patch-2.1.116 linux/arch/alpha/kernel/core_mcpcia.c

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diff -u --recursive --new-file v2.1.115/linux/arch/alpha/kernel/core_mcpcia.c linux/arch/alpha/kernel/core_mcpcia.c
@@ -0,0 +1,970 @@
+/*
+ *	linux/arch/alpha/kernel/core_mcpcia.c
+ *
+ * Code common to all MCbus-PCI Adaptor core logic chipsets
+ *
+ * Based on code written by David A Rusling (david.rusling@reo.mts.dec.com).
+ *
+ */
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+
+#include <asm/ptrace.h>
+#include <asm/system.h>
+#include <asm/pci.h>
+
+#define __EXTERN_INLINE inline
+#include <asm/io.h>
+#include <asm/core_mcpcia.h>
+#undef __EXTERN_INLINE
+
+#include "proto.h"
+
+/*
+ * NOTE: Herein lie back-to-back mb instructions.  They are magic. 
+ * One plausible explanation is that the i/o controller does not properly
+ * handle the system transaction.  Another involves timing.  Ho hum.
+ */
+
+extern asmlinkage void wrmces(unsigned long mces);
+
+/*
+ * BIOS32-style PCI interface:
+ */
+
+#undef DEBUG_CFG
+
+#ifdef DEBUG_CFG
+# define DBG_CFG(args)	printk args
+#else
+# define DBG_CFG(args)
+#endif
+
+#undef DEBUG_PCI
+
+#ifdef DEBUG_PCI
+# define DBG_PCI(args)	printk args
+#else
+# define DBG_PCI(args)
+#endif
+
+#define DEBUG_MCHECK
+
+#ifdef DEBUG_MCHECK
+# define DBG_MCK(args)	printk args
+# define DEBUG_MCHECK_DUMP
+#else
+# define DBG_MCK(args)
+#endif
+
+#define vuip	volatile unsigned int  *
+#define vulp	volatile unsigned long  *
+
+static volatile unsigned int MCPCIA_mcheck_expected[NR_CPUS];
+static volatile unsigned int MCPCIA_mcheck_taken[NR_CPUS];
+static unsigned int MCPCIA_jd[NR_CPUS];
+
+#define MCPCIA_MAX_HOSES 2
+static int mcpcia_num_hoses = 0;
+
+static int pci_probe_enabled = 0; /* disable to start */
+
+static struct linux_hose_info *mcpcia_root = NULL, *mcpcia_last_hose;
+
+static inline unsigned long long_align(unsigned long addr)
+{
+	return ((addr + (sizeof(unsigned long) - 1)) &
+		~(sizeof(unsigned long) - 1));
+}
+
+
+/*
+ * Given a bus, device, and function number, compute resulting
+ * configuration space address and setup the MCPCIA_HAXR2 register
+ * accordingly.  It is therefore not safe to have concurrent
+ * invocations to configuration space access routines, but there
+ * really shouldn't be any need for this.
+ *
+ * Type 0:
+ *
+ *  3 3|3 3 2 2|2 2 2 2|2 2 2 2|1 1 1 1|1 1 1 1|1 1 
+ *  3 2|1 0 9 8|7 6 5 4|3 2 1 0|9 8 7 6|5 4 3 2|1 0 9 8|7 6 5 4|3 2 1 0
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | | |D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|F|F|F|R|R|R|R|R|R|0|0|
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *
+ *	31:11	Device select bit.
+ * 	10:8	Function number
+ * 	 7:2	Register number
+ *
+ * Type 1:
+ *
+ *  3 3|3 3 2 2|2 2 2 2|2 2 2 2|1 1 1 1|1 1 1 1|1 1 
+ *  3 2|1 0 9 8|7 6 5 4|3 2 1 0|9 8 7 6|5 4 3 2|1 0 9 8|7 6 5 4|3 2 1 0
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | | | | | | | | | | |B|B|B|B|B|B|B|B|D|D|D|D|D|F|F|F|R|R|R|R|R|R|0|1|
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *
+ *	31:24	reserved
+ *	23:16	bus number (8 bits = 128 possible buses)
+ *	15:11	Device number (5 bits)
+ *	10:8	function number
+ *	 7:2	register number
+ *  
+ * Notes:
+ *	The function number selects which function of a multi-function device 
+ *	(e.g., SCSI and Ethernet).
+ * 
+ *	The register selects a DWORD (32 bit) register offset.  Hence it
+ *	doesn't get shifted by 2 bits as we want to "drop" the bottom two
+ *	bits.
