patch-2.4.19 linux-2.4.19/arch/ia64/sn/sn1/setup.c

• Lines: 255
• Date: Wed Dec 31 16:00:00 1969
• Orig file: linux-2.4.18/arch/ia64/sn/sn1/setup.c
• Orig date: Thu Apr 5 12:51:47 2001

diff -urN linux-2.4.18/arch/ia64/sn/sn1/setup.c linux-2.4.19/arch/ia64/sn/sn1/setup.c
@@ -1,254 +0,0 @@
-/*
- *
- * Copyright (C) 1999 Silicon Graphics, Inc.
- * Copyright (C) Vijay Chander(vijay@engr.sgi.com)
- */
-#include <linux/config.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/kernel.h>
-#include <linux/kdev_t.h>
-#include <linux/string.h>
-#include <linux/tty.h>
-#include <linux/console.h>
-#include <linux/timex.h>
-#include <linux/sched.h>
-#include <linux/ioport.h>
-#include <linux/mm.h>
-#include <linux/serial.h>
-
-#include <asm/sn/mmzone_sn1.h>
-#include <asm/io.h>
-#include <asm/dma.h>
-#include <asm/machvec.h>
-#include <asm/system.h>
-#include <asm/processor.h>
-#include <asm-ia64/sn/arch.h>
-#include <asm-ia64/sn/addrs.h>
-
-
-/*
- * This is the address of the RRegs in the HSpace of the global
- * master.  It is used by a hack in serial.c (serial_[in|out],
- * printk.c (early_printk), and kdb_io.c to put console output on that
- * node's Bedrock UART.  It is initialized here to 0, so that
- * early_printk won't try to access the UART before
- * master_node_bedrock_address is properly calculated.
- */
-u64 master_node_bedrock_address = 0UL;
-
-static void sn_fix_ivt_for_partitioned_system(void);
-
-
-/*
- * The format of "screen_info" is strange, and due to early i386-setup
- * code. This is just enough to make the console code think we're on a
- * VGA color display.
- */
-struct screen_info sn1_screen_info = {
-	orig_x:			 0,
-	orig_y:			 0,
-	orig_video_mode:	 3,
-	orig_video_cols:	80,
-	orig_video_ega_bx:	 3,
-	orig_video_lines:	25,
-	orig_video_isVGA:	 1,
-	orig_video_points:	16
-};
-
-/*
- * This is here so we can use the CMOS detection in ide-probe.c to
- * determine what drives are present.  In theory, we don't need this
- * as the auto-detection could be done via ide-probe.c:do_probe() but
- * in practice that would be much slower, which is painful when
- * running in the simulator.  Note that passing zeroes in DRIVE_INFO
- * is sufficient (the IDE driver will autodetect the drive geometry).
- */
-char drive_info[4*16];
-
-unsigned long
-sn1_map_nr (unsigned long addr)
-{
-#ifdef CONFIG_DISCONTIGMEM
-	return MAP_NR_SN1(addr);
-#else
-	return MAP_NR_DENSE(addr);
-#endif
-}
-
-#if defined(BRINGUP) && defined(CONFIG_IA64_EARLY_PRINTK)
-void __init
-early_sn1_setup(void)
-{
-	master_node_bedrock_address = 
-		(u64)REMOTE_HSPEC_ADDR(get_nasid(), 0);
-	printk("early_sn1_setup: setting master_node_bedrock_address to 0x%lx\n", master_node_bedrock_address);
-}
-#endif /* BRINGUP && CONFIG_IA64_EARLY_PRINTK */
-
-void __init
-sn1_setup(char **cmdline_p)
-{
-#if defined(CONFIG_SERIAL) && !defined(CONFIG_SERIAL_SGI_L1_PROTOCOL)
-	struct serial_struct req;
-#endif
-
-	MAX_DMA_ADDRESS = PAGE_OFFSET + 0x10000000000UL;
-	master_node_bedrock_address = 
-		(u64)REMOTE_HSPEC_ADDR(get_nasid(), 0);
-	printk("sn1_setup: setting master_node_bedrock_address to 0x%lx\n",
-		   master_node_bedrock_address);
-
-#if defined(CONFIG_SERIAL) && !defined(CONFIG_SERIAL_SGI_L1_PROTOCOL)
-	/*
-	 * We do early_serial_setup() to clean out the rs-table[] from the
-	 * statically compiled in version.
