485 lines
13 KiB
C
485 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* linux/arch/alpha/kernel/core_tsunami.c
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*
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* Based on code written by David A. Rusling (david.rusling@reo.mts.dec.com).
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*
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* Code common to all TSUNAMI core logic chips.
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*/
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#define __EXTERN_INLINE inline
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#include <asm/io.h>
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#include <asm/core_tsunami.h>
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#undef __EXTERN_INLINE
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/sched.h>
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#include <linux/init.h>
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#include <linux/memblock.h>
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#include <asm/ptrace.h>
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#include <asm/smp.h>
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#include <asm/vga.h>
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#include "proto.h"
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#include "pci_impl.h"
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/* Save Tsunami configuration data as the console had it set up. */
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struct
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{
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unsigned long wsba[4];
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unsigned long wsm[4];
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unsigned long tba[4];
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} saved_config[2] __attribute__((common));
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/*
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* NOTE: Herein lie back-to-back mb instructions. They are magic.
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* One plausible explanation is that the I/O controller does not properly
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* handle the system transaction. Another involves timing. Ho hum.
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*/
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/*
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* BIOS32-style PCI interface:
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*/
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#define DEBUG_CONFIG 0
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#if DEBUG_CONFIG
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# define DBG_CFG(args) printk args
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#else
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# define DBG_CFG(args)
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#endif
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/*
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* Given a bus, device, and function number, compute resulting
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* configuration space address
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* accordingly. It is therefore not safe to have concurrent
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* invocations to configuration space access routines, but there
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* really shouldn't be any need for this.
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*
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* Note that all config space accesses use Type 1 address format.
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*
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* Note also that type 1 is determined by non-zero bus number.
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*
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* Type 1:
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*
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* 3 3|3 3 2 2|2 2 2 2|2 2 2 2|1 1 1 1|1 1 1 1|1 1
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* 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
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | | | | | | | | | | |B|B|B|B|B|B|B|B|D|D|D|D|D|F|F|F|R|R|R|R|R|R|0|1|
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*
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* 31:24 reserved
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* 23:16 bus number (8 bits = 128 possible buses)
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* 15:11 Device number (5 bits)
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* 10:8 function number
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* 7:2 register number
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*
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* Notes:
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* The function number selects which function of a multi-function device
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* (e.g., SCSI and Ethernet).
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*
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* The register selects a DWORD (32 bit) register offset. Hence it
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* doesn't get shifted by 2 bits as we want to "drop" the bottom two
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* bits.
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*/
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static int
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mk_conf_addr(struct pci_bus *pbus, unsigned int device_fn, int where,
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unsigned long *pci_addr, unsigned char *type1)
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{
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struct pci_controller *hose = pbus->sysdata;
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unsigned long addr;
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u8 bus = pbus->number;
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DBG_CFG(("mk_conf_addr(bus=%d ,device_fn=0x%x, where=0x%x, "
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"pci_addr=0x%p, type1=0x%p)\n",
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bus, device_fn, where, pci_addr, type1));
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if (!pbus->parent) /* No parent means peer PCI bus. */
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bus = 0;
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*type1 = (bus != 0);
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addr = (bus << 16) | (device_fn << 8) | where;
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addr |= hose->config_space_base;
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*pci_addr = addr;
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DBG_CFG(("mk_conf_addr: returning pci_addr 0x%lx\n", addr));
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return 0;
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}
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static int
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tsunami_read_config(struct pci_bus *bus, unsigned int devfn, int where,
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int size, u32 *value)
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{
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unsigned long addr;
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unsigned char type1;
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if (mk_conf_addr(bus, devfn, where, &addr, &type1))
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return PCIBIOS_DEVICE_NOT_FOUND;
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switch (size) {
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case 1:
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*value = __kernel_ldbu(*(vucp)addr);
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break;
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case 2:
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*value = __kernel_ldwu(*(vusp)addr);
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break;
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case 4:
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*value = *(vuip)addr;
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break;
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}
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return PCIBIOS_SUCCESSFUL;
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}
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static int
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tsunami_write_config(struct pci_bus *bus, unsigned int devfn, int where,
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int size, u32 value)
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{
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unsigned long addr;
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unsigned char type1;
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if (mk_conf_addr(bus, devfn, where, &addr, &type1))
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return PCIBIOS_DEVICE_NOT_FOUND;
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switch (size) {
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case 1:
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__kernel_stb(value, *(vucp)addr);
