|  | /* | 
|  | *	linux/arch/alpha/kernel/sys_sable.c | 
|  | * | 
|  | *	Copyright (C) 1995 David A Rusling | 
|  | *	Copyright (C) 1996 Jay A Estabrook | 
|  | *	Copyright (C) 1998, 1999 Richard Henderson | 
|  | * | 
|  | * Code supporting the Sable, Sable-Gamma, and Lynx systems. | 
|  | */ | 
|  |  | 
|  | #include <linux/kernel.h> | 
|  | #include <linux/types.h> | 
|  | #include <linux/mm.h> | 
|  | #include <linux/sched.h> | 
|  | #include <linux/pci.h> | 
|  | #include <linux/init.h> | 
|  |  | 
|  | #include <asm/ptrace.h> | 
|  | #include <asm/dma.h> | 
|  | #include <asm/irq.h> | 
|  | #include <asm/mmu_context.h> | 
|  | #include <asm/io.h> | 
|  | #include <asm/pgtable.h> | 
|  | #include <asm/core_t2.h> | 
|  | #include <asm/tlbflush.h> | 
|  |  | 
|  | #include "proto.h" | 
|  | #include "irq_impl.h" | 
|  | #include "pci_impl.h" | 
|  | #include "machvec_impl.h" | 
|  |  | 
|  | DEFINE_SPINLOCK(sable_lynx_irq_lock); | 
|  |  | 
|  | typedef struct irq_swizzle_struct | 
|  | { | 
|  | char irq_to_mask[64]; | 
|  | char mask_to_irq[64]; | 
|  |  | 
|  | /* Note mask bit is true for DISABLED irqs.  */ | 
|  | unsigned long shadow_mask; | 
|  |  | 
|  | void (*update_irq_hw)(unsigned long bit, unsigned long mask); | 
|  | void (*ack_irq_hw)(unsigned long bit); | 
|  |  | 
|  | } irq_swizzle_t; | 
|  |  | 
|  | static irq_swizzle_t *sable_lynx_irq_swizzle; | 
|  |  | 
|  | static void sable_lynx_init_irq(int nr_of_irqs); | 
|  |  | 
|  | #if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_SABLE) | 
|  |  | 
|  | /***********************************************************************/ | 
|  | /* | 
|  | *   For SABLE, which is really baroque, we manage 40 IRQ's, but the | 
|  | *   hardware really only supports 24, not via normal ISA PIC, | 
|  | *   but cascaded custom 8259's, etc. | 
|  | *	 0-7  (char at 536) | 
|  | *	 8-15 (char at 53a) | 
|  | *	16-23 (char at 53c) | 
|  | * | 
|  | * Summary Registers (536/53a/53c): | 
|  | * | 
|  | * Bit      Meaning               Kernel IRQ | 
|  | *------------------------------------------ | 
|  | * 0        PCI slot 0			34 | 
|  | * 1        NCR810 (builtin)		33 | 
|  | * 2        TULIP (builtin)		32 | 
|  | * 3        mouse			12 | 
|  | * 4        PCI slot 1			35 | 
|  | * 5        PCI slot 2			36 | 
|  | * 6        keyboard			1 | 
|  | * 7        floppy			6 | 
|  | * 8        COM2			3 | 
|  | * 9        parallel port		7 | 
|  | *10        EISA irq 3			- | 
|  | *11        EISA irq 4			- | 
|  | *12        EISA irq 5			5 | 
|  | *13        EISA irq 6			- | 
|  | *14        EISA irq 7			- | 
|  | *15        COM1			4 | 
|  | *16        EISA irq 9			9 | 
|  | *17        EISA irq 10			10 | 
