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authorPascal Rigaux <pixel@mandriva.com>1999-10-23 16:52:34 +0000
committerPascal Rigaux <pixel@mandriva.com>1999-10-23 16:52:34 +0000
commit4e6a8773f10e6cba30ed50e2b45fa6515939ac2b (patch)
tree625c2e0c777ffd781d7d45b45566bf24051d2c0b /perl-install/c
parent825da272c3b2e89b86e19656ade350240204896b (diff)
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Diffstat (limited to 'perl-install/c')
-rw-r--r--perl-install/c/Makefile.PL1
-rw-r--r--perl-install/c/smp.c342
-rw-r--r--perl-install/c/stuff.xs.pm3
3 files changed, 346 insertions, 0 deletions
diff --git a/perl-install/c/Makefile.PL b/perl-install/c/Makefile.PL
index 647d5bcc0..a8d6df7b8 100644
--- a/perl-install/c/Makefile.PL
+++ b/perl-install/c/Makefile.PL
@@ -10,6 +10,7 @@ WriteMakefile(
'NAME' => 'stuff',
'OPTIMIZE' => '-Os',
'MAKEFILE' => 'Makefile_c',
+ 'OBJECT' => 'stuff.o smp.o',
'VERSION_FROM' => 'stuff.pm', # finds $VERSION
'LIBS' => [$libs], # e.g., '-lm'
'DEFINE' => '', # e.g., '-DHAVE_SOMETHING'
diff --git a/perl-install/c/smp.c b/perl-install/c/smp.c
new file mode 100644
index 000000000..08b2b0a7c
--- /dev/null
+++ b/perl-install/c/smp.c
@@ -0,0 +1,342 @@
+/*
+[_Anarchy_(alan@lightning.swansea.uk.linux.org)] you should do one check
+ though - if the board seems to be SMP and the CPU in /proc/cpuinfo is non
+ intel dont install an SMP kernel - thats a dual pentium board with a cyrix
+ or similar single cpu in it
+*/
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <string.h>
+#include <errno.h>
+
+#ifdef __alpha__
+int alphaDetectSMP(void)
+{
+ int issmp = 0;
+ FILE *f;
+
+ f = fopen("/proc/cpuinfo", "r");
+ if (f) {
+ char buff[1024];
+
+ while (fgets (buff, 1024, f) != NULL) {
+ if (!strncmp (buff, "cpus detected\t\t: ", 17)) {
+ if (strtoul (buff + 17, NULL, 0) > 1)
+ issmp = 1;
+ break;
+ }
+ }
+ fclose(f);
+ } else
+ return -1;
+
+ return issmp;
+}
+#endif /* __alpha__ */
+
+#ifdef __sparc__
+int sparcDetectSMP(void)
+{
+ int issmp = 0;
+ FILE *f;
+
+ f = fopen("/proc/cpuinfo", "r");
+ if (f) {
+ char buff[1024];
+
+ while (fgets (buff, 1024, f) != NULL) {
+ if (!strncmp (buff, "ncpus active\t: ", 15)) {
+ if (strtoul (buff + 15, NULL, 0) > 1)
+ issmp = 1;
+ break;
+ }
+ }
+ fclose(f);
+ } else
+ return -1;
+
+ return issmp;
+}
+#endif /* __sparc__ */
+
+#ifdef __i386__
+#define SMP_MAGIC_IDENT (('_'<<24)|('P'<<16)|('M'<<8)|'_')
+
+struct intel_mp_floating
+{
+ char mpf_signature[4]; /* "_MP_" */
+ unsigned long mpf_physptr; /* Configuration table address */
+ unsigned char mpf_length; /* Our length (paragraphs) */
+ unsigned char mpf_specification;/* Specification version */
+ unsigned char mpf_checksum; /* Checksum (makes sum 0) */
+ unsigned char mpf_feature1; /* Standard or configuration ? */
+ unsigned char mpf_feature2; /* Bit7 set for IMCR|PIC */
