mirror of
https://github.com/torvalds/linux
synced 2024-10-03 18:00:50 +00:00
6471f52af7
Replace bootmem allocator with memblock and enable use of NO_BOOTMEM like on most other architectures. Alpha gets the description of the physical memory from the firmware as an array of memory clusters. Each cluster that is not reserved by the firmware is added to memblock.memory. Once the memblock.memory is set up, we reserve the kernel and initrd pages with memblock reserve. Since we don't need the bootmem bitmap anymore, the code that finds an appropriate place is removed. The conversion does not take care of NUMA support which is marked broken for more than 10 years now. Link: http://lkml.kernel.org/r/1535952894-10967-1-git-send-email-rppt@linux.vnet.ibm.com Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Michal Hocko <mhocko@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
421 lines
10 KiB
C
421 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* linux/arch/alpha/kernel/core_irongate.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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* Copyright (C) 1999 Alpha Processor, Inc.,
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* (David Daniel, Stig Telfer, Soohoon Lee)
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*
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* Code common to all IRONGATE 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_irongate.h>
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#undef __EXTERN_INLINE
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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/initrd.h>
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#include <linux/bootmem.h>
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#include <linux/memblock.h>
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#include <asm/ptrace.h>
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#include <asm/cacheflush.h>
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#include <asm/tlbflush.h>
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#include "proto.h"
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#include "pci_impl.h"
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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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igcsr32 *IronECC;
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/*
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* Given a bus, device, and function number, compute resulting
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* configuration space address accordingly. It is therefore not safe
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* to have concurrent invocations to configuration space access
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* routines, but there really shouldn't be any need for this.
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*
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* addr[31:24] reserved
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* addr[23:16] bus number (8 bits = 128 possible buses)
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* addr[15:11] Device number (5 bits)
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* addr[10: 8] function number
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* addr[ 7: 2] register number
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*
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* For IRONGATE:
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* if (bus = addr[23:16]) == 0
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* then
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* type 0 config cycle:
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* addr_on_pci[31:11] = id selection for device = addr[15:11]
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* addr_on_pci[10: 2] = addr[10: 2] ???
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* addr_on_pci[ 1: 0] = 00
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* else
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* type 1 config cycle (pass on with no decoding):
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* addr_on_pci[31:24] = 0
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* addr_on_pci[23: 2] = addr[23: 2]
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* addr_on_pci[ 1: 0] = 01
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* fi
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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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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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*type1 = (bus != 0);
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addr = (bus << 16) | (device_fn << 8) | where;
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addr |= IRONGATE_CONF;
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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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irongate_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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irongate_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 irongate_pci_ops =
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{
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.read = irongate_read_config,
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.write = irongate_write_config,
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};
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int
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irongate_pci_clr_err(void)
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{
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unsigned int nmi_ctl=0;
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unsigned int IRONGATE_jd;
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again:
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IRONGATE_jd = IRONGATE0->stat_cmd;
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printk("Iron stat_cmd %x\n", IRONGATE_jd);
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IRONGATE0->stat_cmd = IRONGATE_jd; /* write again clears error bits */
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mb();
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IRONGATE_jd = IRONGATE0->stat_cmd; /* re-read to force write */
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IRONGATE_jd = *IronECC;
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printk("Iron ECC %x\n", IRONGATE_jd);
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*IronECC = IRONGATE_jd; /* write again clears error bits */
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mb();
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IRONGATE_jd = *IronECC; /* re-read to force write */
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/* Clear ALI NMI */
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nmi_ctl = inb(0x61);
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nmi_ctl |= 0x0c;
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outb(nmi_ctl, 0x61);
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nmi_ctl &= ~0x0c;
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outb(nmi_ctl, 0x61);
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IRONGATE_jd = *IronECC;
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if (IRONGATE_jd & 0x300) goto again;
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return 0;
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}
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#define IRONGATE_3GB 0xc0000000UL
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/* On Albacore (aka UP1500) with 4Gb of RAM we have to reserve some
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memory for PCI. At this point we just reserve memory above 3Gb. Most
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of this memory will be freed after PCI setup is done. */
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static void __init
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albacore_init_arch(void)
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{
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unsigned long memtop = max_low_pfn << PAGE_SHIFT;
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unsigned long pci_mem = (memtop + 0x1000000UL) & ~0xffffffUL;
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struct percpu_struct *cpu;
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int pal_rev, pal_var;
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cpu = (struct percpu_struct*)((char*)hwrpb + hwrpb->processor_offset);
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pal_rev = cpu->pal_revision & 0xffff;
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pal_var = (cpu->pal_revision >> 16) & 0xff;
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/* Consoles earlier than A5.6-18 (OSF PALcode v1.62-2) set up
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the CPU incorrectly (leave speculative stores enabled),
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which causes memory corruption under certain conditions.