|  | *18        EISA irq 11			11 | 
|  | *19        EISA irq 12			- | 
|  | *20        EISA irq 13			- | 
|  | *21        EISA irq 14			14 | 
|  | *22        NC				15 | 
|  | *23        IIC				- | 
|  | */ | 
|  |  | 
|  | static void | 
|  | sable_update_irq_hw(unsigned long bit, unsigned long mask) | 
|  | { | 
|  | int port = 0x537; | 
|  |  | 
|  | if (bit >= 16) { | 
|  | port = 0x53d; | 
|  | mask >>= 16; | 
|  | } else if (bit >= 8) { | 
|  | port = 0x53b; | 
|  | mask >>= 8; | 
|  | } | 
|  |  | 
|  | outb(mask, port); | 
|  | } | 
|  |  | 
|  | static void | 
|  | sable_ack_irq_hw(unsigned long bit) | 
|  | { | 
|  | int port, val1, val2; | 
|  |  | 
|  | if (bit >= 16) { | 
|  | port = 0x53c; | 
|  | val1 = 0xE0 | (bit - 16); | 
|  | val2 = 0xE0 | 4; | 
|  | } else if (bit >= 8) { | 
|  | port = 0x53a; | 
|  | val1 = 0xE0 | (bit - 8); | 
|  | val2 = 0xE0 | 3; | 
|  | } else { | 
|  | port = 0x536; | 
|  | val1 = 0xE0 | (bit - 0); | 
|  | val2 = 0xE0 | 1; | 
|  | } | 
|  |  | 
|  | outb(val1, port);	/* ack the slave */ | 
|  | outb(val2, 0x534);	/* ack the master */ | 
|  | } | 
|  |  | 
|  | static irq_swizzle_t sable_irq_swizzle = { | 
|  | { | 
|  | -1,  6, -1,  8, 15, 12,  7,  9,	/* pseudo PIC  0-7  */ | 
|  | -1, 16, 17, 18,  3, -1, 21, 22,	/* pseudo PIC  8-15 */ | 
|  | -1, -1, -1, -1, -1, -1, -1, -1,	/* pseudo EISA 0-7  */ | 
|  | -1, -1, -1, -1, -1, -1, -1, -1,	/* pseudo EISA 8-15  */ | 
|  | 2,  1,  0,  4,  5, -1, -1, -1,	/* pseudo PCI */ | 
|  | -1, -1, -1, -1, -1, -1, -1, -1,	/*  */ | 
|  | -1, -1, -1, -1, -1, -1, -1, -1,	/*  */ | 
|  | -1, -1, -1, -1, -1, -1, -1, -1 	/*  */ | 
|  | }, | 
|  | { | 
|  | 34, 33, 32, 12, 35, 36,  1,  6,	/* mask 0-7  */ | 
|  | 3,  7, -1, -1,  5, -1, -1,  4,	/* mask 8-15  */ | 
|  | 9, 10, 11, -1, -1, 14, 15, -1,	/* mask 16-23  */ | 
|  | -1, -1, -1, -1, -1, -1, -1, -1,	/*  */ | 
|  | -1, -1, -1, -1, -1, -1, -1, -1,	/*  */ | 
|  | -1, -1, -1, -1, -1, -1, -1, -1,	/*  */ | 
|  | -1, -1, -1, -1, -1, -1, -1, -1,	/*  */ | 
|  | -1, -1, -1, -1, -1, -1, -1, -1	/*  */ | 
|  | }, | 
|  | -1, | 
|  | sable_update_irq_hw, | 
|  | sable_ack_irq_hw | 
|  | }; | 
|  |  | 
|  | static void __init | 
|  | sable_init_irq(void) | 
|  | { | 
|  | outb(-1, 0x537);	/* slave 0 */ | 
|  | outb(-1, 0x53b);	/* slave 1 */ | 
|  | outb(-1, 0x53d);	/* slave 2 */ | 
|  | outb(0x44, 0x535);	/* enable cascades in master */ | 
|  |  | 
|  | sable_lynx_irq_swizzle = &sable_irq_swizzle; | 
|  | sable_lynx_init_irq(40); | 
|  | } | 
|  |  | 
|  | /* | 
|  | * PCI Fixup configuration for ALPHA SABLE (2100). | 
|  | * | 
|  | * The device to slot mapping looks like: | 
|  | * | 
|  | * Slot     Device | 
|  | *  0       TULIP | 
|  | *  1       SCSI | 