+ unsigned char mpf_feature3; /* Unused (0) */
+ unsigned char mpf_feature4; /* Unused (0) */
+ unsigned char mpf_feature5; /* Unused (0) */
+};
+
+struct mp_config_table
+{
+ char mpc_signature[4];
+#define MPC_SIGNATURE "PCMP"
+ unsigned short mpc_length; /* Size of table */
+ char mpc_spec; /* 0x01 */
+ char mpc_checksum;
+ char mpc_oem[8];
+ char mpc_productid[12];
+ unsigned long mpc_oemptr; /* 0 if not present */
+ unsigned short mpc_oemsize; /* 0 if not present */
+ unsigned short mpc_oemcount;
+ unsigned long mpc_lapic; /* APIC address */
+ unsigned long reserved;
+};
+
+/* Followed by entries */
+
+#define MP_PROCESSOR 0
+#define MP_BUS 1
+#define MP_IOAPIC 2
+#define MP_INTSRC 3
+#define MP_LINTSRC 4
+
+struct mpc_config_processor
+{
+ unsigned char mpc_type;
+ unsigned char mpc_apicid; /* Local APIC number */
+ unsigned char mpc_apicver; /* Its versions */
+ unsigned char mpc_cpuflag;
+#define CPU_ENABLED 1 /* Processor is available */
+#define CPU_BOOTPROCESSOR 2 /* Processor is the BP */
+ unsigned long mpc_cpufeature;
+#define CPU_STEPPING_MASK 0x0F
+#define CPU_MODEL_MASK 0xF0
+#define CPU_FAMILY_MASK 0xF00
+ unsigned long mpc_featureflag; /* CPUID feature value */
+ unsigned long mpc_reserved[2];
+};
+
+struct mpc_config_bus
+{
+ unsigned char mpc_type;
+ unsigned char mpc_busid;
+ unsigned char mpc_bustype[6] __attribute((packed));
+};
+
+#define BUSTYPE_EISA "EISA"
+#define BUSTYPE_ISA "ISA"
+#define BUSTYPE_INTERN "INTERN" /* Internal BUS */
+#define BUSTYPE_MCA "MCA"
+#define BUSTYPE_VL "VL" /* Local bus */
+#define BUSTYPE_PCI "PCI"
+#define BUSTYPE_PCMCIA "PCMCIA"
+
+/* We don't understand the others */
+
+struct mpc_config_ioapic
+{
+ unsigned char mpc_type;
+ unsigned char mpc_apicid;
+ unsigned char mpc_apicver;
+ unsigned char mpc_flags;
+#define MPC_APIC_USABLE 0x01
+ unsigned long mpc_apicaddr;
+};
+
+struct mpc_config_intsrc
+{
+ unsigned char mpc_type;
+ unsigned char mpc_irqtype;
+ unsigned short mpc_irqflag;
+ unsigned char mpc_srcbus;
+ unsigned char mpc_srcbusirq;
+ unsigned char mpc_dstapic;
+ unsigned char mpc_dstirq;
+};
+
+#define MP_INT_VECTORED 0
+#define MP_INT_NMI 1
+#define MP_INT_SMI 2
+#define MP_INT_EXTINT 3
+
+#define MP_IRQDIR_DEFAULT 0
+#define MP_IRQDIR_HIGH 1
+#define MP_IRQDIR_LOW 3
+
+
+struct mpc_config_intlocal
+{
+ unsigned char mpc_type;
+ unsigned char mpc_irqtype;
+ unsigned short mpc_irqflag;
+ unsigned char mpc_srcbusid;
+ unsigned char mpc_srcbusirq;
+ unsigned char mpc_destapic;
+#define MP_APIC_ALL 0xFF
+ unsigned char mpc_destapiclint;
+};
+
+
+/*
+ * Default configurations
+ *
+ * 1 2 CPU ISA 82489DX
+ * 2 2 CPU EISA 82489DX no IRQ 8 or timer chaining
+ * 3 2 CPU EISA 82489DX
+ * 4 2 CPU MCA 82489DX
+ * 5 2 CPU ISA+PCI
+ * 6 2 CPU EISA+PCI
+ * 7 2 CPU MCA+PCI
+ */
+
+
+static int smp_found_config=0;
+
+/*
+ * Checksum an MP configuration block.
