;
- cpu->apicver = 0x11;
+ cpu->apicver = apic_version;
/* cpu flags: enabled, bootstrap cpu */
- cpu->cpuflag = (i == 0 ? 3 : 1);
- if (cpuid_signature) {
- cpu->cpusignature = cpuid_signature;
- cpu->featureflag = cpuid_features;
- } else {
- cpu->cpusignature = 0x600;
- cpu->featureflag = 0x201;
- }
+ cpu->cpuflag = ((i<CountCPUs) ? 0x01 : 0x00) | ((i==0) ? 0x02 : 0x00);
+ cpu->cpusignature = cpuid_signature;
+ cpu->featureflag = cpuid_features;
+ cpu++;
+ }
+ int entrycount = cpu - cpus;
+
+ // PCI buses
+ struct mpt_bus *buses = (void*)cpu, *bus = buses;
+ int lastbus = -1;
+ struct pci_device *pci;
+ foreachpci(pci) {
+ int curbus = pci_bdf_to_bus(pci->bdf);
+ if (curbus == lastbus)
+ continue;
+ lastbus = curbus;
+ memset(bus, 0, sizeof(*bus));
+ bus->type = MPT_TYPE_BUS;
+ bus->busid = curbus;
+ memcpy(bus->bustype, "PCI ", sizeof(bus->bustype));
+ bus++;
}
/* isa bus */
- struct mpt_bus *bus = (void*)&cpus[smp_cpus];
+ int isabusid;
memset(bus, 0, sizeof(*bus));
bus->type = MPT_TYPE_BUS;
+ isabusid = bus->busid = lastbus + 1;
memcpy(bus->bustype, "ISA ", sizeof(bus->bustype));
+ bus++;
+ entrycount += bus - buses;
/* ioapic */
- u8 ioapic_id = smp_cpus;
- struct mpt_ioapic *ioapic = (void*)&bus[1];
+ u8 ioapic_id = CountCPUs;
+ struct mpt_ioapic *ioapic = (void*)bus;
memset(ioapic, 0, sizeof(*ioapic));
ioapic->type = MPT_TYPE_IOAPIC;
ioapic->apicid = ioapic_id;
ioapic->apicver = 0x11;
ioapic->flags = 1; // enable
ioapic->apicaddr = BUILD_IOAPIC_ADDR;
+ entrycount++;
/* irqs */
- struct mpt_intsrc *intsrc = (void*)&ioapic[1];
+ struct mpt_intsrc *intsrcs = (void*)&ioapic[1], *intsrc = intsrcs;
+ int dev = -1;
+ unsigned short mask = 0, pinmask = 0;
+
+ foreachpci(pci) {
+ u16 bdf = pci->bdf;
+ int pin = pci_config_readb(bdf, PCI_INTERRUPT_PIN);
+ int irq = pci_config_readb(bdf, PCI_INTERRUPT_LINE);
+ if (pin == 0)
+ continue;
+ if (dev != pci_bdf_to_busdev(bdf)) {
+ dev = pci_bdf_to_busdev(bdf);
+ pinmask = 0;
+ }
+ if (pinmask & (1 << pin)) /* pin was seen already */
+ continue;
+ pinmask |= (1 << pin);
+ mask |= (1 << irq);
+ memset(intsrc, 0, sizeof(*intsrc));
+ intsrc->type = MPT_TYPE_INTSRC;
+ intsrc->irqtype = 0; /* INT */
+ intsrc->irqflag = 1; /* active high */
+ intsrc->srcbus = pci_bdf_to_bus(bdf); /* PCI bus */
+ intsrc->srcbusirq = (pci_bdf_to_dev(bdf) << 2) | (pin - 1);
+ intsrc->dstapic = ioapic_id;
+ intsrc->dstirq = irq;
+ intsrc++;
+ }
+
for (i = 0; i < 16; i++) {
memset(intsrc, 0, sizeof(*intsrc));
+ if (mask & (1 << i))
+ continue;
intsrc->type = MPT_TYPE_INTSRC;
+ intsrc->irqtype = 0; /* INT */
+ intsrc->irqflag = 0; /* conform to bus spec */
+ intsrc->srcbus = isabusid; /* ISA bus */
intsrc->srcbusirq = i;
intsrc->dstapic = ioapic_id;
intsrc->dstirq = i;
- if (irq0override) {
+ if (qemu_cfg_irq0_override()) {
/* Destination 2 is covered by irq0->inti2 override (i ==
0). Source IRQ 2 is unused */
if (i == 0)
intsrc++;
}
- // Set checksum.
- config->length = (void*)intsrc - (void*)config;
- config->checksum -= checksum(config, config->length);
+ /* Local interrupt assignment */
+ intsrc->type = MPT_TYPE_LOCAL_INT;
+ intsrc->irqtype = 3; /* ExtINT */
+ intsrc->irqflag = 0; /* PO, EL default */
+ intsrc->srcbus = isabusid; /* ISA */
+ intsrc->srcbusirq = 0;
+ intsrc->dstapic = 0; /* BSP == APIC #0 */
+ intsrc->dstirq = 0; /* LINTIN0 */
+ intsrc++;
+
+ intsrc->type = MPT_TYPE_LOCAL_INT;
+ intsrc->irqtype = 1; /* NMI */
+ intsrc->irqflag = 0; /* PO, EL default */
+ intsrc->srcbus = isabusid; /* ISA */
+ intsrc->srcbusirq = 0;
+ intsrc->dstapic = 0xff; /* to all local APICs */
+ intsrc->dstirq = 1; /* LINTIN1 */
+ intsrc++;
+ entrycount += intsrc - intsrcs;
+
+ // Finalize config structure.
+ int length = (void*)intsrc - (void*)config;
+ config->entrycount = entrycount;
+ config->length = length;
+ config->checksum -= checksum(config, length);
+
+ // Allocate final memory locations. (In theory the config
+ // structure can go in high memory, but Linux kernels before
+ // v2.6.30 crash with that.)
+ struct mptable_config_s *finalconfig = malloc_fseg(length);
+ struct mptable_floating_s *floating = malloc_fseg(sizeof(*floating));
+ if (!finalconfig || !floating) {
+ warn_noalloc();
+ free(config);
+ free(finalconfig);
+ free(floating);
+ return;
+ }
+ memcpy(finalconfig, config, length);
+ free(config);
+
+ /* floating pointer structure */
+ memset(floating, 0, sizeof(*floating));
+ floating->signature = MPTABLE_SIGNATURE;
+ floating->physaddr = (u32)finalconfig;
+ floating->length = 1;
+ floating->spec_rev = 4;
+ floating->checksum -= checksum(floating, sizeof(*floating));
dprintf(1, "MP table addr=%p MPC table addr=%p size=%d\n",
- floating, config, config->length);
+ floating, finalconfig, length);
}
projects / seabios.git / blobdiff