fw-emu.c
上传用户:lgb322
上传日期:2013-02-24
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文件大小:15k
- /*
- * PAL & SAL emulation.
- *
- * Copyright (C) 1998-2000 Hewlett-Packard Co
- * Copyright (C) 1998-2000 David Mosberger-Tang <davidm@hpl.hp.com>
- *
- *
- * Copyright (C) 2000 Silicon Graphics, Inc.
- * Copyright (C) 2000 by Jack Steiner (steiner@sgi.com)
- */
- #include <asm/efi.h>
- #include <asm/pal.h>
- #include <asm/sal.h>
- #include <asm/processor.h>
- #include <asm/acpi-ext.h>
- #include "fpmem.h"
- #define MB (1024*1024UL)
- #define GB (MB*1024UL)
- #define FPROM_BUG() do {while (1);} while (0)
- #define MAX_NODES 128
- #define MAX_LSAPICS 512
- #define MAX_CPUS 512
- #define MAX_CPUS_NODE 4
- #define CPUS_PER_NODE 4
- #define CPUS_PER_FSB 2
- #define CPUS_PER_FSB_MASK (CPUS_PER_FSB-1)
- #define NUM_EFI_DESCS 2
- typedef union ia64_nasid_va {
- struct {
- unsigned long off : 33; /* intra-region offset */
- unsigned long nasid : 7; /* NASID */
- unsigned long off2 : 21; /* fill */
- unsigned long reg : 3; /* region number */
- } f;
- unsigned long l;
- void *p;
- } ia64_nasid_va;
- typedef struct {
- unsigned long pc;
- unsigned long gp;
- } func_ptr_t;
-
- #define IS_VIRTUAL_MODE() ({struct ia64_psr psr; asm("mov %0=psr" : "=r"(psr)); psr.dt;})
- #define ADDR_OF(p) (IS_VIRTUAL_MODE() ? ((void*)((long)(p)+PAGE_OFFSET)) : ((void*) (p)))
- #define __fwtab_pa(n,x) ({ia64_nasid_va _v; _v.l = (long) (x); _v.f.nasid = (x) ? (n) : 0; _v.f.reg = 0; _v.l;})
- /*
- * The following variables are passed thru registersfrom the configuration file and
- * are set via the _start function.
- */
- long base_nasid;
- long num_cpus;
- long bsp_entry_pc=0;
- long num_nodes;
- long app_entry_pc;
- int bsp_lid;
- func_ptr_t ap_entry;
- static efi_runtime_services_t *efi_runtime_p;
- static char fw_mem[( sizeof(efi_system_table_t)
- + sizeof(efi_runtime_services_t)
- + NUM_EFI_DESCS*sizeof(efi_config_table_t)
- + sizeof(struct ia64_sal_systab)
- + sizeof(struct ia64_sal_desc_entry_point)
- + sizeof(struct ia64_sal_desc_ap_wakeup)
- + sizeof(acpi_rsdp_t)
- + sizeof(acpi_rsdt_t)
- + sizeof(acpi_sapic_t)
- + MAX_LSAPICS*(sizeof(acpi_entry_lsapic_t))
- + (1+8*MAX_NODES)*(sizeof(efi_memory_desc_t))
- + sizeof(ia64_sal_desc_ptc_t) +
- + MAX_NODES*sizeof(ia64_sal_ptc_domain_info_t) +
- + MAX_CPUS*sizeof(ia64_sal_ptc_domain_proc_entry_t) +
- + 1024)] __attribute__ ((aligned (8)));
- /*
- * Very ugly, but we need this in the simulator only. Once we run on
- * real hw, this can all go away.