+ */
+
+static int mpf_checksum(unsigned char *mp, int len)
+{
+ int sum=0;
+ while(len--)
+ sum+=*mp++;
+ return sum&0xFF;
+}
+
+static int do_smp_scan_config(unsigned long *bp, unsigned long length)
+{
+ struct intel_mp_floating *mpf;
+
+/*
+ if (sizeof(*mpf)!=16)
+ logMessage("Error: MPF size\n");
+*/
+
+ while (length>0)
+ {
+ if (*bp==SMP_MAGIC_IDENT)
+ {
+ mpf=(struct intel_mp_floating *)bp;
+ if (mpf->mpf_length==1 &&
+ !mpf_checksum((unsigned char *)bp,16) &&
+ (mpf->mpf_specification == 1
+ || mpf->mpf_specification == 4) )
+ {
+ /*logMessage("Intel MultiProcessor Specification v1.%d\n", mpf->mpf_specification);
+ if (mpf->mpf_feature2&(1<<7))
+ logMessage(" IMCR and PIC compatibility mode.\n");
+ else
+ logMessage(" Virtual Wire compatibility mode.\n");
+*/
+ smp_found_config=1;
+ return 1;
+ }
+ }
+ bp+=4;
+ length-=16;
+ }
+
+ return 0;
+}
+
+static int smp_scan_config(int mem_fd, unsigned long base,
+ unsigned long length)
+{
+ void *p;
+ int o;
+
+ o=base&0xFFF;
+ base-=o;
+ length+=o;
+
+ p=mmap(0, (length+4095)&0xFFFFF000, PROT_READ, MAP_SHARED,
+ mem_fd, (base&0xFFFF0000));
+ if(p==MAP_FAILED)
+ {
+ /*logMessage("SMP Probe error: mmap: %s", strerror(errno));*/
+ return 1;
+ }
+ do_smp_scan_config(p+o, length-o);
+ munmap(p, (length+4095)&0xFFFFF000);
+ return 0;
+}
+
+static int intelDetectSMP(void)
+{
+ int mem_fd;
+
+ mem_fd=open("/dev/mem", O_RDONLY);
+
+ if(mem_fd==-1)
+ {
+ /*logMessage("Error detecting SMP: /dev/mem: %s", strerror(errno));*/
+ }
+
+ /*
+ * FIXME: Linux assumes you have 640K of base ram..
+ * this continues the error...
+ *
+ * 1) Scan the bottom 1K for a signature
+ * 2) Scan the top 1K of base RAM
+ * 3) Scan the 64K of bios
+ */
+ if (!smp_scan_config(mem_fd, 0x0, 0x400) &&
+ !smp_scan_config(mem_fd, 639*0x400,0x400) &&
+ !smp_scan_config(mem_fd, 0xF0000,0x10000)) {
+#if 0
+
+ /*
+ * If it is an SMP machine we should know now, unless the
+ * configuration is in an EISA/MCA bus machine with an
+ * extended bios data area.
+ *
+ * there is a real-mode segmented pointer pointing to the
+ * 4K EBDA area at 0x40E, calculate and scan it here.
+ *
+ * NOTE! There are Linux loaders that will corrupt the EBDA
+ * area, and as such this kind of SMP config may be less
+ * trustworthy, simply because the SMP table may have been
+ * stomped on during early boot. These loaders are buggy and
+ * should be fixed.
+ */
+ unsigned int address;
+
+ address = *(unsigned short *)phys_to_virt(0x40E);
+ address<<=4;
+ smp_scan_config(mem_fd, address, 0x1000);
+ if (smp_found_config)
+ /*logMessage("WARNING: MP table in the EBDA can be UNSAFE, contact linux-smp@vger.rutgers.edu if you experience SMP problems!\n");*/
+#endif
+ }
+/*
+ if(smp_found_config)
+ logMessage("Detected SMP capable motherboard\n");
+ else
+ logMessage("Detected non SMP capable motherboard\n");
+*/
+ return smp_found_config;
+}
+#endif /* __i386__ */
+
+int detectSMP(void)
+{
+ static int isSMP = -1;
+
+ if (isSMP != -1)
+ return isSMP;
+
+#ifdef __i386__
+ return isSMP = intelDetectSMP();
+#elif __sparc__
+ return isSMP = sparcDetectSMP();
+#elif __alpha__
+ return isSMP = alphaDetectSMP();
+#endif
+}
+
diff --git a/perl-install/c/stuff.xs.pm b/perl-install/c/stuff.xs.pm
index 12bdc913c..db07893a1 100644
--- a/perl-install/c/stuff.xs.pm
+++ b/perl-install/c/stuff.xs.pm
@@ -106,6 +106,9 @@ lseek_sector(fd, sector, offset)
void
setsid()
+int
+detectSMP()
+
unsigned int
getpagesize()