fw-emu.c
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上传日期:2013-04-10
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文件大小:14k
- /*
- * PAL & SAL emulation.
- *
- * Copyright (C) 1998-2001 Hewlett-Packard Co
- * Copyright (C) 1998-2001 David Mosberger-Tang <davidm@hpl.hp.com>
- *
- * For the HP simulator, this file gets include in boot/bootloader.c.
- * For SoftSDV, this file gets included in sys_softsdv.c.
- */
- #include <linux/config.h>
- #ifdef CONFIG_PCI
- # include <linux/pci.h>
- #endif
- #include <linux/efi.h>
- #include <asm/io.h>
- #include <asm/pal.h>
- #include <asm/sal.h>
- #define MB (1024*1024UL)
- #define GB (1024*MB)
- #define TB (1024*GB)
- #define NUM_MEM_DESCS 4
- static char fw_mem[( sizeof(struct ia64_boot_param)
- + sizeof(efi_system_table_t)
- + sizeof(efi_runtime_services_t)
- + 1*sizeof(efi_config_table_t)
- + sizeof(struct ia64_sal_systab)
- + sizeof(struct ia64_sal_desc_entry_point)
- + NUM_MEM_DESCS*(sizeof(efi_memory_desc_t))
- + 1024)] __attribute__ ((aligned (8)));
- #ifdef CONFIG_IA64_HP_SIM
- /* Simulator system calls: */
- #define SSC_EXIT 66
- /*
- * Simulator system call.
- */
- static long
- ssc (long arg0, long arg1, long arg2, long arg3, int nr)
- {
- register long r8 asm ("r8");
- asm volatile ("mov r15=%1nt"
- "break 0x80001"
- : "=r"(r8)
- : "r"(nr), "r"(arg0), "r"(arg1), "r"(arg2), "r"(arg3));
- return r8;
- }
- #define SECS_PER_HOUR (60 * 60)
- #define SECS_PER_DAY (SECS_PER_HOUR * 24)
- /* Compute the `struct tm' representation of *T,
- offset OFFSET seconds east of UTC,
- and store year, yday, mon, mday, wday, hour, min, sec into *TP.
- Return nonzero if successful. */
- int
- offtime (unsigned long t, efi_time_t *tp)
- {
- const unsigned short int __mon_yday[2][13] =
- {
- /* Normal years. */
- { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
- /* Leap years. */
- { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
- };
- long int days, rem, y;
- const unsigned short int *ip;
- days = t / SECS_PER_DAY;
- rem = t % SECS_PER_DAY;
- while (rem < 0) {
- rem += SECS_PER_DAY;
- --days;
- }
- while (rem >= SECS_PER_DAY) {
- rem -= SECS_PER_DAY;
- ++days;
- }
- tp->hour = rem / SECS_PER_HOUR;
- rem %= SECS_PER_HOUR;
- tp->minute = rem / 60;
- tp->second = rem % 60;
- /* January 1, 1970 was a Thursday. */
- y = 1970;
- # define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
- # define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
- # define __isleap(year)
- ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
- while (days < 0 || days >= (__isleap (y) ? 366 : 365)) {
- /* Guess a corrected year, assuming 365 days per year. */
- long int yg = y + days / 365 - (days % 365 < 0);
- /* Adjust DAYS and Y to match the guessed year. */
- days -= ((yg - y) * 365 + LEAPS_THRU_END_OF (yg - 1)
- - LEAPS_THRU_END_OF (y - 1));
- y = yg;
- }
- tp->year = y;
- ip = __mon_yday[__isleap(y)];
- for (y = 11; days < (long int) ip[y]; --y)
- continue;
- days -= ip[y];
- tp->month = y + 1;
- tp->day = days + 1;
- return 1;
- }
- #endif /* CONFIG_IA64_HP_SIM */
- /*
- * 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 (
- " .proc pal_emulator_staticn"
- "pal_emulator_static:"
- " mov r8=-1n"
- " mov r9=256n"
- " ;;n"
- " cmp.gtu p6,p7=r9,r28 /* r28 <= 255? */n"
- "(p6) br.cond.sptk.few staticn"
- " ;;n"
- " mov r9=512n"
- " ;;n"
- " cmp.gtu p6,p7=r9,r28n"