- */
- extern void pal_emulator_static (void);
- asm ("
- .text
- .proc pal_emulator_static
- pal_emulator_static:
- mov r8=-1;;
- cmp.eq p6,p7=6,r28;; /* PAL_PTCE_INFO */
- (p7) br.cond.sptk.few 1f
- ;;
- mov r8=0 /* status = 0 */
- movl r9=0x500000000 /* tc.base */
- movl r10=0x0000000200000003 /* count[0], count[1] */
- movl r11=0x1000000000002000 /* stride[0], stride[1] */
- br.cond.sptk.few rp
- 1: cmp.eq p6,p7=14,r28;; /* PAL_FREQ_RATIOS */
- (p7) br.cond.sptk.few 1f;;
- mov r8=0 /* status = 0 */
- movl r9 =0x100000064 /* proc_ratio (1/100) */
- movl r10=0x100000100 /* bus_ratio<<32 (1/256) */
- movl r11=0x10000000a /* itc_ratio<<32 (1/100) */
- 1: cmp.eq p6,p7=22,r28;; /* PAL_MC_DRAIN */
- (p7) br.cond.sptk.few 1f;;
- mov r8=0
- br.cond.sptk.few rp
- 1: cmp.eq p6,p7=23,r28;; /* PAL_MC_EXPECTED */
- (p7) br.cond.sptk.few 1f;;
- mov r8=0
- br.cond.sptk.few rp
- 1: br.cond.sptk.few rp
- .endp pal_emulator_staticn");
- static efi_status_t
- efi_get_time (efi_time_t *tm, efi_time_cap_t *tc)
- {
- if (tm) {
- memset(tm, 0, sizeof(*tm));
- tm->year = 2000;
- tm->month = 2;
- tm->day = 13;
- tm->hour = 10;
- tm->minute = 11;
- tm->second = 12;
- }
- if (tc) {
- tc->resolution = 10;
- tc->accuracy = 12;
- tc->sets_to_zero = 1;
- }
- return EFI_SUCCESS;
- }
- static void
- efi_reset_system (int reset_type, efi_status_t status, unsigned long data_size, efi_char16_t *data)
- {
- while(1); /* Is there a pseudo-op to stop medusa */
- }
- static efi_status_t
- efi_success (void)
- {
- return EFI_SUCCESS;
- }
- static efi_status_t
- efi_unimplemented (void)
- {
- return EFI_UNSUPPORTED;
- }
- static long
- sal_emulator (long index, unsigned long in1, unsigned long in2,
- unsigned long in3, unsigned long in4, unsigned long in5,
- unsigned long in6, unsigned long in7)
- {
- register long r9 asm ("r9") = 0;
- register long r10 asm ("r10") = 0;
- register long r11 asm ("r11") = 0;
- long status;
- /*
- * Don't do a "switch" here since that gives us code that
- * isn't self-relocatable.
- */
- status = 0;
- if (index == SAL_FREQ_BASE) {
- switch (in1) {
- case SAL_FREQ_BASE_PLATFORM:
- r9 = 500000000;
- break;
- case SAL_FREQ_BASE_INTERVAL_TIMER:
- /*
- * Is this supposed to be the cr.itc frequency
- * or something platform specific? The SAL
- * doc ain't exactly clear on this...
- */
- r9 = 700000000;
- break;
- case SAL_FREQ_BASE_REALTIME_CLOCK:
- r9 = 1;
- break;
- default:
- status = -1;
- break;
- }
- } else if (index == SAL_SET_VECTORS) {
- if (in1 == SAL_VECTOR_OS_BOOT_RENDEZ) {
- func_ptr_t *fp;
- fp = ADDR_OF(&ap_entry);
- fp->pc = in2;
- fp->gp = in3;
- } else {
- status = -1;
- }
- ;
- } else if (index == SAL_GET_STATE_INFO) {
- ;
- } else if (index == SAL_GET_STATE_INFO_SIZE) {
- ;
- } else if (index == SAL_CLEAR_STATE_INFO) {
- ;
- } else if (index == SAL_MC_RENDEZ) {
- ;
- } else if (index == SAL_MC_SET_PARAMS) {
- ;
- } else if (index == SAL_CACHE_FLUSH) {
- ;
- } else if (index == SAL_CACHE_INIT) {
- ;
- } else if (index == SAL_UPDATE_PAL) {
- ;
- } else {
- status = -1;
- }
- asm volatile ("" :: "r"(r9), "r"(r10), "r"(r11));
- return status;
- }
- /*
- * This is here to work around a bug in egcs-1.1.1b that causes the
- * compiler to crash (seems like a bug in the new alias analysis code.
- */
- void *
- id (long addr)
- {
- return (void *) addr;
- }
- /*
- * Fix the addresses in a function pointer by adding base node address
- * to pc & gp.
