diff options
author | Joel Sherrill <joel.sherrill@OARcorp.com> | 2011-07-18 16:33:30 +0000 |
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committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 2011-07-18 16:33:30 +0000 |
commit | 894a2c910af0cc98eeae88f433a9079e2cc349f3 (patch) | |
tree | 53c748b5ec3a61a96d1d411a16c18a3f1078eb5f /c/src/lib/libbsp/i386/shared/smp/smp-imps.c | |
parent | 2011-07-18 Till Straumann <strauman@slac.stanford.edu> (diff) | |
download | rtems-894a2c910af0cc98eeae88f433a9079e2cc349f3.tar.bz2 |
2011-07-18 Joel Sherrill <joel.sherrill@oarcorp.com>
* shared/irq/apic.h, shared/smp/smp-imps.c, shared/smp/smp-imps.h:
Reformat to be more compliant with RTEMS style.
Diffstat (limited to 'c/src/lib/libbsp/i386/shared/smp/smp-imps.c')
-rw-r--r-- | c/src/lib/libbsp/i386/shared/smp/smp-imps.c | 887 |
1 files changed, 438 insertions, 449 deletions
diff --git a/c/src/lib/libbsp/i386/shared/smp/smp-imps.c b/c/src/lib/libbsp/i386/shared/smp/smp-imps.c index f020514fc9..f07ab48e45 100644 --- a/c/src/lib/libbsp/i386/shared/smp/smp-imps.c +++ b/c/src/lib/libbsp/i386/shared/smp/smp-imps.c @@ -41,12 +41,11 @@ * (1) : This code has never been tested on an MPS-compatible system with * 486 CPUs, but is expected to work. * (2) : Presumes "int", "long", and "unsigned" are 32 bits in size, and - * that 32-bit pointers and memory addressing is used uniformly. + * that 32-bit pointers and memory addressing is used uniformly. */ #define _SMP_IMPS_C - /* * XXXXX The following absolutely must be defined!!! * @@ -56,17 +55,16 @@ */ #if 0 -#define KERNEL_PRINT(x) /* some kind of print function */ -#define CMOS_WRITE_BYTE(x,y) /* write unsigned char "y" at CMOS loc "x" */ -#define CMOS_READ_BYTE(x) /* read unsigned char at CMOS loc "x" */ -#define PHYS_TO_VIRTUAL(x) /* convert physical address "x" to virtual */ -#define VIRTUAL_TO_PHYS(x) /* convert virtual address "x" to physical */ -#define UDELAY(x) /* delay roughly at least "x" microsecs */ -#define TEST_BOOTED(x) /* test bootaddr x to see if CPU started */ -#define READ_MSR_LO(x) /* Read MSR low function */ +#define KERNEL_PRINT(x) /* some kind of print function */ +#define CMOS_WRITE_BYTE(x,y) /* write unsigned char "y" at CMOS loc "x" */ +#define CMOS_READ_BYTE(x) /* read unsigned char at CMOS loc "x" */ +#define PHYS_TO_VIRTUAL(x) /* convert physical address "x" to virtual */ +#define VIRTUAL_TO_PHYS(x) /* convert virtual address "x" to physical */ +#define UDELAY(x) /* delay roughly at least "x" microsecs */ +#define TEST_BOOTED(x) /* test bootaddr x to see if CPU started */ +#define READ_MSR_LO(x) /* Read MSR low function */ #endif - /* * Includes here */ @@ -80,52 +78,51 @@ /* * Defines that are here so as not to be in the global header file. */ -#define EBDA_SEG_ADDR 0x40E -#define BIOS_RESET_VECTOR 0x467 -#define LAPIC_ADDR_DEFAULT 0xFEE00000uL -#define IOAPIC_ADDR_DEFAULT 0xFEC00000uL -#define CMOS_RESET_CODE 0xF -#define CMOS_RESET_JUMP 0xa -#define CMOS_BASE_MEMORY 0x15 - +#define EBDA_SEG_ADDR 0x40E +#define BIOS_RESET_VECTOR 0x467 +#define LAPIC_ADDR_DEFAULT 0xFEE00000uL +#define IOAPIC_ADDR_DEFAULT 0xFEC00000uL +#define CMOS_RESET_CODE 0xF +#define CMOS_RESET_JUMP 0xa +#define CMOS_BASE_MEMORY 0x15 /* * Static defines here for SMP use. */ -#define DEF_ENTRIES 23 +#define DEF_ENTRIES 23 static int lapic_dummy = 0; static struct { - imps_processor proc[2]; - imps_bus bus[2]; - imps_ioapic ioapic; - imps_interrupt intin[16]; - imps_interrupt lintin[2]; + imps_processor proc[2]; + imps_bus bus[2]; + imps_ioapic ioapic; + imps_interrupt intin[16]; + imps_interrupt lintin[2]; } defconfig = { - { { IMPS_BCT_PROCESSOR, 0, 0, 0, 0, 0}, - { IMPS_BCT_PROCESSOR, 1, 0, 0, 0, 0} }, - { { IMPS_BCT_BUS, 0, {'E', 'I', 'S', 'A', ' ', ' '}}, - { 255, 1, {'P', 'C', 'I', ' ', ' ', ' '}} }, - { IMPS_BCT_IOAPIC, 0, 