+ */
+
+static unsigned int
+conf_read(unsigned long addr, unsigned char type1,
+	  struct linux_hose_info *hose)
+{
+	unsigned long flags;
+	unsigned long hoseno = hose->pci_hose_index;
+	unsigned int stat0, value, temp, cpu;
+
+	cpu = smp_processor_id();
+
+	save_and_cli(flags);
+
+	DBG_CFG(("conf_read(addr=0x%lx, type1=%d, hose=%d)\n",
+		 addr, type1, hoseno));
+
+	/* Reset status register to avoid losing errors.  */
+	stat0 = *(vuip)MCPCIA_CAP_ERR(hoseno);
+	*(vuip)MCPCIA_CAP_ERR(hoseno) = stat0; mb();
+	temp = *(vuip)MCPCIA_CAP_ERR(hoseno);
+	DBG_CFG(("conf_read: MCPCIA CAP_ERR(%d) was 0x%x\n", hoseno, stat0));
+
+	mb();
+	draina();
+	MCPCIA_mcheck_expected[cpu] = 1;
+	MCPCIA_mcheck_taken[cpu] = 0;
+	mb();
+
+	/* Access configuration space.  */
+	value = *((vuip)addr);
+	mb();
+	mb();  /* magic */
+
+	if (MCPCIA_mcheck_taken[cpu]) {
+		MCPCIA_mcheck_taken[cpu] = 0;
+		value = 0xffffffffU;
+		mb();
+	}
+	MCPCIA_mcheck_expected[cpu] = 0;
+	mb();
+
+	DBG_CFG(("conf_read(): finished\n"));
+
+	restore_flags(flags);
+	return value;
+}
+
+static void
+conf_write(unsigned long addr, unsigned int value, unsigned char type1,
+	   struct linux_hose_info *hose)
+{
+	unsigned long flags;
+	unsigned long hoseno = hose->pci_hose_index;
+	unsigned int stat0, temp, cpu;
+
+	cpu = smp_processor_id();
+
+	save_and_cli(flags);	/* avoid getting hit by machine check */
+
+	/* Reset status register to avoid losing errors.  */
+	stat0 = *(vuip)MCPCIA_CAP_ERR(hoseno);
+	*(vuip)MCPCIA_CAP_ERR(hoseno) = stat0; mb();
+	temp = *(vuip)MCPCIA_CAP_ERR(hoseno);
+	DBG_CFG(("conf_write: MCPCIA CAP_ERR(%d) was 0x%x\n", hoseno, stat0));
+
+	draina();
+	MCPCIA_mcheck_expected[cpu] = 1;
+	mb();
+
+	/* Access configuration space.  */
+	*((vuip)addr) = value;
+	mb();
+	mb();  /* magic */
+	temp = *(vuip)MCPCIA_CAP_ERR(hoseno); /* read to force the write */
+	MCPCIA_mcheck_expected[cpu] = 0;
+	mb();
+
+	DBG_CFG(("conf_write(): finished\n"));
+	restore_flags(flags);
+}
+
+static int
+mk_conf_addr(struct linux_hose_info *hose,
+	     u8 bus, u8 device_fn, u8 where,
+	     unsigned long *pci_addr, unsigned char *type1)
+{
+	unsigned long addr;
+
+	if (!pci_probe_enabled) /* if doing standard pci_init(), ignore */
+		return -1;
+
+	DBG_CFG(("mk_conf_addr(bus=%d ,device_fn=0x%x, where=0x%x,"
+		 " pci_addr=0x%p, type1=0x%p)\n",
+		 bus, device_fn, where, pci_addr, type1));
+
+	/* Type 1 configuration cycle for *ALL* busses.  */
+	*type1 = 1;
+
+	if (hose->pci_first_busno == bus)
+		bus = 0;
+	addr = (bus << 16) | (device_fn << 8) | (where);
+	addr <<= 5; /* swizzle for SPARSE */
+	addr |= hose->pci_config_space;
+
+	*pci_addr = addr;
+	DBG_CFG(("mk_conf_addr: returning pci_addr 0x%lx\n", addr));
+	return 0;
+}
+
+/* FIXME: At some point we should update these routines to use the new
+   PCI interface, which can jump through these hoops for us.  */
+
+static inline int
+hose_read_config_byte (u8 bus, u8 device_fn, u8 where, u8 *value,
+		       struct linux_hose_info *hose)
+{
+	unsigned long addr;
+	unsigned char type1;
+
+	*value = 0xff;
+
+	if (mk_conf_addr(hose, bus, device_fn, where, &addr, &type1))
+		return PCIBIOS_DEVICE_NOT_FOUND;
+
+	addr |= 0x00;
+	*value = conf_read(addr, type1, hose) >> ((where & 3) * 8);
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static inline int
+hose_read_config_word (u8 bus, u8 device_fn, u8 where, u16 *value,
+		       struct linux_hose_info *hose)
+{
+	unsigned long addr;