- */
- void
- fix_function_pointer(void *fp)
- {
- func_ptr_t *_fp;
- _fp = fp;
- _fp->pc = __fwtab_pa(base_nasid, _fp->pc);
- _fp->gp = __fwtab_pa(base_nasid, _fp->gp);
- }
- void
- fix_virt_function_pointer(void *fptr)
- {
- func_ptr_t *fp;
- fp = fptr;
- fp->pc = fp->pc | PAGE_OFFSET;
- fp->gp = fp->gp | PAGE_OFFSET;
- }
- int
- efi_set_virtual_address_map(void)
- {
- efi_runtime_services_t *runtime;
- runtime = efi_runtime_p;
- fix_virt_function_pointer((void*)runtime->get_time);
- fix_virt_function_pointer((void*)runtime->set_time);
- fix_virt_function_pointer((void*)runtime->get_wakeup_time);
- fix_virt_function_pointer((void*)runtime->set_wakeup_time);
- fix_virt_function_pointer((void*)runtime->set_virtual_address_map);
- fix_virt_function_pointer((void*)runtime->get_variable);
- fix_virt_function_pointer((void*)runtime->get_next_variable);
- fix_virt_function_pointer((void*)runtime->set_variable);
- fix_virt_function_pointer((void*)runtime->get_next_high_mono_count);
- fix_virt_function_pointer((void*)runtime->reset_system);
- return EFI_SUCCESS;;
- }
- void
- sys_fw_init (const char *args, int arglen, int bsp)
- {
- /*
- * Use static variables to keep from overflowing the RSE stack
- */
- static efi_system_table_t *efi_systab;
- static efi_runtime_services_t *efi_runtime;
- static efi_config_table_t *efi_tables;
- static ia64_sal_desc_ptc_t *sal_ptc;
- static ia64_sal_ptc_domain_info_t *sal_ptcdi;
- static ia64_sal_ptc_domain_proc_entry_t *sal_ptclid;
- static acpi_rsdp_t *acpi_systab;
- static acpi_rsdt_t *acpi_rsdt;
- static acpi_sapic_t *acpi_sapic;
- static acpi_entry_lsapic_t *acpi_lsapic;
- static struct ia64_sal_systab *sal_systab;
- static efi_memory_desc_t *efi_memmap, *md;
- static unsigned long *pal_desc, *sal_desc;
- static struct ia64_sal_desc_entry_point *sal_ed;
- static struct ia64_boot_param *bp;
- static struct ia64_sal_desc_ap_wakeup *sal_apwake;
- static unsigned char checksum = 0;
- static char *cp, *cmd_line, *vendor;
- static int mdsize, domain, last_domain ;
- static int cnode, nasid, cpu, num_memmd, cpus_found;
- /*
- * Pass the parameter base address to the build_efi_xxx routines.
- */
- build_init(8LL*GB*base_nasid);
- num_nodes = GetNumNodes();
- num_cpus = GetNumCpus();
- memset(fw_mem, 0, sizeof(fw_mem));
- pal_desc = (unsigned long *) &pal_emulator_static;
- sal_desc = (unsigned long *) &sal_emulator;
- fix_function_pointer(&pal_emulator_static);
- fix_function_pointer(&sal_emulator);
- /* Align this to 16 bytes, probably EFI does this */
- mdsize = (sizeof(efi_memory_desc_t) + 15) & ~15 ;
- cp = fw_mem;
- efi_systab = (void *) cp; cp += sizeof(*efi_systab);
- efi_runtime_p = efi_runtime = (void *) cp; cp += sizeof(*efi_runtime);
- efi_tables = (void *) cp; cp += NUM_EFI_DESCS*sizeof(*efi_tables);
- sal_systab = (void *) cp; cp += sizeof(*sal_systab);
- sal_ed = (void *) cp; cp += sizeof(*sal_ed);
- sal_ptc = (void *) cp; cp += sizeof(*sal_ptc);
- sal_apwake = (void *) cp; cp += sizeof(*sal_apwake);
- acpi_systab = (void *) cp; cp += sizeof(*acpi_systab);
- acpi_rsdt = (void *) cp; cp += sizeof(*acpi_rsdt);
