// SPDX-License-Identifier: GPL-2.0 /* * linux/arch/alpha/kernel/sys_ruffian.c * * Copyright (C) 1995 David A Rusling * Copyright (C) 1996 Jay A Estabrook * Copyright (C) 1998, 1999, 2000 Richard Henderson * * Code supporting the RUFFIAN. */ #include <linux/kernel.h> #include <linux/types.h> #include <linux/mm.h> #include <linux/sched.h> #include <linux/pci.h> #include <linux/ioport.h> #include <linux/timex.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_cia.h> #include <asm/tlbflush.h> #include "proto.h" #include "irq_impl.h" #include "pci_impl.h" #include "machvec_impl.h" static void __init ruffian_init_irq(void) { /* Invert 6&7 for i82371 */ *(vulp)PYXIS_INT_HILO = 0x000000c0UL; mb(); *(vulp)PYXIS_INT_CNFG = 0x00002064UL; mb(); /* all clear */ outb(0x11,0xA0); outb(0x08,0xA1); outb(0x02,0xA1); outb(0x01,0xA1); outb(0xFF,0xA1); outb(0x11,0x20); outb(0x00,0x21); outb(0x04,0x21); outb(0x01,0x21); outb(0xFF,0x21); /* Finish writing the 82C59A PIC Operation Control Words */ outb(0x20,0xA0); outb(0x20,0x20); init_i8259a_irqs(); /* Not interested in the bogus interrupts (0,3,6), NMI (1), HALT (2), flash (5), or 21142 (8). */ init_pyxis_irqs(0x16f0000); common_init_isa_dma(); } #define RUFFIAN_LATCH DIV_ROUND_CLOSEST(PIT_TICK_RATE, HZ) static void __init ruffian_init_rtc(void) { /* Ruffian does not have the RTC connected to the CPU timer interrupt. Instead, it uses the PIT connected to IRQ 0. */ /* Setup interval timer. */ outb(0x34, 0x43); /* binary, mode 2, LSB/MSB, ch 0 */ outb(RUFFIAN_LATCH & 0xff, 0x40); /* LSB */ outb(RUFFIAN_LATCH >> 8, 0x40); /* MSB */ outb(0xb6, 0x43); /* pit counter 2: speaker */ outb(0x31, 0x42); outb(0x13, 0x42); setup_irq(0, &timer_irqaction); } static void ruffian_kill_arch (int mode) { cia_kill_arch(mode); #if 0 /* This only causes re-entry to ARCSBIOS */ /* Perhaps this works for other PYXIS as well? */ *(vuip) PYXIS_RESET = 0x0000dead; mb(); #endif } /* * Interrupt routing: * * Primary bus * IdSel INTA INTB INTC INTD * 21052 13 - - - - * SIO 14 23 - - - * 21143 15 44 - - - * Slot 0 17 43 42 41 40 * * Secondary bus * IdSel INTA INTB INTC INTD * Slot 0 8 (18) 19 18 17 16 * Slot 1 9 (19) 31 30 29 28 * Slot 2 10 (20) 27 26 25 24 * Slot 3 11 (21) 39 38 37 36 * Slot 4 12 (22) 35 34 33 32 * 53c875 13 (23) 20 - - - * */ static int ruffian_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) { static char irq_tab[11][5] = { /*INT INTA INTB INTC INTD */ {-1, -1, -1, -1, -1}, /* IdSel 13, 21052 */ {-1, -1, -1, -1, -1}, /* IdSel 14, SIO */ {44, 44, 44, 44, 44}, /* IdSel 15, 21143 */ {-1, -1, -1, -1, -1}, /* IdSel 16, none */ {43, 43, 42, 41, 40}, /* IdSel 17, 64-bit slot */ /* the next 6 are actually on PCI bus 1, across the bridge */ {19, 19, 18, 17, 16}, /* IdSel 8, slot 0 */ {31, 31, 30, 29, 28}, /* IdSel 9, slot 1 */ {27, 27, 26, 25, 24}, /* IdSel 10, slot 2 */ {39, 39, 38, 37, 36}, /* IdSel 11, slot 3 */ {35, 35, 34, 33, 32}, /* IdSel 12, slot 4 */ {20, 20, 20, 20, 20}, /* IdSel 13, 53c875 */ }; const long min_idsel = 13, max_idsel = 23, irqs_per_slot = 5; return COMMON_TABLE_LOOKUP; } static u8 ruffian_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) == 13) { slot = PCI_SLOT(dev->devfn) + 10; } else { /* Must be a card-based bridge. */ do { if (PCI_SLOT(dev->bus->self->devfn) == 13) { slot = PCI_SLOT(dev->devfn) + 10; 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; } #ifdef BUILDING_FOR_MILO /* * The DeskStation Ruffian motherboard firmware does not place * the memory size in the PALimpure area. Therefore, we use * the Bank Configuration Registers in PYXIS to obtain the size. */ static unsigned long __init ruffian_get_bank_size(unsigned long offset) { unsigned long bank_addr, bank, ret = 0; /* Valid offsets are: 0x800, 0x840 and 0x880 since Ruffian only uses three banks. */ bank_addr = (unsigned long)PYXIS_MCR + offset; bank = *(vulp)bank_addr; /* Check BANK_ENABLE */ if (bank & 0x01) { static unsigned long size[] __initdata = { 0x40000000UL, /* 0x00, 1G */ 0x20000000UL, /* 0x02, 512M */ 0x10000000UL, /* 0x04, 256M */ 0x08000000UL, /* 0x06, 128M */ 0x04000000UL, /* 0x08, 64M */ 0x02000000UL, /* 0x0a, 32M */ 0x01000000UL, /* 0x0c, 16M */ 0x00800000UL, /* 0x0e, 8M */ 0x80000000UL, /* 0x10, 2G */ }; bank = (bank & 0x1e) >> 1; if (bank < ARRAY_SIZE(size)) ret = size[bank]; } return ret; } #endif /* BUILDING_FOR_MILO */ /* * The System Vector */ struct alpha_machine_vector ruffian_mv __initmv = { .vector_name = "Ruffian", DO_EV5_MMU, DO_DEFAULT_RTC, DO_PYXIS_IO, .machine_check = cia_machine_check, .max_isa_dma_address = ALPHA_RUFFIAN_MAX_ISA_DMA_ADDRESS, .min_io_address = DEFAULT_IO_BASE, .min_mem_address = DEFAULT_MEM_BASE, .pci_dac_offset = PYXIS_DAC_OFFSET, .nr_irqs = 48, .device_interrupt = pyxis_device_interrupt, .init_arch = pyxis_init_arch, .init_irq = ruffian_init_irq, .init_rtc = ruffian_init_rtc, .init_pci = cia_init_pci, .kill_arch = ruffian_kill_arch, .pci_map_irq = ruffian_map_irq, .pci_swizzle = ruffian_swizzle, }; ALIAS_MV(ruffian)