+	unsigned char type1;
+
+	*value = 0xffff;
+
+	if (where & 0x1)
+		return PCIBIOS_BAD_REGISTER_NUMBER;
+	if (mk_conf_addr(hose, bus, device_fn, where, &addr, &type1))
+		return PCIBIOS_DEVICE_NOT_FOUND;
+
+	addr |= 0x08;
+	*value = conf_read(addr, type1, hose) >> ((where & 3) * 8);
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static inline int
+hose_read_config_dword (u8 bus, u8 device_fn, u8 where, u32 *value,
+			struct linux_hose_info *hose)
+{
+	unsigned long addr;
+	unsigned char type1;
+
+	*value = 0xffffffff;
+
+	if (where & 0x3)
+		return PCIBIOS_BAD_REGISTER_NUMBER;
+	if (mk_conf_addr(hose, bus, device_fn, where, &addr, &type1))
+		return PCIBIOS_DEVICE_NOT_FOUND;
+
+	addr |= 0x18;
+	*value = conf_read(addr, type1, hose);
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static inline int
+hose_write_config_byte (u8 bus, u8 device_fn, u8 where, u8 value,
+			struct linux_hose_info *hose)
+{
+	unsigned long addr;
+	unsigned char type1;
+
+	if (mk_conf_addr(hose, bus, device_fn, where, &addr, &type1))
+		return PCIBIOS_DEVICE_NOT_FOUND;
+
+	addr |= 0x00;
+	conf_write(addr, value << ((where & 3) * 8), type1, hose);
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static inline int
+hose_write_config_word (u8 bus, u8 device_fn, u8 where, u16 value,
+			struct linux_hose_info *hose)
+{
+	unsigned long addr;
+	unsigned char type1;
+
+	if (mk_conf_addr(hose, bus, device_fn, where, &addr, &type1))
+		return PCIBIOS_DEVICE_NOT_FOUND;
+
+	addr |= 0x08;
+	conf_write(addr, value << ((where & 3) * 8), type1, hose);
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static inline int
+hose_write_config_dword (u8 bus, u8 device_fn, u8 where, u32 value,
+			 struct linux_hose_info *hose)
+{
+	unsigned long addr;
+	unsigned char type1;
+
+	if (mk_conf_addr(hose, bus, device_fn, where, &addr, &type1))
+		return PCIBIOS_DEVICE_NOT_FOUND;
+
+	addr |= 0x18;
+	conf_write(addr, value << ((where & 3) * 8), type1, hose);
+	return PCIBIOS_SUCCESSFUL;
+}
+
+int
+mcpcia_pcibios_read_config_byte (u8 bus, u8 devfn, u8 where, u8 *value)
+{
+	return hose_read_config_byte(bus, devfn, where, value, bus2hose[bus]);
+}
+
+int
+mcpcia_pcibios_read_config_word (u8 bus, u8 devfn, u8 where, u16 *value)
+{
+	return hose_read_config_word(bus, devfn, where, value, bus2hose[bus]);
+}
+
+int 
+mcpcia_pcibios_read_config_dword (u8 bus, u8 devfn, u8 where, u32 *value)
+{
+	return hose_read_config_dword(bus, devfn, where, value, bus2hose[bus]);
+}
+
+int 
+mcpcia_pcibios_write_config_byte (u8 bus, u8 devfn, u8 where, u8 value)
+{
+	return hose_write_config_byte(bus, devfn, where, value, bus2hose[bus]);
+}
+
+int 
+mcpcia_pcibios_write_config_word (u8 bus, u8 devfn, u8 where, u16 value)
+{
+	return hose_write_config_word(bus, devfn, where, value, bus2hose[bus]);
+}
+
+int 
+mcpcia_pcibios_write_config_dword (u8 bus, u8 devfn, u8 where, u32 val)
+{
+	return hose_write_config_dword(bus, devfn, where, val, bus2hose[bus]);
+}
+
+void __init
+mcpcia_init_arch(unsigned long *mem_start, unsigned long *mem_end)
+{
+	struct linux_hose_info *hose;
+	unsigned int mcpcia_err;
+	unsigned int pci_rev;
+	int h;
+
+	*mem_start = long_align(*mem_start);
+
+	for (h = 0; h < NR_CPUS; h++) {
+		MCPCIA_mcheck_expected[h] = 0;
+		MCPCIA_mcheck_taken[h] = 0;
+	}
+
+	/* First, find how many hoses we have.  */
+	for (h = 0; h < MCPCIA_MAX_HOSES; h++) {
+		pci_rev = *(vuip)MCPCIA_REV(h);
+#if 0