|  | *  2       PCI-EISA bridge | 
|  | *  3       none | 
|  | *  4       none | 
|  | *  5       none | 
|  | *  6       PCI on board slot 0 | 
|  | *  7       PCI on board slot 1 | 
|  | *  8       PCI on board slot 2 | 
|  | * | 
|  | * | 
|  | * This two layered interrupt approach means that we allocate IRQ 16 and | 
|  | * above for PCI interrupts.  The IRQ relates to which bit the interrupt | 
|  | * comes in on.  This makes interrupt processing much easier. | 
|  | */ | 
|  | /* | 
|  | * NOTE: the IRQ assignments below are arbitrary, but need to be consistent | 
|  | * with the values in the irq swizzling tables above. | 
|  | */ | 
|  |  | 
|  | static int __init | 
|  | sable_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) | 
|  | { | 
|  | static char irq_tab[9][5] __initdata = { | 
|  | /*INT    INTA   INTB   INTC   INTD */ | 
|  | { 32+0,  32+0,  32+0,  32+0,  32+0},  /* IdSel 0,  TULIP  */ | 
|  | { 32+1,  32+1,  32+1,  32+1,  32+1},  /* IdSel 1,  SCSI   */ | 
|  | {   -1,    -1,    -1,    -1,    -1},  /* IdSel 2,  SIO   */ | 
|  | {   -1,    -1,    -1,    -1,    -1},  /* IdSel 3,  none   */ | 
|  | {   -1,    -1,    -1,    -1,    -1},  /* IdSel 4,  none   */ | 
|  | {   -1,    -1,    -1,    -1,    -1},  /* IdSel 5,  none   */ | 
|  | { 32+2,  32+2,  32+2,  32+2,  32+2},  /* IdSel 6,  slot 0 */ | 
|  | { 32+3,  32+3,  32+3,  32+3,  32+3},  /* IdSel 7,  slot 1 */ | 
|  | { 32+4,  32+4,  32+4,  32+4,  32+4}   /* IdSel 8,  slot 2 */ | 
|  | }; | 
|  | long min_idsel = 0, max_idsel = 8, irqs_per_slot = 5; | 
|  | return COMMON_TABLE_LOOKUP; | 
|  | } | 
|  | #endif /* defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_SABLE) */ | 
|  |  | 
|  | #if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_LYNX) | 
|  |  | 
|  | /***********************************************************************/ | 
|  | /* LYNX hardware specifics | 
|  | */ | 
|  | /* | 
|  | *   For LYNX, which is also baroque, we manage 64 IRQs, via a custom IC. | 
|  | * | 
|  | * Bit      Meaning               Kernel IRQ | 
|  | *------------------------------------------ | 
|  | * 0 | 
|  | * 1 | 
|  | * 2 | 
|  | * 3        mouse			12 | 
|  | * 4 | 
|  | * 5 | 
|  | * 6        keyboard			1 | 
|  | * 7        floppy			6 | 
|  | * 8        COM2			3 | 
|  | * 9        parallel port		7 | 
|  | *10        EISA irq 3			- | 
|  | *11        EISA irq 4			- | 
|  | *12        EISA irq 5			5 | 
|  | *13        EISA irq 6			- | 
|  | *14        EISA irq 7			- | 
|  | *15        COM1			4 | 
|  | *16        EISA irq 9			9 | 
|  | *17        EISA irq 10			10 | 
|  | *18        EISA irq 11			11 | 
|  | *19        EISA irq 12			- | 
|  | *20 | 
|  | *21        EISA irq 14			14 | 
|  | *22        EISA irq 15			15 | 