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mb();
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__kernel_ldbu(*(vucp)addr);
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break;
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case 2:
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__kernel_stw(value, *(vusp)addr);
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mb();
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__kernel_ldwu(*(vusp)addr);
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break;
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case 4:
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*(vuip)addr = value;
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mb();
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*(vuip)addr;
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break;
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}
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return PCIBIOS_SUCCESSFUL;
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}
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struct pci_ops tsunami_pci_ops =
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{
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.read = tsunami_read_config,
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.write = tsunami_write_config,
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};
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void
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tsunami_pci_tbi(struct pci_controller *hose, dma_addr_t start, dma_addr_t end)
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{
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tsunami_pchip *pchip = hose->index ? TSUNAMI_pchip1 : TSUNAMI_pchip0;
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volatile unsigned long *csr;
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unsigned long value;
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/* We can invalidate up to 8 tlb entries in a go. The flush
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matches against <31:16> in the pci address. */
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csr = &pchip->tlbia.csr;
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if (((start ^ end) & 0xffff0000) == 0)
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csr = &pchip->tlbiv.csr;
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/* For TBIA, it doesn't matter what value we write. For TBI,
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it's the shifted tag bits. */
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value = (start & 0xffff0000) >> 12;
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*csr = value;
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mb();
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*csr;
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}
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#ifdef NXM_MACHINE_CHECKS_ON_TSUNAMI
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static long __init
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tsunami_probe_read(volatile unsigned long *vaddr)
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{
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long dont_care, probe_result;
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int cpu = smp_processor_id();
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int s = swpipl(IPL_MCHECK - 1);
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mcheck_taken(cpu) = 0;
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mcheck_expected(cpu) = 1;
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mb();
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dont_care = *vaddr;
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draina();
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mcheck_expected(cpu) = 0;
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probe_result = !mcheck_taken(cpu);
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mcheck_taken(cpu) = 0;
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setipl(s);
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printk("dont_care == 0x%lx\n", dont_care);
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return probe_result;
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}
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static long __init
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tsunami_probe_write(volatile unsigned long *vaddr)
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{
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long true_contents, probe_result = 1;
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TSUNAMI_cchip->misc.csr |= (1L << 28); /* clear NXM... */
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true_contents = *vaddr;
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*vaddr = 0;
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draina();
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if (TSUNAMI_cchip->misc.csr & (1L << 28)) {
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int source = (TSUNAMI_cchip->misc.csr >> 29) & 7;
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TSUNAMI_cchip->misc.csr |= (1L << 28); /* ...and unlock NXS. */
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probe_result = 0;
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printk("tsunami_probe_write: unit %d at 0x%016lx\n", source,
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(unsigned long)vaddr);
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}
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if (probe_result)
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*vaddr = true_contents;
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return probe_result;
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}
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#else
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#define tsunami_probe_read(ADDR) 1
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#endif /* NXM_MACHINE_CHECKS_ON_TSUNAMI */
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static void __init
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tsunami_init_one_pchip(tsunami_pchip *pchip, int index)
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{
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struct pci_controller *hose;
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if (tsunami_probe_read(&pchip->pctl.csr) == 0)
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return;
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hose = alloc_pci_controller();
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if (index == 0)
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pci_isa_hose = hose;
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hose->io_space = alloc_resource();
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hose->mem_space = alloc_resource();
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/* This is for userland consumption. For some reason, the 40-bit
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PIO bias that we use in the kernel through KSEG didn't work for
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the page table based user mappings. So make sure we get the
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43-bit PIO bias. */
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hose->sparse_mem_base = 0;
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hose->sparse_io_base = 0;
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hose->dense_mem_base
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= (TSUNAMI_MEM(index) & 0xffffffffffL) | 0x80000000000L;
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hose->dense_io_base
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= (TSUNAMI_IO(index) & 0xffffffffffL) | 0x80000000000L;
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hose->config_space_base = TSUNAMI_CONF(index);
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hose->index = index;
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hose->io_space->start = TSUNAMI_IO(index) - TSUNAMI_IO_BIAS;
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hose->io_space->end = hose->io_space->start + TSUNAMI_IO_SPACE - 1;
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hose->io_space->name = pci_io_names[index];
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hose->io_space->flags = IORESOURCE_IO;
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hose->mem_space->start = TSUNAMI_MEM(index) - TSUNAMI_MEM_BIAS;
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hose->mem_space->end = hose->mem_space->start + 0xffffffff;
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hose->mem_space->name = pci_mem_names[index];
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hose->mem_space->flags = IORESOURCE_MEM;
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if (request_resource(&ioport_resource, hose->io_space) < 0)
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printk(KERN_ERR "Failed to request IO on hose %d\n", index);
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if (request_resource(&iomem_resource, hose->mem_space) < 0)
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printk(KERN_ERR "Failed to request MEM on hose %d\n", index);
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/*
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* Save the existing PCI window translations. SRM will
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* need them when we go to reboot.