0, IMPS_FLAG_ENABLED, IOAPIC_ADDR_DEFAULT }, - { { IMPS_BCT_IO_INTERRUPT, IMPS_INT_EXTINT, 0, 0, 0, 0xFF, 0}, - { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 1, 0xFF, 1}, - { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 0, 0xFF, 2}, - { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 3, 0xFF, 3}, - { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 4, 0xFF, 4}, - { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 5, 0xFF, 5}, - { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 6, 0xFF, 6}, - { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 7, 0xFF, 7}, - { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 8, 0xFF, 8}, - { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 9, 0xFF, 9}, - { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 10, 0xFF, 10}, - { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 11, 0xFF, 11}, - { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 12, 0xFF, 12}, - { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 13, 0xFF, 13}, - { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 14, 0xFF, 14}, - { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 15, 0xFF, 15} }, - { { IMPS_BCT_LOCAL_INTERRUPT, IMPS_INT_EXTINT, 0, 0, 15, 0xFF, 0}, - { IMPS_BCT_LOCAL_INTERRUPT, IMPS_INT_NMI, 0, 0, 15, 0xFF, 1} } + { { IMPS_BCT_PROCESSOR, 0, 0, 0, 0, 0}, + { IMPS_BCT_PROCESSOR, 1, 0, 0, 0, 0} }, + { { IMPS_BCT_BUS, 0, {'E', 'I', 'S', 'A', ' ', ' '}}, + { 255, 1, {'P', 'C', 'I', ' ', ' ', ' '}} }, + { IMPS_BCT_IOAPIC, 0, 0, IMPS_FLAG_ENABLED, IOAPIC_ADDR_DEFAULT }, + { { IMPS_BCT_IO_INTERRUPT, IMPS_INT_EXTINT, 0, 0, 0, 0xFF, 0}, + { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 1, 0xFF, 1}, + { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 0, 0xFF, 2}, + { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 3, 0xFF, 3}, + { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 4, 0xFF, 4}, + { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 5, 0xFF, 5}, + { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 6, 0xFF, 6}, + { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 7, 0xFF, 7}, + { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 8, 0xFF, 8}, + { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 9, 0xFF, 9}, + { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 10, 0xFF, 10}, + { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 11, 0xFF, 11}, + { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 12, 0xFF, 12}, + { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 13, 0xFF, 13}, + { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 14, 0xFF, 14}, + { IMPS_BCT_IO_INTERRUPT, IMPS_INT_INT, 0, 0, 15, 0xFF, 15} }, + { { IMPS_BCT_LOCAL_INTERRUPT, IMPS_INT_EXTINT, 0, 0, 15, 0xFF, 0}, + { IMPS_BCT_LOCAL_INTERRUPT, IMPS_INT_NMI, 0, 0, 15, 0xFF, 1} } }; /* @@ -139,376 +136,371 @@ unsigned imps_lapic_addr = ((unsigned)(&lapic_dummy)) - LAPIC_ID; unsigned char imps_cpu_apic_map[IMPS_MAX_CPUS]; unsigned char imps_apic_cpu_map[IMPS_MAX_CPUS]; - /* * MPS checksum function * * Function finished. */ - static int get_checksum(unsigned start, int length) { - unsigned sum = 0; + unsigned sum = 0; - while (length-- > 0) { - sum += *((unsigned char *) (start++)); - } + while (length-- > 0) { + sum += *((unsigned char *) (start++)); + } - return (sum&0xFF); + return (sum&0xFF); } - /* * APIC ICR write and status check function. */ - static int send_ipi(unsigned int dst, unsigned int v) { - int to, send_status; + int to, send_status; - IMPS_LAPIC_WRITE(LAPIC_ICR+0x10, (dst << 24)); - IMPS_LAPIC_WRITE(LAPIC_ICR, v); + IMPS_LAPIC_WRITE(LAPIC_ICR+0x10, (dst << 24)); + IMPS_LAPIC_WRITE(LAPIC_ICR, v); - /* Wait for send to finish */ - to = 0; - do { - UDELAY(100); - send_status = IMPS_LAPIC_READ(LAPIC_ICR) & LAPIC_ICR_STATUS_PEND; - } while (send_status && (to++ < 