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// MPTable generation (on emulators)
//
// Copyright (C) 2008,2009 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
#include "paravirt.h" // qemu_cfg_irq0_override
#include "pci.h"
#include "pci_regs.h"
void
mptable_init(void)
{
if (! CONFIG_MPTABLE)
return;
dprintf(3, "init MPTable\n");
// Config structure in temp area.
struct mptable_config_s *config = malloc_tmphigh(32*1024);
if (!config) {
dprintf(1, "No space for temp mptable\n");
return;
}
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->lapic = BUILD_APIC_ADDR;
// Detect cpu info
u32 cpuid_signature, ebx, ecx, cpuid_features;
cpuid(1, &cpuid_signature, &ebx, &ecx, &cpuid_features);
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 < MaxCountCPUs; i+=pkgcpus) {
memset(cpu, 0, sizeof(*cpu));
cpu->type = MPT_TYPE_CPU;
cpu->apicid = i;
cpu->apicver = apic_version;
/* cpu flags: enabled, bootstrap cpu */
cpu->cpuflag = (i < CountCPUs) | ((i == 0) << 1);
cpu->cpusignature = cpuid_signature;
cpu->featureflag = cpuid_features;
cpu++;
}
int entrycount = cpu - cpus;
// PCI buses
struct mpt_bus *bus = (void*)cpu;
int bdf, max, lastbus = -1;
foreachpci(bdf, max) {
int curbus = pci_bdf_to_bus(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++;
entrycount++;
}
/* isa bus */
int isabusid;
memset(bus, 0, sizeof(*bus));
bus->type = MPT_TYPE_BUS;
isabusid = bus->busid = lastbus + 1;
memcpy(bus->bustype, "ISA ", sizeof(bus->bustype));
entrycount++;
/* ioapic */
u8 ioapic_id = CountCPUs;
struct mpt_ioapic *ioapic = (void*)&bus[1];
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 *intsrcs = (void*)&ioapic[1], *intsrc = intsrcs;
int dev = -1;
unsigned short mask = 0, pinmask = 0;
foreachpci(bdf, max) {
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 (qemu_cfg_irq0_override()) {
/* Destination 2 is covered by irq0->inti2 override (i ==
0). Source IRQ 2 is unused */
if (i == 0)
intsrc->dstirq = 2;
else if (i == 2)
intsrc--;
}
intsrc++;
}
entrycount += intsrc - intsrcs;
/* 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++;
entrycount++;
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 = 0; /* BSP == APIC #0 */
intsrc->dstirq = 1; /* LINTIN1 */
intsrc++;
entrycount++;
// 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) {
dprintf(1, "No room for MPTABLE!\n");
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, finalconfig, length);
}