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*/
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saved_config[index].wsba[0] = pchip->wsba[0].csr;
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saved_config[index].wsm[0] = pchip->wsm[0].csr;
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saved_config[index].tba[0] = pchip->tba[0].csr;
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saved_config[index].wsba[1] = pchip->wsba[1].csr;
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saved_config[index].wsm[1] = pchip->wsm[1].csr;
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saved_config[index].tba[1] = pchip->tba[1].csr;
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saved_config[index].wsba[2] = pchip->wsba[2].csr;
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saved_config[index].wsm[2] = pchip->wsm[2].csr;
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saved_config[index].tba[2] = pchip->tba[2].csr;
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saved_config[index].wsba[3] = pchip->wsba[3].csr;
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saved_config[index].wsm[3] = pchip->wsm[3].csr;
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saved_config[index].tba[3] = pchip->tba[3].csr;
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/*
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* Set up the PCI to main memory translation windows.
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*
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* Note: Window 3 is scatter-gather only
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*
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* Window 0 is scatter-gather 8MB at 8MB (for isa)
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* Window 1 is scatter-gather (up to) 1GB at 1GB
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* Window 2 is direct access 2GB at 2GB
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*
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* NOTE: we need the align_entry settings for Acer devices on ES40,
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* specifically floppy and IDE when memory is larger than 2GB.
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*/
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hose->sg_isa = iommu_arena_new(hose, 0x00800000, 0x00800000,
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SMP_CACHE_BYTES);
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/* Initially set for 4 PTEs, but will be overridden to 64K for ISA. */
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hose->sg_isa->align_entry = 4;
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hose->sg_pci = iommu_arena_new(hose, 0x40000000,
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size_for_memory(0x40000000),
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SMP_CACHE_BYTES);
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hose->sg_pci->align_entry = 4; /* Tsunami caches 4 PTEs at a time */
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__direct_map_base = 0x80000000;
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__direct_map_size = 0x80000000;
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pchip->wsba[0].csr = hose->sg_isa->dma_base | 3;
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pchip->wsm[0].csr = (hose->sg_isa->size - 1) & 0xfff00000;
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pchip->tba[0].csr = virt_to_phys(hose->sg_isa->ptes);
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pchip->wsba[1].csr = hose->sg_pci->dma_base | 3;
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pchip->wsm[1].csr = (hose->sg_pci->size - 1) & 0xfff00000;
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pchip->tba[1].csr = virt_to_phys(hose->sg_pci->ptes);
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pchip->wsba[2].csr = 0x80000000 | 1;
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pchip->wsm[2].csr = (0x80000000 - 1) & 0xfff00000;
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pchip->tba[2].csr = 0;
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pchip->wsba[3].csr = 0;
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/* Enable the Monster Window to make DAC pci64 possible. */
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pchip->pctl.csr |= pctl_m_mwin;
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tsunami_pci_tbi(hose, 0, -1);
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}
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void __iomem *
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tsunami_ioportmap(unsigned long addr)
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{
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FIXUP_IOADDR_VGA(addr);
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return (void __iomem *)(addr + TSUNAMI_IO_BIAS);
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}
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void __iomem *
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tsunami_ioremap(unsigned long addr, unsigned long size)
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{
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FIXUP_MEMADDR_VGA(addr);
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return (void __iomem *)(addr + TSUNAMI_MEM_BIAS);
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}
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#ifndef CONFIG_ALPHA_GENERIC
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EXPORT_SYMBOL(tsunami_ioportmap);
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EXPORT_SYMBOL(tsunami_ioremap);
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#endif
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void __init
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tsunami_init_arch(void)
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{
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#ifdef NXM_MACHINE_CHECKS_ON_TSUNAMI
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unsigned long tmp;
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/* Ho hum.. init_arch is called before init_IRQ, but we need to be
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able to handle machine checks. So install the handler now. */
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wrent(entInt, 0);
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/* NXMs just don't matter to Tsunami--unless they make it
