patch-2.3.43 linux/arch/ia64/kernel/fw-emu.c

• Lines: 445
• Date: Sun Feb 6 18:42:40 2000
• Orig file: v2.3.42/linux/arch/ia64/kernel/fw-emu.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.42/linux/arch/ia64/kernel/fw-emu.c linux/arch/ia64/kernel/fw-emu.c
@@ -0,0 +1,444 @@
+/*
+ * PAL & SAL emulation.
+ *
+ * Copyright (C) 1998-2000 Hewlett-Packard Co
+ * Copyright (C) 1998-2000 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 <asm/efi.h>
+#include <asm/io.h>
+#include <asm/pal.h>
+#include <asm/sal.h>
+
+#define MB	(1024*1024UL)
+
+#define NUM_MEM_DESCS	3
+
+static char fw_mem[(  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=%1\n\t"
+		      "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_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=0x100000000		/* 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=0x100000064		/* itc_ratio<<32 (1/100) */
+1:	br.cond.sptk.few rp
+	.endp pal_emulator_static\n");
+
+/* 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 = 100000000;
+			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...
+			 */
+#if defined(CONFIG_IA64_SOFTSDV_HACKS)
+			r9 =   4000000;
+#elif defined(CONFIG_IA64_SDV)
+			r9 = 300000000;
+#else
+			r9 = 700000000;
+#endif
+			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;
+}
+
+void
+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);
+	cmd_line    = (void *) cp;
+
+	if (args) {
+		if (arglen >= 1024)
+			arglen = 1023;
+		memcpy(cmd_line, args, arglen);
+	} else {
+		arglen = 0;
+	}
+	cmd_line[arglen] = '\0';
+
+	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\0e\0w\0l\0e\0t\0t\0-\0P\0a\0c\0k\0a\0r\0d\0\0");
+	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;
+	sal_systab->ia32_bios_present = 0;
+
+#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
+
+#ifdef CONFIG_IA64_SGI_SN1_SIM
+	strcpy(sal_systab->oem_id, "SGI");
+	strcpy(sal_systab->product_id, "SN1");
+#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;
+
+	/* fill in a memory descriptor: */
+	md = &efi_memmap[0];
+	md->type = EFI_CONVENTIONAL_MEMORY;
+	md->pad = 0;
+	md->phys_addr = 2*MB;
+	md->virt_addr = 0;
+	md->num_pages = (64*MB) >> 12;	/* 64MB (in 4KB pages) */
+	md->attribute = EFI_MEMORY_WB;
+
+	/* descriptor for firmware emulator: */
+	md = &efi_memmap[1];
+	md->type = EFI_RUNTIME_SERVICES_DATA;
+	md->pad = 0;
+	md->phys_addr = 1*MB;
+	md->virt_addr = 0;
+	md->num_pages = (1*MB) >> 12;	/* 1MB (in 4KB pages) */
+	md->attribute = EFI_MEMORY_WB;
+
+	/* descriptor for high memory (>4GB): */
+	md = &efi_memmap[2];
+	md->type = EFI_CONVENTIONAL_MEMORY;
+	md->pad = 0;
+	md->phys_addr = 4096*MB;
+	md->virt_addr = 0;
+	md->num_pages = (32*MB) >> 12;	/* 32MB (in 4KB pages) */
+	md->attribute = EFI_MEMORY_WB;
+
+	bp = id(ZERO_PAGE_ADDR);
+	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->num_pci_vectors = 0;
+	bp->fpswa = 0;
+}