- "(p6) br.cond.sptk.few stackedn"
- " ;;n"
- "static: cmp.eq p6,p7=6,r28 /* PAL_PTCE_INFO */n"
- "(p7) br.cond.sptk.few 1fn"
- " ;;n"
- " mov r8=0 /* status = 0 */n"
- " movl r9=0x100000000 /* tc.base */n"
- " movl r10=0x0000000200000003 /* count[0], count[1] */n"
- " movl r11=0x1000000000002000 /* stride[0], stride[1] */n"
- " br.cond.sptk.few rpn"
- "1: cmp.eq p6,p7=14,r28 /* PAL_FREQ_RATIOS */n"
- "(p7) br.cond.sptk.few 1fn"
- " mov r8=0 /* status = 0 */n"
- " movl r9 =0x100000064 /* proc_ratio (1/100) */n"
- " movl r10=0x100000100 /* bus_ratio<<32 (1/256) */n"
- " movl r11=0x100000064 /* itc_ratio<<32 (1/100) */n"
- " ;;n"
- "1: cmp.eq p6,p7=19,r28 /* PAL_RSE_INFO */n"
- "(p7) br.cond.sptk.few 1fn"
- " mov r8=0 /* status = 0 */n"
- " mov r9=96 /* num phys stacked */n"
- " mov r10=0 /* hints */n"
- " mov r11=0n"
- " br.cond.sptk.few rpn"
- "1: cmp.eq p6,p7=1,r28 /* PAL_CACHE_FLUSH */n"
- "(p7) br.cond.sptk.few 1fn"
- " mov r9=ar.lcn"
- " movl r8=524288 /* flush 512k million cache lines (16MB) */n"
- " ;;n"
- " mov ar.lc=r8n"
- " movl r8=0xe000000000000000n"
- " ;;n"
- ".loop: fc r8n"
- " add r8=32,r8n"
- " br.cloop.sptk.few .loopn"
- " sync.in"
- " ;;n"
- " srlz.in"
- " ;;n"
- " mov ar.lc=r9n"
- " mov r8=r0n"
- " ;;n"
- "1: cmp.eq p6,p7=15,r28 /* PAL_PERF_MON_INFO */n"
- "(p7) br.cond.sptk.few 1fn"
- " mov r8=0 /* status = 0 */n"
- " movl r9 =0x12082004 /* generic=4 width=32 retired=8 cycles=18 */n"
- " mov r10=0 /* reserved */n"
- " mov r11=0 /* reserved */n"
- " mov r16=0xffff /* implemented PMC */n"
- " mov r17=0xffff /* implemented PMD */n"
- " add r18=8,r29 /* second index */n"
- " ;;n"
- " st8 [r29]=r16,16 /* store implemented PMC */n"
- " st8 [r18]=r0,16 /* clear remaining bits */n"
- " ;;n"
- " st8 [r29]=r0,16 /* store implemented PMC */n"
- " st8 [r18]=r0,16 /* clear remaining bits */n"
- " ;;n"
- " st8 [r29]=r17,16 /* store implemented PMD */n"
- " st8 [r18]=r0,16 /* clear remaining bits */n"
- " mov r16=0xf0 /* cycles count capable PMC */n"
- " ;;n"
- " st8 [r29]=r0,16 /* store implemented PMC */n"
- " st8 [r18]=r0,16 /* clear remaining bits */n"
- " mov r17=0x10 /* retired bundles capable PMC */n"
- " ;;n"
- " st8 [r29]=r16,16 /* store cycles capable */n"
- " st8 [r18]=r0,16 /* clear remaining bits */n"
- " ;;n"
- " st8 [r29]=r0,16 /* store implemented PMC */n"
- " st8 [r18]=r0,16 /* clear remaining bits */n"
- " ;;n"
- " st8 [r29]=r17,16 /* store retired bundle capable */n"
- " st8 [r18]=r0,16 /* clear remaining bits */n"
- " ;;n"
- " st8 [r29]=r0,16 /* store implemented PMC */n"
- " st8 [r18]=r0,16 /* clear remaining bits */n"
- " ;;n"
- "1: br.cond.sptk.few rpn"
- "stacked:n"
- " br.ret.sptk.few rpn"
- " .endp pal_emulator_staticn");
- /* Macro to emulate SAL call using legacy IN and OUT calls to CF8, CFC etc.. */
- #define BUILD_CMD(addr) ((0x80000000 | (addr)) & ~3)
- #define REG_OFFSET(addr) (0x00000000000000FF & (addr))
- #define DEVICE_FUNCTION(addr) (0x000000000000FF00 & (addr))
- #define BUS_NUMBER(addr) (0x0000000000FF0000 & (addr))
- static efi_status_t
- efi_get_time (efi_time_t *tm, efi_time_cap_t *tc)
- {
- #ifdef CONFIG_IA64_HP_SIM
- struct {
- int tv_sec; /* must be 32bits to work */
- int tv_usec;
- } tv32bits;
- ssc((unsigned long) &tv32bits, 0, 0, 0, SSC_GET_TOD);
- memset(tm, 0, sizeof(*tm));
- offtime(tv32bits.tv_sec, tm);
- if (tc)
- memset(tc, 0, sizeof(*tc));
- #else
- # error Not implemented yet...