|  | *23        IIC				- | 
|  | *24        VGA (builtin)               - | 
|  | *25 | 
|  | *26 | 
|  | *27 | 
|  | *28        NCR810 (builtin)		28 | 
|  | *29 | 
|  | *30 | 
|  | *31 | 
|  | *32        PCI 0 slot 4 A primary bus  32 | 
|  | *33        PCI 0 slot 4 B primary bus  33 | 
|  | *34        PCI 0 slot 4 C primary bus  34 | 
|  | *35        PCI 0 slot 4 D primary bus | 
|  | *36        PCI 0 slot 5 A primary bus | 
|  | *37        PCI 0 slot 5 B primary bus | 
|  | *38        PCI 0 slot 5 C primary bus | 
|  | *39        PCI 0 slot 5 D primary bus | 
|  | *40        PCI 0 slot 6 A primary bus | 
|  | *41        PCI 0 slot 6 B primary bus | 
|  | *42        PCI 0 slot 6 C primary bus | 
|  | *43        PCI 0 slot 6 D primary bus | 
|  | *44        PCI 0 slot 7 A primary bus | 
|  | *45        PCI 0 slot 7 B primary bus | 
|  | *46        PCI 0 slot 7 C primary bus | 
|  | *47        PCI 0 slot 7 D primary bus | 
|  | *48        PCI 0 slot 0 A secondary bus | 
|  | *49        PCI 0 slot 0 B secondary bus | 
|  | *50        PCI 0 slot 0 C secondary bus | 
|  | *51        PCI 0 slot 0 D secondary bus | 
|  | *52        PCI 0 slot 1 A secondary bus | 
|  | *53        PCI 0 slot 1 B secondary bus | 
|  | *54        PCI 0 slot 1 C secondary bus | 
|  | *55        PCI 0 slot 1 D secondary bus | 
|  | *56        PCI 0 slot 2 A secondary bus | 
|  | *57        PCI 0 slot 2 B secondary bus | 
|  | *58        PCI 0 slot 2 C secondary bus | 
|  | *59        PCI 0 slot 2 D secondary bus | 
|  | *60        PCI 0 slot 3 A secondary bus | 
|  | *61        PCI 0 slot 3 B secondary bus | 
|  | *62        PCI 0 slot 3 C secondary bus | 
|  | *63        PCI 0 slot 3 D secondary bus | 
|  | */ | 
|  |  | 
|  | static void | 
|  | lynx_update_irq_hw(unsigned long bit, unsigned long mask) | 
|  | { | 
|  | /* | 
|  | * Write the AIR register on the T3/T4 with the | 
|  | * address of the IC mask register (offset 0x40) | 
|  | */ | 
|  | *(vulp)T2_AIR = 0x40; | 
|  | mb(); | 
|  | *(vulp)T2_AIR; /* re-read to force write */ | 
|  | mb(); | 
|  | *(vulp)T2_DIR = mask; | 
|  | mb(); | 
|  | mb(); | 
|  | } | 
|  |  | 
|  | static void | 
|  | lynx_ack_irq_hw(unsigned long bit) | 
|  | { | 
|  | *(vulp)T2_VAR = (u_long) bit; | 
|  | mb(); | 
|  | mb(); | 
|  | } | 
|  |  | 
|  | static irq_swizzle_t lynx_irq_swizzle = { | 
|  | { /* irq_to_mask */ | 
|  | -1,  6, -1,  8, 15, 12,  7,  9,	/* pseudo PIC  0-7  */ | 
|  | -1, 16, 17, 18,  3, -1, 21, 22,	/* pseudo PIC  8-15 */ | 
|  | -1, -1, -1, -1, -1, -1, -1, -1,	/* pseudo */ | 
|  | -1, -1, -1, -1, 28, -1, -1, -1,	/* pseudo */ | 
|  | 32, 33, 34, 35, 36, 37, 38, 39,	/* mask 32-39 */ | 
|  | 40, 41, 42, 43, 44, 45, 46, 47,	/* mask 40-47 */ | 