+		printk("mcpcia_init: got 0x%x for PCI_REV for hose %d\n",
+		       pci_rev, h);
+#endif
+		if ((pci_rev >> 16) == PCI_CLASS_BRIDGE_HOST) {
+			mcpcia_num_hoses++;
+
+			hose = (struct linux_hose_info *)*mem_start;
+			*mem_start = long_align(*mem_start + sizeof(*hose));
+
+			memset(hose, 0, sizeof(*hose));
+
+			if (mcpcia_root)
+				mcpcia_last_hose->next = hose;
+			else
+				mcpcia_root = hose;
+			mcpcia_last_hose = hose;
+
+			hose->pci_io_space = MCPCIA_IO(h);
+			hose->pci_mem_space = MCPCIA_DENSE(h);
+			hose->pci_config_space = MCPCIA_CONF(h);
+			hose->pci_sparse_space = MCPCIA_SPARSE(h);
+			hose->pci_hose_index = h;
+			hose->pci_first_busno = 255;
+			hose->pci_last_busno = 0;
+		}
+	}
+
+#if 1
+	printk("mcpcia_init: found %d hoses\n", mcpcia_num_hoses);
+#endif
+
+	/* Now do init for each hose.  */
+	for (hose = mcpcia_root; hose; hose = hose->next) {
+		h = hose->pci_hose_index;
+#if 0
+		printk("mcpcia_init: -------- hose %d --------\n",h);
+		printk("MCPCIA_REV 0x%x\n", *(vuip)MCPCIA_REV(h));
+		printk("MCPCIA_WHOAMI 0x%x\n", *(vuip)MCPCIA_WHOAMI(h));
+		printk("MCPCIA_HAE_MEM 0x%x\n", *(vuip)MCPCIA_HAE_MEM(h));
+		printk("MCPCIA_HAE_IO 0x%x\n", *(vuip)MCPCIA_HAE_IO(h));
+		printk("MCPCIA_HAE_DENSE 0x%x\n", *(vuip)MCPCIA_HAE_DENSE(h));
+		printk("MCPCIA_INT_CTL 0x%x\n", *(vuip)MCPCIA_INT_CTL(h));
+		printk("MCPCIA_INT_REQ 0x%x\n", *(vuip)MCPCIA_INT_REQ(h));
+		printk("MCPCIA_INT_TARG 0x%x\n", *(vuip)MCPCIA_INT_TARG(h));
+		printk("MCPCIA_INT_ADR 0x%x\n", *(vuip)MCPCIA_INT_ADR(h));
+		printk("MCPCIA_INT_ADR_EXT 0x%x\n", *(vuip)MCPCIA_INT_ADR_EXT(h));
+		printk("MCPCIA_INT_MASK0 0x%x\n", *(vuip)MCPCIA_INT_MASK0(h));
+		printk("MCPCIA_INT_MASK1 0x%x\n", *(vuip)MCPCIA_INT_MASK1(h));
+		printk("MCPCIA_HBASE 0x%x\n", *(vuip)MCPCIA_HBASE(h));
+#endif
+
+		/* 
+		 * Set up error reporting. Make sure CPU_PE is OFF in the mask.
+		 */
+#if 0
+		mcpcia_err = *(vuip)MCPCIA_ERR_MASK(h);
+		mcpcia_err &= ~4;   
+		*(vuip)MCPCIA_ERR_MASK(h) = mcpcia_err;
+		mb();
+		mcpcia_err = *(vuip)MCPCIA_ERR_MASK;
+#endif
+
+		mcpcia_err = *(vuip)MCPCIA_CAP_ERR(h);
+		mcpcia_err |= 0x0006;   /* master/target abort */
+		*(vuip)MCPCIA_CAP_ERR(h) = mcpcia_err;
+		mb() ;
+		mcpcia_err = *(vuip)MCPCIA_CAP_ERR(h);
+
+		switch (alpha_use_srm_setup)
+		{
+		default:
+#if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_SRM_SETUP)
+			/* Check window 0 for enabled and mapped to 0. */
+			if (((*(vuip)MCPCIA_W0_BASE(h) & 3) == 1)
+			    && (*(vuip)MCPCIA_T0_BASE(h) == 0)
+			    && ((*(vuip)MCPCIA_W0_MASK(h) & 0xfff00000U) > 0x0ff00000U)) {
+				MCPCIA_DMA_WIN_BASE = *(vuip)MCPCIA_W0_BASE(h) & 0xfff00000U;
+				MCPCIA_DMA_WIN_SIZE = *(vuip)MCPCIA_W0_MASK(h) & 0xfff00000U;
+				MCPCIA_DMA_WIN_SIZE += 0x00100000U;
+#if 1
+				printk("mcpcia_init: using Window 0 settings\n");
+				printk("mcpcia_init: BASE 0x%x MASK 0x%x TRANS 0x%x\n",
+				       *(vuip)MCPCIA_W0_BASE(h),
+				       *(vuip)MCPCIA_W0_MASK(h),
+				       *(vuip)MCPCIA_T0_BASE(h));
+#endif
+				break;
+			}
+
+			/* Check window 1 for enabled and mapped to 0.  */
+			if (((*(vuip)MCPCIA_W1_BASE(h) & 3) == 1)
+			    && (*(vuip)MCPCIA_T1_BASE(h) == 0)
+			    && ((*(vuip)MCPCIA_W1_MASK(h) & 0xfff00000U) > 0x0ff00000U)) {
+				MCPCIA_DMA_WIN_BASE = *(vuip)MCPCIA_W1_BASE(h) & 0xfff00000U;
+				MCPCIA_DMA_WIN_SIZE = *(vuip)MCPCIA_W1_MASK(h) & 0xfff00000U;
+				MCPCIA_DMA_WIN_SIZE += 0x00100000U;
+#if 1