- #endif
- return EFI_SUCCESS;
- }
- static void
- efi_reset_system (int reset_type, efi_status_t status, unsigned long data_size, efi_char16_t *data)
- {
- #ifdef CONFIG_IA64_HP_SIM
- ssc(status, 0, 0, 0, SSC_EXIT);
- #else
- # error Not implemented yet...
- #endif
- }
- 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 = 200000000;
- 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) {
- ;
- } 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) {
- ;
- #ifdef CONFIG_PCI
- } else if (index == SAL_PCI_CONFIG_READ) {
- /*
- * in1 contains the PCI configuration address and in2
- * the size of the read. The value that is read is
- * returned via the general register r9.
- */
- outl(BUILD_CMD(in1), 0xCF8);
- if (in2 == 1) /* Reading byte */
- r9 = inb(0xCFC + ((REG_OFFSET(in1) & 3)));
- else if (in2 == 2) /* Reading word */
- r9 = inw(0xCFC + ((REG_OFFSET(in1) & 2)));
- else /* Reading dword */
- r9 = inl(0xCFC);
- status = PCIBIOS_SUCCESSFUL;
- } else if (index == SAL_PCI_CONFIG_WRITE) {
- /*
- * in1 contains the PCI configuration address, in2 the
- * size of the write, and in3 the actual value to be
- * written out.
- */
- outl(BUILD_CMD(in1), 0xCF8);
- if (in2 == 1) /* Writing byte */
- outb(in3, 0xCFC + ((REG_OFFSET(in1) & 3)));
- else if (in2 == 2) /* Writing word */
- outw(in3, 0xCFC + ((REG_OFFSET(in1) & 2)));
- else /* Writing dword */
- outl(in3, 0xCFC);
- status = PCIBIOS_SUCCESSFUL;
- #endif /* CONFIG_PCI */
- } 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;
- }
- struct ia64_boot_param *
- sys_fw_init (const char *args, int arglen)
- {
- efi_system_table_t *efi_systab;
- efi_runtime_services_t *efi_runtime;
- efi_config_table_t *efi_tables;
- struct ia64_sal_systab *sal_systab;
- efi_memory_desc_t *efi_memmap, *md;
- unsigned long *pal_desc, *sal_desc;
- struct ia64_sal_desc_entry_point *sal_ed;
- struct ia64_boot_param *bp;
- unsigned char checksum = 0;
- char *cp, *cmd_line;
- memset(fw_mem, 0, sizeof(fw_mem));
- pal_desc = (unsigned long *) &pal_emulator_static;
- sal_desc = (unsigned long *) &sal_emulator;
- cp = fw_mem;
- efi_systab = (void *) cp; cp += sizeof(*efi_systab);
- efi_runtime = (void *) cp; cp += sizeof(*efi_runtime);
- efi_tables = (void *) cp; cp += sizeof(*efi_tables);
- sal_systab = (void *) cp; cp += sizeof(*sal_systab);
- sal_ed = (void *) cp; cp += sizeof(*sal_ed);
- efi_memmap = (void *) cp; cp += NUM_MEM_DESCS*sizeof(*efi_memmap);
- bp = (void *) cp; cp += sizeof(*bp);
- cmd_line = (void *) cp;
- if (args) {
- if (arglen >= 1024)
- arglen = 1023;
- memcpy(cmd_line, args, arglen);
- } else {
- arglen = 0;
- }
- cmd_line[arglen] = ' ';
- 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 = __pa("H e w l e t t - P a c k a r d ");
- efi_systab->fw_revision = 1;
- efi_systab->runtime = __pa(efi_runtime);
- efi_systab->nr_tables = 1;
- efi_systab->tables = __pa(efi_tables);