1000)); + /* Wait for send to finish */ + to = 0; + do { + UDELAY(100); + send_status = IMPS_LAPIC_READ(LAPIC_ICR) & LAPIC_ICR_STATUS_PEND; + } while (send_status && (to++ < 1000)); - return (to < 1000); + return (to < 1000); } - /* * Primary function for booting individual CPUs. * * This must be modified to perform whatever OS-specific initialization * that is required. */ - static int boot_cpu(imps_processor *proc) { - int apicid = proc->apic_id, success = 1, to; - unsigned bootaddr, accept_status; - unsigned bios_reset_vector = PHYS_TO_VIRTUAL(BIOS_RESET_VECTOR); - - /* - * Copy boot code for secondary CPUs here. Find it in between - * "patch_code_start" and "patch_code_end" symbols. The other CPUs - * will start there in 16-bit real mode under the 1MB boundary. - * "patch_code_start" should be placed at a 4K-aligned address - * under the 1MB boundary. - */ - - extern char patch_code_start[]; - extern char patch_code_end[]; - bootaddr = (512-64)*1024; - memcpy((char *)bootaddr, patch_code_start, patch_code_end - patch_code_start); - - /* - * Generic CPU startup sequence starts here. - */ - - /* set BIOS reset vector */ - CMOS_WRITE_BYTE(CMOS_RESET_CODE, CMOS_RESET_JUMP); - *((volatile unsigned *) bios_reset_vector) = ((bootaddr & 0xFF000) << 12); - - /* clear the APIC error register */ - IMPS_LAPIC_WRITE(LAPIC_ESR, 0); - accept_status = IMPS_LAPIC_READ(LAPIC_ESR); - - /* assert INIT IPI */ - send_ipi(apicid, LAPIC_ICR_TM_LEVEL | LAPIC_ICR_LEVELASSERT | LAPIC_ICR_DM_INIT); - - UDELAY(10000); - - /* de-assert INIT IPI */ - send_ipi(apicid, LAPIC_ICR_TM_LEVEL | LAPIC_ICR_DM_INIT); - - UDELAY(10000); - - /* - * Send Startup IPIs if not an old pre-integrated APIC. - */ - - if (proc->apic_ver >= APIC_VER_NEW) { - int i; - for (i = 1; i <= 2; i++) { - send_ipi(apicid, LAPIC_ICR_DM_SIPI | ((bootaddr >> 12) & 0xFF)); - UDELAY(1000); - } - } - - /* - * Check to see if other processor has started. - */ - to = 0; - while (!TEST_BOOTED(bootaddr) && to++ < 100) - UDELAY(10000); - if (to >= 100) { - KERNEL_PRINT(("CPU Not Responding, DISABLED")); - success = 0; - } else { - KERNEL_PRINT(("#%d Application Processor (AP)", imps_num_cpus)); - } - - /* - * Generic CPU startup sequence ends here, the rest is cleanup. - */ - - /* clear the APIC error register */ - IMPS_LAPIC_WRITE(LAPIC_ESR, 0); - accept_status = IMPS_LAPIC_READ(LAPIC_ESR); - - /* clean up BIOS reset vector */ - CMOS_WRITE_BYTE(CMOS_RESET_CODE, 0); - *((volatile unsigned *) bios_reset_vector) = 0; - - KERNEL_PRINT(("\n")); - - return success; + int apicid = proc->apic_id, success = 1, to; + unsigned bootaddr, accept_status; + unsigned bios_reset_vector = PHYS_TO_VIRTUAL(BIOS_RESET_VECTOR); + + /* + * Copy boot code for secondary CPUs here. Find it in between + * "patch_code_start" and "patch_code_end" symbols. The other CPUs + * will start there in 16-bit real mode under the 1MB boundary. + * "patch_code_start" should be placed at a 4K-aligned address + * under the 1MB boundary. + */ + + extern char patch_code_start[]; + extern char patch_code_end[]; + bootaddr = (512-64)*1024; + memcpy((char *)bootaddr, patch_code_start, patch_code_end - patch_code_start); + + /* + * Generic CPU startup sequence starts here. + */ + + /* set BIOS reset vector */ + CMOS_WRITE_BYTE(CMOS_RESET_CODE, CMOS_RESET_JUMP); + *((volatile unsigned *) bios_reset_vector) = ((bootaddr & 0xFF000) << 12); + + /* clear the APIC error register */ + IMPS_LAPIC_WRITE(LAPIC_ESR, 0); + accept_status = IMPS_LAPIC_READ(LAPIC_ESR); + + /* assert INIT IPI */ + send_ipi( + apicid, LAPIC_ICR_TM_LEVEL | LAPIC_ICR_LEVELASSERT | LAPIC_ICR_DM_INIT); + + UDELAY(10000); + + /* de-assert INIT IPI */ + send_ipi(apicid, LAPIC_ICR_TM_LEVEL | LAPIC_ICR_DM_INIT); + + UDELAY(10000); + + /* + * Send Startup IPIs if not an old pre-integrated APIC. + */ + + if (proc->apic_ver >= APIC_VER_NEW) { + int i; + for (i = 1; i <= 2; i++) { + send_ipi(apicid, LAPIC_ICR_DM_SIPI | ((bootaddr >> 12) & 0xFF)); + UDELAY(1000); + } + } + + /* + * Check to see if other processor has started. + */ + to = 0; + while (!TEST_BOOTED(bootaddr) && to++ < 100) + UDELAY(10000); + if (to >= 100) { + KERNEL_PRINT(("CPU Not Responding, DISABLED")); + success = 0; + } else { + KERNEL_PRINT(("#%d Application Processor (AP)", imps_num_cpus)); + } + + /* + * Generic CPU startup sequence ends here, the rest is cleanup. + */ + + /* clear the APIC error register */ + IMPS_LAPIC_WRITE(LAPIC_ESR, 0); + accept_status = IMPS_LAPIC_READ(LAPIC_ESR); + + /* clean up BIOS reset vector */ + CMOS_WRITE_BYTE(CMOS_RESET_CODE, 0); + *((volatile unsigned *) bios_reset_vector) = 0; + + KERNEL_PRINT(("\n")); + + return success; } - /* * read bios stuff and fill tables */ - static void add_processor(imps_processor *proc) { - int apicid = proc->apic_id; - - KERNEL_PRINT((" Processor [APIC id %d ver %d]: ", - apicid, proc->apic_ver)); - if (!(proc->flags & IMPS_FLAG_ENABLED)) { - KERNEL_PRINT(("DISABLED\n")); - return; - } - if (proc->flags & (IMPS_CPUFLAG_BOOT)) { - KERNEL_PRINT(("#0 BootStrap Processor (BSP)\n")); - return; - } - if (boot_cpu(proc)) { - - /* XXXXX add OS-specific setup for secondary CPUs here */ - - imps_cpu_apic_map[imps_num_cpus] = apicid; - imps_apic_cpu_map[apicid] = imps_num_cpus; - imps_num_cpus++; - } + int apicid = proc->apic_id; + + KERNEL_PRINT((" Processor [APIC id %d ver %d]: ", + apicid, proc->apic_ver)); + if (!(proc->flags & IMPS_FLAG_ENABLED)) { + KERNEL_PRINT(("DISABLED\n")); + return; + } + if (proc->flags & (IMPS_CPUFLAG_BOOT)) { + KERNEL_PRINT(("#0 BootStrap Processor (BSP)\n")); + return; + } + if (boot_cpu(proc)) { + + /* XXXXX add OS-specific setup for secondary CPUs here */ + + imps_cpu_apic_map[imps_num_cpus] = apicid; + imps_apic_cpu_map[apicid] = imps_num_cpus; + imps_num_cpus++; + } } static void add_bus(imps_bus *bus) { - char str[8]; + char str[8]; - memcpy(str, bus->bus_type, 6); - str[6] = 0; - KERNEL_PRINT((" Bus id %d is %s\n", bus->id, str)); + memcpy(str, bus->bus_type, 6); + str[6] = 0; + KERNEL_PRINT((" Bus id %d is %s\n", bus->id, str)); - /* XXXXX add OS-specific code here */ + /* XXXXX add OS-specific code here */ } static void add_ioapic(imps_ioapic *ioapic) { - KERNEL_PRINT((" I/O APIC id %d ver %d, address: 0x%x ", - ioapic->id, ioapic->ver, ioapic->addr)); - if (!(ioapic->flags & IMPS_FLAG_ENABLED)) { - KERNEL_PRINT(("DISABLED\n")); - return; - } - KERNEL_PRINT(("\n")); - - /* XXXXX add OS-specific code here */ + KERNEL_PRINT((" I/O APIC id %d ver %d, address: 0x%x ", + ioapic->id, ioapic->ver, ioapic->addr)); + if (!(ioapic->flags & IMPS_FLAG_ENABLED)) { + KERNEL_PRINT(("DISABLED\n")); + return; + } + KERNEL_PRINT(("\n")); + + /* XXXXX add OS-specific code here */ } - static void imps_read_config_table(unsigned start, int count) { - while (count-- > 0) { - switch (*((unsigned char *)start)) { - case IMPS_BCT_PROCESSOR: - add_processor((imps_processor *)start); - start += 12; /* 20 total */ - break; - case IMPS_BCT_BUS: - add_bus((imps_bus *)start); - break; - case IMPS_BCT_IOAPIC: - add_ioapic((imps_ioapic *)start); - break; -#if 0 /* XXXXX uncomment this if "add_io_interrupt" is implemented */ - case IMPS_BCT_IO_INTERRUPT: - add_io_interrupt((imps_interrupt *)start); - break; + while (count-- > 0) { + switch (*((unsigned char *)start)) { + case IMPS_BCT_PROCESSOR: + add_processor((imps_processor *)start); + start += 12; /* 20 total */ + break; + case IMPS_BCT_BUS: + add_bus((imps_bus *)start); + break; + case IMPS_BCT_IOAPIC: + add_ioapic((imps_ioapic *)start); + break; +#if 0 /* XXXXX uncomment this if "add_io_interrupt" is implemented */ + case IMPS_BCT_IO_INTERRUPT: + add_io_interrupt((imps_interrupt *)start); + break; #endif -#if 