|  | 48, 49, 50, 51, 52, 53, 54, 55,	/* mask 48-55 */ | 
|  | 56, 57, 58, 59, 60, 61, 62, 63	/* mask 56-63 */ | 
|  | }, | 
|  | { /* mask_to_irq */ | 
|  | -1, -1, -1, 12, -1, -1,  1,  6,	/* mask 0-7   */ | 
|  | 3,  7, -1, -1,  5, -1, -1,  4,	/* mask 8-15  */ | 
|  | 9, 10, 11, -1, -1, 14, 15, -1,	/* mask 16-23 */ | 
|  | -1, -1, -1, -1, 28, -1, -1, -1,	/* mask 24-31 */ | 
|  | 32, 33, 34, 35, 36, 37, 38, 39,	/* mask 32-39 */ | 
|  | 40, 41, 42, 43, 44, 45, 46, 47,	/* mask 40-47 */ | 
|  | 48, 49, 50, 51, 52, 53, 54, 55,	/* mask 48-55 */ | 
|  | 56, 57, 58, 59, 60, 61, 62, 63	/* mask 56-63 */ | 
|  | }, | 
|  | -1, | 
|  | lynx_update_irq_hw, | 
|  | lynx_ack_irq_hw | 
|  | }; | 
|  |  | 
|  | static void __init | 
|  | lynx_init_irq(void) | 
|  | { | 
|  | sable_lynx_irq_swizzle = &lynx_irq_swizzle; | 
|  | sable_lynx_init_irq(64); | 
|  | } | 
|  |  | 
|  | /* | 
|  | * PCI Fixup configuration for ALPHA LYNX (2100A) | 
|  | * | 
|  | * The device to slot mapping looks like: | 
|  | * | 
|  | * Slot     Device | 
|  | *  0       none | 
|  | *  1       none | 
|  | *  2       PCI-EISA bridge | 
|  | *  3       PCI-PCI bridge | 
|  | *  4       NCR 810 (Demi-Lynx only) | 
|  | *  5       none | 
|  | *  6       PCI on board slot 4 | 
|  | *  7       PCI on board slot 5 | 
|  | *  8       PCI on board slot 6 | 
|  | *  9       PCI on board slot 7 | 
|  | * | 
|  | * And behind the PPB we have: | 
|  | * | 
|  | * 11       PCI on board slot 0 | 
|  | * 12       PCI on board slot 1 | 
|  | * 13       PCI on board slot 2 | 
|  | * 14       PCI on board slot 3 | 
|  | */ | 
|  | /* | 
|  | * NOTE: the IRQ assignments below are arbitrary, but need to be consistent | 
|  | * with the values in the irq swizzling tables above. | 
|  | */ | 
|  |  | 
|  | static int __init | 
|  | lynx_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) | 
|  | { | 
|  | static char irq_tab[19][5] __initdata = { | 
|  | /*INT    INTA   INTB   INTC   INTD */ | 
|  | {   -1,    -1,    -1,    -1,    -1},  /* IdSel 13,  PCEB   */ | 
|  | {   -1,    -1,    -1,    -1,    -1},  /* IdSel 14,  PPB    */ | 
|  | {   28,    28,    28,    28,    28},  /* IdSel 15,  NCR demi */ | 
|  | {   -1,    -1,    -1,    -1,    -1},  /* IdSel 16,  none   */ | 
|  | {   32,    32,    33,    34,    35},  /* IdSel 17,  slot 4 */ | 
|  | {   36,    36,    37,    38,    39},  /* IdSel 18,  slot 5 */ | 
|  | {   40,    40,    41,    42,    43},  /* IdSel 19,  slot 6 */ | 
|  | {   44,    44,    45,    46,    47},  /* IdSel 20,  slot 7 */ | 
|  | {   -1,    -1,    -1,    -1,    -1},  /* IdSel 22,  none   */ | 
|  | /* The following are actually behind the PPB. */ | 
|  | {   -1,    -1,    -1,    -1,    -1},  /* IdSel 16   none */ | 