+				printk("mcpcia_init: using Window 1 settings\n");
+				printk("mcpcia_init: BASE 0x%x MASK 0x%x TRANS 0x%x\n",
+				       *(vuip)MCPCIA_W1_BASE(h),
+				       *(vuip)MCPCIA_W1_MASK(h),
+				       *(vuip)MCPCIA_T1_BASE(h));
+#endif
+				break;
+			}
+
+			/* Check window 2 for enabled and mapped to 0.  */
+			if (((*(vuip)MCPCIA_W2_BASE(h) & 3) == 1)
+			    && (*(vuip)MCPCIA_T2_BASE(h) == 0)
+			    && ((*(vuip)MCPCIA_W2_MASK(h) & 0xfff00000U) > 0x0ff00000U)) {
+				MCPCIA_DMA_WIN_BASE = *(vuip)MCPCIA_W2_BASE(h) & 0xfff00000U;
+				MCPCIA_DMA_WIN_SIZE = *(vuip)MCPCIA_W2_MASK(h) & 0xfff00000U;
+				MCPCIA_DMA_WIN_SIZE += 0x00100000U;
+#if 1
+				printk("mcpcia_init: using Window 2 settings\n");
+				printk("mcpcia_init: BASE 0x%x MASK 0x%x TRANS 0x%x\n",
+				       *(vuip)MCPCIA_W2_BASE(h),
+				       *(vuip)MCPCIA_W2_MASK(h),
+				       *(vuip)MCPCIA_T2_BASE(h));
+#endif
+				break;
+			}
+
+			/* Check window 3 for enabled and mapped to 0.  */
+			if (((*(vuip)MCPCIA_W3_BASE(h) & 3) == 1)
+			    && (*(vuip)MCPCIA_T3_BASE(h) == 0)
+			    && ((*(vuip)MCPCIA_W3_MASK(h) & 0xfff00000U) > 0x0ff00000U)) {
+				MCPCIA_DMA_WIN_BASE = *(vuip)MCPCIA_W3_BASE(h) & 0xfff00000U;
+				MCPCIA_DMA_WIN_SIZE = *(vuip)MCPCIA_W3_MASK(h) & 0xfff00000U;
+				MCPCIA_DMA_WIN_SIZE += 0x00100000U;
+#if 1
+				printk("mcpcia_init: using Window 3 settings\n");
+				printk("mcpcia_init: BASE 0x%x MASK 0x%x TRANS 0x%x\n",
+				       *(vuip)MCPCIA_W3_BASE(h),
+				       *(vuip)MCPCIA_W3_MASK(h),
+				       *(vuip)MCPCIA_T3_BASE(h));
+#endif
+				break;
+			}
+
+			/* Otherwise, we must use our defaults.  */
+			MCPCIA_DMA_WIN_BASE = MCPCIA_DMA_WIN_BASE_DEFAULT;
+			MCPCIA_DMA_WIN_SIZE = MCPCIA_DMA_WIN_SIZE_DEFAULT;
+#endif
+		case 0:
+			/*
+			 * Set up the PCI->physical memory translation windows.
+			 * For now, windows 1,2 and 3 are disabled.  In the
+			 * future, we may want to use them to do scatter/
+			 * gather DMA.
+			 *
+			 * Window 0 goes at 1 GB and is 1 GB large.
+			 */
+
+			*(vuip)MCPCIA_W0_BASE(h) = 1U | (MCPCIA_DMA_WIN_BASE_DEFAULT & 0xfff00000U);
+			*(vuip)MCPCIA_W0_MASK(h) = (MCPCIA_DMA_WIN_SIZE_DEFAULT - 1) & 0xfff00000U;
+			*(vuip)MCPCIA_T0_BASE(h) = 0;
+
+			*(vuip)MCPCIA_W1_BASE(h) = 0x0 ;
+			*(vuip)MCPCIA_W2_BASE(h) = 0x0 ;
+			*(vuip)MCPCIA_W3_BASE(h) = 0x0 ;
+
+			*(vuip)MCPCIA_HBASE(h) = 0x0 ;
+			mb();
+			break;
+		}
+#if 0
+		{
+			unsigned int mcpcia_int_ctl = *((vuip)MCPCIA_INT_CTL(h));
+			printk("mcpcia_init: INT_CTL was 0x%x\n", mcpcia_int_ctl);
+			*(vuip)MCPCIA_INT_CTL(h) = 1U; mb();
+			mcpcia_int_ctl = *(vuip)MCPCIA_INT_CTL(h);
+		}
+#endif
+
+		/*
+		 * Sigh... For the SRM setup, unless we know apriori what the HAE
+		 * contents will be, we need to setup the arbitrary region bases
+		 * so we can test against the range of addresses and tailor the
+		 * region chosen for the SPARSE memory access.
+		 *
+		 * See include/asm-alpha/mcpcia.h for the SPARSE mem read/write.
+		 */
+		if (alpha_use_srm_setup) {
+			unsigned int mcpcia_hae_mem = *(vuip)MCPCIA_HAE_MEM(h);
+
+			alpha_mv.sm_base_r1 = (mcpcia_hae_mem      ) & 0xe0000000UL;
+			alpha_mv.sm_base_r2 = (mcpcia_hae_mem << 16) & 0xf8000000UL;
+			alpha_mv.sm_base_r3 = (mcpcia_hae_mem << 24) & 0xfc000000UL;
+
+			/*
+			 * Set the HAE cache, so that setup_arch() code
+			 * will use the SRM setting always. Our readb/writeb
+			 * code in mcpcia.h expects never to have to change
+			 * the contents of the HAE.