0 /* XXXXX uncomment this if "add_local_interrupt" is implemented */ - case IMPS_BCT_LOCAL_INTERRUPT: - add_local_interupt((imps_interrupt *)start); - break; +#if 0 /* XXXXX uncomment this if "add_local_interrupt" is implemented */ + case IMPS_BCT_LOCAL_INTERRUPT: + add_local_interupt((imps_interrupt *)start); + break; #endif - default: - break; - } - start += 8; - } + default: + break; + } + start += 8; + } } - static int imps_bad_bios(imps_fps *fps_ptr) { - int sum; - imps_cth *local_cth_ptr - = (imps_cth *) PHYS_TO_VIRTUAL(fps_ptr->cth_ptr); - - if (fps_ptr->feature_info[0] > IMPS_FPS_DEFAULT_MAX) { - KERNEL_PRINT((" Invalid MP System Configuration type %d\n", - fps_ptr->feature_info[0])); - return 1; - } - - if (fps_ptr->cth_ptr) { - sum = get_checksum((unsigned)local_cth_ptr, + int sum; + imps_cth *local_cth_ptr + = (imps_cth *) PHYS_TO_VIRTUAL(fps_ptr->cth_ptr); + + if (fps_ptr->feature_info[0] > IMPS_FPS_DEFAULT_MAX) { + KERNEL_PRINT((" Invalid MP System Configuration type %d\n", + fps_ptr->feature_info[0])); + return 1; + } + + if (fps_ptr->cth_ptr) { + sum = get_checksum((unsigned)local_cth_ptr, local_cth_ptr->base_length); - if (local_cth_ptr->sig != IMPS_CTH_SIGNATURE || sum) { - KERNEL_PRINT((" Bad MP Config Table sig 0x%x and/or checksum 0x%x\n", (unsigned)(fps_ptr->cth_ptr), sum)); - return 1; - } - if (local_cth_ptr->spec_rev != fps_ptr->spec_rev) { - KERNEL_PRINT((" Bad MP Config Table sub-revision # %d\n", local_cth_ptr->spec_rev)); - return 1; - } - if (local_cth_ptr->extended_length) { - sum = (get_checksum(((unsigned)local_cth_ptr) - + local_cth_ptr->base_length, - local_cth_ptr->extended_length) - + local_cth_ptr->extended_checksum) & 0xFF; - if (sum) { - KERNEL_PRINT((" Bad Extended MP Config Table checksum 0x%x\n", sum)); - return 1; - } - } - } else if (!fps_ptr->feature_info[0]) { - KERNEL_PRINT((" Missing configuration information\n")); - return 1; - } - - return 0; + if (local_cth_ptr->sig != IMPS_CTH_SIGNATURE || sum) { + KERNEL_PRINT( + (" Bad MP Config Table sig 0x%x and/or checksum 0x%x\n", + (unsigned)(fps_ptr->cth_ptr), + sum) + ); + return 1; + } + if (local_cth_ptr->spec_rev != fps_ptr->spec_rev) { + KERNEL_PRINT( + (" Bad MP Config Table sub-revision # %d\n", + local_cth_ptr->spec_rev) + ); + return 1; + } + if (local_cth_ptr->extended_length) { + sum = (get_checksum(((unsigned)local_cth_ptr) + + local_cth_ptr->base_length, + local_cth_ptr->extended_length) + + local_cth_ptr->extended_checksum) & 0xFF; + if (sum) { + KERNEL_PRINT((" Bad Extended MP Config Table checksum 0x%x\n", sum)); + return 1; + } + } + } else if (!fps_ptr->feature_info[0]) { + KERNEL_PRINT((" Missing configuration information\n")); + return 1; + } + + return 0; } - static void imps_read_bios(imps_fps *fps_ptr) { - int apicid; - unsigned cth_start, cth_count; - imps_cth *local_cth_ptr - = (imps_cth *)PHYS_TO_VIRTUAL(fps_ptr->cth_ptr); - char *str_ptr; - - KERNEL_PRINT(("Intel MultiProcessor Spec 1.%d BIOS support detected\n", - fps_ptr->spec_rev)); - - /* - * Do all checking of errors which would definitely - * lead to failure of the SMP boot here. - */ - - if (imps_bad_bios(fps_ptr)) { - KERNEL_PRINT((" Disabling MPS support\n")); - return; - } - - if (fps_ptr->feature_info[1] & IMPS_FPS_IMCRP_BIT) { - str_ptr = "IMCR and PIC"; - } else { - str_ptr = "Virtual Wire"; - } - if (fps_ptr->cth_ptr) { - imps_lapic_addr = local_cth_ptr->lapic_addr; - } else { - imps_lapic_addr = LAPIC_ADDR_DEFAULT; - } - KERNEL_PRINT((" APIC config: \"%s mode\" Local APIC address: 0x%x\n", - str_ptr, imps_lapic_addr)); - if (imps_lapic_addr != (READ_MSR_LO(0x1b) & 0xFFFFF000)) { - KERNEL_PRINT(("Inconsistent Local APIC address, Disabling SMP support\n")); - return; - } - imps_lapic_addr = PHYS_TO_VIRTUAL(imps_lapic_addr); - - /* - * Setup primary CPU. - */ - apicid = IMPS_LAPIC_READ(LAPIC_SPIV); - IMPS_LAPIC_WRITE(LAPIC_SPIV, apicid|LAPIC_SPIV_ENABLE_APIC); - apicid = APIC_ID(IMPS_LAPIC_READ(LAPIC_ID)); - imps_cpu_apic_map[0] = apicid; - imps_apic_cpu_map[apicid] = 0; - - if (fps_ptr->cth_ptr) { - char str1[16], str2[16]; - memcpy(str1, local_cth_ptr->oem_id, 8); - str1[8] = 0; - memcpy(str2, local_cth_ptr->prod_id, 12); - str2[12] = 0; - KERNEL_PRINT((" OEM id: %s Product id: %s\n", str1, str2)); - cth_start = ((unsigned) local_cth_ptr) + sizeof(imps_cth); - cth_count = local_cth_ptr->entry_count; - } else { - *((volatile unsigned *) IOAPIC_ADDR_DEFAULT) = IOAPIC_ID; - defconfig.ioapic.id - = APIC_ID(*((volatile unsigned *) - (IOAPIC_ADDR_DEFAULT+IOAPIC_RW))); - *((volatile unsigned *) IOAPIC_ADDR_DEFAULT) = IOAPIC_VER; - defconfig.ioapic.ver - = APIC_VERSION(*((volatile unsigned *) - (IOAPIC_ADDR_DEFAULT+IOAPIC_RW))); - defconfig.proc[apicid].flags - = IMPS_FLAG_ENABLED|IMPS_CPUFLAG_BOOT; - defconfig.proc[!apicid].flags = IMPS_FLAG_ENABLED; - imps_num_cpus = 2; - if (fps_ptr->feature_info[0] == 1 - || fps_ptr->feature_info[0] == 5) { - memcpy(defconfig.bus[0].bus_type, "ISA ", 6); - } - if (fps_ptr->feature_info[0] == 4 - || fps_ptr->feature_info[0] == 7) { - memcpy(defconfig.bus[0].bus_type, "MCA ", 6); - } - if (fps_ptr->feature_info[0] > 4) { - defconfig.proc[0].apic_ver = 0x10; - defconfig.proc[1].apic_ver = 0x10; - defconfig.bus[1].type = IMPS_BCT_BUS; - } - if (fps_ptr->feature_info[0] == 2) { - defconfig.intin[2].type = 255; - defconfig.intin[13].type = 255; - } - if (fps_ptr->feature_info[0] == 7) { - defconfig.intin[0].type = 255; - } - cth_start = (unsigned) &defconfig; - cth_count = DEF_ENTRIES; - } - imps_read_config_table(cth_start, cth_count); - - /* %%%%% ESB read extended entries here */ - - imps_enabled = 1; + int apicid; + unsigned cth_start, cth_count; + imps_cth *local_cth_ptr + = (imps_cth *)PHYS_TO_VIRTUAL(fps_ptr->cth_ptr); + char *str_ptr; + + KERNEL_PRINT(("Intel MultiProcessor Spec 1.%d BIOS support detected\n", + fps_ptr->spec_rev)); + + /* + * Do all checking of errors which would definitely + * lead to failure of the SMP boot here. + */ + if (imps_bad_bios(fps_ptr)) { + KERNEL_PRINT((" Disabling MPS support\n")); + return; + } + + if (fps_ptr->feature_info[1] & IMPS_FPS_IMCRP_BIT) { + str_ptr = "IMCR and PIC"; + } else { + str_ptr = "Virtual Wire"; + } + if (fps_ptr->cth_ptr) { + imps_lapic_addr = local_cth_ptr->lapic_addr; + } else { + imps_lapic_addr = LAPIC_ADDR_DEFAULT; + } + KERNEL_PRINT((" APIC config: \"%s mode\" Local APIC address: 0x%x\n", + str_ptr, imps_lapic_addr)); + if (imps_lapic_addr != (READ_MSR_LO(0x1b) & 0xFFFFF000)) { + KERNEL_PRINT(("Inconsistent Local APIC address, Disabling SMP support\n")); + return; + } + imps_lapic_addr = PHYS_TO_VIRTUAL(imps_lapic_addr); + + /* + * Setup primary CPU. + */ + apicid = IMPS_LAPIC_READ(LAPIC_SPIV); + IMPS_LAPIC_WRITE(LAPIC_SPIV, apicid|LAPIC_SPIV_ENABLE_APIC); + apicid = APIC_ID(IMPS_LAPIC_READ(LAPIC_ID)); + imps_cpu_apic_map[0] = apicid; + imps_apic_cpu_map[apicid] = 0; + + if (fps_ptr->cth_ptr) { + char str1[16], str2[16]; + memcpy(str1, local_cth_ptr->oem_id, 8); + str1[8] = 0; + memcpy(str2, local_cth_ptr->prod_id, 12); + str2[12] = 0; + KERNEL_PRINT((" OEM id: %s Product id: %s\n", str1, str2)); + cth_start = ((unsigned) local_cth_ptr) + sizeof(imps_cth); + cth_count = local_cth_ptr->entry_count; + } else { + *((volatile unsigned *) IOAPIC_ADDR_DEFAULT) = IOAPIC_ID; + defconfig.ioapic.id + = APIC_ID(*((volatile unsigned *) + (IOAPIC_ADDR_DEFAULT+IOAPIC_RW))); + *((volatile unsigned *) IOAPIC_ADDR_DEFAULT) = IOAPIC_VER; + defconfig.ioapic.ver + = APIC_VERSION(*((volatile unsigned *) + (IOAPIC_ADDR_DEFAULT+IOAPIC_RW))); + defconfig.proc[apicid].flags + = IMPS_FLAG_ENABLED|IMPS_CPUFLAG_BOOT; + defconfig.proc[!apicid].flags = IMPS_FLAG_ENABLED; + imps_num_cpus = 2; + if (fps_ptr->feature_info[0] == 1 + || fps_ptr->feature_info[0] == 5) { + memcpy(defconfig.bus[0].bus_type, "ISA ", 6); + } + if (fps_ptr->feature_info[0] == 4 + || fps_ptr->feature_info[0] == 7) { + memcpy(defconfig.bus[0].bus_type, "MCA ", 6); + } + if (fps_ptr->feature_info[0] > 4) { + defconfig.proc[0].apic_ver = 0x10; + defconfig.proc[1].apic_ver = 0x10; + defconfig.bus[1].type = IMPS_BCT_BUS; + } + if (fps_ptr->feature_info[0] == 2) { + defconfig.intin[2].type = 255; + defconfig.intin[13].type = 255; + } + if (fps_ptr->feature_info[0] == 7) { + defconfig.intin[0].type = 255; + } + cth_start = (unsigned) &defconfig; + cth_count = DEF_ENTRIES; + } + imps_read_config_table(cth_start, cth_count); + + /* %%%%% ESB read extended entries here */ + + imps_enabled = 1; } - /* * Given a region to check, this actually looks for the "MP Floating * Pointer Structure". The return value indicates if the correct @@ -523,30 +515,29 @@ imps_read_bios(imps_fps *fps_ptr) * * Function finished. */ - static int imps_scan(unsigned start, unsigned length) { - IMPS_DEBUG_PRINT(("Scanning from 0x%x for %d bytes\n", - start, length)); - - while (length > 0) { - imps_fps *fps_ptr = (imps_fps *) PHYS_TO_VIRTUAL(start); - - if (fps_ptr->sig == IMPS_FPS_SIGNATURE - && fps_ptr->length == 1 - && (fps_ptr->spec_rev == 1 || fps_ptr->spec_rev == 4) - && !get_checksum(start, 16)) { - IMPS_DEBUG_PRINT(("Found MP Floating Structure Pointer at %x\n", start)); - imps_read_bios(fps_ptr); - return 1; - } - - length -= 16; - start += 16; - } - - return 0; + IMPS_DEBUG_PRINT(("Scanning from 0x%x for %d bytes\n", + start, length)); + + while (length > 0) { + imps_fps *fps_ptr = (imps_fps *) PHYS_TO_VIRTUAL(start); + + if (fps_ptr->sig == IMPS_FPS_SIGNATURE + && fps_ptr->length == 1 + && (fps_ptr->spec_rev == 1 || fps_ptr->spec_rev == 4) + && !get_checksum(start, 16)) { + IMPS_DEBUG_PRINT(("Found MP Floating Structure Pointer at %x\n", start)); + imps_read_bios(fps_ptr); + return 1; + } + + length -= 16; + start += 16; + } + + return 0; } /* @@ -556,41 +547,40 @@ imps_scan(unsigned start, unsigned length) int imps_force(int ncpus) { - int apicid, i; - imps_processor p; - - KERNEL_PRINT(("Intel MultiProcessor \"Force\" Support\n")); - - imps_lapic_addr = (READ_MSR_LO(0x1b) & 0xFFFFF000); - imps_lapic_addr = PHYS_TO_VIRTUAL(imps_lapic_addr); - - /* - * Setup primary CPU. - */ - apicid = IMPS_LAPIC_READ(LAPIC_SPIV); - IMPS_LAPIC_WRITE(LAPIC_SPIV, apicid|LAPIC_SPIV_ENABLE_APIC); - apicid = APIC_ID(IMPS_LAPIC_READ(LAPIC_ID)); - imps_cpu_apic_map[0] = apicid; - imps_apic_cpu_map[apicid] = 0; - - p.type = 0; - p.apic_ver = 0x10; - p.signature = p.features = 0; - - for (i = 0; i < ncpus; i++) { - if (apicid == i) { - p.flags = IMPS_FLAG_ENABLED | IMPS_CPUFLAG_BOOT; - } else { - p.flags = IMPS_FLAG_ENABLED; - } - p.apic_id = i; - add_processor(&p); - } - - return imps_num_cpus; + int apicid, i; + imps_processor p; + + KERNEL_PRINT(("Intel MultiProcessor \"Force\" Support\n")); + + imps_lapic_addr = (READ_MSR_LO(0x1b) & 0xFFFFF000); + imps_lapic_addr = PHYS_TO_VIRTUAL(imps_lapic_addr); + + /* + * Setup primary CPU. + */ + apicid = IMPS_LAPIC_READ(LAPIC_SPIV); + IMPS_LAPIC_WRITE(LAPIC_SPIV, apicid|LAPIC_SPIV_ENABLE_APIC); + apicid = APIC_ID(IMPS_LAPIC_READ(LAPIC_ID)); + imps_cpu_apic_map[0] = apicid; + imps_apic_cpu_map[apicid] = 0; + + p.type = 0; + p.apic_ver = 0x10; + p.signature = p.features = 0; + + for (i = 0; i < ncpus; i++) { + if (apicid == i) { + p.flags = IMPS_FLAG_ENABLED | IMPS_CPUFLAG_BOOT; + } else { + p.flags = IMPS_FLAG_ENABLED; + } + p.apic_id = i; + add_processor(&p); + } + + return imps_num_cpus; } - /* * This is the primary function for probing for MPS compatible hardware * and BIOS information. Call this during the early stages of OS startup, @@ -602,73 +592,72 @@ imps_force(int