- 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 = __pa(&efi_get_time);
- efi_runtime->set_time = __pa(&efi_unimplemented);
- efi_runtime->get_wakeup_time = __pa(&efi_unimplemented);
- efi_runtime->set_wakeup_time = __pa(&efi_unimplemented);
- efi_runtime->set_virtual_address_map = __pa(&efi_unimplemented);
- efi_runtime->get_variable = __pa(&efi_unimplemented);
- efi_runtime->get_next_variable = __pa(&efi_unimplemented);
- efi_runtime->set_variable = __pa(&efi_unimplemented);
- efi_runtime->get_next_high_mono_count = __pa(&efi_unimplemented);
- efi_runtime->reset_system = __pa(&efi_reset_system);
- efi_tables->guid = SAL_SYSTEM_TABLE_GUID;
- efi_tables->table = __pa(sal_systab);
- /* 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 = 1;
- #ifdef CONFIG_IA64_GENERIC
- strcpy(sal_systab->oem_id, "Generic");
- strcpy(sal_systab->product_id, "IA-64 system");
- #endif
- #ifdef CONFIG_IA64_HP_SIM
- strcpy(sal_systab->oem_id, "Hewlett-Packard");
- strcpy(sal_systab->product_id, "HP-simulator");
- #endif
- #ifdef CONFIG_IA64_SDV
- strcpy(sal_systab->oem_id, "Intel");
- strcpy(sal_systab->product_id, "SDV");
- #endif
- /* fill in an entry point: */
- sal_ed->type = SAL_DESC_ENTRY_POINT;
- sal_ed->pal_proc = __pa(pal_desc[0]);
- sal_ed->sal_proc = __pa(sal_desc[0]);
- sal_ed->gp = __pa(sal_desc[1]);
- for (cp = (char *) sal_systab; cp < (char *) efi_memmap; ++cp)
- checksum += *cp;
- sal_systab->checksum = -checksum;
- /* simulate free memory at physical address zero */
- md = &efi_memmap[0];
- md->type = EFI_BOOT_SERVICES_DATA;
- md->pad = 0;
- md->phys_addr = 0*MB;
- md->virt_addr = 0;
- md->num_pages = (1*MB) >> 12; /* 1MB (in 4KB pages) */
- md->attribute = EFI_MEMORY_WB | EFI_MEMORY_WC | EFI_MEMORY_UC;
- /* fill in a memory descriptor: */
- md = &efi_memmap[1];
- md->type = EFI_CONVENTIONAL_MEMORY;
- md->pad = 0;
- md->phys_addr = 2*MB;
- md->virt_addr = 0;
- md->num_pages = (128*MB) >> 12; /* 128MB (in 4KB pages) */
- md->attribute = EFI_MEMORY_WB;
- /* descriptor for firmware emulator: */
- md = &efi_memmap[2];
- md->type = EFI_PAL_CODE;
- md->pad = 0;
- md->phys_addr = 1*MB;
- md->virt_addr = 1*MB;
- md->num_pages = (1*MB) >> 12; /* 1MB (in 4KB pages) */
- md->attribute = EFI_MEMORY_WB | EFI_MEMORY_WC | EFI_MEMORY_UC;
- /* descriptor for high memory (>4TB): */
- md = &efi_memmap[3];
- md->type = EFI_CONVENTIONAL_MEMORY;
- md->pad = 0;
- md->phys_addr = 4*TB;
- md->virt_addr = 0;
- md->num_pages = (64*MB) >> 12; /* 64MB (in 4KB pages) */
- md->attribute = EFI_MEMORY_WB;
- bp->efi_systab = __pa(&fw_mem);
- bp->efi_memmap = __pa(efi_memmap);
- bp->efi_memmap_size = NUM_MEM_DESCS*sizeof(efi_memory_desc_t);
- bp->efi_memdesc_size = sizeof(efi_memory_desc_t);
- bp->efi_memdesc_version = 1;
- bp->command_line = __pa(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->fpswa = 0;
- return bp;
- }