|  | {   28,    28,    28,    28,    28},  /* IdSel 17   NCR lynx */ | 
|  | {   -1,    -1,    -1,    -1,    -1},  /* IdSel 18   none */ | 
|  | {   -1,    -1,    -1,    -1,    -1},  /* IdSel 19   none */ | 
|  | {   -1,    -1,    -1,    -1,    -1},  /* IdSel 20   none */ | 
|  | {   -1,    -1,    -1,    -1,    -1},  /* IdSel 21   none */ | 
|  | {   48,    48,    49,    50,    51},  /* IdSel 22   slot 0 */ | 
|  | {   52,    52,    53,    54,    55},  /* IdSel 23   slot 1 */ | 
|  | {   56,    56,    57,    58,    59},  /* IdSel 24   slot 2 */ | 
|  | {   60,    60,    61,    62,    63}   /* IdSel 25   slot 3 */ | 
|  | }; | 
|  | const long min_idsel = 2, max_idsel = 20, irqs_per_slot = 5; | 
|  | return COMMON_TABLE_LOOKUP; | 
|  | } | 
|  |  | 
|  | static u8 __init | 
|  | lynx_swizzle(struct pci_dev *dev, u8 *pinp) | 
|  | { | 
|  | int slot, pin = *pinp; | 
|  |  | 
|  | if (dev->bus->number == 0) { | 
|  | slot = PCI_SLOT(dev->devfn); | 
|  | } | 
|  | /* Check for the built-in bridge */ | 
|  | else if (PCI_SLOT(dev->bus->self->devfn) == 3) { | 
|  | slot = PCI_SLOT(dev->devfn) + 11; | 
|  | } | 
|  | else | 
|  | { | 
|  | /* Must be a card-based bridge.  */ | 
|  | do { | 
|  | if (PCI_SLOT(dev->bus->self->devfn) == 3) { | 
|  | slot = PCI_SLOT(dev->devfn) + 11; | 
|  | break; | 
|  | } | 
|  | pin = pci_swizzle_interrupt_pin(dev, pin); | 
|  |  | 
|  | /* Move up the chain of bridges.  */ | 
|  | dev = dev->bus->self; | 
|  | /* Slot of the next bridge.  */ | 
|  | slot = PCI_SLOT(dev->devfn); | 
|  | } while (dev->bus->self); | 
|  | } | 
|  | *pinp = pin; | 
|  | return slot; | 
|  | } | 
|  |  | 
|  | #endif /* defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_LYNX) */ | 
|  |  | 
|  | /***********************************************************************/ | 
|  | /* GENERIC irq routines */ | 
|  |  | 
|  | static inline void | 
|  | sable_lynx_enable_irq(struct irq_data *d) | 
|  | { | 
|  | unsigned long bit, mask; | 
|  |  | 
|  | bit = sable_lynx_irq_swizzle->irq_to_mask[d->irq]; | 
|  | spin_lock(&sable_lynx_irq_lock); | 
|  | mask = sable_lynx_irq_swizzle->shadow_mask &= ~(1UL << bit); | 
|  | sable_lynx_irq_swizzle->update_irq_hw(bit, mask); | 
|  | spin_unlock(&sable_lynx_irq_lock); | 
|  | #if 0 | 
|  | printk("%s: mask 0x%lx bit 0x%lx irq 0x%x\n", | 
|  | __func__, mask, bit, irq); | 
|  | #endif | 
|  | } | 
|  |  | 
|  | static void | 
|  | sable_lynx_disable_irq(struct irq_data *d) | 
|  | { | 
|  | unsigned long bit, mask; | 
|  |  | 
|  | bit = sable_lynx_irq_swizzle->irq_to_mask[d->irq]; | 
|  | spin_lock(&sable_lynx_irq_lock); | 
|  | mask = sable_lynx_irq_swizzle->shadow_mask |= 1UL << bit; | 