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Issue a warning for such consoles. */
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if (alpha_using_srm &&
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(pal_rev < 0x13e || (pal_rev == 0x13e && pal_var < 2)))
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printk(KERN_WARNING "WARNING! Upgrade to SRM A5.6-19 "
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"or later\n");
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if (pci_mem > IRONGATE_3GB)
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pci_mem = IRONGATE_3GB;
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IRONGATE0->pci_mem = pci_mem;
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alpha_mv.min_mem_address = pci_mem;
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if (memtop > pci_mem) {
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#ifdef CONFIG_BLK_DEV_INITRD
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extern unsigned long initrd_start, initrd_end;
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extern void *move_initrd(unsigned long);
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/* Move the initrd out of the way. */
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if (initrd_end && __pa(initrd_end) > pci_mem) {
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unsigned long size;
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size = initrd_end - initrd_start;
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free_bootmem_node(NODE_DATA(0), __pa(initrd_start),
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PAGE_ALIGN(size));
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if (!move_initrd(pci_mem))
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printk("irongate_init_arch: initrd too big "
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"(%ldK)\ndisabling initrd\n",
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size / 1024);
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}
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#endif
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memblock_reserve(pci_mem, memtop - pci_mem);
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printk("irongate_init_arch: temporarily reserving "
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"region %08lx-%08lx for PCI\n", pci_mem, memtop - 1);
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}
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}
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static void __init
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irongate_setup_agp(void)
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{
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/* Disable the GART window. AGPGART doesn't work due to yet
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unresolved memory coherency issues... */
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IRONGATE0->agpva = IRONGATE0->agpva & ~0xf;
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alpha_agpgart_size = 0;
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}
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void __init
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irongate_init_arch(void)
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{
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struct pci_controller *hose;
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int amd761 = (IRONGATE0->dev_vendor >> 16) > 0x7006; /* Albacore? */
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IronECC = amd761 ? &IRONGATE0->bacsr54_eccms761 : &IRONGATE0->dramms;
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irongate_pci_clr_err();
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if (amd761)
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albacore_init_arch();
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irongate_setup_agp();
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/*
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* Create our single hose.
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*/
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pci_isa_hose = hose = alloc_pci_controller();
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hose->io_space = &ioport_resource;
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hose->mem_space = &iomem_resource;
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hose->index = 0;
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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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= (IRONGATE_MEM & 0xffffffffffUL) | 0x80000000000UL;
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hose->dense_io_base
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= (IRONGATE_IO & 0xffffffffffUL) | 0x80000000000UL;
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hose->sg_isa = hose->sg_pci = NULL;
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__direct_map_base = 0;
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__direct_map_size = 0xffffffff;
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}
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/*
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* IO map and AGP support
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*/
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#include <linux/vmalloc.h>
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#include <linux/agp_backend.h>
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#include <linux/agpgart.h>
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#include <linux/export.h>
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#include <asm/pgalloc.h>
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#define GET_PAGE_DIR_OFF(addr) (addr >> 22)
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#define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr))
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#define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12)
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#define GET_GATT(addr) (gatt_pages[GET_PAGE_DIR_IDX(addr)])
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void __iomem *
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irongate_ioremap(unsigned long addr, unsigned long size)
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{
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struct vm_struct *area;
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unsigned long vaddr;
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unsigned long baddr, last;
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u32 *mmio_regs, *gatt_pages, *cur_gatt, pte;
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unsigned long gart_bus_addr;
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if (!alpha_agpgart_size)
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return (void __iomem *)(addr + IRONGATE_MEM);
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gart_bus_addr = (unsigned long)IRONGATE0->bar0 &
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PCI_BASE_ADDRESS_MEM_MASK;
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/*
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* Check for within the AGP aperture...