+			 */
+			alpha_mv.hae_cache = mcpcia_hae_mem;
+
+			alpha_mv.mv_readb = mcpcia_srm_readb;
+			alpha_mv.mv_readw = mcpcia_srm_readw;
+			alpha_mv.mv_writeb = mcpcia_srm_writeb;
+			alpha_mv.mv_writew = mcpcia_srm_writew;
+		} else {
+			*(vuip)MCPCIA_HAE_MEM(h) = 0U; mb();
+			*(vuip)MCPCIA_HAE_MEM(h); /* read it back. */
+			*(vuip)MCPCIA_HAE_IO(h) = 0; mb();
+			*(vuip)MCPCIA_HAE_IO(h);  /* read it back. */
+		}
+	}
+}
+
+static int
+mcpcia_pci_clr_err(int h)
+{
+	unsigned int cpu = smp_processor_id();
+
+	MCPCIA_jd[cpu] = *(vuip)MCPCIA_CAP_ERR(h);
+#if 0
+	DBG_MCK(("MCPCIA_pci_clr_err: MCPCIA CAP_ERR(%d) after read 0x%x\n",
+		 h, MCPCIA_jd[cpu]));
+#endif
+	*(vuip)MCPCIA_CAP_ERR(h) = 0xffffffff; mb(); /* clear them all */
+	MCPCIA_jd[cpu] = *(vuip)MCPCIA_CAP_ERR(h);
+	return 0;
+}
+
+static void
+mcpcia_print_uncorrectable(struct el_MCPCIA_uncorrected_frame_mcheck *logout)
+{
+	struct el_common_EV5_uncorrectable_mcheck *frame;
+	int i;
+
+	frame = &logout->procdata;
+
+	/* Print PAL fields */
+	for (i = 0; i < 24; i += 2) {
+		printk("\tpal temp[%d-%d]\t\t= %16lx %16lx\n\r",
+		       i, i+1, frame->paltemp[i], frame->paltemp[i+1]);
+	}
+	for (i = 0; i < 8; i += 2) {
+		printk("\tshadow[%d-%d]\t\t= %16lx %16lx\n\r",
+		       i, i+1, frame->shadow[i], 
+		       frame->shadow[i+1]);
+	}
+	printk("\tAddr of excepting instruction\t= %16lx\n\r",
+	       frame->exc_addr);
+	printk("\tSummary of arithmetic traps\t= %16lx\n\r",
+	       frame->exc_sum);
+	printk("\tException mask\t\t\t= %16lx\n\r",
+	       frame->exc_mask);
+	printk("\tBase address for PALcode\t= %16lx\n\r",
+	       frame->pal_base);
+	printk("\tInterrupt Status Reg\t\t= %16lx\n\r",
+	       frame->isr);
+	printk("\tCURRENT SETUP OF EV5 IBOX\t= %16lx\n\r",
+	       frame->icsr);
+	printk("\tI-CACHE Reg %s parity error\t= %16lx\n\r",
+	       (frame->ic_perr_stat & 0x800L) ? 
+	       "Data" : "Tag", 
+	       frame->ic_perr_stat); 
+	printk("\tD-CACHE error Reg\t\t= %16lx\n\r",
+	       frame->dc_perr_stat);
+	if (frame->dc_perr_stat & 0x2) {
+		switch (frame->dc_perr_stat & 0x03c) {
+		case 8:
+			printk("\t\tData error in bank 1\n\r");
+			break;
+		case 4:
+			printk("\t\tData error in bank 0\n\r");
+			break;
+		case 20:
+			printk("\t\tTag error in bank 1\n\r");
+			break;
+		case 10:
+			printk("\t\tTag error in bank 0\n\r");
+			break;
+		}
+	}
+	printk("\tEffective VA\t\t\t= %16lx\n\r",
+	       frame->va);
+	printk("\tReason for D-stream\t\t= %16lx\n\r",
+	       frame->mm_stat);
+	printk("\tEV5 SCache address\t\t= %16lx\n\r",
+	       frame->sc_addr);
+	printk("\tEV5 SCache TAG/Data parity\t= %16lx\n\r",
+	       frame->sc_stat);
+	printk("\tEV5 BC_TAG_ADDR\t\t\t= %16lx\n\r",
+	       frame->bc_tag_addr);
+	printk("\tEV5 EI_ADDR: Phys addr of Xfer\t= %16lx\n\r",
+	       frame->ei_addr);
+	printk("\tFill Syndrome\t\t\t= %16lx\n\r",
+	       frame->fill_syndrome);
+	printk("\tEI_STAT reg\t\t\t= %16lx\n\r",
+	       frame->ei_stat);
+	printk("\tLD_LOCK\t\t\t\t= %16lx\n\r",
+	       frame->ld_lock);
+}
+
+void
+mcpcia_machine_check(unsigned long type, unsigned long la_ptr,
+		     struct pt_regs * regs)
+{
+#if 0
+        printk("mcpcia machine check ignored\n") ;
+#else
+	struct el_common *mchk_header;
+	struct el_MCPCIA_uncorrected_frame_mcheck *mchk_logout;
+	unsigned int cpu = smp_processor_id();
+	int h = 0;
+
+	mchk_header = (struct el_common *)la_ptr;
+	mchk_logout = (struct el_MCPCIA_uncorrected_frame_mcheck *)la_ptr;
+
+#if 0
+	DBG_MCK(("mcpcia_machine_check: type=0x%lx la_ptr=0x%lx\n",
+		 type, la_ptr));
+	DBG_MCK(("\t\t pc=0x%lx size=0x%x procoffset=0x%x sysoffset 0x%x\n",
+		 regs->pc, mchk_header->size, mchk_header->proc_offset,
+		 mchk_header->sys_offset));
+#endif
+	/*
+	 * Check if machine check is due to a badaddr() and if so,
+	 * ignore the machine check.