- acpi_sapic = (void *) cp; cp += sizeof(*acpi_sapic);
- acpi_lsapic = (void *) cp; cp += num_cpus*sizeof(*acpi_lsapic);
- vendor = (char *) cp; cp += 32;
- efi_memmap = (void *) cp; cp += 8*32*sizeof(*efi_memmap);
- sal_ptcdi = (void *) cp; cp += CPUS_PER_FSB*(1+num_nodes)*sizeof(*sal_ptcdi);
- sal_ptclid = (void *) cp; cp += ((3+num_cpus)*sizeof(*sal_ptclid)+7)/8*8;
- cmd_line = (void *) cp;
- if (args) {
- if (arglen >= 1024)
- arglen = 1023;
- memcpy(cmd_line, args, arglen);
- } else {
- arglen = 0;
- }
- cmd_line[arglen] = ' ';
- #ifdef BRINGUP
- /* for now, just bring up bash */
- strcpy(cmd_line, "init=/bin/bash");
- #else
- strcpy(cmd_line, "");
- #endif
- memset(efi_systab, 0, sizeof(efi_systab));
- efi_systab->hdr.signature = EFI_SYSTEM_TABLE_SIGNATURE;
- efi_systab->hdr.revision = EFI_SYSTEM_TABLE_REVISION;
- efi_systab->hdr.headersize = sizeof(efi_systab->hdr);
- efi_systab->fw_vendor = __fwtab_pa(base_nasid, vendor);
- efi_systab->fw_revision = 1;
- efi_systab->runtime = __fwtab_pa(base_nasid, efi_runtime);
- efi_systab->nr_tables = 2;
- efi_systab->tables = __fwtab_pa(base_nasid, efi_tables);
- memcpy(vendor, "S i l i c o n - G r a p h i c s ", 32);
- efi_runtime->hdr.signature = EFI_RUNTIME_SERVICES_SIGNATURE;
- efi_runtime->hdr.revision = EFI_RUNTIME_SERVICES_REVISION;
- efi_runtime->hdr.headersize = sizeof(efi_runtime->hdr);
- efi_runtime->get_time = __fwtab_pa(base_nasid, &efi_get_time);
- efi_runtime->set_time = __fwtab_pa(base_nasid, &efi_unimplemented);
- efi_runtime->get_wakeup_time = __fwtab_pa(base_nasid, &efi_unimplemented);
- efi_runtime->set_wakeup_time = __fwtab_pa(base_nasid, &efi_unimplemented);
- efi_runtime->set_virtual_address_map = __fwtab_pa(base_nasid, &efi_set_virtual_address_map);
- efi_runtime->get_variable = __fwtab_pa(base_nasid, &efi_unimplemented);
- efi_runtime->get_next_variable = __fwtab_pa(base_nasid, &efi_unimplemented);
- efi_runtime->set_variable = __fwtab_pa(base_nasid, &efi_unimplemented);
- efi_runtime->get_next_high_mono_count = __fwtab_pa(base_nasid, &efi_unimplemented);
- efi_runtime->reset_system = __fwtab_pa(base_nasid, &efi_reset_system);
- efi_tables->guid = SAL_SYSTEM_TABLE_GUID;
- efi_tables->table = __fwtab_pa(base_nasid, sal_systab);
- efi_tables++;
- efi_tables->guid = ACPI_TABLE_GUID;
- efi_tables->table = __fwtab_pa(base_nasid, acpi_systab);
- fix_function_pointer(&efi_unimplemented);
- fix_function_pointer(&efi_get_time);
- fix_function_pointer(&efi_success);
- fix_function_pointer(&efi_reset_system);
- fix_function_pointer(&efi_set_virtual_address_map);
- /* fill in the ACPI system table: */
- memcpy(acpi_systab->signature, "RSD PTR ", 8);
- acpi_systab->rsdt = (struct acpi_rsdt*)__fwtab_pa(base_nasid, acpi_rsdt);
- memcpy(acpi_rsdt->header.signature, "RSDT",4);
- acpi_rsdt->header.length = sizeof(acpi_rsdt_t);
- memcpy(acpi_rsdt->header.oem_id, "SGI", 3);
- memcpy(acpi_rsdt->header.oem_table_id, "SN1", 3);
- acpi_rsdt->header.oem_revision = 0x00010001;
- acpi_rsdt->entry_ptrs[0] = __fwtab_pa(base_nasid, acpi_sapic);