-	 */
-	memset(&req, 0, sizeof(struct serial_struct));
-	req.line = 0;
-	req.baud_base = 124800;
-	req.port = 0;
-	req.port_high = 0;
-	req.irq = 0;
-	req.flags = (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST);
-	req.io_type = SERIAL_IO_MEM;
-	req.hub6 = 0;
-	req.iomem_base = (u8 *)(master_node_bedrock_address + 0x80);
-	req.iomem_reg_shift = 3;
-	req.type = 0;
-	req.xmit_fifo_size = 0;
-	req.custom_divisor = 0;
-	req.closing_wait = 0;
-	early_serial_setup(&req);
-#endif /* CONFIG_SERIAL && !CONFIG_SERIAL_SGI_L1_PROTOCOL */
-
-	ROOT_DEV = to_kdev_t(0x0301);		/* default to first IDE drive */
-	sn_fix_ivt_for_partitioned_system();
-
-#ifdef CONFIG_SMP
-	init_smp_config();
-#endif
-	screen_info = sn1_screen_info;
-}
-
-
-/* 
- * sn_fix_ivt_for_partitioned_system
- *
- * This is an ugly hack that is needed for partitioned systems.
- *
- * On a partitioned system, most partitions do NOT have a physical address 0.
- * Unfortunately, the exception handling code in ivt.S has a couple of physical
- * addresses of kernel structures hardcoded into "movl" instructions.
- * These addresses are correct on partition 0 only. On all other partitions,
- * the addresses must be changed to reference the correct address.
- *
- * This routine scans the ivt code and replaces the hardcoded addresses with 
- * the correct address.
- *
- * Note that we could have made the ivt.S code dynamically determine the correct
- * address but this would add code to performance critical pathes. This option
- * was rejected.
- */
-
-#define TEMP_mlx	4		/* template type that contains movl instruction */
-#define TEMP_mlX	5		/* template type that contains movl instruction */
-
-typedef union {				/* Instruction encoding for movl instruction */
-	struct {
-		unsigned long	qp:6;
-		unsigned long	r1:7;
-		unsigned long	imm7b:7;
-		unsigned long	vc:1;
-		unsigned long	ic:1;
-		unsigned long	imm5c:5;
-		unsigned long	imm9d:9;
-		unsigned long	i:1;
-		unsigned long	op:4;
-		unsigned long	fill:23;
-	} b;
-	unsigned long	l;
-} movl_instruction_t;
-
-#define MOVL_OPCODE	6
-#define MOVL_ARG(a,b)	(((long)a.i<<63) | ((long)b<<22) | ((long)a.ic<<21) | \
-			((long)a.imm5c<<16) | ((long)a.imm9d<<7) | ((long)a.imm7b))
-
-typedef struct {				/* Instruction bundle */
-	unsigned long template:5;
-	unsigned long ins2:41;
-	unsigned long ins1l:18;
-	unsigned long ins1u:23;
-	unsigned long ins0:41;
-} instruction_bundle_t;
-
-
-static void __init
-sn_fix_ivt_for_partitioned_system(void)
-{
-	extern int		ia64_ivt;
-	instruction_bundle_t	*p, *pend;
-	movl_instruction_t	ins0, ins1, ins2;
-	long			new_ins1, phys_offset;
-	unsigned long		val;
-
-	/*
-	 * Setup to scan the ivt code.
-	 */
-	p = (instruction_bundle_t*)&ia64_ivt;
-	pend = p + 0x8000/sizeof(instruction_bundle_t);
-	phys_offset = __pa(p) & ~0x1ffffffffUL;
-
-	/*
-	 * Hunt for movl instructions that contain the node 0 physical address 
-	 * of "SWAPPER_PGD_ADDR".  These addresses must be relocated to reference the 
-	 * actual node that the kernel is loaded on.
-	 */
-	for (; p < pend; p++) {
-		if (p->template != TEMP_mlx && p->template != TEMP_mlX)
-			continue;
-		ins0.l =  p->ins0;
-		if (ins0.b.op != MOVL_OPCODE)
-			continue;
-		ins1.l =  ((long)p->ins1u<<18) | p->ins1l;
-		ins2.l =  p->ins2;
-		val = MOVL_ARG(ins0.b, ins1.l);
-
-		/*
-		 * Test for correct address. SWAPPER_PGD_ADDR will
-		 * always be a node 0 virtual address. Note that we cant
-		 * use the __pa or __va macros here since they may contain
-		 * debug code that gets fooled here.
-		 */
-		if ((PAGE_OFFSET | val)  != SWAPPER_PGD_ADDR)
-			continue;
-
-		/*
-		 * We found an instruction that needs to be fixed. The following
-		 * inserts the NASID of the ivt into the movl instruction.
-		 */
-		new_ins1 = ins1.l | (phys_offset>>22);
-		p->ins1l = new_ins1 & 0x3ffff;
-		p->ins1u = (new_ins1>>18) & 0x7fffff;
-		ia64_fc(p);
-	}
-
-	/*
-	 * Do necessary serialization.
-	 */
-	ia64_sync_i();
-	ia64_srlz_i();
-
-}
-
-int
-IS_RUNNING_ON_SIMULATOR(void)
-{
-#ifdef CONFIG_IA64_SGI_SN1_SIM
-	long sn;
-	asm("mov %0=cpuid[%1]" : "=r"(sn) : "r"(2));
-	return(sn == SNMAGIC);
-#else
-	return(0);
-#endif
-}