|  | sable_lynx_irq_swizzle->update_irq_hw(bit, mask); | 
|  | spin_unlock(&sable_lynx_irq_lock); | 
|  | #if 0 | 
|  | printk("%s: mask 0x%lx bit 0x%lx irq 0x%x\n", | 
|  | __func__, mask, bit, irq); | 
|  | #endif | 
|  | } | 
|  |  | 
|  | static void | 
|  | sable_lynx_mask_and_ack_irq(struct irq_data *d) | 
|  | { | 
|  | unsigned long bit, mask; | 
|  |  | 
|  | bit = sable_lynx_irq_swizzle->irq_to_mask[d->irq]; | 
|  | spin_lock(&sable_lynx_irq_lock); | 
|  | mask = sable_lynx_irq_swizzle->shadow_mask |= 1UL << bit; | 
|  | sable_lynx_irq_swizzle->update_irq_hw(bit, mask); | 
|  | sable_lynx_irq_swizzle->ack_irq_hw(bit); | 
|  | spin_unlock(&sable_lynx_irq_lock); | 
|  | } | 
|  |  | 
|  | static struct irq_chip sable_lynx_irq_type = { | 
|  | .name		= "SABLE/LYNX", | 
|  | .irq_unmask	= sable_lynx_enable_irq, | 
|  | .irq_mask	= sable_lynx_disable_irq, | 
|  | .irq_mask_ack	= sable_lynx_mask_and_ack_irq, | 
|  | }; | 
|  |  | 
|  | static void | 
|  | sable_lynx_srm_device_interrupt(unsigned long vector) | 
|  | { | 
|  | /* Note that the vector reported by the SRM PALcode corresponds | 
|  | to the interrupt mask bits, but we have to manage via the | 
|  | so-called legacy IRQs for many common devices.  */ | 
|  |  | 
|  | int bit, irq; | 
|  |  | 
|  | bit = (vector - 0x800) >> 4; | 
|  | irq = sable_lynx_irq_swizzle->mask_to_irq[bit]; | 
|  | #if 0 | 
|  | printk("%s: vector 0x%lx bit 0x%x irq 0x%x\n", | 
|  | __func__, vector, bit, irq); | 
|  | #endif | 
|  | handle_irq(irq); | 
|  | } | 
|  |  | 
|  | static void __init | 
|  | sable_lynx_init_irq(int nr_of_irqs) | 
|  | { | 
|  | long i; | 
|  |  | 
|  | for (i = 0; i < nr_of_irqs; ++i) { | 
|  | irq_set_chip_and_handler(i, &sable_lynx_irq_type, | 
|  | handle_level_irq); | 
|  | irq_set_status_flags(i, IRQ_LEVEL); | 
|  | } | 
|  |  | 
|  | common_init_isa_dma(); | 
|  | } | 
|  |  | 
|  | static void __init | 
|  | sable_lynx_init_pci(void) | 
|  | { | 
|  | common_init_pci(); | 
|  | } | 
|  |  | 
|  | /*****************************************************************/ | 
|  | /* | 
|  | * The System Vectors | 
|  | * | 
|  | * In order that T2_HAE_ADDRESS should be a constant, we play | 
|  | * these games with GAMMA_BIAS. | 
|  | */ | 
|  |  | 
|  | #if defined(CONFIG_ALPHA_GENERIC) || \ | 
|  | (defined(CONFIG_ALPHA_SABLE) && !defined(CONFIG_ALPHA_GAMMA)) | 
|  | #undef GAMMA_BIAS | 
|  | #define GAMMA_BIAS 0 | 
|  | struct alpha_machine_vector sable_mv __initmv = { | 
|  | .vector_name		= "Sable", | 
|  | DO_EV4_MMU, | 
|  | DO_DEFAULT_RTC, | 
|  | DO_T2_IO, | 
|  | .machine_check		= t2_machine_check, | 
|  | .max_isa_dma_address	= ALPHA_SABLE_MAX_ISA_DMA_ADDRESS, | 
|  | .min_io_address		= EISA_DEFAULT_IO_BASE, | 