- memcpy(acpi_sapic->header.signature, "SPIC ", 4);
- acpi_sapic->header.length = sizeof(acpi_sapic_t)+num_cpus*sizeof(acpi_entry_lsapic_t);
- for (cnode=0; cnode<num_nodes; cnode++) {
- nasid = GetNasid(cnode);
- for(cpu=0; cpu<CPUS_PER_NODE; cpu++) {
- if (!IsCpuPresent(cnode, cpu))
- continue;
- acpi_lsapic->type = ACPI_ENTRY_LOCAL_SAPIC;
- acpi_lsapic->length = sizeof(acpi_entry_lsapic_t);
- acpi_lsapic->acpi_processor_id = cnode*4+cpu;
- acpi_lsapic->flags = LSAPIC_ENABLED|LSAPIC_PRESENT;
- acpi_lsapic->eid = cpu;
- acpi_lsapic->id = nasid;
- acpi_lsapic++;
- }
- }
- /* fill in the SAL system table: */
- memcpy(sal_systab->signature, "SST_", 4);
- sal_systab->size = sizeof(*sal_systab);
- sal_systab->sal_rev_minor = 1;
- sal_systab->sal_rev_major = 0;
- sal_systab->entry_count = 3;
- strcpy(sal_systab->oem_id, "SGI");
- strcpy(sal_systab->product_id, "SN1");
- /* fill in an entry point: */
- sal_ed->type = SAL_DESC_ENTRY_POINT;
- sal_ed->pal_proc = __fwtab_pa(base_nasid, pal_desc[0]);
- sal_ed->sal_proc = __fwtab_pa(base_nasid, sal_desc[0]);
- sal_ed->gp = __fwtab_pa(base_nasid, sal_desc[1]);
- /* kludge the PTC domain info */
- sal_ptc->type = SAL_DESC_PTC;
- sal_ptc->num_domains = 0;
- sal_ptc->domain_info = __fwtab_pa(base_nasid, sal_ptcdi);
- cpus_found = 0;
- last_domain = -1;
- sal_ptcdi--;
- for (cnode=0; cnode<num_nodes; cnode++) {
- nasid = GetNasid(cnode);
- for(cpu=0; cpu<CPUS_PER_NODE; cpu++) {
- if (IsCpuPresent(cnode, cpu)) {
- domain = cnode*CPUS_PER_NODE + cpu/CPUS_PER_FSB;
- if (domain != last_domain) {
- sal_ptc->num_domains++;
- sal_ptcdi++;
- sal_ptcdi->proc_count = 0;
- sal_ptcdi->proc_list = __fwtab_pa(base_nasid, sal_ptclid);
- last_domain = domain;
- }
- sal_ptcdi->proc_count++;
- sal_ptclid->id = nasid;
- sal_ptclid->eid = cpu;
- sal_ptclid++;
- cpus_found++;
- }
- }
- }
- if (cpus_found != num_cpus)
- FPROM_BUG();
- /* Make the AP WAKEUP entry */
- sal_apwake->type = SAL_DESC_AP_WAKEUP;
- sal_apwake->mechanism = IA64_SAL_AP_EXTERNAL_INT;
- sal_apwake->vector = 18;
- for (cp = (char *) sal_systab; cp < (char *) efi_memmap; ++cp)
- checksum += *cp;
- sal_systab->checksum = -checksum;
- md = &efi_memmap[0];
- num_memmd = build_efi_memmap((void *)md, mdsize) ;
- bp = id(ZERO_PAGE_ADDR + (((long)base_nasid)<<33));
- bp->efi_systab = __fwtab_pa(base_nasid, &fw_mem);
- bp->efi_memmap = __fwtab_pa(base_nasid, efi_memmap);
- bp->efi_memmap_size = num_memmd*mdsize;
- bp->efi_memdesc_size = mdsize;
- bp->efi_memdesc_version = 0x101;
- bp->command_line = __fwtab_pa(base_nasid, cmd_line);
- bp->console_info.num_cols = 80;
- bp->console_info.num_rows = 25;
- bp->console_info.orig_x = 0;
- bp->console_info.orig_y = 24;
- bp->num_pci_vectors = 0;
- bp->fpswa = 0;
- /*
- * Now pick the BSP & store it LID value in
- * a global variable. Note if BSP is greater than last cpu,
- * pick the last cpu.
- */
- for (cnode=0; cnode<num_nodes; cnode++) {
- for(cpu=0; cpu<CPUS_PER_NODE; cpu++) {
- if (!IsCpuPresent(cnode, cpu))
- continue;
- bsp_lid = (GetNasid(cnode)<<24) | (cpu<<16);
- if (bsp-- > 0)
- continue;
- return;
- }
- }
- }