+	 */
+	mb();
+	mb();  /* magic */
+	if (MCPCIA_mcheck_expected[cpu]) {
+#if 0
+		DBG_MCK(("MCPCIA machine check expected\n"));
+#endif
+		MCPCIA_mcheck_expected[cpu] = 0;
+		MCPCIA_mcheck_taken[cpu] = 1;
+		mb();
+		mb();  /* magic */
+		draina();
+		mcpcia_pci_clr_err(h);
+		wrmces(0x7);
+		mb();
+	}
+#if 1
+	else {
+		printk("MCPCIA machine check NOT expected on CPU %d\n", cpu);
+		DBG_MCK(("mcpcia_machine_check: type=0x%lx pc=0x%lx"
+			 " code=0x%lx\n",
+			 type, regs->pc, mchk_header->code));
+
+		MCPCIA_mcheck_expected[cpu] = 0;
+		MCPCIA_mcheck_taken[cpu] = 1;
+		mb();
+		mb();  /* magic */
+		draina();
+		mcpcia_pci_clr_err(h);
+		wrmces(0x7);
+		mb();
+#ifdef DEBUG_MCHECK_DUMP
+		if (type == 0x620)
+			printk("MCPCIA machine check: system CORRECTABLE!\n");
+		else if (type == 0x630)
+			printk("MCPCIA machine check: processor CORRECTABLE!\n");
+		else
+			mcpcia_print_uncorrectable(mchk_logout);
+#endif /* DEBUG_MCHECK_DUMP */
+	}
+#endif
+#endif
+}
+
+/*==========================================================================*/
+
+#define PRIMARY(b) ((b)&0xff)
+#define SECONDARY(b) (((b)>>8)&0xff)
+#define SUBORDINATE(b) (((b)>>16)&0xff)
+
+static int __init
+hose_scan_bridges(struct linux_hose_info *hose, unsigned char bus)
+{
+	unsigned int devfn, l, class;
+	unsigned char hdr_type = 0;
+	unsigned int found = 0;
+
+	for (devfn = 0; devfn < 0xff; ++devfn) {
+		if (PCI_FUNC(devfn) == 0) {
+			hose_read_config_byte(bus, devfn, PCI_HEADER_TYPE,
+					      &hdr_type, hose);
+		} else if (!(hdr_type & 0x80)) {
+			/* not a multi-function device */
+			continue;
+		}
+
+		/* Check if there is anything here. */
+		hose_read_config_dword(bus, devfn, PCI_VENDOR_ID, &l, hose);
+		if (l == 0xffffffff || l == 0x00000000) {
+			hdr_type = 0;
+			continue;
+		}
+
+		/* See if this is a bridge device. */
+		hose_read_config_dword(bus, devfn, PCI_CLASS_REVISION,
+				       &class, hose);
+
+		if ((class >> 16) == PCI_CLASS_BRIDGE_PCI) {
+			unsigned int busses;
+
+			found++;
+
+			hose_read_config_dword(bus, devfn, PCI_PRIMARY_BUS,
+					       &busses, hose);
+
+			DBG_PCI(("hose_scan_bridges: hose %d bus %d "
+				 "slot %d busses 0x%x\n",
+				 hose->pci_hose_index, bus, PCI_SLOT(devfn),
+				 busses));
+
+			/*
+			 * Do something with first_busno and last_busno
+			 */
+			if (hose->pci_first_busno > PRIMARY(busses)) {
+				hose->pci_first_busno = PRIMARY(busses);
+				DBG_PCI(("hose_scan_bridges: hose %d bus %d "
+					 "slot %d change first to %d\n",
+					 hose->pci_hose_index, bus,
+					 PCI_SLOT(devfn), PRIMARY(busses)));
+			}
+			if (hose->pci_last_busno < SUBORDINATE(busses)) {
+				hose->pci_last_busno = SUBORDINATE(busses);
+				DBG_PCI(("hose_scan_bridges: hose %d bus %d "
+					 "slot %d change last to %d\n",
+					 hose->pci_hose_index, bus,
+					 PCI_SLOT(devfn),
+					 SUBORDINATE(busses)));
+			}
+			/*
+			 * Now scan everything underneath the bridge.