|  | .min_mem_address	= T2_DEFAULT_MEM_BASE, | 
|  |  | 
|  | .nr_irqs		= 40, | 
|  | .device_interrupt	= sable_lynx_srm_device_interrupt, | 
|  |  | 
|  | .init_arch		= t2_init_arch, | 
|  | .init_irq		= sable_init_irq, | 
|  | .init_rtc		= common_init_rtc, | 
|  | .init_pci		= sable_lynx_init_pci, | 
|  | .kill_arch		= t2_kill_arch, | 
|  | .pci_map_irq		= sable_map_irq, | 
|  | .pci_swizzle		= common_swizzle, | 
|  |  | 
|  | .sys = { .t2 = { | 
|  | .gamma_bias		= 0 | 
|  | } } | 
|  | }; | 
|  | ALIAS_MV(sable) | 
|  | #endif /* GENERIC || (SABLE && !GAMMA) */ | 
|  |  | 
|  | #if defined(CONFIG_ALPHA_GENERIC) || \ | 
|  | (defined(CONFIG_ALPHA_SABLE) && defined(CONFIG_ALPHA_GAMMA)) | 
|  | #undef GAMMA_BIAS | 
|  | #define GAMMA_BIAS _GAMMA_BIAS | 
|  | struct alpha_machine_vector sable_gamma_mv __initmv = { | 
|  | .vector_name		= "Sable-Gamma", | 
|  | DO_EV5_MMU, | 
|  | DO_DEFAULT_RTC, | 
|  | DO_T2_IO, | 
|  | .machine_check		= t2_machine_check, | 
|  | .max_isa_dma_address	= ALPHA_SABLE_MAX_ISA_DMA_ADDRESS, | 
|  | .min_io_address		= EISA_DEFAULT_IO_BASE, | 
|  | .min_mem_address	= T2_DEFAULT_MEM_BASE, | 
|  |  | 
|  | .nr_irqs		= 40, | 
|  | .device_interrupt	= sable_lynx_srm_device_interrupt, | 
|  |  | 
|  | .init_arch		= t2_init_arch, | 
|  | .init_irq		= sable_init_irq, | 
|  | .init_rtc		= common_init_rtc, | 
|  | .init_pci		= sable_lynx_init_pci, | 
|  | .kill_arch		= t2_kill_arch, | 
|  | .pci_map_irq		= sable_map_irq, | 
|  | .pci_swizzle		= common_swizzle, | 
|  |  | 
|  | .sys = { .t2 = { | 
|  | .gamma_bias		= _GAMMA_BIAS | 
|  | } } | 
|  | }; | 
|  | ALIAS_MV(sable_gamma) | 
|  | #endif /* GENERIC || (SABLE && GAMMA) */ | 
|  |  | 
|  | #if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_LYNX) | 
|  | #undef GAMMA_BIAS | 
|  | #define GAMMA_BIAS _GAMMA_BIAS | 
|  | struct alpha_machine_vector lynx_mv __initmv = { | 
|  | .vector_name		= "Lynx", | 
|  | DO_EV4_MMU, | 
|  | DO_DEFAULT_RTC, | 
|  | DO_T2_IO, | 
|  | .machine_check		= t2_machine_check, | 
|  | .max_isa_dma_address	= ALPHA_SABLE_MAX_ISA_DMA_ADDRESS, | 
|  | .min_io_address		= EISA_DEFAULT_IO_BASE, | 
|  | .min_mem_address	= T2_DEFAULT_MEM_BASE, | 
|  |  | 
|  | .nr_irqs		= 64, | 
|  | .device_interrupt	= sable_lynx_srm_device_interrupt, | 
|  |  | 
|  | .init_arch		= t2_init_arch, | 
|  | .init_irq		= lynx_init_irq, | 
|  | .init_rtc		= common_init_rtc, | 
|  | .init_pci		= sable_lynx_init_pci, | 
|  | .kill_arch		= t2_kill_arch, | 
|  | .pci_map_irq		= lynx_map_irq, | 
|  | .pci_swizzle		= lynx_swizzle, | 
|  |  | 
|  | .sys = { .t2 = { | 
|  | .gamma_bias		= _GAMMA_BIAS | 
|  | } } | 
|  | }; | 
|  | ALIAS_MV(lynx) | 
|  | #endif /* GENERIC || LYNX */ |