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choke completely. */
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tmp = (unsigned long)(TSUNAMI_cchip - 1);
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printk("%s: probing bogus address: 0x%016lx\n", __func__, bogus_addr);
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printk("\tprobe %s\n",
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tsunami_probe_write((unsigned long *)bogus_addr)
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? "succeeded" : "failed");
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#endif /* NXM_MACHINE_CHECKS_ON_TSUNAMI */
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#if 0
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printk("%s: CChip registers:\n", __func__);
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printk("%s: CSR_CSC 0x%lx\n", __func__, TSUNAMI_cchip->csc.csr);
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printk("%s: CSR_MTR 0x%lx\n", __func__, TSUNAMI_cchip.mtr.csr);
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printk("%s: CSR_MISC 0x%lx\n", __func__, TSUNAMI_cchip->misc.csr);
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printk("%s: CSR_DIM0 0x%lx\n", __func__, TSUNAMI_cchip->dim0.csr);
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printk("%s: CSR_DIM1 0x%lx\n", __func__, TSUNAMI_cchip->dim1.csr);
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printk("%s: CSR_DIR0 0x%lx\n", __func__, TSUNAMI_cchip->dir0.csr);
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printk("%s: CSR_DIR1 0x%lx\n", __func__, TSUNAMI_cchip->dir1.csr);
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printk("%s: CSR_DRIR 0x%lx\n", __func__, TSUNAMI_cchip->drir.csr);
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printk("%s: DChip registers:\n");
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printk("%s: CSR_DSC 0x%lx\n", __func__, TSUNAMI_dchip->dsc.csr);
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printk("%s: CSR_STR 0x%lx\n", __func__, TSUNAMI_dchip->str.csr);
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printk("%s: CSR_DREV 0x%lx\n", __func__, TSUNAMI_dchip->drev.csr);
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#endif
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/* With multiple PCI busses, we play with I/O as physical addrs. */
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ioport_resource.end = ~0UL;
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/* Find how many hoses we have, and initialize them. TSUNAMI
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and TYPHOON can have 2, but might only have 1 (DS10). */
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tsunami_init_one_pchip(TSUNAMI_pchip0, 0);
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if (TSUNAMI_cchip->csc.csr & 1L<<14)
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tsunami_init_one_pchip(TSUNAMI_pchip1, 1);
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/* Check for graphic console location (if any). */
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find_console_vga_hose();
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}
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static void
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tsunami_kill_one_pchip(tsunami_pchip *pchip, int index)
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{
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pchip->wsba[0].csr = saved_config[index].wsba[0];
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pchip->wsm[0].csr = saved_config[index].wsm[0];
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pchip->tba[0].csr = saved_config[index].tba[0];
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pchip->wsba[1].csr = saved_config[index].wsba[1];
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pchip->wsm[1].csr = saved_config[index].wsm[1];
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pchip->tba[1].csr = saved_config[index].tba[1];
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pchip->wsba[2].csr = saved_config[index].wsba[2];
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pchip->wsm[2].csr = saved_config[index].wsm[2];
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pchip->tba[2].csr = saved_config[index].tba[2];
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pchip->wsba[3].csr = saved_config[index].wsba[3];
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pchip->wsm[3].csr = saved_config[index].wsm[3];
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pchip->tba[3].csr = saved_config[index].tba[3];
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}
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void
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tsunami_kill_arch(int mode)
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{
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tsunami_kill_one_pchip(TSUNAMI_pchip0, 0);
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if (TSUNAMI_cchip->csc.csr & 1L<<14)
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tsunami_kill_one_pchip(TSUNAMI_pchip1, 1);
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}
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static inline void
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tsunami_pci_clr_err_1(tsunami_pchip *pchip)
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{
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pchip->perror.csr;
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pchip->perror.csr = 0x040;
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mb();
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pchip->perror.csr;
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}
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static inline void
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tsunami_pci_clr_err(void)
|
||
{
|
||
tsunami_pci_clr_err_1(TSUNAMI_pchip0);
|
||
|
||
/* TSUNAMI and TYPHOON can have 2, but might only have 1 (DS10) */
|
||
if (TSUNAMI_cchip->csc.csr & 1L<<14)
|
||
tsunami_pci_clr_err_1(TSUNAMI_pchip1);
|
||
}
|
||
|
||
void
|
||
tsunami_machine_check(unsigned long vector, unsigned long la_ptr)
|
||
{
|
||
/* Clear error before any reporting. */
|
||
mb();
|
||
mb(); /* magic */
|
||
draina();
|
||
tsunami_pci_clr_err();
|
||
wrmces(0x7);
|
||
mb();
|
||
|
||
process_mcheck_info(vector, la_ptr, "TSUNAMI",
|
||
mcheck_expected(smp_processor_id()));
|
||
}
|