diff options
Diffstat (limited to 'perl-install/c/smp.c')
| -rw-r--r-- | perl-install/c/smp.c | 342 |
1 files changed, 0 insertions, 342 deletions
diff --git a/perl-install/c/smp.c b/perl-install/c/smp.c deleted file mode 100644 index 08b2b0a7c..000000000 --- a/perl-install/c/smp.c +++ /dev/null @@ -1,342 +0,0 @@ -/* -[_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 -} - |