+			 */
+			hose_scan_bridges(hose, SECONDARY(busses));
+		}
+	}
+	return found;
+}
+
+static void __init
+hose_reconfigure_bridges(struct linux_hose_info *hose, unsigned char bus)
+{
+	unsigned int devfn, l, class;
+	unsigned char hdr_type = 0;
+
+	for (devfn = 0; devfn < 0xff; ++devfn) {
+		if (PCI_FUNC(devfn) == 0) {
+			hose_read_config_byte(bus, devfn, PCI_HEADER_TYPE,
+					      &hdr_type, hose);
+		} else if (!(hdr_type & 0x80)) {
+			/* not a multi-function device */
+			continue;
+		}
+
+		/* Check if there is anything here. */
+		hose_read_config_dword(bus, devfn, PCI_VENDOR_ID, &l, hose);
+		if (l == 0xffffffff || l == 0x00000000) {
+			hdr_type = 0;
+			continue;
+		}
+
+		/* See if this is a bridge device. */
+		hose_read_config_dword(bus, devfn, PCI_CLASS_REVISION,
+				       &class, hose);
+
+		if ((class >> 16) == PCI_CLASS_BRIDGE_PCI) {
+			unsigned int busses;
+
+			hose_read_config_dword(bus, devfn, PCI_PRIMARY_BUS,
+					       &busses, hose);
+
+			/*
+			 * First reconfigure everything underneath the bridge.
+			 */
+			hose_reconfigure_bridges(hose, (busses >> 8) & 0xff);
+
+			/*
+			 * Unconfigure this bridges bus numbers,
+			 * pci_scan_bus() will fix this up properly.
+			 */
+			busses &= 0xff000000;
+			hose_write_config_dword(bus, devfn, PCI_PRIMARY_BUS,
+						busses, hose);
+		}
+	}
+}
+
+static void __init
+mcpcia_fixup_busno(struct linux_hose_info *hose, unsigned char bus)
+{
+	unsigned int nbus;
+
+	/*
+	 * First, scan for all bridge devices underneath this hose,
+	 * to determine the first and last busnos.
+	 */
+	if (!hose_scan_bridges(hose, 0)) {
+		/* none found, exit */
+		hose->pci_first_busno = bus;
+		hose->pci_last_busno = bus;
+	} else {
+		/*
+		 * Reconfigure all bridge devices underneath this hose.
+		 */
+		hose_reconfigure_bridges(hose, hose->pci_first_busno);
+	}
+
+	/*
+	 * Now reconfigure the hose to it's new bus number and set up
+	 * our bus2hose mapping for this hose.
+	 */
+	nbus = hose->pci_last_busno - hose->pci_first_busno;
+
+	hose->pci_first_busno = bus;
+
+	DBG_PCI(("mcpcia_fixup_busno: hose %d startbus %d nbus %d\n",
+		 hose->pci_hose_index, bus, nbus));
+
+	do {
+		bus2hose[bus++] = hose;
+	} while (nbus-- > 0);
+}
+
+static void __init
+mcpcia_probe(struct linux_hose_info *hose)
+{
+	static struct pci_bus *pchain = NULL;
+	struct pci_bus *pbus = &hose->pci_bus;
+	static unsigned char busno = 0;
+
+	/*
+	 * Hoses include child PCI bridges in bus-range property,
+	 * but we don't scan each of those ourselves, Linux generic PCI
+	 * probing code will find child bridges and link them into this
+	 * hose's root PCI device hierarchy.
+	 */
+
+	pbus->number = pbus->secondary = busno;
+	pbus->sysdata = hose;
+
+	mcpcia_fixup_busno(hose, busno);
+
+	pbus->subordinate = pci_scan_bus(pbus); /* the original! */
+
+	/*
+	 * Set the maximum subordinate bus of this hose.
+	 */
+	hose->pci_last_busno = pbus->subordinate;
+#if 0
+	hose_write_config_byte(busno, 0, 0x41, hose->pci_last_busno, hose);
+#endif
+	busno = pbus->subordinate + 1;
+
+	/*
+	 * Fixup the chain of primary PCI busses.
+	 */
+	if (pchain) {
+		pchain->next = &hose->pci_bus;
+		pchain = pchain->next;
+	} else {
+		pchain = &pci_root;
+		memcpy(pchain, &hose->pci_bus, sizeof(pci_root));
+	}
+}
+
+void __init
+mcpcia_pci_fixup(void)
+{
+	struct linux_hose_info *hose;
+
+	/* Turn on Config space access finally! */
+	pci_probe_enabled = 1;
+
+	/* For each hose, probe and setup the devices on the hose.  */
+	for (hose = mcpcia_root; hose; hose = hose->next)
+		mcpcia_probe(hose);
+}
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TCL-scripts by Sam Shen, slshen@lbl.gov