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*/
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do {
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/*
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* Check the AGP area
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*/
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if (addr >= gart_bus_addr && addr + size - 1 <
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gart_bus_addr + alpha_agpgart_size)
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break;
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/*
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* Not found - assume legacy ioremap
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*/
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return (void __iomem *)(addr + IRONGATE_MEM);
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} while(0);
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mmio_regs = (u32 *)(((unsigned long)IRONGATE0->bar1 &
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PCI_BASE_ADDRESS_MEM_MASK) + IRONGATE_MEM);
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gatt_pages = (u32 *)(phys_to_virt(mmio_regs[1])); /* FIXME */
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/*
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* Adjust the limits (mappings must be page aligned)
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*/
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if (addr & ~PAGE_MASK) {
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printk("AGP ioremap failed... addr not page aligned (0x%lx)\n",
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addr);
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return (void __iomem *)(addr + IRONGATE_MEM);
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}
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last = addr + size - 1;
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size = PAGE_ALIGN(last) - addr;
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#if 0
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printk("irongate_ioremap(0x%lx, 0x%lx)\n", addr, size);
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printk("irongate_ioremap: gart_bus_addr 0x%lx\n", gart_bus_addr);
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printk("irongate_ioremap: gart_aper_size 0x%lx\n", gart_aper_size);
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printk("irongate_ioremap: mmio_regs %p\n", mmio_regs);
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printk("irongate_ioremap: gatt_pages %p\n", gatt_pages);
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for(baddr = addr; baddr <= last; baddr += PAGE_SIZE)
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{
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cur_gatt = phys_to_virt(GET_GATT(baddr) & ~1);
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pte = cur_gatt[GET_GATT_OFF(baddr)] & ~1;
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printk("irongate_ioremap: cur_gatt %p pte 0x%x\n",
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cur_gatt, pte);
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}
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#endif
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/*
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* Map it
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*/
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area = get_vm_area(size, VM_IOREMAP);
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if (!area) return NULL;
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for(baddr = addr, vaddr = (unsigned long)area->addr;
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baddr <= last;
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baddr += PAGE_SIZE, vaddr += PAGE_SIZE)
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{
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cur_gatt = phys_to_virt(GET_GATT(baddr) & ~1);
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pte = cur_gatt[GET_GATT_OFF(baddr)] & ~1;
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if (__alpha_remap_area_pages(vaddr,
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pte, PAGE_SIZE, 0)) {
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printk("AGP ioremap: FAILED to map...\n");
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vfree(area->addr);
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return NULL;
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}
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}
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flush_tlb_all();
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vaddr = (unsigned long)area->addr + (addr & ~PAGE_MASK);
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#if 0
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printk("irongate_ioremap(0x%lx, 0x%lx) returning 0x%lx\n",
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addr, size, vaddr);
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#endif
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return (void __iomem *)vaddr;
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}
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EXPORT_SYMBOL(irongate_ioremap);
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void
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irongate_iounmap(volatile void __iomem *xaddr)
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{
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unsigned long addr = (unsigned long) xaddr;
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if (((long)addr >> 41) == -2)
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return; /* kseg map, nothing to do */
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if (addr)
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return vfree((void *)(PAGE_MASK & addr));
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}
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EXPORT_SYMBOL(irongate_iounmap);
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