ncpus) * Environment requirements from the OS to run: * * (1) : A non-linear virtual to physical memory mapping is probably OK, - * as (I think) the structures all fall within page boundaries, - * but a linear mapping is recommended. Currently assumes that - * the mapping will remain identical over time (which should be - * OK since it only accesses memory which shouldn't be munged - * by the OS anyway). + * as (I think) the structures all fall within page boundaries, + * but a linear mapping is recommended. Currently assumes that + * the mapping will remain identical over time (which should be + * OK since it only accesses memory which shouldn't be munged + * by the OS anyway). * (2) : The OS only consumes memory which the BIOS says is OK to use, - * and not any of the BIOS standard areas (the areas 0x400 to - * 0x600, the EBDA, 0xE0000 to 0xFFFFF, and unreported physical - * RAM). Sometimes a small amount of physical RAM is not - * reported by the BIOS, to be used to store MPS and other - * information. + * and not any of the BIOS standard areas (the areas 0x400 to + * 0x600, the EBDA, 0xE0000 to 0xFFFFF, and unreported physical + * RAM). Sometimes a small amount of physical RAM is not + * reported by the BIOS, to be used to store MPS and other + * information. * (3) : It must be possible to read the CMOS. * (4) : There must be between 512K and 640K of lower memory (this is a - * sanity check). + * sanity check). * * Function finished. */ - int imps_probe(void) { - /* - * Determine possible address of the EBDA - */ - unsigned ebda_addr = *((unsigned short *) - PHYS_TO_VIRTUAL(EBDA_SEG_ADDR)) << 4; - - /* - * Determine amount of installed lower memory (not *available* - * lower memory). - * - * NOTE: This should work reliably as long as we verify the - * machine is at least a system that could possibly have - * MPS compatibility to begin with. - */ - unsigned mem_lower = ((CMOS_READ_BYTE(CMOS_BASE_MEMORY+1) << 8) - | CMOS_READ_BYTE(CMOS_BASE_MEMORY)) << 10; + /* + * Determine possible address of the EBDA + */ + unsigned ebda_addr = *((unsigned short *) + PHYS_TO_VIRTUAL(EBDA_SEG_ADDR)) << 4; + + /* + * Determine amount of installed lower memory (not *available* + * lower memory). + * + * NOTE: This should work reliably as long as we verify the + * machine is at least a system that could possibly have + * MPS compatibility to begin with. + */ + unsigned mem_lower = ((CMOS_READ_BYTE(CMOS_BASE_MEMORY+1) << 8) + | CMOS_READ_BYTE(CMOS_BASE_MEMORY)) << 10; #ifdef IMPS_DEBUG - imps_enabled = 0; - imps_num_cpus = 1; + imps_enabled = 0; + imps_num_cpus = 1; #endif - /* - * Sanity check : if this isn't reasonable, it is almost impossibly - * unlikely to be an MPS compatible machine, so return failure. - */ - if (mem_lower < 512*1024 || mem_lower > 640*1024) { - return 0; - } + /* + * Sanity check : if this isn't reasonable, it is almost impossibly + * unlikely to be an MPS compatible machine, so return failure. + */ + if (mem_lower < 512*1024 || mem_lower > 640*1024) { + return 0; + } - if (ebda_addr > mem_lower - 1024 - || ebda_addr + *((unsigned char *) PHYS_TO_VIRTUAL(ebda_addr)) + if (ebda_addr > mem_lower - 1024 + || ebda_addr + *((unsigned char *) PHYS_TO_VIRTUAL(ebda_addr)) * 1024 > mem_lower) { - ebda_addr = 0; - } + ebda_addr = 0; + } - if (((ebda_addr && imps_scan(ebda_addr, 1024)) - || (!ebda_addr && imps_scan(mem_lower - 1024, 1024)) - || imps_scan(0xF0000, 0x10000)) && imps_enabled) { - return imps_num_cpus; - } + if (((ebda_addr && imps_scan(ebda_addr, 1024)) + || (!ebda_addr && imps_scan(mem_lower - 1024, 1024)) + || imps_scan(0xF0000, 0x10000)) && imps_enabled) { + return imps_num_cpus; + } - /* - * If no BIOS info on MPS hardware is found, then return failure. - */ + /* + * If no BIOS info on MPS hardware is found, then return failure. + */ - return 0; + return 0; } |